| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing an ND filter which have less cracks, improve uniformity of light quantity, are capable of dealing with high image quality and have flat spectral characteristics at each density, and to provide the ND filter, and a light quantity adjusting device and a camera having the ND filters. SOLUTION: In this method for manufacturing ND filters, a plurality of stepwise optical density distributions are formed by stacking films consisting of at least two or more kinds of layers stacked on a substrate onto the same transparent member to change the amount of transmitted light. A single density layer consisting of the above films and having a larger stacking area is formed on one face of the member, and a two-density layer of a smaller stacking area is formed on the opposite face of the member. COPYRIGHT: (C)2004,JPO
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