Bionic space imaging system and method based on spatial light modulator and off-axis three-mirror structure and spacecraft

Abstract

The application discloses a bionic space imaging system and method based on a spatial light modulator and an off-axis three-mirror structure and a spacecraft, the system combines the wide field of view and the achromatic advantage of the off-axis three-mirror optical subsystem with the high precision and the fast wavefront correction capability of the spatial light modulator, specifically, the application utilizes the off-axis three-mirror optical subsystem to maintain a basic resolution in the full field of view for continuous monitoring, then the image detection and processing subsystem identifies the field of view angle coordinates of the target position, then the wavefront sensing and control subsystem finds the multi-channel voltage data corresponding to the field of view angle coordinates of the target position, the spatial light modulator is adjusted through the multi-channel voltage data, the accurate field of view angle of the target is realized, the optical aberration is corrected in real time, the imaging quality of the local area is rapidly improved to be close to the diffraction limit, and high resolution is achieved.

Description

Technical Field

[0001] This invention relates to the field of space optical remote sensing technology, and more specifically to an advanced optical system and method for satellites or spacecraft with wide field of view and high-resolution imaging capabilities. Background Technology

[0002] High-resolution Earth observation is the core task of space optical remote sensing. Traditional space camera design faces a fundamental contradiction: to achieve high ground resolution, long focal lengths and large apertures are required; however, to cover a wide observation range (wide field of view), the optical system becomes extremely complex, large, and heavy, which directly conflicts with the strict limitations imposed by satellite platforms on payload weight and volume.

[0003] Foveated imaging technology stems from the physiological characteristics of the human visual system: the fovea region of the retina possesses extremely high visual resolution, while the resolution drops sharply in the peripheral areas. In fields such as ultra-high-definition displays, virtual reality (VR), and augmented reality (AR), traditional globally uniform high-resolution imaging faces bottlenecks in terms of massive data throughput and computational load. Foveated imaging, through eye tracking, provides high-resolution images only in the area of ​​gaze, reducing resolution in the peripheral field of vision, thereby significantly reducing system power consumption and computational requirements while maintaining subjective visual quality.

[0004] Currently, spatial light modulators (SLMs, such as LCOS liquid crystal panels) have become core components for realizing dynamic foveal imaging. SLMs can modulate the amplitude or phase of light waves in real time, enabling dynamic rendering and aberration correction in high-resolution areas. For example, Wang et al. (Frontiers of Optoelectronics, 2017) designed a foveal imaging system based on a reflective SLM, correcting aberrations in the region of interest (ROI) using the SLM. Related patents (such as Apple's 2022 patent and Meta's 2024 patent) also widely employ LCOS panels combined with polarization optics or switchable waveplates, along with microelectromechanical systems (MEMS) mirrors, to achieve gaze-tracking in high-resolution areas. Furthermore, several holographic near-eye display patents utilize eye-tracking to drive mirrors to change the beam angle incident on the SLM, thereby expanding the pupil box and achieving gaze-point rendering.

[0005] However, existing concave imaging systems still have limitations in terms of optical relay and projection architecture. Traditional refractive lens groups are prone to introducing chromatic aberration and are bulky; holographic optical elements (HOEs) suffer from low diffraction efficiency and stray light problems; while coaxial multi-reflector systems suffer from central obstruction, resulting in light energy loss and reduced imaging contrast, making it difficult to meet the requirements of the concave region for ultimate image quality.

[0006] Off-axis three-mirror systems (ATM) offer an ideal solution to the aforementioned optical relay bottlenecks. Through a non-coaxial optical path design, the TMA system completely eliminates central obstruction, significantly improving light energy utilization and imaging contrast. Its pure reflective properties naturally provide broad-spectrum achromatic correction capabilities. Combined with freeform surface technology, it can achieve excellent aberration correction with a large field of view and high resolution within a compact folded optical path.

