Light quantity adjusting device, lens barrel, image pickup...

Details Light quantity adjusting device, lens barrel, image pickup... Light quantity adjusting device, lens barrel, image pickup...

2010-02-18

2011-12-20

Perkey, W. B. (Department: 2862)

Photography

Camera detail

C396S505000

Reexamination Certificate

active

08079764

ABSTRACT:
A light quantity adjusting device includes a plate, an upper diaphragm blade, a lower diaphragm blade, and a diaphragm blade driving unit. The upper diaphragm blade has a semicircular upper main opening and a semicircular upper sub opening. The lower diaphragm blade has a semicircular lower main opening and a semicircular lower sub opening formed. The diaphragm blade driving unit is formed so as to be capable of switching between a state in which a circular main diaphragm opening is formed by the upper main opening and the lower main opening with an optical axis being the center and a state in which a circular sub diaphragm opening that is smaller than the main diaphragm opening is formed by the upper sub opening and the lower sub opening with the optical axis being the center.

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Office Action from Japanese Application No. 2009-047134, dated Nov. 11, 2010.
European Search Report EP 10154121 dated Jun. 15, 2010.

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