CN109884790B - Multifunctional infrared optical imaging system - Google Patents
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Abstract
The invention discloses a multifunctional infrared optical imaging system, which consists of an optical window, an object space field scanning reflector, a first caliber adjusting device, an optical despinning device, a second caliber adjusting device, an optical multi-path system, a reverse scanning mirror, a rear sub-imaging system and an area array infrared detector and is used for realizing regional scanning imaging of system pitching and direction. The invention realizes the design of a multifunctional infrared optical system by integrating components such as an optical despin device, an optical multi-path system, a reverse scanning mirror and the like in the infrared optical system, and simultaneously ensures that the interior of the infrared system has three-dimensional angular motion compensation capability.
Description
Technical Field
The invention belongs to the field of optics, and particularly relates to an infrared optical imaging system for realizing multiple functions.
Background
The warning search optical system is used for radiating infrared of a background and a target, aiming at the problems that the existing infrared warning equipment usually adopts a mechanical external scanning mode, has field-of-view shielding, short integration time of a linear array sensor and the like, in order to improve the scanning speed of the system, an integral azimuth rotation scheme is not adopted, and the two-dimensional scanning of the object field of the warning search equipment is realized by adopting the quick scanning of a reflector; in order to further improve the detection performance of the shipborne photoelectric warning equipment on glancing sea anti-ship missiles, particularly supersonic speed anti-ship missiles, and to improve the acting distance of the system, the warning search optical system adopts a plane array detector to stare and image instead of a linear array detector.
The existing infrared warning equipment is generally large in size, low in scanning speed, short in integration time of a linear array detector and limited in system action distance.
Disclosure of Invention
Aiming at the defects of the existing infrared warning equipment, the invention provides a multifunctional infrared optical imaging system, which realizes the design of the multifunctional infrared optical system by integrating components such as an optical despin device, an optical multi-path system, a reverse scanning mirror and the like in the infrared optical system and simultaneously enables the interior of the infrared system to have three-dimensional angular motion compensation capability.
The technical scheme adopted by the invention for solving the technical problems is as follows: a multifunctional infrared optical imaging system is sequentially provided with an optical window, an object space view field scanning reflector, a first aperture adjusting device, a second aperture adjusting device, a rear sub-imaging system and an area array infrared detector from an object space to an image space; the optical window mask is arranged on the outer side of the object space field scanning reflector; the object space view field scanning reflector is positioned on the inner side of the optical window, consists of a first reflector and a second reflector, and can rotate around a rotating shaft to perform object space view field scanning; the first aperture adjusting device comprises a first objective lens group and a first eyepiece lens group and is used for compressing the aperture of the light beam reflected by the object space field scanning reflector and outputting the light beam; the second aperture adjusting device comprises a second objective lens group and a second eyepiece lens group; a section of parallel light path is arranged between the first aperture adjusting device and the second aperture adjusting device and between the second aperture adjusting device and the rear sub-imaging system, and three dynamic components including an optical despin device, an optical multi-path system and a reverse scanning mirror, which can be sequentially adjusted, are respectively arranged in the two sections of parallel light paths; the optical multi-path system and the reverse scanning mirror are in the same parallel light path, the optical multi-path system realizes rotation in the pitching direction, and the reverse scanning mirror realizes rotation in the azimuth direction; the optical despin device despins the light beams from the second aperture adjusting device or the first aperture adjusting device so as to counteract the image rotation caused by the rotation of the object space field scanning mirror.
Furthermore, the optical multi-path system and the reverse scanning mirror are arranged between the first aperture adjusting device and the second aperture adjusting device, the optical multi-path system is used for realizing field expansion in the pitching direction of the system, compensating the change of a field caused by the rotation of the object space field scanning mirror in the pitching direction, the reverse scanning mirror compensates the change of the field caused by the rotation of the object space field scanning mirror in the azimuth direction, the optical despinning device is arranged between the second aperture adjusting device and the rear sub-imaging system, and the optical despinning device despinning the light beams from the second aperture adjusting device. The optical window is a plane window or a plane splicing window.
