CN203658669U - Flexible multiband infrared optical system - Google Patents

Abstract

The utility model provides a flexible multiband infrared optical system, belongs to infrared optical systems, and solves the problems of an existing dual-band optical system that the spectrometry band is narrow, the optical path layout is limited, the size is large, and the weight is heavy. The flexible multiband infrared optical system comprises an infrared scanning mirror, a multiband infrared lens, an optical path switching device, an optical path switching controller, an FPA interface and an optical fiber interface. The infrared scanning mirror is capable of reflecting 2-14 [miu]m infrared light in different directions so as to enable the infrared light to be incident to the multiband infrared lens. The multiband infrared lens carries out focusing on the incident infrared light. The optical path switching device is arranged behind the multiband infrared lens, and by adopting a moving or rotating structure mode, the optical path switching device is capable of carrying out light splitting or time-sharing modulation on the focused infrared light. The flexible multiband infrared optical system is small in size, high in integration, convenient to use and flexible; in addition, the flexible multiband infrared optical system can be integrated with an automatic target identification system based on infrared images and spectrum correlation, thereby realizing view field scanning and automatic identification and tracking, and being applied to infrared remote sensing detection.

Description

A Multiband Smart Infrared Optical System

technical field

The utility model belongs to the field of infrared remote sensing optics, and more specifically relates to a multi-band smart infrared optical system.

Background technique

In recent years, the optical remote sensing detection technology has achieved rapid development, and various optical remote sensing devices have emerged as the times require, and their technical performance has also been improved and perfected. The automatic target recognition system of infrared image and spectral correlation is one of them. As an important component of the automatic target recognition system associated with infrared images and spectra, it plays an important role in improving the detection range and recognition ability of the system. With the rapid development of remote sensing detection technology, simultaneous spectral detection of radiation in two bands has become very important, and the corresponding optical system and its design requirements have grown unprecedentedly. However, the infrared dual-band optical system is quite difficult to design. Due to domestic limitations in infrared materials, processing capabilities, coating technology, etc., especially on the basis of not using special components and materials The two bands of long-wave infrared wave need to correct various aberrations at the same time. Moreover, since most military optical systems work in a relatively harsh ambient temperature range, the infrared optical material has a large temperature coefficient of refraction index, and changes in ambient temperature will cause thermal defocusing of the infrared optical system and result in a decrease in image quality. It is very difficult to achieve full refraction passive athermalization of the lens.

The multi-infrared optical lens disclosed in the prior art has a Chinese utility model patent (patent name: dual-band infrared optical system) with the patent number ZL200910272921.2 authorized in 2011. The infrared optical lens disclosed in the patent is a dual-band (medium wave and Long wave) is actually assembled by two lenses of medium wave and long wave. The central axes of the two lenses intersect vertically. There is a 45° beam splitter in front of the two lenses. The beam splitter separates the incident medium wave and long wave infrared light. The infrared light of the two wavebands is respectively incident on the two lenses. Since the beam splitter is located in front of the lens, the aperture of the entire lens is relatively large, and because it is assembled with two lenses, the volume and weight of the entire lens is also relatively large.

The infrared optical lens involved in the Chinese utility model patent (patent name: a multi-band moving target spectral feature detection and recognition method and device) authorized in 2013 with the patent number ZL201110430969. Infrared light has only transmission and no reflection, so all long-wave infrared light entering the system is only used for imaging, not for spectrum formation, so the long-wave infrared spectral characteristics of the target cannot be obtained.

Utility model content

Aiming at the above defects or improvement needs of the prior art, the utility model provides a multi-band smart infrared optical system, the purpose of which is to solve the problem that the existing dual-band optical system cannot simultaneously form a spectrum of long-wave infrared light, the optical path layout is limited, and the volume and weight Big question. This solves the technical problems of the target automatic identification system based on infrared image and spectral correlation, such as narrow target spectrum identifiable band, low integration, low dexterity and portability.

