Beam splitter prism double-chip camera module
Through the spectroscopic prism dual-chip camera module, combined with RGB and infrared image sensors, the problem of insufficient light signals of telephoto lenses in dark field environments is solved, image quality and detail presentation are improved, and it is suitable for small mobile phone designs.
Patent Information
- Application Number
- CN202420144092.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-19
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-01-19
AI Technical Summary
The telephoto camera in a mobile phone receives less light signals in a dark field environment, resulting in an increase in noise, affecting image quality and clarity, and a small aperture cannot receive enough light, resulting in a decrease in image quality.
Using spectroscopic prism dual-chip camera module, including lens assembly, first prism and second prism, combined with RGB image sensor and infrared image sensor, enhance visible light transmittance through coaxial spectroscopic imaging, and enhance night shooting ability with infrared light .
Improves image quality in low-light environments, enhances contrast and detail presentation, reduces alignment and calibration steps, is compact in design, and is suitable for small phones without increasing the thickness of the phone.
Smart Images
Figure CN222262851U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of camera modules, in particular to a beam splitter prism dual-chip camera module. Background Art
[0002] Some telephoto cameras in mobile phones usually use smaller sensor sizes. Compared with the larger sensors of professional cameras, small sensors are more limited in receiving light. In dark environments, the sensor receives less light signals, which easily generates a lot of noise, which has a great impact on the quality and clarity of the captured images. At the same time, the aperture of mobile phone telephoto cameras is small and often cannot receive enough light. In dark environments, the scarcity of light will further increase the noise in the image. Therefore, it is necessary to propose a camera module that can improve the quality of the images captured by telephoto lenses in insufficient light environments. Utility Model Content
[0003] The utility model aims to provide a beam splitter prism dual-chip camera module, providing a camera module capable of improving the quality of pictures taken by a telephoto lens in an environment with sufficient light.
[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a beam splitter prism dual-chip camera module, comprising a lens assembly, the lens assembly comprising a lens and a mounting seat for fixing the lens, a receiving part is provided on one side of the lens assembly, the receiving part comprises a first prism, a second prism and a sensor group, the sensor group comprises at least one RGB image sensor and at least one infrared image sensor, the first prism has a right-angled triangle cross-section and is a light-increasing lens, the visible light in the light entering the lens passes through the first prism and the second prism to the RGB image sensor for imaging, and the non-visible light entering the lens passes through the first prism and the second prism to the infrared image sensor for imaging.
[0005] The beneficial effects of this program are:
[0006] The dual-chip structure of at least one RGB image sensor and at least one infrared image sensor is adopted. The camera module can capture infrared light that is invisible to the human eye, which has certain advantages for shooting in some special environments or special applications. The short infrared band has a special sensitivity to some surface details and textures. By fusing the information of visible light and short infrared bands, the contrast of the image can be enhanced and more details can be presented. The short infrared band has a certain penetration ability in night shooting, and even in low-light environments, some information can be obtained. By fusing with visible light images, the picture quality of night shooting can be improved and the content of the image can be enriched. The first prism adopts the design of a light-intensifying mirror, which helps to improve the transmittance of visible light, ensure that more visible light enters the RGB image sensor, and improve the brightness and clarity of the visible light image.
[0007] By setting up one lens as mentioned above and using two sensors to perform coaxial spectral imaging, the two sensors receive the same image information at the same time, avoiding the additional debugging and calibration steps that may be required when synthesizing the images of the two sets of lenses in the traditional way. The image information of the two sensors at the same time in this technical solution can be directly superimposed, thereby aligning the images more accurately without consuming more computing power for alignment and calibration.
[0008] Preferably, as an improvement, the cross-section of the second prism is also a right-angled triangle shape, and the hypotenuses of the first prism and the second prism are placed opposite to each other, and the sensor group includes an RGB image sensor and an infrared image sensor, the RGB image sensor is arranged at the right-angled edge of the first prism to receive light, and the infrared image sensor is arranged perpendicular to the RGB image sensor.
[0009] The beneficial effects are as follows: the relatively placed beveled edges allow for a more compact arrangement of optical elements in the vertical direction, thereby reducing the overall size and shortening the length of the camera module in the horizontal direction, which helps to design a more compact camera module; by vertically arranging the RGB image sensor and the infrared image sensor, the space can be more effectively utilized in the horizontal direction, thus avoiding mutual interference between visible light and infrared light, and helping to improve the clarity and accuracy of the image.