[0007] In summary, by combining the dynamic local modulation capability of spatial light modulators with the high contrast, unobstructed view, wide spectrum, and compact folding advantages of off-axis three-mirror systems, a spatial light modulation concave imaging architecture based on off-axis three-mirror systems can be constructed. This effectively overcomes the aberrations and obstruction defects of existing refractive / diffraction relay optical paths. This scheme provides a novel technical path for realizing next-generation high-performance imaging systems with large field of view, high contrast, and low computational load. It can also meet the requirements of lightweight and miniaturization in space environments while maintaining wide field-of-view search and high-resolution detailed investigation capabilities. Summary of the Invention

[0008] To overcome the shortcomings of existing technologies, this invention provides a biomimetic space imaging system based on a spatial light modulator and an off-axis three-mirror structure, which can balance wide field-of-view search and high-resolution detailed investigation capabilities.

[0009] This invention provides a biomimetic space imaging system based on a spatial light modulator and an off-axis three-mirror structure, comprising: An off-axis three-mirror optical subsystem is used to continuously image light signals from the field of view across the entire field of view. The image detection and processing subsystem is used to receive continuous imaging across the entire field of view to form a wide-area image, perform target detection on the wide-area image to identify the field of view coordinates of the target position, and also to receive aberration-corrected light signals and generate a target image, and then fuse the wide-area image and the target image for storage or download. The wavefront sensing and control subsystem is connected to the image processing subsystem via wires. It is used to retrieve the corresponding multi-channel voltage data from a pre-stored calibration library based on the field-of-view coordinates of the obtained target position. A spatial light modulator, integrated within the off-axis three-mirror optical subsystem, is connected to the wavefront sensing and control subsystem via wires. It is used to adjust the surface shape based on received multi-channel voltage data to facilitate aberration correction. Preferably, the spatial light modulator is a deformable mirror.

[0010] The biomimetic space imaging system based on a spatial light modulator and an off-axis three-mirror structure provided by this invention has the following beneficial effects: (1) Intelligent resource allocation: mimicking the human eye, it prioritizes the allocation of limited data bandwidth and data processing capabilities to the most concerned areas, resulting in extremely high efficiency.

[0011] (2) The system is simple and reliable: it adopts a single spatial light modulator combined with a fixed three-mirror structure, which is lighter, smaller and more stable than multi-mirror zoom or complex correction systems.

[0012] (3) Wideband operating capability: The total internal reflection optical design enables it to operate with high quality across the entire visible light spectrum and even a wider spectrum.

[0013] (4) Significantly improve effective resolution: Through local aberration correction, the imaging quality of degraded areas such as the edge field of view can be improved to the level of the center field of view, and the overall effective observation capability is greatly enhanced.

[0014] (5) Reduce total data volume: It is not necessary to transmit the entire highest resolution image at all times. Only local high resolution images are marked and transmitted in the low resolution image of the entire field of view, which effectively saves valuable satellite-to-ground data transmission bandwidth.

[0015] Furthermore, the off-axis three-reflector optical subsystem includes a primary mirror, a secondary mirror, and a third mirror arranged sequentially along the optical path direction. The primary mirror and the third mirror are located on the same side of the secondary mirror, and the third mirror is located below the primary mirror. The primary mirror and the third mirror have conical surfaces, and the secondary mirror has a spherical surface.

[0016] The off-axis three-reflector optical subsystem provided by this invention adopts a total internal reflection design, perfectly eliminates chromatic aberration, adapts to wide-band operation, and has a simple structure.

[0017] Furthermore, the spatial light modulator is located at the position of the secondary mirror, replacing the secondary mirror or the exit pupil position.

[0018] The present invention places the spatial light modulator at the position of the secondary mirror. Since the secondary mirror has a small aperture and is the position where the light beam converges, placing the spatial light modulator at the position of the secondary mirror can accommodate a spatial light modulator of a suitable size, which is cost-effective. Moreover, the position of the converged light beam can be used to more efficiently control aberrations.

[0019] Furthermore, the wavefront sensing and control subsystem is used to pre-calibrate the aberration distribution at different viewing angles on the ground using a pre-compensation method, and calculate the correction voltage of the spatial light modulator at different viewing angles based on the aberration distribution, thereby forming the correction library.

[0020] The wavefront sensing and control subsystem provided by this invention serves as the "intelligent central hub" of the system. It employs a model-based pre-compensation method: the aberration distribution of the optical system at different field-of-view angles is precisely calibrated on the ground beforehand, and the corresponding spatial light modulator correction voltage is calculated and stored in a mapping table on the spaceborne computer. During operation, the corresponding voltage is simply invoked based on the target field-of-view angle, eliminating the need for complex on-orbit wavefront measurements and calculations, thus significantly improving response speed and reliability.

