Abstract: To increase the utilization of the polarized light, a simple device based on Brewster principle to acquire polarized light has been given in this paper. The natural light is split into two bunches after passing through the pile of glass-plates, of which the s-polarization component is revolved to the direction of p component, and both of them enter the detector in the end. The relationship between glass number m and device parameters is also settled. In the last part, glasses of different types are used to test the calculation of glass numbers and transmittance in the case of the maximum utilization of light. The test shows that the utilization can be increased by 10% through this device.

Key words: optical device, pile of glass-plates, polarized light, optical activity