Laser reflection differential confocal large-radius Measurement

Weiqian Zhao; Xin Zhang; Yun Wang; Lirong Qiu

doi:10.1364/AO.54.009308

Laser reflection differential confocal large-radius Measurement

Weiqian Zhao, Xin Zhang, Yun Wang^*, Lirong Qiu

^*Corresponding author for this work

School of Optics and Photonics

Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

A laser reflection differential confocal large-radius measurement (RDCLRM) method is proposed to meet the requirements of high-precision measurement for a large radius of curvature (ROC). The RDCLRM identifies the converging point of the multiply reflected test beam by using the differential confocal focusing technology. It then measures the distance between the positions of the test lens corresponding to these converging points for different reflection times. Therefore, a precise and high-efficiency measurement of a large ROC is achieved with a shorter measurement lightpath. The theoretical analyses and preliminary experimental results indicate that RDCLRM has a relative expanded uncertainty of better than 0.005% (k = 2).

Original language	English
Pages (from-to)	9308-9314
Number of pages	7
Journal	Applied Optics
Volume	54
Issue number	31
DOIs	https://doi.org/10.1364/AO.54.009308
Publication status	Published - 1 Nov 2015

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title = "Laser reflection differential confocal large-radius Measurement",

abstract = "A laser reflection differential confocal large-radius measurement (RDCLRM) method is proposed to meet the requirements of high-precision measurement for a large radius of curvature (ROC). The RDCLRM identifies the converging point of the multiply reflected test beam by using the differential confocal focusing technology. It then measures the distance between the positions of the test lens corresponding to these converging points for different reflection times. Therefore, a precise and high-efficiency measurement of a large ROC is achieved with a shorter measurement lightpath. The theoretical analyses and preliminary experimental results indicate that RDCLRM has a relative expanded uncertainty of better than 0.005\% (k = 2).",

author = "Weiqian Zhao and Xin Zhang and Yun Wang and Lirong Qiu",

note = "Publisher Copyright: {\textcopyright}2015 Optical Society of America.",

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AU - Zhao, Weiqian

AU - Zhang, Xin

AU - Wang, Yun

AU - Qiu, Lirong

PY - 2015/11/1

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N2 - A laser reflection differential confocal large-radius measurement (RDCLRM) method is proposed to meet the requirements of high-precision measurement for a large radius of curvature (ROC). The RDCLRM identifies the converging point of the multiply reflected test beam by using the differential confocal focusing technology. It then measures the distance between the positions of the test lens corresponding to these converging points for different reflection times. Therefore, a precise and high-efficiency measurement of a large ROC is achieved with a shorter measurement lightpath. The theoretical analyses and preliminary experimental results indicate that RDCLRM has a relative expanded uncertainty of better than 0.005% (k = 2).

AB - A laser reflection differential confocal large-radius measurement (RDCLRM) method is proposed to meet the requirements of high-precision measurement for a large radius of curvature (ROC). The RDCLRM identifies the converging point of the multiply reflected test beam by using the differential confocal focusing technology. It then measures the distance between the positions of the test lens corresponding to these converging points for different reflection times. Therefore, a precise and high-efficiency measurement of a large ROC is achieved with a shorter measurement lightpath. The theoretical analyses and preliminary experimental results indicate that RDCLRM has a relative expanded uncertainty of better than 0.005% (k = 2).

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JO - Applied Optics

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Laser reflection differential confocal large-radius Measurement

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