CN114630028A - Camera module and electronic equipment - Google Patents
Camera module and electronic equipment Download PDFInfo
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- CN114630028A CN114630028A CN202210199913.5A CN202210199913A CN114630028A CN 114630028 A CN114630028 A CN 114630028A CN 202210199913 A CN202210199913 A CN 202210199913A CN 114630028 A CN114630028 A CN 114630028A
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- 238000000576 coating method Methods 0.000 claims abstract description 90
- 239000011248 coating agent Substances 0.000 claims abstract description 88
- 230000005540 biological transmission Effects 0.000 claims abstract description 32
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- 238000003384 imaging method Methods 0.000 claims abstract description 9
- 230000003287 optical effect Effects 0.000 claims description 39
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- PBCFLUZVCVVTBY-UHFFFAOYSA-N tantalum pentoxide Inorganic materials O=[Ta](=O)O[Ta](=O)=O PBCFLUZVCVVTBY-UHFFFAOYSA-N 0.000 claims description 4
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 12
- 238000007747 plating Methods 0.000 description 70
- 238000002834 transmittance Methods 0.000 description 12
- 238000005553 drilling Methods 0.000 description 7
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- 238000013461 design Methods 0.000 description 4
- 238000002310 reflectometry Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 229910052681 coesite Inorganic materials 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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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
- G03B11/00—Filters or other obturators specially adapted for photographic purposes
- G03B11/04—Hoods or caps for eliminating unwanted light from lenses, viewfinders or focusing aids
- G03B11/045—Lens hoods or shields
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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
- G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/52—Elements optimising image sensor operation, e.g. for electromagnetic interference [EMI] protection or temperature control by heat transfer or cooling elements
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Blocking Light For Cameras (AREA)
Abstract
The application discloses module and electronic equipment make a video recording includes: the lens assembly, the image sensor and the light filtering coating structure; the image sensor is positioned on one side of the imaging end of the lens assembly; the filter coating structure is arranged on the lens component and has the reflection characteristic of laser in a specific wavelength range and the transmission characteristic of other laser outside the specific wavelength range. The application provides a camera module, through set up light filtering coating structure on the camera lens subassembly, the specific wavelength that easily causes the damage to image sensor on will light filtering coating structure appoints to clear away, make light filtering coating structure have the reflection characteristic to the laser of specific wavelength range, and to the transmission characteristic of other laser outside the specific wavelength range, when making a video recording the module and can guarantee laser shooting effect, will easily cause the laser of damage to image sensor can the abundant reflection, avoid causing the damage to image sensor.
Description
Technical Field
The application belongs to the technical field of electronic products, and particularly relates to a camera module and electronic equipment.
Background
Mobile phones have become popular consumer electronics products and a way to change people's lifestyle exists. Among them, the mobile phone camera module is one of the most commonly used functions.
In these scenes that have laser to exist, the camera module group on the existing electronic equipment does not have the energy of anti laser damage, and spot-shaped or cross-shaped failure area can be formed when meeting the irradiation of high-power laser, and damage can be formed because of the high-power density characteristic of laser.
Disclosure of Invention
The application aims at providing a module and electronic equipment of making a video recording, and the problem of the very easy formation damage of the high power density characteristic that the module of making a video recording meets with laser is solved.
In order to solve the technical problem, the present application is implemented as follows:
in a first aspect, an embodiment of the present application provides a camera module, including:
the lens assembly and the image sensor are positioned on one side of the imaging end of the lens assembly;
and the optical filtering coating structure is arranged on the lens component, and has the reflection characteristic of the laser in a specific wavelength range and the transmission characteristic of the other lasers outside the specific wavelength range.
In a second aspect, an embodiment of the present application provides an electronic device, including:
the equipment comprises an equipment body, a control device and a control device, wherein the equipment body is provided with a mounting groove which is provided with an opening;
the camera shooting module is characterized in that the image sensor is arranged in the mounting groove, and the lens component is arranged in the opening.
In the embodiment of this application, through set up the light filtering coating structure on the camera lens subassembly, the specific wavelength that easily causes the damage to image sensor on will filtering coating structure appoints to clear away, make light filtering coating structure have the reflection characteristic to the laser of specific wavelength range, and have the transmission characteristic to other laser outside the specific wavelength range, when making a video recording module can guarantee the laser shooting effect, will easily cause the laser of damage to image sensor and can fully reflect, avoid laser to cause the damage to image sensor, make a video recording module possess the function of anti laser damage.
Additional aspects and advantages of the present application 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 present application.
