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:
Mar. 21, 1995
Filed:
Mar. 17, 1993
Fujitsu Limited, Kawasaki, JP;
Abstract
Regarding a reflected light from any line portion, which is parallel to the longitudinal direction of the alignment mark 11, on the alignment mark 11, the cylindrical lens 33 functions merely as a glass plate, while the cylindrical lens 34 converges the light onto a pixel on the line sensor 35a, performing optical integration and simplifying image processing. Regarding a reflected light from any line portion, which is parallel to the lateral direction of the alignment mark 11, on the alignment mark 11, the cylindrical lens 34 functions merely as a glass plate, while the cylindrical lens 33 magnifies and forms a line image on the line sensor 35a along the pixel row of that. A toroidal lens can be used in place of the cylindrical lenses 33 and 34.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile