Wide-spectrum long-exit-pupil-distance optical system for multi-source optical signal simulation

Abstract

The invention provides a wide-spectrum long-exit-pupil-distance optical system for multi-source optical signal simulation, which belongs to the technical field of optical equipment and comprises a visible light engine, an aberration correction lens group, a dichroic spectroscope, an infrared beam combining module, a common-optical-path collimating lens group and a diaphragm which are arranged along an optical path. The infrared beam combining module comprises a medium-wave infrared optical engine, a long-wave infrared optical engine and an infrared beam splitting prism for combining medium-wave infrared and long-wave infrared beams; a light beam emitted by the visible light engine sequentially passes through the aberration correction lens group and the dichroic spectroscope; light beams emitted by the medium-wave infrared optical engine and the long-wave infrared optical engine are combined through the infrared beam splitter prism and then are combined with visible light beams through the dichroic spectroscope to form multi-spectral composite light beams, the common-optical-path collimating lens set is of an off-axis three-reflector structure, and through the common-caliber design, the multi-spectral composite light beams are formed. A complex structure is integrated into a relatively compact frame, and the overall size and complexity of the system are reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of optical equipment, and specifically relates to a wide-spectrum long-ocular-distance optical system for multi-source optical signal simulation. BACKGROUND

[0002] Ground detection is one of important means for function detection and performance verification of space equipment, can ensure the efficient operation of the equipment after entering the orbit, and can promote the continuous iteration of the performance of the equipment, and effectively overcomes the disadvantages of high experimental cost, long cycle and poor repeatability in the real space environment. The space target simulation equipment is a ground detection equipment developed for space optical detection, which can simulate infinite or quasi-infinite targets, and the optical system is the main medium for converting electrical signals into optical signals, so the structure form will directly affect the performance of the equipment. The structure form of the optical system of the multi-source information simulator commonly used in the prior art mainly includes a split spectrum single space target simulator optical system and a composite spectrum integrated space target simulator optical system.

[0003] The split spectrum single space target simulator generally refers to a split type simulator independent of different spectral bands, and the working spectral band of each simulator optical system generally includes ultraviolet, visible, medium wave infrared and long wave infrared independent working spectral bands.

[0004] The ultraviolet simulator commonly adopts an ultraviolet material to form a transmission type optical system, and each system can generally cover a width of about 100 nm in a spectral band range of 240-450 nm. The development of the optical system of the visible light simulator is relatively comprehensive, and the working spectral band can cover the visible light range (400-800 nm). The infrared simulator selects a black body radiation source, which can provide a signal of 2-12 mu m according to the temperature difference, and the optical system commonly adopts an infrared material transmission system or a reflection system, which can generally cover a spectral band width of 1-5 mu m.

[0005] The performance indicators of the traditional split spectrum optical system can reach the ground detection experiment standard, but the spectral band coverage is narrow due to the limitation of the material, and the continuous spectral band space target display cannot be realized. If the continuous spectral band light signal is to be output, a plurality of independent light paths with different optical apertures are required, which is high in cost, low in integration, and poor in matching with the detector, and the continuous display of the multi-spectral band space target cannot be realized.

[0006] The composite spectrum integrated space target simulator is generally applied to the scene where a plurality of spectral bands work at the same time, and therefore the optical system thereof needs to adopt a reflection type optical structure to enhance the adaptability of the working spectral band.

[0007] The light path control of the composite spectrum integrated optical system is difficult, the exit pupil distance and the optical performance are difficult to balance, the exit pupil position is not easy to control, the short exit pupil distance is difficult to apply to the detection system with the entrance pupil built-in, the energy receiving of the detector and the system aperture are required to be high, and the applicability of the whole system is sacrificed. SUMMARY

[0008] In view of the above problems of the prior art, the technical problem to be solved by the embodiments of the present application is to provide a wide-spectrum long-exit-pupil-distance optical system for multi-source optical signal simulation.

