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    • 4. 发明申请
    • TUNABLE THIN-FILM FILTER
    • 透明薄膜过滤器
    • WO2011085144A1
    • 2011-07-14
    • PCT/US2011/020438
    • 2011-01-07
    • SEMROCK, INC.WANG, LigangERDOGAN, Turan
    • WANG, LigangERDOGAN, Turan
    • G02B5/28G02B6/293
    • G02B5/286G02B6/29361G02B27/288
    • An optical filter is provided, including a first plurality and second plurality of alternating first and second material layers, where the first plurality of layers is at a first angle to incident light and has a cut-on edge, and the second plurality of layers is at a second angle to the incident light and a cut-off edge; where polarization splitting of the first plurality of layers at the cut-on edge and polarization splitting of the second plurality of layers at the cut-off edge do not exceed approximately 1 percent for any first and second angle between approximately 0 and 40 degrees; and the s-stopband wavelength of the second plurality of layers is approximately less than or equal to the cut-on edge wavelength, which is less than the cut-off edge wavelength, which is approximately less than or equal to the s-stopband wavelength of the first plurality of layers.
    • 提供了一种滤光器,包括第一多个和第二多个交替的第一和第二材料层,其中所述第一多个层与入射光成一定角度并具有切割边缘,并且所述第二多个层是 与入射光和切断边缘成第二角度; 其中所述切割边缘处的所述第一多个层的极化分裂和所述切割边缘处的所述第二多个层的偏振分裂对于大约0和40度之间的任何第一和第二角度不超过约1%; 并且第二多个层的s阻带波长近似小于或等于小于截止边缘波长的切入边缘波长,其大约小于或等于s阻带波长 的第一多个层。