Visible light wave band double-channel integrated optical system

Abstract

The invention discloses a visible light wave band double-channel integrated optical system, and solves the technical problem that an existing optical system cannot meet different measurement requirements at the same time. The optical system comprises a front telescope system, a spectroscope, a first objective lens group and a second objective lens group, the front telescope system comprises a primary reflector, a secondary reflector and a collimating lens group; the spectroscope is located at the emergent end of the collimating lens group and divides the collimated visible light beam into two paths, one path is transmitted, and the other path is reflected; the first objective lens group is located on a transmission light path of the spectroscope, and a first variable diaphragm is arranged between the first objective lens group and the spectroscope; the front telescope system, the spectroscope, the first variable diaphragm and the first objective lens group form a first visible light channel optical system; the second objective lens group is located on the reflection light path of the spectroscope, and a second variable diaphragm is arranged between the second objective lens group and the spectroscope; the front telescope system, the spectroscope, the second iris diaphragm and the second objective lens group form a second visible light channel optical system.

Description

Technical Field

[0001] The present invention relates to a visible light band optical system, in particular to a medium-aperture visible light band dual-channel dual-field integrated optical system. Background Art

[0002] As target measurement tasks continue to increase, the requirements for visible light optical systems are also increasing. On the one hand, they need to meet the requirements of high-quality imaging of targets under high frame rates to ensure high-precision measurement of targets; on the other hand, they also need to meet the requirements of good grayscale resolution under large dynamic range conditions to ensure effective monitoring of target texture characteristics. However, existing visible light optical systems are mostly single-channel optical systems, usually using only a single detector for imaging. Therefore, they cannot simultaneously achieve high-quality imaging of targets under high frame rates and high-level resolution under large dynamic range conditions. As a result, the detectable information is limited and cannot meet the measurement requirements of different detection purposes and detection effects. Summary of the Invention

[0003] The purpose of the present invention is to solve the technical problem that existing optical systems cannot simultaneously achieve high-quality imaging of targets under high frame rate conditions and high-level resolution under large dynamic range conditions, and to provide a dual-channel integrated optical system in the visible light band.

[0004] To achieve the above objectives, the technical solutions provided by the present invention are:

[0005] A dual-channel integrated optical system in the visible light band, which is special in that:

[0006] It includes a front telescopic system, a beam splitter, a first objective lens group and a second objective lens group;

[0007] The front telescope system includes a primary reflector, a secondary reflector, and a collimator group arranged in sequence along the optical path; the primary reflector and the secondary reflector constitute a Cassegrain system, the primary reflector is used to reflect the visible light beam in the incident light, and then the visible light beam is reflected by the secondary reflector and reaches the collimator group;

[0008] The beam splitter is located at the output end of the collimating lens group, and is used to split the visible light beam collimated by the collimating lens group into two paths, one of which is transmitted and the other is reflected;

[0009] The first objective lens group is located on the transmission light path of the beam splitter, and a first variable aperture is provided between the first objective lens group and the beam splitter; the front telescopic system, the beam splitter, the first variable aperture and the first objective lens group form a first visible light channel optical system; the first objective lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens arranged in sequence along the light path; the first lens is arranged near the first variable aperture and is a meniscus heavy flint lens with negative focal power and convex toward the image side; the second lens is a positive focal power biconvex fluorine crown lens; the third lens is a negative focal power biconcave light crown lens; the fourth lens is a positive focal power biconvex optical crystal; the fifth lens is a negative focal power meniscus heavy phosphorus crown lens with negative focal power and convex toward the image side; the sixth lens is a positive focal power biconvex fluorine crown lens; the seventh lens is a negative focal power meniscus heavy flint lens with negative focal power and convex toward the object side;

[0010] The second objective lens group is located on the reflected light path of the beam splitter, and a second variable aperture is provided between the second objective lens group and the beam splitter; the front telescopic system, the beam splitter, the second variable aperture and the second objective lens group form a second visible light channel optical system; the second objective lens group includes an eighth lens, a ninth lens, a tenth lens, an eleventh lens and a twelfth lens arranged in sequence along the light path; the eighth lens is arranged near the second variable aperture and is a positive focal power biconvex optical crystal; the ninth lens is a negative focal power biconcave light crown lens; the tenth lens is a positive focal power biconvex optical crystal; the eleventh lens is a negative focal power, image-side convex meniscus heavy flint lens; the twelfth lens is a positive focal power, object-side convex meniscus heavy phosphorus crown lens.

