CN211826851U - Optical system, camera module and electronic device - Google Patents

Optical system, camera module and electronic device Download PDF

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Publication number
CN211826851U
CN211826851U CN202020706286.6U CN202020706286U CN211826851U CN 211826851 U CN211826851 U CN 211826851U CN 202020706286 U CN202020706286 U CN 202020706286U CN 211826851 U CN211826851 U CN 211826851U
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China
Prior art keywords
light source
light
optical system
light beam
axis direction
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CN202020706286.6U
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Chinese (zh)
Inventor
冯坤亮
黄怀毅
李宗政
吴木源
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Jiangxi Oumaisi Microelectronics Co Ltd
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OFilm Microelectronics Technology Co Ltd
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Priority to CN202020706286.6U priority Critical patent/CN211826851U/en
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Publication of CN211826851U publication Critical patent/CN211826851U/en
Priority to PCT/CN2021/087407 priority patent/WO2021218647A1/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B15/00—Special procedures for taking photographs; Apparatus therefor
    • G03B15/02—Illuminating scene

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Stroboscope Apparatuses (AREA)

Abstract

The utility model discloses an optical system, camera module and electron device. The optical system includes: a light source emitting a light beam having a wavelength of 1300nm to 1600 nm; a converging member provided at one side of the light source to converge the light beam emitted from the light source; and the light homogenizing piece is arranged on one side of the converging piece, which is far away from the light source, so that the converged light beams are uniformly diffused to an illuminated object. The camera module uniformly diffuses the light source of the light beam with the wavelength of 1300nm-1600nm to the object to be irradiated after sequentially passing through the convergence part and the light homogenizing part, so that the problem that the vision of the person is unfavorable under the long-time illumination of the light beam with the wavelength of 940nm in the prior art is solved, the outline of a light spot reaching the object to be irradiated is clear, the illumination effect is good, and the camera module is safer for human eyes.

Description

Optical system, camera module and electronic device
Technical Field
The utility model relates to an optics and electron technical field, concretely relates to optical system, camera module and electron device.
Background
The depth camera module can acquire depth information of a target, so that 3D face recognition, 3D scanning, scene modeling and gesture interaction are realized, the depth camera module is gradually paid attention to various industries, for example, a motion sensing game can be realized by combining the depth camera module with a television, a computer and the like so as to achieve the effect of two-in-one game and fitness, for example, very real AR game experience can be realized by combining the depth camera module with a tablet computer, a mobile phone and other mobile devices, and the depth camera module can be used for performing functions of indoor map creation, navigation and the like.
The core component in the depth camera module is an optical system. At present, the optical system directly cooperates with a light-homogenizing element to realize the effect of light-homogenizing illumination through a Vertical-Cavity Surface-Emitting Laser (VCSEL). In the process of implementing the present invention, the inventor finds that there are at least the following problems in the prior art: since the wavelength of the light beam emitted from the vertical cavity surface emitting laser is usually 940nm, the long-time illumination of the light beam in this wavelength band adversely affects the human eyesight.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is desirable to provide an optical system, a camera module and an electronic device to solve the above problems.
An embodiment of the present application provides an optical system, including:
a light source emitting a light beam having a wavelength of 1300nm to 1600 nm;
the converging piece is arranged on one side of the light source and is used for converging the light beam emitted by the light source; and
and the light homogenizing piece is arranged on one side of the converging piece, which is deviated from the light source, and is used for uniformly diffusing the converged light beam to an irradiated object.
The optical illumination system solves the problem that the light source of the light beam with the wavelength of 1300nm to 1600nm is unfavorable to the eyesight of people under the long-time illumination of the light beam with the wavelength of 940nm in the prior art by sequentially converging the light source of the light beam with the wavelength of 1300nm to 1600nm through the converging piece and uniformly diffusing the light beam to the illuminated object, so that the outline of a light spot reaching the illuminated object is clear, the illumination effect is good, and the light beam with the wavelength of 1300nm to 1600nm is safer for the eyes of people.
In some embodiments, the converging member is any one of a partial cylinder, a partial ellipse, or an ellipse.
The utility model discloses among the optical system, because the wavelength that the light source sent is 1300nm-1600 nm's light beam has great diffusion angle for the facula that reachs the illuminated thing disperses, and the piece that converges can converge behind the great light beam of diffusion angle partial cylinder, cylindric, partial ellipse or the light-transmitting material refraction of ellipse form, makes the facula that reachs the illuminated thing even, the profile is clear.
