Optical Video Recorder Using Tellurium Sub-Oxide Thin Film Disk

Tomio Yoshida; Takeo Ohta; Shunji Ohara

doi:10.1117/12.933373

27 May 1982 Optical Video Recorder Using Tellurium Sub-Oxide Thin Film Disk

Tomio Yoshida, Takeo Ohta, Shunji Ohara

Proceedings Volume 0329, Optical Disk Technology; (1982) https://doi.org/10.1117/12.933373
Event: 1982 Los Angeles Technical Symposium, 1982, Los Angeles, United States

Abstract

A compact optical still video recorder using Te0x(x÷1) thin film disc and a laser diode as the light source has been developed for video signal recording and playback in a real time mode. The recorder is capable of storing up to 15,000 still pictures on one side of a pregrooved disc, 200 mm in diameter with an average random access time of 0.5 seconds for any desired frame. The reflectivity of TeOx thin film recording layer which is deposited on a pregrooved plastic substrate by evaporating Te and TeO2 compound varies with absorption of irradiated thermal energy of focused laser beam. Carrier to noise ratio greater than 55 dB were achieved at incident power level of 7-9 mW, which was focused by an objective lens having numerical aperture (N.A.) of 0.5. Signal to noise ratio of more than 43 dB and resolution of more than 260 TV lines of playback video signal were obtained.

Citation Download Citation

Tomio Yoshida, Takeo Ohta, and Shunji Ohara "Optical Video Recorder Using Tellurium Sub-Oxide Thin Film Disk", Proc. SPIE 0329, Optical Disk Technology, (27 May 1982); https://doi.org/10.1117/12.933373

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