Invention Grant
- Patent Title: Production process of light amount adjustment member, light amount adjustment device and photographing apparatus
- Patent Title (中): 光量调节构件,光量调节装置和拍摄装置的制作过程
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Application No.: US10872503Application Date: 2004-06-22
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Publication No.: US07070344B2Publication Date: 2006-07-04
- Inventor: Osamu Kanome , Ryuji Katsuragi , Takeshi Miyazaki , Ichiro Onuki , Eriko Namazue , Kohei Watanabe , Akio Kashiwazaki
- Applicant: Osamu Kanome , Ryuji Katsuragi , Takeshi Miyazaki , Ichiro Onuki , Eriko Namazue , Kohei Watanabe , Akio Kashiwazaki
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Fitzpatrick, Cella, Harper & Scinto
- Priority: JP2003-182235 20030626; JP2004-178536 20040616
- Main IPC: G03B9/02
- IPC: G03B9/02

Abstract:
A light amount adjustment member, which causes little deterioration of image quality by diffraction at a grain boundary between ink dots in a colored portion, can be simply produced at low production cost and high yield. The light amount adjustment member has a density distribution such that an optical density varies continuously or stepwise. The process comprises steps of providing a transparent base material having a receptive layer comprised of a material capable of absorbing a coloring liquid and containing a resin and crosslinking agent, applying the coloring liquid to the layer using an ink-jet recording method to form a light amount adjustment region having a particular optical density region, storing the layer under a prescribed environment after application of the coloring liquid to the layer to cause dots formed by the coloring liquid to bleed and crosslinking the resin contained in the layer by the crosslinking agent.
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