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. 02, 2010
Filed:
Sep. 06, 2007
Applicant:
Andreas Loew, Gross-Gerau, DE;
Inventor:
Andreas Loew, Gross-Gerau, DE;
Assignee:
DFT Digital Film Technology Holding GmbH, Weiterstadt, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01N 21/86 (2006.01); H04N 5/253 (2006.01);
U.S. Cl.
CPC ...
Abstract
A detection apparatus for detecting perforation holes of a cinematographic film comprises at least one light source, at least one scanning sensor, which is arranged so as to receive light emitted by the light source after interaction with a perforation zone of the film, and an evaluation circuit for detecting, by means of an output signal of the scanning sensor, when an edge of a perforation hole passes through between light source and scanning sensor. The light source emits light which is polarized with a first polarization and the scanning sensor is sensitive selectively to light with a second polarization.