An image slicing apparatus, an image system and an image method

Abstract

The application belongs to the field of optical elements and imaging technology, and discloses an image cutting device, an imaging system and an imaging method. The image cutting device comprises an image cutting device and a compensator arranged in sequence along an optical path. The image cutting device is used for cutting an incident circular image spot to obtain a linear image spot array formed by a plurality of linear image spots arranged in a one-dimensional direction. The compensator is used for compensating an optical path difference caused by the optical path structure of the image cutting device, so that the plurality of linear image spots converge on the same focal plane. The imaging scheme comprises converging and one-plane array imaging of a target light beam by using a front imaging unit to obtain a circular image spot; cutting and optical path difference compensation of the circular image spot by using the image cutting device to obtain a linear image spot array of a confocal surface; converging of the linear image spot array by using a converging assembly; and obtaining of image information by using a linear array detector. The application can realize high-speed, high-resolution and large-field imaging.

Description

Technical Field

[0001] This invention belongs to the field of optical elements and imaging technology, and more specifically, relates to an image segmentation device, imaging system and imaging method. Background Technology

[0002] In the field of modern imaging technology, area array imaging and linear array imaging are two mainstream methods, each playing an important role and widely used in numerous fields. Area array imaging technology, with its two-dimensional array structure, can acquire complete two-dimensional image information of a target in a single exposure, making it suitable for capturing a scene holistically and in one go, and able to intuitively present a large area of ​​image content. However, area array detectors also have significant limitations; their frame rate is often restricted, making it difficult to accurately capture detailed information in dynamic processes when facing rapidly changing scenes.

[0003] In contrast, the pixels of a linear array detector are arranged linearly along a one-dimensional direction, resembling a thin spectral "scanning band." Linear array imaging devices can achieve continuous scanning, acquiring high-precision image data over a large area. By using the relative motion between the detector and the target, image information of the target is acquired line by line, thus constructing a complete image. Due to its structural characteristics, its frame rate performance is outstanding. The acquisition speed of a typical linear array detector is extremely fast, reaching 5,000 to 60,000 lines per second. Users can choose to process images by combining several lines or tens of lines into a single frame, thereby achieving a very high frame rate. The frame rate of a linear array detector is usually more than two orders of magnitude higher than that of an area array detector. This high frame rate characteristic makes linear array detectors irreplaceable in some applications with extremely high time resolution requirements. However, since the imaging of a linear array detector depends on relative motion, the imaging system needs to have a precise and stable motion control mechanism, which increases the complexity and cost of the system. Moreover, during initial imaging, due to the limited field of view, it is difficult to quickly acquire general information about the overall target, requiring subsequent image stitching and other processing, which is a relatively cumbersome process.

[0004] Overcoming the shortcomings of both area array imaging and linear array imaging, and leveraging their respective advantages to simultaneously achieve a balance between imaging field of view, speed, and resolution, thereby improving the imaging frame rate of the imaging system, covering large field-of-view scenes, and clearly capturing the dynamic processes of high-speed moving objects, is a topic of concern and research for those skilled in the art. Summary of the Invention

[0005] This invention provides an image segmentation device, an imaging system, and an imaging method, thereby solving the problem that existing imaging schemes cannot simultaneously achieve the desired imaging field of view, speed, and resolution.

[0006] In a first aspect, the present invention provides an image segmentation device, comprising: an image segmenter and a compensator arranged sequentially along an optical path;

[0007] The image segmenter is used to segment the incident circular image spot to obtain a linear image spot array composed of multiple linear image spots arranged along a one-dimensional direction.

[0008] The compensator is used to compensate for the optical path difference caused by the optical path structure of the image splitter, so that multiple linear image spots converge on the same focal plane.

[0009] Preferably, the image segmenter includes a blade-shaped reflector and a plane reflector; the blade-shaped reflector is a plane reflector with a blade edge, the blade being used to segment image spots; the blade-shaped reflector and the plane reflector are arranged in parallel and form an optical reflection cavity; the compensator is a stepped compensator;

[0010] The knife-edge reflector is used to split the incident beam into a transmitted beam and a reflected beam;

[0011] The planar reflector is used to reflect the first reflected beam obtained after being cut by the knife-edge reflector back to the knife-edge reflector, and to emit the second reflected beam obtained after being cut by the knife-edge reflector from above or below the knife-edge reflector; wherein, the second reflected beam is the reflected beam obtained after being cut by the knife-edge reflector for the last time, and the first reflected beam is any other reflected beam besides the second reflected beam;

[0012] The stepped compensator is used to compensate for the optical path difference between the second transmitted beam and the second reflected beam. The beam after passing through the stepped compensator and the first transmitted beam together form the output beam. The first transmitted beam is the transmitted beam obtained by the first splitting by the knife-edge reflector, and the second transmitted beam is any other transmitted beam besides the first transmitted beam.

