Device for cleaning the laser lens of a compact disc player

Details Device for cleaning the laser lens of a compact disc player Device for cleaning the laser lens of a compact disc player

1988-12-16

1992-02-11

Levy, Stuart S.

Dynamic information storage or retrieval

With stylus cleaning or treatment

369 72, 369292, 15246, 15405, G11B 358, G11B 502, G11B 510, G11B 2320

Patent

active

050880837

ABSTRACT:
A laser lens cleaner and cleaning method for a compact-disc playing machine having a turntable-like compact-disc support, a laser-reading device with a laser lens facing the reflective playing surface of a compact disc, a motor for rotating the compact-disc support, and a control circuit for receiving instructions from a compact disc or a cleaning disc relative to rotating and stopping the compact-disc support. The cleaning disc is the same size as a compact disc for the playing machine. It has a reflective lower surface with a cleaning brush projecting out downwardly therefrom for contacting the laser lens. The cleaning disc also has digital, electrically coded data providing a portion containing instructions for the control circuit. The instructions instruct the control circuit via the laser lens what to do during rotation of the cleaning disc and to stop the cleaning disc when the laser lens has been cleaned. The instruction are inaudible to a person, but are read by and acted on by the control circuit to give the running time to clean the laser lens. The cleaning disc may have some irregular surface features for setting up air currents during rotation of the cleaning disc to clean the laser lens even when the brush does not touch the laser lens. The surface features may comprise an air vent through the cleaning disc or a brush-like member too short to touch the lens.

REFERENCES:
patent: 4594617 (1986-06-01), Tezuka
patent: 4817075 (1989-03-01), Kikudin et al.
patent: 4817078 (1989-03-01), Iwata

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