Multi-view-field optical device
By combining the reflective Caseglin telescope and refractive telescope optical path in the optical guide device, the optical path is divided by biased spectroscopy, and the coexistence of large and small visual field systems is achieved, which solves the problem of the inability to work simultaneously in the prior art. Problem, improving the target detection accuracy and function.
Patent Information
- Application Number
- CN202421090434.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-17
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-05-17
AI Technical Summary
The prior art cannot realize that optical systems with large and small fields of view work simultaneously, and cannot coexist in one optical device and do not interfere with each other.
A multi-field optical guide device is designed, including the main mirror, the secondary mirror, the adjustment mirror group and the biased spectrometer. Combined with the reflective Caseglin telescope and the refractive telescope optical path, the biased spectrometer will be used to The optical path is divided into different bands and is used for large and small field of view detectors respectively to achieve the simultaneous operation of both.
It realizes the coexistence of large and small field of view systems, and can perform target scanning and fine tracking at the same time, improves target detection accuracy, and has the function of image synthesis aperture.
Smart Images
Figure CN222280944U_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of optical detection, and in particular relates to an optical device with multiple fields of view. Background Art
[0002] Conventional flight guidance devices are installed on the head of the aircraft. They are used to measure the target's image size, azimuth and other motion parameters and generate guidance information, ultimately guiding the aircraft to the designated target. The seeker receives the energy radiated or reflected by the target, measures the relative position information of the guided weapon flying toward the target and forms guidance instructions. The performance of the seeker plays a decisive role in the realization of flight guidance.
[0003] Through searching, it was found that China's authorized invention patent 201911098004.7, an optical system with a scanning function, reveals the use of inserting or removing a reflector in the optical path to change the transmission path of the optical path, thereby realizing the switching between the refracting telescope and the reflecting telescope, thereby realizing the switching between the scanning system with a large field of view angle and the jamming system with a small field of view angle.
[0004] Further search revealed that China's authorized patent 202210463986.0, a common-aperture multi-field-of-view optical system, reveals the use of the unobstructed edge of the main reflector of the jammer system to achieve a large-field-of-view short-focus system and the use of an obstructed jammer main optical path to achieve a small-field-of-view telephoto system, and the telephoto and short-angle systems are alternately switched and inserted into the optical path to achieve switching between the two systems.
[0005] It can be seen that although the above two solutions realize the switching between large and small fields of view, they fail to realize the coexistence of the system with a large field of view and the system with a small field of view, and the system with a large field of view and the system with a small field of view cannot work at the same time.
[0006] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention
[0007] The object of the present invention is to provide a multi-field-of-view optical guiding device, thereby overcoming the above-mentioned defects in the prior art.
[0008] To achieve the above object, the present invention provides a multi-field optical device, characterized in that:
[0009] It comprises: a main reflector having an arc-shaped reflective surface for receiving and converging light reflected by an observation target, and a through hole is provided at the bottom of the main reflector;
[0010] A secondary reflector is arranged in the convergent outgoing light path of the primary reflector, and the outgoing light path of the secondary reflector passes through the through hole of the primary reflector;
[0011] An adjustment lens group is arranged outside the convergence focus of the secondary reflector and is used to reduce the divergence angle of the outgoing light of the secondary reflector;
[0012] An offset beam splitter, at least one offset beam splitter is disposed in the output light path of the adjustment lens group, and is used to transmit a light beam in a first preset wavelength band and reflect a light beam in a second preset wavelength band;
[0013] The at least two detectors are a first detector and a second detector, which correspond to light beams of a first preset wavelength band and a second preset wavelength band respectively. The field of view of the first detector and the second detector are different.
[0014] Preferably, in the above technical solution, one offset beam splitter is offsetly arranged on one side of the main axis of the output light of the adjustment lens group, or two offset beam splitters are symmetrically arranged in the main axis of the output light of the adjustment lens group.
[0015] Preferably, in the above technical solution, when a biased beam splitter is set, the detectors include two detectors, including a first detector corresponding to a first preset wavelength band light beam and a second detector corresponding to a second preset wavelength band light beam, wherein the fields of view of the first detector and the second detector are inconsistent.
