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High-precision Photogrammetric Surface Figure Measurements under Cryogenic Environment
Lou Zheng; Qian Yuan; Fan Shenghong; Liu Changru; Wang Hairen; Zuo Yingxi; Cheng Jingquan; Yang Ji
2016
发表期刊Acta Astronomica Sinica
卷号57期号:1页码:115-124
摘要Limited by the working temperature of the measurement equipments, most of the high-precision surface figure measurement techniques cannot be applied under a cryogenic environment. This paper reports the first attempt to measure the surface figure of a high-precision terahertz reflector panel under low temperatures based on photogrammetry. The measurement employs a high resolution industrial camera sitting on an automatic experimental platform which enables photos been taken in an automatic fashion inside a climate chamber. A repeatable accuracy of 2.1 mum rms is achieved under the cryogenic environment. Furthermore, surface figure measured by a three-coordinate measuring machine under room temperature is used to calibrate the thickness variation of the paper targets. By this technique, the surface figure of an aluminum prototype panel of the 5 meter Dome A Terahertz Telescope (DATE5) is measured from room temperature down to 55°C.
DOI0001-5245(2016)57:1<115:JYSZSY>2.0.TX;2-D
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文献类型期刊论文
条目标识符http://libir.pmo.ac.cn/handle/332002/16822
专题毫米波和亚毫米波技术实验室
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Lou Zheng,Qian Yuan,Fan Shenghong,et al. High-precision Photogrammetric Surface Figure Measurements under Cryogenic Environment[J]. Acta Astronomica Sinica,2016,57(1):115-124.
APA Lou Zheng.,Qian Yuan.,Fan Shenghong.,Liu Changru.,Wang Hairen.,...&Yang Ji.(2016).High-precision Photogrammetric Surface Figure Measurements under Cryogenic Environment.Acta Astronomica Sinica,57(1),115-124.
MLA Lou Zheng,et al."High-precision Photogrammetric Surface Figure Measurements under Cryogenic Environment".Acta Astronomica Sinica 57.1(2016):115-124.
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