Imaging view field splicing structure module for large view field aerial camera

Abstract

The invention relates to an imaging view field splicing structure module for a large view field aerial camera, and belongs to the technical field of optical instruments. Comprising a single-lens imaging assembly, a dual-system imaging bracket (3) and a fixed seat assembly, the number of the single-lens imaging assemblies and the number of the fixing base assemblies are both two, and each single-lens imaging assembly is fixed to the dual-system imaging support (3) through one fixing base assembly. The angle formed by the two sets of single-lens imaging assemblies on the dual-system imaging support (3) is set to be 16.5 degrees + / -2 '. The field angle of the aerial camera imaging module is four times that of a camera with a single area array imaging chip, and the splicing precision can reach three pixels.

Description

Technical Field

[0001] The invention belongs to the technical field of optical instruments, and in particular relates to an imaging field of view splicing structure module for a large-field-of-view aerial camera. Background Art

[0002] With the development of aerial camera technology, the demand for cameras that can obtain high-resolution and large-format image information is increasing. Due to the limitation of imaging chip size, imaging field of view stitching technology is the key to solving the large field of view problem. At present, field of view stitching mainly includes mechanical stitching of imaging devices or the use of swing-scanning imaging method, but due to the complex structure, high process requirements, and more motion mechanisms, the reliability of the product is limited. In order to improve product reliability and expand the width of photos at the same time, optical splicing and lens imaging structure splicing are now mostly used to achieve the effect of expanding the camera's field of view and increasing the width of photos. The existing dual-lens splicing structure is relatively complicated to adjust, and requires multi-angle and multiple grinding of gaskets to correct the stitching accuracy. It is also easily affected by stress changes, resulting in excessive stitching accuracy and poor stability, making it difficult to meet the image's stitching accuracy requirements. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] The technical problem to be solved by the present invention is to provide an imaging field of view splicing structure module for a large field of view aerial camera to solve the problems of complex adjustment and poor stability of the existing dual-lens splicing structure.

[0005] (II) Technical solution

[0006] In order to solve the above technical problems, the present invention provides an imaging field of view splicing structure module for a large field of view aerial camera, comprising: a single-lens imaging component, a dual-system imaging bracket 3, and a fixing seat component;

[0007] The single-lens imaging assembly and the fixing seat assembly are provided with two groups, and each group of single-lens imaging assemblies is fixed on the dual-system imaging bracket 3 through a group of fixing seat assemblies;

[0008] The angle formed by the two groups of single-lens imaging components on the dual-system imaging bracket 3 is set to 16.5°±2′.

[0009] Each set of the fixing seat assembly includes: an outer connecting seat 1 5, a core shaft 6, a fixing seat 7, and an outer connecting seat 2 8;

[0010] The fixing seat 7 is provided with a core shaft 6, and the outer connecting seat 1 5 and the outer connecting seat 2 8 are respectively connected to the core shaft 6 and arranged on both sides of the fixing seat 7, and are arranged to rotate around the core shaft 6;

[0011] The first single-lens optical splicing structure 1 and the second single-lens optical splicing structure 2 are respectively mounted on two fixing seats 7;

[0012] By rotating the two fixing seats 7, the two single-lens imaging components, the external connecting seat 1 5 and the external connecting seat 2 8 are driven to rotate around the core shaft 6 to complete the splicing of the dual lenses in the vertical direction of the image;

[0013] The positions of the two lenses being spliced ​​in the horizontal direction are adjusted by adjusting the contact surfaces of the external connection seat 1 5 and the external connection seat 2 8 with the dual-system imaging bracket 3 .

[0014] Wherein, after the first single-lens optical splicing structure 1 and the second single-lens optical splicing structure 2 are adjusted in position, the external connecting seat 1 5 and the external connecting seat 2 8 are fixed to the dual-system imaging bracket 3 by fixing screws 4 respectively;

[0015] The external connecting seat 1 5 and the external connecting seat 2 8 are fastened to the fixing seat 7 by screws.

