CN105759419A - Medium wave infrared image space scanning optical system having oscillating mirror - Google Patents
Medium wave infrared image space scanning optical system having oscillating mirror Download PDFInfo
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- CN105759419A CN105759419A CN201610217307.6A CN201610217307A CN105759419A CN 105759419 A CN105759419 A CN 105759419A CN 201610217307 A CN201610217307 A CN 201610217307A CN 105759419 A CN105759419 A CN 105759419A
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- 230000003287 optical effect Effects 0.000 title abstract description 15
- 238000003384 imaging method Methods 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 description 2
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- 239000005357 flat glass Substances 0.000 description 1
- 238000003331 infrared imaging Methods 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
- G02B26/105—Scanning systems with one or more pivoting mirrors or galvano-mirrors
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Abstract
带摆镜的中波红外像方扫描光学系统,包括前置镜组1、摆镜2、固定反射镜3、成像镜组4，其中前置镜组包括前置镜A5、前置镜B6，光线经过前置镜A、前置镜B后聚焦到一次像面7上，再传递到摆镜上，其中一次像面的曲率中心与摆镜的回转中心重合，光线经摆镜反射后传递到固定反射镜上，固定反射镜最终将光线传递给成像镜组；通过摆镜的旋转，实现对目标的扫描。
Mid-wave infrared image square scanning optical system with swing mirror, including front mirror group 1, swing mirror 2, fixed mirror 3, imaging mirror group 4, wherein the front mirror group includes front mirror A5, front mirror B6, After the light passes through the front mirror A and the front mirror B, it is focused on the primary image surface 7, and then transmitted to the swing mirror, where the curvature center of the primary image surface coincides with the rotation center of the swing mirror, and the light is reflected by the swing mirror and then transmitted to the On the fixed mirror, the fixed mirror finally transmits the light to the imaging mirror group; through the rotation of the swing mirror, the scanning of the target is realized.
Description
一、技术领域1. Technical field
本发明涉及扫描光学领域，具体涉及一种带摆镜的中波红外像方扫描光学系统The invention relates to the field of scanning optics, in particular to a mid-wave infrared image square scanning optical system with a swing mirror
二、背景技术2. Background technology
关于带摆镜的中波红外像方扫描光学系统，尚未有公开专利。Regarding the mid-wave infrared image square scanning optical system with an oscillating mirror, there is no published patent yet.
根据检索，目前扫描形式的中波红外导引头主要方式为物方扫描，另有人提出像方扫描的基本形式。两种方式各有优缺点。According to the search, the main mode of the current scanning medium-wave infrared seeker is object-space scanning, and others have proposed the basic form of image-space scanning. Both ways have advantages and disadvantages.
物方扫描形式由凝视型红外热像仪及二维转台组成，由二维转台带动凝视型红外热像仪整机进行二维转动，因此二维转台要承载红外热像仪整机的重量，其体积较大；其次，由于热像仪冷光阑远离系统第一片镜，因此第一片镜口径较大；再次，扫描视场决定了系统窗口口径大小，物方扫描形式的光学系统往往窗口口径很大；此外红外成像导引头光学系统由于转台的载荷较大，转动角速度收到限制，因此扫描速度较慢。The scanning form of the object space is composed of a staring infrared thermal imager and a two-dimensional turntable. The two-dimensional turntable drives the staring infrared thermal imager to rotate two-dimensionally. Therefore, the two-dimensional turntable must carry the weight of the infrared thermal imager. Its volume is large; secondly, because the cold aperture of the thermal imager is far away from the first mirror of the system, the first mirror has a larger aperture; thirdly, the scanning field of view determines the size of the system window, and the optical system in the form of object-side scanning often has a window The aperture is large; in addition, the infrared imaging seeker optical system has a relatively slow scanning speed due to the large load of the turntable and the limited rotational angular velocity.
目前已有人提出了像方扫描形式的光学系统。像方扫描光学系统基于二次成像光学系统，与物方扫描相比，在设计时可将光阑提前，能够有效减小系统口径及窗口玻璃的口径，在通过加入反射镜等折转光路的手段可以有效的缩小整机尺寸及重量。其由两部分组成，前组将大视场景物成像在弯曲的像面上，后组扫描弯曲像面，并二次成像在制冷探测器焦平面上。该形式为像方扫描的基本形式，虽然减小了系统口径，但二维转台载荷并没有减轻，仍然为制冷探测器及后组成像镜头。At present, an optical system in the form of image square scanning has been proposed. The image-space scanning optical system is based on the secondary imaging optical system. Compared with the object-space scanning, the aperture can be advanced in design, which can effectively reduce the aperture of the system and the aperture of the window glass. The method can effectively reduce the size and weight of the whole machine. It consists of two parts. The front group images the large field of view on the curved image plane, and the rear group scans the curved image plane and re-images it on the focal plane of the cooling detector. This form is the basic form of image square scanning. Although the system aperture is reduced, the load on the two-dimensional turntable is not reduced, and it is still a cooling detector and a rear imaging lens.
