Compact flir optical configuration
US5936771A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1997 |
| Grant date | Aug 10, 1999 |
| Priority date | — |
| Expiry date | Jul 31, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/644
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A FLIR system having a refractive FLIR optical configuration including a substantially spherical housing and an optical window disposed in and extending to the outer housing surface. The window aperture diameter exceeds the housing radius and is a near dome-shaped, relatively high dispersive negative lens forming a part of the FLIR optical system and is disposed adjacent a positive relatively low dispersive lens. A first optical system extends to a first housing window for receiving light and is within a hemispherical housing portion comprises an afocal lens system of a first pair of lenses, one lens disposed at a housing wall, a first mirror disposed within the hemisphere and reflecting light passing through the first pair of lenses, a second mirror for receiving the light reflected from the first mirror and reflecting the light along a path parallel to the light impinging upon the first mirror and a further plurality of lenses for transmission of the light reflected from the second mirror. The light reflected from the first mirror preferably is reflected in a direction normal to the light impinging upon the first mirror. A second window is disposed at the housing surface and a se…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.