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. 19, 1996
Filed:
Aug. 08, 1994
Ronald A Ferrante, St. Charles, MO (US);
McDonnell Douglas Corp., St. Louis, MO (US);
Abstract
An aircraft head-up display with a combiner using a thin film dielectric reflector with a contoured reflectance spectrum of a narrow bandwidth that matches the spectrum of the light output of a cathode-ray tube whose phosphors produce a narrow bandwidth light output used to create visual data for display to the pilot. The dielectric combiner is constructed with a dielectric coating made up of ion deposited layers, with alternate layers having different indices of refraction and possibly different thicknesses near one quarter wavelength thick. The resultant combiner transmits ambient light essentially without attenuation at all visible light frequencies except those frequencies of the visual data produced by the CRT phosphors, which are reflected into superposition with the background viewable through the combiner.