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:
May. 01, 1979
Filed:
Oct. 03, 1977
Applicant:
Inventor:
Jacob M Hammer, Plainsboro, NJ (US);
Assignee:
RCA Corporation, New York, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350 9619 ; 350 9634 ;
Abstract
Couplers for coupling achromatic light having wavelengths of blue through red to and from an optical film waveguide along collinear paths parallel with the waveguide. Each coupler is constituted by a prism made of a material which, over the range of wavelengths of interest, has a change in refractive index which differs from the change in refractive index of the waveguide film by less than 0.5 percent of the refractive index of the prism material.