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:
Jul. 25, 1989
Filed:
Feb. 12, 1988
Applicant:
Inventor:
Hsuan S Chen, Midland, MI (US);
Assignee:
Saginaw Valley State University, University Center, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ; G03H / ;
U.S. Cl.
CPC ...
350-372 ; 350-383 ;
Abstract
A HOE for use in a wavelength .lambda..sub.3 is made by recording a holographic corrector plate at a wavelength of .lambda..sub.1. The HOE is then recorded at a wavelength .lambda..sub.2. Aberration caused by differences between the wavelength of recording and the wavelength of HOE usage is compensated for by inserting the holographic corrector plate in one of the beams in used in recording the HOE.