Optical Absorption of Pure Water in the Blue and Ultraviolet

纯水在蓝色和紫外光中的光吸收

• 批准号: 0099242
• 负责人: Edward Fry
• 金额: $ 34.43万
• 依托单位: Texas A&M Research Foundation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-03-15 至 2006-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0099242&HistoricalAwards=false
• 关键词: Optical; Absorption; Pure; Water; Blue

This ocean science technology development project builds on previous work developing instrumentation to measure light scattering and absorption in ocean water. These variables are critical in determining the optical properties of the oceans, which has great applicability in making in situ measurements and in remote sensing of oceanic surface waters. Absorption is especially problematic, but newly developed instrumentation for such measurements has obtained reliable data in the spectral range of 380 nm to 700 nm. using isotropic illumination of the sample in an integrating cavity. The goals of this project are: (1) to extend the capabilities of this previous instrumentation and make measurements in the ultraviolet spectral region in the 320 nm to 380-nm range; (2) to investigate the apparent fact that contact of ultra-pure water with glass and quartz leads to increased absorption of the ultra-pure water in the blue to near ultraviolet range; (3) to measure and improve the accuracy of the absorption coefficients in the important UV-C and UV-B spectral regions (specifically 240 nm to 320-nm); (4) to build and test a large spherical integrating cavity to provide higher accuracy in the absorption measurements at the minimum of pure water absorption; and (5) to study, build, and test a long tubular form of the integrating cavity with the objective of an in situ device.

这一海洋科学技术发展项目建立在以前开发测量海水中光散射和吸收的仪器的工作基础上。 这些变量对于确定海洋的光学特性至关重要，而海洋的光学特性在进行现场测量和对海洋表面沃茨进行遥感方面具有很大的适用性。吸收是特别成问题的，但是新开发的用于这种测量的仪器已经在380 nm至700 nm的光谱范围内获得了可靠的数据。使用积分腔中样品的各向同性照明。 该项目的目标是：（1）扩展以前仪器的能力，并在320 nm至380 nm范围内的紫外光谱区进行测量;（2）调查超纯水与玻璃和石英接触导致超纯水在蓝色至近紫外范围内吸收增加的明显事实;（3）在重要的UV-C和UV-B光谱区测量和提高吸收系数的精度（特别是240 nm至320 nm）;（4）构建和测试大的球形积分腔，以在纯水吸收最小的情况下提供更高的吸收测量精度;以及（5）研究、构建和测试具有原位装置的目的的长管状形式的积分腔。