[0016] Preferably, in the above technical solution, when two biased beam splitters are provided and the beam splitting bands are the same: the detectors are three, including one first detector corresponding to the first preset band light beam and two second detectors corresponding to the second preset band light beams, wherein the fields of view of the two second detectors are consistent, and the fields of view of the first detector and the second detector are inconsistent;
[0017] When two biased beam splitters are provided and the beam splitting bands are different: the beam splitter-1 is transmitted for the first preset band light beam and is reflected for the second band light beam. The beam splitter-2 is transmitted for the first preset band light beam and is reflected for the third band light beam. The detectors are three, including a first detector corresponding to the first preset band light beam, a second detector corresponding to the second preset band light beam and a third detector corresponding to the third preset band light beam, wherein the fields of view of the first detector, the second detector and the third detector are inconsistent.
[0018] Preferably, in the above technical solution, the reflection surface of one offset beam splitter corresponds to the light beam in the second detector band, and the transmission surface corresponds to the light beam in the first detector band.
[0019] Preferably, in the above technical solution, two offset beam splitters form a rhombus-shaped reflecting surface, the reflecting surfaces are perpendicular to each other, the vertices of the rhombus-shaped reflecting surface are arranged on the main optical axis, the rhombus-shaped reflecting surface reflects the light beam in the band corresponding to the second detector, and the rhombus-shaped reflecting surface transmits the light beam in the band where the first detector is located.
[0020] Preferably, in the above technical solution, the field of view angle α of the first detector is smaller than the field of view angle β of the second detector.
[0021] Preferably, in the above technical solution, the first detector is mainly composed of detector-1 and a lens group, and the primary reflector and secondary reflector, the reflector group, the biased beam splitter, the lens group, and the detector-1 constitute the optical path of the reflective Cassegrain telescope in the order of the optical path.
[0022] Preferably, in the above technical solution, the field angle α of the detector-1 formed by the reflective Cassegrain telescope optical path is 0.5°-1.5°.
[0023] Preferably, in the above technical solution, the second detector is mainly composed of detector-2 and a refracting lens group, and the reflecting surface between the outer side of the primary reflector and the secondary reflector edge, the reflector group, the biased beam splitter, the refracting lens group, and detector-2 constitute the refracting telescope optical path in the order of the optical path.
[0024] Preferably, in the above technical solution, the field angle β of the refracting telescope optical path is 3.5°-15°.
[0025] Preferably, in the above technical solution, the light spot corresponding to the effective incident light of the second detector optical system is located in the middle position between the edge of the primary reflector and the edge of the secondary reflector, and the light spot corresponding to the effective incident light of the first detector optical system is located in the middle position between the edge of the primary reflector and the edge of the secondary reflector.
[0026] Preferably, in the above technical solution, a reflector group is further arranged between the adjustment mirror group and the bias beam splitter, the reflector group is composed of a fixed reflector and a reflective prism, the fixed reflector is arranged at 45° with respect to the main optical axis, is fixedly connected with the adjustment mirror group and the main reflector and the secondary reflector, and can be driven to rotate around a swing axis by a swing motor. The swing axis coincides with the optical axis of the main optical axis after being reflected by the fixed reflector.
[0027] In order to make the telescope system described in the present invention easier to understand, the working principles and characteristics of the Cassegrain telescope system and refracting telescope system used in the present invention are explained as follows based on common sense of optical professionals:
[0028] Cassegrain Telescope System:
[0029] Cassegrain telescope: A reflecting telescope composed of two mirrors, invented by Cassegrain in 1672. The larger of the two mirrors is called the primary mirror, and the smaller one is called the secondary mirror. Usually, a hole is opened in the center of the primary mirror, and the image is formed behind the primary mirror. The traditional "Cassegrain telescope" has a parabolic primary mirror and a hyperbolic secondary mirror that reflects light and passes through the hole in the center of the primary mirror. The folded optical design makes the length of the tube compact, but this sacrifices the breadth of the field of view, and the field of view is narrow.
[0030] Refracting telescope system: It is composed of a convex lens. The distant target is converged by the convex lens using the refracted light from the lens, and then magnified by the eyepiece. This optical design makes the tube length long, but has a wider field of view.
