Patent ID: 6137618
Filing Date: 2000-10-24
Classification: G02B

Abstract:
A system for linearly polarizing a beam of electromagnetic radiation consisting of, in a functional sequence, a Brewster angle polarizer and a non-Brewster angle polarizer, between which, as defined by a pathway followed by an electromagnetic beam caused to pass therethrough, are present at least two reflective means, such that in use one selection from the following group applies:a beam of electromagnetic radiation is caused to pass through said non-Brewster angle polarizer, reflect from a first reflective means, reflect from a second reflective means and then interact with said Brewster angle polarizer; anda beam of electromagnetic radiation is caused to interact with said Brewster angle polarizer, reflect from a first reflective means, reflect from a second reflective means and then pass through said non-Brewster angle polarizer.