Optical apparatus having moving means for protecting an optical

Details Optical apparatus having moving means for protecting an optical Optical apparatus having moving means for protecting an optical

1988-01-25

1989-02-14

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

340705, G09C 302

Patent

active

048048364

ABSTRACT:
The optical apparatus for an automotive vehicle comprises a pivotal casing for accommodating optical elements; a half mirror for partially reflecting light introduced into the apparatus from the outside; a photosensor for detecting light reflected from the half mirror; a controller for generating an actuator signal when the photosensor detects intense light; and a motor or solenoid for moving the pivotal casing in response to the actuator signal to dislocate the optical path of the optical apparatus from the normal optical position to a protective position from intense sunlight. Further, when an ignition switch is connected in series to the controller, it is possible to protect the optical device from external light even when the vehicle is kept parked.

REFERENCES:
patent: 4616226 (1986-10-01), Morley
patent: 4719342 (1988-01-01), Cohn et al.

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