[0031] Structural differences: The tube of a refracting telescope is relatively long because light needs to be refracted through lenses and tubes to converge to a point, called the "focal plane." The tube of a reflecting telescope is usually shorter because light is reflected directly to the focus.
[0032] Image quality difference: The image quality of a refracting telescope is affected by the quality of the glass and the processing technology, while the image quality of a reflecting telescope is affected by the shape and quality of the reflecting surface. Since the primary mirror of a reflecting telescope is a convex mirror, the star points of its image are usually more obvious than those of a refracting telescope.
[0033] Portability: Reflecting telescopes are usually easier to carry than refracting telescopes because they are relatively simple in structure and do not require a long, thin tube like a refracting telescope.
[0034] Difference in usable field of view: The size of the field of view is determined by the imaging characteristics of the objective lens. Under the same optical quality and magnification, the usable field of view of a reflecting telescope is smaller, and it is related to the focal ratio (1 / f) of the objective lens. The usable field of view of a refracting telescope is larger.
[0035] Compared with the prior art, the present invention has the following beneficial effects:
[0036] The technical solution provided by the present disclosure realizes the coexistence of a large field of view detection system and a small field of view detection system. The large field of view detection system and the small field of view detection system can work simultaneously without interfering with each other and without switching.
[0037] The large detection range of the large field of view optical system can be used to realize the target scanning function, and the fine detection of the small field of view optical system can be used to realize the target tracking function.
[0038] The two second detectors in Implementation Option 2 work simultaneously and in parallel, so that the technical solution has precise visual positioning and ranging functions similar to those of human eyes.
[0039] The two second detectors work in parallel at the same time, so that the technical solution also has the function of image synthetic aperture, which can greatly improve the target detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0040] Figure 1 This is a schematic diagram of the optical path structure of a biased beam splitter;
[0041] Figure 2 Schematic diagram of the optical path structure of two offset beam splitters;
[0042] Figure 3 and Figure 4 This is a schematic diagram of the optical path structure of a reflecting Cassegrain telescope;
[0043] Figure 5 and Figure 6 This is a schematic diagram of the optical path of a refracting telescope;
[0044] Figure 7.1 , Figure 7.2 and Figure 7.3 Schematic diagram of the positional relationship between the incident light spot of the detector and the primary reflector;
[0045] Figure 8 It is a schematic diagram of the optical path structure of a biased beam splitter and a reflector group;
[0046] Fig. 9 It is a schematic diagram of the optical path structure of the combination of two biased beam splitters and a reflector group;
[0047] Fig.10 It is a schematic diagram of the optical path structure of two identical biased beam splitters and a reflector group;
[0048] Fig.11 Schematic diagram of the optical path structure of two identical biased beam splitters and a reflector group.
[0049] In the figure: 1. primary reflector; 2. secondary reflector; 3. adjustment mirror group; 4. second detector; 5. first detector; 6. biased beam splitter; 7. primary optical axis; 8. secondary optical axis; 9. lens group; 10. refracting mirror group; 11. reflector group; 12. reflecting prism; 13. swing motor; 14. swing axis; 15. fixed reflector; 16. third detector. DETAILED DESCRIPTION
[0050] The specific embodiments of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.
[0051] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components. Example 1
[0052] A multi-viewing field optical guiding device, comprising: a primary reflector, a secondary reflector, an adjusting mirror group, a biased beam splitter, and two detectors working in different wavebands and having different view field sizes, namely a small view field detector and a large view field detector;
[0053] A main reflector, having an arc-shaped reflective surface, for receiving and focusing light reflected by an observation target, and a through hole is provided at the bottom of the main reflector;
[0054] A secondary reflector is arranged in the convergent outgoing light path of the primary reflector, and the outgoing light path of the secondary reflector passes through the through hole of the primary reflector;
[0055] A reflector assembly, arranged at the rear side of the through hole of the primary reflector, for receiving the emitted light of the secondary reflector;
[0056] The biased beam splitter is arranged on one side of the main optical axis of the outgoing light of the reflector group, and has the function of reflecting the light beam of the waveband corresponding to the large field of view detector and transmitting the light beam of the waveband where the small field of view detector is located;
[0057] The small field detector is arranged on the side through which the biased beam splitter transmits, and its optical axis -1 coincides with the main optical axis of the telescope system composed of the primary reflector and the secondary reflector. The large field detector is arranged on the side through which the biased beam splitter reflects, and its optical axis -2 is parallel to the secondary optical axis formed after the main optical axis is reflected by the biased beam splitter, and is arranged outside the secondary optical axis.
