Integrated filter and grating in an aiming sight
US9482803B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 2014 |
| Grant date | Nov 1, 2016 |
| Priority date | — |
| Expiry date | Jul 4, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2223/23
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A holographic sight is provided having a housing that includes a plurality of holograph sight components. A laser diode mounted in the housing is configured to emit a laser light beam. The light beam is transmitted to an integrated diffraction grating and filter unit which includes a grating and a filter in a single device. The diffraction grating has a grating surface for diffracting the light beam and also diffracting unwanted ambient light transmitted into the housing. The filter is an optical filter contacting at least a portion of the grating. The optical filter is adapted to absorb at least one wavelength of the ambient light to inhibit the ambient light from diffracting into a visible spectrum that might otherwise be viewable to a user looking into the holographic sight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.