CN110691176A - Filter assembly, camera module, image capturing device and electronic device - Google Patents
Filter assembly, camera module, image capturing device and electronic device Download PDFInfo
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- CN110691176A CN110691176A CN201810721913.0A CN201810721913A CN110691176A CN 110691176 A CN110691176 A CN 110691176A CN 201810721913 A CN201810721913 A CN 201810721913A CN 110691176 A CN110691176 A CN 110691176A
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- infrared light
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
- H04M1/0264—Details of the structure or mounting of specific components for a camera module assembly
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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
- H04N23/56—Cameras or camera modules comprising electronic image sensors; Control thereof provided with illuminating means
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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
- H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
Abstract
The invention discloses a light filtering component, a camera module, an image capturing device and an electronic device. The filter assembly of the embodiment of the invention comprises a filter, a band-pass coating film and a band-stop coating film. The band-pass coating is arranged on one surface of the optical filter and is used for only allowing visible light and infrared light to pass through. The band-elimination coating film is arranged on the other surface of the optical filter and is used for cutting off infrared light with a preset cut-off wave band. According to the filtering component provided by the embodiment of the invention, the band-pass coating film and the band-stop coating film are respectively arranged on the two surfaces of the optical Filter, so that visible light and infrared light with a specific wave band are allowed to pass through, the visible light and the infrared light can pass through no matter in the day or at night, the utilization scene of light is not limited, an ICR Filter is not required, and the size of imaging equipment is favorably reduced.
Description
Technical Field
The present invention relates to the field of imaging technologies, and in particular, to a filter assembly, a camera module, an image capturing device and an electronic device.
Background
The day and night confocal lens refers to the focus of the lens, and can be suitable for the daytime and night environments at the same time, and the focusing positions of the daytime and the night are consistent without refocusing. The light entering the lens in daytime consists of visible light (400 nm-700 nm), the night mode is an infrared light band (700 nm-1500 nm), and the infrared light source usually illuminates an object by means of infrared LED illumination carried by the device.
When the day and night confocal lens is used, an electromagnetic control switching Filter structure (ICR Filter) is needed to be matched so as to improve the color reality of the picture. And in daytime, the infrared ray detector is switched to an infrared cut-off sheet mode to allow visible light to pass through, but infrared rays cannot pass through. At night, the transparent glass is cut, and infrared light passes through the transparent glass at the same time, so that the clear effect can be seen at night. However, the filter structure cannot allow visible light and infrared light to pass through at the same time, so that the light utilization scene is limited.
Disclosure of Invention
The embodiment of the invention provides a light filtering component, a camera module, an image capturing device and an electronic device.
The filter assembly of the embodiment of the invention comprises a filter, a band-pass coating film and a band-stop coating film. The band-pass coating is arranged on one surface of the optical filter and is used for only allowing visible light and infrared light to pass through. The band-elimination coating film is arranged on the other surface of the optical filter and is used for cutting off infrared light with a preset cut-off wave band.
According to the filtering component provided by the embodiment of the invention, the band-pass coating film and the band-stop coating film are respectively arranged on the two surfaces of the optical Filter, so that visible light and infrared light with a specific wave band are allowed to pass through, the visible light and the infrared light can pass through no matter in the day or at night, the utilization scene of light is not limited, an ICR Filter is not required, and the size of imaging equipment is favorably reduced.
In some embodiments, the band of infrared light includes the predetermined cutoff band and a predetermined pass band, the predetermined pass band ranging from 930 nanometers to 950 nanometers, and the predetermined cutoff band ranging from 700 nanometers to 930 nanometers.
The filtering component only receives visible light and infrared light with a preset passing waveband (930 nanometers to 950 nanometers), and only allows the infrared light with the preset passing waveband to enter when visible light image shooting is carried out, so that the influence on visible light imaging is small, and the imaging quality is good.
In some embodiments, the filter comprises an object side surface and an image side surface, the bandpass coating is disposed on the object side surface, and the band-stop coating is disposed on the image side surface
Therefore, the band-pass coating film and the band-stop coating film can be respectively arranged on the object side surface and the image side surface of the optical filter, and the optical filtering effect is good.
In some embodiments, the bandpass coating has a transmittance of greater than 85% for light in the 400nm to 955 nm band and the band-stop coating has a transmittance of less than 15% for light in the 700nm to 925 nm band.
