Light controlling apparatus and optical apparatus

Details Light controlling apparatus and optical apparatus Light controlling apparatus and optical apparatus

2011-01-11

2011-01-11

Perkey, W. B. (Department: 2862)

Photography

Camera detail

Diaphragm

Reexamination Certificate

active

07866902

ABSTRACT:
A small-size light controlling apparatus in which, it is not necessary to draw a wire for a diaphragm control, from a diaphragm mechanism, and an optical apparatus in which the light controlling apparatus is used, are provided. The light controlling apparatus includes a substrate having an optical aperture which is fixed, a diaphragm blade which is displaceable, a first magnet which is fixed to the diaphragm blade, and a coil which is disposed around the substrate. An external magnetic field which acts on the first magnet is changed according to an electric power supply to the coil, and the diaphragm blade is displaced by displacing the first magnet according to the change in the external magnetic field.

REFERENCES:
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patent: 5847874 (1998-12-01), Sasao et al.
patent: 6720995 (2004-04-01), Kaneda et al.
patent: 7708478 (2010-05-01), Ryynanen et al.
patent: 2002/0031353 (2002-03-01), Naganuma
patent: 2008/0024654 (2008-01-01), Shinohara
patent: 2005-128450 (2005-05-01), None

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