Advantages of obliquely cut TGS crystals in pyroelectric applications

A considerable increase in the pyroelectric voltage responsivity of TGS can be obtained by slicing the crystal at an oblique angle to the pyroelectric axis. When approaching the transition temperature, both the maximum gain and the angle between the optimum orientation and the pyroelectric axis increase as the dielectric anisotropy increases. The maximum voltage responsivity attainable in oblique cuts is about twice that obtained in a regular cut lying perpendicular to the pyroelectric axis.