Anticollision system for objective lens in an optical data recor

Details Anticollision system for objective lens in an optical data recor Anticollision system for objective lens in an optical data recor

1992-05-22

1994-02-15

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

369 4425, G01J 120

Patent

active

052869652

ABSTRACT:
An anticollision system for an objective lens for use in an optical data reproducing apparatus. The apparatus is constructed so that the relative distance between the objective lens and a data recording medium is detected, and the objective lens pulled away from the data recording medium to prevent the objective lens from colliding with the data recording medium when the detected relative distance is reduced to a predetermined value or below. Consequently, a collision between the objective lens and the data recording medium can be prevented if the following operation fails or malfunctions.

REFERENCES:
patent: 3974327 (1976-08-01), Van Dijk
patent: 4541084 (1985-09-01), Oku et al.
patent: 4683560 (1987-07-01), Takeuchi et al.

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