CN111045102A - Infrared and laser receiving common-caliber composite detection system - Google Patents
Infrared and laser receiving common-caliber composite detection system Download PDFInfo
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- CN111045102A CN111045102A CN201911383975.6A CN201911383975A CN111045102A CN 111045102 A CN111045102 A CN 111045102A CN 201911383975 A CN201911383975 A CN 201911383975A CN 111045102 A CN111045102 A CN 111045102A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
Abstract
The invention discloses an infrared and laser receiving common-caliber composite detection system, which comprises a common lens group, a laser lens group and an infrared lens group; the shared lens group, the laser lens group and the infrared lens group are arranged on the same optical axis; the shared mirror group is used for separating colors of the infrared laser mixed light in a convergence light path; the color separation is to transmit laser and reflect infrared; the laser mirror group is arranged at the end side of the transmission of the common mirror group and is used for imaging the transmitted laser; the infrared mirror group is arranged at the end side reflected by the common mirror group and is used for imaging infrared rays. The infrared laser mixed light is subjected to color separation in a convergent light path through the shared lens group, infrared rays are reflected, laser rays are transmitted, oblique aberration caused by the use of a parallel flat plate is avoided in the light path, the aberration is corrected through the laser lens group by the transmitted laser rays, the aberration is corrected through the infrared lens group by the reflected infrared rays, and the imaging quality is good; the system has flexible and compact structure; the effect of inhibiting veiling glare is good.
Description
Technical Field
The invention relates to the technical field of target detection, in particular to an infrared and laser receiving common-caliber composite detection system.
Background
In the fields of aerospace and military detection, the laser and infrared common-caliber composite detection system can acquire more targets and background information, and has important application value. The space inside the device carrying such a detection system is usually very limited, so that the requirements of multiple functions, miniaturization and light weight of the system must be considered while the technical indexes are met in the design process.
Common laser and infrared common-caliber composite detection systems can be divided into transmission type and refraction and reflection type designs, and for the scheme of the transmission type system, on one hand, the span of working wave bands of laser and infrared is large, and the optical materials which are transmitted by two optional wave bands are few, so that the imaging quality requirement is difficult to meet; on the other hand, for a system with a focal length greater than 500mm, the space compactness of the transmission structure is difficult to achieve; therefore, the catadioptric scheme is more beneficial to realizing the system design with larger caliber and compact layout.
However, for the catadioptric system, a coaxial catadioptric system is mostly adopted in the prior art, after light is reflected by a primary reflector and a secondary reflector, incident light of two wave bands is separated through a light splitting flat plate and respectively enters respective detectors, and the design of a composite optical system is realized. However, the use of parallel plates introduces uncorrectable oblique aberrations, and the plates can cause severe cold reflections from the infrared optics, which can affect the detection capabilities of the system. Meanwhile, the flat plate is generally very thin and is easy to damage, so that the difficulty is increased for installation and adjustment.
Disclosure of Invention
In view of the above, the present invention provides an infrared and laser receiving common-aperture composite detection system, which performs color separation on infrared laser mixed light in a converging light path through a common lens group, reflects infrared and transmits laser light, avoids oblique aberration caused by the use of parallel flat plates in the light path, corrects aberration through the laser lens group for the transmitted laser light, corrects aberration through the infrared lens group for the reflected infrared light, and has good imaging quality.
The invention relates to an infrared and laser receiving common-caliber composite detection system, which comprises a common lens group, a laser lens group and an infrared lens group;
the shared lens group, the laser lens group and the infrared lens group are arranged on the same optical axis;
the shared mirror group is used for separating colors of the infrared laser mixed light in a convergence light path; the color separation is to transmit laser and reflect infrared;
the laser mirror group is arranged at the end side of the transmission of the common mirror group and is used for imaging the transmitted laser;
the infrared mirror group is arranged at the end side reflected by the common mirror group and is used for imaging infrared rays.
Preferably, the shared mirror group comprises a primary mirror and a secondary mirror, the primary mirror converges the infrared laser mixed light to the secondary mirror end face, and the secondary mirror divides the converged infrared laser mixed light into transmitted laser and reflected infrared.
