基于多通道光学对接的机载微光成像系统设计

IF 2.1 4区 物理与天体物理 Q2 OPTICS
Jianwei Peng, Hongtao Yang, Yangjie Lei, Wanrong Yu, Weining Chen, Guangdong Zhang
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引用次数: 0

摘要

为了在极低照度(0.01 Lux)下实现远距离、高分辨率和超宽视场机载地球成像,研究了一种基于多探测器光学对接的低照度成像系统。在分解了该系统的规格并验证了其低照度成像能力后,我们提出采用大相对孔径、低畸变的光学系统,通过 8 个 1080P 高灵敏度科学互补金属氧化物半导体(SCMOS)探测器的视场对接实现成像。本文阐述了成像系统机械结构的设计理念,研究了反射棱镜结构参数的计算方法,给出了拼接棱镜的长度和宽度等几何参数的数学表达式,并详细设计了用于八通道分光的六个反射棱镜的拼接结构。根据设计和计算结果,开发出了环境照度为 0.01 Lux 的高分辨率宽扫描成像系统。该低照度成像系统的地面采样距离(GSD)为 0.5 米(飞行高度为 5 千米),相邻探测器之间的 FOV 重叠率低于 3%,有效图像分辨率为 4222 × 3782。飞行测试结果表明,拟议的成像系统能够在机载和弱光条件下生成宽扫描范围、高对比度的图像。因此,该系统的制备方法可作为开发机载弱光成像设备的参考点。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Design of an Airborne Low-Light Imaging System Based on Multichannel Optical Butting
For the purpose of achieving long-range, high-resolution, and ultra-wide-swath airborne earth imaging at extremely low-light levels (0.01 Lux), a low-light imaging system built on multi-detector optical butting was researched. Having decomposed the system’s specifications and verified its low-light imaging capability, we proposed to employ an optical system with a large relative aperture and low distortion and achieve imaging through the field-of-view (FOV) butting facilitated by eight 1080P high-sensitivity scientific complementary metal-oxide semiconductor (SCMOS) detectors. This paper elaborates on the design concept of the mechanical configuration of the imaging system; studies the calculation method of the structural parameters of the reflection prism; provides mathematical expressions for geometric parameters, such as the length and width of the splicing prism; and designs in detail the splicing structure of six reflection prisms for eight-channel beam splitting. Based on the design and computational results, a high-resolution, wide-swath imaging system for an ambient illuminance of 0.01 Lux was developed. Exhibiting a ground sampling distance (GSD) of 0.5 m (at a flight height of 5 km), this low-light imaging system keeps the FOV overlap ratio between adjacent detectors below 3% and boasts an effective image resolution of 4222 × 3782. The results from flight testing revealed that the proposed imaging system is capable of generating wide-swath, high-contrast resolution imagery under airborne and low-light conditions. As such, the way the system is prepared can serve as a reference point for the development of airborne low-light imaging devices.
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来源期刊
Photonics
Photonics Physics and Astronomy-Instrumentation
CiteScore
2.60
自引率
20.80%
发文量
817
审稿时长
8 weeks
期刊介绍: Photonics (ISSN 2304-6732) aims at a fast turn around time for peer-reviewing manuscripts and producing accepted articles. The online-only and open access nature of the journal will allow for a speedy and wide circulation of your research as well as review articles. We aim at establishing Photonics as a leading venue for publishing high impact fundamental research but also applications of optics and photonics. The journal particularly welcomes both theoretical (simulation) and experimental research. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Electronic files and software regarding the full details of the calculation and experimental procedure, if unable to be published in a normal way, can be deposited as supplementary material.
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