Determination of ordinary and extraordinary refractive indices of nematic liquid crystals by using wedge cells

• Autorzy: Kędzierski J. , Raszewski Z. , Kojdecki M. A. , Kruszelnicki-Nowinowski E. , Perkowski P. , Piecek W. , Miszczyk E. , Zieliński J. , Morawiak P. , Ogrodnik K.
• Języki publikacji: EN

Abstrakty

EN

A new accurate and fast interference method for determining ordinary and extraordinary refractive indices of nematic liquid crystals is presented and discussed. The method relies on microscopic measurements of distances between interference fringes appearing in polarised parallel coherent monochromatic light beam transmitted normally to the surfaces through a wedge cell filled with a nematic. Both glass plates confining the cell are coated with a partly transparent thin film of metal which is deposited by evaporation in vacuum. Owing to the multiple reflections between the surfaces and a small edge angle, the interference fringes observed near the wedge apex edge are sharp and equidistant. To apply this method one needs only small amount of an investigated liquid crystal. Basic mathematical formulae and results of an experiment are briefly discussed.

Słowa kluczowe

EN

nematic liquid crystals; wedge cell; refractive index; multi-beam light interference in wedge plate

• Wydawca: Stowarzyszenie Elektryków Polskich ; Polska Akademia Nauk ; Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
• Czasopismo: Opto-Electronics Review
• Rocznik: 2010
• Tom: Vol. 18, No. 2
• Strony: 214--218
• Opis fizyczny: Bibliogr. 21 poz., il., wykr.

Twórcy

autor

Kędzierski J.

autor

Raszewski Z.

autor

Kojdecki M. A.

autor

Kruszelnicki-Nowinowski E.

autor

Perkowski P.

autor

Piecek W.

autor

Miszczyk E.

autor

Zieliński J.

autor

Morawiak P.

autor

Ogrodnik K.

• Institute of Applied Physics, Military University of Technology, 2 Kaliskiego Str., 00-908 Warsaw 49, Poland,

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