Preferably, the primary mirror is a concave aspherical mirror; the reflecting surface of the primary mirror is a standard quadric surface or a high-order aspheric surface; the primary mirror is made of one of aluminum, silicon carbide, beryllium aluminum and microcrystalline glass.
Preferably, the secondary mirror is a quadric dichroic mirror; the secondary mirror is made of one of silicon, quartz and K9 glass; the secondary mirror is plated with a laser-transmitting infrared-reflecting film.
Preferably, the laser mirror group includes the first lens of laser, laser second lens, laser third lens, the first mirror of turning of laser, the second mirror of turning of laser, the fourth lens of laser, the fifth lens of laser, the sixth lens of laser, the seventh lens of laser and laser detector, infrared laser hybrid light divides the color of the mirror group of sharing and transmits laser to the first lens of laser, passes through in proper order again laser second lens, laser third lens, the first mirror of turning of laser, the second mirror of turning of laser, the fourth lens of laser, the fifth lens of laser, the sixth lens of laser and laser seventh lens focus formation of image on the laser detector.
Preferably, the laser mirror group further comprises an aperture diaphragm and a laser narrow-band filter; the pinhole diaphragm is arranged between the laser first folding mirror and the laser second folding mirror; the laser narrowband filter is arranged between the laser fourth lens and the laser fifth lens.
Preferably, the light incident surface of the first laser lens is a convex spherical surface, and the light emergent surface is a concave spherical surface; the light incident surface of the laser second lens is a concave spherical surface, and the light emergent surface of the laser second lens is a convex spherical surface; the light incident surface of the laser third lens is a convex spherical surface, and the light emergent surface of the laser third lens is a convex spherical surface; the light incident surface of the fourth laser lens is a concave spherical surface, and the light emergent surface of the fourth laser lens is a convex spherical surface; the light incident surface of the laser fifth lens is a concave spherical surface, and the light emergent surface of the laser fifth lens is a convex spherical surface; the light incident surface of the laser sixth lens is a convex spherical surface, and the light emergent surface of the laser sixth lens is a convex spherical surface; the light incident surface of the seventh laser lens is a concave spherical surface, and the light emergent surface of the seventh laser lens is a concave spherical surface.
Preferably, infrared mirror group includes infrared first lens, infrared second lens, infrared third lens, infrared fourth lens and infrared detector, infrared laser mixed light is infrared to infrared first lens through sharing mirror group colour separation reflection, passes through in proper order again infrared second lens, infrared third lens and infrared fourth lens focus formation of image on the infrared detector.
Preferably, the infrared detector is a refrigeration type detector and comprises an infrared detector window, an infrared detector optical filter and an infrared detector focal plane array; the infrared detector window, the infrared detector optical filter and the infrared detector focal plane array are sequentially connected; and the infrared fourth lens focuses and images a phase plane on the focal plane array of the infrared detector sequentially through the infrared detector window and the infrared detector optical filter.
Preferably, the light incident surface of the infrared first lens is a convex spherical surface, and the light emergent surface is a convex spherical surface; the light incident surface of the infrared second lens is a concave aspheric surface, and the light emergent surface of the infrared second lens is a convex spherical surface; the light incident surface of the infrared third lens is a convex spherical surface, and the light emergent surface of the infrared third lens is a concave spherical surface; the light incident surface of the infrared fourth lens is a convex spherical surface, and the light emergent surface of the infrared fourth lens is a concave spherical surface.
The invention has the beneficial effects that: according to the infrared and laser receiving common-aperture composite detection system, the infrared laser mixed light is subjected to color separation in a convergence light path through the common lens group, infrared is reflected, laser is transmitted, oblique aberration caused by the use of parallel flat plates is avoided in the light path, the aberration is corrected through the laser lens group by the transmitted laser, the aberration is corrected through the infrared lens group by the reflected infrared, and the imaging quality is good; the system has flexible and compact structure; the effect of inhibiting veiling glare is good.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an infrared and laser receiving common-aperture composite detection system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a stray light suppressing structure of a laser mirror assembly of the infrared and laser receiving common-aperture composite detection system according to the embodiment of the present invention;
FIG. 3 is a MTF curve of the infrared in the middle wave band of the infrared and laser receiving common-aperture composite detection system according to the embodiment of the present invention;
fig. 4 is a graph of MTF at 1064nm of laser of the infrared and laser receiving common-aperture composite detection system according to the embodiment of the present invention.