As such, by setting a high transmittance between 400nm and 955 nm for the through-band plating film and a low transmittance between 700nm and 925 nm for the barrier-band plating film, the transmittances in the visible light band of 400nm to 700nm and the predetermined pass band of 925 nm to 955 nm are made high. A redundant waveband is arranged between 930 nm and 950 nm, namely the predetermined passing waveband, so that errors caused by manufacturing of the coating film are reduced, the passing rate of infrared light between 925 and 955 wavebands is ensured, and the penetration rate of the infrared light in the predetermined passing waveband is ensured.
The camera module of the invention comprises an image sensor, a lens component and the filter component of any of the above embodiments. The lens component, the light filtering component and the image sensor are sequentially arranged along the light incidence direction.
According to the camera module, the band-pass coating film and the band-stop coating film are respectively arranged on the two surfaces of the optical Filter, visible light and infrared light of a specific waveband are allowed to pass through, so that the visible light and the infrared light can pass through the camera module in the daytime or at night, the utilization scene of light is not limited, an ICR Filter is not required, and the size of imaging equipment is favorably reduced.
The image capturing device of the present invention includes an infrared light source and the camera module according to any of the above embodiments. The infrared light source is used for emitting infrared light. The camera module is used for receiving visible light and the infrared light.
The image capturing device provided by the embodiment of the invention allows visible light and infrared light of a specific waveband to pass through by respectively arranging the band-pass coating film and the band-stop coating film on the two surfaces of the optical Filter, so that the visible light and the infrared light can pass through the image capturing device in daytime or at night, the utilization scene of light rays is not limited, an ICR Filter is not required, and the size of imaging equipment is favorably reduced.
In some embodiments, the infrared light source is an infrared fill light, and the camera module receives visible light to acquire a visible light image when the infrared light source does not emit infrared light. When the infrared light source emits infrared light, the camera module receives visible light to acquire a visible light image and receives the infrared light to acquire an infrared image.
Therefore, the image capturing device can accurately acquire the visible light image of the target object and can acquire the visible light image and the infrared image of the target object simultaneously.
In some embodiments, the infrared light source is a structured light projector and is configured to emit an infrared light pattern, and the camera module receives visible light to capture a visible light image when the infrared light source is not emitting the infrared light pattern. When the infrared light source emits the infrared light pattern, the camera module receives visible light to obtain a visible light image and receives the infrared light pattern formed by the infrared light pattern modulated by the shot object to obtain a depth image.
Therefore, the image capturing device can accurately acquire the visible light image of the target object and can acquire the visible light image and the depth image of the target object at the same time.
In some embodiments, the image capturing apparatus further includes a processor, the number of the camera modules is plural, each camera module receives visible light to acquire the visible light image, receives the infrared light pattern reflected by the subject to identify the positions of the feature points in the visible light image, and the processor processes the visible light image based on a binocular range finding algorithm according to the positions of the feature points to obtain the depth image.
So, both can acquire the visible light image, can acquire the depth map according to binocular range finding algorithm again, and thereby because utilize the structured light projector to throw out the characteristic point position of many images that the infrared light pattern can assist the quick determination, be favorable to promoting the efficiency of utilizing binocular range finding in order to acquire the depth map.
The electronic device of the embodiment of the invention comprises a shell and the image capturing device of any one of the embodiments. The image capture device is disposed within the housing and exposed from the housing to capture an image.
According to the electronic device provided by the embodiment of the invention, the band-pass coating film and the band-stop coating film are respectively arranged on the two surfaces of the optical Filter, so that visible light and infrared light with a specific waveband can pass through the electronic device, the utilization scene of light rays can not be limited no matter the visible light and the infrared light can pass through the electronic device in daytime or at night, an ICR Filter is not required to be arranged, and the size of imaging equipment can be reduced.
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 embodiments 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 a schematic structural diagram of an electronic device according to an embodiment of the invention;
FIG. 2 is a schematic structural diagram of an image capturing device according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a camera module according to an embodiment of the invention;
FIG. 4 is a schematic structural diagram of a filter assembly according to an embodiment of the present invention;
FIG. 5 is a schematic view of an image capturing device according to an embodiment of the present invention;
fig. 6 to 7 are schematic structural views of an image capturing apparatus according to another embodiment of the present invention; and
fig. 8 to 9 are schematic structural views of an image capturing apparatus according to still another embodiment of the present invention.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. The same or similar reference numbers in the drawings identify the same or similar elements or elements having the same or similar functionality throughout.
