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PARTICLE DETECTING SYSTEM USING BROWNIAN MOTION EMISSION
PARTICLE DETECTING SYSTEM USING BROWNIAN MOTION EMISSION
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机译：利用布朗运动发射的颗粒物检测系统
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1483815 Analyzing submicron particles BLOCK ENG Inc 10 Sept 1974 [27 Sept 1973 19 Aug 1974] 39374/74 Heading G1A In a system for analyzing submicron particles in a fluid medium, light from a source 22 passes along a cell 20 by total internal reflection, a sample 30 placed on a surface of the cell is subjected to an evanescent wave formed by the total internal reflection and the resulting intensity modulation is frequency analyzed. The modulation is generated by Brownian movement, the rate of which is related to size. -The source light is preferably mono-chromatic, and may be of a wavelength to excite fluorescence in the particles if they are suitably starred. The internal reflection angle and angle of incidence on the cell inlet surface 28 may be altered by mirror 28. The cell must be made of a material of higher refractive index than the medium 30, generally suitable materials being crown or flint glass, quartz, silica and synthetic organic polymers such as polystyrene and polymethylmethacrylate. The light output is preferably detected using a microscope with its object plane in the region of the medium traversed by the evanescent wave. The resulting output may be beam split, filtered, detected and the resulting electrical signals amplified and frequency analyzed.
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机译：1483815分析亚微米颗粒BLOCK ENG Inc 1974年9月10日[1973年9月27日1974年8月19日] 39374/74标题G1A在分析流体介质中亚微米颗粒的系统中，来自光源22的光通过全内反射沿着单元20穿过，放置在单元表面上的样品30经受由全内反射形成的van逝波，并对得到的强度调制进行频率分析。调制是通过布朗运动生成的，其速率与大小有关。 -源光优选是单色的，并且可以具有激发颗粒中的荧光的波长，如果它们被适当地加星标的话。镜28可以改变内部反射角和在池入口表面28上的入射角。池必须由具有比介质30更高的折射率的材料制成，通常合适的材料是冠玻璃或火石玻璃，石英，二氧化硅以及合成有机聚合物，例如聚苯乙烯和聚甲基丙烯酸甲酯。优选使用显微镜以其物平面在plane逝波穿过的介质区域中检测光输出。所得的输出可以被光束分离，滤波，检测并且所得的电信号被放大和频率被分析。
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