An imaging field-of-view splicing structure module for a large field-of-view aerial camera

Abstract

This invention relates to an imaging field-of-view stitching structure module for a large field-of-view aerial camera, belonging to the field of optical instrument technology. It includes: a single-lens imaging component, a dual-system imaging bracket (3), and a mounting bracket assembly; both the single-lens imaging component and the mounting bracket assembly are provided in two sets, with each set of single-lens imaging components fixed to the dual-system imaging bracket (3) via a mounting bracket assembly; the angle formed by the two sets of single-lens imaging components on the dual-system imaging bracket (3) is set to 16.5°±2′. The field-of-view angle of this aerial camera imaging module is 4 times that of a camera with a single-chip array imaging chip, and the stitching accuracy can reach 3 pixels.

Description

Technical Field

[0001] This invention belongs to the field of optical instrument technology, specifically relating to an imaging field-of-view stitching structure module for a large field-of-view aerial camera. Background Technology

[0002] With the development of aerial camera technology, the demand for cameras that acquire high-resolution, large-format images is increasing. Due to the limitations of imaging chip size, imaging field-of-view stitching technology is key to solving the problem of a large field of view. Currently, field-of-view stitching mainly involves mechanical stitching of imaging devices or the use of swing-scan imaging methods. However, due to the complexity of the structure, high process requirements, and numerous moving mechanisms, the reliability of the products is limited. To improve product reliability and expand the image width, optical stitching and lens imaging structure stitching methods are now widely used to expand the camera's field of view and increase the image width. Existing dual-lens stitching structures are relatively complex to adjust, requiring multiple angles and repeated grinding of shims to correct stitching accuracy. They are also susceptible to stress changes, causing stitching accuracy to exceed tolerances and resulting in poor stability, making it difficult to meet the image's requirements for stitching accuracy. Summary of the Invention

[0003] (a) Technical problems to be solved

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

[0005] (II) Technical Solution

[0006] To solve the above-mentioned technical problems, the present invention provides an imaging field-of-view stitching 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 base component;

[0007] The single-lens imaging component and the mounting bracket are both provided in two sets. Each set of single-lens imaging components is fixed to the dual-system imaging bracket 3 by a set of mounting brackets.

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

[0009] Each set of the fixed base assembly includes: an outer connecting base 5, a spindle 6, a fixed base 7, and an outer connecting base 8;

[0010] The fixed base 7 is provided with a spindle 6, and the outer connecting base 5 and the outer connecting base 8 are respectively connected to the spindle 6 on both sides of the fixed base 7 and are configured to be able to rotate around the spindle 6.

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

[0012] By rotating the two fixed seats 7, the two single-lens imaging components, the first external connecting seat 5 and the second external connecting seat 8 are driven to rotate around the spindle 6, thus completing the stitching of the two lenses in the vertical direction of the image.

[0013] The horizontal splicing position of the two lenses is adjusted by adjusting the contact surfaces of the external connector 1 5 and external connector 2 8 with the dual-system imaging bracket 3.

[0014] In this process, after the first single-lens optical splicing structure 1 and the second single-lens optical splicing structure 2 are positioned, the external connecting seat 1 5, the external connecting seat 2 8 and the dual-system imaging bracket 3 are fixed by fixing screws 4 respectively.

[0015] The external connector 5 and the external connector 8 are fastened to the fixed seat 7 with screws.

[0016] The single-lens imaging component includes: a first single-lens optical stitching structure 1 and a second single-lens optical stitching structure 2.

[0017] The first single-lens optical splicing structure 1 and the second single-lens optical splicing structure 2 have the same structure. The first single-lens optical splicing structure 1 is used 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 perpendicularly 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. The light path is split into two detectors by the reflector 3. The focal plane components of the two detectors are respectively arranged above and below the optical axis.

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

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

[0023] Among them, by using single-lens optical stitching and dual-lens structure stitching, the resolution of a single photo is 32K×6K, achieving a large field of view of ≥62° imaging, which is 4 times the field of view of a single imaging chip.

[0024] (III) Beneficial Effects

[0025] Compared with existing technologies, this invention has the following advantages: It abandons the traditional methods of mechanically stitching imaging devices or using servo platform swinging to expand the camera's field of view. Instead, it employs a combination of single-lens optical stitching and dual-lens structural stitching to expand the field of view. The aerial camera imaging module of this invention has a field of view four times that of a camera with a single-chip area array imaging chip, and the stitching accuracy can reach 3 pixels. The camera imaging module designed in this way has advantages such as simple structural design, simple assembly and adjustment, large field of view, high resolution, small overlap error, small size, and high reliability, thus improving the system's assembly and adjustment accuracy and reliability. Attached Figure Description

[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 dual-lens structure splicing of the present invention;

[0028] Figure 3 This is a schematic diagram of the fixing base assembly of the present invention. Detailed Implementation

[0029] To make the objectives, contents, and advantages of the present invention clearer, the specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples.

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

[0031] The single-lens imaging component and the mounting bracket are both provided in two sets. Each set of single-lens imaging components is fixed to the dual-system imaging bracket 3 by a set of mounting brackets.

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

[0033] Each set of the fixed base assembly includes: an outer connecting base 5, a spindle 6, a fixed base 7, and an outer connecting base 8;

[0034] The fixed base 7 is provided with a spindle 6, and the outer connecting base 5 and the outer connecting base 8 are respectively connected to the spindle 6 on both sides of the fixed base 7 and are configured to be able to rotate around the spindle 6.

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

[0036] By rotating the two fixed seats 7, the two single-lens imaging components, the first external connecting seat 5 and the second external connecting seat 8 are driven to rotate around the spindle 6, thus completing the stitching of the two lenses in the vertical direction of the image.