Drawings
The above and/or additional aspects and advantages of the present application 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 a schematic view of a camera module according to an embodiment of the present application;
fig. 2 is a schematic view of a laser irradiation of a camera module according to an embodiment of the present application;
FIG. 3 is a graph of film system transmittance for a first blue laser high reflection;
FIG. 4 is a graph of film transmittance for a second blue laser light with high reflection;
FIG. 5 is a graph of the transmittance of the film system for the first green laser light;
FIG. 6 is a graph of film system transmittance for high reflection of the second green laser;
FIG. 7 is a graph of film series transmittance for high reflectance of the first red laser light;
fig. 8 is a schematic view of a camera module according to another embodiment of the present application;
FIG. 9 is a graph of the transmittance of the film system at 445nm, 520nm and 638nm with high reflectivity;
FIG. 10 is a graph of the transmittance of the film system at 450nm and 525nm with high reflection;
FIG. 11 is a schematic structural view of a coating film provided according to an embodiment of the present application;
FIG. 12 is a schematic view of an electronic device provided in accordance with an embodiment of the present application;
reference numerals:
1. a lens assembly; 11. A cover plate; 12. A lens;
2. an image sensor; 3. A light filtering coating structure; 31. First coating;
32. second film coating; 33. Third coating; 6. A first refractive layer;
7. a second refractive layer; 8. A cavity layer; 9. An apparatus body;
10. and (3) a filter.
Detailed Description
Reference will now be made in detail to embodiments of the present application, 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 drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. 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 application.
The features of the terms first and second in the description and in the claims of the present application may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.
The following describes, with reference to fig. 1, a camera module provided according to an embodiment of the present application, where the camera module includes: lens subassembly 1, image sensor 2 and filter coating structure 3.
The lens assembly 1 is used for collecting light reflected by a photographed object. The image sensor 2 is a core device of the camera module, and can convert an optical signal into an electrical signal, and the image sensor 2 is located on one side of the imaging end of the lens component 1. The light filtering and coating structure 3 is disposed on the lens assembly 1, and the light filtering and coating structure 3 may be disposed at two ends of the lens assembly 1 or directly disposed in the lens assembly 1 according to the user's requirement. The filter coating structure 3 has the reflection characteristic of laser in a specific wavelength range and the transmission characteristic of other laser outside the specific wavelength range, wherein the laser in the specific wavelength range reaches the laser damage threshold of the image sensor, and the laser damage threshold represents an important parameter of the laser damage resistance of a medium irradiated by the laser. The high concentration of laser energy can cause local deformations in or on the surface of the medium or even damage it completely. From this when the module of making a video recording can guarantee the laser shooting effect, will easily cause the laser of damage to image sensor 2 and can the abundant reflection, avoid causing the damage to image sensor 2.
When the lens assembly 1 is not provided with the optical filtering coating structure 3, as shown in fig. 2, external laser light will converge through the lens assembly 1, the power density (optical power per unit area) of the laser light when reaching the lens assembly 1 is not very high, and when the laser light reaches the image sensor 2, the laser light is focused to the minimum, the power density reaches the maximum value, and the thermal accumulation effect of continuous laser light at this time may damage the image sensor 2.
And after setting up light filtering coating structure 3 in lens subassembly 1, when external laser sees through lens subassembly 1, light filtering coating structure 3 can fully reflect the laser that easily causes the damage to image sensor 2, transmits other laser simultaneously to can guarantee the laser and shoot the effect, avoid causing the damage to image sensor 2.
The application provides a camera module, through set up filtering coating structure 3 on camera lens subassembly 1, the specific wavelength that easily causes the damage to image sensor 2 on the filtering coating structure 3 is appointed to be clear away, make filtering coating structure 3 have the reflection characteristic to the laser of specific wavelength range, and have the transmission characteristic to other laser outside the specific wavelength range, when making a video recording the module and can guarantee laser shooting effect, the laser that will easily cause the damage to image sensor 2 can the abundant reflection, avoid causing the damage to image sensor 2.
Laser is used as a special light source, and has good monochromaticity. Based on this, for the photographing of the camera module, the interested visible light band generally refers to 400nm to 700nm, wherein 400 + 500nm is the blue band, 500 + 600nm is the green band, and 600 + 700nm is the red band. On the other hand, good monochromaticity means that the wavelength range of the laser light is very narrow. For example, for a red emitting he — ne laser, the wavelength distribution of the emitted light may be as narrow as 0.0000002 nm. Therefore, for the effective bandwidth of 400-700nm, the specific wavelength range corresponding to some laser can be designated and removed when the filter coating structure 3 is designed. Namely, a broadband high-transmission film with the wavelength of 400-700nm is designed, and holes are dug and removed for part of specified wavelengths.
