Infrared detection system
US4225786A · kind A · utility
32Cited by
4References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 15, 1978 |
| Grant date | Sep 30, 1980 |
| Priority date | — |
| Expiry date | Sep 15, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S250/01
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An infrared radiation intruder detection system is disclosed which employs a unique pyroelectric detector array. The array comprises a pyroelectric plastic film having electrodes arranged on opposing surfaces to define a plurality of heat-sensitive capacitors connected in parallel. According to a preferred embodiment, the film of selected detector elements is poled to a polarity opposite that of the other elements to cause internal cancellation of signals due to events which affect an even number of detectors simultaneously.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.