Invention Grant
- Patent Title: Production process of light amount-adjusting member, light amount-adjusting member, light amount-adjusting device and photographing apparatus
- Patent Title (中): 光量调节构件，光量调节构件，光量调节装置和拍摄装置的制造过程
-
Application No.: US10902150Application Date: 2004-07-30
-
Publication No.: US07189014B2Publication Date: 2007-03-13
- Inventor: Ryuji Katsuragi , Takeshi Miyazaki , Osamu Kanome
- Applicant: Ryuji Katsuragi , Takeshi Miyazaki , Osamu Kanome
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Fitzpatrick, Cella, Harper & Scinto
- Priority: JP2003-205975 20030805; JP2004-206681 20040714
- Main IPC: G03B9/02
- IPC: G03B9/02 ; G02B5/22
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.
Public/Granted literature
Information query
