Laser protection window using holographic optical element and ch

Details Laser protection window using holographic optical element and ch Laser protection window using holographic optical element and ch

1990-08-14

1996-12-24

Moskowitz, Nelson

Optical: systems and elements

Absorption filter

Superimposed or series

359 11, 359887, G02B 522, B32B 310

Patent

active

055878474

ABSTRACT:
The present invention is a laser protection window for protection from uncontrolled laser illumination. This laser protection window includes a holographic optical element forming a reflection hologram at the wavelength of the expected laser threat. A set of channel plates opaque to the expected laser threat wavelength are disposed at right angles to the holographic optical element in order to block laser illumination arriving outside the cone of protection of the holographic optical element. These channel plates may be vertically disposed to provide protection against mostly horizontally disposed laser threats. In alternative embodiments, the channel plates include both horizontally and vertically disposed plates or plates disposed in polygonal cross section to cover the entire area of the laser protection window. The ratio of the height to the regular distance between channel plates is selected to block incoming radiation having an angle of incidence outside the cone of protection provided by the holographic optical element. The channel plates may be opaque to all light or be formed of holographic optical elements opaque to the wavelength of the expected laser threat.

REFERENCES:
patent: 3648056 (1972-03-01), Brittewiler et al.
patent: 4586780 (1986-05-01), Chern et al.
patent: 4586781 (1986-05-01), Gunther et al.
patent: 4601533 (1986-07-01), Moss
patent: 4788094 (1988-11-01), Morita
patent: 4830441 (1989-05-01), Chang

Affiliated with

Also associated with

Rating

Laser protection window using holographic optical element and ch does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Laser protection window using holographic optical element and ch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laser protection window using holographic optical element and ch will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1182567