BIREFRINGENT BEAM DISPLACER

摘要

A birefringent beam displacer assembly includes a light source that produces a polarized initial light beam (70) having a first portion and a second portion. A halfwave plate (105) changes a polarity of the first portion (70a) of the polarized initial light beam. A birefringent beam displacer (100) receives, at an input side, the first portion (70a) from the halfwave plate (105) and the second portion (70b). The birefringent beam displacer (100) has an optic axis (107) for producing a vector walkoff of the second portion (70b). The first portion (70a) of the polarized initial light beam passing substantially parallel to the length of the birefringent beam displacer, and the second portion (70b) moves at an angle toward the first portion such that the first portion and the second portion substantially overlap at an output side of the birefringent beam displacer to form a combined beam (80).