The multi-band smart infrared optical system provided by the utility model includes an infrared scanning mirror, an infrared lens, a spectroscopic lens, an FPA interface and an optical fiber interface; the infrared scanning mirror is used to emit infrared incident light with a wavelength of 2-14um to the infrared lens , the infrared lens is used to focus the infrared incident light; the spectroscopic lens is used to divide the focused infrared light into two beams, and one beam of infrared light is output through the FPA interface, and provides an imaging light source for an external imaging device ; Another beam of infrared light is output through the optical fiber interface, and provides a spectral light source for the external spectrum measuring equipment.

The utility model provides a smart multi-band infrared optical system, which includes an infrared scanning mirror, an infrared lens, a reflector, an optical path switching device, an optical path switching controller, an FPA interface and an optical fiber interface; The infrared incident light of 2-14um is transmitted to the infrared lens, and the infrared lens is used to focus the infrared incident light; the reflective lens is installed on the optical path switching device, and the optical path switching device is aligned with the central axis of the infrared lens The included angle is set at 45°, the reflective lens moves under the control of the optical path switching controller and realizes the time-sharing switching of the optical path; in the first half cycle of the optical path switching, the focused 2-14um infrared light is output through the FPA interface, Provide imaging light source for external imaging equipment; in the second half cycle of optical path switching, the focused 2-14um infrared light is reflected by the reflector and output through the optical fiber interface, providing spectrum for external spectrometry equipment light source.

The utility model provides a multi-band smart infrared optical system, which includes an infrared scanning mirror, an infrared lens, a spectroscopic mirror, a reflective mirror, a double mirror optical path switching device, an optical path switching controller, an FPA interface and an optical fiber interface; the infrared scanning mirror It is used to emit the infrared incident light with a wavelength of 2-14um to the infrared lens, and the infrared lens is used to focus the infrared incident light; the spectroscopic mirror and the reflective mirror are simultaneously arranged on the double mirror optical path switching device The double-mirror optical path switching device is set at an angle of 45° with the central axis of the infrared lens; under the control of the optical path switching controller, the spectroscopic work is realized by the spectroscopic lens, and the focused infrared light is captured by the spectroscopic The lens is divided into two beams, one beam of infrared light is output through the FPA interface to provide imaging light source for external imaging equipment; the other beam of infrared light is output through the optical fiber interface to provide spectral light source for external spectrum measuring equipment; Under the control of the switching controller, the reflective lens realizes time-sharing work, and in the first half cycle of optical path switching, the focused 2-14um infrared light is output through the FPA interface to provide imaging light source for the external imaging device; In the second half cycle of the optical path switching, the focused 2-14um infrared light is reflected by the reflector and output through the optical fiber interface, providing a spectral light source for the external spectrometer equipment.

Wherein, the infrared scanning mirror includes a two-dimensional turntable and a plane reflector arranged on the two-dimensional turntable; the two-dimensional turntable is a digital platform, and the two-dimensional turntable is used to drive the pitch movement or deflection of the plane reflector sports.

Wherein, the spectroscopic lens has a semi-transparent and semi-reactive effect on long-wave infrared light with a wavelength of 8-14um, and has a high-reaction effect on short-wave infrared light with a wavelength of 2-3um and medium-wave infrared light with a wavelength of 3-5um.

Wherein, the reflective mirror (31) has a reflectivity greater than 95% for short-wave infrared light with a wavelength of 2-3um, medium-wave infrared light with a wavelength of 3-5um, and long-wave infrared light with a wavelength of 8-14um.

The system of the utility model comprises an infrared scanning mirror, a multi-band infrared lens, an optical path switching device, an optical path switching controller, an FPA interface and an optical fiber interface. The infrared scanning mirror can reflect 2-14um infrared light in different directions to enter the multi-band infrared lens. The multi-band infrared lens focuses the incident infrared light. The optical path switching device is located behind the multi-band infrared lens, adopts a moving or rotating structure, and can perform spectral or time-division modulation on the focused infrared light.