In addition, the embodiments of the present invention described below with reference to the accompanying drawings are exemplary only for the purpose of explaining the embodiments of the present invention, and are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Referring to fig. 1, an electronic device 1000 according to an embodiment of the invention includes a housing 200 and an image capturing device 100. The electronic device 1000 may be a monitoring camera, a mobile phone, a tablet computer, a laptop computer, a game machine, a head display device, an access control system, a teller machine, etc., and the embodiment of the present invention is described by taking the electronic device 1000 as a mobile phone, it is understood that the specific form of the electronic device 1000 may be other, and is not limited herein. The image capturing apparatus 100 is disposed on the housing 200 to capture an image, and specifically, the image capturing apparatus 100 is disposed in the housing 200 and exposed from the housing 200, the housing 200 can provide protection for the image capturing apparatus 100, such as dust-proof, waterproof, and anti-falling, and the housing 200 is provided with a hole corresponding to the image capturing apparatus 100, so that light can pass through the hole or penetrate into the housing 200.
Referring to fig. 2, the image capturing apparatus 100 includes a camera module 10, an infrared light source 20, and a processor 30.
Referring to fig. 3, the camera module 10 includes a substrate 11, a filter assembly 12, an image sensor 14, a lens holder 15 and a lens assembly 16. The lens assembly 16 is disposed on the image sensor 14 and corresponds to the image sensor 14. The filter assembly 12 is disposed within the lens assembly 16 and corresponds to the image sensor 14. The lens assembly 16, the filter assembly 12, and the image sensor 14 are sequentially disposed along the light incident direction. The filter assembly 12 filters light entering from the lens assembly 16 such that the filtered light enters the image sensor 14.
Referring to fig. 3 and 4, the filter assembly 12 includes a filter 122, a bandpass coating 124 and a bandstop coating 126. The bandpass coating 124 is used to allow only visible light and infrared light to pass through. The band-stop coating film 126 is used to cut off infrared light of a predetermined cut-off band.
The filter 122 includes an object side 1222 and an image side 1224, and the filter 122 is a full-transmission glass sheet and has high transmittance. In this embodiment, the bandpass coating film 124 is provided on the object side 1222, and the band stop coating film 126 is provided on the image side 1224. During imaging, light enters from the lens assembly 16 and passes through the bandpass coating 124, the filter 122 and the band-stop coating 126 on the image side 1224 in sequence, and when passing through the bandpass coating 124, light other than visible light and infrared light in the light is filtered, in other words, only visible light and infrared light can pass through the bandpass coating 124, and then the visible light and infrared light pass through the filter 122 and reach the band-stop coating 126, infrared light in a predetermined cut-off band is filtered, so that only visible light and infrared light in the predetermined pass-through band pass through and reach the image sensor 14 for imaging. In other embodiments, the filter assembly 12 may be reversed to be combined with the lens assembly 16, that is, the band-stop coating 126 is disposed on the object side 1222, and the band-pass coating 124 is disposed on the image side 1224, in which the light passes through the band-stop coating 126, the filter 122, and the band-pass coating 124 in sequence to reach the image sensor 14 for imaging, when the light passes through the band-stop coating 126, the infrared light of the predetermined cut-off band is filtered, and the light except the infrared light of the predetermined cut-off band passes through the filter 122 and reaches the band-pass coating 124, and after the band-pass coating 124, only the visible light and the infrared light of the predetermined pass-through band pass through and enter the image sensor 14 for. In the embodiment of the invention, the infrared light is 700nm to 950 nm, the predetermined passing waveband is 930 nm to 950 nm, and the predetermined cutoff waveband is 700nm to 930 nm. That is, the filter element 12 only allows 930 nm to 950 nm infrared light and visible light (400nm to 700nm) to pass through to the image sensor 14 for imaging.
The band-pass coating 124 has a transmittance of more than 85% for light in a wavelength range of 400nm to 955 nm, and the band-stop coating 126 has a transmittance of less than 15% for light in a wavelength range of 700nm to 925 nm.
