KSLStrain    

Tilt angle

Tilt angle ("Tilt X"  in “Settings/Microscope settings”) is  in degrees. The angle has no influence on the parameters of orientation. The orientation is defined by the diffraction pattern; i.e., it should be provided as the orientation of the crystal with rescpect to the microscope coordinate system. The tilt angle is used in the plane stress case. Alternatively, instead of tilt angle, the components (in microscope coordinate system) of the vector normal to the specimen can be provided ("Normal to the specimen" in   “Settings/Microscope settings”).  

The angles are defined in such a way that:
v(1) = 0
v(2) = Sin(t)
v(3) = Cos(t)
where v(i) are components of "Normal to the specimen" in microscope coordinate system, and t is the value in the  "Tilt X" text field. 

Once the proper values of tilt angles or the components of the "Normal to the specimen" are entered, click the “Apply” command button.