WO2020243934A1 - Optical image acquisition apparatus and electronic device - Google Patents

Optical image acquisition apparatus and electronic device Download PDF

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Publication number
WO2020243934A1
WO2020243934A1 PCT/CN2019/090214 CN2019090214W WO2020243934A1 WO 2020243934 A1 WO2020243934 A1 WO 2020243934A1 CN 2019090214 W CN2019090214 W CN 2019090214W WO 2020243934 A1 WO2020243934 A1 WO 2020243934A1
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WO
WIPO (PCT)
Prior art keywords
lens
image acquisition
optical image
acquisition device
optical
Prior art date
Application number
PCT/CN2019/090214
Other languages
French (fr)
Chinese (zh)
Inventor
王红超
沈健
Original Assignee
深圳市汇顶科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市汇顶科技股份有限公司 filed Critical 深圳市汇顶科技股份有限公司
Priority to CN201980003964.2A priority Critical patent/CN111095270A/en
Priority to PCT/CN2019/090214 priority patent/WO2020243934A1/en
Publication of WO2020243934A1 publication Critical patent/WO2020243934A1/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms

Definitions

  • the embodiments of the present application relate to the field of electronics, and more specifically, to an optical image acquisition device and electronic equipment.
  • Optical filters are used to pass light in a specific wavelength range and are one of the important components of optical cameras.
  • the traditional filter is used to achieve the filtering effect by coating the surface of the base glass.
  • the thickness of the traditional optical filter is limited by the strength of the base material such as white glass and blue glass and cannot be made too thin, which largely limits the thickness of the optical camera.
  • optical image acquisition devices such as optical cameras, how to reduce the thickness of the filter without affecting the image quality is an urgent problem to be solved.
  • the embodiments of the present application provide an optical image acquisition device and electronic equipment, which can reduce the thickness of the filter film layer, thereby reducing the thickness of the optical image acquisition device.
  • an optical image acquisition device including:
  • a lens assembly including a lens, the lens having at least one plane surface, the plane surface is plated with a filter film layer, the lens is used to converge light signals, the filter film layer is used to filter out non-target wavebands Optical signal, the optical signal passing through the target band;
  • the sensor chip is arranged under the lens assembly, and the sensor chip is used for imaging according to the light signal condensed by the lens.
  • the filter film layer is plated on at least one plane surface in the lens, so that the influence of the thickness of the base material on the thickness of the filter film layer can be avoided, and the thickness of the filter film layer can be reduced. Furthermore, the thickness of the optical image acquisition device is reduced, the process flow is reduced, the assembly difficulty is simplified, and the cost reduction is achieved.
  • the lens includes at least one lens, the at least one lens includes at least one first lens, and the first lens has the plane surface.
  • the lens includes at least one lens, the at least one lens includes at least one second lens, and the second lens surface is formed with the plane surface.
  • the object side surface or the image side surface of the second lens is filled with a transparent material to form the plane surface on the object side surface or the image side surface of the second lens.
  • the refractive index of the transparent material is less than a first threshold.
  • part or all of the at least one lens is a lens composed of aspheric injection lenses.
  • the thickness of the filter film layer plated on each plane surface of the lens is less than or equal to 10 ⁇ m.
  • the total thickness of the filter film layer plated on all plane surfaces in the lens is less than or equal to 20 ⁇ m.
  • the filter film layer includes at least one of the following functional film layers:
  • Anti-reflective layer oleophobic layer, anti-glare layer, infrared cut filter layer.
  • the lens is a macro lens.
  • the focal length of the macro lens ranges from 0.4 mm to 1.8 mm.
  • the lens assembly further includes:
  • the lens holder is used to support the lens barrel.
  • the lens assembly is a lens assembly in which a lens barrel and a lens holder are integrated.
  • the lens assembly is a lens assembly in which the lens barrel and the lens holder are separated.
  • the lens barrel is a straight-through lens barrel or a threaded focusing lens barrel.
  • the target wavelength range is 400 nm to 650 nm.
  • the optical image acquisition device is arranged below the display screen.
  • the lens is specifically configured to condense the light signal reflected by the finger above the display screen and passing through the display screen.
  • an electronic device including: a display screen and
  • FIG. 1 is a schematic structural diagram of an electronic device to which an embodiment of the present application is applied.
  • Figure 2 is a schematic structural diagram of an optical image acquisition device.
  • Figure 3 is a schematic diagram of the lens out of focus when the curved surface of the lens is coated.
  • Fig. 4 is a schematic diagram showing the change of the incident angle of incident light at different positions when the curved surface of the lens is coated.
  • Figure 5 is a schematic diagram of the spectral transmittance of incident light at different angles when the curved surface of the lens is coated.
  • Fig. 6 is a schematic structural diagram of an optical image acquisition device according to an embodiment of the present application.
  • Fig. 7 is a schematic structural diagram of an optical image acquisition device according to another embodiment of the present application.
  • Fig. 8 is a schematic structural diagram of an optical image acquisition device according to still another embodiment of the present application.
  • Fig. 9 is a schematic block diagram of an electronic device according to an embodiment of the present application.
  • embodiments of this application can be applied to optical fingerprint systems, including but not limited to optical fingerprint identification systems and medical diagnostic products based on optical fingerprint imaging.
  • the embodiments of this application only take optical fingerprint systems as an example for description, but should not The embodiments of the application constitute any limitation, and the embodiments of the present application are also applicable to other systems using optical imaging technology.
  • the optical fingerprint system provided in the embodiments of this application can be applied to smart phones, tablet computers, and other mobile terminals with display screens or other terminal devices; more specifically, in the above-mentioned terminal devices, fingerprint identification
  • the device may specifically be an optical fingerprint device, which may be arranged in a partial area or an entire area under the display screen, thereby forming an under-display optical fingerprint system.
  • the fingerprint identification device can also be partially or fully integrated into the display screen of the terminal device, thereby forming an in-display optical fingerprint system.
  • FIG. 1 is a schematic structural diagram of a terminal device to which the embodiment of the application can be applied.
  • the terminal device 10 includes a display screen 120 and an optical fingerprint device 130, wherein the optical fingerprint device 130 is disposed under the display screen 120 Local area.
  • the optical fingerprint device 130 includes an optical fingerprint sensor, and the optical fingerprint sensor includes a sensing array 133 having a plurality of optical sensing units 131, and the area where the sensing array is located or its sensing area is the fingerprint detection area of the optical fingerprint device 130 103.
  • the fingerprint detection area 103 is located in the display area of the display screen 120.
  • the optical fingerprint device 130 may also be arranged in other positions, such as the side of the display screen 120 or the non-transparent area of the edge of the terminal device 10, and the optical fingerprint device 130 may be designed to The optical signal of at least a part of the display area of the display screen 120 is guided to the optical fingerprint device 130, so that the fingerprint detection area 103 is actually located in the display area of the display screen 120.
  • the area of the fingerprint detection area 103 may be different from the area of the sensing array of the optical fingerprint device 130, for example, through optical path design such as lens imaging, reflective folding optical path design, or other optical path design such as light convergence or reflection, etc.
  • the area of the fingerprint detection area 103 of the optical fingerprint device 130 can be made larger than the area of the sensing array of the optical fingerprint device 130.
  • the fingerprint detection area 103 of the optical fingerprint device 130 may also be designed to be substantially the same as the area of the sensing array of the optical fingerprint device 130.
  • the terminal device 10 adopting the above structure does not need to reserve a space on the front side for the fingerprint button (such as the Home button), so that a full screen solution can be adopted, that is, the display area of the display screen 120 It can be basically extended to the front of the entire terminal device 10.
  • the optical fingerprint device 130 includes a light detecting part 134 and an optical component 132, and the light detecting part 134 includes the sensor array and is electrically connected to the sensor array.
  • the connected reading circuit and other auxiliary circuits can be fabricated on a chip (Die) by a semiconductor process, such as an optical imaging chip or an optical fingerprint sensor.
  • the sensing array is specifically a photodetector (Photodetector) array, which includes multiple There are two photodetectors distributed in an array, and the photodetectors can be used as the above-mentioned optical sensing unit.
  • the optical component 132 may be disposed above the sensing array of the light detecting part 134, which may specifically include a filter layer (Filter), a light guide layer or a light path guiding structure, and other optical elements.
  • the filter layer may be used In order to filter out the ambient light penetrating the finger, the light guide layer or light path guiding structure is mainly used to guide the reflected light reflected from the finger surface to the sensor array for optical detection.
  • the optical assembly 132 and the light detecting part 134 may be packaged in the same optical fingerprint component.
  • the optical component 132 and the optical detection part 134 can be packaged in the same optical fingerprint chip, or the optical component 132 can be arranged outside the chip where the optical detection part 134 is located, for example, the optical component 132 is attached above the chip, or some components of the optical assembly 132 are integrated into the chip.
  • the light guide layer or light path guiding structure of the optical component 132 has multiple implementation schemes.
  • the light guide layer may specifically be a collimator layer made on a semiconductor silicon wafer, which has multiple A collimating unit or a micro-hole array.
  • the collimating unit can be specifically a small hole.
  • the reflected light reflected from the finger the light that is perpendicularly incident on the collimating unit can pass through and be passed by the optical sensing unit below it.
  • the light with an excessively large incident angle is attenuated by multiple reflections inside the collimating unit. Therefore, each optical sensing unit can basically only receive the reflected light reflected by the fingerprint pattern directly above it.
  • the sensor array can detect the fingerprint image of the finger.
  • the light guide layer or the light path guide structure may also be an optical lens (Lens) layer, which has one or more lens units, such as a lens group composed of one or more aspheric lenses, which The sensing array used to converge the reflected light reflected from the finger to the light detection part 134 below it, so that the sensing array can perform imaging based on the reflected light, thereby obtaining a fingerprint image of the finger.
  • the optical lens layer may further have a pinhole formed in the optical path of the lens unit, and the pinhole may cooperate with the optical lens layer to expand the field of view of the optical fingerprint device to improve the optical The fingerprint imaging effect of the fingerprint device 130.
  • the light guide layer or the light path guide structure may also specifically adopt a micro-lens (Micro-Lens) layer.
  • the micro-lens layer has a micro-lens array formed by a plurality of micro-lenses, which can be grown by semiconductors.
  • a process or other processes are formed above the sensing array of the light detecting part 134, and each microlens may correspond to one of the sensing units of the sensing array.
  • other optical film layers may be formed between the microlens layer and the sensing unit, such as a dielectric layer or a passivation layer.
  • the microlens layer and the sensing unit may also include The light-blocking layer of the micro-hole, wherein the micro-hole is formed between the corresponding micro-lens and the sensing unit, the light-blocking layer can block the optical interference between the adjacent micro-lens and the sensing unit, and make the sensing
  • the light corresponding to the unit is condensed into the microhole through the microlens and is transmitted to the sensing unit through the microhole to perform optical fingerprint imaging.
  • a microlens layer can be further provided under the collimator layer or the optical lens layer.
  • the collimator layer or the optical lens layer is used in combination with the micro lens layer, its specific laminated structure or optical path may need to be adjusted according to actual needs.
  • the display screen 120 may be a display screen with a self-luminous display unit, such as an organic light-emitting diode (Organic Light-Emitting Diode, OLED) display or a micro-LED (Micro-LED) display Screen.
  • OLED Organic Light-Emitting Diode
  • Micro-LED Micro-LED
  • the optical fingerprint device 130 may use the display unit (ie, an OLED light source) of the OLED display screen 120 located in the fingerprint detection area 103 as an excitation light source for optical fingerprint detection.
  • the display screen 120 emits a beam of light 111 to the target finger 140 above the fingerprint detection area 103.
  • the light 111 is reflected on the surface of the finger 140 to form reflected light or pass through all the fingers.
  • the finger 140 scatters to form scattered light.
  • the above-mentioned reflected light and scattered light are collectively referred to as reflected light. Because fingerprint ridges and valleys have different light reflection capabilities, the reflected light 151 from the fingerprint ridge and the reflected light 152 from the fingerprint ridge have different light intensities.
