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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.:

US 5029255 B1

PDFFull Text
Date of Patent:
Jul. 02, 1991

Filed:

Dec. 13, 1989

Optical scanning device including mirror objective having two windows at

Applicant:
Inventors:

Willem G Opheij, Eindhoven, NL;

Josephus J Braat, Eindhoven, NL;

Johannes J Baalbergen, Eindhoven, NL;

Alexius J Van Sambeeck, Eindhoven, NL;

Assignee:

U.S. Philips Corporation, New York, NY (US);

Attorney:

Treacy; David R.

Primary Examiner:

David C Nelms

Assistant Examiner:

K Shami

Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
250216 ; 2502015 ;
Abstract

An optical scanning device is described with a mirror-objective (30) arranged between a radiation source (40) and an object (10) to be scanned, which mirror objective comprises two radiation windows (31, 34) and two reflectors (32, 33). By giving one of the windows (31, 34) an aspherical shape, the mirror objective is well corrected for spherical aberrations, while no stringent requirements need to be imposed on the accuracy of the shape of the aspherical surface (35).

Find Patent Forward Citations

Opheij, Willem. (1991). Optical scanning device including mirror objective having two windows at (U.S. Patent No. 5029255). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5029255

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