[0013] In a second aspect, the present invention provides an imaging system, comprising: a front imaging unit, an image segmentation device as provided in the first aspect of the present invention, a convergence component, and a linear array detector;

[0014] The front imaging unit is used to converge the target beam and perform a single area array imaging to obtain a circular image spot.

[0015] The image segmentation device is used to segment the circular image spot and compensate for the optical path difference to obtain a linear image spot array with a confocal surface;

[0016] The convergence component is used to converge the linear image spot array;

[0017] The linear array detector is used to obtain image information.

[0018] Preferably, the thickness of the optical reflection cavity formed by the blade mirror and the plane mirror in the image segmentation device is determined by the image spot diameter of the front imaging unit, the system F-number corresponding to the front imaging unit, the incident angle of the light beam to the blade mirror, and the number of segmented images.

[0019] Preferably, the blade angle of the blade reflector in the image slicing device is determined by the number of images to be sliced.

[0020] Preferably, the imaging system includes an image segmentation device and a convergence component, wherein the image segmentation device and the convergence component constitute a first-level image segmentation unit.

[0021] Preferably, the imaging system includes multiple image segmentation devices and multiple convergence components, with one image segmentation device and one convergence component constituting a primary image segmentation unit; multiple image segmentation units are arranged sequentially along the optical path to form a multi-level cascaded image segmentation unit.

[0022] Preferably, the front imaging unit is a telescope system, microscope system, camera, interferometer system, or spectrometer system.

[0023] Preferably, the converging component is refractive or reflective; wherein, the refractive converging component employs a single lens or a combination of achromatic lenses.

[0024] Thirdly, the present invention provides an imaging method, implemented using an imaging system as provided in the second aspect of the present invention, the imaging method comprising the following steps:

[0025] A circular image spot is obtained by converging the target beam and performing a single area array imaging using a front imaging unit.

[0026] The circular image spot is segmented and optical path difference is compensated using an image segmentation device to obtain a linear image spot array with a confocal surface;

[0027] The linear image spot array is converged using a convergence component;

[0028] Image information is obtained using a linear array detector.

[0029] One or more technical solutions provided in this invention have at least the following technical effects or advantages:

[0030] (1) The image segmentation device provided by the present invention includes an image segmenter and a compensator arranged sequentially along the optical path; the image segmenter is used to segment the incident circular image spot to obtain a linear image spot array composed of multiple linear image spots arranged in a one-dimensional direction; the compensator is used to compensate for the optical path difference caused by the optical path structure of the image segmenter, so that multiple linear image spots converge on the same focal plane. That is, in order to overcome the shortcomings of area array imaging and linear array imaging respectively and give full play to their advantages, the present invention adopts a technical route that combines area array imaging and linear array imaging. After one imaging, an image segmentation device is added to convert the area array into a linear array and then image it again on the detector image plane. Considering that traditional image segmentation devices, such as the most widely used Bowen-Walraven image segmenter (BW image segmenter), introduce problems such as image defocusing and blurred edge spots during the conversion from area array to linear array, this invention also compensates for the optical path difference caused by the image segmenter, which leads to defocusing of linear spots, by adding a compensator, thereby improving the imaging quality.