Generally speaking, compared with the prior art, the above technical solutions conceived by the utility model, as an infrared optical component of an automatic target recognition system based on infrared image and spectral correlation, due to the use of scanning mirrors, the automatic target recognition system can Scan and search for targets in the field of view and track them; due to the semi-transparent and semi-reactive effect of the spectroscope on long-wave infrared light, the long-wave infrared can be imaged and spectrum-formed, which can broaden the spectral band of the original equipment; due to the light-splitting The design of the infrared path makes the infrared light of the short-wave, medium-wave and long-wave bands both imaging and spectroscopic; due to the optical path design of light splitting/time splitting, the infrared system is more powerful and has a wider range of applications. It is more flexible to use and is beneficial to the miniaturization, intelligence and portable design of the target automatic identification system. The structural form of the beam splitter and mirror placed behind the lens simplifies the lens structure and reduces the entrance pupil diameter of the system by more than half, thus greatly reducing the system volume and weight.

Description of drawings

Fig. 1 is a schematic structural view of the multi-band smart infrared optical system provided by the first embodiment of the present invention;

Fig. 2 is a schematic structural diagram of the infrared scanning mirror in the multi-band smart infrared optical system provided by the embodiment of the present invention;

Fig. 3 is a schematic diagram of the scanning range of the infrared scanning mirror provided by the embodiment of the present invention;

Fig. 4 is a schematic structural view of the multi-band smart infrared optical system provided by the second embodiment of the present invention;

Fig. 5 is a schematic diagram of the divided optical path of the multi-band smart infrared optical system provided by the second embodiment of the utility model; (a) reflected optical path; (b) straight-through optical path;

6 is a schematic diagram of the translational optical path switching method of the multi-band smart infrared optical system provided by the second embodiment of the utility model; (a) reflective work; (b) straight-through work;

Fig. 7 is a schematic diagram of the rotating optical path switching method of the multi-band smart infrared optical system provided by the second embodiment of the utility model; (a) reflective work; (b) straight-through work;

Fig. 8 is a schematic structural diagram of the multi-band smart infrared optical system provided by the third embodiment of the present invention;

Fig. 9 is the schematic diagram of the time-sharing and light-splitting optical path of the multi-band smart infrared optical system provided by the third embodiment of the utility model; ;

Fig. 10 is a schematic diagram of the translational optical path switching method of the multi-band smart infrared optical system provided by the third embodiment of the utility model; (a) light-splitting work; (b) time-sharing work--reflection; (c) time-sharing work-- straight through;

Fig. 11 is a schematic diagram of the rotating optical path switching method of the multi-band smart infrared optical system provided by the third embodiment of the utility model; (a) splitting work; (b) time-sharing work--reflection; (c) time-sharing work-- through

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute conflicts with each other.

The utility model belongs to an infrared remote sensing optical system, in particular to a multi-band infrared spectroscopic/time-sharing optical lens, which can be used as an infrared optical component of an automatic target recognition system based on infrared image and spectrum correlation. The special spectroscopic coating design enables the long-wave infrared to be imaged and formed into a spectrum, which can broaden the spectral band of the original equipment; the split optical path design enables the infrared light of the three bands of short-wave, medium-wave and long-wave to be imaged and formed. Spectrum; the design of light splitting and time-sharing combined into one makes this infrared system more powerful, with a wider range of applications and more flexible use. The structure placed behind the lens simplifies the structure of the lens without affecting the function of the lens, reducing the entrance pupil diameter of the system by more than half, thereby greatly reducing the volume and weight of the system.

