Laser radiation detector using polyvinylidene fluoride film

Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive

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G01J 502

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active

049068490

ABSTRACT:
The present invention is a pyroelectric radiation detector using a polyvinylidene fluoride film (PVDF) as the sensitive material and having graphite in contact with one side of the film. The detector can have a planar or a conical cavity configuration. The sensitivity of this detector is in the range of 5 to 10 V/J, and the response time is shorter than 0.5 ms. This detector can be used to directly detect pulse laser radiation within a spectral range of 0.25 .mu.m to 25 .mu.m and having a power density as high as 100 MW/cm.sup.2. The detector is also suitable for other light radiations ranging from violet to infrared wavelength. It can be used, for example, as an infrared detector, as a radiation sensor for measuring temperature, as a detector for a standard radiation meter, and as a light trap for the equivalent black body absorption.

REFERENCES:
patent: 3772518 (1973-11-01), Murayama et al.
patent: 4467202 (1984-08-01), Nakamura et al.
patent: 4547456 (1985-10-01), Kojima et al.
Blevin et al., "Infrared Reflectometry with a Cavity-Shaped Pyroelectric Detector", App. Phys. 13, 10, Oct. 1974, 2212-2217.

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