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:
Jan. 11, 1988
Applicant:
Inventor:
Ronald J Straayer, South Windsor, CT (US);
Assignee:
The Gerber Scientific Instrument Company, South Windsor, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
250201 ; 354-4 ; 356358 ;
Abstract
A novel method and apparatus for improving the overall accuracy and repeatability of an optical photoplotter which is characterized by a controller which determines an image position error from interferometric feedback signals and position command signals and subsequently provides displacement of the image in dependence thereon.