In order to overcome the shortcomings of the existing infrared dual-band lens, such as narrow band, limited system optical path layout, and large volume and weight, and to improve the shortcomings of the existing map integration device that cannot simultaneously acquire the characteristics of the target's mid- and long-wave infrared spectra, the utility model provides a A multi-band smart infrared spectroscopic/time-sharing optical system includes an infrared scanning mirror, an infrared lens, an optical path switching device, and an optical path switching controller. The infrared lens focuses on short-wave infrared light (2-3um), medium-wave infrared light (3-5um), and long-wave infrared light (8-14um). The optical path switching device is located behind the multi-band infrared lens, and performs spectral or time-division modulation on the focused short, medium, and long-wave infrared light according to its working state. The working state of the optical path switching device can be selected intelligently or manually. When the optical path switching device works in the spectroscopic state, the 2-14um infrared light focused by the lens enters the spectroscopic sheet, 50% of the 8-14um infrared light passes through the spectroscopic sheet, and 2-5um and 50% of the 8-14um infrared light Reflected; when the optical path switching device works in a time-sharing state, the 2-14um infrared light focused by the lens passes directly or is completely reflected at a certain frequency. The splitting/time-sharing controller is connected with the host or other main control units via the serial port line.

Below in conjunction with accompanying drawing and example the utility model is further described.

As shown in Figure 1, it is a schematic structural diagram of a multi-band smart infrared optical system. A multi-band smart infrared optical system provided by the first embodiment of the utility model includes: an infrared scanning mirror 1, an infrared lens 2, a spectroscopic lens 30, an FPA ( Focal Plane Array (focal plane array) interface 5 and optical fiber interface 6; infrared scanning mirror 1 emits infrared incident light with a wavelength of 2-14um to infrared lens 2, and infrared lens 2 focuses infrared incident light; spectroscopic lens 30 will focus The final infrared light is divided into two beams, one beam of infrared light is output through the FPA interface 5, and provides an imaging light source for the external imaging device; the other beam of infrared light is output through the optical fiber interface 6, and provides a spectral light source for the external spectrum measuring equipment .

In this utility model embodiment, the structure of infrared scanning mirror 1 is shown in Figure 2, and infrared scanning mirror 1 includes two-dimensional turntable 11 and plane reflector 12; Two-dimensional turntable 11 is a high-precision digital platform with a maximum load capacity of 3kg , the position resolution is 0.0129°+0.00645°/step, and the maximum speed is 1000 steps/s; the two-dimensional turntable 11 can drive the plane mirror 12 to pitch or deflect by a certain angle θ(θ∈[-20°～+20°], by The position of the field of view required in practical applications is determined), so as to reflect the infrared light of different fields of view to the infrared lens 2. The schematic diagram of the motion range of the two-dimensional turntable 11 is shown in Figure 3, wherein Figure 3a shows the infrared scanning mirror 1 Fig. 3b shows the deflection scanning range of the infrared scanning mirror 1, and its motion range is set according to the field of view required by the specific application.

In the embodiment of the present utility model, the infrared lens 2 may adopt a transmissive structure, or may adopt a Cassegrain reflective structure. The conditions that the infrared lens 2 satisfies include: the working wavelength range is 2-14 μm, and the lens transmittance is over 70%. In the embodiment of the utility model, the design parameters of the infrared lens 2 need to meet the following requirements: the field of view angle is 5.75°×4.3° (controlling the rotation of the scanning mirror can expand the field of view angle of the entire system), the wave band is 2-14 μm, and the F number is 1.0. The focal length is about 57mm. Due to the wide band, the design of the infrared lens 2 needs to use a variety of infrared crystal materials to eliminate chromatic aberration, and at the same time add multiple aspheric surfaces to optimize the design of aberration. In order to reduce the spectral noise that may be generated by the long-wave infrared radiation of the lens itself, an athermalization design is required when designing the lens. In addition, the processing and coating of optical materials such as multi-spectral CVD ZnS and single crystal Ge required by the system also require special process design.

The dichroic lens 30 can adopt single crystal Ge glass coated with a dichroic coating. The spectroscopic lens 30 has a semi-transparent and semi-reactive effect on long-wave infrared light (infrared light with a wavelength of 8-14um), and has a semi-transparent and semi-reactive effect on short-wave infrared light (infrared light with a wavelength of 2-3um) and mid-wave infrared light (infrared light with a wavelength of 3-5um). light) are highly reactive.

