Optical viewing instrument for attachment to a gunsight eyepiece
US5442483A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 17, 1993 |
| Grant date | Aug 15, 1995 |
| Priority date | — |
| Expiry date | Sep 17, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/144
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Optical device for coupling to an optical gunsight. A housing supports an optical assembly in line with the axis of the gunsight. The optical assembly includes an optical plate adjacent the gunsight exit pupil which is in contact with a beamsplitter. The beamsplitter includes first and second prisms having diagonal surfaces abutting one another and including a semi-reflective coating. An optical coating is placed on surfaces of the prisms adjacent the diagonal, to provide for a continuous light transmissivity through the beamsplitter optical plate combination. A relay lens is a located along a folded axis provided by the beamsplitter. The relay lens includes a prism for folding the folded axis a second time, so that the image is reinverted and reoriented right to left. A camera is coupled to the relay lens for monitoring the relayed image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.