Since the band-pass plating film 124 has a high transmittance for light between 400nm and 955 nm, and the band-stop plating film 126 has a low transmittance for light between 700nm and 925 nm, the transmittances of the visible light band of 400nm to 700nm and the predetermined pass band of 925 nm to 955 nm are high. Redundant wave bands (namely 925 nm to 930 nm and 950 nm to 955 nm) are arranged in 930 nm to 950 nm, namely the predetermined passing wave band, so that errors caused by manufacturing of the coating film are reduced, the passing rate of infrared light in 925 to 955 nm is ensured, and the penetration rate of the infrared light in the predetermined passing wave band is ensured.
The Filter assembly 12 according to the embodiment of the present invention allows visible light and infrared light of a specific wavelength band to pass through by respectively disposing the band-pass coating film 124 and the band-stop coating film 126 on two surfaces of the Filter 122, so that the visible light and the infrared light can pass through at daytime and nighttime, the light utilization scene is not limited, and an ICR Filter is not required, which is beneficial to reducing the volume of an imaging device.
Referring to fig. 3, the substrate 11 may be a flexible circuit board, a hard circuit board or a rigid-flex board, and has a wide application range. The image sensor 14 is disposed on the substrate 11 and electrically connected to the substrate 11, and the image sensor 14 is used for receiving light to form an image. The image sensor 14 may be a Complementary Metal Oxide Semiconductor (CMOS) image sensor chip or a Charge-coupled Device (CCD) image sensor chip.
A mirror mount 15 is disposed on the substrate 11, and a lens assembly 16 is mounted on an end of the mirror mount 15 remote from the substrate 11. Lens assembly 16 includes a barrel 162 and a lens group 164. The lens barrel 162 is combined with the lens base 15 and forms a receiving cavity 110 together with the substrate 11. The connection method of the lens barrel 162 and the lens holder 15 includes screwing, gluing, engaging, and the like. The lens assembly 164, the filter assembly 12 and the photosensitive element 144 are all accommodated in the accommodating cavity 110, and the lens assembly 164, the filter assembly 12 and the photosensitive element 144 are sequentially arranged along the light-incident path. Lens group 164 may be a single lens, either a convex lens or a concave lens; or the lens is a plurality of lenses which can be convex lenses or concave lenses, or part of the lenses is convex lenses and part of the lenses is concave lenses.
The lens assembly 16 is configured with a suitable lens having the same focal length in the visible light band and the predetermined pass band, for example, the lens assembly 16 is a day and night confocal lens. In this way, clear images can be obtained in different environments (day and night) without refocusing.
The camera module 10 according to the embodiment of the invention allows visible light and infrared light of a predetermined passing waveband to pass through by respectively arranging the band-pass coating film 124 and the band-stop coating film 126 on the two surfaces of the optical Filter 122, so that the visible light and the infrared light can pass through no matter in daytime or at night, the utilization scene of light is not limited, an ICR Filter is not required, and the volume of the imaging device is favorably reduced.
Referring to fig. 2 and 5, the infrared light source 20 is used for emitting infrared light. In one example, the infrared light source 20 is a structured light projector 22, and the image capturing apparatus 100 may have a collecting window 40 corresponding to the camera module 10 and a projecting window 50 corresponding to the structured light projector 22. The structured light projector 22 is configured to project an infrared light pattern through the projection window 50 toward the target space, and the camera module 10 is configured to receive visible light and the infrared light pattern of a predetermined pass wavelength band to image. When the structured light projector 22 does not emit light, visible light and infrared light of a predetermined passing waveband can enter to acquire a visible light image, and because only the infrared light of the predetermined passing waveband enters the image sensor 14 together with the visible light to form an image, the imaging quality of the visible light image is not greatly affected, preferably, as shown in fig. 5, the structured light projector 22 is turned off when visible light photographing is performed, so that the infrared light entering the camera module 10 is reduced, and the imaging quality of the visible light is improved. When the structured light projector 22 emits light, for example, the structured light projector 22 emits an infrared light pattern as a speckle pattern, and the camera module 10 is configured to collect a visible light image through the collection window 40, where the visible light image includes a bright point formed by the speckle pattern, and the bright point is modulated by a subject and then received by the camera module 10 to be formed in the visible light image. The processor 30 is connected to the camera module 10 and the structured light projector 22, and the processor 30 is configured to process the visible light image to obtain a depth image. Specifically, the processor 30 forms a bright spot image by extracting a bright spot in the visible light image, compares the bright spot pattern with a reference pattern, and obtains depth information of different bright spots according to differences between the bright spot image and the reference pattern, such as changes in size, shape, and brightness of the bright spot, thereby forming a depth image. In another embodiment, the infrared light pattern is a coded structured light image with a specific pattern, i.e. a specific code, and the depth image is obtained by extracting the coded structured light image from the visible light image and comparing the extracted coded structured light image with the reference pattern. The depth image can be synthesized with the visible light image to generate a 3D image after being obtained, so that the method can be applied to the fields of 3D modeling, face recognition and the like.