[0021] Furthermore, the spatial light modulator is used to restore the surface shape to the reference surface shape after transmitting the target image to the image processing subsystem, thereby restoring the continuous imaging of the off-axis three-mirror optical subsystem.

[0022] Furthermore, the spatial light modulator is used to transmit the target image to the image processing subsystem, receive multi-channel voltage data of the next target location, adjust the shape again, and image the next target location.

[0023] Furthermore, the off-axis three-mirror optical subsystem is used to provide basic imaging with a first resolution across the entire field of view, and the spatial light modulator is used to achieve a second resolution imaging of the target position that is higher than the first resolution after receiving multi-channel voltage data and completing surface shape adjustment.

[0024] Furthermore, the first resolution is the diffraction-limited resolution under the condition of no dynamic aberration correction, and the second resolution is close to or reaches the diffraction-limited resolution of the biomimetic space imaging system based on the spatial light modulator and off-axis three-mirror structure at the target position.

[0025] Furthermore, the image detection and processing subsystem is used to perform target detection on the wide-area image, identify multiple potential target points, select the highest priority target according to preset rules, and obtain the field-of-view coordinates of the target position by identifying the field-of-view coordinates of the position of the highest priority target.

[0026] On the other hand, the present invention also provides a biomimetic spatial imaging method based on a spatial light modulator and an off-axis three-mirror structure, wherein the biomimetic spatial imaging system based on the aforementioned spatial light modulator and off-axis three-mirror structure is used for imaging, including: (1) Wide-field search: The off-axis three-reflection mirror optical subsystem is used to perform continuous imaging of the entire field of view; (2) Target locking: The image detection and processing subsystem receives continuous imaging to form a wide-area image, and performs target detection on the wide-area image to identify the field of view coordinates of the target position; (3) Aberration correction: Based on the field angle coordinates of the target position, the wavefront sensing and control subsystem retrieves the corresponding multi-channel voltage data from the pre-stored correction library, and adjusts the shape of the received multi-channel voltage data through the spatial light modulator in order to correct aberrations. (4) High-resolution imaging: The image detection and processing subsystem receives the aberration-corrected optical signal and generates the target image. The wide-area image and the target image are fused and stored or downloaded.

[0027] On the other hand, the present invention also provides a spacecraft characterized by carrying the aforementioned biomimetic space imaging system based on a space light modulator and an off-axis three-mirror structure. The spacecraft provided by the present invention can significantly improve the intelligence and efficiency of its on-orbit observation.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows: The core of the system provided by this invention combines the wide field of view and chromatic aberration-free advantages of the off-axis three-mirror optical subsystem with the high precision and rapid wavefront correction capability of the spatial light modulator. Specifically, this invention utilizes the off-axis three-mirror optical subsystem to maintain a basic resolution across the entire field of view for continuous monitoring. Then, the image detection and processing subsystem identifies the field-of-view coordinates of the target position. Next, the wavefront sensing and control subsystem obtains the multi-channel voltage data corresponding to the field-of-view coordinates of the target position. By controlling the spatial light modulator with the multi-channel voltage data, the optical aberrations of the target can be corrected in real time for the precise field of view. This rapidly improves the imaging quality of the local area to near the diffraction limit, achieving high resolution, thus enabling both wide field-of-view search and high-resolution detailed investigation capabilities. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 The control logic diagram of the biomimetic space imaging system based on a spatial light modulator and an off-axis three-mirror structure provided by the present invention; Figure 2 This is a schematic diagram of the optical structure layout of the space imaging system in an embodiment of the present invention, wherein M1: primary mirror, M2: secondary mirror, M3: third reflecting mirror, M4: oscillating mirror, M5: two-way beam splitter, M6: infrared camera, and M7: visible light camera. Figure 3This is an optical simulation diagram of the space imaging system in an embodiment of the present invention, wherein M1: primary mirror, M2: secondary mirror, and M3: third reflecting mirror; Figure 4 This is a comparison of the modulation transfer function curves of the system before and after spatial light modulator correction at different field of view in an embodiment of the present invention. Figure 5 This is a flowchart of the imaging method described in this invention. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the scope of protection of the present invention.

