Accession Number : ADA037832


Title :   Development of an Optical Disc Recorder


Descriptive Note : Quarterly technical rept. 1 Oct-31 Dec 1976


Corporate Author : PHILIPS LABS BRIARCLIFF MANOR NY


Personal Author(s) : Kennedy, George ; Zernike, F ; Lou, D ; Harper, Robert ; Giebler, M


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a037832.pdf


Report Date : Feb 1977


Pagination or Media Count : 72


Abstract : Several air sandwich discs were fabricated and recordings made with them. Tellurium was chosen as the best material of those considered. Studies show that tellurium films are twice as sensitive as bismuth films and are quite resistant to high-temperature degradations. Micron-size pits were recorded in a tellurium film at 2 Mbits/sec with a 25mW He-Ne laser. Extensive tests and evaluations of focus motors and the air bearing sled indicate that an acceptable focus motor and sled can now be integrated into the recorder. Two types of air bearing turntables are now available, including one assembled from standard U.S. manufactured parts. A Miller modulator/demodulator of digital information was designed, built and successfully tested. A study and computer simulation of the modulator/demodulator is presented.


Descriptors :   *OPTICAL STORAGE , *RECORDING SYSTEMS , BISMUTH , DEMODULATORS , FILMS , LASERS , MODULATORS , PROTECTION , SUBSTRATES , TELLURIUM


Subject Categories : Recording and Playback Devices


Distribution Statement : APPROVED FOR PUBLIC RELEASE