Furthermore, the optical despin device is arranged between the first aperture adjusting device and the second aperture adjusting device and is used for receiving the light beams compressed by the aperture of the object space field scanning reflector, the optical multi-path system and the reverse scanning mirror are arranged between the second aperture adjusting device and the rear sub-imaging system, the first objective lens group is used for converging the light beams from the object space field scanning reflector, and the first objective lens group is arranged between the first objective lens group and the optical despin device and is used for converting the light beams from the first objective lens group into parallel light so as to realize the aperture compression of the light beams from the object space field scanning reflector; the second aperture adjusting device is positioned between the optical despinning device and the optical multi-path system, and the second aperture adjusting device is used for compressing the aperture of the light beam output from the optical despinning device and enabling the emergent light beam to be parallel light again. The optical window is a spherical cover which exceeds a hemisphere, and the lower part of the spherical cover is opened.
A multi-functional infrared optical imaging system, its optics despin device include first despin speculum, second despin speculum and third despin speculum, first despin speculum with come from the light beam of object space visual field scanning speculum and become 60 contained angles, second despin speculum and the light beam that comes from the object space visual field scanning speculum be parallel, be located first despin speculum lateral part and be used for reflecting the light beam that comes from first despin speculum, third despin speculum be located second despin speculum lateral part, with first despin speculum about the normal symmetry of second despin speculum.
The multifunctional infrared optical imaging system further comprises a platform signal receiving device, a rotation amount determining device and a control device, wherein the platform signal receiving device is used for receiving rotation data of a platform from the platform on which the imaging system is installed, the rotation amount determining device is used for determining the rotation angle and the direction of the optical despin device based on the rotation data of the platform and the rotation data of the object space field scanning mirror, and the control device is used for controlling the optical despin device to despin based on the determined rotation angle and direction.
The optical derotation device of the multifunctional infrared optical imaging system is an inverted Wei prism or a Pechan prism.
The rear sub-imaging system of the multifunctional infrared optical imaging system comprises a folding reflector, a first rear lens and a second rear lens.
The invention has the beneficial effects that:
two parallel optical paths are provided in the optical system: the optical multi-path system and the reverse scanning mirror are arranged in the parallel optical path I, the optical despinning device is arranged in the parallel optical path II and despins the light beam from the second aperture adjusting device, the optical despinning device can also be arranged in the parallel optical path I and despin the light beam from the first aperture adjusting device, and the optical multi-path system and the reverse scanning mirror are arranged in the parallel optical path II.
The optical despinning device, the optical multi-path system and the reverse scanning mirror are adopted to cooperate with the reflecting mirror for scanning, so that the optical despinning device realizes the compensation of image rotation in the scanning process of the object space field scanning reflecting mirror and eliminates the influence of image rotation; the reverse scanning mirror performs reverse scanning according to the azimuth rotation of the reflecting mirror, so that image blurring caused by the change of an imaging view field to the area array infrared detector in the scanning process of the reflecting mirror is eliminated; the optical multi-path system is used for expanding a pitching visual field and compensating the change of the visual field caused by the rotation of the object visual field scanning mirror in the pitching direction.
The invention realizes the rapid scanning of the object space view field by using the object space view field scanning reflector to replace the common turret integral azimuth rotation and pitching scanning, thereby effectively reducing the system volume and improving the indexes of the system scanning speed and the like. The problem of image real-time rotation brought by object space field scanning reflector scanning is solved. The invention realizes the infrared area array staring imaging through the reverse scanning mirror, the integration time of the detector is long, the resolution ratio and the acting distance of the system are improved, and the integration of the optical multi-path system realizes the field expansion in the pitching direction. The invention realizes the design of a multifunctional infrared optical system by integrating components such as an optical despin device, an optical multi-path system, a reverse scanning mirror and the like in the infrared optical system, and simultaneously ensures that the interior of the infrared system has three-dimensional angular motion compensation capability.
Drawings
FIG. 1 is a schematic structural diagram of one embodiment of the present invention;
fig. 2 is a schematic structural diagram of another embodiment of the present invention.
The figures are numbered: 1-optical window, 2-objective field scanning reflector, 3-first aperture adjusting device, 4-optical despin device, 5-second aperture adjusting device, 6-optical multi-path system, 7-reverse scanning mirror, 8-rear sub-imaging system, 9-area array infrared detector, 10-first reflector, 11-second reflector, 12-first objective lens group, 13-first ocular lens group, 14-first despin reflector, 15-second despin reflector, 16-third despin reflector, 17-second objective lens group, 18-second ocular lens group, 19-folding reflector, 20-first rear lens and 21-second rear lens.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
Example 1
As shown in fig. 1, which illustrates one embodiment of the infrared optical imaging system of the present invention.
