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:
Oct. 23, 1990
Filed:
Aug. 14, 1989
Applicant:
Inventors:
John A Van Hoogstrate, St. Peters, MO (US);
Richard A Buchroeder, Tucson, AZ (US);
Assignee:
McDonnell Douglas Corporation, St. Louis, MO (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
353 31 ; 353122 ; 350311 ; 350437 ;
Abstract
An optical projection system is provided wherein a light valve supplies an aperture consisting of spatially separate colors for projection by a plurality of projection lenses to a projection plane. A color correction lens is placed at a selective pupil of the projection system wherein microscopic amounts of selective power are applied to at least one of the spatially seperated colors of the image at the selected pupil to cause a shift of the wavelength to bring all the wavelengths of the spatially separate colors to a common focus.