Thermal radiation detector

Details Thermal radiation detector Thermal radiation detector

1987-11-16

1989-02-21

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

G01J 520

Patent

active

048067628

ABSTRACT:
A thermal radiation detector suitable for detecting radiation in a given wavelength range, for example 5 to 15 micrometers, includes a detecting element (10), such as a pyroelectric element, and a structure coupled to the element for improving performance by optimizing the absorption characteristic of the detector over a wide wavelength range. The structure comprises two dielectric layers (12 and 18) preceding the detecting element with optical thicknesses substantially one quarter of a selected wavelength in the wavelength range and an intermediate resistive layer (17) for absorbing incident radiation in the wavelength range. A reflective layer (15) is preferably disposed between the element and the adjacent dielectric layer. The dielectric layers may both comprise ZnS or Ge. One layer may comprise a portion of a flexible film used to support the detector.

REFERENCES:
patent: 4704534 (1987-11-01), Turnbull

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