On-Orbit Self-Focusing Using Conjugated Optical Fiber Waveguides for Space Optical Cameras

被引：3

作者：

Li, Jin ^{[1
]}

Xing, Fei ^{[2
,3
]}

Shrestha, Pawan Kumar ^{[1
]}

Shi, Fengyuan ^{[1
]}

Liu, Zilong ^{[4
]}

机构：

[1] Univ Cambridge, Dept Engn, Cambridge CB2 1TN, England

[2] Tsinghua Univ, Dept Precis Instrument, Beijing 100084, Peoples R China

[3] Tsinghua Univ, State Key Lab Precis Measurement Technol & Instru, Beijing 100084, Peoples R China

[4] Natl Inst Metrol, Opt Div, Beijing 100029, Peoples R China

来源：

IEEE GEOSCIENCE AND REMOTE SENSING LETTERS | 2019年 / 16卷 / 11期

关键词：

Optical imaging; Optical sensors; Adaptive optics; Cameras; Optical distortion; Optical fibers; Optical fiber waveguides; remote sensing camera; self-focusing; MODULATION TRANSFER-FUNCTION;

D O I：

10.1109/LGRS.2019.2909825

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

High-precision focusing of space optical cameras is the prerequisite for capturing high-quality images in earth observation applications. On-orbit focusing methods are basically based on image-processing algorithms. However, these focusing methods have several limitations, such as calculation complexity, low reliability, and high susceptibility to noises. We propose a real-time self-focusing method using conjugated optical fiber waveguides, which can measure the focal length of on-orbit cameras in real time. We use two conjugated optical fiber waveguides. At one end of each waveguide, there is a light source located external to the camera. The light is guided into the focal plane of the camera and it acts as an infinite point target. Contrary to image processing algorithm, our method is based on the optical components for focusing.

引用

页码：1703 / 1705

页数：3