Mechanism for driving a diffusion plate of strobe-lights

Details Mechanism for driving a diffusion plate of strobe-lights Mechanism for driving a diffusion plate of strobe-lights

1994-01-21

1995-12-19

Gray, David M.

G03B 1503

Patent

active

054772923

ABSTRACT:
When a distance measured by an AF range finding section is of a predetermined value or thereabove, even if a slide plate is moved in an interlocking relation with a releasing operation of a release button, a gear is locked by the electromagnetic actuator, whereby a diffusion plate is not moved from a position retracted from a strobe, so that an attainable distance of strobe-lights can be extended. On the other hand, when the distance measured by the AF range finding section is of less than the predetermined value, the slide plate is moved in an interlocking relation with the releasing action of the release button and the gear is rotated through a biasing force of a spring, whereby the diffusion plate is positioned in front of the strobe to cover the strobe. Accordingly, the strobe-lights can be reduced in light quantities, so that the optimal exposure can be attained.

REFERENCES:
patent: 2408811 (1946-10-01), Resk
patent: 5126778 (1992-06-01), Wheeler et al.

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