In another example, the infrared light source 20 is an infrared fill-in lamp 24, and when the infrared fill-in lamp 24 does not emit infrared light (as shown in fig. 6), the camera module 10 receives visible light to obtain a visible light image; when the infrared fill-in light 24 emits infrared light (see fig. 7), the camera module 10 receives visible light to obtain a visible light image and receives infrared light to obtain an infrared image. In this way, the camera module 10 can acquire a visible light image and an infrared image.
The image capturing apparatus 100 according to the embodiment of the invention allows visible light and infrared light of a predetermined passing band to pass through by respectively disposing the band-pass coating film 124 and the band-stop coating film 126 on two surfaces of the filter 122, so that the visible light and the infrared light can pass through at daytime and nighttime, the light utilization scene is not limited, and the ICRFilter is not required, which is beneficial to reducing the volume of the imaging device.
Referring to fig. 8 and 9, in some embodiments, the image capturing apparatus 100 includes a plurality of camera modules 10 according to any of the above embodiments, an infrared light source 20 (in this case, the infrared light source 20 is a structured light projector 22), and a processor 30. The number of the camera modules 10 can be two or more than two, and when the number of the camera modules is two, the two camera modules can form a binocular imaging system; when the number of the camera modules 10 is greater than two, a plurality of camera modules 10 may form a multi-view imaging system. The embodiment of the present invention is described with the number of the camera modules 10 being two, and the principle that the number of the camera modules 10 is multiple is similar, and will not be described herein again.
The structured light projector 22 is disposed between the two camera modules 10, and when capturing images, the two images can be acquired simultaneously, and the capturing ranges of the two images are different, and the processor 30 can combine the two images into one visible light image with a larger capturing range, preferably, as shown in fig. 8, when capturing only the visible light image, the structured light projector 22 can be turned off to reduce interference of infrared light, and improve the imaging effect of the visible light image. In other embodiments, when the number of camera modules is large enough, a panoramic camera may be configured to acquire panoramic images. When the depth image is acquired, the view field ranges of the two cameras need to be overlapped a little and the object needs to fall into the overlapped view field range to acquire the depth information, two images containing the object are obtained by the two camera modules, the processor 30 compares the same parts of the two images in the shooting scene to determine all the corresponding characteristic positions in the two images, at this time, because of the infrared light pattern (such as speckle pattern) emitted by the structured light projector 22, therefore, infrared light patterns exist in the obtained images, at the moment, when the characteristic positions are determined through characteristic comparison, the characteristic point comparison can be carried out through the infrared light patterns in the two obtained images, so that the characteristic point positions corresponding to the two images are rapidly determined, and finally, the depth information of the shot object is rapidly acquired according to the visual angle difference and the corresponding characteristic point positions of the two images based on a binocular distance measurement algorithm so as to form a depth image. Therefore, the efficiency of obtaining the depth image can be improved, the structured light projector 22 is located between the two camera modules 10, and the infrared light pattern emitted by the structured light projector 22 basically covers the object to be shot, which is beneficial to obtaining the depth image. Of course, the structured light projector 22 may be disposed outside the two camera modules 10, and may be designed according to the structure of the electronic device 1000. After the depth image is acquired, the visible light images of the region overlapped with the two image field ranges can be synthesized to obtain a three-dimensional image, and the method can be applied to three-dimensional modeling, face recognition and the like.
In the description of the specification, reference to the terms "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" 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 invention. In this specification, schematic representations of the above terms 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.
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, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, unless specifically limited otherwise.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention, which is defined by the claims and their equivalents.
Claims (10)
1. A light filtering assembly, comprising:
an optical filter;
the band-pass coating is arranged on one surface of the optical filter and is used for only allowing visible light and infrared light to pass through; and
and the band-elimination coating film is arranged on the other surface of the optical filter and is used for cutting off infrared light with a preset cut-off wave band.
