Shutter device

Details Shutter device Shutter device

1990-09-12

1991-05-28

Hix, L. T.

354250, G03B 940

Patent

active

050198475

ABSTRACT:
A focal-plane shutter device comprises aperture opening blades including a blade with an edge for forming an exposure slit, aperture closing blades including a blade with an edge for forming the exposure slit, first and second base plates disposed between the aperture opening blades and the aperture closing blades and each having an aperture for forming an exposure aperture, and a means for spacing the first and second base plates by a predetermined distance. According to the above composition, even is the slit forming edge of the blade of the aperture closing blades is moved at high speed, it is prevented from colliding with the first and second base plates.

REFERENCES:
patent: 4493544 (1985-01-01), Uematsu
patent: 4660952 (1987-04-01), Toyoda et al.
patent: 4926202 (1990-05-01), Fukuda et al.

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