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Optical Engineering

Six band multispectral sensor using off-axis three-mirror reflective optics
Author(s): Kunihiro Tanikawa; Toshihiro Okamura; Hideo Wada; Hiromichi Shirahata
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Paper Abstract

This paper describes design and experimental results for the future airborne multispectral sensor with six bands between visible and infrared regions. The multispectral sensor features single optics using off-axis three-mirror reflective optics to provide same field of views for all six bands and dichroic mirrors to separate the spectral range into six bands. The off-axis three-mirror optics provides an obstruction free FOV with a wide spectral range and high spatial resolution over a wide FOV. The six bands consist of three visible bands, a near infrared band, an MWIR band and an LWIR band. The 10,000 element CCD sensors are used for the three visible bands and the near infrared band. The 960 element HgCdTe linear arrays are used for the MWIR and the LWIR bands. The results of experiments reveal that the ground-base multispectral sensor has a wide spectral range from 0.4 ^m to 10 xm, the wide FOV over 5.7° and the high spatial resolutions of less than 10 xrad for visible and near infrared bands and of less than 104 xrad for the MWIR and the LWIR bands. The overall MTF at the center of the FOV is more than 0.3 at Nyquist frequency for all bands.

Paper Details

Date Published: 1 October 2000
PDF: 8 pages
Opt. Eng. 39(10) doi: 10.1117/1.1290459
Published in: Optical Engineering Volume 39, Issue 10
Show Author Affiliations
Kunihiro Tanikawa, Japan Defense Agency (Japan)
Toshihiro Okamura, Japan Defense Agency (Japan)
Hideo Wada, Japan Defense Agency (Japan)
Hiromichi Shirahata, Japan Defense Agency (Japan)


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