Thin-film interference filters illuminated by tilted apertures

被引：2
|
作者：
Goossens, Thomas [1 ,2 ]
Van Hoof, Chris [1 ,2 ]
机构：
[1] Katholieke Univ Leuven, Dept Elect Engn, B-3001 Leuven, Belgium
[2] IMEC VZW, Kapeldreef 75, B-3001 Leuven, Belgium
来源：
APPLIED OPTICS | 2020年 / 59卷 / 05期
关键词：
SPECTRAL CAMERAS;
D O I：
10.1364/AO.59.00A112
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Thin-film interference filters can be illuminated by a circular aperture at different angles. Each situation produces a different transmittance spectrum. We present an analytical model that, for small tilt angles, predicts the change in transmittance for an arbitrary position of the filter in three-dimensional space. The model is extended to take into account higher-order harmonics. We also derive a formula to predict the change in central wavelength, and we validate our results by comparison with thin-film transfer-matrix calculations. A key property of our approach is that the model can be combined with empirical data to predict the transmittance without knowing the filter design. (C) 2019 Optical Society of America
引用
收藏
页码：A112 / A122
页数：11
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