Periscope camera module

Abstract

The utility model relates to periscopic camera field discloses a periscopic camera module, including lens, plane mirror, diaphragm and image sensor, plane mirror is set up obliquely, light is in turn through lens, plane mirror and diaphragm finally projects on image sensor, and image sensor is used for converting digital signal for light signal. With keeping high resolution imaging, reducing the volume of camera module, reducing the cost of periscopic module and optimizing the stray light problem of periscopic module.

Description

Technical Field

[0001] This utility model relates to the field of periscope cameras, specifically to a periscope camera module. Background Technology

[0002] Currently, with the increasing miniaturization and compactness of mobile phones and other electronic devices, and the gradual development of camera technology, periscope mobile phone camera modules are widely used. A periscope camera is an optical system that differs from ordinary cameras. In order to meet the needs of telephoto shooting and miniaturization of the entire device, the entire system adopts a single or multiple optical path to obtain higher optical magnification shooting effects.

[0003] However, with the continuous development of multi-fold periscopes, the processing technology and cost of prisms have been rising, making it increasingly difficult to control stray light in the overall imaging of the module, resulting in multi-fold periscopes only being usable in some high-end models.

[0004] In existing technologies, telephoto periscope camera modules mostly use prisms of different shapes to achieve light path reversal. Due to the increased magnification required by the market and the lengthening of product focal lengths, the number of refractions of the prisms has increased, and the manufacturing process has become more complex. In order to maintain high-quality imaging, the industry usually uses prism screen printing and grooving or overall black plating of the bracket to eliminate stray light. This has caused the cost of prisms to rise sharply, which is one of the reasons why telephoto periscope cameras have not been widely adopted in low-end and mid-range models. Utility Model Content

[0005] The present invention aims to provide a periscope camera module that maintains high-resolution imaging while reducing the size of the camera module, lowering the cost of the periscope module, and optimizing the stray light problem of the periscope module.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a periscope camera module, comprising a lens, a plane mirror, a light-blocking aperture, and an image sensor. The plane mirror is tilted, and light passes sequentially through the lens, the plane mirror, and the light-blocking aperture before being projected onto the image sensor. The image sensor is used to convert the light signal into a digital signal.

[0007] The beneficial effects of this plan are:

[0008] 1. This utility model patent proposes a novel periscope camera module that aims to maintain high-resolution imaging while reducing the size of the camera module, lowering the cost of the periscope module, and optimizing the stray light problem of the periscope module.

[0009] 2. Plane mirrors, while cost-effective compared to prisms, achieve the same optical parameters and image quality as existing prism-based structures on the market. A light-blocking aperture, by adjusting the aperture size and shape of the attached component, effectively blocks stray light from the system. Its advantages lie in its adjustable position, ease of manufacturing, and simplified process. This solution uses a plane mirror instead of a prism to effectively reduce costs. Simultaneously, the use of a light-blocking aperture reduces process complexity while precisely blocking stray light. This allows the telephoto periscope camera to achieve high-quality imaging while reducing costs.

[0010] 3. This solution breaks away from the limitations of improving existing multi-prism periscope camera solutions. It utilizes the reflective properties and low cost of planar mirrors. By controlling the light-blocking aperture between the planar mirror and the image sensor, it effectively ensures high-resolution imaging while reducing size and cost.

[0011] Furthermore, the plane mirror is installed at an angle of 37°-43° relative to the optical axis of the lens.

[0012] Furthermore, a sawtooth-shaped light-extinguishing structure is provided between the image sensor and the light-shielding aperture. The light path is reflected sequentially at the end of the plane mirror and the sawtooth-shaped light-extinguishing structure near the image sensor, and then projected onto the image sensor.

[0013] Furthermore, the light-shielding aperture includes a support and an attachment plate, which is a light-shielding paper or a Soma sheet.

[0014] Furthermore, the inner side of the Soma tablet is serrated.

[0015] Furthermore, a filter is provided between the image sensor and the light-shielding aperture.

[0016] Furthermore, the filter is an infrared cutoff filter.

[0017] Furthermore, the plane mirror uses a metal with a dielectric coating.

[0018] Furthermore, the coating metal is silver or aluminum.

[0019] This solution also has the following effects:

[0020] 1. Plane mirrors use metal with a dielectric coating to achieve uniformity of the reflected spectrum at multiple angles after the light is focused by the lens.

[0021] 2. The bracket, in conjunction with the aperture size and shape of the attached patch, blocks most of the stray light in the system.

[0022] 3. Through testing, it was found that when the plane mirror is installed at an angle of 37°-43° relative to the optical axis of the lens, the stray light is minimized and the effect is optimal. If the angle is too small, the serrated light-absorbing structure below will not be able to effectively absorb light. If the angle is too large, too little light will reach the image sensor, resulting in poor sensing performance.