  • the reflected light passes through the optical component 132, It is received by the sensor array 134 in the optical fingerprint device 130 and converted into a corresponding electrical signal, that is, a fingerprint detection signal; based on the fingerprint detection signal, fingerprint image data can be obtained, and fingerprint matching verification can be further performed, so that the The terminal device 10 implements an optical fingerprint recognition function.
  • the optical fingerprint device 130 may also use a built-in light source or an external light source to provide an optical signal for fingerprint detection.
  • the optical fingerprint device 130 may be suitable for non-self-luminous display screens, such as liquid crystal display screens or other passively-luminous display screens.
  • the optical fingerprint system of the terminal device 10 may also include an excitation light source for optical fingerprint detection.
  • the excitation light source may specifically be an infrared light source or a light source of invisible light of a specific wavelength, which may be arranged under the backlight module of the liquid crystal display or arranged in the edge area under the protective cover of the terminal device 10, and the The optical fingerprint device 130 can be arranged under the edge area of the liquid crystal panel or the protective cover and guided by the light path so that the fingerprint detection light can reach the optical fingerprint device 130; or, the optical fingerprint device 130 can also be arranged in the backlight module. Under the group, and the backlight module is designed to allow the fingerprint detection light to pass through the liquid crystal panel and the backlight module and reach the optical fingerprint device 130 through openings or other optical designs on the film layers such as diffuser, brightness enhancement film, and reflective film. .
  • the optical fingerprint device 130 adopts a built-in light source or an external light source to provide an optical signal for fingerprint detection, the detection principle is the same as that described above.
  • the terminal device 10 further includes a transparent protective cover, and the cover may be a glass cover or a sapphire cover, which is located above the display screen 120 and covers the terminal.
  • the front of the device 10. because, in the embodiment of the present application, the so-called finger pressing on the display screen 120 actually refers to pressing on the cover plate above the display screen 120 or covering the surface of the protective layer of the cover plate.
  • the optical fingerprint device 130 may specifically include a plurality of optical fingerprint sensors; the plurality of optical fingerprint sensors may be arranged side by side under the display screen 120 in a splicing manner, and The sensing areas of the multiple optical fingerprint sensors collectively constitute the fingerprint detection area 103 of the optical fingerprint device 130.
  • the fingerprint detection area 103 of the optical fingerprint device 130 may include multiple sub-areas, and each sub-area corresponds to the sensing area of one of the optical fingerprint sensors, so that the fingerprint collection area of the optical fingerprint module 130 103 can be extended to the main area of the lower half of the display screen, that is, to the area where the finger is habitually pressed, so as to realize the blind fingerprint input operation.
  • the fingerprint detection area 130 can also be extended to half of the display area or even the entire display area, thereby realizing half-screen or full-screen fingerprint detection.
  • the optical image acquisition device 200 includes a lens 210, a lens barrel 220, a lens holder 230, a filter 240, a sensor chip 250 and a circuit board 260.
  • the lens 210 may include at least one lens
  • the lens barrel 220 is used to fix the lens 210
  • the lens holder 230 is used to support the lens barrel 220
  • the filter 240 is disposed under the lens 210 in the lens barrel 220.
  • the mirror base 230 and the sensor chip 250 are disposed above the circuit board 260.
  • the filter 240 is formed by coating the surface of a base material such as white glass, blue glass, etc., through the reflection of different materials to cut off light of a specific wavelength while passing light of a specific wavelength.
  • the thickness of the filter 240 is limited by the strength of the base material and cannot be made too thin, which limits the thickness of the optical image pickup device 200.
  • a film 212 is coated on one side of the lens 211 with a curved pattern.
  • the film 212 can realize the functions of anti-reflection, light filtering and the like.
  • the light When the surface of the lens 211 is coated, the light will be refracted inside the coating layer of the lens 211, where the refracted light path is affected by the refractive index n1 of the lens 211 material and the refractive index n3 of the coating film.
  • the light travels to the film 212 and Refraction will occur again at the interface of the air, and finally the intersection point with the center normal of the lens 211 is F1.
  • F1 and F2 cannot overlap due to the participation of coating.
  • coating on the side of the lens with a curved pattern will change the focal length of the lens.
  • I1 coincides with the normal
  • the incident angle of I2 and the surface of the film 212 is ⁇ 2
  • the incident angle of I3 on the surface of the film 212 is ⁇ 3, where ⁇ 3> ⁇ 2> ⁇ 1.
  • ⁇ 1 corresponds to the spectroscopic curve of the incident light of ⁇ 1, its cut-off half-wavelength is ⁇ 1, and the transmittance data is T1;
  • ⁇ 2 is the curve with an incident angle of ⁇ 2, and its corresponding cut-off half-wavelength is ⁇ 2.
  • the overrate data is T2;
  • ⁇ 3 is the curve whose incident angle is ⁇ 3, the corresponding cut-off half-wavelength is ⁇ 3, and the transmittance data is T3; the larger the angle ⁇ , the smaller the corresponding cut-off half-wavelength value, that is, ⁇ 3 ⁇ 2 ⁇ 1, and the transmittance data will also show that the larger the incident angle, the lower the transmittance, that is, T3 ⁇ T2 ⁇ T1.
  • coating on the curved surface of the lens will cause the radius of curvature of the lens to change, and at the same time cause the transmittance and cutoff wavelength of incident light to shift at different positions.
  • the impact on the lens is the problem of defocusing and the difference in brightness at the center edge.
  • this application proposes an optical image acquisition device.
  • an optical filter that omits the substrate is provided, and the optical coating on the substrate is transplanted to On the optical lens, the thickness of the lens group is reduced, the assembly process is simplified, and the cost is reduced. It also provides a structure and process method for coating the flat surface in the lens assembly to eliminate the non-uniformity of the wavelength selectivity of the coating on the curved surface and the influence on the curvature of the lens surface.
  • FIG. 6 shows a schematic diagram of an optical image acquisition device 300 according to an embodiment of the present application.
  • the optical image acquisition device 300 may be a fingerprint recognition module, which corresponds to the optical fingerprint recognition device 130 in FIG. 1, or the optical image acquisition device 300 may also include a fingerprint recognition module
  • the electronic device of this application does not limit this.
  • the optical image acquisition device 300 may include: a lens assembly 310 and a sensor chip 320.
  • the lens assembly 310 includes a lens 311, the lens 311 has at least one plane surface, the plane surface is plated with a filter film 312, the lens 311 is used for condensing light signals, the filter film layer 312 is used to filter out the light signal of the non-target waveband and pass the light signal of the target waveband; the sensor chip 320 is arranged under the lens assembly 310, and the sensor chip 320 is used to converge according to the lens 311 Light signal for imaging.
  • the sensor chip 320 may also be referred to as an optical fingerprint sensor, a fingerprint sensor, a light sensor, a fingerprint sensor chip, a sensor chip, etc.
  • the filter film layer 312 may be an infrared cut off and/or blue cut off filter film.
  • the target wavelength range may be 400 nm to 650 nm.
  • the target band may also be other bands, or a collection of multiple bands, which is not limited in this application.
  • the filter film layer 312 can be used to filter out undesired light signals and further improve the imaging quality.
  • the filter film layer 312 can be used to filter out ambient light, such as near-infrared light and part of red light.
  • ambient light such as near-infrared light and part of red light.
  • a human finger absorbs most of the energy of light with a wavelength lower than 580nm. If the filter film 312 can be designed to filter light with a wavelength from 580nm to infrared, it can greatly reduce the impact of ambient light on optical detection in fingerprint sensing. influences.
  • the lens 311 includes at least one lens, and the at least one lens includes at least one first lens 313, and the first lens 313 has the plane surface.
  • the object side surface of the first lens 313 is the plane surface.
  • the image side surface of the first lens 313 is the plane surface.
  • the lens 311 includes three lenses, of which the three lenses include a first lens 313, and the image side surface (lower surface) of the first lens 313 is a flat surface, that is, the first lens
  • the image side surface of the lens 313 is coated with the filter film 312.
  • the lens 311 when the lens 311 includes multiple lenses, some or all of the lenses in the lens 311 may be the first lens 313 having the flat surface.
  • first lenses 313 there may be multiple first lenses 313 with the filter film layer 312 on the surface of the lens 311.
  • the filter film 312 coated on the surface of different first lenses 313 may be the same or different.
  • the lens 311 is provided with lens 1, lens 2, and lens 3 in sequence from the object side to the image side
  • the object side surface of lens 1 is coated with filter film layer A
  • the image side surface of lens 3 is coated with filter film layer B.
  • the filter film layer A and the filter film layer B are the same filter film layer.
  • the lens 311 is provided with lens 1, lens 2, and lens 3 in sequence from the object side to the image side.
  • the object side surface of lens 1 is coated with filter film A
  • the image side surface of lens 3 is coated with filter film B.
  • the filter film layer A is used to filter out the light signal in the infrared band
  • the filter film layer B is used to filter out the light signal in the ultraviolet band
  • the lens assembly 310 is coated with multiple filter layers to achieve multi-band filtering.
  • FIG. 6 is only a possible schematic diagram of the optical image acquisition device of the embodiment of the present application.
  • the lens 311 includes three lenses, of which, the image side surface (lower surface) of one lens is a flat surface, that is, the lens 311 has one flat surface, but the embodiment of the present application is not limited to this.
  • the lens 311 may include more or fewer lenses, and the lens 311 may have more planar surfaces.
  • the lens 311 includes at least one lens, and the at least one lens includes at least one second lens 314, and the surface of the second lens 314 is formed with the plane surface.
  • the object side surface or the image side surface of the second lens 314 is filled with a transparent material 315 to form the plane surface on the object side surface or the image side surface of the second lens 314.
  • the refractive index of the transparent material 315 is less than a first threshold.
  • the object side surface or the image side surface of the second lens 314 is curved, that is, it has the function of changing the light path.
  • a layer of transparent material is uniformly coated on the object side surface or the image side surface of the second lens 314 315.
  • the transparent material 315 has the following characteristics: low refractive index, good filling and leveling ability, and a higher level of hardness after curing. After the transparent material 315 is coated and cured, the flat surface is formed on the object side surface or the image side surface of the second lens 314.
  • the lens 311 includes three lenses, of which the three lenses include a second lens 314, and the object side surface (upper surface) of the second lens 314 is filled with a transparent material 315 to
  • the flat surface is formed on the object side surface of the second lens 314, that is, the filter film layer 312 is plated on the flat surface formed by the object side surface of the second lens 314.
  • the lens 311 includes three lenses, wherein the three lenses include a second lens 314, and the image side surface (lower surface) of the second lens 314 is filled with a transparent material 315,
  • the plane surface is formed on the image side surface of the second lens 314, that is, the plane surface formed by the image side surface of the second lens 314 is plated with the filter film layer 312.
  • the lens 311 when the lens 311 includes multiple lenses, some or all of the lenses in the lens 311 may be the second lens 314 formed with the plane surface.
  • the filter film layer 312 coated on the plane surface formed on the different second lenses 314 may be the same or different.
  • the lens 311 is provided with lens 1, lens 2, and lens 3 in order from the object side to the image side, the flat surface formed on the object side surface of the lens 1 is coated with the filter film layer A, and the lens 3 is formed on the image side surface
  • the plane surface is plated with filter film layer B, filter film layer A and filter film layer B are the same filter film layer, when optical signal X passes through filter film layer A, 95% of non-targets can be filtered out Wave band, when the optical signal X passes through the optical filter layer B, 99.9% of the non-target band can be filtered out. That is, the lens 311 is coated with multiple layers of filter film to enhance the filtering effect.
  • the lens 311 is provided with lens 1, lens 2, and lens 3 in order from the object side to the image side.
  • the flat surface formed on the object side surface of the lens 1 is coated with the filter film A and the image side surface of the lens 3
  • the formed plane surface is plated with a filter film layer B.
  • the filter film layer A is used to filter out optical signals in the infrared band
  • the filter film layer B is used to filter out optical signals in the ultraviolet band.