三、附图说明3. Description of drawings
图1为本发明所述的带摆镜的中波红外像方扫描光学系统结构示意图Fig. 1 is a structural schematic diagram of the mid-wave infrared image square scanning optical system with a pendulum mirror according to the present invention
图中：1前置镜组、2摆镜、3固定反射镜、4中继镜组、5前置镜A、6前置镜B、7一次像面In the figure: 1 front mirror group, 2 swing mirror, 3 fixed mirror, 4 relay mirror group, 5 front mirror A, 6 front mirror B, 7 primary image plane
四、发明内容4. Contents of the invention
发明目的：通过研究像方扫描的基本形式与加入摆镜后的改进形式之间设计条件的变化，设计带摆镜的中波红外像方扫描光学系统，实现在其基本形式的基础上进一步缩小空间，减小回转机构载荷，从而加快扫描速度，并减小系统复杂程度Purpose of the invention: By studying the change of design conditions between the basic form of image square scanning and the improved form after adding a swing mirror, design a mid-wave infrared image square scanning optical system with a swing mirror, and realize further reduction on the basis of its basic form space, reduce the load of the slewing mechanism, thereby speeding up the scanning speed and reducing the complexity of the system
技术方案：一种带摆镜的中波红外像方扫描光学系统，包括前置镜组、摆镜、固定反射镜、成像镜组，其中前置镜组包括前置镜A、前置镜B，光线经过前置镜A、前置镜B后聚焦到一次像面上，再传递到摆镜上，光线经摆镜反射后传递到固定反射镜上，固定反射镜最终将光线传递给成像镜组；通过摆镜的旋转，实现对目标的扫描。Technical solution: A mid-wave infrared image square scanning optical system with a swing mirror, including a front mirror group, a swing mirror, a fixed mirror, and an imaging mirror group, wherein the front mirror group includes a front mirror A and a front mirror B , the light is focused on the primary image surface after passing through the front mirror A and front mirror B, and then transmitted to the swing mirror, the light is reflected by the swing mirror and then transmitted to the fixed reflector, and the fixed reflector finally transmits the light to the imaging mirror group; through the rotation of the pendulum mirror, the scanning of the target is realized.
其中一次像面7的曲率中心与摆镜2的回转中心重合。The center of curvature of the primary image plane 7 coincides with the center of rotation of the swing mirror 2 .
技术效果：与同样设计指标并已经使用的物方扫描形式光学系统整机相比，尺寸由Φ300mm×500mm缩小至Φ200mm×300mm；整机重量由原来的15kg较小到7kg，二维回转机构载荷由3kg降低到0.5kg，从而增加了扫描速度。因此带摆镜的像方扫描形式的光学系统降低了系统的复杂程度，有效的减小了系统体积及重量，增加扫描速度。Technical effect: Compared with the object-space scanning optical system with the same design index and already in use, the size is reduced from Φ300mm×500mm to Φ200mm×300mm; the weight of the whole machine is reduced from 15kg to 7kg, and the load of the two-dimensional slewing mechanism Reduced from 3kg to 0.5kg, thus increasing the scanning speed. Therefore, the image square scanning optical system with swing mirror reduces the complexity of the system, effectively reduces the volume and weight of the system, and increases the scanning speed.
五、具体实施方式5. Specific implementation
带摆镜的中波红外像方扫描光学系统,包括前置镜组1、摆镜2、固定反射镜3、成像镜组4，其中前置镜组包括前置镜A5、前置镜B6，光线经过前置镜A5、前置镜B6后聚焦到一次像面7上，再传递到摆镜上，其中一次像面的曲率中心与摆镜的回转中心重合，光线经摆镜反射后传递到固定反射镜上，固定反射镜最终将光线传递给成像镜组；通过摆镜的旋转，实现对目标的扫描。Mid-wave infrared image square scanning optical system with swing mirror, including front mirror group 1, swing mirror 2, fixed mirror 3, imaging mirror group 4, wherein the front mirror group includes front mirror A5, front mirror B6, The light is focused on the primary image plane 7 after passing through the front mirror A5 and the front mirror B6, and then transmitted to the swing mirror, where the curvature center of the primary image plane coincides with the rotation center of the swing mirror, and the light is reflected by the swing mirror and then transmitted to On the fixed mirror, the fixed mirror finally transmits the light to the imaging mirror group; through the rotation of the oscillating mirror, the scanning of the target is realized.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106643689A (en) * | 2016-09-19 | 2017-05-10 | 中国运载火箭技术研究院 | Multi-mode common-optical path pose measuring apparatus |
| CN107907979A (en) * | 2017-11-17 | 2018-04-13 | 北京长峰科威光电技术有限公司 | A kind of space optical axis offset method of refrigeration mode infrared thermal imaging camera lens |
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| CN101158746A (en) * | 2007-11-27 | 2008-04-09 | 北京空间机电研究所 | Spatial Large Aperture Compressed Beam Relay Scanning Imaging Optical System |
| CN204539333U (en) * | 2015-03-19 | 2015-08-05 | 北京空间机电研究所 | A kind of pair sweep mechanism that adopts realizes high-altitude distant reconnaissance supervision imaging system |
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2016
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Patent Citations (3)
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| GB2247090A (en) * | 1990-07-24 | 1992-02-19 | Barr & Stroud Ltd | Flat-field scanner |
| CN101158746A (en) * | 2007-11-27 | 2008-04-09 | 北京空间机电研究所 | Spatial Large Aperture Compressed Beam Relay Scanning Imaging Optical System |
| CN204539333U (en) * | 2015-03-19 | 2015-08-05 | 北京空间机电研究所 | A kind of pair sweep mechanism that adopts realizes high-altitude distant reconnaissance supervision imaging system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106643689A (en) * | 2016-09-19 | 2017-05-10 | 中国运载火箭技术研究院 | Multi-mode common-optical path pose measuring apparatus |
| CN107907979A (en) * | 2017-11-17 | 2018-04-13 | 北京长峰科威光电技术有限公司 | A kind of space optical axis offset method of refrigeration mode infrared thermal imaging camera lens |
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Application publication date: 20160713 |