Thermal sensor with an improved coating

Details Thermal sensor with an improved coating Thermal sensor with an improved coating

1984-03-30

1986-06-17

Howell, Janice A.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250353, G01J 100

Patent

active

045958327

ABSTRACT:
The disclosure is directed to an apparatus for detecting radiation having wavelengths from about 0.4 .mu.m to about 5.6 .mu.m. An optical coating is applied to a thermal sensor that is normally transparent to radiation with such wavelengths. The optical coating is thin and light and includes a modifier and an absorber. The thermal sensor can be a pyroelectric detector such as strontium barium niobate.

REFERENCES:
patent: 4384207 (1983-05-01), Doctor
patent: 4469943 (1984-09-01), Turnbull
Peterson et al., "Analysis of Response of Pyroelectric Optical Detectors," J. Appl. Phys. 45, 3296 (1974).
Silberg, "Infrared Absorption of Three-Layer Films," J. Opt. Soc. Am. 47, 575, (1957).
Annis et al., "Absorption of Radiation in PLZT Pyroelectric Detectors," Infrared Phys. 14, 199 (1974).
Hilsum, "Infrared Absorption of Thin Metal Films," J. Opt. Soc. Am. 44, 188 (1954).
Hadley et al., "Reflection and Transmission Interference Filters," J. Opt. Soc. Am. 37, 451 (1947), 38 483 (1948).
Harrick et al., "A Thin Film Optical Cavity to Induce Absorption or Thermal Emission," Appl. Opt. 9, 2111 (1970).
Roundy et al. "Subnanosecond Pyroelectric Detector," Appl. Phys. Lett. 21, 512 (1972).

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