[0011] Furthermore, the primary reflector is a total reflector with a parabolic surface, a light-clearance diameter of 305 mm, a curvature radius of 1424.1 mm, and a quadratic curve constant of -1; the secondary reflector is a total reflector with a hyperbolic surface, a light-clearance diameter of 103 mm, a curvature radius of 612.54 mm, and a quadratic curve constant of -3.439; the interval between the primary reflector and the secondary reflector is 497.97 mm.

[0012] Furthermore, a first folding mirror is provided between the collimating mirror group and the secondary reflecting mirror, and a second folding mirror is provided between the collimating mirror group and the beam splitter.

[0013] Furthermore, the collimating lens group includes a first collimating lens, a second collimating lens, a third collimating lens, a fourth collimating lens, a fifth collimating lens and a sixth collimating lens arranged in sequence along the optical path;

[0014] The first collimator is arranged close to the first folding mirror, and is a double convex heavy flint lens with positive optical focal length; the second collimator is a double convex lanthanum flint lens with positive optical focal length; the third collimator is a double concave heavy flint lens with negative optical focal length; the fourth collimator is a double convex optical crystal with positive optical focal length; the fifth collimator is a meniscus heavy flint lens with negative optical focal length and convex toward the image side; the sixth collimator is arranged close to the second folding mirror, and is a meniscus heavy flint lens with positive optical focal length and convex toward the image side.

[0015] Furthermore, the thickness of the first collimator is 9.82 mm, the radius of curvature of the front surface is 127.06 mm, and the radius of curvature of the rear surface is -632.4 mm; the thickness of the second collimator is 7 mm, the radius of curvature of the front surface is 333.4 mm, and the radius of curvature of the rear surface is -209.4 mm; the thickness of the third collimator is 5 mm, the radius of curvature of the front surface is -59.43 mm, and the radius of curvature of the rear surface is 55.34 mm; the thickness of the fourth collimator is 25 mm, the radius of curvature of the front surface is 228 mm, and the radius of curvature of the rear surface is -36.9 mm; the thickness of the fifth collimator is 10.57 mm, the radius of curvature of the front surface is -35 mm, and the radius of curvature of the rear surface is -43.35 mm; the thickness of the sixth collimator is 9 mm, the radius of curvature of the front surface is -529.2 mm, and the radius of curvature of the rear surface is -211.8 mm.

[0016] Furthermore, the thickness of the first lens is 20 mm, the radius of curvature of the front surface is -67.3 mm, and the radius of curvature of the rear surface is -81.66 mm; the thickness of the second lens is 20 mm, the radius of curvature of the front surface is 118.58 mm, and the radius of curvature of the rear surface is -51.864 mm; the thickness of the third lens is 6 mm, the radius of curvature of the front surface is -43.75 mm, and the radius of curvature of the rear surface is 50 mm; the thickness of the fourth lens is 21.23 mm, the radius of curvature of the front surface is 5 The thickness of the fifth lens is 6 mm, the radius of curvature of the front surface is -53.21 mm, and the radius of curvature of the rear surface is -146.35 mm; the thickness of the sixth lens is 19.9 mm, the radius of curvature of the front surface is 75.51 mm, and the radius of curvature of the rear surface is -340.4 mm; the thickness of the seventh lens is 19.46 mm, the radius of curvature of the front surface is 51.864 mm, and the radius of curvature of the rear surface is 28.84 mm.

