Optical aiming device
US5953165A · kind A · utility
6Cited by
7References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 17, 1998 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | Mar 17, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical aiming device including two optical elements, each characterized by a refractive index and a critical angle defining a total internal reflection plane, positioned one in front of the other substantially along an aiming axis, each optical element causing a portion of light impinging thereon at an angle greater than the critical angle, to be reflected, thereby defining a demarcation between a region of reflected light and non-reflected light, the optical elements being oriented such that the demarcations of each optical element intersect at a point lying substantially along the aiming axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.