The working principle of the multi-band smart infrared optical system provided by the embodiment of the utility model: the infrared scanning mirror 1 emits the infrared incident light with a wavelength of 2-14um to the infrared lens 2, and the infrared lens 2 focuses the infrared incident light; the spectroscopic lens 30 The focused infrared light is divided into two beams, which are output through the FPA interface 5 and the optical fiber interface 6 respectively. 50% of the infrared light with a wavelength of 8-14um in the focused infrared incident light passes through the spectroscopic lens 30 and is output through the interface 5, and provides an imaging light source for an external imaging device; the other 50% of the focused infrared incident light The infrared light with a wavelength of 8-14um and the infrared light with a wavelength of 2-5um are reflected by the spectroscopic lens 30, output through the optical fiber interface 6, and provide a spectrum-forming light source for an external spectrum measuring device.

The multi-band smart infrared optical system provided by the embodiment of the utility model is used as the infrared optical component of the automatic target recognition system based on infrared image and spectral correlation, which can broaden the spectral band of the automatic target recognition system, so that it can image long-wave infrared light It can also form a spectrum; enable the automatic target identification system to scan and search for targets in the field of view, track and measure them; it is also beneficial to the miniaturization and portable design of the automatic target identification system.

When the target automatic identification system needs to search, track, and identify targets with a relatively long distance (>5KM), since the infrared light incident on the multi-band smart infrared optical system is relatively weak, the multi-band smart infrared optical system provided by the first embodiment of the utility model is used. The target automatic identification system of the system cannot effectively track and identify the target, and the following spectroscopic technical scheme can be adopted; a multi-band smart infrared optical system provided by the second embodiment of the utility model, and Fig. 4 is a multi-band infrared optical system provided by the utility model embodiment A structural schematic diagram of a smart infrared optical system, including: an infrared scanning mirror 1 , an infrared lens 2 , a mirror 31 , an optical path switching device 32 , an optical path switching controller 4 , an FPA interface 5 and an optical fiber interface 6 .

The infrared scanning mirror 1 emits the infrared incident light with a wavelength of 2-14um to the infrared lens 2, and the infrared lens 2 focuses the infrared incident light; the 2-14um infrared light focused by the lens is directly Through or all reflected, the period T (0.2s～1s) of optical path switching is set according to the requirements of optical path switching in practical applications; in the first half cycle of optical path switching, the focused 2-14um infrared light is all output through FPA interface 5 , and provide imaging light source for external imaging equipment; in the second half cycle of optical path switching, the focused 2-14um infrared light is reflected by reflective lens 31 and output through optical fiber interface 6, and provides spectrum forming for external spectrometry equipment light source. Fig. 5 shows a schematic diagram of optical path switching of focused 2-14um infrared light, Fig. 5(a) is a schematic diagram of a reflected optical path, and Fig. 5(b) is a schematic diagram of a straight-through optical path.

In the embodiment of the utility model, the parameters and requirements of the infrared scanning mirror 1, the infrared lens 2, the FPA interface 5 and the fiber interface 6 are the same as those of the first utility model example.

Reflective lens 31 adopts K9 glass, and has very high reflectivity to infrared light of three bands of short wave (2-3um), medium wave (3-5um) and long wave (8-14um), which can reach more than 95%.

The reflective mirror 31 is installed on the optical path switching device 32 and forms an angle of 45° with the central axis of the lens 2. The optical path switching device 32 drives the reflective mirror 31 to move left and right under the control of the optical path switching controller 4 to realize time-sharing switching of the optical path. The optical path switching controller 4 is connected with a host computer or other main control units via a serial cable.

The working principle of the multi-band smart infrared optical system provided by the embodiment of the utility model: the infrared scanning mirror 1 emits the infrared incident light with a wavelength of 2-14um to the infrared lens 2, and the infrared lens 2 focuses the infrared incident light; The final 2-14um infrared light is output through the FPA interface 5 in the first half cycle of the optical path switching, and provides imaging light source for the external imaging device; the 2-14um infrared light focused by the lens is in the second half cycle of the optical path switching During the period, it is reflected and output through the optical fiber interface 6, and provides a spectral light source for the external spectrum measuring equipment.