In this embodiment, the infrared optical imaging system includes: the system comprises an optical window 1, an object space view field scanning reflector 2, a first aperture adjusting device 3, an optical multi-path system 6, a reverse scanning mirror 7, a second aperture adjusting device 5, an optical despinning device 4, a rear sub-imaging system 8 and an area array infrared detector 9, and is used for realizing regional scanning imaging of system pitching and direction. The optical window 1 is a plane window/plane splicing window and covers the object space field scanning reflecting mirror 2. Wherein the second aperture adjusting device 5 comprises a second objective lens group 17 and a second eyepiece lens group 18. The window has good transmission capability to infrared light.
The object space view field scanning reflector 2 is composed of a first reflector 10 and a second reflector 11, the object space view field scanning is realized by that the first reflector 10 rotates around a horizontal connecting line of the first reflector 10 and the second reflector 11 as an axis as shown in the figure, and the first reflector 10 and the second reflector 11 of the overlapped object space view field scanning reflector 2 rotate around a vertical optical axis as shown in the figure in an azimuth manner.
In the present embodiment, the first aperture adjustment device 3 is used to compress the aperture of the light beam received by the object field scanning mirror 2. Specifically, the first aperture adjustment device 3 includes the first objective lens group 12 (focal length f0 ') and the first eyepiece lens group 13 (focal length fe'). The first objective lens group 12 and the first eyepiece lens group 13 are located between the object space field scanning mirror 2 and the optical multiplexing system 6, and are configured to convert the light beam from the object space field scanning mirror 2 into parallel light and compress the aperture of the light beam.
The optical multi-path system 6 and the inverse scanning mirror 7 are arranged in the same parallel optical path between the first aperture adjusting device 3 and the second aperture adjusting device 5, the optical multi-path system 6 is used for realizing the field expansion of the system in the pitching direction and compensating the change of the field caused by the rotation of the object space field scanning reflecting mirror 2 in the pitching direction, and the inverse scanning mirror 7 compensates the change of the field caused by the rotation of the object space field scanning reflecting mirror 2 in the azimuth direction.
The optical despin device 4 despins the light beam from the second aperture adjusting device 5 to cancel the image rotation caused by the rotation of the object field scanning mirror 2. In the present embodiment, the optical despin device 4 includes: a first derotation mirror 14, a second derotation mirror 15 and a third derotation mirror 16. The first derotation mirror 14 is located in the parallel optical path of the light beam from the second aperture adjusting means 5 at an angle of 60 ° to the optical axis of the light beam. The second derotation mirror 15 is located on the side of the first derotation mirror 14 (left side in fig. 1), and as can be seen from the figure, the light beam incident on the first derotation mirror 14 is reflected, further converged and incident on the second derotation mirror 15. The second derotation mirror 15 is parallel to the optical axis of the light beam from the second aperture adjusting means 5, and thus the light beam reflected by the second derotation mirror 15 is reflected toward the third derotation mirror 16 symmetrically with respect to the normal thereof. The third derotation mirror 16 receives the reflected light from the second derotation mirror 15 and the third derotation mirror 16 is positioned to ensure that the light beam reflected by the third derotation mirror 16 is on the extension of the light beam from the second aperture adjustment means 5 so that the light beam can be obtained at a fixed position downstream of the derotation means even if the whole derotation means is rotated. In this embodiment, the third derotation mirror 16 is angled 30 degrees from the beam from the second derotation mirror 15. More specifically, the third derotation mirror 16 is symmetrical with the first derotation mirror 14 about the normal to the second derotation mirror 15.
Of course, in other embodiments, the optical despin device 4 may also adopt other devices, for example, an optical component with an image rotation function, such as an inverted-power prism, a Pechan prism, etc.
The optical multi-path system 6 and the reverse-scanning mirror 7 are in the same section of parallel light path, the optical despin device 4 is in the other section of parallel light path of the infrared optical system, and the two sections of parallel light paths in one optical system realize multifunctional fusion, in other embodiments, the sequence of the optical multi-path system 6 and the reverse-scanning mirror 7 can be interchanged, or the optical despin device 4 can be placed in the first section of parallel light path, and the components of the optical multi-path system 6 and the reverse-scanning mirror 7 are placed in the second section of parallel light path.
