Laser Filter with High Signal-to-Noise Ratio and Steep Cutoff Edge

Citation

江绍基 [Jiang Shaoji], 陈少飞 [Chen Shaofei], 吕刚宁 [Lü Gangning]. 一种高信噪比和陡截止边缘的激光滤光片 [A Laser Filter with High Signal-to-Noise Ratio and Steep Cutoff Edge].

Keywords

  • 激光滤光片 / Laser filter
  • 高信噪比 /High signal-to-noise ratio
  • 陡截止边缘 / Steep cutoff edge
  • 多半波结构模系 / Multi-half-wave structure mode system
  • 激发滤光片 / Excitation filter
  • 峰值透过率高 / High peak transmittance
  • 一定通带宽度 / Certain passband width
  • 截止度深 / Deep cutoff depth
  • 镀制工艺 / Coating process
  • 矩形波 /Rectangular wave
  • 短波通宽截止带滤光片 / Short-wave pass wide cutoff band filter
  • 通带波纹压缩 / Passband ripple compression
  • 极值法监控 / Extremum method monitoring
  • 膜堆 / Film stack
  • 蓝光透过率高 / High blue light transmittance
  • 反射碘钨灯的发热光谱 / Reflect the heating spectrum of halogen lamps
  • 光固化医疗仪器 / Photocurable medical instruments

Brief

This article discusses the design principles, characteristics, and fabrication process of a laser filter with high peak transmittance, a certain passband width, deep cutoff depth, and a steep cutoff edge, potentially for use in police inspection instruments and outperforming similar domestic filters.

Summary

This article introduces the design and characteristics of two types of optical filters:
First, a high-performance laser filter with a multi-half-wave structure, boasting high peak transmittance, a specific passband, deep cutoff, and a steep cutoff edge, intended for use in police inspection instruments and showing superior performance to similar domestic filters.
Second, a short-wave pass wide cutoff band filter designed using the equivalent layer principle for photocurable medical instruments, which requires high blue light transmittance and the ability to reflect the heating spectrum of halogen lamps. This design aims to compress passband ripples and maintain process feasibility.

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