[0023] 4. The reflection point of the light path on the sawtooth extinction structure needs to be as close as possible to the image sensor to reduce the generation of stray light. Therefore, the reflection point is best located at the end of the sawtooth extinction structure closest to the image sensor. Attached Figure Description

[0024] Figure 1 This is a three-dimensional exploded view of Example 1;

[0025] Figure 2 This is a cross-sectional view of Example 1;

[0026] Figure 3 This is a schematic diagram of the main structure of Example 1;

[0027] Figure 4 This is a schematic diagram of the light-shielding aperture in Example 1;

[0028] Figure 5 This is a schematic diagram of the light-shielding aperture in Example 2. Detailed Implementation

[0029] The following detailed description illustrates the specific implementation method:

[0030] The reference numerals in the accompanying drawings include: Module Holder 1, Serrated Extinction Structure 11, Aperture Fixing Base 12, Mirror Mount 13, Groove 14, Motor 2, Lens 3, Image Sensor 4, Filter 5, Light-Shielding Aperture 6, Bracket 61, Attachment Piece 62, and Plane Reflector 7.

[0031] Example 1

[0032] Example 1 is basically as follows Figures 1-4 As shown: A periscope camera module includes a motor 2 and a module holder 1 (base) connected to each other. A lens 3 is mounted on the motor 2. The foregoing is all prior art and will not be described in detail again. Figure 1 , Figure 2 , Figure 3 As shown, from left to right, an image sensor 4, a filter 5, a light-shielding aperture 6, and a plane mirror 7 are sequentially bonded between the motor 2 and the module Holder 1. The light-shielding aperture 6 includes a bracket 61 and an attachment piece 62. The attachment piece 62 is a light-shielding paper or a Soma sheet. In this embodiment, a Soma sheet is used. Figure 4As shown, the inner side of the Soma sheet has a rectangular hole; the filter 5 is an infrared cutoff filter; the plane mirror uses a metal with a dielectric coating, and the coating metal is silver or aluminum.

[0033] The Module Holder1 has a serrated light-absorbing structure 11, an aperture fixing seat 12, and a lens mount 13 integrally formed from left to right. The serrated light-absorbing structure 11 is made of PC material (polycarbonate). The lens mount 13 is set at an angle of 37°-43° relative to the optical axis of the lens 3. A groove 14 is formed between the aperture fixing seat 12 and the lens mount 13. The groove 14 provides limiting support for the bottom of the plane mirror 7. At the same time, it also ensures that the bottom of the light-blocking aperture 6 is higher than the plane mirror, so as to facilitate the replacement of the aperture size and shape of the attachment piece 62 of the light-blocking aperture 6 to effectively intercept stray light of the system.

[0034] The light-blocking aperture 6 is bonded to the aperture fixing base 12, and the plane mirror 7 is bonded to the mirror base 13, as follows. Figure 2 As shown, the light is represented by a dotted line. The light passes through the lens 3, the plane mirror 7 and the light-blocking aperture 6 in sequence, and is reflected at the end of the sawtooth light-extinguishing structure 11 near the image sensor 4, and is finally projected onto the image sensor 4. The image sensor 4 is used to convert the light signal into a digital signal.

[0035] Example 2

[0036] The difference between Example 2 and Example 1 is that, as Figure 5 As shown, the inner side of the Soma plate is serrated.

[0037] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A periscope camera module, characterized in that: It includes a lens, a plane mirror, a light-blocking aperture, and an image sensor. The plane mirror is tilted, and light passes through the lens, the plane mirror, and the light-blocking aperture in sequence before being projected onto the image sensor. The image sensor is used to convert the light signal into a digital signal.

2. A periscope camera module according to claim 1, characterized in that: The plane mirror is installed at an angle of 37°-43° relative to the optical axis of the lens.

3. A periscope camera module according to claim 1, characterized in that: A sawtooth-shaped light-extinguishing structure is provided between the image sensor and the light-shielding aperture. The light path is reflected sequentially at the end of the plane mirror and the sawtooth-shaped light-extinguishing structure near the image sensor, and then projected onto the image sensor.

4. A periscope camera module according to claim 1, characterized in that: The light-blocking aperture includes a support and an attachment plate, which is a light-blocking paper or a Soma sheet.

5. A periscope camera module according to claim 4, characterized in that: The inner side of the Soma tablet is serrated.

6. A periscope camera module according to claim 1, characterized in that: A filter is placed between the image sensor and the light-shielding aperture.

7. A periscope camera module according to claim 6, characterized in that: The filter is an infrared cutoff filter.

8. A periscope camera module according to claim 1, characterized in that: Plane mirrors use metal with a dielectric coating.

9. A periscope camera module according to claim 8, characterized in that: The coating metal is silver or aluminum.

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