发明名称 |
Polarizing filter and optical device using the same |
摘要 |
A polarizing filter has a laminate structure: wherein one to four layers of first dielectric thin films 1 and one to four layers of second dielectric thin films 2 are alternately laminated on a transparent flat substrate 10 to form the laminate structure, the layers of second dielectric thin films 2 having a refractive index lower than that of the first dielectric thin films 1 with respect to the wavelength of incident light; wherein one layer of the third dielectric thin film 3 having a refractive index intermediate between the refractive indices of the first and second dielectric thin films with respect to the wavelength of incident light is laminated on a surface of the laminate structure. In an optical device using the polarizing filter, the angle of incidence is set to be in a range of from 20 to 70 degrees.
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申请公布号 |
US2005041291(A1) |
申请公布日期 |
2005.02.24 |
申请号 |
US20040946316 |
申请日期 |
2004.09.22 |
申请人 |
MURAGUCHI ISAO;KUNISADA TERUFUSA;SEKIGUCHI YUKINARI |
发明人 |
MURAGUCHI ISAO;KUNISADA TERUFUSA;SEKIGUCHI YUKINARI |
分类号 |
G02B5/30;(IPC1-7):G02B5/30;G02B27/28 |
主分类号 |
G02B5/30 |
代理机构 |
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主权项 |
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