[0033] like Figure 1 As shown in the figure, a control logic diagram of a biomimetic space imaging system based on a spatial light modulator and an off-axis three-mirror structure is provided in a specific embodiment of the present invention. The system includes an off-axis three-mirror optical subsystem, an image detection and processing subsystem, a wavefront sensing and control subsystem, and a spatial light modulator.

[0034] The off-axis three-reflector optical subsystem provided in the specific embodiments of the present invention is used to continuously image light signals from the field of view across the entire field of view.

[0035] The image detection and processing subsystem provided in the specific embodiments of the present invention is used to receive continuous imaging across the entire field of view to form a wide-area image, perform target detection on the wide-area image to identify the field of view coordinates of the target position, receive aberration-corrected light signals and generate a target image, and store or download the wide-area image and the target image after fusion.

[0036] In a specific embodiment of the present invention, the wavefront sensing and control subsystem and the image processing subsystem are connected by wires, and are used to retrieve the corresponding multi-channel voltage data from a pre-stored calibration library based on the field-of-view coordinates of the obtained target position.

[0037] The spatial light modulator provided in a specific embodiment of the present invention is integrated within the off-axis three-mirror optical subsystem and connected to the wavefront sensing and control subsystem via wires. It is used to adjust the face shape based on the received multi-channel voltage data in order to correct aberrations.

[0038] Example 1 like Figure 2 As shown, the biomimetic space imaging system based on a spatial light modulator and an off-axis three-mirror structure provided in this embodiment includes an off-axis three-mirror optical subsystem, an image detection and processing subsystem, a wavefront sensing and control subsystem, and a spatial light modulator.

[0039] The off-axis three-reflector optical subsystem provided in this embodiment consists of a primary mirror M1, a secondary mirror M2, and a third mirror M3. The aperture stop is located at the primary mirror M1. M1 and M3 are high-axis conic surfaces, and M2 is a conic surface. The system focal length is 3800mm, the relative aperture is F / 10, and the full field of view is 16°×2.5°. M4 is a tilting mirror used for scanning and expanding the imaging field of view. M5 is a two-way beam splitter used for transmitting and reflecting visible light and infrared light respectively. M6 is an infrared camera used for receiving imaging information in the infrared band. M7 is a visible light camera used for receiving imaging information in the visible light band.

[0040] The spatial light modulator provided by this invention is integrated and placed at the position of the secondary mirror M2. The spatial light modulator provided in this embodiment adopts a 294-channel piezoelectric driven deformable mirror.

[0041] like Figure 3 As shown, the off-axis three-reflector optical subsystem provided by this invention includes a primary mirror M1, a secondary mirror M2, and a third mirror M3, arranged sequentially along the optical path. Target light rays first enter the primary mirror M1, are reflected by it, and converge to the secondary mirror M2. The spatial light modulator is integrated and placed at the position of the secondary mirror M2, replacing the secondary mirror itself; the light rays undergo spatial light modulation simultaneously with reflection by the secondary mirror M2. Subsequently, the light rays reflected by the secondary mirror M2 continue to enter the third mirror M3, are reflected again by the third mirror M3, and are imaged onto the detector, achieving spatial imaging of the target scene. The primary mirror M1 and the third mirror M3 are located on the same side of the secondary mirror M2, forming an off-axis three-reflection optical path structure.

[0042] The biomimetic space imaging system based on a spatial light modulator and an off-axis three-mirror structure provided in this embodiment, operating at an orbital altitude of 260 kilometers, provides a full-field-of-view ground coverage width of approximately 73 kilometers. In the non-dynamic correction mode, the full-field-of-view ground resolution is designed to be 40 meters (corresponding to a spatial frequency of 6 lp / mm). In the dynamic aberration correction mode, the single-field-of-view resolution is 5.5 meters. Figure 4 As shown in (a), the solid curves show the MTF of multiple field angles under this condition, all of which are greater than 0.1 at 50 lp / mm, meeting the basic imaging requirements.

