Measuring parallelism of two parallel narrow beams based on differential defocusing principle

Zhengang Lu; Miaomiao Li; Tao Zheng; Lei Wang; Jiubin Tan

doi:10.1364/OE.24.015854

Measuring parallelism of two parallel narrow beams based on differential defocusing principle

Zhengang Lu
, Miaomiao Li
, Tao Zheng
, Lei Wang
, Jiubin Tan

School of Instrumentation Science and Engineering

Harbin Institute of Technology

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

4 Scopus citations

Abstract

We present a method of measuring the parallelism of two parallel narrow beams by positioning a CCD each before and after the focal plane of the collimation lens. Because of this differential defocused positioning of the two CCDs, the two beam spots cannot overlap on the CCD image plane even if they are nearly parallel, and the distance between the two spots on each CCD can be obtained simultaneously, which eliminates the influence of environmental noise. Our experimental results show that a satisfactory system stability and resolution of 0.1″ and 0.2″, respectively, can be obtained with the proposed method.

Original language	English
Pages (from-to)	15854-15862
Number of pages	9
Journal	Optics Express
Volume	24
Issue number	14
DOIs	https://doi.org/10.1364/OE.24.015854
State	Published - 11 Jul 2016

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title = "Measuring parallelism of two parallel narrow beams based on differential defocusing principle",

abstract = "We present a method of measuring the parallelism of two parallel narrow beams by positioning a CCD each before and after the focal plane of the collimation lens. Because of this differential defocused positioning of the two CCDs, the two beam spots cannot overlap on the CCD image plane even if they are nearly parallel, and the distance between the two spots on each CCD can be obtained simultaneously, which eliminates the influence of environmental noise. Our experimental results show that a satisfactory system stability and resolution of 0.1″ and 0.2″, respectively, can be obtained with the proposed method.",

author = "Zhengang Lu and Miaomiao Li and Tao Zheng and Lei Wang and Jiubin Tan",

note = "Publisher Copyright: {\textcopyright}2016 Optical Society of America.",

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AU - Lu, Zhengang

AU - Li, Miaomiao

AU - Zheng, Tao

AU - Wang, Lei

AU - Tan, Jiubin

PY - 2016/7/11

Y1 - 2016/7/11

N2 - We present a method of measuring the parallelism of two parallel narrow beams by positioning a CCD each before and after the focal plane of the collimation lens. Because of this differential defocused positioning of the two CCDs, the two beam spots cannot overlap on the CCD image plane even if they are nearly parallel, and the distance between the two spots on each CCD can be obtained simultaneously, which eliminates the influence of environmental noise. Our experimental results show that a satisfactory system stability and resolution of 0.1″ and 0.2″, respectively, can be obtained with the proposed method.

AB - We present a method of measuring the parallelism of two parallel narrow beams by positioning a CCD each before and after the focal plane of the collimation lens. Because of this differential defocused positioning of the two CCDs, the two beam spots cannot overlap on the CCD image plane even if they are nearly parallel, and the distance between the two spots on each CCD can be obtained simultaneously, which eliminates the influence of environmental noise. Our experimental results show that a satisfactory system stability and resolution of 0.1″ and 0.2″, respectively, can be obtained with the proposed method.

UR - https://www.scopus.com/pages/publications/84979703378

U2 - 10.1364/OE.24.015854

DO - 10.1364/OE.24.015854

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VL - 24

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JO - Optics Express

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ER -

Measuring parallelism of two parallel narrow beams based on differential defocusing principle

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