[0017] Furthermore, the eighth lens has a thickness of 7 mm, a front surface curvature radius of 52.77 mm, and a rear surface curvature radius of -144.54 mm; the ninth lens has a thickness of 4.12 mm, a front surface curvature radius of -35.4 mm, and a rear surface curvature radius of 38.37 mm; the tenth lens has a thickness of 11 mm, a front surface curvature radius of 50.7 mm, and a rear surface curvature radius of -33.34 mm; the eleventh lens has a thickness of 8.12 mm, a front surface curvature radius of -31.33 mm, and a rear surface curvature radius of -40.74 mm; and the twelfth lens has a thickness of 4.82 mm, a front surface curvature radius of 48.31 mm, and a rear surface curvature radius of 78.8 mm.

[0018] Furthermore, a third folding mirror is provided between the tenth lens and the eleventh lens.

[0019] Furthermore, the distance between the first variable iris and the first lens is 25 mm; the distance between the second variable iris and the eighth lens is 20 mm; and the apertures of the first variable iris and the second variable iris are both 5 mm to 30 mm.

[0020] Furthermore, the beam splitter is a flat-plate beam splitter, and the beam splitting surface is coated with a beam splitting film, and the light transmitting surface is coated with a multi-layer antireflection film; the beam splitter forms an angle of 45° with the incident visible light axis.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention includes a front telescope system, a beam splitter, a first objective lens group, and a second objective lens group. The beam splitter is designed after the front telescope system to split the visible light beam into two paths through the beam splitter, thereby forming a first visible light channel optical system and a second visible light channel optical system. The first visible light channel optical system can achieve high-quality imaging of the target under high frame rate conditions, and the second visible light channel optical system can achieve high-level resolution under large dynamic range conditions, thereby simultaneously meeting different measurement requirements.

[0023] 2. The present invention provides a first folding mirror, a second folding mirror and a third folding mirror at different positions in the optical path, making the overall structure more compact.

[0024] 3. The present invention provides a first variable iris between the first lens and the beam splitter, and a second variable iris between the eighth lens and the beam splitter. By adjusting the aperture of the corresponding variable iris, the dimming of the corresponding visible light channel optical system is achieved, so that the optical system has the advantages of high imaging quality and strong applicability.

[0025] 4. The light-clearing diameter of the main reflector of the present invention is 305 mm, thereby achieving a medium-sized entrance pupil diameter of the optical system.

[0026] 5. The beam splitter of the present invention forms a 45° angle with the optical axis of the incident visible light, which only causes the optical axis to shift without introducing additional astigmatism. There is no need for additional correction of system aberrations, thereby simplifying the structure of the optical system and making the overall weight lighter. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a light path diagram of the first visible light channel optical system in an embodiment of the present invention.

[0028] Figure 2 2 is a light path diagram of the second visible light channel optical system in an embodiment of the present invention.

[0029] Figure 3 2 is a light path diagram of the front telescopic system in an embodiment of the present invention.

[0030] Figure 4 2 is a light path diagram of the collimating lens assembly in an embodiment of the present invention.

[0031] Figure 5 2 is a light path diagram of the first objective lens group in an embodiment of the present invention.

[0032] Figure 6 2 is a light path diagram of the second objective lens group in an embodiment of the present invention.

[0033] Figure 7 1 is an MTF curve diagram of the first visible light channel optical system with a spatial frequency of 35 lp / mm in an embodiment of the present invention.

[0034] Figure 8 : is an MTF curve diagram of the second visible light channel optical system with a spatial frequency of 74 lp / mm in an embodiment of the present invention.

[0035] Figure 9 Graphs showing spherical aberration, field curvature, and distortion of the first visible light channel optical system in an embodiment of the present invention.

[0036] Figure 10 Graphs showing spherical aberration, field curvature, and distortion of the second visible light channel optical system in an embodiment of the present invention.