The multi-band smart infrared optical system provided by the embodiment of the utility model is used as an infrared optical component of an automatic target identification system based on infrared images and spectral correlations, which can improve the target detection distance of the automatic target identification system; enables the automatic target identification system to scan and search for visual Targets in the field, track and measure them; it is also beneficial to the miniaturization and portable design of the automatic target identification system.

The optical path switching device 32 can adopt a movable or rotating structure. The mobile optical path switching device 32 is mainly composed of a guide rail and a mirror frame. The mirror frame is used to fix the reflector 31, and the mirror frame can move on the guide rail. FIG. 6 is Its structure diagram.

The optical path switching controller 4 includes a motor and a control circuit, and the motor drives the mirror frame to move under the control of the control circuit, thereby driving the mirror 31 . The motor is connected with the mirror frame through a mechanical transmission mechanism, such as belt transmission, gear transmission and the like.

The reflector 31 moves left and right according to the cycle T (0.2s-1s, can be programmed) under the control of the optical path switching controller 4. In the first half cycle, the reflector moves until the optical axis passes through its center and forms a 45° angle with its surface. ° included angle, as shown in Figure 6(a). In the second half cycle, the reflector moves to the right, so that there is a light pass-through area with the same diameter as the reflector on the left. As shown in Figure 6(b).

The structure of the rotary optical path switching device 32 is shown in FIG. 7 , including a rotating mirror frame. The rotating mirror frame is connected to the motor through a gear transmission mechanism. The rotating mirror frame is used to fix the mirror 31 and drive the mirror 31 to rotate.

The reflector 31 rotates left and right according to the cycle T (0.2s-1s, can be set by program) under the control of the optical path switching controller. In the first half cycle, the reflector rotates until the optical axis passes through its center and forms a 45° angle with its surface Angle, as shown in Figure 7(a). In the second half cycle, the reflector 31 is rotated and cut out, so that there is a straight-through area on the left side of which the diameter is about the same as that of the reflector. As shown in Figure 7(b).

When light splitting and light splitting paths are required in the same working process, the following technical solutions can be adopted; a multi-band smart infrared optical system provided by the third embodiment of the utility model, Figure 8 is provided by the embodiment of the utility model Schematic diagram of the structure of a multi-band smart infrared optical system, including: an infrared scanning mirror 1, an infrared lens 2, a spectroscopic mirror 30, a reflecting mirror 31, a double mirror optical path switching device 33, an optical path switching controller 4, an FPA interface 5 and an optical fiber interface 6; The double-mirror optical path switching device 33 is equipped with a spectroscopic lens 30 and a reflective lens 31 at the same time. Under the control of the optical path switching controller 4, the spectroscopic lens 30 and the reflective lens 31 are driven to realize the required optical path. Optical path, when the distance is long (>5km), the split optical path is used.

Figure 9 is a schematic diagram of the split optical path and the split optical path. During time-sharing operation, the 2-14um infrared light focused by the lens passes directly or is completely reflected at a certain frequency (1-5Hz); in the first half cycle of the optical path switching Inside, the focused 2-14um infrared light is all output through the FPA interface 5, and provides an imaging light source for the external imaging device, as shown in Figure 9(a); in the second half period of the optical path switching, the focused 2 The -14um infrared light is reflected by the reflector 31 and output through the optical fiber interface 6, and provides a spectral light source for the external spectrum measuring equipment, as shown in FIG. 9(b). During spectroscopic work, the spectroscopic lens 30 divides the focused infrared light into two beams, one beam of infrared light is output through the FPA interface 5, and provides an imaging light source for an external imaging device; the other beam of infrared light is output through the optical fiber interface 6, and provides The external spectrometer equipment provides a spectral light source, as shown in Fig. 9(c).

