Motor driven diaphragm apparatus for lens barrel

Details Motor driven diaphragm apparatus for lens barrel Motor driven diaphragm apparatus for lens barrel

1997-12-09

1999-07-20

Dang, Hung Xuan

Optical: systems and elements

Lens

With variable magnification

359694, G02B 1514

Patent

active

059263245

ABSTRACT:
A motor-driven diaphragm apparatus for a lens barrel having a plurality of lens groups and a diaphragm mechanism, in which a diaphragm block provided with a plurality of diaphragm blades and a diaphragm-opening-and-closing ring which opens and closes an aperture defined by the diaphragm blades, is integrally provided with a diaphragm-opening-and-closing arm that projects from the diaphragm block and that is provided with a radial association groove for the diaphragm-opening-and-closing ring. Also provided are front and rear lens barrel blocks which support the lens groups, wherein said diaphragm block is held between the front and rear lens barrel blocks so that the diaphragm-opening-and-closing arm and the association groove project outwardly.

REFERENCES:
patent: 5724194 (1998-03-01), Ishikawa

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