In some embodiments, the converging member is semi-cylindrical.
The utility model discloses among the optical system, when converging the piece for the semicircle column, the light beam gets into in the piece that converges from the cross-section of converging the piece to jet out after the arcwall face relative with the cross-section converges, for cylindric, the piece that converges of partial ellipse shape or ellipse shape, the piece that converges of semicircle column is converged the effect better, and finally arrives the facula of being shone the thing also more even, and the profile is also more clear.
In some embodiments, the focusing element is any one of quartz, glass, or optical plastic.
The embodiment of the utility model provides an among the optical system, quartz, glass or optics plastic are the printing opacity material, and set to after semi-cylindrical, cylindric, semiellipse shape and ellipse shape can carry out refraction convergence with the great light beam in diffusion angle.
In some embodiments, the refractive index of the converging member is 1.4-2.0.
The utility model discloses among the optical system, the convergence effect of convergence piece in above-mentioned refracting index scope is better, and can adjust the refracting index of convergence piece in above-mentioned within range to the light beam that has great diffusion angle that sends the light source converges into required diffusion angle.
In some embodiments, the light source is an edge-emitting laser light source or a distributed feedback laser light source.
The utility model discloses among the optical system, the wavelength of the light beam of edge emission formula laser light source and distribution feedback formula laser light source transmission all is in 1300nm-1600nm, and the light beam is comparatively stable, and the cost is lower.
In some embodiments, the light source emits an unconverged light beam having a divergence angle in the fast axis direction of 30 ° to 50 ° and a divergence angle in the slow axis direction of 6 ° to 14 °, and the light source emits a converged light beam having a divergence angle in the fast axis direction of 6 ° to 14 ° and a divergence angle in the slow axis direction of 6 ° to 14 °.
The utility model discloses among the optical system, the adjustable light source of convergence piece is at the divergence angle of fast axle direction, makes it adjust for the same with slow axle to obtain even, the clear facula of outline.
In some embodiments, the transmission of the smoothing member is greater than 90%.
The utility model discloses among the optical system, even light spare is used for carrying out even diffusion with the light beam after the convergence, and the light beam after the convergence can carry out more even atomizing in even light spare when the transmissivity is greater than 90% for light beam evenly diffusion after the atomizing is to the illuminated thing.
The embodiment of the present application further provides a camera module, including:
a lens; and
in the above optical system, the optical system is disposed at one side of the lens.
The camera module uniformly diffuses the light source of the light beam with the wavelength of 1300nm-1600nm to the object to be irradiated after sequentially passing through the converging piece and the light homogenizing piece, so that the problem that the vision of the object to be irradiated is unfavorable to the human vision under the long-time illumination of the light beam with the wavelength of 940nm in the prior art is solved, the outline of a light spot reaching the object to be irradiated is clear, the illumination effect is good, and the light beam with the wavelength of 1300nm-1600nm is safer for human eyes.
An embodiment of the present application further provides an electronic device, including:
a housing; and
the camera module is mounted on the shell.
The electronic device solves the problem that the prior art is unfavorable to the eyesight of people under the long-time illumination of the light beam with the wavelength of 940nm, ensures that the outline of a light spot reaching the illuminated object is clear, the illumination effect is good, and the light beam with the wavelength of 1300nm to 1600nm is safer for human eyes by sequentially converging the light source of the light beam with the wavelength of 1300nm to 1600nm through the converging part and the light homogenizing part and then uniformly diffusing the light beam to the illuminated object.
Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is an optical schematic diagram of a light source at a fast axis in an optical system according to a first embodiment of the present invention.
Fig. 2 is an optical schematic diagram of a light source at a slow axis in an optical system according to a first embodiment of the present invention.
Fig. 3 is a light spot pattern obtained after the condensing element is not provided in the optical system according to the embodiment of the present invention.
Fig. 4 is a speckle pattern obtained after a converging member is disposed in an optical system according to an embodiment of the present invention.
Fig. 5 is an optical schematic diagram of a light source at a fast axis in an optical system according to a second embodiment of the present invention.
Fig. 6 is an optical schematic diagram of a light source at a slow axis in an optical system according to a second embodiment of the present invention.
