id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
ap-366	Bálek, R.; Šlegrová, Z.	A Comparison of Acoustic Field Measurement by a Microphone and by an Optical Interferometric Probe	2002	5	.pdf	application/pdf	2737	128	61	1: System of coordinates The integral phase change (5) is in terms of plane waves equal to: � � � � � �� �� � � � �z z A A z A At kL p t p t� � � �0 0 1 1 1 0 2 2 2sin sin , (7) or, more simply, � � � � � �� � �z z zt t t� �1 2 (8) � � � �� z izt k p t� 0 , (9) where piz(t) is the integral value of the acoustic pressure. This holds in terms of the Raman-Nath diffraction regime, which is restricted by the Klein-Cook parameter Q and the Raman-Nath parameter � [1] within the bounds Q � 1 (1) and Q � � � 1. (2) The Q and � are defined as follows: Q L n � 2 0 �� �� (3) � � � � � 2 L n , (4) where � [m] is the laser light wavelength in a vacuum, � [m] is the acoustic wavelength in the interaction medium, n0 [-] is the refractive index in a medium without ultrasound, �n [-] is the amplitude of the refractive index changes and L	cache/ap-366.pdf	txt/ap-366.txt