In this embodiment, the specific wavelength range includes: the wavelength ranges corresponding to the blue specific laser, the green specific laser and the red specific laser. The blue specific laser, the green specific laser, and the red specific laser are lasers that are liable to cause damage to the image sensor.
The scene that the camera module group generates laser damage failure is mainly at the laser exhibition. While the laser source in the laser spread has two wavelengths, 445nm and 450nm, for the blue laser source, i.e. the blue specific laser includes: a first blue laser and a second blue laser, the first blue laser having a wavelength of about 445nm and the second blue laser having a wavelength of about 450nm, whereby the wavelength range of the first blue laser is determined to include: 445nm to 445.5nm, the wavelength range of the second blue laser light includes: 449.5nm to 450.5 nm. There are two wavelengths 520nm and 525nm for the green laser source, i.e. the green specific laser includes: a first green laser and a second green laser. The wavelength of the first green laser light is about 520nm, and the wavelength of the second green laser light is about 525nm, so that the wavelength range of the first green laser light is determined to comprise: 519.5nm to 520.5 nm. The wavelength range of the second green laser light includes: 524.5nm to 525.5 nm. And only 638nm for red laser source, i.e. red specific laser includes: a first red laser having a wavelength of about 638nm, the wavelength range of the first red laser including: 637.5nm to 638.5 nm.
In order to avoid damage to the image sensor in the laser exhibition scene, the narrow-band filter coating structure 3 is specially designed for the five wavelengths. The narrow-band design of the five wavelengths can be completed by respectively optimizing the design of the light filtering coating structure 3.
Specifically, holes are dug and removed according to the first blue laser at the wavelength of 445nm to 445.5nm in the optical filter coating structure 3, as shown in fig. 3, fig. 3 is a film system transmittance curve highly reflecting the first blue laser, it is not difficult to find that after removal, the optical filter coating structure 3 has the reflection characteristic aiming at the first blue laser and has the transmission characteristic of other lasers except the first blue laser, and the energy damage is found to be not more than 2nm, and at least the laser transmission of the wavelengths of 400nm to 440nm and 449nm to 700nm can be ensured.
According to the fact that holes are dug and removed according to the wavelengths 449.5nm to 450.5nm in the optical filter coating structure 3 by the second blue laser, as shown in fig. 4, fig. 4 is a film system transmittance curve highly reflecting the second blue laser, it is not difficult to find that after the holes are removed, the optical filter coating structure 3 has the reflection characteristic aiming at the second blue laser and has the transmission characteristic of other lasers except the second blue laser, and researches show that the energy damage does not exceed 2nm, and the laser transmission of the wavelengths 400nm to 445nm and 454nm to 700nm can be at least ensured.
According to the method, holes are dug and removed at the wavelength of 519.5nm to 520.5nm in the optical filtering coating structure 3 by the first green laser, as shown in fig. 5, fig. 5 is a film system transmittance curve highly reflecting the first green laser, it is easy to find that after the holes are removed, the optical filtering coating structure 3 has the reflection characteristic aiming at the first green laser and has the transmission characteristic of other lasers except the first green laser, and the research finds that the energy damage does not exceed 2nm, and at least the laser transmission at the wavelength of 400nm to 515nm and the laser transmission at the wavelength of 524nm to 700nm can be ensured.
According to the second green laser, the 524.5nm to 525.5nm wavelength in the optical filtering coating structure 3 is dug and removed, as shown in fig. 6, fig. 6 is a film system transmittance curve highly reflecting the second green laser, it is easy to find that after the removal, the optical filtering coating structure 3 has the reflection characteristic aiming at the second green laser and the transmission characteristic of other lasers except the second green laser, and the research finds that the energy damage is not more than 2nm, and the laser transmission of 400nm to 520nm and 529nm to 700nm wavelength can be at least ensured.
According to the method, holes are dug and removed at the wavelength of 637.5nm to 638.5nm in the optical filter coating structure 3 by the first red laser, as shown in fig. 7, fig. 7 is a film system transmittance curve highly reflecting the first red laser, it is not difficult to find that after the holes are removed, the optical filter coating structure 3 has the reflection characteristic aiming at the first red laser and the transmission characteristic of other lasers except the first red laser, and the research finds that the energy damage is not more than 2nm, and the laser with the wavelength of 400nm to 633nm and the laser with the wavelength of 642nm to 700nm can be ensured at least.