  • the optical signal Y passes through the filter film
  • layer A is used, the infrared band in the optical signal Y can be filtered out, and when the optical signal Y passes through the optical filter layer B, the ultraviolet band in the optical signal Y can be filtered out. That is, the lens 311 is coated with a multi-layer filter film to achieve multi-band filtering.
  • FIG. 7 and FIG. 8 are only a possible schematic diagram of the optical image acquisition device of the embodiment of the present application.
  • the lens 311 includes three lenses, of which, a flat surface is formed on the object side surface (upper surface) of one lens, that is, the lens 311 has one flat surface; in FIG. 8, The lens 311 includes three lenses, of which, a plane surface is formed on the image side surface (lower surface) of one lens, that is, the lens 311 has one plane surface, but the embodiment of the present application is not limited to this.
  • the lens 311 may include more or fewer lenses, and the lens 311 may have more planar surfaces.
  • the filter film layer 312 may be plated on the flat surface by a multilayer coating process.
  • the filter film layer 312 includes but is not limited to at least one of the following functional film layers:
  • AR Antireflection
  • AG anti-glare
  • IRCF infrared cut filter
  • the lens 311 includes the at least one lens, and some or all of the at least one lens is a lens composed of an aspheric injection lens.
  • the thickness of the filter film 312 plated on each planar surface of the lens 311 is less than or equal to 10 ⁇ m.
  • the total thickness of the filter film layer 312 plated on all the planar surfaces of the lens 311 is less than or equal to 20 ⁇ m.
  • the lens 311 is a macro lens.
  • the focal length of the macro lens ranges from 0.4mm to 1.8mm.
  • the lens assembly 310 further includes:
  • the lens barrel 316 is used to fix the lens 311;
  • the lens holder 317 is used to support the lens barrel 316.
  • the lens 311 may be fixed in the lens barrel 316 through an optical glue or a glue dispensing structure, and the lens 311 may also be fixed in the lens barrel 316 through a bracket structure.
  • the lens assembly 310 is a lens assembly in which the lens barrel 316 and the lens holder 317 are integrated.
  • the lens assembly 310 is a lens assembly in which the lens barrel 316 and the lens holder 317 are separated.
  • the lens holder 317 fixes the lens barrel 316 through a glue or dispensing structure, and for example, the lens holder 317 fixes the lens barrel 316 through a threaded structure.
  • the lens barrel 316 is a straight-through lens barrel or a threaded focusing lens barrel.
  • the lens holder 317 may be fixed on the circuit board.
  • the sensor chip 320 may also be fixed on the circuit board.
  • the optical image acquisition device 300 is arranged below the display screen.
  • the lens 311 may specifically be used to condense the light signal reflected by the finger above the display screen and passing through the display screen.
  • the “object side surface” refers to the surface away from the sensor chip 320
  • the “image side surface” refers to the surface close to the sensor chip 320.
  • the filter film layer is plated on at least one plane surface in the lens, so that the influence of the thickness of the base material on the thickness of the filter film layer can be avoided, and the thickness of the filter film layer can be reduced. Furthermore, the thickness of the optical image acquisition device is reduced.
  • an optical filter without the substrate is provided, and the optical coating on the substrate is transplanted to the optical lens with a novel process scheme, which reduces the thickness of the lens and simplifies the assembly process ,cut costs. And provide the structure and process method of the flat surface coating in the lens to eliminate the non-uniformity of the wavelength selectivity of the coating on the curved surface and the influence on the curvature of the lens surface.
  • An embodiment of the present application also provides an electronic device 400.
  • the electronic device 400 may include a display screen 410 and an optical image acquisition device 420.
  • the optical image acquisition device 420 may be the optical image acquisition device in the foregoing embodiment.
  • the image acquisition device 300 is arranged below the display screen 410.
  • the display screen 410 may be the display screen 120 as described in FIG. 1.
  • the display screen 410 has a self-luminous display unit, and the self-luminous display unit may be used as an excitation light source for the optical image acquisition device 420 for fingerprint detection.
  • the units can be implemented by electronic hardware, computer software, or a combination of both, in order to clearly illustrate the interchangeability of hardware and software.
  • the composition and steps of each example have been described generally in terms of function. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.
  • the disclosed system and device may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may also be electrical, mechanical or other forms of connection.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the objectives of the solutions of the embodiments of the present application.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of this application is essentially or the part that contributes to the existing technology, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium It includes several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program code .

Abstract

Provided in the embodiments of the present application are an optical image acquisition apparatus and an electronic device; the thickness of a light filter functional layer is reduced by means of using a substrate-free film coating technique, thereby reducing the thickness of the optical image acquisition apparatus. The optical image acquisition apparatus comprises: a lens assembly comprising a lens, the lens having at least one flat surface, a light filter film layer being coated on the flat surface, the lens being used for converging light signals, and the light filter film layer being used for filtering out light signals of a non-target waveband and letting through light signals of a target waveband; and a sensor chip arranged below the lens assembly, the sensor chip being used for performing imaging on the basis of the light signals converged by the lens.

Description

光学图像采集装置和电子设备Optical image acquisition device and electronic equipment 技术领域Technical field
本申请实施例涉及电子领域，并且更具体地，涉及一种光学图像采集装置和电子设备。The embodiments of the present application relate to the field of electronics, and more specifically, to an optical image acquisition device and electronic equipment.
背景技术Background technique
随着智能终端设备，如手机、平板电脑、智能手表等的拍照和光学指纹功能的普及，对诸如光学摄像头等光学图像采集装置的要求越来越高。光学滤光片用于实现特定波长范围内光通过，是光学摄像头的重要组件之一。传统滤光片通过在基底玻璃的表面镀膜，用于实现滤光作用。然而，传统滤光片的厚度受基底材料如白玻璃、蓝玻璃的强度的限制不能做的太薄，这在很大程度上限制了光学摄像头的厚度。对于诸如光学摄像头等光学图像采集装置，如何在不影响成像质量的情况下，降低滤光片的厚度是一个亟待解决的问题。With the popularization of the camera and optical fingerprint functions of smart terminal devices, such as mobile phones, tablet computers, smart watches, etc., the requirements for optical image collection devices such as optical cameras are getting higher and higher. Optical filters are used to pass light in a specific wavelength range and are one of the important components of optical cameras. The traditional filter is used to achieve the filtering effect by coating the surface of the base glass. However, the thickness of the traditional optical filter is limited by the strength of the base material such as white glass and blue glass and cannot be made too thin, which largely limits the thickness of the optical camera. For optical image acquisition devices such as optical cameras, how to reduce the thickness of the filter without affecting the image quality is an urgent problem to be solved.
发明内容Summary of the invention
本申请实施例提供一种光学图像采集装置和电子设备，能够降低滤光膜层的厚度，从而将光学图像采集装置的厚度减薄。The embodiments of the present application provide an optical image acquisition device and electronic equipment, which can reduce the thickness of the filter film layer, thereby reducing the thickness of the optical image acquisition device.
第一方面，提供了一种光学图像采集装置包括：In a first aspect, an optical image acquisition device is provided, including:
镜头组件，包括镜头，所述镜头具有至少一个平面表面，所述平面表面上镀有滤光膜层，所述镜头用于会聚光信号，所述滤光膜层用于滤掉非目标波段的光信号，透过目标波段的光信号；A lens assembly, including a lens, the lens having at least one plane surface, the plane surface is plated with a filter film layer, the lens is used to converge light signals, the filter film layer is used to filter out non-target wavebands Optical signal, the optical signal passing through the target band;
传感芯片，设置于所述镜头组件下方，所述传感芯片用于根据所述镜头会聚的光信号进行成像。The sensor chip is arranged under the lens assembly, and the sensor chip is used for imaging according to the light signal condensed by the lens.
本申请实施例的光学图像采集装置中，滤光膜层镀在镜头中的至少一个平面表面上，从而可以避免基底材料厚度对滤光膜层厚度的影响，能够降低滤光膜层的厚度，进而将光学图像采集装置的厚度减薄，同时减少了工艺流程，简化了装配难度，达到了降低成本的目的。In the optical image acquisition device of the embodiment of the present application, the filter film layer is plated on at least one plane surface in the lens, so that the influence of the thickness of the base material on the thickness of the filter film layer can be avoided, and the thickness of the filter film layer can be reduced. Furthermore, the thickness of the optical image acquisition device is reduced, the process flow is reduced, the assembly difficulty is simplified, and the cost reduction is achieved.
在一些可能的实现方式中，所述镜头包括至少一片透镜，所述至少一片透镜包括至少一片第一透镜，所述第一透镜具有所述平面表面。In some possible implementation manners, the lens includes at least one lens, the at least one lens includes at least one first lens, and the first lens has the plane surface.
在一些可能的实现方式中，所述镜头包括至少一片透镜，所述至少一片透镜包括至少一片第二透镜，所述第二透镜表面形成有所述平面表面。In some possible implementations, the lens includes at least one lens, the at least one lens includes at least one second lens, and the second lens surface is formed with the plane surface.
在一些可能的实现方式中，所述第二透镜的物侧表面或者像侧表面上填充有透明材料，以在所述第二透镜的物侧表面或者像侧表面形成所述平面表面。In some possible implementations, the object side surface or the image side surface of the second lens is filled with a transparent material to form the plane surface on the object side surface or the image side surface of the second lens.
在一些可能的实现方式中，所述透明材料的折射率小于第一阈值。In some possible implementations, the refractive index of the transparent material is less than a first threshold.
在一些可能的实现方式中，所述至少一片透镜中的部分或者全部透镜为由非球面注塑镜片组成的透镜。In some possible implementation manners, part or all of the at least one lens is a lens composed of aspheric injection lenses.
在一些可能的实现方式中，所述镜头中的每个平面表面上所镀的所述滤光膜层的厚度小于或者等于10μm。In some possible implementation manners, the thickness of the filter film layer plated on each plane surface of the lens is less than or equal to 10 μm.
在一些可能的实现方式中，所述镜头中的所有平面表面上所镀的所述滤光膜层的总厚度小于或者等于20μm。In some possible implementation manners, the total thickness of the filter film layer plated on all plane surfaces in the lens is less than or equal to 20 μm.
在一些可能的实现方式中，所述滤光膜层包括以下功能膜层中的至少一种：In some possible implementation manners, the filter film layer includes at least one of the following functional film layers:
抗反射层、疏油层、防眩光层、红外截止滤光层。Anti-reflective layer, oleophobic layer, anti-glare layer, infrared cut filter layer.
在一些可能的实现方式中，所述镜头为微距镜头。In some possible implementations, the lens is a macro lens.
在一些可能的实现方式中，所述微距镜头的焦距范围为0.4mm～1.8mm。In some possible implementation manners, the focal length of the macro lens ranges from 0.4 mm to 1.8 mm.
在一些可能的实现方式中，所述镜头组件还包括：In some possible implementation manners, the lens assembly further includes:
镜筒，用于固定所述镜头；Lens barrel for fixing the lens;
镜座，用于支撑所述镜筒。The lens holder is used to support the lens barrel.
在一些可能的实现方式中，所述镜头组件为镜筒与镜座一体式的镜头组件。In some possible implementations, the lens assembly is a lens assembly in which a lens barrel and a lens holder are integrated.
在一些可能的实现方式中，所述镜头组件为镜筒与镜座分离式的镜头组件。In some possible implementations, the lens assembly is a lens assembly in which the lens barrel and the lens holder are separated.
在一些可能的实现方式中，所述镜筒为直通式镜筒或者螺纹调焦式镜筒。In some possible implementation manners, the lens barrel is a straight-through lens barrel or a threaded focusing lens barrel.
在一些可能的实现方式中，所述目标波段范围为400nm～650nm。In some possible implementation manners, the target wavelength range is 400 nm to 650 nm.
在一些可能的实现方式中，所述光学图像采集装置设置于显示屏下方。In some possible implementations, the optical image acquisition device is arranged below the display screen.
