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:
Jan. 13, 1981
Filed:
Aug. 20, 1979
William T Fearnside, Victor, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
Frame-rate converting film scanning apparatus capable of scanning film (having frame location indicia) projected at any speed, selected from within a range of speeds, to produce a television signal having a standard field rate is disclosed. The scanning apparatus is of the type employing a solid-state line sensor for scanning a projected image of the film in a direction generally perpendicular to the length of the film and a rotating multifacet mirror to displace the projected image relative to the line sensor for effecting a raster scan of a film frame to produce a standard television signal. The apparatus includes a frame position sensor responsive to a frame-rate converted image of the frame location indicia for producing a frame location signal. The speed of rotation of the mirror is controlled by a phase locked loop servo that employs a standard television vertical synchronization signal as a reference and receives the frame location signal as a feedback signal. The speed of rotation of the mirror is controlled by the phase locked loop such that the frame location signal and the vertical synchronization signal are in phase, thereby insuring proper frame-rate conversion regardless of the film projection speed.