Fig. 7 is an optical schematic diagram of a light source at the fast axis in an optical system according to a third embodiment of the present invention.
Fig. 8 is an optical schematic diagram of a light source at a slow axis in an optical system according to a third embodiment of the present invention.
Fig. 9 is an optical schematic diagram of a light source at the fast axis in an optical system according to a fourth embodiment of the present invention.
Fig. 10 is an optical schematic diagram of a light source at a slow axis in an optical system according to a fourth embodiment of the present invention.
Fig. 11 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Description of the main elements
Electronic device 1000
Camera module 100
Optical system 10, 20, 30, 40
Light sources 12, 22, 32, 42
Light beams 122, 222, 322, 422
Convergence member 14, 24, 34, 44
Cross-sections 142, 242, 342
Light- homogenizing elements 16, 26, 36, 46
Lens 50
Housing 200
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
Referring to fig. 1, an optical system 10 according to an embodiment of the present invention includes a light source 12, a converging member 14, and a light-homogenizing member 16.
In particular, the light source 12 is adapted to emit a light beam 122 having a wavelength of 1300nm-1600 nm. The converging member 14 is provided at one side of the light source 12 for converging the light beam 122 emitted from the light source 12. The light homogenizing element 16 is disposed on a side of the converging element 14 facing away from the light source 12, and is used for uniformly diffusing the converged light beam 122 to an illuminated object (not shown).
In this embodiment, the light sources with wavelengths less than 1300nm and greater than 1600nm are either unstable, or costly, or may be harmful to the human eye, and are not suitable for uniform illumination; the light source with the wavelength of 1300nm-1600nm is more stable, has lower cost, is beneficial to human eyes and is suitable for industrial production.
In some embodiments, convergence 14 is any one of a partial cylinder, a partial ellipse, and an ellipse. Wherein, the partial cylinder shape can be a semi-cylinder shape, and the partial ellipse shape can be a semi-ellipse shape.
In the optical system 10 of the embodiment of the present invention, the light beam 122 with the wavelength of 1300nm-1600nm emitted by the light source 12 has a large diffusion angle, so that the light spot of the illuminated object can be diffused, and the converging member 14 can converge the light beam 122 with the large diffusion angle after passing through the light-transmitting material with a part of cylindrical shape, partial elliptical shape or elliptical shape, so that the light spot of the illuminated object can be reached uniformly and clearly.
In some embodiments, convergence 14 is semi-cylindrical.
The utility model discloses in optical system 10, when converging 14 for the semi-cylindrical, the light beam gets into from the cross-section 142 of converging 14 and converges in converging to jet out after the arcwall face relative with cross-section 142 converges, for cylindric, partial ellipse or ellipse circular's convergence 14, semi-cylindrical's convergence 14 effect of converging is better, and finally reachs the facula of being shone the thing and also more even, and the profile is also more clear.
In some embodiments, the focusing element 14 is any one of quartz, glass, or optical plastic.
In the optical system 10 of the embodiment of the present invention, quartz, glass, or optical plastic is a transparent material, and is set to be partially cylindrical, partially elliptical, or elliptical, and then the light beam 122 with a large diffusion angle can be converged.
In some embodiments, the refractive index of concentrator 14 is 1.4-2.0.
In the optical system 10 of the embodiment of the present invention, the converging effect of the converging element 14 in the above refractive index range is better, and the refractive index of the converging element 14 can be adjusted in the above range, so as to converge the light beam 122 with a larger diffusion angle emitted by the light source 12 into the light beam 122 with a desired diffusion angle. When the refractive index of the condensing element 14 is less than 1.4 or more than 2.0, the condensing effect of the condensing element 14 is poor, so that the portion of the light spot reaching the object to be irradiated is not uniform.
In some embodiments, light source 12 is an edge-emitting laser light source or a distributed feedback laser light source.
The utility model discloses in optical system 10, the wavelength of the light beam 122 of edge emission formula laser light source and distribution feedback formula laser light source transmission all is in 1300nm-1600nm, and light beam 122 is comparatively stable, and the cost is lower.