[0009] To solve the above technical problem, the present application provides the following technical scheme: A wide-spectrum long-exit-pupil-distance optical system for multi-source optical signal simulation, comprising a visible light engine, an aberration correction lens group, a dichroic beam splitter, an infrared beam combining module, a common-path collimating lens group and a diaphragm arranged along the light path. The infrared beam combining module comprises a medium-wave infrared optical engine, a long-wave infrared optical engine and an infrared beam splitter prism for combining the medium-wave infrared and long-wave infrared beams. The light beam emitted by the visible light engine passes through the aberration correction lens group and the dichroic beam splitter in sequence. The light beams emitted by the medium-wave infrared optical engine and the long-wave infrared optical engine are combined by the infrared beam splitter prism, then combined with the visible light beam by the dichroic beam splitter, forming a multi-spectrum composite light beam, which is emitted by the diaphragm through the common-path collimating lens group. The common-path collimating lens group is an off-axis three-mirror structure.

[0010] As a further improved scheme, the common-path collimating lens group comprises a concave spherical mirror, a convex flat spherical mirror and a concave ellipsoidal mirror arranged in sequence along the propagation direction of the multi-spectrum composite light beam. The multi-spectrum composite light beam is collimated by the concave spherical mirror, the convex flat spherical mirror and the concave ellipsoidal mirror in sequence, and then emitted by the diaphragm.

[0011] As a further improved scheme, the aberration correction lens group is composed of five lenses arranged in sequence along the light path direction, i.e., a first biconvex lens, a first biconcave lens, a positive crescent lens, a second biconcave lens and a second biconvex lens.

[0012] As a further improved scheme, the concave spherical mirror is off-axis along the negative direction of the y-axis, and the off-axis amount ΔY1 satisfies: -170mm < ΔY1 < -160mm. The concave ellipsoidal mirror is off-axis along the positive direction of the y-axis, and the off-axis amount ΔY2 satisfies: 170mm < ΔY2 < 180mm.

[0013] As a further improved scheme: the convex hemispherical mirror and the concave ellipsoidal mirror are aspherical mirrors, and aspherical conic coefficients κ1 and κ2 of the aspherical mirrors satisfy 0 < κ1 < 10 and -1 < κ2 < 0 respectively.

[0014] As a further improved scheme: the following relationship is satisfied: -0.794 < f / f6 < -0.791; 1.483 < f / f7 < 1.486; -1.382 < f / f8 < -1.378; Wherein, f is the focal length of the optical system, f6, f7 and f8 are the focal lengths of the concave spherical mirror, the convex hemispherical mirror and the concave ellipsoidal mirror respectively.

[0015] As a further improved scheme: the focal lengths f1 to f5 of the five lenses in the aberration correction lens group and the system focal length f satisfy the following relationship: -2.37 < f / f1 < -2.32; 0.303 < f / f2 < 0.306; -2.401 < f / f3 < -2.398; 3.214 < f / f4 < 3.218; -0.73 < f / f5 < -0.727; Wherein, f is the focal length of the optical system, f1, f2, f3, f4 and f5 are the focal lengths of the first biconvex lens, the first biconcave lens, the positive meniscus lens, the second biconcave lens and the second biconvex lens respectively.

[0016] Compared with the prior art, the beneficial effects of the present application are: through the co-caliber design, the complex structure of the originally required four independent systems is integrated into a relatively compact frame, the overall volume and complexity of the system are reduced, and the wide-spectrum integration design of the visible spectrum, the medium-wave infrared spectrum and the long-wave infrared spectrum is realized.

