Quantity-of-light adjusting device
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United States of America Patent
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Jun 7, 2005
Issued Date -
N/A
app pub date -
Aug 3, 2004
filing date -
Jul 10, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A quantity-of-light adjusting device comprises a first quantity-of-light adjusting blade and a second quantity-of-light adjusting blade which move to adjust quantity of light, and a detecting member which detects that the first quality-of-light adjusting blade is at a predetermined location while also detecting that the second quantity-of-light adjusting member has moved to the predetermined location following the first quantity-of-light adjusting blade moving from the predetermined location, so that the state of adjusting of the aperture with the quantity-of-light adjusting means can be detected by a single detecting member.
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