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Proceedings Paper

Optical design of multi-spectral optical system for infrared camera
Author(s): Tianjin Tang
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Paper Abstract

This paper studies about the multi-spectral imaging system and describes the design of dual-channel mirror-lens optical system with wide-field for multi-spectral sensor. Combined with the secondary imaging technology, it achieves the one hundred percent cold stop efficiency. Off-axis three-mirror reflective optics is adopted to provide an obstructive field of view and high spatial resolution over the wide-field, which is also shared by two channels. Independent relay lens are employed not only to extract the real exit-pupil matched with the cold shield, but also adjust the multiplication factors for infrared. The dichroic mirror and filters subdivide the wide spectral range into four bands, including mid-wavelength band and long-wavelength band. Each corresponds to respective field. The result shows that the Modulation Transfer Function of each band at respective fields is near the diffraction limit, which satisfies the needs of practical applications. The wavefront of the off-axis three-mirror reflective optics is also satisfactory, which is beneficial to the later alignment and measurement.

Paper Details

Date Published: 5 August 2015
PDF: 7 pages
Proc. SPIE 9618, 2015 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 96180J (5 August 2015); doi: 10.1117/12.2191488
Show Author Affiliations
Tianjin Tang, Beijing Institute of Space Mechanics and Electricity (China)


Published in SPIE Proceedings Vol. 9618:
2015 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments
Yongtian Wang; Xiaodi Tan; Kimio Tatsuno, Editor(s)

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