Measurements of material refractive index with a circular heterodyne interferometer

Zhi Cheng Jian, Jiun You Lin, Po Jen Hsieh, Der Chin Su

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


When a light coming from a circularly polarized heterodyne light source incidents on an optical material, a phase difference between s- and p- polarization components of the reflected light occurs. This phase difference can be measured accurately with the heterodyne interferometry. The measured data are substituted into the special equations derived from Fresnel equations, the refractive index can be estimated. This method bears both merits of a common-path interferometer and a heterodyne interferometer. The refractive indices of three optical glasses and two birefringent crystals were measured to show the validity of this method.

Original languageEnglish
Article number74
Pages (from-to)882-892
Number of pages11
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5856 PART II
Publication statusPublished - 2005 Dec 19
EventOptical Measurement Systems for Industrial Inspection IV - Munich, Germany
Duration: 2005 Jun 132005 Jun 17

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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