Design of cubic-prism bandpass filters

Citation

顾培夫 [GU Peifu], 艾曼灵 [AI Manlin]. 一种立方棱镜带通滤光片的设计 [Design of cubic-prism bandpass filters]. 光学仪器 [Optical Instruments], 2015, 37(3): 199-204.

Keywords

• 立方棱镜 / Cubic prism
• 带通滤光片 / Bandpass filter
• 偏振分离 / Polarization separation
• s偏振光 / s-polarized light
• p偏振光 / p-polarized light
• 通带透射率 / Passband transmittance
• 偏振位相差 / Polarization phase difference
• 多层膜 / Multilayer film
• 光学薄膜 / Optical coatings
• 高折射率薄膜 / High refractive index film - H
• 中折射率薄膜 / Medium refractive index film - M
• 低折射率薄膜 / Low refractive index film - L
• 反射镜 / Reflector
• 嵌入式多个带通滤光片 / Embedded multiple bandpass filters
• 光学导纳 / Optical admittance
• 投影显示 / Projection display
• 光通讯 / Optical communication
• 膜厚优化 / Film thickness optimization
• 基本周期数 / Basic period number
• 滤光片的周期数 / Filter period number
• 间隔层 / Spacer layer
• 单腔带通滤光片 / Single-cavity bandpass filter
• 玻璃 (Glass) / K9 玻璃棱镜 / K9 glass prism
• 截止度 / Extinction ratio / Cutoff depth
• 半宽 / Half width / Bandwidth
• 透射分光曲线 / Transmittance spectrum
• 色散 / Dispersion

Brief

This article proposes a design method for cubic prism bandpass filters using three materials and embedded structures to reduce s- and p-polarization separation and improve passband transmittance.

Summary

This article presents a novel design for bandpass filters in cubic prisms that utilizes three different refractive index materials arranged in an embedded multilayer structure. This approach aims to reduce the polarization separation between s- and p-polarized light, thereby improving the overall transmittance and minimizing the polarization phase difference within the filter's passband. The design allows for adjustment of the filter's bandwidth and is applicable to various glass refractive indices and potentially to flat plate filters as well.

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