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. 01, 1984
Filed:
Dec. 28, 1982
Applicant:
Inventor:
A David Boccuti, Cambridge, MA (US);
Assignee:
Polaroid Corporation, Cambridge, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354437 ; 354458 ; 354480 ;
Abstract
An encoding system for a shutter blade arrangement of the scanning type comprising a plurality of spaced apart slits in each of the shutter blade elements arranged to sequentially overlap each other between a source of illumination and a photoresponsive element during displacement of the shutter blade elements to provide an output waveform indicative of the instantaneous position of the shutter blade elements with double the resolution or accuracy heretofore provided by shutter blade encoding systems having identically sized and spaced slits.