[0043] The wavefront sensing and control subsystem provided in this embodiment has a pre-stored correction library for different field-of-view angles. The image detection and processing subsystem provided in this embodiment performs real-time analysis of the full field-of-view image. When a target location is detected at the edge of the field of view (e.g., 7°, 0°), the wavefront sensing and control subsystem provided in this embodiment immediately calls up a preset voltage combination for the (7°, 0°) field-of-view angle and applies it to the spatial light modulator. The mirror wavefront of the spatial light modulator provided in this embodiment undergoes micron-level deformation, thereby compensating for the inherent off-axis aberration at that field-of-view angle. Figure 4 As shown in (b), after correction, the wavefront error at this location rapidly decreased from nearly 2 wavelengths to less than 0.25 wavelengths.

[0044] After correction, the image detection and processing subsystem provided in this embodiment images the local area, such as... Figure 4 As shown by the dashed curve in (c), after correction, the MTF of this field of view is improved to 0.1 at 50 lp / mm (corresponding to a ground resolution of 5.5 meters), and the imaging quality is close to the diffraction limit, achieving a leap in resolution from 40 meters to 5.5 meters. The image detection and processing subsystem provided in this embodiment transmits this local high-resolution image along with the target coordinate information.

[0045] A specific embodiment of the present invention also provides a biomimetic spatial imaging method based on a spatial light modulator and an off-axis three-mirror structure, wherein the biomimetic spatial imaging system based on the aforementioned spatial light modulator and off-axis three-mirror structure is used for imaging, including: (1) Wide-field search: The off-axis three-reflection mirror optical subsystem is used to perform continuous imaging of the entire field of view.

[0046] (2) Target locking: The image detection and processing subsystem receives continuous imaging to form a wide-area image, and performs target detection on the wide-area image to identify the field of view coordinates of the target position.

[0047] (3) Aberration correction: Based on the field angle coordinates of the target position, the wavefront sensing and control subsystem retrieves the corresponding multi-channel voltage data from the pre-stored correction library, and adjusts the shape of the received multi-channel voltage data through the spatial light modulator in order to correct aberrations.

[0048] (4) High-resolution imaging: The image detection and processing subsystem receives the aberration-corrected optical signal and generates the target image. The wide-area image and the target image are fused and stored or downloaded.

[0049] Example 2 This embodiment provides a biomimetic space imaging method based on a spatial light modulator and an off-axis three-mirror structure, such as Figure 5 As shown, it includes: S101, Wide-area search: Controls the spatial light modulator to maintain the reference plane shape, and the system continuously images the entire 16°×2.5° strip area with a basic resolution of 40 meters.

[0050] S102, Target Locking: The airborne image processing algorithm automatically detects targets in the acquired wide-area image, identifies multiple potential points of interest, and selects the highest priority target according to preset rules (such as target type and motion state) to obtain its precise field of view coordinates.

[0051] S103, Aberration Correction: Based on the target field-of-view coordinates, retrieve the corresponding multi-channel voltage data from the pre-stored correction library to drive the spatial light modulator to complete surface shape adjustment within milliseconds.

[0052] S104, High-resolution imaging: Exposes the calibrated area to obtain a high-resolution image with a resolution of 5.5 meters, and then stores or downloads it after fusing it with a low-resolution background image. After completion, the system can resume wide-area search mode or move on to the next target.

[0053] Those skilled in the art will understand that the parameters (such as focal length, field of view, and resolution) in the above specific embodiments are merely examples and can be adjusted according to actual task requirements. There are also various alternatives for the number of channels, placement, and control strategy (pre-stored model or real-time sensing) of the spatial light modulator, and all these variations fall within the protection scope defined by the claims of this invention.

[0054] The above embodiments are used to explain and illustrate the present invention, but not to limit the present invention. Any modifications and changes made to the present invention within the spirit and scope of the claims shall fall within the protection scope of the present invention.

[0055] On the other hand, the present invention also provides a spacecraft equipped with the aforementioned biomimetic space imaging system based on a space light modulator and an off-axis three-mirror structure.

