Laser Beam Recorder Research Articles

The Videodisk as a Means of Transferring a Video Picture onto Motion-Picture Film

An enumeration is made of the diverse procedures that can be used for the transfer to film of video images coming from diverse original sources. The difficulties of kinescope recording, such as the need for very fast pull-down and shutter-closed periods and the shortcomings of recordings from a single shadow-mask color tube or from triplets of filtered monochrome tubes are briefly mentioned. The basics of direct electron-beam recording on film in a vacuum, as devised by the 3M Company, are succinctly described. Also described are the principles of laser-beam recording on film, a concept developed by CBS. The difficulties arising from the different frame rates established by European and US television standards and from the further different frame-rate standard for motion-picture film are analyzed and exemplified. A new approach to video-to-film transfer is then proposed, namely, the use of the videodisk as a source for this purpose. Greater flexibility is achieved, as the videodisk may be scanned in a number of free-style modes (freeze frame, jump, reverse, etc.), thus permitting easy matching of frame rates, shutter-closed times, and frame suppression where needed. It is concluded that the mechanical complications inherent to tape-to-film transfer are greatly reduced when using the videodisk as a source.

Laser beam recording of video master disks

A method for real time recording of video information on a disk by means of a laser beam is described. The laser beam is focused on a rotating substrate, covered with a thin film of positive photoresist. During exposure the laser beam is intensity modulated by means of an electrooptic modulator driven by the encoded video signal. After etching away the exposed areas of photoresist a master disk is obtained with pits, containing the video information in their periodicity and length. Such a master disk will serve as the source for generating submasters, stampers, etc. for the production of a large number of replicas as is usually done in the phonograph record industry.

Direct Laser-Beam Recording of Color Television Signals on Color Print Film

Direct Laser-Beam Recording of Color Television Signals on Color Print Film

画像情報の記録再生と表示技術

画像情報の記録再生と表示技術

LASER BEAM INFORMATION SCANNING AND RECORDING

Annals of the New York Academy of SciencesVolume 267, Issue 1 p. 384-410 LASER BEAM INFORMATION SCANNING AND RECORDING Scanning and Recording Leo Beiser, Leo Beiser EPSCO Labs* Wilton, Connecticut 06897Search for more papers by this author Leo Beiser, Leo Beiser EPSCO Labs* Wilton, Connecticut 06897Search for more papers by this author First published: January 1976 https://doi.org/10.1111/j.1749-6632.1976.tb41623.xCitations: 1 Formerly Government & Industrial Division of CBS Laboratories, Stamford, CT. AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Citing Literature Volume267, Issue1Third Conference on the LaserJanuary 1976Pages 384-410 RelatedInformation

Correction of axial deflection errors in rotating mirror systems

In laser beam recording systems, axial deflection errors of a polygon mirror give rise to banding patterns which recur with each scanner rotation. Experiments for compensating such errors by an additional deflection of the light beam are discussed. An economic solution was achieved by simultaneously using the acousto-optic modulator already included in the setup as a compensating deflector.

Color or Multispectral Laser Recording on Black and White Film

Color-encoded images can be recorded on black-and-white film through the use of synthetically generated diffraction gratings. This technique has applications in the display and interpretation of multispectral information generated by airborne or spaceborne line scan sensors and color scanners in facsimile systems. A color facsimile system based on this principle has been implemented using a white light color transparency scanner and a laser beam recorder. In system tests, good color recognition, 20-line pair/millimeter resolution, and 7, grey level steps have been achieved.

Laser-Beam Recording on a Magnetic Film

A method of recording digital information on a thin magnetic film is described. The change of magnetization in the film is accomplished by a coincidence of a high-power optical beam from a laser and a magnetic field. Films having coercive force ratios Hc(25°C)/Hc(150°C) of at least 3 were used as the media. Information was recorded with a 1 W Argon-Ion laser beam controlled by an electrooptic switch to provide spots down to 3.5μ diam. Photographs and electrical readout of tracks of written bits are presented.