PHASE-SHIFTING TWYMAN-GREEN INTERFEROMETER UTILIZING NEMATIC AND CHOLESTERIC LIQUID-CRYSTAL CELLS

Authors
KANG CS CHUNG MS CHANG DI KONG HJ
Citation
Cs. Kang et al., PHASE-SHIFTING TWYMAN-GREEN INTERFEROMETER UTILIZING NEMATIC AND CHOLESTERIC LIQUID-CRYSTAL CELLS, Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 247, 1994, pp. 313-319
Citations number
5
Categorie Soggetti
Crystallography
Journal title
Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals → ACNP
ISSN journal
1058725X
Volume
247
Year of publication
1994
Pages
313 - 319
Database
ISI
SICI code
1058-725X(1994)247:<313:PTIUNA>2.0.ZU;2-7
Abstract
We show a phase shifting Twyman-Green interferometer utilizing a nemat ic liquid crystal (NLC) cell and a cholesteric liquid crystal (CLC) ce ll. NLC cell is used as a phase shifter (PS) and CLC cell is used as a n intensity stabilizer. The NLC PS is designed to induce a phase shift of 2 pi rad for He-Ne laser beam (lambda=632.8 nm) with the applied v oltage of about 10 V, and a CLC cell which is designed to exhibit its selective reflection peak at 632.8 nm, is used to remove the fluctuati on of the intensity of the interferogram. The interferometer system is evaluated by testing a concave mirror surface and the result is discu ssed.