[0037] The following are the descriptions of the reference numerals:

[0038] 1-primary reflector, 2-secondary reflector, 3-collimating lens group, 31-first collimating lens, 32-second collimating lens, 33-third collimating lens, 34-fourth collimating lens, 35-fifth collimating lens, 36-sixth collimating lens, 4-beam splitter, 5-first variable aperture, 6-first objective lens group, 61-first lens, 62-second lens, 63-third lens, 64-fourth lens, 65-fifth lens, 66-sixth lens, 67-seventh lens, 7-second variable aperture, 8-second objective lens group, 81-eighth lens, 82-ninth lens, 83-tenth lens, 84-third folding mirror, 85-eleventh lens, 86-twelfth lens, 9-first folding mirror, 10-second folding mirror. DETAILED DESCRIPTION

[0039] In order to make the objects, advantages and features of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and specific examples. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0040] like Figure 1 and Figure 2 As shown, this embodiment provides a dual-channel integrated optical system in the visible light band, including a front telescope system, a beam splitter 4, a first objective lens group 6 and a second objective lens group 8.

[0041] like Figure 3 As shown, the front telescope system includes a primary reflector 1, a secondary reflector 2, and a collimating lens group 3, which are arranged in sequence along the optical path. The primary reflector 1 is used to reflect the visible light beam in the incident light, and the visible light beam then reflects off the secondary reflector 2 and reaches the collimating lens group 3. The beam splitter 4 is located at the output end of the collimating lens group 3 and is used to split the visible light beam collimated by the collimating lens group 3 into two paths, one of which is transmitted and the other is reflected.

[0042] The first objective lens group 6 is located on the transmission light path of the beam splitter 4, and a first variable aperture 5 is provided between the first objective lens group 6 and the beam splitter 4; the front telescopic system, the beam splitter 4, the first variable aperture 5 and the first objective lens group 6 form a first visible light channel optical system ( Figure 1 The focal length of the first visible light channel optical system is 1220 mm, the relative aperture is 1 / 4, and the field of view is 1.12°.

[0043] The first visible light channel optical system combines a front telescope system with a rear imaging system. To meet dimming and focusing requirements, the first visible light channel optical system adopts a secondary imaging system design. The primary optical system is composed of a primary reflector 1 and a secondary reflector 2. The primary optical system, collimating lens group 3, beam splitter 4, first variable aperture 5, and first objective lens group 6 form the first visible light channel optical system. The magnification of the front telescope system is 10, and the light between the collimating lens group 3 and the first objective lens group 6 is parallel. System dimming is achieved by adjusting the size of the first variable aperture 5. In addition, this optical system adopts external focusing, achieving focusing by axially moving the focal plane position.

[0044] The second objective lens group 8 is located on the reflected light path of the beam splitter 4, and a second variable aperture 7 is provided between the second objective lens group 8 and the beam splitter 4; the front telephoto system, the beam splitter 4, the second variable aperture 7 and the second objective lens group 8 form a second visible light channel optical system ( Figure 2 The focal length of the second visible light channel optical system is 1220 mm, the relative aperture is 1 / 4, and the field of view is 0.52°.

[0045] The second visible light channel optical system also utilizes a combination of a front telescope system and a rear imaging system. To meet dimming and focusing requirements, the second visible light channel optical system adopts a secondary imaging system design. The primary optical system is composed of a primary reflector 1 and a secondary reflector 2. The secondary optical system is further composed of the primary optical system, a collimator lens group 3, a beam splitter 4, and a second objective lens group 8. The light between the collimator lens group 3 and the second objective lens group 8 is also parallel, and system dimming is achieved by adjusting the size of the second variable aperture 7. This optical system also uses external focusing, achieving focusing by axially moving the focal plane position.

[0046] The structure of this embodiment is a dual-channel integrated optical system that shares a front telescope system. The method of energy splitting by the beam splitter 4 is used to achieve the separation of the two optical path image planes. The two-path optical system adopts a common optical path design, which has the advantages of reasonable and compact structure, light weight, no parallax, high imaging quality, and the ability to be expanded into a multi-band integrated optical system.

[0047] In this embodiment, the primary reflector 1 is a total reflector with a parabolic surface and a light-clearance of 305 mm, achieving an entrance pupil diameter of Φ305 mm for the optical system. The secondary reflector 2 is a total reflector with a hyperbolic surface and a light-clearance of 103 mm.

