CN111609378A - Light filling lens and camera equipment - Google Patents
Light filling lens and camera equipment Download PDFInfo
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- CN111609378A CN111609378A CN201910137587.3A CN201910137587A CN111609378A CN 111609378 A CN111609378 A CN 111609378A CN 201910137587 A CN201910137587 A CN 201910137587A CN 111609378 A CN111609378 A CN 111609378A
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- light
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- transmitting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
- F21V13/02—Combinations of only two kinds of elements
- F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
- F21V7/06—Optical design with parabolic curvature
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
- G02B1/041—Lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
- G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles
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- 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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention discloses a light supplementing lens and camera equipment, wherein the light supplementing lens comprises a high light transmitting structure and a high reflection structure arranged below the high light transmitting structure, the light transmittance of the high light transmitting structure is higher than that of the high reflection structure, the reflectivity of the high light transmitting structure is lower than that of the high reflection structure, the high reflection structure is a cavity structure, and the bottom of the cavity structure is provided with a through hole matched with a light supplementing lamp, so that light rays emitted by the light supplementing lamp are reflected by a cavity wall and then are emitted onto the lower surface of the high light transmitting structure. Light filling lens in this application can set up in light filling lamp top when using to light that is in light filling lamp wide-angle range can reflect to high light-transmitting structure's lower surface through high reflection configuration on, then light jets out through high light-transmitting structure again, because high reflection configuration's reflectivity is higher, high light-transmitting structure's transmissivity is higher, so can improve utilization ratio and the light-emitting efficiency of light that originally sheltered from by the structure greatly, thereby improve the light filling effect.
Description
Technical Field
The embodiment of the invention relates to the technical field of camera equipment, in particular to a light supplementing lens and camera equipment.
Background
An IPC (IP Camera) is formed by combining a network coding module and an analog CAMERA, wherein the network coding module codes and compresses analog video signals collected by the analog CAMERA into digital signals, so that the IPC can be directly accessed to network switching and routing equipment. Conventional IPC makes the light-emitting aperture receive the restriction because of structure and molding restriction, causes the wide-angle light to be sheltered from by the structure, can not realize the demand of big visual field light filling, leads to light utilization ratio low. With the continuous release of the large target surface sensor and the gradual increase of the application requirements of a large field angle, the large-field shooting of the camera becomes an inevitable trend, but if the original light supplement scheme (non-large-angle light supplement scheme) of the camera is directly used, the defect of a light supplement dark angle easily occurs, and the insufficient light supplement intensity of the whole picture easily occurs due to the low light utilization rate, so that how to realize the large-field light supplement becomes an important link for improving the camera quality.
At present, three methods are generally adopted in the prior art to realize large-view-angle light supplement, one method is to reduce the quantity of light rays shielded by the structure by increasing the light-emitting aperture, but the increase of the light-emitting aperture needs to correspondingly increase the structural shape of the camera, so that the volume and the cost are increased, and the miniaturization development requirement is not facilitated; the other is that the light emitting position of the light supplement lamp is raised to reduce the quantity of light shielded by the structure, but the light emitting position of the light supplement lamp is raised to increase the risk of lens fogging; the other is to improve the dark angle condition by introducing a large-angle micro light supplement lens, and a TIR lens (as shown in fig. 1) is usually adopted, but the TIR lens has low light extraction efficiency and poor light supplement effect.
In view of this, how to provide a fill-in lens and an image pickup apparatus that solve the above technical problems becomes a problem to be solved by those skilled in the art.
Disclosure of Invention
The embodiment of the invention aims to provide a light supplementing lens and camera equipment, which can greatly improve the utilization rate and light emitting efficiency of light rays originally shielded by a structural member in the using process, so that the light supplementing effect is improved.
In order to solve the above technical problem, an embodiment of the present invention provides a light compensating lens, including a high light transmitting structure and a high reflection structure disposed below the high light transmitting structure, wherein:
the light transmittance of the high light-transmitting structure is higher than that of the high-reflecting structure, the reflectivity of the high light-transmitting structure is lower than that of the high-reflecting structure, the high-reflecting structure is a cavity structure, and a through hole matched with the light supplementing lamp is formed in the bottom of the cavity structure, so that light emitted by the light supplementing lamp is reflected by the cavity wall and then enters the lower surface of the high light-transmitting structure.
Optionally, the cavity is a rectangular paraboloid cavity.
Optionally, the upper surface of the high light-transmitting structure is a free-form surface, and the lower surface of the high light-transmitting structure is a plane.
Optionally, the upper surface of the top view of the high light-transmitting structure is a free-form surface with a rectangular boundary.
Optionally, the high light-transmitting structure is made of a high light-transmitting material doped with first scattering particles, and/or the high-reflection structure is made of a high-reflection material doped with second scattering particles.