[0017] Two pieces of beam splitter and a segment of off-axis three-mirror type multi-source integrated collimating mirror group are adopted, on the basis of not sacrificing the image quality, the great freedom of off-axis design enables the system to also complete the design of the external pupil, the pupil of the system is guided to a structure which is convenient and reasonable in optics, sufficient docking space is left for the measured equipment, and excellent usability is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a working principle diagram of a wide-spectrum long-pupil distance optical system for multi-source optical signal simulation; Figure 2It is a schematic diagram of the overall structure of a wide-spectrum long-eyepoint optical system for multi-source optical signal simulation. Figure 3 It is a full-spectrum long-eyepoint optical system design diagram of a wide-spectrum long-eyepoint optical system for multi-source optical signal simulation. Figure 4 It is a visible light system MTF curve diagram of a wide-spectrum long-eyepoint optical system for multi-source optical signal simulation. Figure 5 It is a visible light system spot diagram of a wide-spectrum long-eyepoint optical system for multi-source optical signal simulation. Figure 6 It is a visible light system grid distortion diagram of a wide-spectrum long-eyepoint optical system for multi-source optical signal simulation. Figure 7 It is a mid-wave infrared system MTF curve diagram of a wide-spectrum long-eyepoint optical system for multi-source optical signal simulation. Figure 8 It is a mid-wave infrared system spot diagram of a wide-spectrum long-eyepoint optical system for multi-source optical signal simulation. Figure 9 It is a mid-wave infrared system grid distortion diagram of a wide-spectrum long-eyepoint optical system for multi-source optical signal simulation. Figure 10 It is a long-wave infrared system MTF curve diagram of a wide-spectrum long-eyepoint optical system for multi-source optical signal simulation. Figure 11 It is a long-wave infrared system spot diagram of a wide-spectrum long-eyepoint optical system for multi-source optical signal simulation. Figure 12 It is a long-wave infrared system grid distortion diagram of a wide-spectrum long-eyepoint optical system for multi-source optical signal simulation. In the figure: 1, light source; 2, long-wave infrared optical engine; 3, mid-wave infrared optical engine; 4, infrared spectrometer prism; 5, dichroic beam splitter; 6, concave spherical mirror; 7, convex flat spherical mirror; 8, concave ellipsoidal mirror; 9, diaphragm. DETAILED DESCRIPTION

[0019] The technical solutions of the present application will be further described in detail below in combination with specific embodiments.

[0020] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0021] Please refer to Figures 1 to 3 In one embodiment, a wide-spectrum long-eyepoint optical system for multi-source optical signal simulation includes a visible light engine, an aberration correction lens group A, a dichroic beam splitter 5, an infrared beam combination module, a common-path collimating lens group, and a diaphragm 9 arranged along an optical path; The infrared beam combination module includes a mid-wave infrared optical engine 3, a long-wave infrared optical engine 2, and an infrared beam splitter prism 4 for combining the mid-wave infrared and long-wave infrared beams. The light beam emitted by the visible light engine passes through the aberration correction lens group A and the dichroic beam splitter 5 in turn. The light beams emitted by the mid-wave infrared optical engine 3 and the long-wave infrared optical engine 2 are combined by the infrared beam splitter prism 4, then combined with the visible light beam by the dichroic beam splitter 5 to form a multi-spectrum composite light beam, and exit from the diaphragm 9 through the common-path collimating lens group. The common-path collimating lens group is of an off-axis three-mirror structure.

[0022] In this embodiment, a wide-spectrum integrated space target simulator optical system covering visible light (380-780 nm), mid-wave infrared (3-5 μm), and long-wave infrared (6-12 μm) is designed and implemented by adopting three wavelength configurations. The common-path collimating lens group is used to constrain the composite light path and fundamentally eliminates the central obstruction. The near-symmetrical off-axis structure ensures high MTF and superior image quality while realizing the out-of-pupil placement, with an eyepoint distance greater than 1000 mm, which facilitates the matching with the measured device pupil and improves the system versatility.

[0023] The three configurations of the system are suitable for visible systems, mid-wave infrared systems, and long-wave infrared systems, respectively. The visible system is equipped with an aberration correction lens group A to compensate for aberration. The visible light signal passes through the aberration correction lens group A, and the mid-wave / long-wave infrared system light signal passes through a dichroic beam splitter 5. The mid-wave and long-wave infrared signals pass through an infrared beam splitter prism 4. The light beams of the three configurations are mixed and then pass through the common-path collimating lens group.

[0024] Please refer to Figures 1 to 3 As another embodiment of the present application, the common-path collimating lens group includes a concave spherical mirror 6, a convex flat spherical mirror 7, and a concave ellipsoidal mirror 8 arranged in the order of the multi-spectrum composite light beam propagation direction. The multi-spectrum composite light beam is collimated by the concave spherical mirror 6, the convex flat spherical mirror 7, and the concave ellipsoidal mirror 8 in turn and then exits from the diaphragm 9.

[0025] In the embodiment, the off-axis three-mirror part of the common-path collimator group is composed of two off-axis ellipsoidal mirrors and one spherical mirror, and is arranged in the direction from the beam combiner to the diaphragm 9, wherein the first and third mirrors are a concave spherical mirror 6 and a concave ellipsoidal mirror 8 respectively, and the second mirror is a convex flat-topped mirror 7. The light beam is adjusted to be parallel light by the common-path collimator group, and then is emitted from the diaphragm 9.