In this embodiment, holes are dug and removed at wavelengths of 445nm to 445.5nm, 449.5nm to 450.5nm, 519.5nm to 520.5nm, 524.5nm to 525.5nm, and 637.5nm to 638.5nm in the optical filter coating structure 3, so that the optical filter coating structure 3 has a reflection characteristic for the first blue laser, the second blue laser, the first green laser, the second green laser, and the first red laser, and has a transmission characteristic for the laser other than the first blue laser, the second blue laser, the first green laser, the second green laser, and the first red laser, and thus damage of the first blue laser, the second blue laser, the first green laser, the second green laser, and the first red laser to the image sensor can be avoided.
According to the electronic device of the embodiment of the present application, as shown in fig. 8, the optical filter coating structure 3 includes: a first plating film 31 and a second plating film 32. The first plating film 31 is provided on the lens block 1, and has a reflection characteristic for laser light in the first wavelength range and a transmission characteristic for other laser light outside the first wavelength range. The second plating film 32 is disposed on one side of the first plating film 31, and the second plating film 32 is disposed on the lens assembly 1, and has a reflection characteristic for the laser light in the second wavelength range and a transmission characteristic for the other laser light outside the second wavelength range. The first wavelength range and the second wavelength range constitute a wavelength range including: the wavelength ranges corresponding to the blue specific laser, the green specific laser and the red specific laser, that is, the wavelength range formed by the first wavelength range and the second wavelength range, are the wavelength ranges corresponding to the blue specific laser, the green specific laser and the red specific laser.
The first plating film 31 and the second plating film 32 may be disposed on any side of the lens assembly 1 as required according to design requirements, and may even be disposed directly in the lens assembly 1. Through set up first coating 31 on lens subassembly 1, can avoid first wavelength range laser to cause the damage to image sensor 2, continue to set up second coating 32 on this basis to can avoid second wavelength range laser to cause the damage to image sensor 2, the module of making a video recording can avoid blue specific laser, green specific laser and red specific laser to cause the damage to image sensor 2 from this.
Specifically, as shown in fig. 9 and 10, the first plating film 31 is subjected to hole drilling and removal for wavelengths of 445nm, 520nm and 638nm, that is, the width of 1nm corresponding to the center of 445nm, 520nm and 638nm on the first plating film 31 is high-reflection, in this embodiment, a narrow-band cut-off width of 1nm is selected, the laser with a specific wavelength is cut off, and the cut-off width is determined by comprehensively considering three factors of the light incident amount, the difficulty in designing the film system, and the drift of the laser wavelength. Thus, laser light with wavelengths of 444.5nm to 445.5nm, 519.5nm to 520.5nm and 637.5nm to 638.5nm is reflected, and at least laser light with wavelengths of 400nm to 440nm, 449nm to 515nm, 524nm to 633nm and 642nm to 700nm is transmitted. The 450nm and 525nm wavelengths are dug out on the second plating film 32, i.e., the high reflection is within 1nm width of the center of the second plating film 32 corresponding to the 450nm and 525nm settings. Therefore, 449.5nm to 450.5nm laser light with 524.5nm to 525.5nm wavelength is reflected, and at least 400nm to 445nm laser light, 451nm to 520nm laser light with 529nm to 700nm wavelength are transmitted.
In the camera module of the present embodiment, when the external laser light passes through the lens assembly 1, the first coating film 31 can reflect the laser light with the wavelengths of 444.5nm to 445.5nm, 519.5nm to 520.5nm, 637.5nm to 638.5nm, and transmit the laser light with the wavelengths of 400nm to 440nm, 449nm to 515nm, 524nm to 633nm, and 642nm to 700 nm. On the basis, the second plating film 32 reflects the laser with the wavelengths of 449.5nm to 450.5nm and 524.5nm to 525.5nm, so that the laser with the wavelengths of 440nm to 440nm, 451nm to 515nm, 529nm to 633nm and 642nm to 700nm transmits, the camera module can avoid the damage of the blue specific laser, the green specific laser and the red specific laser to the image sensor 2, and the proportion of the total lost energy of the 5 wavelengths in the whole visible light band of 400nm and 700nm is generally not more than 3%. And thus has very little effect on the overall amount of incoming light.
