Patent ID: 8125634
Filing Date: 2012-02-28
Classification: G01J,G01N

Abstract:
1. An additive {hacek over (S)}olc filter (ASF), comprising: a first polarizer having an input for receiving an input light and transmitting a first polarized light output; at least one birefringent plate positioned to receive the first polarized light output and transmit a second light output having a wavelength dependent state of polarization; a second polarizer for receiving the second light output and transmitting a third polarized, filtered light output; and wherein the first polarizer, the at least one birefringement plate, and the second polarizer each have a selected relative position and orientation such that the at least one birefringement plate second light output includes at least one or more wavelengths polarized so that they are selectively rejected by the second polarizer from the third light output and by which the ASF thereby operates as a narrow-line wavelength rejection (notch) filter with the third polarized, filtered light output thereby comprising a narrow-line additive wavelength transmission output.