Reference numerals
1 shared lens group 2 laser lens group
3 infrared lens group 11 primary mirror
12-order mirror 21 laser first lens
22 laser second lens 23 laser third lens
24 laser first folding mirror 25 aperture diaphragm
26 laser second folding mirror 27 laser fourth lens
28 laser narrow-band filter 29 laser fifth lens
210 laser sixth lens 211 laser seventh lens
31 infrared first lens 32 infrared second lens
33 infrared third lens 34 infrared fourth lens
35 infrared detector window 36 infrared detector filter
37 infrared detector focal plane array 212 laser detector
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
Referring to fig. 1 and fig. 2, an embodiment of the invention provides an infrared and laser receiving common-aperture composite detection system, which includes a common lens group 1, a laser lens group 2 and an infrared lens group 3; the shared lens group 1, the laser lens group 2 and the infrared lens group 3 are arranged on the same optical axis; the shared lens group 1 is used for separating colors of the infrared laser mixed light in a convergence light path; color separation is performed on the transmitted laser and the reflected infrared; the laser lens group 2 is arranged at the end side of the transmission of the shared lens group 1 and is used for imaging the transmitted laser; the infrared lens group 3 is arranged at the end side reflected by the common lens group 1 and is used for imaging infrared rays. The mixed infrared laser light is subjected to color separation in a convergent light path through the shared lens group 1, infrared is reflected, laser is transmitted, oblique aberration caused by the use of parallel flat plates is avoided in the light path, the transmitted laser corrects aberration through the laser lens group 2, the reflected infrared corrects aberration through the infrared lens group 3, and imaging quality is good; the system has flexible and compact structure; the effect of inhibiting veiling glare is good.
The infrared and laser receiving common-caliber composite detection optical system of the embodiment adopts a coaxial catadioptric system configuration. The system includes sharing group 1, laser group 2 and 3 three parts of infrared group, and all optical element arrange on same optical axis, and wherein, sharing group 1 includes: a primary mirror 11 and a secondary mirror 12; the laser receiving lens group comprises: the laser mirror group 2 includes: the laser system comprises a laser first lens 21, a laser second lens 22, a laser third lens 23, a laser first folding mirror 24, a laser second folding mirror 26, a laser fourth lens 27, a laser narrowband filter 28, a laser fifth lens 29, a laser sixth lens 210, a laser seventh lens 211 and a laser detector 212; the infrared lens group 3 includes: an infrared first lens 31, an infrared second lens 32, an infrared third lens 33, an infrared fourth lens 34, and an infrared detector.
The infrared and laser receiving common-caliber composite system main system adopts a common-primary and secondary reflector scheme, and a main mirror 11 is used for converging mixed light; the secondary mirror 12 performs color separation in the convergent light path, reflects medium-wave infrared, and transmits laser. The imaging process of the laser lens group 2 and the infrared lens group 3 is as follows:
the imaging process of the infrared lens group 3 is as follows: after infrared radiation of a target at medium waves reaches the primary mirror 11, the infrared radiation is converged by the primary mirror 11 and then subjected to color separation at the secondary mirror 12, the infrared radiation is reflected by the secondary mirror 12 to form an infrared first image surface, the target on the infrared first image surface is subjected to image transfer by the infrared lens group 3 comprising the infrared first lens 31, the infrared second lens 32, the infrared third lens 33 and the infrared fourth lens 34 to form a second image surface, the target is focused on an infrared detector focal plane of the imaging receiver through a focal plane infrared detector window 35 and an infrared detector optical filter 36, and an imaging infrared detector focal plane array 37 is superposed with the infrared second image surface.
The imaging process of the laser lens group 2 is as follows: after laser radiation reaches the primary mirror 11, the laser radiation is converged by the primary mirror 11 and then subjected to color separation at the secondary mirror 12, a first laser image surface is formed by penetrating through the secondary mirror 12 and the first laser lens 21, and light is converted by the first laser lens 21, the second laser lens 22 and the first laser turning mirror 24 to form a second laser image surface; and then the target on the second image plane of the laser is transferred and focused on a laser detector 212 through a laser second folding mirror 26, a laser fourth lens 27, a laser narrow-band filter 28, a laser fifth lens 29, a laser sixth lens 210 and a laser seventh lens 211.
