Radiant energy – Infrared-to-visible imaging – Including liquid crystal detector
Patent
1985-08-07
1987-06-02
Corbin, John K.
Radiant energy
Infrared-to-visible imaging
Including liquid crystal detector
350 11, 350351, 358113, G02F 113, H04N 533
Patent
active
046706542
ABSTRACT:
A thermal image is created in a thermostatically controlled liquid crystal cell (4) containing a two-frequency nematic or cholesteric (3). This is addressed with an alternating potential whose frequency can be swept through the cross-over frequency. By appropriate choice of frequency within this range the thermal image is converted to a phase image which in its turn is converted to a contrast image in conventional manner.
REFERENCES:
patent: 3335716 (1967-08-01), Alt
patent: 4009934 (1977-03-01), Goodwin et al.
patent: 4031529 (1977-06-01), Borel et al.
patent: 4114991 (1978-09-01), Bleha et al.
patent: 4533215 (1985-08-01), Trias et al.
patent: 4578584 (1986-03-01), Baumann et al.
patent: 4589732 (1986-05-01), Shiraishi et al.
Grinberg et al, "Visible to Infrared Image Converter for Dynamic Infrared Target Simulation Applications", SPIE, vol. 226, Infrared Imaging Systems Technology, 1980, pp. 129-132.
Berreman, "Electrical and Optical Properties of Twisted Nematic Structure", Nonemissive Electrooptic Displays ed., Kmetz et al., Plenum Press, 1976, pp. 10 & 11.
Corbin John K.
Lewis David
Standard Telephone and Cables Public Limited Company
LandOfFree
Thermal image sensor with means for converting a phase image int does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Thermal image sensor with means for converting a phase image int, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermal image sensor with means for converting a phase image int will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-615760