The focal length control method for optical remote sensor

Chao Zhang; Xiting Zhao; Wenchun Jiao; Xuemin Wei

doi:10.1117/12.2196773

8 October 2015 The focal length control method for optical remote sensor

Chao Zhang, Xiting Zhao, Wenchun Jiao, Xuemin Wei

Proceedings Volume 9677, AOPC 2015: Optical Test, Measurement, and Equipment; 967703 (2015) https://doi.org/10.1117/12.2196773
Event: Applied Optics and Photonics China (AOPC2015), 2015, Beijing, China

Abstract

With the rapid development of the optical remote sensor technology, it puts forward higher requirements to the sensor’s index. For space camera with large field of view, long focal distance, the image quality and the focal length of the various parameters of the optical system puts forward higher requirements. Therefore how to meet the control index of the sensors put forward new problems for the alignment. The present reports on focal length mainly around the focal length calculation and accurate measurement, but there is no report about how to accurately control the focal length. This article proposed a method for combinatorial optimization based on the focal length and image quality evaluation, geometrical parameter error of the iterative optimization to obtain the best mirror distance compensation combination, that establish mirror-distance compensation control curve to guide the camera alignment process. The focus control precision is less than 1%, the field of view system surface shape is better than 0.08 λ.

Citation Download Citation

Chao Zhang, Xiting Zhao, Wenchun Jiao, and Xuemin Wei "The focal length control method for optical remote sensor", Proc. SPIE 9677, AOPC 2015: Optical Test, Measurement, and Equipment, 967703 (8 October 2015); https://doi.org/10.1117/12.2196773

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KEYWORDS

Mirrors

Cameras

Monochromatic aberrations

Error analysis

Sensors

Control systems

Image quality

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