In some embodiments, the divergence angle θ of the unconverged light beam 122 emitted by the light source 12 in the fast axis direction1Is 30 DEG to 50 DEG, and has a divergence angle theta in the slow axis direction2Is 6 to 14 degrees. Please refer toReferring to fig. 3, the light spots are dispersed and the illumination effect is poor when the non-converged light source 12 reaches the illuminated object. The divergence angle of the converged light beam emitted by the light source is 6 to 14 degrees in the fast axis direction and 6 to 14 degrees in the slow axis direction.
It should be noted that the light source emits light beams in the X-axis direction, and the light beams have divergence angles in both the fast axis direction and the slow axis direction, where the fast axis direction is the Z-axis direction in fig. 1 and the slow axis direction is the Y-axis direction in fig. 2.
In the optical system 10 of the embodiment of the present invention, the curvature of the converging part 14 in the slow axis direction corresponding to the light beam is 0, that is, the converging part 14 does not adjust the divergence angle of the light beam in the slow axis direction; the converging part 14 has positive curvature in the fast axis direction of the corresponding light beam, the light beam enters the converging part 14 to be refracted and converged, and the positive curvature of the converging part 14 in the fast axis direction of the corresponding light beam is adjusted according to actual needs, so that the divergence angle of the non-converged light beam 122 emitted by the light source 12 in the fast axis direction is the same as that in the slow axis direction, and uniform and clear-profile light spots are obtained. Referring to fig. 4, after the converged light source 12 reaches the object to be illuminated, the light spots are uniform, the outline is clear, and the illumination effect is good.
In some embodiments, the light unifying member 16 is a diffuser.
The utility model discloses diffusion piece can atomize the light beam after the convergence among optical system 10 to evenly spread to the illuminated thing.
In some embodiments, the transmission of the smoothing member 16 is greater than 90%.
The utility model discloses among the optical system, even light piece 16 is used for carrying out even diffusion with the light beam after the convergence, and the light beam 122 after the convergence can carry out more even atomizing in even light piece 16 when the transmissivity is greater than 90% for light beam 122 after the atomizing evenly diffuses to the illuminated object. When the transmittance is less than or equal to 90%, the condensed partial light beam 122 cannot be uniformly diffused after passing through the light uniformizing element 16, so that the partial light spots reaching the irradiated object are not uniform.
First embodiment
With continued reference to fig. 1, the optical system 10 in the present embodiment includes a light source 12, a converging element 14, and an dodging element 16.
In particular, the light source 12 is configured to emit a light beam 122 having a wavelength of 1300 nm. The converging part 14 is made of quartz material and is semi-cylindrical, the converging part 14 is arranged at one side of the light source 12 and is used for converging the light beam 122 emitted by the light source 12, specifically, the light beam 122 enters the converging part 14 from the cross section 142 of the converging part 14 and is transmitted to the light homogenizing part 16 from the other side after being converged. The light homogenizing element 16 is disposed on a side of the converging element 14 facing away from the light source 12, and is used for uniformly diffusing the converged light beam 122 to an illuminated object (not shown). Wherein the cross-section 142 is planar.
In this embodiment, the divergence angle θ of the non-converged light source 12 in the fast axis direction1Is 40 DEG, and the divergence angle theta of the converged light source 12 on the fast axis2Is 9.967 degrees.
Referring to FIG. 2, the divergence angle θ of the non-converged light source 12 in the slow axis direction 310 DEG, the divergence angle theta of the converged light source 12 in the slow axis direction4Is 10 deg..
It should be noted that the light source emits light beams in the X-axis direction, and the light beams have divergence angles in both the fast axis direction and the slow axis direction, where the fast axis direction is the Z-axis direction in fig. 1 and the slow axis direction is the Y-axis direction in fig. 2.
The optical illumination system 10 of the embodiment converges the light source 12 of the light beam 122 with the wavelength of 1300nm through the converging part 14 and the light homogenizing part 16 in sequence and then uniformly diffuses the light to the object to be illuminated, so that the problem that the eyesight of the person is unfavorable under the long-time illumination of the light beam with the wavelength of 940nm in the prior art is solved, the outline of the light spot reaching the object to be illuminated is clear, the illumination effect is good, and the light beam is safer for the eyes of the person.
Second embodiment
Referring to fig. 5, the optical system 20 in the present embodiment includes a light source 22, a converging member 24, and an dodging member 26.
