Optimization Design of An Infrared Broad-band Long-wave Pass Filter

Optimization Design of An Infrared Broad-band Long-wave Pass Filter

Citation

张佰森 (Zhang Baisen), 陈 焘 (Chen Tao), 熊玉卿 (Xiong Yuqing). 一种长波红外宽光谱长波通滤光片的优化设计 (Optimization Design of An Infrared Broad-band Long-wave Pass Filter) [J]. 沈阳师范大学学报（自然科学版） (Journal of Shenyang Normal University (Natural Science)), 2010, 28(1): 27-29.

Keywords

  • 长波红外 / Long-wave infrared
  • 宽光谱 /Broadband/Wide spectrum
  • 长波通滤光片 /Long-wave pass filter
  • 光学元件 /Optical element
  • 光谱成像技术 / Spectral imaging technology
  • 设计原则 / Design principles
  • 设计方法 / Design method
  • 优化设计 / Optimization design
  • 等效折射率理论 / Equivalent refractive index theory
  • 周期性对称膜系 / Periodic symmetric film system
  • 压缩透射区内波纹幅度 / Compression of transmittance band ripple
  • 部分膜层优化方法 / Partial film layer optimization method
  • 高透射波段 / High transmittance band
  • 平均透射率 / Average transmittance
  • 最低透射率 / Minimum transmittance
  • 截止波段 / Cutoff band
  • 最高透射率 / Maximum transmittance

Brief

This article details the design and optimization of a long-wave infrared broadband long-pass filter using equivalent refractive index theory and a partial film layer optimization method to achieve high transmittance in the passband and low transmittance in the stopband.

Summary

This article focuses on the design and optimization of a long-wave infrared (LWIR) broadband long-pass filter. The researchers used the equivalent refractive index theory and a novel partial film layer optimization method to reduce ripples in the high-transmittance region. The optimized filter achieved an average transmittance greater than 90% (minimum > 85%) in the passband and an average transmittance less than 1% (maximum < 5%) in the stopband. The partial optimization method offers a simpler film structure and easier fabrication compared to fully automatic methods while allowing for spectral adjustments unlike purely analytical approaches.

Origin:

Zurück zum Blog