The working principle of the multi-band smart infrared optical system provided by the embodiment of the utility model: when working in a time-sharing manner, the infrared scanning mirror 1 emits the infrared incident light with a wavelength of 2-14um to the infrared lens 2, and the infrared lens 2 conducts the infrared incident light Focusing; the 2-14um infrared light focused by the lens passes directly or is completely reflected at a certain frequency (1-5Hz), and the period T (0.2s-1s) of optical path switching is set according to the requirements of optical path switching in practical applications; In the first half cycle of optical path switching, the focused 2-14um infrared light is output through FPA interface 5, and provides imaging light source for external imaging equipment; in the second half cycle of optical path switching, the focused 2-14um infrared light The light is reflected by the reflector 31 and output through the optical fiber interface 6, and provides a spectrum-forming light source for an external spectrum measuring device. When the spectroscopic work is performed, the infrared scanning mirror 1 transmits the infrared incident light with a wavelength of 2-14um to the infrared lens 2, and the infrared lens 2 focuses the infrared incident light; the spectroscopic lens 30 divides the focused infrared light into two beams, which pass through the FPA respectively The interface 5 and the optical fiber interface 6 are output; 50% of the focused infrared incident light with a wavelength of 8-14um is transmitted through the spectroscopic lens 30, output through the interface 5, and provides an imaging light source for the external imaging device; the focused Another 50% of the infrared light with a wavelength of 8-14 um and infrared light with a wavelength of 2-5 um in the incident infrared light is reflected by the spectroscopic lens 30 and output through the optical fiber interface 6 to provide a spectral light source for external spectrometry equipment.

The multi-band smart infrared optical system provided by the embodiment of the utility model effectively combines the multi-band smart infrared optical system provided by the first embodiment and the second embodiment, and serves as an infrared optical component of an automatic target identification system based on infrared image and spectral correlation , in the same working process, the optical path can be intelligently selected according to specific needs, which is beneficial to the intelligent design of the automatic target recognition system.

The dual-mirror optical path switching device 33 can adopt a movable structure or a rotating structure. FIG. 10 is a schematic diagram of the mobile structure of the dual-lens optical path switching device 33 . The double-mirror optical path switching device 33 is equipped with a reflective mirror and a dichroic mirror at the same time. When the beam splitter works, 30 beam splitters are translated and cut in, and the optical axis passes through its center and forms an angle of 45° with its surface, as shown in Figure 10(a). When working in time-sharing mode, the reflector moves left and right according to a certain period T (0.2s～1s, can be set by program) under the control of the optical path switching controller. In the first half period, the reflector 31 moves until the optical axis passes through it. center and form an angle of 45° with its surface, as shown in Figure 10(b). In the latter half cycle, the reflecting mirror 31 moves to the right, so that there is a light pass-through area with approximately the same diameter as the reflecting mirror on the left side. As shown in Figure 10(c).

FIG. 11 is a schematic diagram of the rotation structure of the double-mirror optical path switching device 33 . During spectroscopic work, the spectroscopic lens 30 rotates and cuts in, and the optical axis passes through its center and forms an included angle of 45° with its surface, as shown in FIG. 11( a ). When working in time-sharing, the mirror 31 rotates left and right according to a certain cycle T (0.2-1s, which can be set by program) under the control of the optical path switching controller. In the first half cycle, the mirror rotates until the optical axis passes through its center And form an angle of 45° with its surface, as shown in Figure 11(b). During the second half of the cycle, the mirror is rotated and cut out so that there is a pass-through area on the left with approximately the same diameter as the mirror. As shown in Figure 11(c).

Those skilled in the art can easily understand that the above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and modifications made within the spirit and principles of the utility model Improvements and the like should all be included within the protection scope of the present utility model.

