Terrestrial sensor device for satellite or the like
US5585633A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 14, 1995 |
| Grant date | Dec 17, 1996 |
| Priority date | — |
| Expiry date | Aug 14, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The terrestrial sensor device is suitable for use on a satellite or spacecraft. It has a lens for forming an image of the Earth in a focal plane, and a sensor placed in the focal plane. The sensor is constituted by a two-dimensional array of pyroelectric detectors. The device also includes an actuator for oscillating the array in the focal plane, orthogonally to the optical axis of the image-formation lens, at a determined frequency and with an amplitude at least equal to the distribution spacing of the detectors and a processing circuit for acquisition of the output signals of the detectors at the oscillation frequency and for comparison of the output signals with a threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.