[0031] (2) Based on the image segmentation device provided by this invention, this invention provides an imaging system and a corresponding imaging method. The imaging scheme provided by this invention includes using a front imaging unit to converge the target beam and perform a single area array imaging to obtain a circular image spot; using an image segmentation device to segment the circular image spot and compensate for the optical path difference to obtain a linear image spot array with a confocal surface; using a convergence component to converge the linear image spot array; and using a linear array detector to obtain image information. That is, on the one hand, in view of the problem that area array imaging requires simultaneous exposure of the entire two-dimensional area array, resulting in a long exposure time and easy motion blur when shooting high-speed moving targets, and that traditional linear array imaging, although having a fast scanning speed, is limited by the relative motion control accuracy, thus limiting the overall imaging efficiency, this invention reduces the time cost of repeated exposure through a process of single area array imaging plus real-time conversion by an image segmentation device. The optical conversion response speed of the image segmenter device is much higher than that of mechanical motion control, which can quickly convert area array information into linear array output. Combined with the high-speed data acquisition capability of the linear array detector, the imaging frame rate of the imaging system is greatly improved, and the dynamic process of high-speed moving objects can be clearly captured. On the other hand, traditional linear array imaging, limited by the field of view of a single linear array, requires complex motion stitching to cover a large area of ​​targets, a cumbersome process prone to stitching errors. While area array imaging offers a larger field of view, it suffers from difficulty in maintaining sufficient resolution. This invention addresses this issue by acquiring large-area target information in a single area array imaging operation (i.e., initial area array imaging using a front-mounted imaging unit). The segmenter device preserves the original area array's field of view during the conversion process, achieving mode conversion solely through optical segmentation, without relying on mechanical motion to expand the field of view. Therefore, the imaging system can cover a large field of view while ensuring the clarity of local details through the linear array mode. In summary, this invention combines the advantages of both area array and linear array imaging, simultaneously achieving high-speed, high-resolution, and large-field-of-view imaging. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of an image slicing device provided in Embodiment 1 of the present invention;

[0033] Figure 2 A schematic diagram of the image plane obtained after image segmentation using the image segmentation device provided in Embodiment 1 of the present invention;

[0034] Figure 3 This is a schematic diagram of the framework of an imaging system provided in Embodiment 2 of the present invention;

[0035] Figure 4 This is a schematic diagram of an image segmentation device in an imaging system according to Embodiment 2 of the present invention, which converts a primary area array image into a linear array image through secondary imaging.

[0036] Among them, 1-knife-edge reflector, 2-plane reflector, 3-step compensator;

[0037] 100 - Front imaging unit, 200 - Image segmentation device, 300 - Convergence component, 400 - Linear array detector. Detailed Implementation

[0038] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0039] Example 1:

[0040] Example 1 provides an image segmentation device, comprising: an image segmenter and a compensator arranged sequentially along the optical path;

[0041] The image segmenter is used to segment the incident circular image spot to obtain a linear image spot array composed of multiple linear image spots arranged along a one-dimensional direction.

[0042] The compensator is used to compensate for the optical path difference caused by the optical path structure of the image splitter, so that multiple linear image spots converge on the same focal plane.

[0043] In this invention, the linear image spot obtained by the image segmenter is a segmented image that satisfies the detection image plane width of the linear array detector.

[0044] For details, see Figure 1 The image segmenter may include a blade-shaped reflector 1 and a plane reflector 2; the blade-shaped reflector 1 is a plane reflector with a blade edge, and the blade edge is used to segment the image spot; the blade-shaped reflector 1 and the plane reflector 2 are arranged in parallel and form an optical reflection cavity; the compensator may be a stepped compensator 3.

[0045] The incident light beam enters the optical reflection cavity, and the knife-edge reflector 1 is used to split the incident light beam into a transmitted beam and a reflected beam.

[0046] The plane mirror 2 is used to reflect the first reflected beam obtained after being cut by the knife-edge mirror 1 back to the knife-edge mirror 1, and to emit the second reflected beam obtained after being cut by the knife-edge mirror 1 from above or below the knife-edge mirror 1 (e.g., Figure 1 (The beam is emitted from above); wherein, the second reflected beam is the reflected beam obtained by the last cutting of the blade reflector 1, and the first reflected beam is any other reflected beam besides the second reflected beam.

[0047] The stepped compensator 3 is used to compensate for the optical path difference between the second transmitted beam and the second reflected beam. The beam after passing through the stepped compensator 3 and the first transmitted beam together form the outgoing beam. The first transmitted beam is the transmitted beam obtained by the first splitting by the knife-edge reflector 1, and the second transmitted beam is other transmitted beams besides the first transmitted beam.

[0048] That is, the knife-edge reflector 1 is a plane reflector with a sharp, burr-free edge that can cut the image spot. The upper or lower edge of the knife-edge reflector 1 should ensure that the second reflected beam can be emitted completely without being cut (e.g., Figure 1 The upper edge of the blade-shaped reflector 1 ensures that the second reflected beam can be emitted completely without being split.