[0058] The light spot corresponding to the effective incident light of the large field of view detector is located in the middle of the edge of the primary reflector and the edge of the secondary reflector, and the light spot corresponding to the effective incident light of the small field of view detector is located in the middle of the edge of the primary reflector and the edge of the secondary reflector. The aperture of the light spot corresponding to the effective incident light of the large field of view optical system is smaller than the aperture of the primary reflector;
[0059] A detector with a large field of view, which is composed of a detector 2, a refractive lens group, the offset beam splitter, and a reflective surface between the outer side of the secondary reflector and the inner side of the primary reflector to form a refractive telescope optical path, and has a field of view angle of 3.5°-15°;
[0060] The detector with a small field of view is composed of the detector 1, the lens group, the biased beam splitter, the secondary reflector and the primary reflector to form a reflective Cassegrain telescope optical path, and the field of view angle is 0.5-1.5°. Example 2
[0061] An optical guidance device with multiple fields of view, comprising: a primary reflector, a secondary reflector, an adjustment mirror group, a biased beam splitter, two large field of view detectors with the same field of view working in the same band, and a small field of view detector working in a different band;
[0062] Two offset beam splitters form a rhombus-shaped reflection surface, the reflection surfaces are perpendicular to each other, the apex of the rhombus-shaped reflection surface is arranged on the main optical axis, the rhombus-shaped reflection surface reflects the light beam of the wavelength band corresponding to the second detector, and the rhombus-shaped reflection surface transmits the light beam of the wavelength band where the first detector is located;
[0063] The small field detector is arranged on the side through which the biased beam splitter passes, and its optical axis -1 coincides with the main optical axis of the telescope system composed of the primary reflector and the secondary reflector. The large field detectors are arranged on both sides of the biased beam splitter, and their optical axis -2 is parallel to the secondary optical axis formed after the main optical axis is reflected by the biased beam splitter, and is arranged outside the secondary optical axis; the light spots corresponding to the effective incident light of the two large field optical systems are located outside the secondary reflector, in the middle of the edge of the primary reflector and the edge of the secondary reflector, and the aperture of the light spot corresponding to the effective incident light of the large field optical system is smaller than the aperture of the primary reflector;
[0064] A detector with a large field of view, which is composed of a detector 2, a refractive lens group, the offset beam splitter, and a reflective surface between the outer side of the secondary reflector and the inner side of the primary reflector to form a refractive telescope optical path, and has a field of view angle of 3.5°-15°;
[0065] The detector with a small field of view is composed of the detector 1, the lens group, the biased beam splitter, the secondary reflector and the primary reflector to form a reflective Cassegrain telescope optical path, and the field of view angle is 0.5-1.5°. Example 3
[0066] An optical guidance device with multiple fields of view, comprising: a primary reflector, a secondary reflector, a reflector group, a biased beam splitter, and two detectors working in different wavebands and having different field sizes, namely a small field of view detector and a large field of view detector;
[0067] A main reflector, having an arc-shaped reflective surface, for receiving and focusing light reflected by an observation target, and a through hole is provided at the bottom of the main reflector;
[0068] A secondary reflector is arranged in the convergent outgoing light path of the primary reflector, and the outgoing light path of the secondary reflector passes through the through hole of the primary reflector;
[0069] The reflector group is arranged at the rear side of the through hole of the main reflector, and is used to receive the output light of the secondary reflector; the reflector group is composed of a fixed reflector and a reflecting prism, the fixed reflector is arranged at 45 degrees with the main optical axis, is fixedly connected with the adjustment mirror group and the main reflector and the secondary reflector, and can be driven to rotate around the swing axis by the swing motor. The swing axis coincides with the optical axis of the main optical axis after being reflected by the fixed reflector.
