Pyroelectric infrared detector and driving method therefor
US5021660A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1989 |
| Grant date | Jun 4, 1991 |
| Priority date | — |
| Expiry date | Nov 3, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/191
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
In a pyroelectric infrared detector, there is provided a member having a slit positioned in front of an array of pyroelectric elements, which interrupts an infrared image which is incident on the pyroelectric element array, and respective pyroelectric elements forming a row of the pyroelectric element array are wired so that they are connected in series electrically and adjacent pyroelectric element generate counter-electromotive forces. An infrared image irradiated on respective pyroelectric elements is scanned successively by the movement of the slit member along a row of the pyroelectric element array, thus obtaining information relating to an infrared intensity distribution from a heat source which emits IR rays which are being irradiated onto respective pyroelectric elements, from time series signals produced at both ends of the pyroelectric element array.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.