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. 10, 1994
Filed:
Apr. 01, 1993
Applicant:
Inventor:
Bimsara Disanayaka, London, CA;
Assignee:
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01T / ; G03G / ;
U.S. Cl.
CPC ...
250591 ; 250580 ;
Abstract
A layered imaging stack for minimizing interference fringes in an imaging device. A polymer layer has one flat surface and a second opposed surface that has a surface roughness, R.sub.A, within the range of 0.5 .mu.m to 2.5 .mu.m. An adhesive layer provided on the roughened surface of the polymer layer has an index of refraction, n.sub.2, which differs from the refractive index, n.sub.1, of the polymer layer by at least 0.02. The multiplicative product of R.sub.A in .mu.m and the absolute value of n.sub.2 -n.sub.1, .DELTA.n, is within the range of from about 0.01 to 0.05.