[0016] Wherein, the single-lens imaging assembly comprises: a first single-lens optical splicing structure 1, a second single-lens optical splicing structure 2;

[0017] The first single-lens optical splicing structure 1 and the second single-lens optical splicing structure 2 have the same structure, and the first single-lens optical splicing structure 1 is taken as an example for explanation;

[0018] The first single-lens optical splicing structure 1 includes: a first detector 11, a second detector 12, a reflector 13, and a lens 14;

[0019] The first detector 11 and the second detector 12 are arranged perpendicular to each other, and the reflector 3 is arranged at a fixed position on the optical axis;

[0020] The lens 4 adopts a coaxial transmission system, and the light path is split by the reflector 3 to two detectors. The focal plane components of the two detectors are arranged above and below the optical axis respectively.

[0021] Among them, through the splicing of the first single-lens optical splicing structure 1 and the second single-lens optical splicing structure 2 in the vertical direction of the image, the splicing accuracy reaches 3 pixels.

[0022] The first detector 11 and the second detector 12 use CMOS with a pixel size of 4.6 μm and an image plane pixel number of 8424×6032 as an imaging chip to achieve optical imaging with a single-lens field of view angle ≥35°.

[0023] Among them, through single-lens optical splicing and dual-lens structure splicing, the resolution of a single photo is 32K×6K, and a large field of view of ≥62° is achieved, and the imaging field of view is 4 times that of a single imaging chip.

[0024] (III) Beneficial effects

[0025] Compared with the prior art, the present invention has the following beneficial effects: The advantage of the present invention is that it abandons the traditional method of expanding the camera's field of view by mechanically splicing imaging devices or by swinging a servo platform, and instead uses a combination of single-lens optical splicing to expand the field of view and dual-lens structural splicing to expand the field of view to expand the field of view. The field of view of the imaging module of the aerial camera of the present invention is 4 times that of a camera with a single-chip array imaging chip, and the splicing accuracy can reach 3 pixels. The camera imaging module designed in this way has the advantages of simple structural design, simple assembly and adjustment, large field of view, high resolution, small overlap error, small size, high reliability, etc., which improves the system assembly and adjustment accuracy and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the single-lens optical splicing structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the splicing of the dual-lens structure of the present invention;

[0028] Figure 3 It is a schematic diagram of the structure of the fixing seat assembly of the present invention. DETAILED DESCRIPTION

[0029] In order to make the purpose, content, and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below in conjunction with the accompanying drawings and examples.

[0030] This embodiment provides an imaging field of view splicing structure module for a large field of view aerial camera, including: a single-lens imaging component, a dual-system imaging bracket 3, and a fixing seat component;

[0031] The single-lens imaging assembly and the fixing seat assembly are provided with two groups, and each group of single-lens imaging assemblies is fixed on the dual-system imaging bracket 3 through a group of fixing seat assemblies;

[0032] The angle formed by the two groups of single-lens imaging components on the dual-system imaging bracket 3 is set to 16.5°±2′.

[0033] Each set of the fixing seat assembly includes: an outer connecting seat 1 5, a core shaft 6, a fixing seat 7, and an outer connecting seat 2 8;

[0034] The fixing seat 7 is provided with a core shaft 6, and the outer connecting seat 1 5 and the outer connecting seat 2 8 are respectively connected to the core shaft 6 and arranged on both sides of the fixing seat 7, and are arranged to rotate around the core shaft 6;

[0035] The first single-lens optical splicing structure 1 and the second single-lens optical splicing structure 2 are respectively mounted on two fixing seats 7;

[0036] By rotating the two fixing seats 7, the two single-lens imaging components, the external connecting seat 1 5 and the external connecting seat 2 8 are driven to rotate around the core shaft 6 to complete the splicing of the dual lenses in the vertical direction of the image;

[0037] The positions of the two lenses being spliced ​​in the horizontal direction are adjusted by adjusting the contact surfaces of the external connection seat 1 5 and the external connection seat 2 8 with the dual-system imaging bracket 3 .

