Design of a Dual-Band Compact Integrated Remote Sensing System for Visible Light and Long-Wave Infrared

This paper presents a design of a dual-band integrated space telescope system for visible light and long-wave infrared. The system can simultaneously image the visible light band of 450–900 nm and the long-wave infrared band of 7700–10,500 nm. The dual-band integrated imaging system can freely switc...

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Bibliographic Details
Published inApplied sciences Vol. 11; no. 20; p. 9370
Main Authors Li, Ruichang, Zou, Gangyi, Feng, Liangjie, Fan, Xuewu
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.10.2021
Subjects
Ambient temperature
Aperture
Cameras
compact structure
Design
Environmental changes
Field of view
Infrared imaging systems
Infrared spectra
integrated system
Light
long wave infrared
Mirrors
Modulation transfer function
Optical communication
Payloads
Remote sensing
Remote sensing systems
Secondary mirrors
Sensors
Space telescopes
Temperature tolerance
visible light
United States > US
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Summary:This paper presents a design of a dual-band integrated space telescope system for visible light and long-wave infrared. The system can simultaneously image the visible light band of 450–900 nm and the long-wave infrared band of 7700–10,500 nm. The dual-band integrated imaging system can freely switch the observation band to adapt to different scenes and environmental changes. The camera can also further expand its capabilities in the fields of multi-spectral observation and low-light observation by collocation with different detectors. This design is based on a coaxial reflection system, the two bands share the camera’s primary and secondary mirrors, and the separation of the two bands is achieved through a separate field of view design. After simulation, the average Modulation Transfer Function (MTF) value of the visible light band of the system at 50 lp/mm (line pairs per millimeter) reaches 0.45, and the average MTF value of the long-wave infrared band at 50 lp/mm reaches 0.36. In addition, tolerance analysis, ambient temperature analysis and transmittance analysis of the integrated system are carried out in this paper to further improve the integrated system scheme, and the feasibility of the system is further verified.
ISSN:2076-3417
2076-3417
DOI:10.3390/app11209370