首页> 外文会议>Conference on Sensors and Their Applications; 20030902-20030904; Limerick; IE >IR Gas Sensors of a Liquid Crystal Type For Environmental Monitoring
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IR Gas Sensors of a Liquid Crystal Type For Environmental Monitoring

机译:用于环境监测的液晶型红外气体传感器

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When one aspires to obtain spectroscopic data about different ingredients in the atmosphere or indoor air a whole arsenal of complicated and cumbersome instruments and refined techniques are necessary. One of the most interesting spectroscopic information is contained in the shapes of spectral bands and the instruments intended to obtain such details must be multichannel or scanning. In that case, the difficulties above grow by many times. Unfortunately, the spectrometric sensors of types known up today have some essential drawbacks that restrict roughly their wide applicability and do them poor-suitable for field, mobile and high-altitude jobs. Those drawbacks are the construction complexity, cumbersome embodiments, difficulty of the control, and (the main) obligatory presence of the moving parts (mirrors, prisms or gratings). Meanwhile, there could be applications where any vibrations caused by moving parts were strictly inadmissible. We propose a new method that combines in some aspects the derivative approach and simplicity of non-scanning instruments. In other words, we developed a method to investigate spectral band shapes without prisms, gratings, interferometers and moving parts in the spectral instruments. An instrument of the type proposed is very small, even miniature. The main element in the instrument (sensor) of the type proposed is a liquid-crystalline cell possessing marked dichroism of optical absorption in some spectral range.
机译:当人们渴望获得有关大气或室内空气中不同成分的光谱数据时,一整套复杂而繁琐的仪器和精致的技术是必要的。最有趣的光谱信息之一包含在光谱带的形状中,旨在获得此类细节的仪器必须是多通道或扫描的。在这种情况下,上述困难会增加很多倍。不幸的是,当今已知类型的光谱传感器具有一些本质上的缺点,这些缺点严重限制了它们的广泛应用,并使它们不太适合野外,移动和高空作业。这些缺点是结构复杂,实施繁琐,控制困难以及运动部件(镜,棱镜或光栅)的(主要)强制性存在。同时,在某些应用中,由于运动部件引起的任何振动都是严格不允许的。我们提出了一种新方法,该方法在某些方面结合了非扫描仪器的衍生方法和简单性。换句话说,我们开发了一种在光谱仪器中没有棱镜,光栅,干涉仪和移动部件的情况下研究光谱带形状的方法。所提出类型的仪器非常小,甚至是微型的。所提出的类型的仪器(传感器)中的主要元素是液晶盒,在某些光谱范围内具有明显的光吸收二色性。

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