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. 17, 1987
Filed:
Feb. 26, 1986
Applicant:
Inventors:
Richard K Howard, Chatham, GB;
Colin K Marshall, Gravesend, GB;
Assignee:
GEC Avionics Limited, , GB;
Primary Examiner:
Int. Cl.
CPC ...
G03H / ;
U.S. Cl.
CPC ...
350-365 ; 350-37 ; 350320 ;
Abstract
A method and apparatus for making reflection holograms wherein a film (27) of light sensitive material in which the hologram is to be formed is rotated about a first axis (Y--Y) which is itself rotated about a second axis (X--X) which intersects the first axis at a position (Z) spaced from the film so that a coherent light beam (29), which is directed onto the film and whose axis passes through the point of intersection of the axes, scans the film in a pattern of overlapping narrow bands. The bands may be rectilinear or circular.