Pyroelectric IR sensor

Details Pyroelectric IR sensor Pyroelectric IR sensor

1996-11-13

1998-04-14

Wong, Don

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

2503383, 250351, H01L 3700

Patent

active

057395322

ABSTRACT:
A pyroelectric IR sensor equipped with a chopper for opening and closing a shielding plate so that infrared rays emitted from an object are allowed to be incident onto a pyroelectric sensor unit and intercepted therefrom, and having a structure capable of providing a large shielding width for the shielding plate without enlarging the chopper. Piezoelectric members are formed on a thin elastic sheet composed of a planar sheet having a tip to which a shielding plate is attached, except for a partial region which functions to magnify oscillations for enlarging displacement of the shielding plate.

REFERENCES:
patent: 4485305 (1984-11-01), Kuwano et al.
patent: 4631406 (1986-12-01), Nakata
patent: 5058250 (1991-10-01), Turnbull
patent: 5391001 (1995-02-01), Rupert et al.
patent: 5659416 (1997-08-01), Rupert et al.

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