[0049] Since the segmented image spots are generated by repeated incident of circular light spots onto the optical edge of the blade-shaped reflector 1, different image spots will have different optical path lengths when reaching the optical edge. This results in different imaging positions of different segmented images along the optical axis, leading to defocusing and blurring of the segmented image spots. The stepped compensator 3 is made of a light-transmitting optical material. It can compensate for the different optical path differences generated by the optical reflection cavity, thereby solving the problem of blurred segmented image spots.

[0050] Among them, see Figure 2 , The blade angle of the blade reflector 1 is such that, to ensure that the diameter of the light spot remains constant each time it reaches the optical blade during the slicing process, the blade angle of the blade reflector 1 needs to be determined based on the number of slicing images. Specifically, it can be calculated using the following formula: In the formula, n is the number of segmented images.

[0051] The incident beam's initial slicing position at the optical blade of the blade-shaped reflector 1 determines the final shape of the slicing image spot. Based on experimental comparisons, it was found that four slicing images result in better imaging. Therefore, the preferred slicing position is a four-part linear image spot with equal width. Figure 2 As shown. Furthermore, the number of reflections within the optical cavity and the number of steps in the stepped compensator 3 can be changed according to actual needs. The image segmentation device can also be designed to rotate along the optical axis or by adding additional rearrangement components to make the final image a vertical array.

[0052] The following example uses a four-part linear image spot, corresponding to a stepped compensator 3 with three stepped layers, as an example. Figure 1 Let's illustrate with examples.

[0053] See Figure 1The incident light beam enters the reflection cavity formed by the knife-edge reflector 1 and the plane reflector 2. The incident light beam is then split into two beams by the knife-edge of the knife-edge reflector 1, denoted as the transmitted beam t1 and the reflected beam r1, respectively. The reflected beam r1 is reflected by the plane reflector 2 and then reaches the knife-edge reflector 1 again, where it is split into two beams, denoted as the transmitted beam t2 and the reflected beam r2, respectively. The reflected beam r2 is reflected by the plane reflector 2 and then reaches the knife-edge reflector 1 again, where it is split into two beams, denoted as the transmitted beam t3 and the reflected beam r3, respectively. The reflected beam r3 is reflected by the plane reflector 2 and exits from above the knife-edge reflector 1. The transmitted beam t2, transmitted beam t3, and reflected beam r3 then enter the stepped compensator 3, passing sequentially through the bottom, middle, and top layers of the stepped compensator 3. After exiting, they combine with the transmitted beam t1 to form the split outgoing beam, completing the conversion from surface light to line light.

[0054] The image segmentation device provided in Example 1 not only enables the conversion of area array to linear array, but also improves the imaging quality by adding a compensator to compensate for the optical path difference caused by the image segmenter, which leads to defocusing of linear image spots.

[0055] Example 2:

[0056] Example 2 provides an imaging system, see [link to example]. Figure 3 and Figure 4 It includes: a front imaging unit 100, an image segmentation device 200 as described in Embodiment 1, a convergence component 300, and a linear array detector 400;

[0057] The front imaging unit 100 is used to converge the target beam and perform a single area array imaging to obtain a circular image spot.

[0058] The image segmentation device 200 is used to segment the circular image spot and compensate for the optical path difference to obtain a linear image spot array with a confocal surface;

[0059] The convergence component 300 is used to converge the linear image spot array;

[0060] The linear array detector 400 is used to obtain image information.

[0061] In the imaging system provided in Embodiment 2, the image segmentation device 200 is located between the front imaging unit 100 and the converging component 300, and the light beam enters the image segmentation device 200 from near the primary image plane of the front imaging unit 100 for image segmentation.

[0062] For details, see Figure 1 and Figure 3The thickness of the optical reflecting cavity formed by the knife-edge mirror 1 and the plane mirror 2 in the image segmentation device 200 is determined by the image spot diameter of the front imaging unit 100, the system F-number corresponding to the front imaging unit 100, and the incident angle of the light beam to the knife-edge mirror 1. The thickness d of the optical reflection cavity is determined by both the number of segments and the number of images. It can be calculated using the following formula: In the formula, D is the image spot diameter of the front imaging unit, and F is the system F-number corresponding to the front imaging unit. Let θ be the incident angle of the beam onto the knife-edge mirror, and n be the number of segments.

[0063] See Figure 2 The blade angle of the blade reflector 1 in the image slicing device 200 It is determined by the number of segments, n.