在一些可能的实现方式中，所述镜头具体用于会聚光线照射到所述显示屏上方的手指反射回来的并穿过所述显示屏的光信号。In some possible implementation manners, the lens is specifically configured to condense the light signal reflected by the finger above the display screen and passing through the display screen.
第二方面，提供了一种电子设备，包括：显示屏以及In a second aspect, an electronic device is provided, including: a display screen and
第一方面或第一方面的任意可能的实现方式中的光学图像采集装置，其 中，所述光学图像采集装置设置于所述显示屏下方。The first aspect or the optical image acquisition device in any possible implementation of the first aspect, wherein the optical image acquisition device is disposed under the display screen.
附图说明Description of the drawings
图1是本申请实施例所适用的电子设备的结构示意图。FIG. 1 is a schematic structural diagram of an electronic device to which an embodiment of the present application is applied.
图2是一种光学图像采集装置的结构示意图。Figure 2 is a schematic structural diagram of an optical image acquisition device.
图3是透镜弧度表面镀膜时透镜失焦的示意图。Figure 3 is a schematic diagram of the lens out of focus when the curved surface of the lens is coated.
图4是透镜弧度表面镀膜时不同位置入射光的入射角度变化示意图。Fig. 4 is a schematic diagram showing the change of the incident angle of incident light at different positions when the curved surface of the lens is coated.
图5是透镜弧度表面镀膜时不同角度入射光的分光透过率示意图。Figure 5 is a schematic diagram of the spectral transmittance of incident light at different angles when the curved surface of the lens is coated.
图6是根据本申请一实施例的光学图像采集装置的结构示意图。Fig. 6 is a schematic structural diagram of an optical image acquisition device according to an embodiment of the present application.
图7是根据本申请另一实施例的光学图像采集装置的结构示意图。Fig. 7 is a schematic structural diagram of an optical image acquisition device according to another embodiment of the present application.
图8是根据本申请再一实施例的光学图像采集装置的结构示意图。Fig. 8 is a schematic structural diagram of an optical image acquisition device according to still another embodiment of the present application.
图9是本申请实施例的电子设备的示意性框图。Fig. 9 is a schematic block diagram of an electronic device according to an embodiment of the present application.
具体实施方式Detailed ways
下面将结合附图，对本申请实施例中的技术方案进行描述。The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings.
应理解，本申请实施例可以应用于光学指纹***，包括但不限于光学指纹识别***和基于光学指纹成像的医疗诊断产品，本申请实施例仅以光学指纹***为例进行说明，但不应对本申请实施例构成任何限定，本申请实施例同样适用于其他采用光学成像技术的***等。It should be understood that the embodiments of this application can be applied to optical fingerprint systems, including but not limited to optical fingerprint identification systems and medical diagnostic products based on optical fingerprint imaging. The embodiments of this application only take optical fingerprint systems as an example for description, but should not The embodiments of the application constitute any limitation, and the embodiments of the present application are also applicable to other systems using optical imaging technology.
作为一种常见的应用场景，本申请实施例提供的光学指纹***可以应用在智能手机、平板电脑以及其他具有显示屏的移动终端或者其他终端设备；更具体地，在上述终端设备中，指纹识别装置可以具体为光学指纹装置，其可以设置在显示屏下方的局部区域或者全部区域，从而形成屏下(Under-display)光学指纹***。或者，所述指纹识别装置也可以部分或者全部集成至所述终端设备的显示屏内部，从而形成屏内(In-display)光学指纹***。As a common application scenario, the optical fingerprint system provided in the embodiments of this application can be applied to smart phones, tablet computers, and other mobile terminals with display screens or other terminal devices; more specifically, in the above-mentioned terminal devices, fingerprint identification The device may specifically be an optical fingerprint device, which may be arranged in a partial area or an entire area under the display screen, thereby forming an under-display optical fingerprint system. Alternatively, the fingerprint identification device can also be partially or fully integrated into the display screen of the terminal device, thereby forming an in-display optical fingerprint system.
如图1所示为本申请实施例可以适用的终端设备的结构示意图，所述终端设备10包括显示屏120和光学指纹装置130，其中，所述光学指纹装置130设置在所述显示屏120下方的局部区域。所述光学指纹装置130包括光学指纹传感器，所述光学指纹传感器包括具有多个光学感应单元131的感应阵列133，所述感应阵列所在区域或者其感应区域为所述光学指纹装置130 的指纹检测区域103。如图1所示，所述指纹检测区域103位于所述显示屏120的显示区域之中。在一种替代实施例中，所述光学指纹装置130还可以设置在其他位置，比如所述显示屏120的侧面或者所述终端设备10的边缘非透光区域，并通过光路设计来将所述显示屏120的至少部分显示区域的光信号导引到所述光学指纹装置130，从而使得所述指纹检测区域103实际上位于所述显示屏120的显示区域。As shown in FIG. 1 is a schematic structural diagram of a terminal device to which the embodiment of the application can be applied. The terminal device 10 includes a display screen 120 and an optical fingerprint device 130, wherein the optical fingerprint device 130 is disposed under the display screen 120 Local area. The optical fingerprint device 130 includes an optical fingerprint sensor, and the optical fingerprint sensor includes a sensing array 133 having a plurality of optical sensing units 131, and the area where the sensing array is located or its sensing area is the fingerprint detection area of the optical fingerprint device 130 103. As shown in FIG. 1, the fingerprint detection area 103 is located in the display area of the display screen 120. In an alternative embodiment, the optical fingerprint device 130 may also be arranged in other positions, such as the side of the display screen 120 or the non-transparent area of the edge of the terminal device 10, and the optical fingerprint device 130 may be designed to The optical signal of at least a part of the display area of the display screen 120 is guided to the optical fingerprint device 130, so that the fingerprint detection area 103 is actually located in the display area of the display screen 120.
应当理解，所述指纹检测区域103的面积可以与所述光学指纹装置130的感应阵列的面积不同，例如通过例如透镜成像的光路设计、反射式折叠光路设计或者其他光线汇聚或者反射等光路设计，可以使得所述光学指纹装置130的指纹检测区域103的面积大于所述光学指纹装置130感应阵列的面积。在其他替代实现方式中，如果采用例如光线准直方式进行光路引导，所述光学指纹装置130的指纹检测区域103也可以设计成与所述光学指纹装置130的感应阵列的面积基本一致。It should be understood that the area of the fingerprint detection area 103 may be different from the area of the sensing array of the optical fingerprint device 130, for example, through optical path design such as lens imaging, reflective folding optical path design, or other optical path design such as light convergence or reflection, etc. The area of the fingerprint detection area 103 of the optical fingerprint device 130 can be made larger than the area of the sensing array of the optical fingerprint device 130. In other alternative implementations, if for example, light collimation is used for light path guidance, the fingerprint detection area 103 of the optical fingerprint device 130 may also be designed to be substantially the same as the area of the sensing array of the optical fingerprint device 130.
因此，使用者在需要对所述终端设备进行解锁或者其他指纹验证的时候，只需要将手指按压在位于所述显示屏120的指纹检测区域103，便可以实现指纹输入。由于指纹检测可以在屏内实现，因此采用上述结构的终端设备10无需其正面专门预留空间来设置指纹按键(比如Home键)，从而可以采用全面屏方案，即所述显示屏120的显示区域可以基本扩展到整个终端设备10的正面。Therefore, when the user needs to unlock the terminal device or perform other fingerprint verification, he only needs to press his finger on the fingerprint detection area 103 located in the display screen 120 to realize fingerprint input. Since fingerprint detection can be implemented in the screen, the terminal device 10 adopting the above structure does not need to reserve a space on the front side for the fingerprint button (such as the Home button), so that a full screen solution can be adopted, that is, the display area of the display screen 120 It can be basically extended to the front of the entire terminal device 10.
作为一种可选的实现方式，如图1所示，所述光学指纹装置130包括光检测部分134和光学组件132，所述光检测部分134包括所述感应阵列以及与所述感应阵列电性连接的读取电路及其他辅助电路，其可以在通过半导体工艺制作在一个芯片(Die)，比如光学成像芯片或者光学指纹传感器，所述感应阵列具体为光探测器(Photodetector)阵列，其包括多个呈阵列式分布的光探测器，所述光探测器可以作为如上所述的光学感应单元。As an optional implementation, as shown in FIG. 1, the optical fingerprint device 130 includes a light detecting part 134 and an optical component 132, and the light detecting part 134 includes the sensor array and is electrically connected to the sensor array. The connected reading circuit and other auxiliary circuits can be fabricated on a chip (Die) by a semiconductor process, such as an optical imaging chip or an optical fingerprint sensor. The sensing array is specifically a photodetector (Photodetector) array, which includes multiple There are two photodetectors distributed in an array, and the photodetectors can be used as the above-mentioned optical sensing unit.
所述光学组件132可以设置在所述光检测部分134的感应阵列的上方，其可以具体包括滤光层(Filter)、导光层或光路引导结构以及其他光学元件，所述滤光层可以用于滤除穿透手指的环境光，而所述导光层或光路引导结构主要用于从手指表面反射回来的反射光导引至所述感应阵列进行光学检测。The optical component 132 may be disposed above the sensing array of the light detecting part 134, which may specifically include a filter layer (Filter), a light guide layer or a light path guiding structure, and other optical elements. The filter layer may be used In order to filter out the ambient light penetrating the finger, the light guide layer or light path guiding structure is mainly used to guide the reflected light reflected from the finger surface to the sensor array for optical detection.
在具体实现上，所述光学组件132可以与所述光检测部分134封装在同一个光学指纹部件。比如，所述光学组件132可以与所述光学检测部分134 封装在同一个光学指纹芯片，也可以将所述光学组件132设置在所述光检测部分134所在的芯片外部，比如将所述光学组件132贴合在所述芯片上方，或者将所述光学组件132的部分元件集成在上述芯片之中。In terms of specific implementation, the optical assembly 132 and the light detecting part 134 may be packaged in the same optical fingerprint component. For example, the optical component 132 and the optical detection part 134 can be packaged in the same optical fingerprint chip, or the optical component 132 can be arranged outside the chip where the optical detection part 134 is located, for example, the optical component 132 is attached above the chip, or some components of the optical assembly 132 are integrated into the chip.
其中，所述光学组件132的导光层或者光路引导结构有多种实现方案，比如，所述导光层可以具体为在半导体硅片制作而成的准直器(Collimator)层，其具有多个准直单元或者微孔阵列，所述准直单元可以具体为小孔，从手指反射回来的反射光中，垂直入射到所述准直单元的光线可以穿过并被其下方的光学感应单元接收，而入射角度过大的光线在所述准直单元内部经过多次反射被衰减掉，因此每一个光学感应单元基本只能接收到其正上方的指纹纹路反射回来的反射光，从而所述感应阵列便可以检测出手指的指纹图像。Wherein, the light guide layer or light path guiding structure of the optical component 132 has multiple implementation schemes. For example, the light guide layer may specifically be a collimator layer made on a semiconductor silicon wafer, which has multiple A collimating unit or a micro-hole array. The collimating unit can be specifically a small hole. Among the reflected light reflected from the finger, the light that is perpendicularly incident on the collimating unit can pass through and be passed by the optical sensing unit below it. The light with an excessively large incident angle is attenuated by multiple reflections inside the collimating unit. Therefore, each optical sensing unit can basically only receive the reflected light reflected by the fingerprint pattern directly above it. The sensor array can detect the fingerprint image of the finger.
在另一种实施例中，所述导光层或者光路引导结构也可以为光学透镜(Lens)层，其具有一个或多个透镜单元，比如一个或多个非球面透镜组成的透镜组，其用于将从手指反射回来的反射光汇聚到其下方的光检测部分134的感应阵列，以使得所述感应阵列可以基于所述反射光进行成像，从而得到所述手指的指纹图像。可选地，所述光学透镜层在所述透镜单元的光路中还可以形成有针孔，所述针孔可以配合所述光学透镜层扩大所述光学指纹装置的视场，以提高所述光学指纹装置130的指纹成像效果。In another embodiment, the light guide layer or the light path guide structure may also be an optical lens (Lens) layer, which has one or more lens units, such as a lens group composed of one or more aspheric lenses, which The sensing array used to converge the reflected light reflected from the finger to the light detection part 134 below it, so that the sensing array can perform imaging based on the reflected light, thereby obtaining a fingerprint image of the finger. Optionally, the optical lens layer may further have a pinhole formed in the optical path of the lens unit, and the pinhole may cooperate with the optical lens layer to expand the field of view of the optical fingerprint device to improve the optical The fingerprint imaging effect of the fingerprint device 130.
