External optical device for providing multiple optical ports for a gunsight
US5365375A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 19, 1993 |
| Grant date | Nov 15, 1994 |
| Priority date | — |
| Expiry date | Apr 19, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B23/14
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device for providing multiple optical ports on an optical gunsight with a minimum impact on eye relief and which preserves full viewing angle is provided. A housing which includes first and second hinged housing portions is clamped about the circumference of the gunsight. A lens assembly is supported by one of the housing portions having an optical axis in line with the gunsight optical axis. A front lens and aspheric optical distortion lens relay a gunsight image to the beamsplitter. The beamsplitter directs first and second images from a gunsight image along axes which are in line an perpendicular to the gunsight axes. The assembly also includes identical third and fourth lenses which produce images of the gunsight exit pupil along each of these axes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.