In the shared lens group 1, the reflecting surface of the primary mirror 11 and the reflecting surface of the secondary mirror 12 are arranged oppositely. The primary mirror 11 is a concave aspheric mirror, the material of the primary mirror 11 may be aluminum, silicon carbide, beryllium aluminum, microcrystalline glass, etc., and the reflecting surface of the primary mirror 11 is a standard quadric surface or a high-order aspheric surface. The secondary mirror 12 is a quadric dichroic mirror, which can be made of optical materials such as silicon, quartz, K9 glass and the like which can transmit laser, and is coated with a laser-transmitting infrared-reflecting film, the infrared reflectivity is better than 96%, and the transmittance is better than 93%.
In the infrared receiving lens system, an infrared first lens 31, an infrared second lens 32, an infrared third lens 33 and an infrared fourth lens 34 are sequentially disposed along the same optical axis. The first lens is made of a Si-based crystal material, the front surface (light incident surface) is a convex spherical surface, and the rear surface (light emergent surface) is a convex spherical surface; the second lens is made of Ge crystal-based materials, the front surface of the second lens is a concave aspheric surface, and the rear surface of the second lens is a convex spherical surface; the third lens is based on a Si crystal material, and the front surface of the third lens is a convex spherical surface while the rear surface is a concave spherical surface; the fourth lens is based on a Si crystal material, and the front surface of the fourth lens is a convex spherical surface, and the rear surface of the fourth lens is a concave spherical surface. The infrared detector is a refrigeration type detector and comprises a window, an optical filter and a focal plane array, wherein the window is based on infrared transmission materials such as germanium, ZnSe, ZnS and the like; the filter is placed between the window and the focal plane array as a cold stop, determines a solid angle of the focal plane array for receiving target radiation, and inhibits stray light reaching the focal plane array, and meanwhile, the cold stop is used as an exit pupil of the optical system, and an entrance pupil of an object space and the conjugate of the object space are superposed with the main mirror 11 as much as possible, so that the aperture of the main mirror 11 is effectively reduced.
In the laser receiving lens system, a first laser lens 21, a second laser lens 22 and a third laser lens 23 are sequentially arranged along the same optical axis, and then a fourth laser lens, a narrow-band laser filter 28, a fifth laser lens 29, a sixth laser lens 210 and a seventh laser lens 211 are reversely coiled and folded above the primary mirror 11 through a first laser turning mirror 24 and a second laser turning mirror 26. The first lens of the laser group is based on a ZF6 crystal material, the front surface is a convex spherical surface, and the rear surface is a concave spherical surface; the second lens of the laser group is based on an LAK52 crystal material, the front surface of the second lens is a concave spherical surface, and the rear surface of the second lens is a convex spherical surface; the third lens of the laser group is based on an LAK52 crystal material, the front surface is a convex spherical surface, and the rear surface is a convex spherical surface; the fourth lens of the laser group is based on ZF6 crystal material, the front surface is a concave spherical surface, and the rear surface is a convex spherical surface; the fifth lens of the laser group is based on K9 crystal material, the front surface is a concave spherical surface, and the rear surface is a convex spherical surface; the sixth lens of the laser group is based on a ZK10 crystal material, the front surface of the sixth lens is a convex spherical surface, and the rear surface of the sixth lens is a convex spherical surface; the seventh lens of the laser group is based on ZF6 crystal material, the front surface is a concave spherical surface, and the back surface is a concave spherical surface.
Other materials or kinds of lenses can be used for the primary mirror 11, the secondary mirror 12, the infrared first lens 31, the infrared second lens 32 to the fourth lens, the laser first lens 21, the laser second lens 22 to the seventh lens.
In addition, in the laser receiving lens system, an aperture diaphragm 25 is arranged at the second laser image surface to suppress stray light outside the field of view, and a narrow-band filter is arranged at the fourth lens of the laser group to suppress stray light outside the spectral band.
The optical system can realize laser and infrared common-caliber detection, and the imaging quality is good; the arrangement mode can greatly save space, shorten the total length of the system and enable the system to have flexible and compact configuration while realizing excellent performance; the effect of inhibiting veiling glare is good.