[0026] The light signals emitted by the long-wave infrared optical engine 2 and the medium-wave infrared optical engine 3 of the system pass through the infrared light splitting prism 4 to be combined, the light signal emitted by the visible optical engine passes through the aberration correction lens group A and the dichroic mirror 5 to be combined with the infrared signal, and the fused multi-spectral composite light beam passes through the concave spherical mirror 6, the convex flat-topped mirror 7 and the concave ellipsoidal mirror 8 in turn, and is finally emitted from the diaphragm 9.

[0027] Please refer to Figures 1 to 3 As another embodiment of the present application, the aberration correction lens group A is composed of five lenses, and is arranged in the direction from the visible light source 1 to the dichroic mirror 5, and is respectively designed with two groups of double-separated mirror groups and one single lens, wherein the first lens in the first group of double-separated mirror groups is a first double-convex lens, and the second lens is a first double-concave lens; the first lens in the second group is a positive meniscus lens, and the second lens is a second double-concave lens; and the last single lens is a second double-convex lens, and the materials thereof are QF1, D-ZLAF61, H-QF14, H-ZBAF5 and H-K3 respectively.

[0028] In the embodiment, the aberration correction lens group A contains five lenses, and is arranged in the direction from the visible light source 1 to the dichroic mirror 5, and is respectively designed with two groups of double-separated mirror groups and one single lens, wherein the first lens in the first group of double-separated mirror groups is a first double-convex lens, and the second lens is a first double-concave lens; the first lens in the second group is a positive meniscus lens, and the second lens is a second double-concave lens; and the last single lens is a second double-convex lens, and the materials thereof are QF1, D-ZLAF61, H-QF14, H-ZBAF5 and H-K3 respectively.

[0029] As another embodiment of the present application, the concave spherical mirror 6 is off-axis along the negative direction of the y-axis, and the off-axis amount ΔY1 satisfies: -170mm<ΔY1<-160mm. The concave ellipsoidal mirror 8 is off-axis along the positive direction of the y-axis, and the off-axis amount ΔY2 satisfies: 170mm<ΔY2<180mm.

[0030] The convex flat-topped mirror 7 and the concave ellipsoidal mirror 8 are aspheric mirrors, and the aspheric conic coefficients κ1 and κ2 thereof respectively satisfy: 0<κ1<10 and -1<κ2<0.

[0031] The following relationship is satisfied: -0.794<f / f6<-0.791; 1.483<f / f7<1.486; -1.382<f / f8<-1.378; Wherein, f is the focal length of the optical system, f6, f7, f8 are the focal lengths of the concave spherical mirror 6, the convex flat spherical mirror 7 and the concave ellipsoidal mirror 8 respectively.

[0032] In the embodiment, the collimating mirror group of the system contains three mirrors: the air gap between the dichroic beam splitter 5 and the concave spherical mirror 6 is 518.139mm, the concave spherical mirror 6 is off-axis about 170mm along the y negative direction, the air gap between the concave spherical mirror 6 and the convex flat spherical mirror 7 is 508.139mm, the air gap between the convex flat spherical mirror 7 and the concave ellipsoidal mirror 8 is 448.138mm, the concave ellipsoidal mirror 8 is off-axis about 170mm along the y positive direction, and the air gap between the concave ellipsoidal mirror 8 and the diaphragm 9 is 1044.241mm.

[0033] As another embodiment of the application: the focal lengths f1 to f5 of the five lenses in the aberration correction lens group A and the system focal length f satisfy the following relationship: -2.37<f / f1<-2.32, 0.5<R1 / f1<1, -2.5<R2 / f1<-2; 0.303<f / f2<0.306, 2<R3 / f2<2.5, -1.5<R4 / f2<-1; -2.401<f / f3<-2.398, -21<R5 / f3<-20, -1<R6 / f3<-0.5; 3.214<f / f4<3.218, 0.5<R7 / f4<1, -6<R8 / f4<-5.5; -0.73<f / f5<-0.727, 1.5<R9 / f5<2, -1<R10 / f5<-0.5; 10 ; Wherein, f is the focal length of the optical system, f1, f2, f3, f4, f5 are the focal lengths of the first biconvex lens, the first biconcave lens, the positive crescent lens, the second biconcave lens and the second biconvex lens respectively, and R1-R10 are the curvature radii of the ten surfaces of the five lenses of the system in turn. 10

