LIGHT AMOUNT ADJUSTMENT APPARATUS

Title:

LIGHT AMOUNT ADJUSTMENT APPARATUS

Document Type and Number:

Japanese Patent JP2003315870

Kind Code:

A

Abstract:

To provide a light amount adjustment apparatus that has a light amount adjustment member in which positional shift of an ND filter does not occur and a shape of the ND filter has a degree of freedom despite of an unitary constitution of an optical filter with a diaphragm blade and which can be manufactured through a single process, the apparatus that has superior optical properties, is reducible in size on the whole, and attains the low product cost.

The light amount adjustment apparatus for adjusting the state of luminous flux passing through an aperture part having a specified aperture diameter has the light amount adjustment member having a 1st region where specified transmissivity is imparted to luminous flux and a 2nd region for blocking the luminous flux on the same base material, the 1st region and 2nd region being formed of films containing coloring matters formed by using a micro droplet discharge apparatus.

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Inventors:

NAMAZUE EIRISHI
ONUKI ICHIRO
MIYAZAKI TAKESHI
KASHIWAZAKI AKIO
YASHIMA MASATAKA

Application Number:

JP2002365744A

Publication Date:

November 06, 2003

Filing Date:

December 17, 2002

Export Citation:

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Assignee:

CANON KK

International Classes:

G02B5/00; G03B9/02; G03B11/00; (IPC1-7): G03B9/02; G02B5/00; G03B11/00

Attorney, Agent or Firm:

Katsuhiro Yoshida (1 person outside)

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