Optionally, the high light-transmitting material is one or a combination of polymethyl methacrylate, polystyrene, methylpentene and polyolefin resin.
Optionally, the highly reflective material is a specular material or a diffuse and semi-diffuse material.
Optionally, the mass fraction of the first scattering particles is 2% to 15%, and/or the mass fraction of the second scattering particles is 2% to 15%.
Optionally, the first scattering particles and/or the second scattering particles are spherical silica.
The embodiment of the invention also provides the camera equipment, which comprises the light supplementing lens.
The embodiment of the invention provides a light supplementing lens and camera equipment, wherein the light supplementing lens comprises a high light-transmitting structure and a high-reflection structure arranged below the high light-transmitting structure, the light transmittance of the high light-transmitting structure is higher than that of the high-reflection structure, the reflectivity of the high light-transmitting structure is lower than that of the high-reflection structure, the high-reflection structure is a cavity structure, and a through hole matched with a light supplementing lamp is formed in the bottom of the cavity structure so that light emitted by the light supplementing lamp can be reflected by a cavity wall and then emitted to the lower surface of the high light-transmitting structure.
It is visible, light filling lens in this application can set up in light filling lamp top when using, also the light filling lamp can set up in the through-hole of light filling lens's high reflecting structure cavity bottom, and the light that is in light filling lamp wide-angle range can reflect to setting up on the high light transmitting structure's of high reflecting structure top lower surface through high reflecting structure, then light jets out through high light transmitting structure again, because high reflecting structure's reflectivity is higher than high light transmitting structure's reflectivity, high light transmitting structure's transmissivity is higher than high reflecting structure's luminousness, so can improve the utilization ratio and the light-emitting efficiency of the light that originally sheltered from by the structure greatly, thereby improve the light filling effect.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the prior art and the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic diagram of a conventional light supplementing structure based on a TIR lens;
fig. 2 is a schematic structural diagram of a light compensating lens according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a light supplement principle of a light supplement lens according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a light compensating lens according to an embodiment of the present invention;
FIG. 5 is a transverse cross-sectional view of FIG. 4;
FIG. 6 is a longitudinal cross-sectional view of FIG. 4;
FIG. 7 is a schematic diagram of a light spot corresponding to a TIR lens in the prior art;
fig. 8 is a schematic view of a light spot corresponding to the light compensating lens in this embodiment.
Detailed Description
The embodiment of the invention provides a light supplementing lens and camera equipment, which can greatly improve the utilization rate and light emitting efficiency of light originally shielded by a structural member in the using process, so that the light supplementing effect is improved.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a light compensating lens according to an embodiment of the present invention.
This light filling lens, including high light transmission structure 1 with set up in high reflection configuration 2 of high light transmission structure 1 below, wherein:
the luminousness of high light-transmitting structure 1 is higher than the luminousness of high reflection structure 2, and the reflectivity of high light-transmitting structure 1 is less than the reflectivity of high reflection structure 2, and high reflection structure 2 is cavity structures, and cavity structures's bottom is equipped with and is used for with light filling lamp assorted through-hole 22 to the light of light filling lamp transmission jets into on high light-transmitting structure 1's lower surface after the reflection of chamber wall.
Specifically, the light supplement lens in this embodiment may be manufactured by two-color injection molding, and the light supplement lens includes a high light transmission structure 1 having a high light transmittance and a high reflection structure 2 having a high reflection rate, wherein the high reflection structure 2 is disposed below the high light transmission structure 1, and the high reflection structure 2 is a cavity structure, the cavity structure has a cavity 21 inside, a through hole 22 is disposed at the bottom of the cavity structure (i.e., at the bottom of the high reflection structure 2), the through hole 22 can communicate the outside of the high reflection structure 2 with the inside of the cavity 21, the light supplement lens is disposed above a light supplement lamp of a camera device when in use, so that the light supplement lamp passes through the through hole 22 and is located inside the cavity 21, light within a small angle range of the light supplement lamp can directly irradiate onto the lower surface of the high light transmission structure 1, and then irradiate out through the high light transmission structure 1 after being refracted by the high light transmission structure 1, light within a large angle range of the light supplement lamp can irradiate onto the, the light incident on the inner surface of the high-reflection structure 2 is reflected and refracted by the cavity wall and then enters the lower surface of the high-light-transmission structure 1, and the light incident on the lower surface of the high-light-transmission structure 1 is refracted by the high-light-transmission structure 1 and then exits through the high-light-transmission structure 1, so as to perform large-angle light supplement, and fig. 3 is a specific schematic diagram.