[0034] In the embodiment, the air gap between the visible light engine and the aberration correction lens group A is 50mm, the air gap between the two double separation groups of the aberration correction lens group A is 37.46mm, the air gap between the first double separation group is 0.683mm, the air gap between the second double separation group is 1.19mm, the air gap between the second double separation group and the second biconvex lens is 12.312mm, and the air gap between the second biconvex lens and the dichroic beam splitter 5 is 75mm.

[0035] The following table is the parameter table of the wide spectrum integrated optical system provided by the application. ​

[0036]

[0037] The MTF of the visible light system is shown in FIG. 6, and the MTF curves of each field of view and wavelength have approached the diffraction limit, indicating good imaging quality. Figure 4

[0038] The optical design spot diagram of the visible light system is shown in FIG. 7, and the RMS radius values of the full field of view spot are all within the range of 7 μm, indicating good imaging quality. Figure 5 Unlike the coaxial system, the off-axis optical system uses grid distortion to evaluate the system distortion. Since the off-axis optical system uses off-axis imaging, the off-axis aberration is large, as shown in FIG. 8, and the maximum distortion of the visible light system is not more than 0.3%.

[0039] Figure 6

[0040] The air gap between the middle wave infrared optical engine 3 of the system and the infrared spectral prism 4 is 90 mm, and the air gap between the infrared spectral prism 4 and the dichroic spectral prism 5 is 111.458 mm.

[0041] The focal length of the middle wave infrared optical system configuration is -229 mm, and the working wavelength covers 3-5 μm.

[0042] The MTF of the middle wave infrared system is shown in FIG. 10, and the MTF curves of each field of view and wavelength have approached the diffraction limit, indicating good imaging quality. Figure 7 The optical design spot diagram of the middle wave infrared system is shown in FIG. 11, and the RMS radius values of the full field of view spot are all within the range of 7 μm, indicating good imaging quality.

[0043] Figure 8

[0044] As shown in FIG. 12, the maximum distortion of the middle wave infrared system is not more than 0.8%. Figure 9 The air gap between the long wave infrared optical engine 2 of the system and the infrared spectral prism 4 is 90 mm.

[0045] The focal length of the long wave infrared optical system configuration is -229 mm, and the working wavelength covers 6-12 μm.

[0046] The MTF of the long wave infrared system is shown in FIG. 14, and the MTF curves of each field of view and wavelength have approached the diffraction limit, indicating good imaging quality.

[0047] Figure 10 The optical design spot diagram of the long wave infrared system is shown in FIG. 15, and the RMS radius values of the full field of view spot are all within the range of 10 μm, indicating good imaging quality.

[0048] Figure 11 ​​​​​​​​

[0049] As shown in Figure 12 The maximum distortion of the long-wave infrared system is not more than 0.8%.

[0050] Traditional transmission materials are difficult to maintain good transmittance and consistent refractive characteristics in the range from visible light (400 nm) to long-wave infrared (12 μm), and there is a dispersion characteristic. The requirement of a wide spectrum leads to a serious chromatic aberration. Therefore, the traditional scheme usually needs to design independent optical systems for different spectral bands, which is very bulky and difficult to align. The imaging performance of the reflective optical system is independent of the wavelength, so all bands from visible light to medium and long-wave infrared can be imaged on the same optical system, which fundamentally solves the problem of excessive chromatic aberration, which makes it possible to realize full-spectrum coverage.

[0051] The traditional space target simulator optical system is difficult to integrate light signal outputs of multiple different spectral bands, and is slightly insufficient for detection experiments of various detectors. The present application integrates the complex structure of the original four independent systems into a relatively compact framework (total length of the system is 1100 mm) through common aperture design, reduces the overall volume and complexity of the system. Wide-spectrum integrated design of the visible light spectrum (0.4~0.8 μm), the medium-wave infrared spectrum (3~5 μm) and the long-wave infrared spectrum (6~12 μm) is realized, which can meet the detection experiment requirements of most current detectors in one-to-many.