[0048] In order to achieve compactness of the overall structure of the optical system, this embodiment provides a first folding mirror 9 between the collimating lens group 3 and the secondary reflector 2 , and a second folding mirror 10 between the collimating lens group 3 and the beam splitter 4 for bending the light path.

[0049] like Figure 4As shown, the collimator lens group 3 includes a first collimator lens 31, a second collimator lens 32, a third collimator lens 33, a fourth collimator lens 34, a fifth collimator lens 35, and a sixth collimator lens 36, which are arranged in sequence along the optical path. The first collimator lens 31 is arranged near the first folding mirror 9 and is a biconvex heavy flint lens with positive optical power; the second collimator lens 32 is a biconvex lanthanum flint lens with positive optical power; the third collimator lens 33 is a biconcave heavy flint lens with negative optical power; the fourth collimator lens 34 is a biconvex optical crystal with positive optical power; the fifth collimator lens 35 is a meniscus heavy flint lens with negative optical power and convex toward the image side; the sixth collimator lens 36 is arranged near the second folding mirror 10 and is a meniscus heavy flint lens with positive optical power and convex toward the image side. The optical parameters of each collimator are shown in Table 1.

[0050] like Figure 5 As shown, the first objective lens group 6 includes a first lens 61, a second lens 62, a third lens 63, a fourth lens 64, a fifth lens 65, a sixth lens 66 and a seventh lens 67 arranged in sequence along the optical path; the first lens 61 is arranged close to the first variable aperture 5, and the distance between the two is 25 mm. The first lens 61 is a meniscus heavy flint lens with negative focal power and convex toward the image side; the second lens 62 is a positive focal power biconvex fluorine crown lens; the third lens 63 is a negative focal power biconcave light crown lens; the fourth lens 64 is a positive focal power biconvex optical crystal; the fifth lens 65 is a negative focal power meniscus heavy phosphorus crown lens convex toward the image side; the sixth lens 66 is a positive focal power biconvex fluorine crown lens; the seventh lens 67 is a negative focal power meniscus heavy flint lens convex toward the object side. The optical parameters of each lens are shown in Table 1.

[0051] like Figure 6 As shown, the second objective lens group 8 includes an eighth lens 81, a ninth lens 82, a tenth lens 83, an eleventh lens 85 and a twelfth lens 86 arranged in sequence along the optical path; the eighth lens 81 is arranged close to the second variable aperture 7, with a distance of 20 mm therebetween. The eighth lens 81 is an optical crystal with positive focal power and biconvexity; the ninth lens 82 is a light crown lens with negative focal power and biconcaveity; the tenth lens 83 is an optical crystal with positive focal power and biconvexity; the eleventh lens 85 is a meniscus heavy flint lens with negative focal power and convex toward the image side; and the twelfth lens 86 is a meniscus heavy phosphorus crown lens with positive focal power and convex toward the object side. The optical parameters of each lens are shown in Table 1.

[0052] Table 1 Optical parameters of each lens (unit: mm)

[0053]

[0054]

[0055]

[0056] In this embodiment, the primary reflector 1 and the secondary reflector 2 are both quadratic surfaces, and their expressions are:

[0057]

[0058] Where, z is the sag of the quadratic surface (z coordinate), unit is mm;

[0059] r——radial distance, unit: mm,

[0060] c——vertex curvature (corresponding to the radius);

[0061] K——conic curve constant.

[0062] In this system, the radius of curvature of the primary reflector 1 is 1424.1 mm, with a quadratic constant K1 = -1. The radius of curvature of the secondary reflector 2 is 612.54 mm, with a quadratic constant K1 = -3.439. The distance between the primary reflector 1 and the secondary reflector 2 is 497.97 mm, and the distance between the secondary reflector 2 and the first collimator 31 is 792.51 mm.

[0063] The first visible light channel optical system is suitable for visible light detectors with a resolution of 1280×1024 and a pixel pitch of 14.6μm×14.6μm; the second visible light channel optical system is suitable for visible light detectors with a resolution of 1280×1024 and a pixel pitch of 6.8μm×6.8μm.