Because the light transmittance of the high light-transmitting structure 1 in this embodiment is higher than the light transmittance of the high-reflecting structure 2, and the reflectivity of the high light-transmitting structure 1 is lower than the reflectivity of the high-reflecting structure 2, that is, the reflectivity and the transmissivity of the high light-transmitting structure 1 and the high-reflecting structure 2 in this embodiment are different, and the high light-transmitting structure 1 has higher transmissivity, and the high-reflecting structure 2 has higher reflectivity, for example, the transmissivity of the high light-transmitting structure 1 may not be less than 90%, and the reflectivity of the high-reflecting structure 2 may not be less than 90%, after light emitted by the fill light lamp is incident on the inner surface of the high-reflecting structure 2, the high-reflecting structure 2 can reflect a greater part of light to the lower surface of the high light-transmitting structure 1, and then transmit the light out, that is, most of light originally blocked by the structural, therefore, the light utilization rate is improved, and the light supplement effect is further improved, wherein the specific numerical value of the transmittance of the high light-transmitting structure 1 and the specific numerical value of the reflectance of the high reflection structure 2 in this embodiment can be determined according to actual conditions, and this embodiment is not particularly limited.
Further, the cavity 21 is a rectangular paraboloid cavity.
It should be noted that, since the lens field of the image pickup apparatus is generally rectangular, in order to further reduce the occurrence of the fill-in dark angle, the cavity 21 of the high reflection structure 2 in this embodiment may be a rectangular paraboloid cavity, that is, a side surface of the cavity 21 forms a rectangular paraboloid light collector, specifically, referring to the cavity 21 in fig. 4, 5 and 6, the rectangular paraboloid cavity in this embodiment is beneficial to make the light spot finally emitted by the fill-in lens rectangular, and reduce the fill-in dark angle.
Furthermore, in order to improve the uniformity of the light-emitting spots and further improve the light-supplementing effect, the upper surface of the high light-transmitting structure 1 in this embodiment may be a free-form surface, and the lower surface of the high light-transmitting structure 1 may be a plane, specifically referring to the high light-transmitting structure 1 in fig. 4, 5, and 6.
Specifically, after light penetrates into the lower surface of the high-light-transmission structure 1, the light penetrates into the upper surface of the high-light-transmission structure 1 through lower surface refraction, and the high-light-transmission structure 1 is then ejected through the upper surface refraction.
Furthermore, in order to further ensure that the light-emitting light spot is a rectangular light spot, the upper surface of the high light-transmitting structure 1 in this embodiment may be a free-form surface with a rectangular boundary, so that the light incident on the lower surface of the high light-transmitting structure 1 is refracted by the high light-transmitting structure 1 and then emitted from the upper surface, and the formed light spot is a rectangular light spot, so as to further improve the effective area of light supplement and reduce the occurrence of the dark corner of light supplement.
It should be noted that, in order to further improve the uniformity of the light-emitting spot, the high light-transmitting structure 1 in this embodiment may be a high light-transmitting structure made of a high light-transmitting material doped with first scattering particles, and/or the high reflection structure 2 may be a high reflection structure made of a high reflection material doped with second scattering particles.
It can be understood that, in order to further improve the uniformity of the light-emitting spot and make the transition of the light spot smoother, in this embodiment, both the high light-transmitting structure 1 and the high light-reflecting structure 2 may be doped with corresponding scattering particles, specifically, the first scattering particles may be doped in a high light-transmitting material when the high light-transmitting structure 1 is manufactured, where a mass fraction of the first scattering particles may be 2% to 15%, and the second scattering particles are doped in a high light-reflecting material when the high light-reflecting structure 2 is manufactured, where a mass fraction of the second scattering particles may also be 2% to 15%, so that the light emitted from the light filling lamp onto the inner surface of the high light-reflecting structure 2 is reflected and scattered by the high light-reflecting structure 2 and then is incident onto the high light-transmitting structure 1, and the light emitted onto the high light-transmitting structure 1 is refracted and scattered when passing through the high light-transmitting structure 1, so as to ensure high reflectivity and high transmittance, further improve the uniformity of emergent light and fill light angle.
The first scattering particles and/or the second scattering particles in this embodiment may be spherical silica. Of course, the first scattering particles and/or the second scattering particles may also be other specific scattering particles, and which kind of scattering particles is specifically used may be determined according to actual needs, which is not particularly limited in this application.
It should be further noted that please refer to fig. 7 and 8, where fig. 7 is a schematic diagram of a light spot corresponding to a TIR lens in the prior art, and fig. 8 is a schematic diagram of a light spot corresponding to a light supplementing lens in this embodiment, it is clear that the light supplementing lens provided in this embodiment can not only improve the light utilization rate, but also improve the uniformity of the light emergent light spot, and the light emergent light spot of the light supplementing lens in this embodiment is a rectangular light spot, which can increase the effective area of light supplementing.
