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:
Sep. 05, 1989
Filed:
Mar. 19, 1987
Applicant:
Inventor:
Richard K Howard, Chatham, GB;
Assignee:
GEC Avionics Limited, , GB;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03H / ;
U.S. Cl.
CPC ...
350-365 ; 350-37 ; 350-371 ;
Abstract
A method of producing a reflection hologram wherein light from a source (29) is directed onto the hologram recording medium (23) via a lens (21) which causes light reaching the medium (23) to pass through a construction point (33). The light beam is arranged where it is incident on the lens (21) to be of small cross-sectional area compared with the lens aperture and is arranged to scan over the lens aperture so that the beam scans the medium (23) in a regular pattern of overlapping narrow bands. In this way the hologram may be made to have uniform spectral properties despite a non-uniform energy distribution in the beam.