[0064] Similarly, in order to achieve a compact structure, this embodiment further provides a third folding mirror 84 between the tenth lens 83 and the eleventh lens 85 .

[0065] The apertures of the first variable aperture 5 and the second variable aperture 7 are both 5 mm to 30 mm. Of course, the apertures of the two variable apertures can be adjusted accordingly according to actual detection requirements.

[0066] Beamsplitter 4 is a flat-plate quartz mirror with a beam splitting coating on the beam splitting surface and a multi-layer antireflection coating on the other surface. It separates the two optical path image planes by energy splitting. Beamsplitter 4 is tilted 45° and placed in the parallel optical path behind the front telescope system. This causes only an optical axis offset and does not introduce additional astigmatism. This eliminates the need for additional correction of system aberrations, simplifying the optical system structure.

[0067] The main optical system has a focal length of 2366mm, a relative aperture of 1 / 7.76, and a field of view of 1.12°. The collimator lens group 3 has a focal length of 236.6mm, a relative aperture of 1 / 7.76, and a field of view of 11.2°. The first objective lens group 6 has a focal length of 122mm, a relative aperture of 1 / 4, and a field of view of 11.2°. The second objective lens group 8 has a focal length of 122mm, a relative aperture of 1 / 4, and a field of view of 5.2°. The main optical system and collimator lens group 3 form a front telephoto system with a magnification of 10, forming a first visible light channel optical system with a focal length of 1220mm and a second visible light channel optical system with a focal length of 1220mm.

[0068] The working principle of the present invention is as follows: an infinite light beam is reflected by a primary reflector 1 and a secondary reflector 2, the light path is deflected by a first folding mirror 9, and after being collimated by a collimating lens group 3, the light path is deflected by a second folding mirror 10, and the light is split by a beam splitter 4. One path of the transmitted light beam is imaged onto the target surface of a first visible light channel optical system through a first objective lens group 6; the other path of the reflected light beam is imaged onto the target surface of a second visible light channel optical system through a second objective lens group 8. Considering the overall structural layout and external dimensions of the system, a third folding mirror 84 is designed in the second objective lens group 8 for deflecting the light path.

[0069] The optical system design of this embodiment adopts modular design technology. The main optical system, collimating lens group 3, front telescopic system, first objective lens group 6 and second objective lens group 8 are all independently designed and can be independently detected, which is conducive to assembly process control, effectively reduces the difficulty of system installation and adjustment, and ensures high-quality imaging of the optical system.

[0070] Figure 7 This is the MTF curve of the first visible light channel optical system with a spatial frequency of 35lp / mm. Figure 8 This is the MTF curve of the second visible light channel optical system with a spatial frequency of 74lp / mm. It can be seen from the figure that the MTF of the first visible light channel optical system and the second visible light channel optical system are close to the diffraction limit, and the optical systems have high imaging quality.

[0071] Figure 9 is the spherical aberration, field curvature and distortion curve of the first visible light channel optical system, Figure 10 The following graphs show the spherical aberration, field curvature, and distortion of the second visible light channel optical system. As can be seen from the graph, the distortion of both the first and second visible light channel optical systems is minimal. The maximum distortion across the entire field of view for the first visible light channel optical system is less than 0.2%, while that for the second visible light channel optical system is less than 0.4%, fully meeting the requirements for high-precision target measurement.

[0072] In summary, the present invention provides a dual-channel integrated optical system for visible light, in which different channels can achieve different detection objectives and effects. Furthermore, considering the requirements for visible light / infrared image acquisition and fusion processing, the secondary reflector can be used as a beam splitter, forming a multi-band common-aperture integrated optical system, enabling the simultaneous acquisition of beams from different bands. This invention offers advantages such as a compact structure, high imaging quality, and the ability to be expanded into a multi-band integrated optical system.

[0073] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present invention.

