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	Optical device and method for measuring velocity
	HANSON, VAGN STEEN GRUNER; JACOBSEN, MICHAEL LINDE
著作权人	FORSKNINGSCENTER RISO
专利号	AU2002363260A1
国家	澳大利亚
文献子类	发明申请
其他题名	Optical device and method for measuring velocity
英文摘要	In the field of non-intrusive velocity measurement, a device and a method for measuring the velocity of objects, particles or fluid flow is provided. The device comprises transmitter means (1) comprising at least one linear array (101) of surface emitting light sources (102x), said light sources (102) being arranged in a linear configuration spaced apart by a predetermined separation distance (d) an optical system (103-105) including at least one imaging lens directing the substantially coherent electromagnetic radiation (10) emitted from the light sources (102) into a measurement region in a predetermined manner producing an array of fringes or spots (4) spaced apart with a predetermined fringe distance ( LAMBDA ) corresponding to the separation distance (d) between the light sources (102), receiver means (2) comprising light manipulating means (202, 203) directing the electromagnetic radiation (20) scattered from the measurement region to detection means including at least one detector (201, 204, 205) detecting the scattered electromagnetic radiation (20) from the measurement region as an object (3) passes through the measurement region, detector processing means processing the detected signaIs from the detector means corresponding to the particle(s) and surface (3) passing the fringes (4) in the measurement region. According to the invention, the surface emitting light sources are Yertical Cavity Surface Emitting Laserdiodes (VCSEL). Hereby, a low power consumption is achieved just as a reliable and simple light source is provided resulting in a robust non-intrusive velocity measurement system.
公开日期	2003-05-12
申请日期	2002-10-08
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/44235]
专题	半导体激光器专利数据库
作者单位	FORSKNINGSCENTER RISO
推荐引用方式 GB/T 7714	HANSON, VAGN STEEN GRUNER,JACOBSEN, MICHAEL LINDE. Optical device and method for measuring velocity. AU2002363260A1.

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