[0010] Preferably, as an improvement, a periscope portion is further provided on a side of the lens away from the sensor portion, and the periscope portion includes a turning prism and a fixing seat for fixing the turning prism.
[0011] The beneficial effect is: the light path is folded by setting a steering prism. Since the focal length of a general telephoto lens is long, in order to ensure the focusing effect, the length of the lens module is often long, which makes the body of the mobile phone thicker or part of the lens module must protrude from the body of the mobile phone, affecting the user experience. By setting a steering prism, the camera module in this solution can be vertically set in the body of the mobile phone, and the thickness of the mobile phone will not be significantly increased while the focal length of the lens is increased.
[0012] Preferably, as an improvement, the turning prism is fixedly connected to the fixing seat by glue.
[0013] The beneficial effects are: the glue can provide uniform support and fill in tiny gaps, ensuring a firm and stable connection between the turning prism and the fixing seat, and preventing loosening or vibration during use.
[0014] Preferably, as an improvement, the cross-section of the second prism is a parallelogram, the inclined surface of the second prism away from the lens is coated with a refractive film, the sensor group includes an RGB image sensor and an infrared image sensor, the RGB image sensor is arranged at the right angle side of the first prism to receive light, and the infrared image sensor and the RGB image sensor are located on the same horizontal plane.
[0015] The beneficial effect is that by arranging the infrared image sensor and the RGB image sensor to be located on the same horizontal plane, the height of the camera module is shortened to a certain extent, and it can be suitable for relatively light and thin mobile phones. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;
[0017] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present utility model;
[0018] Figure 3 This is a schematic diagram of the structure of Example 3 of the present utility model. DETAILED DESCRIPTION
[0019] The following is further described in detail through specific implementation methods:
[0020] The reference numerals in the drawings of the specification include: lens 1, mounting seat 2, first prism 3, second prism 4, RGB image sensor 5, infrared image sensor 6, steering prism 7, and fixing seat 8.
[0021] Example 1
[0022] Example 1 is basically as Figure 1 As shown, Figure 1 A beam splitter prism dual-chip camera module is shown, comprising a lens 1 assembly, the lens 1 assembly comprising a lens 1 and a mounting base 2 for fixing the lens 1, a mounting hole being provided at the center of the mounting base 2, the lens 1 being embedded in the mounting hole for positioning and installation, a receiving portion being provided on one side of the lens 1 assembly, the receiving portion comprising a first prism 3, a second prism 4 and a sensor group, the sensor group comprising at least one RGB image sensor 5 and at least one infrared image sensor 6, the first prism 3 having a right-angled triangle cross-section and being a light-increasing lens, the visible light in the light entering the lens 1 passes through the first prism 3 and the second prism 4 to the RGB image sensor 5 for imaging, and the non-visible light entering the lens 1 passes through the first prism 3 and the second prism 4 to the infrared image sensor 6 for imaging.
[0023] The cross section of the second prism 4 is also in the shape of a right triangle, and the hypotenuses of the first prism 3 and the second prism 4 are placed opposite to each other. In this embodiment, the sensor group includes an RGB image sensor 5 and an infrared image sensor 6. The RGB image sensor 5 is arranged at the right angle of the first prism 3 to receive light, and the infrared image sensor 6 is arranged perpendicular to the RGB image sensor 5. The oppositely placed hypotenuses allow the optical elements to be arranged more compactly in the vertical direction, reduce the overall size, shorten the length of the camera module in the horizontal direction, and help design a more compact camera module; by vertically arranging the RGB image sensor 5 and the infrared image sensor 6, the space is used more effectively, which helps to improve the clarity and accuracy of the image.
[0024] The specific implementation is:
[0025] The dual-chip structure of at least one RGB image sensor 5 and at least one infrared image sensor 6 is adopted. The camera module can capture infrared light that is invisible to the human eye, which has certain advantages for shooting in some special environments or special applications. The short infrared band has a special sensitivity to some surface details and textures. By fusing the information of visible light and short infrared bands, the contrast of the image can be enhanced and more details can be presented. The short infrared band has a certain penetration ability in night shooting, and even in low-light environments, some information can be obtained. By fusing with the visible light image, the picture quality of night shooting can be improved and the content of the image can be enriched. The first prism 3 adopts a light-intensifying mirror design, which helps to improve the transmittance of visible light, ensure that more visible light enters the RGB image sensor 5, and improve the brightness and clarity of the visible light image.
