Paper
5 December 2011 Mid-wave infrared dual-field-of-view lenses with high ratio for third generation thermal imager
Ronggang Li, Xingde Zhang, Lin Liu
Author Affiliations +
Proceedings Volume 8197, 2011 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments; 819715 (2011) https://doi.org/10.1117/12.905869
Event: International Conference on Optical Instruments and Technology (OIT2011), 2011, Beijing, Beijing, China
Abstract
A Dual-field-of-view (DFOV) lenses has been developed, which is for MWIR band with high ratio used by 3rd generation thermal imager. The lenses change the field of view by flipping in or out a group of optical elements. The lenses' ratio of DFOV is six, the focal length of narrow field is 240 millimeter, F-number is 4. As a result of smaller pixel size, the lenses have to provide high image quality. It is folded to get smaller volume. Because the detector contains cold stop and the lenses contains moveable group, narcissus is examined and minimized. Reference source is set at a suitable position to correct non-uniform of detector. Field stop is set at the first image surface to minimize stray light. The lenses improve thermal imager spatial resolution by micro-scanning which is realized by jiggling motion of the last element at two directions.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ronggang Li, Xingde Zhang, and Lin Liu "Mid-wave infrared dual-field-of-view lenses with high ratio for third generation thermal imager", Proc. SPIE 8197, 2011 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 819715 (5 December 2011); https://doi.org/10.1117/12.905869
Advertisement
Advertisement
RIGHTS & PERMISSIONS
Get copyright permission  Get copyright permission on Copyright Marketplace
KEYWORDS
Lenses

Thermography

Sensors

Modulation transfer functions

Zoom lenses

Mid-IR

Image quality

RELATED CONTENT

Design of an ultra compact 5 piece high ratio MWIR...
Proceedings of SPIE (March 27 2022)
Optical design study and prototyping of a dual field zoom...
Proceedings of SPIE (September 03 2015)
Novel fast catadioptric objective with wide field of view
Proceedings of SPIE (August 18 2010)
Zoom Lenses For The Thermal Infrared
Proceedings of SPIE (October 26 1983)
Diffractive optics at Eastman Kodak Company
Proceedings of SPIE (May 07 1996)

Back to Top