Adapter for extracting a portion of an image from an optical system or device
US5742434A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 21, 1996 |
| Grant date | Apr 21, 1998 |
| Priority date | — |
| Expiry date | Nov 21, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/144
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An adapter for an optical eyepiece for propagating a non-collimated light beam from an object along an optical axis of the eyepiece so as to present an image to an observer, the adapter comprising a beam splitter for inserting into the eyepiece so as to intercept the light beam and direct a portion thereof outside the eyepiece through an exit aperture of the beam splitter without substantially changing the image to the observer. The adapter is particularly useful for extracting a portion of an image from an eyepiece having restricted access in a night vision goggles thus permitting an external scene to be recorded simultaneous with its being viewed by the observer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.