Production process of light amount-adjusting member, light...

Details Production process of light amount-adjusting member, light... Production process of light amount-adjusting member, light...

2007-03-13

2007-03-13

Perkey, W. B. (Department: 2851)

Photography

Camera detail

Diaphragm

C359S888000

Reexamination Certificate

active

10902150

ABSTRACT:
A process for producing a light amount-adjusting member, such as an ND filter, that comprises the steps of providing a transparent base material and a coloring liquid; and applying a coloring liquid to the base material by ejecting the coloring liquid to the base material to form a colored portion having a specified optical density, wherein the coloring liquid contains at least one coloring material of with a maximum absorption wavelength in a range of 630 to 750 nm, when measured on the transparent base material.

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