Disc information reproducing apparatus

Details Disc information reproducing apparatus Disc information reproducing apparatus

1987-02-05

1988-09-06

Stephan, Steven L.

Dynamic information storage or retrieval

Miscellaneous

369 43, 369 45, 360137, G11B 2504, G11B 100, G11B 700

Patent

active

047698063

ABSTRACT:
A disc information reproducing apparatus for reproducing information stored on an optical recording medium, the apparatus being subjected to expose to environments of varying temperature which produce condensation moisture in the apparatus. The apparatus includes an optical system for projecting the beam onto the optical recording medium for reflecting and modulating the beam in accordance with the information stored on the optical recording medium, an operating current generating circuit for generating a variable operating current in response to the reflected beam for controlling the optical system, a booster current source for selectively supplying a boasted current larger than the operating current to the optical system for generating heat in the optical system for removing condensation moisture from the apparatus.

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