[0064] To reduce defocusing, the angle of incidence can be appropriately increased. At the same time, a smaller optical reflection cavity thickness should be selected as much as possible. However, increasing the incident angle will cause more object points to be segmented into different image segments, making object point duplication more severe. Taking all factors into consideration, the optimal setting is... At this point, the optical path length per unit image spot diameter is minimized, the image spot dispersion is minimized, and the system transmittance is maximized. Alternatively, the incident angle can be determined based on actual transmittance requirements. The value of .

[0065] In the application, the image segmentation device 200 is positioned on the optical axis of the incident beam. The focal plane of the incident beam is a circular image spot. The incident beam is incident on the image segmentation device 200 with a slow focal ratio. The image segmentation is determined according to the incident angle. The required focal ratio of the incident beam can be determined, and the incident focal ratio is preferably such that the ratio of the blur spot diameter to the image spot diameter is minimized. The front imaging unit 100 images near the optical slicing edge of the knife-edge mirror 1.

[0066] The imaging system may include an image segmentation device 200 and a convergence component 300, wherein the image segmentation device 200 and the convergence component 300 constitute a first-level image segmentation unit.

[0067] The imaging system may also include multiple image segmentation devices 200 and multiple convergence components 300. One image segmentation device 200 and one convergence component 300 constitute a primary image segmentation unit; multiple image segmentation units are arranged sequentially along the optical path to form a multi-level cascaded image segmentation unit.

[0068] For example, the imaging system includes two cascaded image segmentation units. The image segmentation device in the subsequent image segmentation unit is placed in front of the imaging image of the convergence component in the preceding image segmentation unit. The convergence component in the subsequent image segmentation unit is used to converge the second-level segmented image. Each stage of the image segmentation device only segments a small number of image spots. Through multi-stage cascading, defocusing is better compensated, while the number of segmented image spots can be increased and the width of the segmented image spots can be reduced, better meeting the requirement of a linear array detector to acquire full-field-of-view target image spots in one go.

[0069] The front imaging unit 100 is a front optical system such as a telescope system, microscope system, camera, interferometer system, or spectrometer system.

[0070] This invention is universally applicable to area array imaging, using a linear array detector to acquire area array images to achieve high frame rate acquisition. It can be used with any front-end system, such as a telescope, microscope, or interferometer, and can achieve stable, high temporal resolution acquisition.

[0071] The converging component 300 can be used to converge the output light of the image segmentation device 200 onto the detection image plane of the linear array detector 400. The converging component 300 can be refractive or reflective, and can employ a single lens or a combination of lenses. For example, a refractive converging component can employ a single lens or a combination of achromatic lenses. The optical parameters of the converging component 300 can be determined in conjunction with the image plane size of the linear array detector 400.

[0072] Figure 4 This is a schematic diagram illustrating how the image segmentation device 200 converts a single area array image into a linear array image through secondary imaging. In this diagram, a, b, c, and d represent different segmentation states of the target image. Figure 4 As can be seen from this, the primary imaging of the front imaging unit 100 has been changed from an area array to a linear array arrangement. In practical applications, the number of segmented images can be changed according to the actual linear array requirements.

[0073] Compared to existing partial area-to-linear array conversion technologies that rely on complex mechanical transmission mechanisms or multiple optical lens combinations, resulting in large system size and increased weight, making them unsuitable for applications such as satellites and drones where equipment size and weight are critical, the imaging system provided in Example 2 uses an image segmentation device as its core optical component. Through a simplified optical path design, redundant structures are reduced: the image segmentation device can employ an integrated prism or microlens array structure, eliminating the need for complex mechanical moving parts. After assembly and adjustment, it can be used stably at a low cost. Furthermore, by adopting a common reference design for assembly with the detector image plane, the system size is significantly reduced. Simultaneously, the simplified structure reduces assembly difficulty and failure rate, facilitating miniaturization and lightweight integration. Therefore, the imaging system provided in Example 2 also possesses the advantages of simple structure, ease of miniaturization, and low cost.

[0074] In summary, this invention provides an image segmentation scheme based on an image segmenter and a compensator, which converts area array imaging into linear array imaging through secondary imaging, thereby improving imaging quality in special application scenarios. Overall, this invention achieves breakthroughs in imaging rate, resolution, field of view, and structural compactness through innovative optical design and system optimization, providing a reliable technical solution for high-quality imaging requirements.

