1989-06-19
1990-05-01
Gellner, Michael L.
G03B 902
Patent
active
049222740
ABSTRACT:
A motor-driven type exposure adjusting device, such as a diaphragm-shutter device, adapted for a lens incorporating camera, an interchangeable lens, or the like. In the adjusting device, a rotary member has an optical path hole formed in a central portion thereof and is arranged to control the opening and closing actions of a plurality of light shielding blades. A stepping motor servers as a drive source for the rotation of the roatary member and is disposed outside of the optical path hole, and an aperture position detecting means detects a boundary between a given maximum aperture position defined by the light shielding blades and a stopped-down aperture position of the optical path hole. The aperture position of the optical path hole is detected through the rotating angle position of a rotary wheel to which the rotation output of the rotor shaft of the stepping motor is transmitted.
REFERENCES:
patent: 4460253 (1984-07-01), Kawai et al.
patent: 4589750 (1986-05-01), Tomori et al.
patent: 4681417 (1987-07-01), Fujimo et al.
patent: 4695144 (1987-09-01), Yoshino et al.
patent: 4695145 (1987-09-01), Kawamoto
patent: 4763150 (1988-08-01), Sumi
Ando Takehiko
Arai Tadashi
Nishimura Masachika
Seino Hiroaki
Suzuki Ryuji
Canon Kabushiki Kaisha/Canon Denshi Kabushiki Kaisha
Gellner Michael L.
LandOfFree
Motor driven exposure adjusting device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Motor driven exposure adjusting device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Motor driven exposure adjusting device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-832976