Title: Optical system for thermal imager

Abstract: An infrared chopper device for use with a starting thermal imaging system, uch as a pyroelectric vidicon, is provided which utilizes liquid crystal technology.

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Inventors: Bly, Vincent T. (Alexandria, VA, US)

Application Number: 717080
Filing Date: 1976-08-24
Publication_date: 1977-09-27
Assignee: The United States of America as represented by the Secretary of the Army (Washington, DC)
Primary Class(es): 250/331 250/333, 250/351, 349/1
Other Classes:
US Patent Ref:

3829684	Aug, 1974	Assouline et al.	250/331.
3832033	Aug, 1974	Furuhata et al.	250/331.
3936640	Feb, 1976	Haas et al.	250/331.

Other Refs:
Primary Examiner: Borchelt, Archie R.
Assistant Examiner:
Attorney: Edelberg; Nathan, Holford; John E., Gibson; Robert P.