Dynamic range enhancement of the roll angle displacement measurement with birefringence using a polarization camera.

A roll angle displacement measurement technique with high resolution for large-range measurement is presented. The proposed technique is based on the birefringence effect and phase detection of polarization interferometry with a polarization camera. The phase difference variation between the - and -polarized light induced by a rolling birefringent crystal can be obtained by a polarization camera.

Measurement of the refractive index of lenses from the maximum phase difference of the total internal reflection with a polarization camera.

The proposed total internal reflection (TIR)-based technique can be used for measuring the refractive index of lenses. Distribution of the phase difference between the - and -polarization states of the reflected light induced by TIR can be obtained by a polarization camera. The refractive index of the lens can be determined from the detected maximum phase difference, with the specific measurement equation.