Claims

1. A dual-channel integrated optical system in the visible light band, characterized by: It comprises a front telescopic system, a beam splitter (4), a first objective lens group (6) and a second objective lens group (8); The front telescope system comprises a primary reflector (1), a secondary reflector (2), and a collimator lens group (3) arranged in sequence along the optical path; the primary reflector (1) and the secondary reflector (2) constitute a Cassegrain system, the primary reflector (1) is used to reflect a visible light beam in the incident light, and then the visible light beam is reflected by the secondary reflector (2) and reaches the collimator lens group (3); The beam splitter (4) is located at the output end of the collimating lens group (3) and is used to split the visible light beam collimated by the collimating lens group (3) into two paths, one of which is transmitted and the other is reflected; The first objective lens group (6) is located on the transmission light path of the beam splitter (4), and a first variable iris (5) is provided between the first objective lens group (6) and the beam splitter (4); the front telescope system, the beam splitter (4), the first variable iris (5) and the first objective lens group (6) form a first visible light channel optical system; the first objective lens group (6) comprises a first lens (61), a second lens (62), a third lens (63), a fourth lens (64), a fifth lens (65), a sixth lens (66) and a seventh lens (67) arranged in sequence along the light path; the first lens (61) is close to the first lens (61) The first variable aperture (5) is a meniscus heavy flint lens with negative focal power and convex toward the image side; the second lens (62) is a positive focal power biconvex fluorine crown lens; the third lens (63) is a negative focal power biconcave light crown lens; the fourth lens (64) is an optical crystal with positive focal power biconvex; the fifth lens (65) is a meniscus heavy phosphorus crown lens with negative focal power and convex toward the image side; the sixth lens (66) is a positive focal power biconvex fluorine crown lens; the seventh lens (67) is a meniscus heavy flint lens with negative focal power and convex toward the object side; The second objective lens group (8) is located on the reflected light path of the beam splitter (4), and a second variable diaphragm (7) is provided between the second objective lens group (8) and the beam splitter (4); the front telescope system, the beam splitter (4), the second variable diaphragm (7) and the second objective lens group (8) form a second visible light channel optical system; the second objective lens group (8) comprises an eighth lens (81), a ninth lens (82), a tenth lens (83), an eleventh lens (85) and a twelfth lens (86) arranged in sequence along the light path; the eighth lens (81) is arranged close to the second variable diaphragm (7) and is a positive focal power biconvex optical crystal; the ninth lens (82) is a negative focal power biconcave light crown lens; the tenth lens (83) is a positive focal power biconvex optical crystal; the eleventh lens (85) is a negative focal power and image-side convex meniscus heavy flint lens; the twelfth lens (86) is a positive focal power and object-side convex meniscus heavy phosphorus crown lens.

2. The visible light band dual-channel integrated optical system according to claim 1, characterized in that: The main reflector (1) is a total reflector, has a parabolic surface, a light aperture of 305 mm, a curvature radius of 1424.1 mm, and a quadratic curve constant of -1; The secondary reflector (2) is a total reflector, has a hyperbolic surface, a light aperture of 103 mm, a curvature radius of 612.54 mm, and a quadratic constant of -3.439; The interval between the primary reflector (1) and the secondary reflector (2) is 497.97 mm.

3. The visible light band dual-channel integrated optical system according to claim 1 or 2, characterized in that: A first folding mirror (9) is provided between the collimating mirror group (3) and the secondary reflector (2), and a second folding mirror (10) is provided between the collimating mirror group (3) and the beam splitter (4).

4. The visible light band dual-channel integrated optical system according to claim 3, characterized in that: The collimating lens group (3) comprises a first collimating lens (31), a second collimating lens (32), a third collimating lens (33), a fourth collimating lens (34), a fifth collimating lens (35) and a sixth collimating lens (36) which are sequentially arranged along the optical path; The first collimating lens (31) is arranged close to the first folding mirror (9) and is a double convex heavy flint lens with positive optical power; The second collimator (32) is a biconvex lanthanum flint lens with positive optical power; The third collimator (33) is a double concave heavy flint lens with negative optical power; The fourth collimating lens (34) is a biconvex optical crystal with positive optical power; The fifth collimator (35) is a meniscus heavy flint lens with negative optical power and convex toward the image side; The sixth collimating lens (36) is arranged close to the second folding mirror (10) and is a meniscus heavy flint lens with positive optical power and convex toward the image side.

