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Patent Searching and Data


Title:
INFRARED RAY CUTOFF FILTER
Document Type and Number:
Japanese Patent JP2003057435
Kind Code:
A
Abstract:

To provide an infrared ray cutoff filter ensuring high light transmission in a visible ray region, applicable to a broad area and having a simple structure, high infrared ray cutoff properties and excellent durability.

The infrared ray cutoff filter is provided with an infrared ray absorbing layer formed by introducing an ionic group to at least one surface of a substrate and combining an infrared ray absorber having a charge to attain bonding with the ionic group. The substrate having the ionic group introduced to the surface is preferably provided with a surface graft polymer having the ionic group introduced by graft polymerization on the surface.


Inventors:
KAWAMURA KOICHI
TAKAHASHI YOSHINORI
Application Number:
JP2001246381A
Publication Date:
February 26, 2003
Filing Date:
August 15, 2001
Export Citation:
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Assignee:
FUJI PHOTO FILM CO LTD
International Classes:
G02B5/22; C08F291/00; C09K3/00; (IPC1-7): G02B5/22; C08F291/00; C09K3/00
Attorney, Agent or Firm:
Atsushi Nakajima (3 outside)