[0037] The horizontal splicing position of the two lenses is adjusted by adjusting the contact surfaces of the external connector 1 5 and external connector 2 8 with the dual-system imaging bracket 3.

[0038] In this process, after the first single-lens optical splicing structure 1 and the second single-lens optical splicing structure 2 are positioned, the external connecting seat 1 5, the external connecting seat 2 8 and the dual-system imaging bracket 3 are fixed by fixing screws 4 respectively.

[0039] The external connector 5 and the external connector 8 are fastened to the fixed seat 7 with screws.

[0040] The single-lens imaging component includes: a first single-lens optical stitching structure 1 and a second single-lens optical stitching structure 2.

[0041] The first single-lens optical splicing structure 1 and the second single-lens optical splicing structure 2 have the same structure. The first single-lens optical splicing structure 1 is used 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 perpendicularly 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. The light path is split into two detectors by the reflector 3. The focal plane components of the two detectors are respectively arranged above and below the optical axis.

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

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

[0047] Among them, by using single-lens optical stitching and dual-lens structure stitching, the resolution of a single photo is 32K×6K, achieving a large field of view of ≥62° imaging, which is 4 times the field of view of a single imaging chip.

[0048] Dual-lens stitching structure, such as Figure 2 , Figure 3As shown, the structure is installed by fixing two single-lens imaging components with identical performance at an angle of 16.5°±2′.

[0049] Example 1

[0050] The installation method of this embodiment is as follows: A spindle 6 is installed on each side of the fixed base 7. The outer connecting seat 1 5 and the outer connecting seat 2 8 are connected to the spindle 6 and can rotate around the spindle 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 base 7 with screws. The assembly is carried out with the reference plane "A" as the reference to ensure that the angle between the plane "B" and the reference plane "A" is 16.5°±2′.

[0051] When performing dual-lens stitching, the two lenses are first mounted on the dual-system imaging bracket 3 via the mounting base 7, external connecting base 5, and external connecting base 8. The horizontal stitching position is adjusted by grinding the contact surfaces of external connecting bases 5 and 8 with the dual-system imaging bracket 3. After adjustment, external connecting bases 5 and 8 are fixed to the dual-system imaging bracket 3 with fixing screws 4. The screws on external connecting bases 5 and 8 are then loosened, allowing the mounting base 7 to rotate the lens and spindle 6 around external connecting bases 5 and 8. During rotation, vertical stitching misalignment is reduced, achieving vertical stitching of the two lenses with a stitching accuracy of up to 3 pixels. This dual-lens stitching structure reduces the difficulty of dual-lens stitching and increases the stability and alignment accuracy of image stitching.

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

[0053] This dual-lens stitching structure reduces the difficulty of dual-lens stitching and increases the stability and alignment accuracy of image stitching.

[0054] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An imaging field-of-view stitching structure module for a large field-of-view aerial camera, characterized in that, include: Single-lens imaging assembly, dual-system imaging bracket (3), and mounting base assembly; The single-lens imaging component and the mounting bracket are both provided in two sets. Each set of single-lens imaging components is fixed on the dual-system imaging bracket (3) by a set of mounting brackets. The angle formed by the two sets of single-lens imaging components on the dual-system imaging bracket (3) is set to 16.5°±2′; Each set of fixed base assemblies includes: external connecting base one (5), spindle (6), fixed base (7), and external connecting base two (8); The fixed seat (7) is provided with a spindle (6), and the outer connecting seat one (5) and the outer connecting seat two (8) are respectively connected to the spindle (6) on both sides of the fixed seat (7) and are configured to rotate around the spindle (6); The two sets of single-lens imaging components are respectively referred to as the first single-lens optical stitching structure (1) and the second single-lens optical stitching structure (2); The first single-lens optical splicing structure (1) and the second single-lens optical splicing structure (2) are respectively mounted on two fixed bases (7); By rotating the two fixed seats (7), the two single-lens imaging components, the first external connecting seat (5) and the second external connecting seat (8) are driven to rotate around the spindle (6), thus completing the splicing of the two lenses in the vertical direction of the image. The horizontal splicing position of the two lenses is adjusted by adjusting the contact surfaces of the external connector one (5) and the external connector two (8) with the dual-system imaging bracket (3); After the first single-lens optical splicing structure (1) and the second single-lens optical splicing structure (2) are adjusted to their positions, the external connecting seat one (5) and the external connecting seat two (8) are fixed to the dual-system imaging bracket (3) by fixing screws (4); The external connecting seat 1 (5) and external connecting seat 2 (8) are fastened to the fixing seat (7) with screws; The first single-lens optical splicing structure (1) and the second single-lens optical splicing structure (2) have the same structure. The first single-lens optical splicing structure (1) is used as an example for explanation. The first single-lens optical splicing structure (1) includes: 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 perpendicularly to each other, and the reflector (13) is arranged at a fixed position on the optical axis; The lens (14) adopts a coaxial transmission system. The light path is split into two detectors through a reflector (13). The focal plane components of the two detectors are respectively arranged above and below the optical axis.

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

3. The imaging field-of-view stitching structure module for a large field-of-view aerial camera as described in claim 2, characterized in that, The first detector (11) and the second detector (12) use CMOS with a pixel size of 4.6μm and an image plane pixel number of 8424×6032 as imaging chips to achieve optical imaging with a single lens field of view ≥35°.

4. The imaging field-of-view stitching structure module for a large field-of-view aerial camera as described in claim 3, characterized in that, By combining single-lens optical stitching and dual-lens structural stitching, a single image can achieve a resolution of 32K×6K, enabling imaging with a large field of view of ≥62°, which is 4 times the field of view of a single imaging chip.

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