[0038] Wherein, after the first single-lens optical splicing structure 1 and the second single-lens optical splicing structure 2 are adjusted in position, the external connecting seat 1 5 and the external connecting seat 2 8 are fixed to the dual-system imaging bracket 3 by fixing screws 4 respectively;

[0039] The external connecting seat 1 5 and the external connecting seat 2 8 are fastened to the fixing seat 7 by screws.

[0040] Wherein, the single-lens imaging assembly comprises: a first single-lens optical splicing structure 1, a second single-lens optical splicing structure 2;

[0041] The first single-lens optical splicing structure 1 and the second single-lens optical splicing structure 2 have the same structure, and the first single-lens optical splicing structure 1 is taken as an example for explanation;

[0042] The first single-lens optical splicing structure 1 includes: a first detector 11, a second detector 12, a reflector 13, and a lens 14;

[0043] The first detector 11 and the second detector 12 are arranged perpendicular to each other, and the reflector 3 is arranged at a fixed position on the optical axis;

[0044] The lens 4 adopts a coaxial transmission system, and the light path is split by the reflector 3 to two detectors. The focal plane components of the two detectors are arranged above and below the optical axis respectively.

[0045] Among them, through the splicing of the first single-lens optical splicing structure 1 and the second single-lens optical splicing structure 2 in the vertical direction of the image, the splicing accuracy reaches 3 pixels.

[0046] The first detector 11 and the second detector 12 use CMOS with a pixel size of 4.6 μm and an image plane pixel number of 8424×6032 as an imaging chip to achieve optical imaging with a single-lens field of view angle ≥35°.

[0047] Among them, through single-lens optical splicing and dual-lens structure splicing, the resolution of a single photo is 32K×6K, and a large field of view of ≥62° is achieved, and the imaging field of view is 4 times that of a single imaging chip.

[0048] Dual-lens splicing structure Figure 2 , Figure 3As shown, two single-lens imaging components with the same performance are fixed at an angle of 16.5°±2′ for structural installation.

[0049] Example 1

[0050] The structural installation method of this embodiment is as follows: a core shaft 6 is installed on both sides of the fixed seat 7, and the outer connecting seat 1 5 and the outer connecting seat 2 8 are respectively connected to the core shaft 6 and can rotate around the core shaft 6. After the outer connecting seat 1 5 and the outer connecting seat 2 8 are adjusted to their positions, they are fastened to the fixed seat 7 with screws, and combined processing is performed based on the reference plane "A" to ensure that the angle between the plane "B" and the reference plane "A" is 16.5°±2′;

[0051] When performing dual-lens stitching, first install the two lenses on the dual-system imaging bracket 3 through the fixing seat 7, the external connecting seat 1 5 and the external connecting seat 2 8, and adjust the horizontal stitching position by grinding the contact surface between the external connecting seat 1 5 and the external connecting seat 2 8 and the dual-system imaging bracket 3. After adjustment, fix the external connecting seat 1 5 and the external connecting seat 2 8 to the dual-system imaging bracket 3 with the fixing screw 4; loosen the screws on the external connecting seat 1 5 and the external connecting seat 2 8, so that the fixing seat 7 drives the lens and the core shaft 6 to rotate around the external connecting seat 1 5 and the external connecting seat 2 8. During the rotation process, the stitching dislocation in the vertical direction of the image can be reduced, and the stitching of the dual lenses in the vertical direction of the image can be achieved, and the stitching accuracy can reach 3 pixels. Through this dual-lens stitching structure, the difficulty of dual-lens stitching is reduced, and the stability of image stitching and the alignment accuracy of image stitching are increased.

[0052] Through single-lens optical splicing and dual-lens structural splicing design, the imaging splicing module has a single photo resolution of 32K×6K, which can achieve a large field of view of ≥62°, and the imaging field of view is 4 times that of a single imaging chip.

