Circuit for optically coupling a cryobenic detector array with processing circuitry and for increasing the dynamic range of detection
US5440139A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 2, 1994 |
| Grant date | Aug 8, 1995 |
| Priority date | — |
| Expiry date | Mar 2, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for communicating a signal representative of an infrared detector element's output to electrically and thermally isolated signal processing circuitry utilizes the steps of: varying the reflectivity of a photoreflective cell in response to the output of the infrared detector element such that the reflectivity of the photoreflective cell is representative thereof; resetting the photoreflective cell when the reflectivity thereof reaches a predetermined value; optically scanning the photoreflective cell with an optical scanner which is electrically and thermally isolated from the photoreflective cell; and counting the number of times the photoreflective cell is reset so as to provide a signal representative of the infrared detector element's output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.