Patent ID: 6853810
Filing Date: 2005-02-08
Classification: G03B

Abstract:
1. A quantity-of-light adjusting device comprising: a first quantity-of-light adjusting blade and a second quantity-of-light adjusting blade which move to adjust quantity of light; a detecting member which detects that said first quantity-of-light adjusting blade is at a predetermined location, and which also detects that said second quantity-of-light adjusting blade has moved to the predetermined location following said first quantity-of-light adjusting blade moving from the predetermined location; and a base plate with an opening formed therein, wherein said first quantity-of-light adjusting blade turns on a first shaft provided on said base plate, and said second quantity-of-light adjusting blade turns on a second shaft provided on said base plate, in a direction opposite the turning of said first quantity-of-light adjusting blade.