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. 26, 1998
Filed:
Feb. 21, 1997
Applicant:
Inventor:
Josephus J Braat, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
2504922 ;
Abstract
An imaging system with at least one reflective surface for forming an image by means of ultraviolet radiation, the reflective surface being provided with a correction layer which is transparent to the wavelength of the radiation used. This layer compensates for phase differences caused by deviations of form of the reflective surfaces. The correction layer has a refractive index which differs only slightly from 1, so that the requirements imposed as regards the precision of the surface of the transparent layer are significantly less severe than for the reflective layer.