Claims (6)

1. the dexterous infrared optical system of multiband, is characterized in that, comprises infrared scan mirror (1), infrared lens (2), light splitting eyeglass (30), FPA interface (5) and optical fiber interface (6);

Described infrared scan mirror (1) is emitted to infrared lens (2) for the infrared incident light that is 2-14um by wavelength, and described infrared lens (2) is for focusing on infrared incident light; Described light splitting eyeglass (30) is for the infrared light after focusing on is divided into two bundles, and a branch of infrared light is by described FPA interface (5) output, and provides imaging source for outside imaging device; Another bundle infrared light is exported by described optical fiber interface (6), and is provided as spectrum light source for outside survey spectrum equipment.

2. the dexterous infrared optical system of multiband, it is characterized in that, comprise infrared scan mirror (1), infrared lens (2), reflecting optics (31), light path switching device (32), light path switch controller (4), FPA interface (5) and optical fiber interface (6);

Described infrared scan mirror (1) is emitted to infrared lens (2) for the infrared incident light that is 2-14um by wavelength, and infrared lens (2) is for focusing on infrared incident light; Described reflecting optics (31) is arranged on described light path switching device (32), the central axis angle setting at 45 ° of described light path switching device (32) and described infrared lens (2), described reflecting optics (31) moves and realizes light path timesharing and switches under the control of light path switch controller (4);

In the front half period of switching in light path, the 2-14um infrared light after focusing is by described FPA interface (5) output, for outside imaging device provides imaging source; In the rear half period of switching in light path, the 2-14um infrared light after focusing is reflected by described reflecting optics (31) and passes through described optical fiber interface (6) output, for outside survey spectrum equipment is provided as spectrum light source.

3. the dexterous infrared optical system of multiband, it is characterized in that, comprise infrared scan mirror (1), infrared lens (2), light splitting eyeglass (30), reflecting optics (31), two lens light path switching device (33), light path switch controller (4), FPA interface (5) and optical fiber interface (6);

Described infrared scan mirror (1) is emitted to infrared lens (2) for the infrared incident light that is 2-14um by wavelength, and described infrared lens (2) is for focusing on infrared incident light;

Described light splitting eyeglass (30) and described reflecting optics (31) are arranged on described two lens light path switching device (33) simultaneously; The central axis angle setting at 45 ° of described two lens light path switching device (33) and described infrared lens (2); Under the control of light path switch controller (4), realize light splitting work by described light splitting eyeglass (30), infrared light after focusing is divided into two bundles by described light splitting eyeglass (30), a branch of infrared light is by described FPA interface (5) output, for outside imaging device provides imaging source; Another bundle infrared light is by described optical fiber interface (6) output, for outside survey spectrum equipment is provided as spectrum light source;

Under the control of light path switch controller (4), realize time-sharing work by described reflecting optics (31), in the front half period of switching in light path, 2-14um infrared light after focusing is by described FPA interface (5) output, for outside imaging device provides imaging source; In the rear half period of switching in light path, the 2-14um infrared light after focusing is reflected by described reflecting optics (31) and passes through described optical fiber interface (6) output, for outside survey spectrum equipment is provided as spectrum light source.

4. the dexterous infrared optical system of multiband as described in claim 1-3 any one, is characterized in that, infrared scan mirror (1) comprises two-dimentional turntable (11) and is arranged on the plane mirror (12) on described two-dimentional turntable; Described two-dimentional turntable (11) is digital tripod head, and described two-dimentional turntable (11) is for driving (12) luffing of described plane mirror or yaw motion.

5. the dexterous infrared optical system of multiband as described in claim 1 or 3, it is characterized in that, the LONG WAVE INFRARED light that described light splitting eyeglass (30) is 8-14um to wavelength has semi-transparent semi-reflecting effect, and the medium-wave infrared light that the short-wave infrared light that is 2-3um to wavelength and wavelength are 3-5um has high retroaction.

6. the dexterous infrared optical system of multiband as described in claim 2 or 3, it is characterized in that, the reflectivity of the LONG WAVE INFRARED that the short-wave infrared light that described reflecting optics (31) is 2-3um to wavelength, the medium-wave infrared light that wavelength is 3-5um and wavelength are 8-14um is greater than 95%.

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