在其他实施例中，所述导光层或者光路引导结构也可以具体采用微透镜(Micro-Lens)层，所述微透镜层具有由多个微透镜形成的微透镜阵列，其可以通过半导体生长工艺或者其他工艺形成在所述光检测部分134的感应阵列上方，并且每一个微透镜可以分别对应于所述感应阵列的其中一个感应单元。并且，所述微透镜层和所述感应单元之间还可以形成其他光学膜层，比如介质层或者钝化层，更具体地，所述微透镜层和所述感应单元之间还可以包括具有微孔的挡光层，其中所述微孔形成在其对应的微透镜和感应单元之间，所述挡光层可以阻挡相邻微透镜和感应单元之间的光学干扰，并使得所述感应单元所对应的光线通过所述微透镜汇聚到所述微孔内部并经由所述微孔传输到所述感应单元以进行光学指纹成像。In other embodiments, the light guide layer or the light path guide structure may also specifically adopt a micro-lens (Micro-Lens) layer. The micro-lens layer has a micro-lens array formed by a plurality of micro-lenses, which can be grown by semiconductors. A process or other processes are formed above the sensing array of the light detecting part 134, and each microlens may correspond to one of the sensing units of the sensing array. Moreover, other optical film layers may be formed between the microlens layer and the sensing unit, such as a dielectric layer or a passivation layer. More specifically, the microlens layer and the sensing unit may also include The light-blocking layer of the micro-hole, wherein the micro-hole is formed between the corresponding micro-lens and the sensing unit, the light-blocking layer can block the optical interference between the adjacent micro-lens and the sensing unit, and make the sensing The light corresponding to the unit is condensed into the microhole through the microlens and is transmitted to the sensing unit through the microhole to perform optical fingerprint imaging.
应当理解，上述光路引导结构的几种实现方案可以单独使用也可以结合使用，比如，可以在所述准直器层或者所述光学透镜层下方进一步设置微透镜层。当然，在所述准直器层或者所述光学透镜层与所述微透镜层结合使用时，其具体叠层结构或者光路可能需要按照实际需要进行调整。It should be understood that several implementation solutions of the above-mentioned optical path guiding structure can be used alone or in combination. For example, a microlens layer can be further provided under the collimator layer or the optical lens layer. Of course, when the collimator layer or the optical lens layer is used in combination with the micro lens layer, its specific laminated structure or optical path may need to be adjusted according to actual needs.
作为一种可选的实施例，所述显示屏120可以采用具有自发光显示单元的显示屏，比如有机发光二极管(Organic Light-Emitting Diode，OLED)显示屏或者微型发光二极管(Micro-LED)显示屏。以采用OLED显示屏为例，所述光学指纹装置130可以利用所述OLED显示屏120位于所述指纹检测区域103的显示单元(即OLED光源)来作为光学指纹检测的激励光源。当手指140按压在所述指纹检测区域103时，显示屏120向所述指纹检测区域103上方的目标手指140发出一束光111，该光111在手指140的表面发生反射形成反射光或者经过所述手指140内部散射而形成散射光，在相关专利申请中，为便于描述，上述反射光和散射光统称为反射光。由于指纹的嵴(ridge)与峪(vally)对于光的反射能力不同，因此，来自指纹嵴的反射光151和来自指纹峪的反射光152具有不同的光强，反射光经过光学组件132后，被光学指纹装置130中的感应阵列134所接收并转换为相应的电信号，即指纹检测信号；基于所述指纹检测信号便可以获得指纹图像数据，并且可以进一步进行指纹匹配验证，从而在所述终端设备10实现光学指纹识别功能。As an optional embodiment, the display screen 120 may be a display screen with a self-luminous display unit, such as an organic light-emitting diode (Organic Light-Emitting Diode, OLED) display or a micro-LED (Micro-LED) display Screen. Taking an OLED display screen as an example, the optical fingerprint device 130 may use the display unit (ie, an OLED light source) of the OLED display screen 120 located in the fingerprint detection area 103 as an excitation light source for optical fingerprint detection. When the finger 140 is pressed against the fingerprint detection area 103, the display screen 120 emits a beam of light 111 to the target finger 140 above the fingerprint detection area 103. The light 111 is reflected on the surface of the finger 140 to form reflected light or pass through all the fingers. The finger 140 scatters to form scattered light. In related patent applications, for ease of description, the above-mentioned reflected light and scattered light are collectively referred to as reflected light. Because fingerprint ridges and valleys have different light reflection capabilities, the reflected light 151 from the fingerprint ridge and the reflected light 152 from the fingerprint ridge have different light intensities. After the reflected light passes through the optical component 132, It is received by the sensor array 134 in the optical fingerprint device 130 and converted into a corresponding electrical signal, that is, a fingerprint detection signal; based on the fingerprint detection signal, fingerprint image data can be obtained, and fingerprint matching verification can be further performed, so that the The terminal device 10 implements an optical fingerprint recognition function.
在其他实施例中，所述光学指纹装置130也可以采用内置光源或者外置光源来提供用于进行指纹检测的光信号。在这种情况下，所述光学指纹装置130可以适用于非自发光显示屏，比如液晶显示屏或者其他的被动发光显示屏。以应用在具有背光模组和液晶面板的液晶显示屏为例，为支持液晶显示屏的屏下指纹检测，所述终端设备10的光学指纹***还可以包括用于光学指纹检测的激励光源，所述激励光源可以具体为红外光源或者特定波长非可见光的光源，其可以设置在所述液晶显示屏的背光模组下方或者设置在所述终端设备10的保护盖板下方的边缘区域，而所述光学指纹装置130可以设置液晶面板或者保护盖板的边缘区域下方并通过光路引导以使得指纹检测光可以到达所述光学指纹装置130；或者，所述光学指纹装置130也可以设置在所述背光模组下方，且所述背光模组通过对扩散片、增亮片、反射片等膜层进行开孔或者其他光学设计以允许指纹检测光穿过液晶面板和背光模组并到达所述光学指纹装置130。当采用所述光学指纹装置130采用内置光源或者外置光源来提供用于进行指纹检测的光信号时，其检测原理与上面描述内容是一致的。In other embodiments, the optical fingerprint device 130 may also use a built-in light source or an external light source to provide an optical signal for fingerprint detection. In this case, the optical fingerprint device 130 may be suitable for non-self-luminous display screens, such as liquid crystal display screens or other passively-luminous display screens. Taking a liquid crystal display with a backlight module and a liquid crystal panel as an example, in order to support the under-screen fingerprint detection of the liquid crystal display, the optical fingerprint system of the terminal device 10 may also include an excitation light source for optical fingerprint detection. The excitation light source may specifically be an infrared light source or a light source of invisible light of a specific wavelength, which may be arranged under the backlight module of the liquid crystal display or arranged in the edge area under the protective cover of the terminal device 10, and the The optical fingerprint device 130 can be arranged under the edge area of the liquid crystal panel or the protective cover and guided by the light path so that the fingerprint detection light can reach the optical fingerprint device 130; or, the optical fingerprint device 130 can also be arranged in the backlight module. Under the group, and the backlight module is designed to allow the fingerprint detection light to pass through the liquid crystal panel and the backlight module and reach the optical fingerprint device 130 through openings or other optical designs on the film layers such as diffuser, brightness enhancement film, and reflective film. . When the optical fingerprint device 130 adopts a built-in light source or an external light source to provide an optical signal for fingerprint detection, the detection principle is the same as that described above.
应当理解的是，在具体实现上，所述终端设备10还包括透明保护盖板，所述盖板可以为玻璃盖板或者蓝宝石盖板，其位于所述显示屏120的上方并 覆盖所述终端设备10的正面。因为，本申请实施例中，所谓的手指按压在所述显示屏120实际上是指按压在所述显示屏120上方的盖板或者覆盖所述盖板的保护层表面。It should be understood that, in specific implementation, the terminal device 10 further includes a transparent protective cover, and the cover may be a glass cover or a sapphire cover, which is located above the display screen 120 and covers the terminal. The front of the device 10. Because, in the embodiment of the present application, the so-called finger pressing on the display screen 120 actually refers to pressing on the cover plate above the display screen 120 or covering the surface of the protective layer of the cover plate.
另一方面，在某些实施例中，所述光学指纹装置130可以具体包括多个光学指纹传感器；所述多个光学指纹传感器可以通过拼接方式并排设置在所述显示屏120的下方，且所述多个光学指纹传感器的感应区域共同构成所述光学指纹装置130的指纹检测区域103。也即是说，所述光学指纹装置130的指纹检测区域103可以包括多个子区域，每个子区域分别对应于其中一个光学指纹传感器的感应区域，从而将所述光学指纹模组130的指纹采集区域103可以扩展到所述显示屏的下半部分的主要区域，即扩展到手指惯常按压区域，从而实现盲按式指纹输入操作。可替代地，当所述光学指纹传感器数量足够时，所述指纹检测区域130还可以扩展到半个显示区域甚至整个显示区域，从而实现半屏或者全屏指纹检测。On the other hand, in some embodiments, the optical fingerprint device 130 may specifically include a plurality of optical fingerprint sensors; the plurality of optical fingerprint sensors may be arranged side by side under the display screen 120 in a splicing manner, and The sensing areas of the multiple optical fingerprint sensors collectively constitute the fingerprint detection area 103 of the optical fingerprint device 130. In other words, the fingerprint detection area 103 of the optical fingerprint device 130 may include multiple sub-areas, and each sub-area corresponds to the sensing area of one of the optical fingerprint sensors, so that the fingerprint collection area of the optical fingerprint module 130 103 can be extended to the main area of the lower half of the display screen, that is, to the area where the finger is habitually pressed, so as to realize the blind fingerprint input operation. Alternatively, when the number of optical fingerprint sensors is sufficient, the fingerprint detection area 130 can also be extended to half of the display area or even the entire display area, thereby realizing half-screen or full-screen fingerprint detection.
在目前的技术方案中，如图2所示，光学图像采集装置200包括镜头210、镜筒220、镜座230、滤光片240、传感芯片250和电路板260。In the current technical solution, as shown in FIG. 2, the optical image acquisition device 200 includes a lens 210, a lens barrel 220, a lens holder 230, a filter 240, a sensor chip 250 and a circuit board 260.
具体地，如图2所示，镜头210可以包括至少一片镜片，镜筒220用于固定镜头210，镜座230用于支撑镜筒220，滤光片240设置于镜筒220内的镜头210下方，镜座230和传感芯片250设置于电路板260的上方。滤光片240是通过在诸如白玻璃、蓝玻璃等基底材料的表面镀膜，通过不同的材料的反射达到对特定波长光截止同时特定波长的光通过的滤光作用。Specifically, as shown in FIG. 2, the lens 210 may include at least one lens, the lens barrel 220 is used to fix the lens 210, the lens holder 230 is used to support the lens barrel 220, and the filter 240 is disposed under the lens 210 in the lens barrel 220. , The mirror base 230 and the sensor chip 250 are disposed above the circuit board 260. The filter 240 is formed by coating the surface of a base material such as white glass, blue glass, etc., through the reflection of different materials to cut off light of a specific wavelength while passing light of a specific wavelength.
然而，滤光片240的厚度受基底材料的强度的限制不能做的太薄，从而限制了光学图像采集装置200厚度。However, the thickness of the filter 240 is limited by the strength of the base material and cannot be made too thin, which limits the thickness of the optical image pickup device 200.