2. The filter assembly of claim 1, wherein the band of infrared light includes the predetermined cutoff band and a predetermined pass band, the predetermined pass band ranging from 930 nanometers to 950 nanometers, and the predetermined cutoff band ranging from 700 nanometers to 930 nanometers.
3. The filter assembly of claim 1, wherein the filter includes an object side surface and an image side surface, the bandpass coating is disposed on the object side surface, and the band-stop coating is disposed on the image side surface.
4. The filter assembly of claim 1, wherein the bandpass coating has a transmittance of greater than 85% for light in the 400nm to 955 nm wavelength band and the band-stop coating has a transmittance of less than 15% for light in the 700nm to 925 nm wavelength band.
5. A camera module, comprising:
an image sensor;
a lens assembly; and
the filter assembly of any one of claims 1 to 4, wherein the lens assembly, the filter assembly and the image sensor are sequentially disposed along a light incident direction.
6. An image capturing apparatus, comprising:
an infrared light source for emitting infrared light; and
the camera module of claim 5, the camera module to receive visible light and the infrared light.
7. The image capturing device as claimed in claim 6, wherein the infrared light source is an infrared fill-in lamp,
when the infrared light source does not emit infrared light, the camera module receives visible light to acquire a visible light image;
when the infrared light source emits infrared light, the camera module receives visible light to acquire a visible light image and receives the infrared light to acquire an infrared image.
8. The image capturing apparatus of claim 6, wherein the infrared light source is a structured light projector for emitting an infrared light pattern,
when the infrared light source does not emit the infrared light pattern, the camera module receives visible light to acquire a visible light image;
when the infrared light source emits the infrared light pattern, the camera module receives visible light to obtain a visible light image and receives the infrared light pattern formed by the infrared light pattern modulated by the shot object to obtain a depth image.
9. The image capturing apparatus of claim 8, wherein the image capturing apparatus further comprises a plurality of camera modules, each camera module receives visible light to obtain the visible light image, receives the infrared light pattern reflected by the subject for identifying the positions of the feature points in the visible light image, and processes the visible light image based on a binocular distance measuring algorithm according to the positions of the feature points to obtain the depth image.
10. An electronic device, comprising:
a housing; and
the image capturing apparatus of any one of claims 6 to 9, wherein the image capturing apparatus is disposed on the housing to capture an image.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810721913.0A CN110691176A (en) | 2018-07-04 | 2018-07-04 | Filter assembly, camera module, image capturing device and electronic device |
| PCT/CN2019/090823 WO2020007169A1 (en) | 2018-07-04 | 2019-06-12 | Filtering assembly, camera module, image capturing device and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810721913.0A CN110691176A (en) | 2018-07-04 | 2018-07-04 | Filter assembly, camera module, image capturing device and electronic device |
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| CN110691176A true CN110691176A (en) | 2020-01-14 |
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| CN201810721913.0A Withdrawn CN110691176A (en) | 2018-07-04 | 2018-07-04 | Filter assembly, camera module, image capturing device and electronic device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111323124A (en) * | 2020-04-02 | 2020-06-23 | 四川双利合谱科技有限公司 | Broadband hyperspectral camera with mounting structure and film coating method thereof |
| CN113242364A (en) * | 2021-03-29 | 2021-08-10 | 杭州涂鸦信息技术有限公司 | Black light camera |
| WO2023125087A1 (en) * | 2021-12-30 | 2023-07-06 | 华为技术有限公司 | Image processing method and related apparatus |
| CN116893513A (en) * | 2023-09-08 | 2023-10-17 | 深圳市安思疆科技有限公司 | Structured light generator and pattern coding projector |
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2018
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| CN111323124B (en) * | 2020-04-02 | 2024-02-20 | 江苏双利合谱科技有限公司 | Broadband hyperspectral camera with mounting structure and film coating method thereof |
| CN113242364A (en) * | 2021-03-29 | 2021-08-10 | 杭州涂鸦信息技术有限公司 | Black light camera |
| WO2023125087A1 (en) * | 2021-12-30 | 2023-07-06 | 华为技术有限公司 | Image processing method and related apparatus |
| CN116893513A (en) * | 2023-09-08 | 2023-10-17 | 深圳市安思疆科技有限公司 | Structured light generator and pattern coding projector |
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Application publication date: 20200114 |