Optical Rectifier Type Patents (Class 352/105)
  • Patent number: 8009929
    Abstract: A digital camera includes a tri-axial acceleration sensor. The CPU determines a direction of the camera at a time of image capturing, on the basis of a gravitational direction which is detected by the tri-axial acceleration sensor, calculates a parameter for projection-correcting a captured image in a predetermined direction on the basis of the direction of the camera, and corrects a distortion of the captured image by using the parameter.
    Type: Grant
    Filed: July 25, 2006
    Date of Patent: August 30, 2011
    Assignee: Casio Computer Co., Ltd.
    Inventor: Keiichi Sakurai
  • Patent number: 7513628
    Abstract: An apparatus, system, and method for a projection device having a camera to provide for adjustments based at least in part on a series of captured images are disclosed herein.
    Type: Grant
    Filed: November 17, 2005
    Date of Patent: April 7, 2009
    Assignee: Infocus Corporation
    Inventor: Maarten Niesten
  • Patent number: 6877864
    Abstract: Projector has projection optical system for projecting an image onto a projection surface and optical zoom mechanism for actuating projection optical system to enlarge and reduce the image projected onto the projection surface. Projector also has distortion correcting circuit for correcting distorted quadrilateral projected images, which are projected onto the projection surface along an optical axis that is oblique vertically and horizontally to the projection surface, into respective square corrected images, zoom setting detector for detecting a zoom setting of optical zoom mechanism, and CPU for generating corrective data to be set in distortion correcting circuit based on the zoom setting detected by zoom setting detector.
    Type: Grant
    Filed: February 27, 2004
    Date of Patent: April 12, 2005
    Assignee: NEC Viewtechnology, Ltd.
    Inventors: Youichi Tamura, Youichi Itaki
  • Patent number: 6844912
    Abstract: The invention relates to an optical system for the rotation of images taken by a film camera about an optical axis, having a controller device for the rotation of images with an adjusting motor and a position sensor for recording the rotation angle of the image-rotating optical system. In addition, the possibility of displacing the optical system in at least one axial direction is provided.
    Type: Grant
    Filed: May 16, 2001
    Date of Patent: January 18, 2005
    Assignee: Arnold & Richter Cine Technik GmbH & Co. Betriebs KG
    Inventors: Pavel Filous, Walter Trauninger, Michael Haubmann
  • Patent number: 6014198
    Abstract: The invention refers to a method of shortening the closure time of shutters in cinema projectors of the type in which film is intermittently advanced one frame at a time into registry with an image window in the projector, and wherein each time the film is advanced a shutter in the projector closes the image window during the time that the film is being advanced. According to the invention, an optical compensation of the film motion is effected by determining the rate at which each image of the film begins and ends, respectively, its advance into registry with the image window of the projector, generating a control signal proportionate to the rate, and positioning between the image window and the associated projection screen a movable plane-parallel plate which is adjsuted by the control signal to shorten the closure time of the image window during each film advance, thereby to increase the luminous efficiency factor of the projector.
    Type: Grant
    Filed: May 27, 1997
    Date of Patent: January 11, 2000
    Assignee: Raytheon Anschutz G.m.b.H.
    Inventor: Hans Baumann
  • Patent number: 5153733
    Abstract: A film scanner is disclosed which comprises a dynamic film gate. The film gate includes a pair of capstans for supporting the film at an imaging station and a pair of belts which clamp the film against the capstans. The capstans are driven to advance the film through the imaging station.
    Type: Grant
    Filed: July 27, 1990
    Date of Patent: October 6, 1992
    Assignee: Eastman Kodak Company
    Inventors: Clyde L. Fetterman, Fiscella Marcello D.
  • Patent number: 5088812
    Abstract: A high-frequency movie camera has a sprocket wheel for supporting and transporting of a film. A rotating prism is positioned opposite to the perimeter of the sprocket wheel and is driven by the combination of a gear located on the sprocket wheel shaft and a pinion intermeshing with the gear and attached to the rotating prism shaft. In order to avoid moves caused by the necessary clearance between the gear and pinion, an electromagnetic brake is positioned on the rotating prism shaft, which is automatically controlled to limit the prism rotational speed.
    Type: Grant
    Filed: March 22, 1991
    Date of Patent: February 18, 1992
    Assignee: Dedo Weigert Film GmbH
    Inventor: Dedo Weigert
  • Patent number: 4126386
    Abstract: An optical scanner system such as a projector for the continuous transmission of images to provide image immobilization is provided. The optical scanner system includes an illumination system, a scanner mechanism, and a projection lens system. The scanner mechanism is capable of creating virtual images of successive film frames with at least one virtual image point of each film frame positioned on a stationary locus point and at least another virtual image point offset from the stationary image locus point and relatively movable during a scanning movement. The scanner mechanism can, for example, be of a reflective or refractive polygon geometry. The specific parameters of the projection lens system and illumination system recognizes the inherent limitations of the dynamic keystoning aberration in scanner assemblies and seeks to nullify its effect in the projected real image. The projection means is of a telecentric design.
    Type: Grant
    Filed: October 17, 1977
    Date of Patent: November 21, 1978
    Inventor: Ulrich M. Fritzler
  • Patent number: 4113367
    Abstract: The present invention provides a multifaceted reflecting polygon scanner system that is suitable for incorporation into a projector, camera, or other optical scanning or image immobilizing apparatus. The rotating reflecting optical system of the present invention, is capable of being combined with a continuous film transport to produce an overlap frame dissolve of sequential frames for optical immobilization of a projected image. The present invention includes a primary roof reflecting polygon, a secondary reflecting polygon, and an image surface. By proper choice of the polygon parameters and their juxtaposition relative to the image surface, the present invention uniquely provides a significantly higher relative aperture with minimal kinetic aberrations such as dynamic keystone distortion and minimal static aberrations. In one embodiment, a pair of roof reflectors of a 60.degree. and 90.degree.
    Type: Grant
    Filed: September 9, 1976
    Date of Patent: September 12, 1978
    Assignee: Ulrich M. Fritzler
    Inventor: Ulrich M. Fritzler