The Modulation Transfer Function is adopted to evaluate the image quality condition of the infrared and laser receiving common-caliber composite detection optical system. Fig. 3 is an MTF curve in the mid-wave band in the infrared receiving system of the common-aperture composite detection optical system. FIG. 4 is a graph of MTF at 1064nm of the laser of the common-aperture composite detection optical system. Wherein the meaning of the parameters is: limit "is the" diffraction limit "; "T" is the meridian plane; "R" is the "sagittal plane"; "spatial frequency (ctcles/mm)" is "spatial frequency (period/mm)"; "modulation" is a "modulus". As can be seen from fig. 3 and 4, the image quality in the medium wave and the laser wave bands is close to the diffraction limit by the common-aperture composite detection optical system.
Wherein, the technical indexes of the infrared system are as follows: focal Length (EFL): 560 mm; entrance pupil diameter: phi is 280 mm; field of view (FOV): 1.57 ° × 1.26 °; spectral range (Δ λ): 3.7um to 4.8 um; optical transfer function: the MTF of the edge field is more than 0.60 when the medium wave infrared is 3.7-4.8 mu m and the space frequency is 21 lp/mm.
The technical indexes of the laser receiving system are as follows: focal Length (EFL): 700 mm; entrance pupil diameter: phi is 280 mm; receive field of view (FOV): >0.28 mrad; a laser wavelength λ; 1064 nm.
The infrared and laser receiving common-caliber composite detection optical system can realize laser and infrared common-caliber detection and has good imaging quality; by optimizing optical materials and reasonably optimizing a system, the design of a laser and infrared common-caliber detection system is realized, the imaging quality is close to the diffraction limit, and the performance is stable; the system is flexible and compact in configuration, adopts a scheme of sharing a primary reflector and a secondary reflector, utilizes the secondary reflector to carry out color separation in a convergence light path, reflects medium wave infrared and transmits laser, and the infrared lens group only uses four lenses to realize medium wave imaging, so that the lenses are compact in interval; two folding mirrors are utilized in the laser lens group to fold the rear end optical path disc above the main mirror, so that the total length of the system can be greatly shortened under the condition of not influencing the image quality; the stray light suppression effect is good, in the laser receiving lens system, an aperture diaphragm is arranged on the second laser image surface, the light path from the aperture diaphragm to the laser receiving image surface is completely closed so as to suppress stray light outside a field of view, and a narrow-band filter is arranged on the fourth lens of the laser receiving lens system so as to suppress stray light outside a spectrum band.
The embodiment of the invention can carry out sequence adjustment, combination and deletion according to actual needs.
The embodiments describe the present invention in detail, and the specific embodiments are applied to explain the structural principle and the implementation of the present invention, and the above embodiments are only used to help understand the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. The utility model provides an infrared and laser receiving are compound detecting system of bore altogether which characterized in that: comprises a shared lens group, a laser lens group and an infrared lens group;
the shared lens group, the laser lens group and the infrared lens group are arranged on the same optical axis;
the shared mirror group is used for separating colors of the infrared laser mixed light in a convergence light path; the color separation is to transmit laser and reflect infrared;
the laser mirror group is arranged at the end side of the transmission of the common mirror group and is used for imaging the transmitted laser;
the infrared mirror group is arranged at the end side reflected by the common mirror group and is used for imaging infrared rays.
2. The infrared and laser receiving common-caliber composite detection system according to claim 1, characterized in that: the shared mirror group comprises a primary mirror and a secondary mirror, the primary mirror collects infrared laser mixed light to the end face of the secondary mirror, and the secondary mirror divides the collected infrared laser mixed light into transmitted laser and reflected infrared.
3. The infrared and laser receiving common-caliber composite detection system according to claim 2, characterized in that: the primary mirror is a concave aspheric surface reflector; the reflecting surface of the primary mirror is a standard quadric surface or a high-order aspheric surface; the primary mirror is made of one of aluminum, silicon carbide, beryllium aluminum and microcrystalline glass.