In other embodiments, the wavelengths of 445nm and 520nm may be removed by drilling on the first plating film 31, and the wavelengths of 450nm, 525nm, and 638nm may be removed by drilling on the second plating film 32, that is, the first plating film 31 has a high reflectivity within 1nm of the center of the 445nm and 520nm arrangement, and the second plating film 32 has a high reflectivity within 1nm of the center of the 450nm, 525nm, and 638nm arrangement, and the first plating film 31 and the second plating film 32 prevent the laser from damaging the image sensor 2.
Alternatively, the first plating film 31 is subjected to hole-drilling removal at wavelengths of 445nm, 525nm and 638nm, and the second plating film 32 is subjected to hole-drilling removal at wavelengths of 450nm and 520 nm. Namely, the reflection is high within a width of 1nm corresponding to the arrangement center of 445nm, 525nm, 638nm on the first plating film 31. The height within 1nm of the width of the center of the second plating film 32 corresponding to the 450nm and 520nm settings is high, and damage to the image sensor 2 by the laser is avoided by the first plating film 31 and the second plating film 32.
Or, the first plating film 31 is subjected to hole digging and removal for wavelengths of 445nm and 525nm, and the second plating film 32 is subjected to hole digging and removal for wavelengths of 450nm, 520nm and 638nm, that is, the first plating film 31 is high-reflective within the 1nm width corresponding to the arrangement center of 445nm and 525nm, and the second plating film 32 is high-reflective within the 1nm width corresponding to the arrangement center of 450nm, 520nm and 638nm, so that the first plating film 31 and the second plating film 32 prevent the image sensor 2 from being damaged by laser.
As shown in fig. 8, the lens assembly 1 includes: a lens 12. The camera module further comprises a filter 10. The lens 12 includes at least one lens for collecting light reflected from the object to be irradiated and generating high-intensity laser light when the laser light is incident thereon. The filter 10 is used to filter out the infrared beam. An image sensor 2 is arranged on one side of the imaging end of the lens 12, and the optical filter 10 is arranged between the lens 12 and the image sensor 2.
The first plating film 31 and the second plating film 32 may be disposed at any position on the lens assembly 1 facing the incident light, so that the first plating film 31 may be disposed on the lens 12 or the optical filter 10, the second plating film 32 may be disposed on the lens 12 or the optical filter 10, the first plating film 31 may be disposed at two ends of the lens 12 or the optical filter 10, or disposed in the lens 12 or the optical filter 10, and the second plating film 32 may be disposed at two ends of the lens 12 or the optical filter 10, or disposed in the lens 12 or the optical filter 10, and damage to the image sensor 2 caused by the laser may be avoided by disposing the first plating film 31 and the second plating film 32 on the lens 12 or the optical filter 10.
Based on the above embodiment, the lens assembly further includes: a cover plate 11. The cover plate 11 is a protective structure on one side of the lens 12. The cover plate 11 is arranged on the side of the lens 12 far away from the imaging end.
In this embodiment, the first plating film 31 may be disposed on any one of the lens 12, the filter 10, or the cover plate 11, and the second plating film 32 may be disposed on any one of the lens 12, the filter 10, or the cover plate 11. The first plating film 31 may be disposed at two ends of the cover plate 11, the lens 12, or the optical filter 10, or disposed in the cover plate 11, the lens 12, or the optical filter 10, and the second plating film 32 may be disposed at two ends of the cover plate 11, the lens 12, or the optical filter 10, or disposed in the cover plate 11, the lens 12, or the optical filter 10, where damage to the image sensor 2 caused by the laser may be avoided by disposing the first plating film 31 and the second plating film 32 on the cover plate 11, the lens 12, or the optical filter 10.
In order to simplify the processing technology of the coating, on the basis of the above embodiment, as shown in fig. 11, the filter coating structure 3 includes: a first plating film 31, a second plating film 32, and a third plating film 33. The first coating 31 is arranged on the lens assembly, and the first coating 31 has the reflection characteristic of laser in a first wavelength range and has the transmission characteristic of other laser outside the first wavelength range; the second coating 32 is positioned on one side of the first coating, and the second coating 32 is arranged on the lens component, has the reflection characteristic of the laser in the second wavelength range and has the transmission characteristic of other lasers outside the second wavelength range; the third coating 33 is positioned on one side of the first coating, and the third coating 33 is arranged on the lens assembly, has the reflection characteristic on the laser within the third wavelength range, and has the transmission characteristic on other lasers outside the third wavelength range; the first wavelength range, the second wavelength range, and the third wavelength range constitute wavelength ranges including: the wavelength ranges corresponding to the blue specific laser, the green specific laser and the red specific laser, that is, the wavelength ranges formed by the first wavelength range, the second wavelength range and the third wavelength range are the wavelength ranges corresponding to the blue specific laser, the green specific laser and the red specific laser.