在某些实施例中，在镜片211具有弧度图案的一面镀膜212。其中膜212可以实现增透、滤光等作用。In some embodiments, a film 212 is coated on one side of the lens 211 with a curved pattern. The film 212 can realize the functions of anti-reflection, light filtering and the like.
如图3所示，在镜片211表面镀膜212后，当光线In从镜片211的一个面入射进入镜片211，经过镜片211材料的弧形表面而汇聚在F2，其中F2就是镜片211基础材料的焦距，F2的大小受镜片211材料折射率n1和空气折射率n2的差异，和镜片211本身的曲率半径的影响而决定。当镜片211表面有镀膜时，光线在镜片211镀膜层内部会发生折射，这里折射的光线路径受镜片211材料折射率n1和镀膜膜材的折射率n3影响而变化，当光线传播到膜212和空气的界面的时候会再次发生折射现象，最终和镜片211中心 法线的交点就是F1。这里F1和F2由于镀膜的参与而无法重合。也就是说，在镜片具有弧度图案的一面镀膜会改变此镜片的焦距。As shown in Figure 3, after coating 212 on the surface of the lens 211, when light In enters the lens 211 from one surface of the lens 211, it passes through the curved surface of the lens 211 material and converges at F2, where F2 is the focal length of the base material of the lens 211 The size of F2 is determined by the difference between the refractive index n1 of the material of the lens 211 and the refractive index n2 of the air, and the influence of the radius of curvature of the lens 211 itself. When the surface of the lens 211 is coated, the light will be refracted inside the coating layer of the lens 211, where the refracted light path is affected by the refractive index n1 of the lens 211 material and the refractive index n3 of the coating film. When the light travels to the film 212 and Refraction will occur again at the interface of the air, and finally the intersection point with the center normal of the lens 211 is F1. Here F1 and F2 cannot overlap due to the participation of coating. In other words, coating on the side of the lens with a curved pattern will change the focal length of the lens.
如图4所示，在镜片211表面镀膜212后，当光线I1，I2，I3在镜片211曲率表面的不同位置入射时，经过膜212折射后，出射光线O1，O2和O3汇聚于F1点。由于O1～O3的出射光路在镜片211表面的不同位置入射，对应的光路在镜片211表面膜212的入射角度不一样。其中，I1和法线重合，其在膜212表面的入射角度为θ1＝0，I2和膜212表面的入射角度是θ2，I3在膜212表面的入射角度为θ3，这里θ3>θ2>θ1。As shown in FIG. 4, after the surface of the lens 211 is coated with a film 212, when light rays I1, I2, and I3 are incident at different positions of the curvature surface of the lens 211, after being refracted by the film 212, the outgoing rays O1, O2, and O3 converge at the point F1. Since the exit light paths of O1 to O3 are incident at different positions on the surface of the lens 211, the incident angle of the corresponding light path on the surface of the lens 211 is different. Wherein, I1 coincides with the normal, the incident angle on the surface of the film 212 is θ1=0, the incident angle of I2 and the surface of the film 212 is θ2, and the incident angle of I3 on the surface of the film 212 is θ3, where θ3>θ2>θ1.
如图5所示，ζ1对应的θ1的入射光的分光曲线，其截止半波长是λ1，透过率数据是T1；ζ2是入射角度是θ2的曲线，其对应的截止半波长是λ2，透过率数据是T2；ζ3是入射角度是θ3的曲线，其对应的截止半波长是λ3，透过率数据是T3；其中角度θ越大，对应的截止半波长数值越小，即λ3<λ2<λ1，同时透过率的数据也会出现入射角度越大，透过率越低，即T3<T2<T1。As shown in Figure 5, ζ1 corresponds to the spectroscopic curve of the incident light of θ1, its cut-off half-wavelength is λ1, and the transmittance data is T1; ζ2 is the curve with an incident angle of θ2, and its corresponding cut-off half-wavelength is λ2. The overrate data is T2; ζ3 is the curve whose incident angle is θ3, the corresponding cut-off half-wavelength is λ3, and the transmittance data is T3; the larger the angle θ, the smaller the corresponding cut-off half-wavelength value, that is, λ3<λ2 <λ1, and the transmittance data will also show that the larger the incident angle, the lower the transmittance, that is, T3<T2<T1.
综上所示，在镜片曲面镀膜会导致镜片曲率半径变化，同时会导致在不同位置入射光的透过率和截止波长发生偏移。对于镜头的影响是失焦和中心边缘明暗不同的问题。In summary, coating on the curved surface of the lens will cause the radius of curvature of the lens to change, and at the same time cause the transmittance and cutoff wavelength of incident light to shift at different positions. The impact on the lens is the problem of defocusing and the difference in brightness at the center edge.
基于上述技术问题，本申请提出一种光学图像采集装置，在光学图像采集装置中，提供了一种省去基材的光学滤光片，将基材上的光学镀膜用新颖的工艺方案移植到光学镜片上，降低了镜头组厚度，简化装配工艺，降低成本。以及提供在镜头组件中的平面表面镀膜的结构及工艺方法，消除在弯曲表面镀膜对波长选择性的不均匀性和对镜头表面曲率的影响。Based on the above technical problems, this application proposes an optical image acquisition device. In the optical image acquisition device, an optical filter that omits the substrate is provided, and the optical coating on the substrate is transplanted to On the optical lens, the thickness of the lens group is reduced, the assembly process is simplified, and the cost is reduced. It also provides a structure and process method for coating the flat surface in the lens assembly to eliminate the non-uniformity of the wavelength selectivity of the coating on the curved surface and the influence on the curvature of the lens surface.
图6示出了本申请实施例的光学图像采集装置300的示意图。应理解，本申请实施例中，该光学图像采集装置300可以为指纹识别模组，对应于图1中的光学指纹识别装置130，或者，该光学图像采集装置300也可以为包括指纹识别模组的电子设备，本申请实施例对此不作限定。FIG. 6 shows a schematic diagram of an optical image acquisition device 300 according to an embodiment of the present application. It should be understood that, in the embodiment of the present application, the optical image acquisition device 300 may be a fingerprint recognition module, which corresponds to the optical fingerprint recognition device 130 in FIG. 1, or the optical image acquisition device 300 may also include a fingerprint recognition module The electronic device of this application does not limit this.
如图6所示，光学图像采集装置300可以包括：镜头组件310和传感芯片320。其中，所述镜头组件310包括镜头311，所述镜头311具有至少一个平面表面，所述平面表面上镀有滤光膜层312，所述镜头311用于会聚光信号，所述滤光膜层312用于滤掉非目标波段的光信号，透过目标波段的光信号；所述传感芯片320设置于所述镜头组件310下方，所述传感芯片320用于根据所述镜头311会聚的光信号进行成像。As shown in FIG. 6, the optical image acquisition device 300 may include: a lens assembly 310 and a sensor chip 320. Wherein, the lens assembly 310 includes a lens 311, the lens 311 has at least one plane surface, the plane surface is plated with a filter film 312, the lens 311 is used for condensing light signals, the filter film layer 312 is used to filter out the light signal of the non-target waveband and pass the light signal of the target waveband; the sensor chip 320 is arranged under the lens assembly 310, and the sensor chip 320 is used to converge according to the lens 311 Light signal for imaging.
本申请实施例中，传感芯片320也可以称为光学指纹传感器、指纹传感器、光传感器、指纹传感器芯片、传感器芯片等。In the embodiments of the present application, the sensor chip 320 may also be referred to as an optical fingerprint sensor, a fingerprint sensor, a light sensor, a fingerprint sensor chip, a sensor chip, etc.
需要说明的是，所述镜头311中的平面表面起不到改变光路的作用。It should be noted that the flat surface in the lens 311 cannot change the light path.
可选地，所述滤光膜层312可以是红外截止和/或蓝光截止滤光膜。Optionally, the filter film layer 312 may be an infrared cut off and/or blue cut off filter film.
可选地，所述目标波段范围可以为400nm～650nm。当然，所述目标波段也可以是其他波段，或者，多个波段的集合，本申请对此不作限定。Optionally, the target wavelength range may be 400 nm to 650 nm. Of course, the target band may also be other bands, or a collection of multiple bands, which is not limited in this application.
滤光膜层312可以用于滤掉不期望的光信号，进一步提升成像质量。The filter film layer 312 can be used to filter out undesired light signals and further improve the imaging quality.
例如，滤光膜层312可以用于过滤掉环境光，如近红外光和部分的红光等。例如，人类手指吸收波长低于580nm的光的能量中的大部分，如果滤光膜层312可以设计为过滤波长从580nm至红外的光，则可以大大减少环境光对指纹感应中的光学检测的影响。For example, the filter film layer 312 can be used to filter out ambient light, such as near-infrared light and part of red light. For example, a human finger absorbs most of the energy of light with a wavelength lower than 580nm. If the filter film 312 can be designed to filter light with a wavelength from 580nm to infrared, it can greatly reduce the impact of ambient light on optical detection in fingerprint sensing. influences.
可选地，在本申请实施例中，所述镜头311包括至少一片透镜，所述至少一片透镜包括至少一片第一透镜313，所述第一透镜313具有所述平面表面。Optionally, in the embodiment of the present application, the lens 311 includes at least one lens, and the at least one lens includes at least one first lens 313, and the first lens 313 has the plane surface.
例如，所述第一透镜313的物侧表面为所述平面表面。For example, the object side surface of the first lens 313 is the plane surface.
又例如，所述第一透镜313的像侧表面为所述平面表面。For another example, the image side surface of the first lens 313 is the plane surface.
如图6所示，所述镜头311包括3片透镜，其中，3片透镜包括一片第一透镜313，以及第一透镜313的像侧表面(下表面)为平面表面，也即所述第一透镜313的像侧表面镀有所述滤光膜层312。As shown in FIG. 6, the lens 311 includes three lenses, of which the three lenses include a first lens 313, and the image side surface (lower surface) of the first lens 313 is a flat surface, that is, the first lens The image side surface of the lens 313 is coated with the filter film 312.
可选地，在所述镜头311包括多片透镜的情况下，所述镜头311中的部分或者全部透镜可以为具有所述平面表面的第一透镜313。Optionally, when the lens 311 includes multiple lenses, some or all of the lenses in the lens 311 may be the first lens 313 having the flat surface.
也即所述镜头311中可以存在多片表面镀有所述滤光膜层312的第一透镜313。不同的第一透镜313表面所镀的所述滤光膜层312可以相同，也可以不同。That is, there may be multiple first lenses 313 with the filter film layer 312 on the surface of the lens 311. The filter film 312 coated on the surface of different first lenses 313 may be the same or different.
假设镜头311中从物侧至像侧依次设置有透镜1、透镜2和透镜3，透镜1的物侧表面镀有滤光膜层A、透镜3的像侧表面镀有滤光膜层B，滤光膜层A和滤光膜层B为相同的滤光膜层，光信号X经过滤光膜层A时，可以滤掉95％的非目标波段，光信号X再经过滤光膜层B时，可以滤掉99.9％的非目标波段。即镜头组件310中镀多层滤光膜层可以强化滤除效果。Assuming that the lens 311 is provided with lens 1, lens 2, and lens 3 in sequence from the object side to the image side, the object side surface of lens 1 is coated with filter film layer A, and the image side surface of lens 3 is coated with filter film layer B. The filter film layer A and the filter film layer B are the same filter film layer. When the optical signal X passes through the filter film layer A, 95% of the non-target band can be filtered out, and the optical signal X passes through the filter film layer B. 99.9% of non-target bands can be filtered out. That is, the lens assembly 310 is coated with multiple filter layers to enhance the filtering effect.
