Abstract

A low-loss deflection prism for a laser beam is proposed, and its various characteristics such as beam quality, transmittance, deflection angle, and polarization state are presented. The prism having a trapezoidal form is made from BK7 glass and is designed for a He–Ne laser beam. When a p-polarized beam is incident on the slant surface of the prism at the Brewster angle, the totally reflected and transmitted beam is deflected by 90°, and the measured transmittance is nearly 98%. The theoretical transmittances of the proposed prism are compared with those of a Pellin–Broca prism.

© 2005 Optical Society of America

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