Design of large format focal-plane shutter with high frame-frequency and orthogonality

LENG Xue; ZHANG Hong-wen; LIU Ming; LI Wen-ming

doi:10.3788/OPE.20111911.2630

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Design of large format focal-plane shutter with high frame-frequency and orthogonality

Article | 更新时间：2020-08-12

- Design of large format focal-plane shutter with high frame-frequency and orthogonality
- Optics and Precision Engineering Vol. 19, Issue 11, Pages: 2630-2635(2011)
- 作者机构：
  
  中国科学院长春光学精密机械与物理研究所,吉林长春,中国,130033
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20111911.2630
  CLC： V248.1
- Received：03 May 2011，
  
  Revised：09 June 2011，
  
  Published Online：25 November 2011，
  
  Published：25 November 2011
- 稿件说明：
移动端阅览
冷雪, 张洪文, 刘明, 李文明. 高频正交大面阵焦平面快门设计[J]. 光学精密工程, 2011,19(11): 2630-2635

LENG Xue, ZHANG Hong-wen, LIU Ming, LI Wen-ming. Design of large format focal-plane shutter with high frame-frequency and orthogonality[J]. Editorial Office of Optics and Precision Engineering, 2011,19(11): 2630-2635
冷雪, 张洪文, 刘明, 李文明. 高频正交大面阵焦平面快门设计[J]. 光学精密工程, 2011,19(11): 2630-2635 DOI： 10.3788/OPE.20111911.2630.

LENG Xue, ZHANG Hong-wen, LIU Ming, LI Wen-ming. Design of large format focal-plane shutter with high frame-frequency and orthogonality[J]. Editorial Office of Optics and Precision Engineering, 2011,19(11): 2630-2635 DOI： 10.3788/OPE.20111911.2630.

摘要

针对1 000 mm焦距透射式光学系统面阵相机

设计了一种高频大面阵焦平面快门。为了满足长焦距航空成像系统高分辨率和宽覆盖的要求

新设计的焦平面快门结构采用单帘幕多缝式设计

通过两个快门正交布置

电机带动齿轮同步驱动

使得两片光学拼接的面阵CCD同时曝光。数字信号处理器(DSP)根据编码器反馈的帘速信号来控制电机转速

保证CCD均匀曝光。实验结果表明

快门曝光时间在1/200~1/1 000 s连续可调

拍照帧频最大可达4 frame/s

快门寿命大于20万次

曝光均匀性在8%以内

满足大面阵CCD相机成像要求。

Abstract

A new large format focal-plane shutter with high frame frequency is designed to the space camera with a transmission optical system and a focal length of 1 000 mm. The focal plane shutter adopts a single curtain with multiple slits in structure

and two shutters are orthogonal layout and are driven synchronously by a motor with gears. The design allows to exposure of two stitched area CCD simultaneously. A Digital Signal Processor (DSP) is used to control the motor velocity according to the curtain encoder

so as to ensure the exposure uniformity of the CCD. The experiment results show that this new shutter has a higher stability of movement

a long life span more than 210

operating times

a wide range of exposure time in 1/ 200 s to 1/ 1 000 s and a exposure error within 8%.Moreover

the max frame frequency can be 4 frame/s. The performance of this shutter is fully satisfied with the requirements of area scan CCD aerial cameras.

关键词

Keywords

references

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