title: Acoustooptic traveling-wave transcription signal recording based on two-beam interference.
abstract: A novel technique of wideband signal recording has been developed for the optical video disk. An FM videoband signal is carried by a traveling acoustic wave in the form of AM modulation through an acoustic medium under continuous laser illumination and transcribed optically onto a synchronously moving photosensitive medium. As the recording frequency bandwidth is not restricted by the laser beam diameter basically, a wideband recording system with large depth of focus can be established by using the large beam diameter. Wideband recording up to 18 MHz (1-microm record pitch) is experimentally verified using As-Se-S-Ge chalcogenide glass as a high resolution recording medium.
authors.forename: A
authors.initials: A
authors.lastname: Ishii
authors.forename: M
authors.initials: M
authors.lastname: Yamamoto