The first plating film 31, the second plating film 32, and the third plating film 33 may be disposed on any side of the lens assembly 1 as needed, or may even be disposed directly in the lens assembly 1. Through set up first coating 31 on camera lens subassembly 1, can avoid laser to cause the damage to image sensor 2 in the first wavelength range, continue to set up second coating 32 to laser causes the damage to image sensor 2 in can avoiding the second wavelength range, continue to set up third coating 33 on this basis, can avoid laser to cause the damage to image sensor 2 in the third wavelength range, the module of making a video recording can avoid blue specific laser, green specific laser and red specific laser to cause the damage to image sensor 2 from this.
Specifically, the wavelengths of 445nm and 520nm are removed by drilling on the first plating film 31, that is, the first plating film 31 has a high reflectivity within 1nm of the width corresponding to the 445nm and 520nm centers. Therefore, laser with wavelengths of 444.5nm to 445.5nm and 519.5nm to 520.5nm is reflected, and at least laser with wavelengths of 400nm to 440nm, 449nm to 515nm and 524nm to 700nm is ensured to transmit. The 450nm and 525nm wavelengths are dug out on the second plating film 32, i.e., the high reflection is within 1nm width of the center of the second plating film 32 corresponding to the 450nm and 525nm settings. Therefore, 449.5nm to 450.5nm laser light with 524.5nm to 525.5nm wavelength is reflected, and at least 400nm to 445nm laser light, 451nm to 520nm laser light with 529nm to 700nm wavelength are transmitted. The third plating film 33 was removed by drilling at a wavelength of 638nm, that is, the third plating film 33 was highly reflective within 1nm of the width of the center set at a wavelength corresponding to 638 nm. Thus, 637.5-638.5 nm laser light is reflected, and at least 400 nm-633 nm laser light is transmitted, and 642 nm-700 nm laser light is transmitted.
When the external laser penetrates through the lens assembly 1, the first coating film 31 can reflect the laser with the wavelength of 444.5nm to 445.5nm, 519.5nm to 520.5nm, reflect the laser with the wavelength of 400nm to 440nm, 449nm to 515nm, and transmit the laser with the wavelength of 524nm to 700 nm. The second plating film 32 reflects laser beams with wavelengths of 449.5nm to 450.5nm and 524.5nm to 525.5nm on the basis, so that laser beams with wavelengths of 440nm to 440nm, 451nm to 515nm and 529nm to 700nm are transmitted, and the third plating film 33 reflects laser beams with wavelengths of 637.5nm to 638.5nm on the basis, so that laser beams with wavelengths of 440nm to 440nm, 451nm to 515nm, 529nm to 633nm and 642nm to 700nm are transmitted, so that the camera module can prevent the blue specific laser beam, the green specific laser beam and the red specific laser beam from damaging the image sensor 2.
Accordingly, the first plating film 31, the second plating film 32, and the third plating film 33 may be disposed on any one of the lens 12, the filter 10, or the cover plate 11, and the cover plate 11, the lens 12, or the filter 10 may be disposed with the first plating film 31, the second plating film 32, and the third plating film 33, so as to prevent the image sensor 2 from being damaged by the laser.
In order to simplify the processing technology of the coating, further, more coatings can be arranged, for example, a first coating, a second coating, a third coating, a fourth coating and the like are arranged at the same time, and all coatings are arranged on the lens component 1, so that the camera module can ensure the laser shooting effect, and meanwhile, laser which is easy to damage the image sensor 2 can be fully reflected, and damage to the image sensor 2 is avoided.
Based on the above embodiments, as shown in fig. 11, the first plating film, the second plating film, and even the third plating film may adopt a film stack design of 4, 6, and 8 cavity layers, and each includes: a cavity layer 8 and first and second refractive layers 6 and 7 alternately stacked. The first refraction layer 6 and the second refraction layer 7 are both provided with multiple layers, the film thickness coefficient of 0.6526 is adopted, and the cavity layer 8 is arranged between the first refraction layer 6 and the second refraction layer 7 which are adjacent. The refractive index of the first refractive layer 6 is greater than that of the second refractive layer 7. The first refractive layer 6 includes: a tantalum pentoxide layer. The tantalum pentoxide layer adopts high-refraction film material Ta2O5And the laser-resistant threshold of the film layer is increased. The second refractive layer 7 includes: a silicon dioxide layer. The silicon dioxide layer adopts low-refraction film material SiO2. The first coating film and the second coating film realize that the red, green and blue laser beams are cut off in a high-low refractive index stacking mode, and the influence of the laser on shooting is reduced.
