The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 06, 2001
Filed:
Jan. 13, 2000
Applicant:
Inventors:
Klaus Gnaedig, late of Munich, DE;
Guenther Dausmann, Erding, DE;
Thorstein Halldorsson, Munich, DE;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/32 ;
U.S. Cl.
CPC ...
G02B 5/32 ;
Abstract
The invention concerns a holographic screen for the laser back-projection of at least one or a plurality of laser wavelengths, said holographic screen selectively and diffusely front-scattering the incident narrow-band laser radiation in a predetermined solid angle and simultaneously allowing through the disruptive spectrally broad-band ambient light from the observation area. To that end, the holographic screen comprises at least one holographic transmission grid which is coupled to a light absorber.