[0052] The present application adopts two pieces of beam splitter and a multi-source integrated collimating mirror group of off-axis three-mirror type, on the basis of not sacrificing image quality, the great freedom of off-axis design enables the system to also complete the design of external exit pupil (exit pupil distance is about 1000 mm), the exit pupil of the system is guided to a position which is convenient in structure and reasonable in optics, leaving sufficient docking space for the measured device, and has excellent usability.

[0053] It is apparent to those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the present application being defined by the appended claims rather than the foregoing description, and it is intended to encompass all changes falling within the meaning and scope of the equivalent elements of the claims, and no figure reference in the claims should be considered as limiting the claims involved.

[0054] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature or implementation described herein. The specification can include implicit combinations of explicitly mentioned features and / or implicit combinations of implicitly mentioned features. Such combinations are also expressly included within the scope of the specification and an embodiment.

Claims

1. A broadband long exit pupil optical system for multi-source optical signal simulation, characterized in that, It includes a visible light engine, an aberration correction mirror group, a dichroic beam splitter, an infrared beam combiner module, a common-path collimating mirror group, and an aperture arranged along the optical path; The infrared beam combining module includes a mid-wave infrared optical engine, a long-wave infrared optical engine, and an infrared beam splitter prism for combining mid-wave infrared and long-wave infrared beams. The light beam emitted by the visible light engine passes sequentially through the aberration correction mirror group and the dichroic beam splitter. The beams emitted by the mid-wave infrared optical engine and the long-wave infrared optical engine are combined by the infrared beam splitter, and then combined with the visible beam by the dichroic beam splitter to form a multi-spectral composite beam, which is then emitted from the aperture through the common-path collimating lens group. The common-path collimating lens group is an off-axis three-mirror structure.

2. The broadband long exit pupil optical system for multi-source optical signal simulation according to claim 1, characterized in that, The common-path collimating mirror group includes a concave spherical mirror, a convex oblate spherical mirror, and a concave ellipsoidal mirror arranged sequentially along the propagation direction of the multi-spectral composite beam. The multi-spectral composite beam is collimated sequentially by the concave spherical mirror, the convex oblate spherical mirror, and the concave ellipsoidal mirror before exiting through the aperture.

3. A broadband long exit pupil optical system for multi-source optical signal simulation according to claim 1, characterized in that, The aberration correction lens group consists of five lenses, arranged sequentially along the optical path as follows: a first biconvex lens, a first biconcave lens, a meniscus lens, a second biconcave lens, and a second biconvex lens.

4. A broadband long exit pupil optical system for multi-source optical signal simulation according to claim 2, characterized in that, The concave spherical mirror is off-axis along the negative y-axis direction, and the off-axis amount ΔY1 satisfies: -170mm < ΔY1 < -160mm; The concave ellipsoidal reflector is off-axis along the positive y-axis, and the off-axis amount ΔY2 satisfies: 170mm < ΔY2 < 180mm.

5. A broadband long exit pupil optical system for multi-source optical signal simulation according to claim 4, characterized in that, The convex oblate spherical mirror and the concave ellipsoidal mirror are aspherical mirrors, and their aspherical conic coefficients κ1 and κ2 satisfy: 0<κ1<10, -1<κ2<0 respectively.

6. A broadband long exit pupil optical system for multi-source optical signal simulation according to claim 5, characterized in that, The following relationship must be satisfied: -0.794 <f / f6<-0.791; 1.483 <f / f7<1.486; -1.382 <f / f8<-1.378; Where f is the focal length of the optical system, and f6, f7, and f8 are the focal lengths of the concave spherical mirror, the convex oblate spherical mirror, and the concave ellipsoidal mirror, respectively.

7. A broadband long exit pupil optical system for multi-source optical signal simulation according to claim 3, characterized in that, The focal lengths f1 to f5 of the five lenses in the aberration correction lens group satisfy the following relationship with the system focal length f: -2.37 <f / f1<-2.32; 0.303 <f / f2<0.306; -2.401 <f / f3<-2.398; 3.214 <f / f4<3.218; -0.73 <f / f5<-0.727; Where f is the focal length of the optical system, and f1, f2, f3, f4, and f5 are the focal lengths of the first biconvex lens, the first biconcave lens, the crescent-shaped lens, the second biconcave lens, and the second biconvex lens, respectively.

Images