Refractive index measurement by fiber point diffraction longitudinal shearing interferometry

Lingfeng Chen*, Xiaofei Guo, Jinjian Hao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

A refractive index measurement method by measuring the longitudinal displacement of a point light source (PLS) after passing through a plane-parallel-plate sample is proposed. The displacement is derived by applying two point-diffraction longitudinal shearing interferometric measurements if the distance from the PLS to the exit pupil is predetermined. With two fibers to simulate the ideal PLS, an experimental system for solid and liquid sample tests is proposed to verify the principle. The experimental results indicate that its accuracy is in the order of 10-4. Ways to improve the accuracy are discussed based on the detailed error analysis.

Original languageEnglish
Pages (from-to)3655-3661
Number of pages7
JournalApplied Optics
Volume52
Issue number16
DOIs
Publication statusPublished - 1 Jun 2013

Fingerprint

Dive into the research topics of 'Refractive index measurement by fiber point diffraction longitudinal shearing interferometry'. Together they form a unique fingerprint.

Cite this

Chen, L., Guo, X., & Hao, J. (2013). Refractive index measurement by fiber point diffraction longitudinal shearing interferometry. Applied Optics, 52(16), 3655-3661. https://doi.org/10.1364/AO.52.003655