[0026] By setting up a lens 1 as mentioned above and using two sensors to perform coaxial spectral imaging, the two sensors receive the same picture information at the same time, thus avoiding the additional debugging and calibration steps that may be required when synthesizing the pictures of the two groups of lenses 1 in the traditional way. The picture information of the two sensors at the same time in the technical solution can be directly superimposed, so as to align the images more accurately without consuming more computing power for picture alignment and calibration.
[0027] Example 2
[0028] Example 2 is basically as Figure 2As shown, the difference between Example 2 and Example 1 is that a periscope portion is further provided on the side of the lens 1 away from the sensor portion, and the periscope portion includes a steering prism 7 and a fixing seat 8 for fixing the steering prism 7, and the steering prism 7 is fixedly connected to the fixing seat 8 by glue. The light path is folded by setting the steering prism 7. In general, due to the long focal length of the lens 1, the length of the lens 1 module is often long in order to ensure the focusing effect, which makes the body thickness of the mobile phone thicker or part of the lens 1 module must protrude from the mobile phone body, affecting the user's experience. Through the setting of the steering prism 7, the camera module in this scheme can be vertically arranged in the mobile phone body, and the thickness of the mobile phone will not be greatly increased while the focal length of the lens 1 is increased. The steering prism 7 is fixedly connected to the fixing seat 8 by glue, and the glue can provide uniform support and fill small gaps to ensure that the connection between the steering prism 7 and the fixing seat 8 is firm and stable, and prevent loosening or vibration during use.
[0029] Example 3
[0030] Example 3 is basically the same Figure 3 As shown, the difference between Example 3 and Example 2 is that the cross section of the second prism 4 is a parallelogram, the inclined surface of the second prism 4 away from the lens 1 is coated with a refractive film, and the sensor group includes an RGB image sensor 5 and an infrared image sensor 6. The RGB image sensor 5 is arranged at the right angle side of the first prism 3 to receive light, and the infrared image sensor 6 and the RGB image sensor 5 are located in the same horizontal plane. By arranging the infrared image sensor 6 and the RGB image sensor 5 in the same horizontal plane, the height of the camera module is shortened to a certain extent, and it can be applied to relatively thin mobile phones.
[0031] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.
Claims
1. A beam splitter prism dual-chip camera module, characterized in that: The invention comprises a lens assembly, which comprises a lens and a mounting seat for fixing the lens. A receiving part is provided on one side of the lens assembly, which comprises a first prism, a second prism and a sensor group. The sensor group comprises at least one RGB image sensor and at least one infrared image sensor. The first prism has a right triangle cross section and is a light-increasing lens. Visible light in the light entering the lens passes through the first prism and the second prism to form an image on the RGB image sensor, and non-visible light entering the lens passes through the first prism and the second prism to form an image on the infrared image sensor.
2. The beam splitter prism dual-chip camera module according to claim 1, characterized in that: The cross section of the second prism is also in the shape of a right triangle, and the hypotenuses of the first prism and the second prism are placed opposite to each other. The sensor group includes an RGB image sensor and an infrared image sensor. The RGB image sensor is arranged at the right angle of the first prism to receive light, and the infrared image sensor is arranged perpendicular to the RGB image sensor.
3. The beam splitter prism dual-chip camera module according to claim 1, characterized in that: A periscope portion is also provided on a side of the lens away from the sensor portion, and the periscope portion includes a steering prism and a fixing seat for fixing the steering prism.
4. The beam splitter prism dual-chip camera module according to claim 3, characterized in that: The steering prism is fixedly connected to the fixing seat by glue.
5. The beam splitter prism dual-chip camera module according to claim 1, characterized in that: The cross section of the second prism is a parallelogram shape, and the inclined surface of the second prism away from the lens is coated with a refractive film. The sensor group includes an RGB image sensor and an infrared image sensor. The RGB image sensor is arranged at the right angle side of the first prism to receive light, and the infrared image sensor and the RGB image sensor are located in the same horizontal plane.