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Preferable geometrical parameters of samples for piezooptic experiments

Kvasnyuk O., Vasylkiv Yu., Krupych O. and Vlokh R.

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Abstract. We have shown that the errors of experimental determination of piezooptic coefficients, which are caused by friction appearing between sample surfaces and substrates can be eliminated by choosing properly geometrical parameters of the sample. The width-to-height ratio for the sample has to be equal or smaller than 1:3. In this case the error caused by a barrel-shaped distortion is reduced approximately to 1%.

Keywords: piezooptic effect, inhomogeneous stresses, barrel-shaped distorsion

PACS: 78.20.Hp, 07.10.Lw, 07.60.Fs
UDC: 535.012.2
Ukr. J. Phys. Opt. 15 195-206
doi: 10.3116/16091833/15/4/195/2014

Received: 15.10.2014

Анотація. У роботі показано, що похибку експериментального визначення пєзооптичних коефіцієнтів, спричинену силами тертя між поверхнями зразка і підкладками, можна усунути належним підбором геометричних параметрів зразка. Відношення ширини зразка до його висоти повинно дорівнювати або бути меншим за 1:3. У такому разі похибку, спричинену бочкоподібною дисторсією, можна зменшити приблизно до 1%. 
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