Patent ID: 6608674
Filing Date: 2003-08-19
Classification: G02B

Abstract:
A device for combining optical radiation by utilizing the polarization properties of light, comprising:a plane-parallel optically transparent plate with a refraction index n which has an optically active first surface on which a first optical beam (active beam) impinges, and a second optically active surface parallel to the first one on which a second optical beam (targeting beam) impinges on the exit location of the first beam from said second surface; said plane-parallel plate being arranged relative to the beams or the beam paths to be coupled in such a way that the first beam impinges on the first surface of the plate and the second beam impinges on the second surface of the plate and that both do this at an angle &agr; which is equal to or approximately equal to the Brewster angle corresponding to the refractive index n of the plate; and said first and second beam being linearly polarized; the plane of polarization of the first beam being parallel to the plane of incidence of the device and the plane of polarization of the second beam being vertical to the plane of incidence of the device.