[0070] The biased beam splitter is arranged on one side of the main optical axis of the outgoing light of the reflector group, and has the function of reflecting the light beam of the waveband corresponding to the large field of view detector and transmitting the light beam of the waveband where the small field of view detector is located;
[0071] The small field detector is arranged on the side through which the biased beam splitter transmits, and its optical axis -1 coincides with the main optical axis of the telescope system composed of the primary reflector and the secondary reflector. The large field detector is arranged on the side through which the biased beam splitter reflects, and its optical axis -2 is parallel to the secondary optical axis formed after the main optical axis is reflected by the biased beam splitter, and is arranged outside the secondary optical axis.
[0072] The entrance pupil of the large field of view optical system is located in the middle of the edge of the primary reflector and the edge of the secondary reflector, and the diameter of the entrance pupil of the large field of view optical system is smaller than the diameter of the primary reflector;
[0073] A detector with a large field of view, which is composed of a detector 2, a refractive lens group, the offset beam splitter, and a reflective surface between the outer side of the secondary reflector and the inner side of the primary reflector to form a refractive telescope optical path, and has a field of view angle of 3.5°-15°;
[0074] The detector with a small field of view is composed of the detector 1, the lens group, the biased beam splitter, the secondary reflector and the primary reflector to form a reflective Cassegrain telescope optical path, and the field of view angle is 0.5-1.5°. Example 4
[0075] An optical guidance device with multiple fields of view, comprising: a primary reflector, a secondary reflector, a reflector group, a biased beam splitter, two large field of view detectors with the same field of view working in the same band, and a small field of view detector working in different bands and with different fields of view;
[0076] The biased beam splitter has a pair of rhombus-shaped reflection surfaces, the reflection surfaces are perpendicular to each other, and the vertices of the rhombus-shaped reflection surfaces are arranged on the main optical axis, and has the function of reflecting the light beam of the band corresponding to the large field of view detector and transmitting the light beam of the band where the small field of view detector is located;
[0077] The small field detector is arranged on the side through which the biased beam splitter transmits, and its optical axis -1 coincides with the main optical axis of the telescope system composed of the primary reflector and the secondary reflector. The large field detectors are arranged on both sides of the biased beam splitter, and their optical axis -2 is parallel to the secondary optical axis formed after the main optical axis is reflected by the biased beam splitter, and is arranged outside the secondary optical axis; the entrance pupils of the two large field optical systems are located outside the secondary reflector, in the middle of the edge of the primary reflector and the edge of the secondary reflector, and the entrance pupil diameter of the large field optical system is smaller than the diameter of the primary reflector;
[0078] A detector with a large field of view, which is composed of a detector 2, a refractive lens group, the offset beam splitter, and a reflective surface between the outer side of the secondary reflector and the inner side of the primary reflector to form a refractive telescope optical path, and has a field of view angle of 3.5°-15°;
[0079] The detector with a small field of view is composed of the detector 1, the lens group, the biased beam splitter, the secondary reflector and the primary reflector to form a reflective Cassegrain telescope optical path, and the field of view angle is 0.5-1.5°. Example 5
[0080] As an extended structure of Example 4, the main structure is similar to Example 4, and the main difference is that there are two offset beam splitters. When two offset beam splitters are provided and the beam splitting bands are the same: the detectors are three, including one first detector corresponding to the first preset band light beam and two second detectors corresponding to the second preset band light beams, wherein the fields of view of the two second detectors are consistent, and the fields of view of the first detector and the second detector are inconsistent;
[0081] When two biased beam splitters are provided and the beam splitting bands are different: the beam splitter-1 is transmitted for the first preset band light beam and is reflected for the second band light beam. The beam splitter-2 is transmitted for the first preset band light beam and is reflected for the third band light beam. The detectors are three, including a first detector corresponding to the first preset band light beam, a second detector corresponding to the second preset band light beam and a third detector corresponding to the third preset band light beam, wherein the fields of view of the first detector, the second detector and the third detector are inconsistent.
[0082] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the claims and their equivalents.
Claims
1. A multi-field optical device, characterized in that: include: A main reflector, having an arc-shaped reflective surface, for receiving and focusing light reflected by an observation target, and a through hole is provided at the bottom of the main reflector; A secondary reflector is arranged in the convergent outgoing light path of the primary reflector, and the outgoing light path of the secondary reflector passes through the through hole of the primary reflector; An adjustment lens group is arranged outside the convergence focus of the secondary reflector and is used to reduce the divergence angle of the outgoing light of the secondary reflector; An offset beam splitter, at least one offset beam splitter is disposed in the output light path of the adjustment lens group, and is used to transmit a light beam in a first preset wavelength band and reflect a light beam in a second preset wavelength band; The at least two detectors are a first detector and a second detector, which correspond to light beams of a first preset wavelength band and a second preset wavelength band respectively. The field of view of the first detector and the second detector are different.
