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:
Aug. 16, 1988
Filed:
Sep. 16, 1986
Applicant:
Inventor:
Robert B Wood, Hillsboro, OR (US);
Assignee:
Flight Dynamics, Inc., Portland, OR (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ;
U.S. Cl.
CPC ...
350320 ; 350-37 ; 350-372 ; 350174 ;
Abstract
A method of preventing a reduction in image contrast in a head-up display. The head-up display is comprised of a visual information source, a lens, a wavelength selective reflecting element, and a combiner which reflects at least some of the wavelengths from the information source which reflect off the reflecting element. The reflecting element, in addition to being wavelength selective, is provided with optical power to reduce aberrations which would otherwise result from operating the combiner at an off-axis angle.