发明授权
- 专利标题： Production process of light amount-adjusting member, light amount-adjusting member, light amount-adjusting device and photographing apparatus
- 专利标题（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
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申请号： US10902150申请日： 2004-07-30
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公开(公告)号： US07189014B2公开(公告)日： 2007-03-13
- 发明人: Ryuji Katsuragi , Takeshi Miyazaki , Osamu Kanome
- 申请人： Ryuji Katsuragi , Takeshi Miyazaki , Osamu Kanome
- 申请人地址： JP Tokyo
- 专利权人： Canon Kabushiki Kaisha
- 当前专利权人： Canon Kabushiki Kaisha
- 当前专利权人地址： JP Tokyo
- 代理机构： Fitzpatrick, Cella, Harper & Scinto
- 优先权： JP2003-205975 20030805; JP2004-206681 20040714
- 主分类号： G03B9/02
- IPC分类号： G03B9/02 ; G02B5/22
摘要：
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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