Apparatus for producing a collimating mark
US5141313A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 21, 1991 |
| Grant date | Aug 25, 1992 |
| Priority date | — |
| Expiry date | Jun 21, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B23/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An apparatus for producing a collimating mark within an optical sighting device includes a light source to generate a beam of light for the mark, imaging optics, and a beam splitter. The beam splitter reflects one portion of the light from the light source into a sighting ray path and directs another portion of light on to a two-dimensional photosensor matrix. From the signals generated by the matrix, the actual position of the collimating mark is determined. A ballistics computer predetermines a set position. Control signals are generated based on an actual position/set position comparison to permit the continuous movement of the collimating mark such that it indicates the elevation and lead angles relative to the optical axis of the sighting device. The signals generated by the photosensor matrix are also used to control the contrast of the collimating mark with respect to its immediate surroundings. Movement of the collimating mark is performed by tilting the imaging optics, displacing the light source, or by rotating wedges about an optical axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.