Optical element of a parallax free sight
US5440387A · kind A · utility
12Cited by
10References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1994 |
| Grant date | Aug 8, 1995 |
| Priority date | — |
| Expiry date | Apr 28, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B23/105
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A parallax free sight has an optical element, preferably arranged at one end of an elongated light channel. A concave side thereof is parabolically shaped and provided with a partially reflecting layer, in the focal point of which is arranged a light emitting means. The element is moulded in one piece of a plastic material, preferably polycarbonate, and an opposite, convex side is elliptically or hyperbolically shaped, such that any light beam hitting it from the outside continues straight through it with minimal deviation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.