Further, the high light transmission material is one or more of polymethyl methacrylate (PMMA), Polystyrene (PS), methylpentene (NAS), and polyolefin ester (Zeonex).
Of course, the high light-transmitting material may further include a copolymer of styrene and acrylate (NAS), SAN, Polycarbonate (PC), methylpentene (TPX), ARTON and Cyclic Olefin Copolymer (COC), and it may be determined which one or more high light-transmitting materials are used to manufacture the high light-transmitting structure 1 according to actual needs, which is not particularly limited in this application.
Furthermore, the high-reflection material may be a mirror reflection material or a diffusion and semi-diffusion material, and of course, may also be other specific high-reflection materials, and it may be determined which kind or kinds of high-reflection materials are adopted to manufacture the high-reflection structure 2 according to actual needs, which is not particularly limited in this application.
In addition, the light filling lens that provides in this application can replace the light filling window in the conventional camera equipment through high light-transmitting structure 1 when using on camera equipment to realize camera equipment's waterproof demand.
It is thus clear that light filling lens in this application can set up in light filling lamp top when using, also the light filling lamp can set up in the through-hole of light filling lens's high reflecting structure cavity bottom, and the light that is in light filling lamp wide-angle range can reflect to setting up on the high light transmitting structure's of high reflecting structure top lower surface through high reflecting structure, then light jets out through high light transmitting structure again, because high reflecting structure's reflectivity is higher, high light transmitting structure's transmissivity is higher, so can improve the utilization ratio and the light-emitting efficiency of the light that originally sheltered from by the structure greatly, thereby improve the light filling effect.
On the basis of the above embodiment, an embodiment of the present invention further provides an image pickup apparatus including the fill-in lens described above.
It should be noted that the image capturing apparatus provided in this embodiment has the same beneficial effects as the light compensating lens provided in the foregoing embodiment, wherein for specific description of the light compensating lens in this embodiment, please refer to the foregoing embodiment, and details of this application are not repeated herein.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a light filling lens, its characterized in that, including high light transmission structure with set up in high reflection configuration of high light transmission structure below, wherein:
the light transmittance of the high light-transmitting structure is higher than that of the high-reflecting structure, the reflectivity of the high light-transmitting structure is lower than that of the high-reflecting structure, the high-reflecting structure is a cavity structure, and a through hole matched with the light supplementing lamp is formed in the bottom of the cavity structure, so that light emitted by the light supplementing lamp is reflected by the cavity wall and then enters the lower surface of the high light-transmitting structure.
2. A fill-in lens as claimed in claim 1, wherein the cavity is a rectangular paraboloid cavity.
3. A light supplementing lens as claimed in claim 1, wherein the upper surface of the high light transmitting structure is a free-form surface, and the lower surface of the high light transmitting structure is a flat surface.
4. A fill-in lens according to claim 3, wherein an upper surface of the top view of the high light-transmitting structure is a free-form surface having a rectangular boundary.
5. A fill-in lens according to any one of claims 1 to 4, wherein the high light-transmitting structure is made of a high light-transmitting material doped with first scattering particles and/or the high-reflecting structure is made of a high-reflecting material doped with second scattering particles.
6. A fill-in lens according to claim 5, wherein the high-light-transmittance material is one or more of polymethylmethacrylate, polystyrene, methylpentene and polyolefin resin.
7. A fill-in lens as claimed in claim 6, wherein the highly reflective material is a specular reflective material or a diffuse and semi-diffuse material.
8. A fill-in lens according to claim 5, wherein the mass fraction of the first scattering particles is 2% to 15%, and/or the mass fraction of the second scattering particles is 2% to 15%.
9. A fill-in lens according to claim 5, wherein the first scattering particles and/or the second scattering particles are spherical silica.
10. An image pickup apparatus comprising the fill-in lens according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910137587.3A CN111609378A (en) | 2019-02-25 | 2019-02-25 | Light filling lens and camera equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910137587.3A CN111609378A (en) | 2019-02-25 | 2019-02-25 | Light filling lens and camera equipment |
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| CN111609378A true CN111609378A (en) | 2020-09-01 |
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| CN201910137587.3A Pending CN111609378A (en) | 2019-02-25 | 2019-02-25 | Light filling lens and camera equipment |
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| CN115016200A (en) * | 2022-06-10 | 2022-09-06 | 杭州海康威视数字技术股份有限公司 | Reflective light supplementing device and camera |
| CN115220288A (en) * | 2022-07-26 | 2022-10-21 | 杭州海康威视数字技术股份有限公司 | Light supplementing device and security and protection equipment |
| CN115220288B (en) * | 2022-07-26 | 2023-12-15 | 杭州海康威视数字技术股份有限公司 | Light supplementing device and security protection equipment |
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Application publication date: 20200901 |