The optical multi-path system 6 and the reverse scanning mirror 7 rotate around the directions respectively perpendicular to the optical axes of the light beams to compensate the change of the visual field caused by the rotation of the object space visual field scanning mirror 2 in the pitching direction and the azimuth direction, and the optical multi-path system 6 also plays a role of expanding the visual field in the pitching direction. This rotation of the optical multi-path system 6 and the anti-scanning mirror 7 is important because, when the infrared area array detector is used for imaging, because the system object space field scanning mirror 2 continuously performs object space field scanning and rotation in both pitch and azimuth directions, the detector cannot image the same scene in the integration time of acquiring one frame of image, and the detector integrates the changed image and then the image is obviously smeared, so that the image is blurred.
After the optical multi-path system 6 and the reverse-scan mirror 7 are added, every time the object field scanning mirror 2 rotates by 1 degree, the optical multi-path system 6 and the reverse-scan mirror 7 rotate reversely by a corresponding degree, so that the system can image the same scene during integration. The angle by which the optical multiplexing system 6 and the anti-scanning mirror 7 are rotated depends on the magnification of the field of view by the first aperture adjustment device 3 and the angle of rotation of the object field scanning mirror 2. For example, when the object field scanning mirror 2 is rotated azimuthally by 1 degree, if the aperture compression ratio which can be achieved by the first aperture adjusting device 3 is 2, that is, the diameter of the light beam from the object field scanning mirror 2 is reduced to 1/2, the reverse scanning mirror 7 needs to be rotated reversely by 2 degrees. The inversion referred to herein is an inversion with respect to an image, and does not simply mean an inversion in a spatial orientation. The optical multi-path system 6 rotates in the same direction as the inverse scanning mirror 7.
As shown in fig. 1, the light beam on which the optical multi-path system 6 is incident is reflected toward the horizontal left direction, and the optical multi-path system 6 is rotated about an axis perpendicular to the paper surface direction. The mirror 7 reflects the light beam incident thereon toward the direction outside the paper, and the mirror 7 rotates about an axis parallel to the paper direction.
The post-positioned sub-imaging system 8 receives the light beam reflected by the optical despin device 4 from the optical despin device and converges the light beam to the target surface of the area array infrared detector 9; the area array infrared detector 9 receives the converged light beam and images the light beam. In the present embodiment, the post-sub imaging system 8 includes: the first rear lens 20 and the second rear lens 21 may optionally have a folding mirror 19 therebetween, and the position of the folding mirror 19 of the rear sub-imaging system 8 may be arranged as the light path folding position according to the layout requirement.
Example 2
Another embodiment of the infrared optical imaging system of the present invention is shown in fig. 2.
In this embodiment, the infrared optical imaging system includes: the device comprises an optical window 1, an object space view field scanning reflector 2, a first aperture adjusting device 3, an optical despinning device 4, a second aperture adjusting device 5, an optical multi-path system 6, a reverse scanning mirror 7, a rear sub-imaging system 8 and an area array infrared detector 9. A structure similar to that in example 1 was employed. The optical window 1 is a spherical cover which exceeds a hemisphere, the lower part of the spherical cover is opened, and the spherical cover is covered outside the two-dimensional object space view field scanning reflector 2. The spherical cover has good transmission capability to infrared light. Two-dimensional scanning about the major and minor axes of the first mirror 10 can also be used to achieve object field scanning. The optical window 1 covers the object-side field-of-view scanning area: can rotate in both pitch and azimuth directions to perform panoramic scanning. Preferably, the rotation axis of the two-dimensional object space field-of-view scanning mirror 2 in the azimuth direction is located at the center of the sphere of the spherical cap, and the center of the surface of the two-dimensional object space field-of-view scanning mirror 2 is located at the center of the sphere of the spherical cap.
The optical despin device 4 is in the first section of parallel optical path of the system, the optical multi-path system 6 and the anti-scanning mirror 7 are in the second section of parallel optical path, and the multi-function fusion is realized through two sections of parallel optical paths in one optical system, in other embodiments, the order of the optical multi-path system 6 and the anti-scanning mirror 7 can be interchanged.