In particular, the light source 22 is used to emit a light beam having a wavelength of 1450 nm. The converging part 24 is made of quartz material and is semi-cylindrical, and the converging part 24 is disposed at one side of the light source 22 and is used for converging the light beam emitted by the light source 22, specifically, the light beam 222 enters the converging part 24 from the cross section 242 of the converging part 24 and is transmitted to the light uniformizing part 26 from the other side after being converged. The light homogenizing element 26 is disposed on a side of the converging element 24 facing away from the light source 22 for uniformly diffusing the converged light beam to an object (not shown). Wherein the cross-section 242 is planar.
In this embodiment, the divergence angle θ of the unconverged light source 22 in the fast axis direction 540 deg., the divergence angle theta of the converged light source 22 in the fast axis6Is 9.972 degrees.
Referring to FIG. 6, the divergence angle θ of the unconverged light source 22 in the slow axis direction 710 DEG, the divergence angle theta of the converged light source 12 in the slow axis direction8Is 10 deg..
It should be noted that the light source emits light beams in the X-axis direction, and the light beams have divergence angles in both the fast axis direction and the slow axis direction, where the fast axis direction is the Z-axis direction in fig. 5 and the slow axis direction is the Y-axis direction in fig. 6.
The optical illumination system 20 of the embodiment converges the light source 22 of the light beam with the wavelength of 1450nm through the converging part 24 and the light homogenizing part 26 in sequence and then uniformly diffuses the light beam to the object to be illuminated, so that the problem that the eyesight of the person is unfavorable under the long-time illumination of the light beam with the wavelength of 940nm in the prior art is solved, the outline of the light spot reaching the object to be illuminated is clear, the illumination effect is good, and the light beam is safer for the eyes of the person.
Third embodiment
Referring to fig. 7, the optical system 30 in the present embodiment includes a light source 32, a converging element 34, and an dodging element 36.
In particular, the light source 32 is adapted to emit a light beam 322 having a wavelength of 1600 nm. The converging part 34 is made of quartz material and is semi-cylindrical, the converging part 34 is disposed at one side of the light source 32, and is used for converging the light beam 322 emitted by the light source 32, specifically, the light beam 322 enters the converging part 34 from the cross section 342 of the converging part 34, and is transmitted to the light homogenizing part 36 from the other side after being converged. The light homogenizing element 36 is disposed on a side of the converging element 34 facing away from the light source 32, and is used for uniformly diffusing the converged light beam 322 to an illuminated object (not shown). Wherein the cross-section 342 is planar.
In this embodiment, the divergence angle θ of the unconverged light source 22 in the fast axis direction 940 deg., the divergence angle theta of the converged light source 22 in the fast axis10Is 10 deg..
Referring to FIG. 8, the divergence angle θ of the non-converged light source 12 in the slow axis direction 1110 DEG, the divergence angle theta of the converged light source 12 in the slow axis direction12Is 10 deg..
It should be noted that the light source emits light beams in the X-axis direction, and the light beams have divergence angles in both the fast axis direction and the slow axis direction, where the fast axis direction is the Z-axis direction in fig. 7 and the slow axis direction is the Y-axis direction in fig. 8.
The optical illumination system 20 of the embodiment converges the light source 22 of the light beam with the wavelength of 1600nm through the converging part 24 and uniformly diffuses the light beam to the object to be illuminated after passing through the light homogenizing part 26, so that the problem that the eyesight of the person is unfavorable under the long-time illumination of the light beam with the wavelength of 940nm in the prior art is solved, the outline of the light spot reaching the object to be illuminated is clear, the illumination effect is good, and the light beam is safer for the eyes of the person.
Fourth embodiment
Referring to fig. 9, the optical system 40 of the present embodiment includes a light source 42, a converging element 44, and a light homogenizing element 46.
Specifically, the light source 42 is used to emit a light beam having a wavelength of 1300 nm. The converging member 44 is made of quartz and has a cylindrical shape, and the converging member 44 is disposed at one side of the light source 42 for converging the light beam emitted from the light source 42. The light homogenizing element 46 is disposed on a side of the converging element 44 facing away from the light source 42 for uniformly diffusing the converged light beam to an object (not shown).
In this embodiment, the divergence angle θ of the non-converged light source 42 in the fast axis direction13At 40 deg., the divergence angle theta of the converged light source 42 in the fast axis14Is 9.9 degrees.
Referring to FIG. 10, the divergence angle θ of the non-converged light source 42 in the slow axis direction 1510 deg., and the divergence angle theta of the converged light source 42 in the slow axis direction16Is 10 deg..
