利用计算全息光栅产生的涡旋光测量物体变形

doi:10.3976/j.issn.1002-4026.2017.02.010

Abstract

Abstract:

The outofplane displacement can be measured by using a vortex beam, Laguerre Gaussian (LG) beam, produced by computergenerated hologram (CGH) grating. Based on the principle of using the computergenerated hologram (CGH) grating to produce LG beam, the experimental scheme of the outofplane deformation measurement was designed, using the LG beam as reference light and a plane beam as object light. The object deformation was measured by the interference of object light and reference light, and the interference beam intensity formula before and after the tested object deformed was derived. Adopting the method of numerical calculation, the principle of using LG beam for the measurement of object deformation was analyzed. The numerical simulation results were in agreement with the theoretical results, which showed that by the high purity LG beam produced by CGH grating can be used for outofplane displacement measurement.

Key words: Laguerre Gaussian beam, interference, deformation measurement, phase shift

CLC Number:

O438

SHI Kai, ZHANG Xin-yu, SUN Ping. Measurement of object deformation using vortex beams generated by a computergenerated hologram grating[J].SHANDONG SCIENCE, 2017, 30(2): 61-66.

References

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Measurement of object deformation using vortex beams generated by a computergenerated hologram grating

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