The area array infrared detector 9 in the invention adopts a refrigeration type area array infrared detector. In order to realize the 100% cold diaphragm efficiency of the system and reduce the aperture of the system, the rear sub-imaging system 8 adopts a secondary imaging structure form, namely a primary image surface is arranged between the first rear lens 20 and the second rear lens 21; the first caliber adjusting device 3 and the second caliber adjusting device 5 adopt a Kepler structure form, and can also adopt a Galileo structure form; the aperture of the optical multi-path system 6 and the aperture of the anti-scanning mirror 7 are reduced by the first aperture adjusting device 3 and the second aperture adjusting device 5, and the aperture of the optical despinning device 4 is also reduced.
In order to improve the scanning speed of the system, the invention reduces the rotation moment and the moment of inertia of the optical multi-path system 6 and the inverse scanning mirror 7, and improves the scanning control precision by replacing the integral azimuth and pitching rotation with the rotation of the object space field scanning reflecting mirror 2.
The invention adopts an optical multi-path system in an infrared optical system to realize the expansion of a pitching view field, and expands the pitching view field of the system from 3 degrees to 4.5 degrees by using an optical multi-path technology under the condition of selecting the same focal length and a detector; the field scanning motion in the system module causes image blurring in the integration time of the area array detector, and a reverse scanning technology is integrated in the system to compensate the image tailing caused by horizontal scanning of the system; meanwhile, an optical de-imaging rotation device is integrated in the infrared optical system to eliminate image rotation caused by scanning.
The optical imaging system of the present invention further comprises a platform signal receiving means for receiving rotation data of the platform from the platform on which the multifunctional infrared optical imaging system is mounted, a rotation amount determining means for determining a rotation angle and a direction of the optical despin means 4 based on the rotation data of the platform and the rotation data of the object field scanning mirror 2, and a control means for controlling the optical despin means 4 to perform despin based on the determined rotation angle and direction.
In order to avoid image blurring in the integration time of the area array detector caused by field scanning motion in a system module, the invention integrates a reverse scanning technology in the system to compensate image trailing caused by horizontal scanning of the system; an image rotation eliminating device is integrated in the infrared optical system to eliminate the image rotation caused by the two-dimensional scanning of the object space field.
In order to ensure that the system improves the view field of the system in the pitching direction on the premise of ensuring the focal length and the caliber required by the action distance and avoid the contradiction between the enlarged focal length and the enlarged view field, the invention integrates the optical multipath technology in the optical system to enlarge the pitching view field, and under the condition of selecting the same focal length and the same detector, the optical multipath technology is utilized to expand the pitching view field of the system from 3 degrees to 4.5 degrees and improve the core indexes of the system such as the scanning speed in the pitching direction and the like.
The optical imaging system of the invention is beneficial to meeting the miniaturization requirement of the warning search infrared imaging device, and particularly has the following advantages:
1, the volume is miniaturized. The system adopts object space view field two-dimensional scanning to replace the existing turret two-dimensional rotation, so that a larger two-dimensional rotation scanning head is not needed, and the weight is greatly reduced; the rotating moment and the moment of inertia of the reflecting mirror are much smaller than those of a turret, so that the azimuth and pitching scanning rotating speed of the system is improved.
2, the invention integrates object space view field scanning, real-time despinning, optical multi-path system and reverse scanning functions. The image rotation brought by the object space field scanning reflector is eliminated in real time through the optical despinning device, and meanwhile, the miniaturization design of the despinning device is guaranteed; the system abandons a linear array detector, adopts an area array detector, solves the problem of system field change caused by azimuth rotation in the area array detector integration time by adopting a reverse scanning staring imaging technology, receives more scenery energy and improves the system action distance; the system elevation direction view field is enlarged and the object space view field scanning reflector elevation angle error is compensated through the optical multi-path system.
And 3, the system integrates real-time despinning, an optical multi-path system and a reverse scanning function, and meanwhile, the optical system has three-dimensional angular motion compensation capability.
The present invention is not limited to the above-mentioned preferred embodiments, and any person skilled in the art can derive other variants and modifications within the scope of the present invention, however, any variation in shape or structure is within the scope of protection of the present invention, and any technical solution similar or equivalent to the present application is within the scope of protection of the present invention.