It should be noted that the light source emits light beams in the X-axis direction, and the light beams have divergence angles in both the fast axis direction and the slow axis direction, where the fast axis direction is the Z-axis direction in fig. 9 and the slow axis direction is the Y-axis direction in fig. 10.
The optical illumination system 40 of the embodiment converges the light source 22 of the light beam with the wavelength of 1300nm through the converging part 44 and the light homogenizing part 46 in sequence and then uniformly diffuses the light beam to the object to be illuminated, so that the problem that the eyesight of the person is unfavorable under the long-time illumination of the light beam with the wavelength of 940nm in the prior art is solved, the outline of the light spot reaching the object to be illuminated is clear, the illumination effect is good, and the light beam is safer for the eyes of the person.
From the first, second and third embodiments described above, it can be seen that: the divergence angle of the beams with the wavelengths of 1300nm, 1450nm and 1600nm emitted by the light source in the fast axis direction after being converged by the converging piece is close to or equal to the divergence angle emitted by the light source in the slow axis direction, the outline of the light spot reaching the illuminated object is clear, and the illumination effect is good.
From the first and fourth embodiments described above, it can be seen that: the divergence angles of the light beams with the same wavelength emitted by the light source in the fast axis direction after being converged by the different cylindrical converging pieces approach the divergence angle emitted by the light source in the slow axis direction, the outline of the light spot reaching the illuminated object is clear, and the illumination effect is good.
Referring to fig. 11, the optical illumination system 10 of the embodiment of the present invention can be applied to the camera module 100 of the embodiment of the present invention. The camera module 100 includes the lens 50 and the optical system 10 of any of the above embodiments. The optical system 10 is installed at one side of the lens 50. The camera module 100 may be a time-of-flight ranging module, and determines a distance between the camera module 10 and the object to be illuminated by detecting a time when the light beam emitted from the optical system 10 reaches the lens 50 after being emitted by the object to be illuminated, so as to acquire three-dimensional information of the object to be illuminated.
Referring to fig. 11, the camera module 100 according to the embodiment of the present invention can be applied to the electronic device 1000 according to the embodiment of the present invention. The electronic device 1000 includes a housing 200 and a camera module 100, wherein the camera module 100 is mounted on the housing 200.
The electronic device 100 of the embodiment of the present invention includes, but is not limited to, an electronic device supporting imaging, such as a smart phone, a tablet computer, a notebook computer, an electronic book reader, a Portable Multimedia Player (PMP), a portable phone, a video phone, a digital still camera, a mobile medical device, and a wearable device.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. An optical system, comprising:
a light source emitting a light beam having a wavelength of 1300nm to 1600 nm;
a converging member provided at one side of the light source to converge the light beam emitted from the light source; and
and the light homogenizing piece is arranged on one side of the converging piece, which is far away from the light source, so that the converged light beams are uniformly diffused to an irradiated object.
2. The optical system of claim 1 wherein the converging member is any one of a partial cylinder, partial ellipse, or ellipse.
3. The optical system of claim 2 wherein said converging means is semi-cylindrical.
4. The optical system of claim 2 wherein the focusing element is any one of quartz, glass or optical plastic.
5. An optical system as claimed in any one of claims 2 to 4, characterized in that the refractive index of the converging means is 1.4 to 2.0.
6. The optical system of claim 1, wherein the light source is an edge-emitting laser light source or a distributed feedback laser light source.
7. The optical system of claim 6, wherein the light source emits an unconverged light beam having a divergence angle of 30 ° to 50 ° in a fast axis direction and a divergence angle of 6 ° to 14 ° in a slow axis direction, and wherein the light source emits a converged light beam having a divergence angle of 6 ° to 14 ° in the fast axis direction and a divergence angle of 6 ° to 14 ° in the slow axis direction.
8. The optical system of claim 1 wherein the light spreader has a transmittance of greater than 90%.
9. The utility model provides a camera module which characterized in that includes:
a lens; and
the optical system of any one of claims 1 to 8, disposed to one side of the lens.
10. An electronic device, comprising:
a housing; and
the camera module of claim 9, said camera module mounted on said housing.
CN202020706286.6U 2020-04-30 2020-04-30 Optical system, camera module and electronic device Active CN211826851U (en)

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