Quantity-of-light adjusting device using base and blade aperture

Details Quantity-of-light adjusting device using base and blade aperture Quantity-of-light adjusting device using base and blade aperture

1999-03-09

2000-07-11

Gray, David M.

Photography

Camera detail

Shutter

396505, 396508, G03B 1724

Patent

active

06086267&

ABSTRACT:
A quantity-of-light adjusting device includes a drive source, a base member having an opening formed therein, and a blade arranged to move by being driven by the drive source and having three openings formed therein side by side in a row in a moving direction of the blade, wherein, among the three openings formed in the blade, the opening situated in the middle of the row is larger than the opening formed in the base member.

REFERENCES:
patent: 2887028 (1959-05-01), Eburn, Jr.
patent: 5337110 (1994-08-01), Dowe

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