SBIR Phase I: Efficient Multi-Spectral Holographic Filters

SBIR 第一阶段：高效多光谱全息滤光片

• 批准号: 0338906
• 负责人: Christophe Moser
• 金额: $ 9.95万
• 依托单位: ONDAX INC
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-01-01 至 2004-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0338906&HistoricalAwards=false
• 关键词: SBIR; Phase; Efficient; Multi; Spectral

This Small Business Innovation Research (SBIR) Phase I Project proposes to develop the fabrication technology for an astronomical holographic multi-spectral filter that increases the signal to noise ratio (SNR) of ground-based observations at near-infrared wavelengths by suppressing the narrow lines emitted from atmospheric OH radicals. Many astronomers have recognized that large gains in SNR can be obtained if the OH background could be suppressed. SNR is proportional to the diameter of the telescope. The potential threefold gain in SNR achieved by adding the proposed filter to the Keck 10 meter telescope would thus be equivalent to increasing its diameter to 30 meters, which is estimated to cost five hundred million dollars. In contrast, the cost of the proposed efficient multi-spectral filters is three orders of magnitude less.This project should have a direct impact on applications requiring fine multi-spectral information for accurate substance identification in remote sensing and life sciences. In remote sensing, the design and fabrication of arbitrary narrow multi-band filter profile are powerful tools for global measurements of atmospheric gases of Earth and other planets as well as remote sensing of toxic gases for Homeland Security. The spectral response of the holographic filter can be tailored to match precisely the absorption spectrum of given gases with high sensitivity. With multiple absorption or emission peaks detected simultaneously, the detection sensitivity will be increased greatly compared with traditional methods, and the required data volumes will decrease by several orders of magnitude, which makes it very attractive for remote sensing applications.

该小型企业创新研究（SBIR）第一阶段项目提出开发天文全息多光谱滤波器的制造技术，通过抑制大气OH自由基发射的窄线来提高近红外波长地面观测的信噪比（SNR）。许多天文学家已经认识到，如果能够抑制OH背景，就可以获得SNR的大幅增益。SNR与望远镜的直径成正比。因此，通过在凯克10米望远镜上增加拟议的滤波器，信噪比可能增加三倍，相当于将其直径增加到30米，估计耗资5亿美元。相比之下，所提出的高效多光谱滤波器的成本是三个数量级以下。该项目应具有直接影响的应用程序，需要精细的多光谱信息，在遥感和生命科学的准确物质识别。 在遥感领域，任意窄多波段滤波器剖面的设计和制作是地球和其他行星大气气体全球测量以及国土安全有毒气体遥感的有力工具。全息滤波器的光谱响应可以被定制为精确地匹配具有高灵敏度的给定气体的吸收光谱。与传统方法相比，多吸收峰或发射峰同时探测，探测灵敏度将大大提高，所需数据量将减少几个数量级，这使得它在遥感应用中具有很大的吸引力。