4. The infrared and laser receiving common-caliber composite detection system according to claim 2, characterized in that: the secondary mirror is a quadric dichroic mirror; the secondary mirror is made of one of silicon, quartz and K9 glass; the secondary mirror is plated with a laser-transmitting infrared-reflecting film.
5. The infrared and laser receiving common-caliber composite detection system according to any one of claims 1 to 4, characterized in that: laser mirror group includes first lens of laser, laser second lens, laser third lens, the first mirror that changes of laser, the second mirror that changes of laser, laser fourth lens, laser fifth lens, laser sixth lens, laser seventh lens and laser detector, the mixed light of infrared laser is through sharing mirror group colour separation transmission laser to the first lens of laser, passes through in proper order again laser second lens, laser third lens, the first mirror that changes of laser, the second mirror that changes of laser, laser fourth lens, laser fifth lens, laser sixth lens and laser seventh lens of turning over of laser second lens, laser third lens, the first mirror that changes of laser, laser second focus formation of image on the laser detector.
6. The infrared and laser receiving common-caliber composite detection system according to claim 5, characterized in that: the laser lens group also comprises a small-hole diaphragm and a laser narrow-band filter; the pinhole diaphragm is arranged between the laser first folding mirror and the laser second folding mirror; the laser narrowband filter is arranged between the laser fourth lens and the laser fifth lens.
7. The infrared and laser receiving common-caliber composite detection system according to claim 5, characterized in that: the light incident surface of the first laser lens is a convex spherical surface, and the light emergent surface of the first laser lens is a concave spherical surface; the light incident surface of the laser second lens is a concave spherical surface, and the light emergent surface of the laser second lens is a convex spherical surface; the light incident surface of the laser third lens is a convex spherical surface, and the light emergent surface of the laser third lens is a convex spherical surface; the light incident surface of the fourth laser lens is a concave spherical surface, and the light emergent surface of the fourth laser lens is a convex spherical surface; the light incident surface of the laser fifth lens is a concave spherical surface, and the light emergent surface of the laser fifth lens is a convex spherical surface; the light incident surface of the laser sixth lens is a convex spherical surface, and the light emergent surface of the laser sixth lens is a convex spherical surface; the light incident surface of the seventh laser lens is a concave spherical surface, and the light emergent surface of the seventh laser lens is a concave spherical surface.
8. The infrared and laser receiving common-caliber composite detection system according to any one of claims 1 to 4, characterized in that: infrared mirror group includes infrared first lens, infrared second lens, infrared third lens, infrared fourth lens and infrared detector, infrared laser mixed light is infrared to infrared first lens through sharing mirror group colour separation reflection, passes through in proper order again infrared second lens, infrared third lens and infrared fourth lens focus formation of image on the infrared detector.
9. The infrared and laser receiving common-caliber composite detection system according to claim 8, characterized in that: the infrared detector is a refrigeration type detector and comprises an infrared detector window, an infrared detector optical filter and an infrared detector focal plane array; the infrared detector window, the infrared detector optical filter and the infrared detector focal plane array are sequentially connected; and the infrared fourth lens focuses and images a phase plane on the focal plane array of the infrared detector sequentially through the infrared detector window and the infrared detector optical filter.
10. The infrared and laser receiving common-caliber composite detection system according to claim 8, characterized in that: the light incident surface of the infrared first lens is a convex spherical surface, and the light emergent surface of the infrared first lens is a convex spherical surface; the light incident surface of the infrared second lens is a concave aspheric surface, and the light emergent surface of the infrared second lens is a convex spherical surface; the light incident surface of the infrared third lens is a convex spherical surface, and the light emergent surface of the infrared third lens is a concave spherical surface; the light incident surface of the infrared fourth lens is a convex spherical surface, and the light emergent surface of the infrared fourth lens is a concave spherical surface.
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| CN112068311A (en) * | 2020-09-08 | 2020-12-11 | 西安应用光学研究所 | Infrared, laser and millimeter wave common-caliber three-mode seeker optical system |
| CN112946907A (en) * | 2021-01-29 | 2021-06-11 | 中国科学院长春光学精密机械与物理研究所 | Large-view-field visible-infrared integrated compact optical camera |
| CN116859401A (en) * | 2022-01-29 | 2023-10-10 | 西安工业大学 | Infrared and laser common-caliber composite detection device |
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