5. The visible light band dual-channel integrated optical system according to claim 4, characterized in that: The thickness of the first collimator (31) is 9.82 mm, the radius of curvature of the front surface is 127.06 mm, and the radius of curvature of the rear surface is -632.4 mm; The thickness of the second collimator (32) is 7 mm, the curvature radius of the front surface is 333.4 mm, and the curvature radius of the rear surface is -209.4 mm; The thickness of the third collimating mirror (33) is 5 mm, the curvature radius of the front surface is -59.43 mm, and the curvature radius of the rear surface is 55.34 mm; The fourth collimating mirror (34) has a thickness of 25 mm, a front surface curvature radius of 228 mm, and a rear surface curvature radius of -36.9 mm; The fifth collimator (35) has a thickness of 10.57 mm, a front surface curvature radius of -35 mm, and a rear surface curvature radius of -43.35 mm; The sixth collimating mirror (36) has a thickness of 9 mm, a front surface curvature radius of -529.2 mm, and a rear surface curvature radius of -211.8 mm.

6. The visible light band dual-channel integrated optical system according to claim 1, characterized in that: The thickness of the first lens (61) is 20 mm, the curvature radius of the front surface is -67.3 mm, and the curvature radius of the rear surface is -81.66 mm; The thickness of the second lens (62) is 20 mm, the radius of curvature of the front surface is 118.58 mm, and the radius of curvature of the rear surface is -51.864 mm; The thickness of the third lens (63) is 6 mm, the curvature radius of the front surface is -43.75 mm, and the curvature radius of the rear surface is 50 mm; The fourth lens (64) has a thickness of 21.23 mm, a front surface curvature radius of 56.23 mm, and a rear surface curvature radius of -43.75 mm; The fifth lens (65) has a thickness of 6 mm, a front surface curvature radius of -53.21 mm, and a rear surface curvature radius of -146.35 mm; The sixth lens (66) has a thickness of 19.9 mm, a front surface curvature radius of 75.51 mm, and a rear surface curvature radius of -340.4 mm; The thickness of the seventh lens (67) is 19.46 mm, the radius of curvature of the front surface is 51.864 mm, and the radius of curvature of the rear surface is 28.84 mm.

7. The visible light band dual-channel integrated optical system according to claim 1, characterized in that: The eighth lens (81) has a thickness of 7 mm, a front surface curvature radius of 52.77 mm, and a rear surface curvature radius of -144.54 mm; The ninth lens (82) has a thickness of 4.12 mm, a front surface curvature radius of -35.4 mm, and a rear surface curvature radius of 38.37 mm; The thickness of the tenth lens (83) is 11 mm, the radius of curvature of the front surface is 50.7 mm, and the radius of curvature of the rear surface is -33.34 mm; The thickness of the eleventh lens (85) is 8.12 mm, the radius of curvature of the front surface is -31.33 mm, and the radius of curvature of the rear surface is -40.74 mm; The thickness of the twelfth lens (86) is 4.82 mm, the curvature radius of the front surface is 48.31 mm, and the curvature radius of the rear surface is 78.8 mm.

8. The visible light band dual-channel integrated optical system according to claim 7, characterized in that: A third folding mirror (84) is further provided between the tenth lens (83) and the eleventh lens (85).

9. The visible light band dual-channel integrated optical system according to claim 8, characterized in that: The distance between the first variable iris (5) and the first lens (61) is 25 mm; the distance between the second variable iris (7) and the eighth lens (81) is 20 mm; and the light apertures of the first variable iris (5) and the second variable iris (7) are both 5 mm to 30 mm.

10. The visible light band dual-channel integrated optical system according to claim 1, characterized in that: The beam splitter (4) is a flat-plate beam splitter, with a beam splitting surface coated with a beam splitting film and a light-transmitting surface coated with a multi-layer anti-reflection film; the beam splitter (4) forms an angle of 45° with the optical axis of the incident visible light.

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