又假设镜头311中从物侧至像侧依次设置有透镜1、透镜2和透镜3，透镜1的物侧表面镀有滤光膜层A、透镜3的像侧表面镀有滤光膜层B，滤 光膜层A用于滤掉红外波段的光信号，滤光膜层B用于滤掉紫外波段的光信号，光信号Y经过滤光膜层A时，可以滤掉光信号Y中的红外波段，光信号Y再经过滤光膜层B时，可以滤掉光信号Y中的紫外波段。即镜头组件310中镀多层滤光膜层可以实现多波段滤除。Suppose that the lens 311 is provided with lens 1, lens 2, and lens 3 in sequence from the object side to the image side. The object side surface of lens 1 is coated with filter film A, and the image side surface of lens 3 is coated with filter film B. , The filter film layer A is used to filter out the light signal in the infrared band, the filter film layer B is used to filter out the light signal in the ultraviolet band, when the optical signal Y passes through the filter film layer A, it can filter out the light signal in the Y In the infrared band, when the optical signal Y passes through the filter layer B, the ultraviolet band in the optical signal Y can be filtered out. That is, the lens assembly 310 is coated with multiple filter layers to achieve multi-band filtering.
应理解，图6仅是本申请实施例的光学图像采集装置的一种可能的示意图。在图6中，所述镜头311包括3片透镜，其中，1片透镜的像侧表面(下表面)为平面表面，即所述镜头311具有1个平面表面，但本申请实施例并不限于此。比如，所述镜头311可以包括更多或者更少的透镜，以及所述镜头311可以具有更多个平面表面。It should be understood that FIG. 6 is only a possible schematic diagram of the optical image acquisition device of the embodiment of the present application. In FIG. 6, the lens 311 includes three lenses, of which, the image side surface (lower surface) of one lens is a flat surface, that is, the lens 311 has one flat surface, but the embodiment of the present application is not limited to this. For example, the lens 311 may include more or fewer lenses, and the lens 311 may have more planar surfaces.
可选地，在本申请实施例中，所述镜头311包括至少一片透镜，所述至少一片透镜包括至少一片第二透镜314，所述第二透镜314表面形成有所述平面表面。Optionally, in the embodiment of the present application, the lens 311 includes at least one lens, and the at least one lens includes at least one second lens 314, and the surface of the second lens 314 is formed with the plane surface.
可选地，所述第二透镜314的物侧表面或者像侧表面上填充有透明材料315，以在所述第二透镜314的物侧表面或者像侧表面形成所述平面表面。Optionally, the object side surface or the image side surface of the second lens 314 is filled with a transparent material 315 to form the plane surface on the object side surface or the image side surface of the second lens 314.
可选地，所述透明材料315的折射率小于第一阈值。Optionally, the refractive index of the transparent material 315 is less than a first threshold.
具体地，所述第二透镜314的物侧表面或者像侧表面为曲面，即具有改变光路的作用，在所述第二透镜314的物侧表面或者像侧表面上均匀涂覆一层透明材料315。该透明材料315具有如下特征：低折射率、好的填充和流平能力、以及固化后具有较高的硬度水平。当透明材料315涂覆及固化后在所述第二透镜314的物侧表面或者像侧表面形成所述平面表面。Specifically, the object side surface or the image side surface of the second lens 314 is curved, that is, it has the function of changing the light path. A layer of transparent material is uniformly coated on the object side surface or the image side surface of the second lens 314 315. The transparent material 315 has the following characteristics: low refractive index, good filling and leveling ability, and a higher level of hardness after curing. After the transparent material 315 is coated and cured, the flat surface is formed on the object side surface or the image side surface of the second lens 314.
例如，如图7所示，所述镜头311包括3片透镜，其中，3片透镜包括一片第二透镜314，以及第二透镜314的物侧表面(上表面)上填充有透明材料315，以在所述第二透镜314的物侧表面形成所述平面表面，也即所述第二透镜314的物侧表面形成的所述平面表面上镀有所述滤光膜层312。For example, as shown in FIG. 7, the lens 311 includes three lenses, of which the three lenses include a second lens 314, and the object side surface (upper surface) of the second lens 314 is filled with a transparent material 315 to The flat surface is formed on the object side surface of the second lens 314, that is, the filter film layer 312 is plated on the flat surface formed by the object side surface of the second lens 314.
又例如，如图8所示，所述镜头311包括3片透镜，其中，3片透镜包括一片第二透镜314，以及第二透镜314的像侧表面(下表面)上填充有透明材料315，以在所述第二透镜314的像侧表面形成所述平面表面，也即所述第二透镜314的像侧表面形成的所述平面表面上镀有所述滤光膜层312。For another example, as shown in FIG. 8, the lens 311 includes three lenses, wherein the three lenses include a second lens 314, and the image side surface (lower surface) of the second lens 314 is filled with a transparent material 315, The plane surface is formed on the image side surface of the second lens 314, that is, the plane surface formed by the image side surface of the second lens 314 is plated with the filter film layer 312.
可选地，在所述镜头311包括多片透镜的情况下，所述镜头311中的部分或者全部透镜可以为形成有所述平面表面的第二透镜314。Optionally, when the lens 311 includes multiple lenses, some or all of the lenses in the lens 311 may be the second lens 314 formed with the plane surface.
也即所述镜头311中可以存在多片镀有所述滤光膜层312的第二透镜 314。不同的第二透镜314上形成的平面表面所镀的所述滤光膜层312可以相同，也可以不同。That is, there may be multiple second lenses 314 coated with the filter film layer 312 in the lens 311. The filter film layer 312 coated on the plane surface formed on the different second lenses 314 may be the same or different.
假设镜头311中从物侧至像侧依次设置有透镜1、透镜2和透镜3，透镜1的物侧表面上形成的平面表面上镀有滤光膜层A、透镜3的像侧表面上形成的平面表面上镀有滤光膜层B，滤光膜层A和滤光膜层B为相同的滤光膜层，光信号X经过滤光膜层A时，可以滤掉95％的非目标波段，光信号X再经过滤光膜层B时，可以滤掉99.9％的非目标波段。即镜头311中镀多层滤光膜层可以强化滤除效果。Assuming that the lens 311 is provided with lens 1, lens 2, and lens 3 in order from the object side to the image side, the flat surface formed on the object side surface of the lens 1 is coated with the filter film layer A, and the lens 3 is formed on the image side surface The plane surface is plated with filter film layer B, filter film layer A and filter film layer B are the same filter film layer, when optical signal X passes through filter film layer A, 95% of non-targets can be filtered out Wave band, when the optical signal X passes through the optical filter layer B, 99.9% of the non-target band can be filtered out. That is, the lens 311 is coated with multiple layers of filter film to enhance the filtering effect.
又假设镜头311中从物侧至像侧依次设置有透镜1、透镜2和透镜3，透镜1的物侧表面上形成的平面表面上镀有滤光膜层A、透镜3的像侧表面上形成的平面表面上镀有滤光膜层B，滤光膜层A用于滤掉红外波段的光信号，滤光膜层B用于滤掉紫外波段的光信号，光信号Y经过滤光膜层A时，可以滤掉光信号Y中的红外波段，光信号Y再经过滤光膜层B时，可以滤掉光信号Y中的紫外波段。即镜头311中镀多层滤光膜层可以实现多波段滤除。Suppose that the lens 311 is provided with lens 1, lens 2, and lens 3 in order from the object side to the image side. The flat surface formed on the object side surface of the lens 1 is coated with the filter film A and the image side surface of the lens 3 The formed plane surface is plated with a filter film layer B. The filter film layer A is used to filter out optical signals in the infrared band, and the filter film layer B is used to filter out optical signals in the ultraviolet band. The optical signal Y passes through the filter film When layer A is used, the infrared band in the optical signal Y can be filtered out, and when the optical signal Y passes through the optical filter layer B, the ultraviolet band in the optical signal Y can be filtered out. That is, the lens 311 is coated with a multi-layer filter film to achieve multi-band filtering.
应理解，图7和图8仅是本申请实施例的光学图像采集装置的一种可能的示意图。在图7中，所述镜头311包括3片透镜，其中，1片透镜的物侧表面(上表面)上形成有平面表面，即所述镜头311具有1个平面表面；在图8中，所述镜头311包括3片透镜，其中，1片透镜的像侧表面(下表面)上形成有平面表面，即所述镜头311具有1个平面表面，但本申请实施例并不限于此。比如，所述镜头311可以包括更多或者更少的透镜，以及所述镜头311可以具有更多个平面表面。It should be understood that FIG. 7 and FIG. 8 are only a possible schematic diagram of the optical image acquisition device of the embodiment of the present application. In FIG. 7, the lens 311 includes three lenses, of which, a flat surface is formed on the object side surface (upper surface) of one lens, that is, the lens 311 has one flat surface; in FIG. 8, The lens 311 includes three lenses, of which, a plane surface is formed on the image side surface (lower surface) of one lens, that is, the lens 311 has one plane surface, but the embodiment of the present application is not limited to this. For example, the lens 311 may include more or fewer lenses, and the lens 311 may have more planar surfaces.
在本申请实施例中，可以采用多层镀膜工艺在所述平面表面镀所述滤光膜层312。In the embodiment of the present application, the filter film layer 312 may be plated on the flat surface by a multilayer coating process.
可选地，所述滤光膜层312包括但不限于以下功能膜层中的至少一种：Optionally, the filter film layer 312 includes but is not limited to at least one of the following functional film layers:
抗反射(Antireflection，AR)层、疏油层、防眩光(Anti-Glare，AG)层、红外截止滤光(Infrared cut filter，IRCF)层。Antireflection (AR) layer, oleophobic layer, anti-glare (AG) layer, infrared cut filter (IRCF) layer.
可选地，在本申请实施例中，所述镜头311包括所述至少一片透镜，所述至少一片透镜中的部分或者全部透镜为由非球面注塑镜片组成的透镜。Optionally, in the embodiment of the present application, the lens 311 includes the at least one lens, and some or all of the at least one lens is a lens composed of an aspheric injection lens.
可选地，在本申请实施例中，所述镜头311中的每个平面表面上所镀的所述滤光膜层312的厚度小于或者等于10μm。Optionally, in the embodiment of the present application, the thickness of the filter film 312 plated on each planar surface of the lens 311 is less than or equal to 10 μm.
可选地，在本申请实施例中，所述镜头311中的所有平面表面上所镀的所述滤光膜层312的总厚度小于或者等于20μm。Optionally, in the embodiment of the present application, the total thickness of the filter film layer 312 plated on all the planar surfaces of the lens 311 is less than or equal to 20 μm.
可选地，在本申请实施例中，所述镜头311为微距镜头。Optionally, in this embodiment of the present application, the lens 311 is a macro lens.
例如，所述微距镜头的焦距范围为0.4mm～1.8mm。For example, the focal length of the macro lens ranges from 0.4mm to 1.8mm.
可选地，在本申请实施例中，例如图6-图8，所述镜头组件310还包括：Optionally, in the embodiments of the present application, such as FIGS. 6-8, the lens assembly 310 further includes:
镜筒316，用于固定所述镜头311；The lens barrel 316 is used to fix the lens 311;
镜座317，用于支撑所述镜筒316。The lens holder 317 is used to support the lens barrel 316.
可选地，所述镜头311可以通过光学胶或者点胶结构固定在所述镜筒316内，所述镜头311也可以通过支架结构固定在所述镜筒316内。Optionally, the lens 311 may be fixed in the lens barrel 316 through an optical glue or a glue dispensing structure, and the lens 311 may also be fixed in the lens barrel 316 through a bracket structure.
可选地，所述镜头组件310为镜筒316与镜座317一体式的镜头组件。Optionally, the lens assembly 310 is a lens assembly in which the lens barrel 316 and the lens holder 317 are integrated.
可选地，所述镜头组件310为镜筒316与镜座317分离式的镜头组件。例如，镜座317通过胶或者点胶结构固定镜筒316，又例如，镜座317通过螺纹结构固定镜筒316。Optionally, the lens assembly 310 is a lens assembly in which the lens barrel 316 and the lens holder 317 are separated. For example, the lens holder 317 fixes the lens barrel 316 through a glue or dispensing structure, and for example, the lens holder 317 fixes the lens barrel 316 through a threaded structure.
可选地，所述镜筒316为直通式镜筒或者螺纹调焦式镜筒。Optionally, the lens barrel 316 is a straight-through lens barrel or a threaded focusing lens barrel.
