title: Piezo- and elasto-optic coefficients for calcium tungstate crystals.
abstract: A general equation describing the rotation of an optical indicatrix of tetragonal crystals (4, 4¯, 4/m symmetry classes) around the X3axis (optical axis) depending on the direction of uniaxial pressure in the plane perpendicular to crystal optical axis is written. Partial cases of the general equation, when pressure is acting along the X1(X2) axis or along the diagonal between the X1and X2axes, are received. The values of piezo-optic coefficients (POCs) π61, π16, and π45are determined by the conoscopic method on the basis of the appropriate equations. Other POCs πimare determined by the interferometric method. All components of the matrix of elasto-optic coefficients are also determined as pin=πimCmn. These results are being compared to the ones received on the basis of wave-mechanical calculations. Objective pinvalues are necessary to build indicative surfaces of the elasto-optic effect and to find maximums of these surfaces and appropriate maximum values of acousto-optic quality coefficients.
authors.forename: B G
authors.initials: BG
authors.lastname: Mytsyk
authors.forename: N M
authors.initials: NM
authors.lastname: Demyanyshyn
authors.forename: I M
authors.initials: IM
authors.lastname: Solskii
authors.forename: O M
authors.initials: OM
authors.lastname: Sakharuk