Claims

1. A biomimetic space imaging system based on a spatial light modulator and an off-axis three-mirror structure, characterized in that, include: An off-axis three-mirror optical subsystem is used for continuous imaging across the entire field of view based on light signals from the field of view; The image detection and processing subsystem is used to receive continuous imaging across the entire field of view to form a wide-area image, perform target detection on the wide-area image to identify the field of view coordinates of the target position, and also to receive aberration-corrected light signals and generate a target image, and then fuse the wide-area image and the target image for storage or download. The wavefront sensing and control subsystem is connected to the image processing subsystem via wires. It is used to retrieve the corresponding multi-channel voltage data from a pre-stored calibration library based on the field-of-view coordinates of the obtained target position. A spatial light modulator, integrated within the off-axis three-mirror optical subsystem, is connected to the wavefront sensing and control subsystem via wires. It is used to adjust the face shape based on received multi-channel voltage data to facilitate aberration correction.

2. The biomimetic space imaging system based on a spatial light modulator and an off-axis three-mirror structure according to claim 1, characterized in that, The off-axis three-reflector optical subsystem includes a primary mirror, a secondary mirror, and a third mirror arranged sequentially along the optical path. The primary mirror and the third mirror are located on the same side of the secondary mirror, and the third mirror is located below the primary mirror. The primary mirror and the third mirror have conical surfaces, and the secondary mirror has a spherical surface.

3. The biomimetic space imaging system based on a spatial light modulator and an off-axis three-mirror structure according to claim 2, characterized in that, The spatial light modulator is located at the position of the secondary mirror, and is used to achieve spatial light modulation while completing the reflection of the secondary mirror, or it is located at the exit pupil position.

4. The biomimetic space imaging system based on a spatial light modulator and an off-axis three-mirror structure according to claim 1, characterized in that, The wavefront sensing and control subsystem is used to pre-calibrate the aberration distribution at different viewing angles on the ground using a pre-compensation method, and calculate the correction voltage of the spatial light modulator at different viewing angles based on the aberration distribution, thereby forming the correction library.

5. The biomimetic space imaging system based on a spatial light modulator and an off-axis three-mirror structure according to claim 1, characterized in that, The spatial light modulator is used to restore the surface shape to the reference surface shape after transmitting the target image to the image processing subsystem, thereby restoring the continuous imaging of the off-axis three-mirror optical subsystem.

6. The biomimetic space imaging system based on a spatial light modulator and an off-axis three-mirror structure according to claim 1, characterized in that, The spatial light modulator is used to transmit the target image to the image processing subsystem, receive multi-channel voltage data of the next target location, adjust the shape again, and image the next target location.

7. The biomimetic space imaging system based on a spatial light modulator and an off-axis three-mirror structure according to claim 1, characterized in that, The off-axis three-mirror optical subsystem is used to provide basic imaging with a first resolution across the entire field of view, and the spatial light modulator is used to achieve a second resolution imaging of the target position with a resolution higher than the first resolution after receiving multi-channel voltage data and completing surface shape adjustment.

8. The biomimetic space imaging system based on a spatial light modulator and an off-axis three-mirror structure according to claim 7, characterized in that, The first resolution is the diffraction-limited resolution under the condition of no dynamic aberration correction, and the second resolution is close to or reaches the diffraction-limited resolution of the biomimetic space imaging system based on the spatial light modulator and off-axis three-mirror structure at the target position.

9. A biomimetic spatial imaging method based on a spatial light modulator and an off-axis three-mirror structure, characterized in that, Imaging is performed using the aforementioned biomimetic space imaging system based on a spatial light modulator and an off-axis three-mirror structure, including: (1) Wide-field search: The off-axis three-reflection mirror optical subsystem is used to perform continuous imaging of the entire field of view; (2) Target locking: The image detection and processing subsystem receives continuous imaging to form a wide-area image, and performs target detection on the wide-area image to identify the field of view coordinates of the target position; (3) Aberration correction: Based on the field angle coordinates of the target position, the wavefront sensing and control subsystem retrieves the corresponding multi-channel voltage data from the pre-stored correction library, and adjusts the shape of the received multi-channel voltage data through the spatial light modulator in order to correct aberrations. (4) High-resolution imaging: The image detection and processing subsystem receives the aberration-corrected optical signal and generates the target image. The wide-area image and the target image are fused and stored or downloaded.

10. A spacecraft, characterized in that, A biomimetic space imaging system based on a spatial light modulator and an off-axis three-mirror structure as described in any one of claims 1-8.

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