2. The multi-field optical device according to claim 1, characterized in that: One offset beam splitter is offsetly arranged on one side of the main axis of the output light of the adjustment lens group, or two offset beam splitters are symmetrically arranged in the main axis of the output light of the adjustment lens group.
3. The multi-field optical device according to claim 2, characterized in that: When one biased beam splitter is provided, the detectors include two detectors, including a first detector corresponding to a light beam of a first preset wavelength band and a second detector corresponding to a light beam of a second preset wavelength band, wherein the fields of view of the first detector and the second detector are inconsistent.
4. The multi-field optical device according to claim 2, characterized in that: When two biased beam splitters are provided and the beam splitting bands are the same: the detectors are three, including one first detector corresponding to a light beam of a first preset wave band and two second detectors corresponding to light beams of a second preset wave band, wherein the fields of view of the two second detectors are consistent, and the fields of view of the first detector and the second detector are inconsistent; When two biased beam splitters are provided and the beam splitting bands are different: the beam splitter-1 is transmitted for the first preset band beam and is reflected for the second band beam; the beam splitter-2 is transmitted for the first preset band beam and is reflected for the third band beam; the detectors are three, including a first detector corresponding to the first preset band beam, a second detector corresponding to the second preset band beam and a third detector corresponding to the third preset band beam, wherein the fields of view of the first detector, the second detector and the third detector are inconsistent.
5. The multi-field optical device according to claim 3, characterized in that: The reflection surface of a biased beam splitter corresponds to the light beam of the second detector band, and the transmission surface corresponds to the light beam of the first detector band.
6. The multi-field optical device according to claim 4, characterized in that: Two offset beam splitters form a rhombus-shaped reflection surface, which are perpendicular to each other. The apex of the rhombus-shaped reflection surface is arranged on the principal optical axis. The rhombus-shaped reflection surface reflects the light beam of the wavelength band corresponding to the second detector and / or the third detector, and transmits the light beam of the wavelength band where the first detector is located.
7. The multi-field optical device according to any one of claims 1 to 6, characterized in that: The field of view angle α of the first detector is smaller than the field of view angle β of the second detector.
8. The multi-field optical device according to claim 7, characterized in that: The first detector is mainly composed of a detector-1 and a lens group. The primary reflector, the secondary reflector, the reflector group, the biased beam splitter, the lens group, and the detector-1 form an optical path of a reflective Cassegrain telescope in the order of an optical path.
9. The multi-field optical device according to claim 8, characterized in that: The field angle α of the detector-1 formed by the reflective Cassegrain telescope optical path is 0.5°-1.5°.
10. The multi-field optical device according to claim 7, characterized in that: The second detector is mainly composed of detector-2 and a refracting lens group. The reflecting surface between the primary reflector and the outer side of the secondary reflector edge, the reflector group, the biased beam splitter, the refracting lens group, and detector-2 constitute the refracting telescope optical path in the order of the optical path.
11. The multi-field optical device according to claim 10, characterized in that: The field angle β of the refracting telescope optical path is 3.5°-15°.
12. The multi-field optical device according to claim 7, characterized in that: The effective incident light spot of the second detector is located in the middle of the edge of the primary reflector and the edge of the secondary reflector, and the effective incident light spot of the first detector is located in the middle of the edge of the primary reflector and the edge of the secondary reflector.
13. The multi-field optical device according to claim 1, characterized in that: A reflector group is also arranged between the adjusting mirror group and the biased beam splitter, and the reflector group consists of a fixed reflector and a reflecting prism. The fixed reflector is arranged at 45° to the main optical axis, and is fixedly connected to the adjusting mirror group, the main reflector and the secondary reflector, and can be driven to rotate around a swing axis by a swing motor; the swing axis coincides with the optical axis of the main optical axis after being reflected by the fixed reflector.