Active night vision thermal control system using...

Details Active night vision thermal control system using... Active night vision thermal control system using...

2007-09-30

2009-10-27

Porta, David P (Department: 2884)

Radiant energy

Infrared-to-visible imaging

Reexamination Certificate

active

07608822

ABSTRACT:
A thermal control system (11) for a light source (46) of a vision system (10) includes a heater (63) that is thermally coupled to the light source (46). A thermal sensor (60) is thermally coupled to the light source (46) and generates a temperature signal. A controller (50) is coupled to the heater (63) and to the thermal sensor (60) . The controller (50) operates the heater (63) when the temperature signal is below a maximum temperature limit. The minimum and maximum temperature limits are obtained from the light-source wavelength-temperature characteristic.

REFERENCES:
patent: 5646399 (1997-07-01), Fukushima et al.
patent: 5801830 (1998-09-01), Seago et al.
patent: 6888661 (2005-05-01), Islam et al.

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