When laser light is incident on the cavity layer 8, the first refractive layer 6, and the second refractive layer 7 having a plurality of layers of different materials at an angle phi and the laser light undergoes multiple reflections at interfaces between the layers, the phases may be uniform depending on the type and wavelength of the light source used and the optical thickness (product of refractive index and geometric thickness) of each layer, and the rates of reflected light may be coherent, thereby generating an interference effect between the layers. Whereby the first plating film and the second plating film have a reflection characteristic for the laser light in the specific wavelength range and have a transmission characteristic for the other laser light outside the specific wavelength range.
According to the electronic equipment that this application embodiment provided. The electronic equipment can be mobile phones, tablets, computers, electronic watches and other equipment.
Taking a mobile phone as an example, as shown in fig. 12, the electronic device includes: equipment body 9 and the module of making a video recording. The device body 9 is provided with a mounting groove having an opening. As shown in fig. 1, the camera module includes: lens subassembly 1, image sensor 2 and filter coating structure 3. The image sensor 2 is positioned at one side of the imaging end of the lens assembly 1. The image sensor 2 is arranged in the mounting groove, and the lens component 1 is arranged at the opening. The filter coating structure 3 is arranged on the lens component 1, the filter coating structure 3 has the reflection characteristic of laser in a specific wavelength range and has the transmission characteristic of other laser outside the specific wavelength range, the laser in the specific wavelength range can damage the image sensor 2, and therefore when the camera module can ensure the laser shooting effect, the laser which is easy to damage the image sensor 2 can be fully reflected, and damage to the image sensor 2 is avoided.
After setting up light filtering coating structure 3 in electronic equipment's camera lens subassembly 1, when external laser sees through camera lens subassembly 1, light filtering coating structure 3 can be with easily causing the laser of damage to image sensor 2 can the abundant reflection, with other laser transmission simultaneously to can guarantee the laser shooting effect, avoid causing the damage to image sensor 2.
According to the electronic equipment of this application embodiment, through set up filtering coating structure 3 on camera lens subassembly 1, appoint the specific wavelength that easily causes the damage to image sensor 2 on the filtering coating structure 3 and clear away, make filtering coating structure 3 have the reflection characteristic to the laser of specific wavelength range, and have the transmission characteristic to other laser outside the specific wavelength range, when making a video recording the module and can guarantee the laser shooting effect, the laser that will easily cause the damage to image sensor 2 can fully reflect, avoid causing the damage to image sensor 2.
In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. The utility model provides a module of making a video recording which characterized in that includes:
the lens assembly (1) and the image sensor (2), wherein the image sensor (2) is positioned on one side of the imaging end of the lens assembly (1);
the optical filtering coating structure (3) is arranged on the lens component (1), and the optical filtering coating structure (3) has the reflection characteristic of laser in a specific wavelength range and has the transmission characteristic of other laser outside the specific wavelength range.
2. The camera module of claim 1, wherein the specific wavelength range comprises: the wavelength ranges corresponding to the blue specific laser, the green specific laser and the red specific laser.
3. The camera module according to claim 2, characterized in that the filter coating structure (3) comprises:
a first coating film (31) provided on the lens assembly (1), having a reflection characteristic for laser light in a first wavelength range and having a transmission characteristic for other laser light outside the first wavelength range;
a second coating film (32) which is provided on the lens assembly (1) on one side of the first coating film (31), has a reflection characteristic for laser light in a second wavelength range, and has a transmission characteristic for other laser light outside the second wavelength range;
the first wavelength range and the second wavelength range constitute a wavelength range including: the wavelength ranges corresponding to the blue specific laser, the green specific laser and the red specific laser.
4. A camera module according to claim 3, characterized in that the lens assembly (1) comprises: a lens (11); the camera module also comprises an optical filter (10);
the image sensor (2) is arranged on one side of the imaging end of the lens (11); the optical filter (10) is arranged between the lens (11) and the image sensor (2);
the first coating film (31) is arranged on the lens (11) or the optical filter (10); the second coating film (32) is provided on the lens (11) or the optical filter (10).
