Infrared detector subarray with integral optical filter
US5138164A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 15, 1991 |
| Grant date | Aug 11, 1992 |
| Priority date | — |
| Expiry date | Jul 15, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F77/413
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An infrared detector subarray having an integral filter assembly is comprised of a plurality of stacked modules defining an infrared detector focal plane subarray; a filter plate sized and configured to correspond to the infrared detector subarray; and a plurality of supports disposed intermediate the filter plate and the detector subarray for attaching the filter plate to the subarray such that the filter plate is in close proximity to the detector subarray. Scattering and crossstalk are minimized by positioning the filter plate in close proximity to the detector subarray. The supports may comprise planar members having a thickness of less than approximately 0.003 inch such that they may be disposed intermediate adjacent modules. The filter plate may further comprise a plurality of parallel stripes, each parallel stripe transmitting infrared radiation of a different frequency than that transmitted by adjacent stripes such that a focal plane array comprised thereof may be sensitive to infrared radiation at a plurality of frequencies. Forming the filter as an integral part of the subarrays eliminates the need to fabricate a single filter having a diameter of two feet or more. The in…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.