Claims (9)
1. A multifunctional infrared optical imaging system is characterized in that: an optical window (1), an object space field scanning reflector (2), a first aperture adjusting device (3), a second aperture adjusting device (5), a rear sub-imaging system (8) and an array infrared detector (9) are sequentially arranged from an object space to an image space;
the optical window (1) covers the outer side of the object space field scanning reflector (2);
the object space view field scanning reflector (2) consists of a first reflector (10) and a second reflector (11), and rotates around a rotating shaft to perform object space view field scanning;
the first aperture adjusting device (3) comprises a first objective lens group (12) and a first eyepiece lens group (13) and is used for compressing the aperture of the light beam reflected by the objective field scanning reflector (2);
the second aperture adjusting device (5) comprises a second objective lens group (17) and a second eyepiece lens group (18);
a section of parallel light path is arranged between the first caliber adjusting device (3) and the second caliber adjusting device (5) and between the second caliber adjusting device (5) and the rear sub-imaging system (8), an optical despinning device (4), an optical multi-path system (6) and a reverse scanning mirror (7) which are sequentially adjustable are respectively arranged in the two sections of parallel light paths, the optical multi-path system (6) realizes rotation in the pitching direction, and the reverse scanning mirror (7) realizes rotation in the azimuth direction;
the optical despin device (4) despin the light beam from the second aperture adjusting device (5) or the first aperture adjusting device (3) so as to counteract the image rotation caused by the rotation of the object space field scanning mirror (2).
2. A multifunctional infrared optical imaging system according to claim 1, characterized in that said optical multiplexing system (6) and said anti-sweep mirror (7) are disposed between said first aperture adjusting means (3) and said second aperture adjusting means (5), and said optical despinning device (4) is disposed between said second aperture adjusting means (5) and said post-positioned sub-imaging system (8) for despinning the light beams from said second aperture adjusting means (5).
3. A multifunctional infrared optical imaging system according to claim 2 characterized in that said optical window (1) is a plane window or a plane splicing window.
4. The multifunctional infrared optical imaging system according to claim 1, characterized in that the optical despin device (4) is disposed between the first aperture adjusting device (3) and the second aperture adjusting device (5) and receives the light beam aperture-compressed by the objective field scanning mirror (2), the optical multiplexing system (6) and the reverse scanning mirror (7) are disposed between the second aperture adjusting device (5) and the rear sub-imaging system (8), and the first objective group (12) is used for converging the light beam from the objective field scanning mirror (2); the second aperture adjusting device (5) is positioned between the optical despinning device (4) and the optical multiplexing system (6), and the second aperture adjusting device (5) is used for compressing the aperture of the light beam output from the optical despinning device (4) and enabling the emergent light beam to be parallel light again.
5. Multifunctional infrared optical imaging system according to claim 4 characterized in that the optical window (1) is a spherical cap over a hemisphere, the lower part of which is open.
6. A multifunctional infrared optical imaging system according to any one of claims 1 to 5, characterized in that said optical derotation device (4) comprises a first derotation mirror (14), a second derotation mirror (15) and a third derotation mirror (16), said first derotation mirror (14) being at an angle of 60 ° with respect to the light beam from the object space field scan mirror (2), said second derotation mirror (15) being parallel to the light beam from the object space field scan mirror (2) and being located at the side of the first derotation mirror (14) for reflecting the light beam from the first derotation mirror (14), said third derotation mirror (16) being located at the side of the second derotation mirror (15) and being symmetrical to the first derotation mirror (14) about the normal of the second derotation mirror (15).
7. The multifunctional infrared optical imaging system according to claim 6, further comprising a platform signal receiving means for receiving rotation data of the platform from the platform on which the imaging system is mounted, a rotation amount determining means for determining a rotation angle and a direction of the optical despinning means (4) based on the rotation data of the platform and the rotation data of the object field scanning mirror (2), and a control means for controlling the optical despinning means (4) to perform despinning based on the determined rotation angle and direction.
8. The multifunctional infrared optical imaging system according to claim 7, characterized in that the optical despinning device (4) is a RouWei prism or Pechan prism.
9. A multifunctional infrared optical imaging system according to claim 8 characterized in that said rear sub-imaging system (8) comprises a turning mirror (19), a first rear lens (20) and a second rear lens (21).
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| CN102354053B (en) * | 2011-10-31 | 2014-02-12 | 四川九洲电器集团有限责任公司 | Flyback optical system and method for eliminating image blurring |
| CN102645729B (en) * | 2012-04-24 | 2014-01-08 | 中国电子科技集团公司第十一研究所 | Infrared optical system |
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