This work proposes a simple measurement technique based on the optical activity of cholesteric liquid crystal (CLC) and circular common-path heterodyne interferometry for measuring small wavelength differences. A circularly polarized heterodyne light passes through a CLC cell and an analyzer, genera
โฆ LIBER โฆ
Measuring small wavelength differences by heterodyne interferometry and optical activity of chiral crystal
โ Scribed by Jing-Heng Chen; Yin-Cheng Chang
- Publisher
- Elsevier Science
- Year
- 2006
- Tongue
- English
- Weight
- 159 KB
- Volume
- 267
- Category
- Article
- ISSN
- 0030-4018
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In this study an alternative method based on surface plasmon resonance is proposed for in-situ monitoring of variation in the refractive index of a test sample. A wavelength-modulated light source and an unequal-pathlength optical configuration heterodyne interferometer are used to detect the phase