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Title: Thermograph absolute temperature referencing technique

Abstract: An infrared imaging system (thermograph) that electronically forms an optical display of an object as viewed in the infrared portion of the spectrum wherein a given brightness level of the optical image may be set to correspond to a particular object temperature. A reference object (target) within the thermograph is periodically imaged simultaneously with the electronic video circuits being reset to a reference voltage proportional to the absolute temperature of the target. Temperature variations of the target during a period use of the thermograph thus does not affect the brightness level of the optical images, and the optical image brightness becomes a measure of the absolute temperature of the optical image.


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Inventors: Hunt, Robert P. (Menlo Park, CA, US)

Application Number: 447960
Filing Date: 1974-03-04
Publication_date: 1976-01-27
Assignee: Spectrotherm Corporation (Santa Clara, CA)
Primary Class(es): 348/168
Other Classes:
US Patent Ref:
3751586Aug, 1973Johansson178/DIG.
3830970Aug, 1974Hurley et al.178/DIG.

Other Refs:
Primary Examiner: Murray, Richard
Assistant Examiner:
Attorney: Limbach, Limbach & Sutton