Pyroelectric detector with decreased susceptibility to vibration

Details Pyroelectric detector with decreased susceptibility to vibration Pyroelectric detector with decreased susceptibility to vibration

1976-12-10

1977-11-29

Willis, Davis L.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

G01T 116

Patent

active

040607291

ABSTRACT:
Pyroelectric thermal detector with decreased susceptibility to vibrational noise is formed of a wafer of pyroelectric material having a thin central region supported and surrounded by a thicker rim. On the central region deposited electrodes define active detecting regions that are mirror images of each other across a line separating them. The active regions may be oppositely polarized domains electrically connected in parallel, or a continuous domain with the active regions electrically connected in series opposition. The deposited electrodes are brought out to the rim for external connection. The rim is everywhere spaced at least one thermal diffusion length from either active region. Mechanical support for the wafer is connected to the rim, is symmetrically disposed with respect to the line separating the active detecting regions, and is in contact with the rim over at least 75 percent of its linear extent.

REFERENCES:
patent: 3985685 (1976-10-01), Houlton et al.

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