[0053] Through this dual-lens stitching structure, the difficulty of dual-lens stitching is reduced, and the stability of image stitching and the alignment accuracy of image stitching are increased.

[0054] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An imaging field of view splicing structure module for a large field of view aerial camera, characterized in that: include: Single-lens imaging assembly, dual-system imaging bracket (3), and fixing seat assembly; The single-lens imaging assembly and the fixing seat assembly are each provided with two groups, and each group of the single-lens imaging assembly is fixed on the dual-system imaging bracket (3) via a group of fixing seat assemblies; The angle formed by the two groups of single-lens imaging components on the dual-system imaging bracket (3) is set to 16.5°±2′.

2. The imaging field of view splicing structure module for a large field of view aerial camera according to claim 1, characterized in that: Each set of the fixing seat assembly comprises: an outer connecting seat 1 (5), a core shaft (6), a fixing seat (7), and an outer connecting seat 2 (8); The fixing seat (7) is provided with a core shaft (6), and the outer connecting seat 1 (5) and the outer connecting seat 2 (8) are respectively connected to the core shaft (6) and arranged on both sides of the fixing seat (7), and are arranged to rotate around the core shaft (6); The first single-lens optical splicing structure (1) and the second single-lens optical splicing structure (2) are respectively mounted on two fixing seats (7); By rotating the two fixing seats (7), the two single-lens imaging components, the first external connection seat (5) and the second external connection seat (8) are driven to rotate around the core shaft (6), thereby completing the splicing of the two lenses in the vertical direction of the image; The positions of the two lenses spliced ​​in the horizontal direction are adjusted by adjusting the contact surfaces of the external connection seat 1 (5) and the external connection seat 2 (8) with the dual-system imaging bracket (3).

3. The imaging field of view splicing structure module for a large field of view aerial camera according to claim 1, characterized in that: After the positions of the first single-lens optical splicing structure (1) and the second single-lens optical splicing structure (2) are adjusted, the external connection seat 1 (5), the external connection seat 2 (8) and the dual-system imaging bracket (3) are fixed respectively by fixing screws (4); The external connection seat 1 (5) and the external connection seat 2 (8) are fastened to the fixing seat (7) by means of screws.

4. The imaging field of view splicing structure module for a large field of view aerial camera according to claim 1, characterized in that: The single-lens imaging assembly comprises: a first single-lens optical splicing structure (1) and a second single-lens optical splicing structure (2); The first single-lens optical splicing structure (1) and the second single-lens optical splicing structure (2) have the same structure, and the first single-lens optical splicing structure (1) is taken as an example for description; The first single-lens optical splicing structure (1) comprises: a first detector (11), a second detector (12), a reflector (13), and a lens (14); The first detector (11) and the second detector (12) are arranged perpendicular to each other, and the reflector (3) is arranged at a fixed position on the optical axis; The lens (4) adopts a coaxial transmission system, and the light path is split by the reflector (3) to two detectors, and the focal plane components of the two detectors are arranged above and below the optical axis respectively.

5. The imaging field of view splicing structure module for a large field of view aerial camera according to claim 1, characterized in that: By splicing the first single-lens optical splicing structure (1) and the second single-lens optical splicing structure (2) in the vertical direction of the image, the splicing accuracy reaches 3 pixels.

6. The imaging field of view splicing structure module for a large field of view aerial camera according to claim 3, characterized in that: The first detector (11) and the second detector (12) use a CMOS with a pixel size of 4.6 μm and an image plane pixel number of 8424×6032 as an imaging chip, realizing optical imaging with a single-lens field of view angle of ≥35°.

7. The imaging field of view splicing structure module for a large field of view aerial camera according to claim 1, characterized in that: Through single-lens optical stitching and dual-lens structure stitching, the resolution of a single photo is 32K×6K, and a large field of view of ≥62° is achieved, which is 4 times the field of view of a single imaging chip.

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