[0075] Corresponding to the imaging system provided in Example 2, the present invention also provides an imaging method, which will be described below with reference to Example 3.

[0076] Example 3:

[0077] Example 3 provides an imaging method implemented using the imaging system described in Example 2. The imaging method includes the following steps:

[0078] A circular image spot is obtained by converging the target beam and performing a single area array imaging using a front imaging unit.

[0079] The circular image spot is segmented and optical path difference is compensated using an image segmentation device to obtain a linear image spot array with a confocal surface;

[0080] The linear image spot array is converged using a convergence component;

[0081] Image information is obtained using a linear array detector.

[0082] Since the imaging method provided in Example 3 corresponds to the functions of each device in the imaging system provided in Example 2, Example 3 can be understood by referring to the description of Example 2, and will not be repeated here.

[0083] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An imaging system, characterized in that, include: Front imaging unit, multiple image segmentation devices, multiple convergence components and linear array detector; One image segmentation device and one convergence component constitute a primary image segmentation unit; multiple image segmentation units are arranged sequentially along the optical path to form a multi-level cascaded image segmentation unit; The front imaging unit is used to converge the target beam and perform a single-array imaging to obtain a circular image spot; the front imaging unit can be a telescope system, a microscope system, a camera, an interferometer system, or a spectrometer system. The multi-level cascaded image segmentation unit is used to obtain a converged linear image spot array and to meet the requirement that the linear array detector can acquire target image spots in the entire field of view at one time. The image segmentation device is used to segment the circular image spot and compensate for the optical path difference to obtain a linear image spot array with a confocal plane. The image segmentation device includes an image segmenter and a compensator arranged sequentially along the optical path. The image segmenter is used to segment the incident circular image spot to obtain a linear image spot array composed of multiple linear image spots arranged in a one-dimensional direction. The compensator is used to compensate for the optical path difference caused by the optical path structure of the image segmenter, so that the multiple linear image spots converge to the same focal plane. The converging component is used to converge the linear image spot array. The converging component is either refractive or reflective. The refractive converging component uses a single lens or a combination of achromatic lenses. The linear array detector is used to obtain image information.

2. The imaging system according to claim 1, characterized in that, The image segmenter includes a blade-shaped reflector and a plane reflector; the blade-shaped reflector is a plane reflector with a blade edge, which is used to segment image spots; the blade-shaped reflector and the plane reflector are arranged in parallel and form an optical reflection cavity; the compensator is a stepped compensator. The knife-edge reflector is used to split the incident beam into a transmitted beam and a reflected beam; The planar reflector is used to reflect the first reflected beam obtained after being cut by the knife-edge reflector back to the knife-edge reflector, and to emit the second reflected beam obtained after being cut by the knife-edge reflector from above or below the knife-edge reflector; wherein, the second reflected beam is the reflected beam obtained after being cut by the knife-edge reflector for the last time, and the first reflected beam is any other reflected beam besides the second reflected beam; The stepped compensator is used to compensate for the optical path difference between the second transmitted beam and the second reflected beam. The beam after passing through the stepped compensator and the first transmitted beam together form the outgoing beam. The first transmitted beam is the transmitted beam obtained by the first splitting by the knife-edge reflector, and the second transmitted beam is any other transmitted beam besides the first transmitted beam.

3. The imaging system according to claim 2, characterized in that, The thickness of the optical reflection cavity formed by the blade mirror and the plane mirror in the image segmentation device is determined by the image spot diameter of the front imaging unit, the system F number corresponding to the front imaging unit, the incident angle of the light beam to the blade mirror, and the number of segmented images.

4. The imaging system according to claim 2, characterized in that, The blade angle of the blade reflector in the image segmentation device is determined by the number of images to be segmented.

5. An imaging method, characterized in that, The imaging method, implemented using the imaging system as described in claim 1, includes the following steps: A circular image spot is obtained by converging the target beam and performing a single area array imaging using a front imaging unit. A convergent linear image spot array is obtained by using multi-level cascaded image segmentation units, which meets the requirement of linear array detectors to acquire target image spots of the entire field of view at one time; Specifically, the circular image spot is segmented and optical path difference is compensated using an image segmentation device to obtain a linear image spot array with a confocal surface; the linear image spot array is converged using a convergence component. Image information is obtained using a linear array detector.

Images