5. The camera module of claim 4, wherein the lens arrangement (1) further comprises:
the cover plate (11) is arranged on one side of the lens (11) far away from the imaging end;
the first coating film (31) is arranged on any structure of the lens (11), the optical filter (10) or the cover plate (11); the second coating film (32) is arranged on any one structure of the lens (11), the optical filter (10) or the cover plate (11).
6. Camera module according to any one of claims 2-5, characterized in that the filter coating structure (3) comprises:
a first coating film (31) provided on the lens assembly (1), having a reflection characteristic for laser light in a first wavelength range and having a transmission characteristic for other laser light outside the first wavelength range;
a second coating film (32) which is arranged on one side of the first coating film (31) and is arranged on the lens component (1), and has the reflection characteristic of laser in a second wavelength range and the transmission characteristic of other laser outside the second wavelength range;
a third coating film (33) which is provided on the lens unit (1) on one side of the first coating film (31), has a reflection characteristic for laser light in a third wavelength range, and has a transmission characteristic for other laser light outside the third wavelength range;
the first, second, and third wavelength ranges comprise wavelength ranges that include: the wavelength ranges corresponding to the blue specific laser, the green specific laser and the red specific laser.
7. The camera module of any one of claims 2-5, wherein the blue specific laser comprises: a first blue laser and a second blue laser; the green specific laser includes: a first green laser and a second green laser; the red special laser comprises: a first red laser; the wavelength range of the first blue laser includes: 445nm to 445.5 nm; the wavelength range of the second blue laser includes: 449.5nm to 450.5 nm; the wavelength range of the first green laser includes: 519.5nm to 520.5 nm; the wavelength range of the second green laser light includes: 524.5nm to 525.5 nm; the wavelength range of the first red laser light includes: 637.5nm to 638.5 nm.
8. Camera module according to any one of claims 3 to 5, characterized in that the first and second coating films (31, 32) comprise:
a first refraction layer (6) and a second refraction layer (7) which are alternately stacked;
a cavity layer (8) disposed between the adjacent first and second refractive layers (6, 7); the refractive index of the first refractive layer (6) is greater than the refractive index of the second refractive layer (7).
9. The camera module according to claim 8, characterized in that the first refractive layer (6) comprises: a tantalum pentoxide layer; the second refraction layer (7) comprises: a silicon dioxide layer.
10. An electronic device, comprising:
the equipment comprises an equipment body (9) provided with a mounting groove, wherein the mounting groove is provided with an opening;
camera module according to any one of claims 1 to 9, the image sensor (2) being arranged in the mounting groove and the lens arrangement (1) being arranged in the opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210199913.5A CN114630028A (en) | 2022-03-01 | 2022-03-01 | Camera module and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210199913.5A CN114630028A (en) | 2022-03-01 | 2022-03-01 | Camera module and electronic equipment |
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| Publication Number | Publication Date |
|---|---|
| CN114630028A true CN114630028A (en) | 2022-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210199913.5A Pending CN114630028A (en) | 2022-03-01 | 2022-03-01 | Camera module and electronic equipment |
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| CN (1) | CN114630028A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034070A (en) * | 1987-12-28 | 1989-07-19 | 山东大学 | Total reflection laser shielding eye glass |
| US4917481A (en) * | 1988-06-06 | 1990-04-17 | Fibertek, Inc. | High intensity laser radiation protection |
| CN1439900A (en) * | 2001-12-24 | 2003-09-03 | 中国科学院光电技术研究所 | Laser protective film and production thereof |
| JP2019070537A (en) * | 2017-10-06 | 2019-05-09 | 三菱重工業株式会社 | Color sensor and laser system including color sensor |
| CN113810573A (en) * | 2021-09-09 | 2021-12-17 | Oppo广东移动通信有限公司 | Lens module, camera and terminal |
-
2022
- 2022-03-01 CN CN202210199913.5A patent/CN114630028A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034070A (en) * | 1987-12-28 | 1989-07-19 | 山东大学 | Total reflection laser shielding eye glass |
| US4917481A (en) * | 1988-06-06 | 1990-04-17 | Fibertek, Inc. | High intensity laser radiation protection |
| CN1439900A (en) * | 2001-12-24 | 2003-09-03 | 中国科学院光电技术研究所 | Laser protective film and production thereof |
| JP2019070537A (en) * | 2017-10-06 | 2019-05-09 | 三菱重工業株式会社 | Color sensor and laser system including color sensor |
| CN113810573A (en) * | 2021-09-09 | 2021-12-17 | Oppo广东移动通信有限公司 | Lens module, camera and terminal |
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