可选地，所述镜座317可以固定于电路板上。所述传感芯片320也可以固定于电路板上。Optionally, the lens holder 317 may be fixed on the circuit board. The sensor chip 320 may also be fixed on the circuit board.
可选地，在本申请实施例中，所述光学图像采集装置300设置于显示屏下方。所述镜头311具体可以用于会聚光线照射到所述显示屏上方的手指反射回来的并穿过所述显示屏的光信号。Optionally, in the embodiment of the present application, the optical image acquisition device 300 is arranged below the display screen. The lens 311 may specifically be used to condense the light signal reflected by the finger above the display screen and passing through the display screen.
需要说明的是，在本申请实施例中，“物侧表面”为远离所述传感芯片320的表面，“像侧表面”为靠近所述传感芯片320的表面。It should be noted that in the embodiment of the present application, the “object side surface” refers to the surface away from the sensor chip 320, and the “image side surface” refers to the surface close to the sensor chip 320.
应理解，在本申请实施例中，“第一”和“第二”仅为了区分不同的对象，但并不对本申请实施例的范围构成限制。It should be understood that in the embodiments of the present application, “first” and “second” are only used to distinguish different objects, but do not limit the scope of the embodiments of the present application.
本申请实施例的光学图像采集装置中，滤光膜层镀在镜头中的至少一个平面表面上，从而可以避免基底材料厚度对滤光膜层厚度的影响，能够降低滤光膜层的厚度，进而将光学图像采集装置的厚度减薄。In the optical image acquisition device of the embodiment of the present application, the filter film layer is plated on at least one plane surface in the lens, so that the influence of the thickness of the base material on the thickness of the filter film layer can be avoided, and the thickness of the filter film layer can be reduced. Furthermore, the thickness of the optical image acquisition device is reduced.
进一步地，在光学图像采集装置中，提供了一种省去基材的光学滤光片，将基材上的光学镀膜用新颖的工艺方案移植到光学镜片上，降低了镜头厚度，简化装配工艺，降低成本。以及提供在镜头中的平面表面镀膜的结构及工艺方法，消除在弯曲表面镀膜对波长选择性的不均匀性和对镜头表面曲率的影响。Furthermore, in the optical image acquisition device, an optical filter without the substrate is provided, and the optical coating on the substrate is transplanted to the optical lens with a novel process scheme, which reduces the thickness of the lens and simplifies the assembly process ,cut costs. And provide the structure and process method of the flat surface coating in the lens to eliminate the non-uniformity of the wavelength selectivity of the coating on the curved surface and the influence on the curvature of the lens surface.
本申请实施例还提供了一种电子设备400，如图9所示，所述电子设备400可以包括显示屏410以及光学图像采集装置420，该光学图像采集装置420可以为前述实施例中的光学图像采集装置300，并设置在所述显示屏410的下方。An embodiment of the present application also provides an electronic device 400. As shown in FIG. 9, the electronic device 400 may include a display screen 410 and an optical image acquisition device 420. The optical image acquisition device 420 may be the optical image acquisition device in the foregoing embodiment. The image acquisition device 300 is arranged below the display screen 410.
可选地，所述显示屏410可以是如图1中所述的显示屏120。Optionally, the display screen 410 may be the display screen 120 as described in FIG. 1.
作为一种可选的实施例，所述显示屏410具有自发光显示单元，所述自发光显示单元可以作为所述光学图像采集装置420用于进行指纹检测的激励光源。As an optional embodiment, the display screen 410 has a self-luminous display unit, and the self-luminous display unit may be used as an excitation light source for the optical image acquisition device 420 for fingerprint detection.
应理解，本申请实施例中的具体的例子只是为了帮助本领域技术人员更好地理解本申请实施例，而非限制本申请实施例的范围。It should be understood that the specific examples in the embodiments of the present application are only intended to help those skilled in the art to better understand the embodiments of the present application, rather than limiting the scope of the embodiments of the present application.
应理解，在本申请实施例和所附权利要求书中使用的术语是仅仅出于描述特定实施例的目的，而非旨在限制本申请实施例。例如，在本申请实施例和所附权利要求书中所使用的单数形式的“一种”、“上述”和“该”也旨在包括多数形式，除非上下文清楚地表示其他含义。It should be understood that the terms used in the embodiments of the present application and the appended claims are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. For example, the singular forms of "a", "above" and "the" used in the embodiments of this application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元，能够以电子硬件、计算机软件或者二者的结合来实现，为了清楚地说明硬件和软件的可互换性，在上述说明中已经按照功能一般性地描述了各示例的组成及步骤。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。A person of ordinary skill in the art may be aware that, in combination with the examples described in the embodiments disclosed herein, the units can be implemented by electronic hardware, computer software, or a combination of both, in order to clearly illustrate the interchangeability of hardware and software. In the above description, the composition and steps of each example have been described generally in terms of function. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.
在本申请所提供的几个实施例中，应该理解到，所揭露的***、装置，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个***，或一些特征可以忽略，或不执行。另外，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或通信连接，也可以是电的，机械的或其它的形式连接。In the several embodiments provided in this application, it should be understood that the disclosed system and device may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may also be electrical, mechanical or other forms of connection.
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或 者全部单元来实现本申请实施例方案的目的。The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the objectives of the solutions of the embodiments of the present application.
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以是两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分，或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of this application is essentially or the part that contributes to the existing technology, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium It includes several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program code .
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到各种等效的修改或替换，这些修改或替换都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以权利要求的保护范围为准。The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Anyone familiar with the technical field can easily think of various equivalents within the technical scope disclosed in this application. Modifications or replacements, these modifications or replacements shall be covered within the protection scope of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims (19)

  1. 一种光学图像采集装置，其特征在于，包括：An optical image acquisition device, characterized by comprising:
    镜头组件，包括镜头，所述镜头具有至少一个平面表面，所述平面表面上镀有滤光膜层，所述镜头用于会聚光信号，所述滤光膜层用于滤掉非目标波段的光信号，透过目标波段的光信号；A lens assembly, including a lens, the lens having at least one plane surface, the plane surface is plated with a filter film layer, the lens is used to converge light signals, the filter film layer is used to filter out non-target wavebands Optical signal, the optical signal passing through the target band;
    传感芯片，设置于所述镜头组件下方，所述传感芯片用于根据所述镜头会聚的光信号进行成像。The sensor chip is arranged under the lens assembly, and the sensor chip is used for imaging according to the light signal condensed by the lens.
  2. 根据权利要求1所述的光学图像采集装置，其特征在于，所述镜头包括至少一片透镜，所述至少一片透镜包括至少一片第一透镜，所述第一透镜具有所述平面表面。The optical image acquisition device according to claim 1, wherein the lens comprises at least one lens, the at least one lens comprises at least one first lens, and the first lens has the flat surface.
  3. 根据权利要求1所述的光学图像采集装置，其特征在于，所述镜头包括至少一片透镜，所述至少一片透镜包括至少一片第二透镜，所述第二透镜表面形成有所述平面表面。The optical image acquisition device according to claim 1, wherein the lens includes at least one lens, the at least one lens includes at least one second lens, and the second lens surface is formed with the flat surface.
  4. 根据权利要求3所述的光学图像采集装置，其特征在于，所述第二透镜的物侧表面或者像侧表面上填充有透明材料，以在所述第二透镜的物侧表面或者像侧表面形成所述平面表面。The optical image acquisition device according to claim 3, wherein the object-side surface or the image-side surface of the second lens is filled with a transparent material to cover the object-side surface or the image-side surface of the second lens. The flat surface is formed.
  5. 根据权利要求4所述的光学图像采集装置，其特征在于，所述透明材料的折射率小于第一阈值。4. The optical image acquisition device of claim 4, wherein the refractive index of the transparent material is less than a first threshold.
  6. 根据权利要求2至5中任一项所述的光学图像采集装置，其特征在于，所述至少一片透镜中的部分或者全部透镜为由非球面注塑镜片组成的透镜。The optical image acquisition device according to any one of claims 2 to 5, wherein part or all of the at least one lens is a lens composed of an aspheric injection lens.
  7. 根据权利要求1至6中任一项所述的光学图像采集装置，其特征在于，所述镜头中的每个平面表面上所镀的所述滤光膜层的厚度小于或者等于10μm。The optical image acquisition device according to any one of claims 1 to 6, wherein the thickness of the filter film layer plated on each plane surface of the lens is less than or equal to 10 μm.
  8. 根据权利要求1至7中任一项所述的光学图像采集装置，其特征在于，所述镜头中的所有平面表面上所镀的所述滤光膜层的总厚度小于或者等于20μm。The optical image acquisition device according to any one of claims 1 to 7, wherein the total thickness of the filter film layer plated on all plane surfaces in the lens is less than or equal to 20 μm.
  9. 根据权利要求1至8中任一项所述的光学图像采集装置，其特征在于，所述滤光膜层包括以下功能膜层中的至少一种：The optical image acquisition device according to any one of claims 1 to 8, wherein the filter film layer comprises at least one of the following functional film layers:
    抗反射层、疏油层、防眩光层、红外截止滤光层。Anti-reflective layer, oleophobic layer, anti-glare layer, infrared cut filter layer.
  10. 根据权利要求1至9中任一项所述的光学图像采集装置，其特征在 于，所述镜头为微距镜头。The optical image acquisition device according to any one of claims 1 to 9, wherein the lens is a macro lens.
  11. 根据权利要求10所述的光学图像采集装置，其特征在于，所述微距镜头的焦距范围为0.4mm～1.8mm。The optical image acquisition device according to claim 10, wherein the focal length of the macro lens ranges from 0.4 mm to 1.8 mm.
  12. 根据权利要求1至11中任一项所述的光学图像采集装置，其特征在于，所述镜头组件还包括：The optical image acquisition device according to any one of claims 1 to 11, wherein the lens assembly further comprises:
    镜筒，用于固定所述镜头；Lens barrel for fixing the lens;
    镜座，用于支撑所述镜筒。The lens holder is used to support the lens barrel.
  13. 根据权利要求12所述的光学图像采集装置，其特征在于，所述镜头组件为镜筒与镜座一体式的镜头组件。The optical image acquisition device according to claim 12, wherein the lens assembly is an integrated lens assembly with a lens barrel and a lens base.
  14. 根据权利要求12所述的光学图像采集装置，其特征在于，所述镜头组件为镜筒与镜座分离式的镜头组件。The optical image acquisition device according to claim 12, wherein the lens assembly is a lens assembly in which a lens barrel and a lens base are separated.
  15. 根据权利要求12至14中任一项所述的光学图像采集装置，其特征在于，所述镜筒为直通式镜筒或者螺纹调焦式镜筒。The optical image acquisition device according to any one of claims 12 to 14, wherein the lens barrel is a straight-through lens barrel or a threaded focusing lens barrel.
  16. 根据权利要求1至15中任一项所述的光学图像采集装置，其特征在于，所述目标波段范围为400nm～650nm。The optical image acquisition device according to any one of claims 1 to 15, wherein the target wavelength range is 400 nm to 650 nm.
  17. 根据权利要求1至16中任一项所述的光学图像采集装置，其特征在于，所述光学图像采集装置设置于显示屏下方。The optical image acquisition device according to any one of claims 1 to 16, wherein the optical image acquisition device is arranged below the display screen.
  18. 根据权利要求17所述的光学图像采集装置，其特征在于，所述镜头具体用于会聚光线照射到所述显示屏上方的手指反射回来的并穿过所述显示屏的光信号。The optical image acquisition device according to claim 17, wherein the lens is specifically used for condensing the light signal reflected by the finger above the display screen and passing through the display screen.
  19. 一种电子设备，其特征在于，包括：显示屏以及An electronic device, characterized by comprising: a display screen and
    根据权利要求1至16中任一项所述的光学图像采集装置，其中，所述光学图像采集装置设置于所述显示屏下方。The optical image acquisition device according to any one of claims 1 to 16, wherein the optical image acquisition device is arranged below the display screen.
PCT/CN2019/090214 2019-06-05 2019-06-05 Optical image acquisition apparatus and electronic device WO2020243934A1 (en)

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