发明名称 |
Polarizing filter and optical device using the same |
摘要 |
<p>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. <IMAGE></p> |
申请公布号 |
EP1184687(A2) |
申请公布日期 |
2002.03.06 |
申请号 |
EP20010120651 |
申请日期 |
2001.08.30 |
申请人 |
NIPPON SHEET GLASS CO., LTD. |
发明人 |
MURAGUCHI, ISAO;KUNISADA, TERUFUSA;SEKIGUCHI, YUKINARI |
分类号 |
G02B5/30;(IPC1-7):G02B5/30;G02B27/28;G02B1/10 |
主分类号 |
G02B5/30 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|