Patent ID: 6836601
Filing Date: 2004-12-28
Classification: G02B

Abstract:
A radiation beam expander, comprising planar optical waveguide (2) and a beam expanding means in the plane of planar waveguide (2), which means is arranged on the path of radiation beam (6), characterized in that the beam expanding means is implemented in the form of stripe waveguide (3) provided with a set of unit reflectors (4) that overlap its aperture, and is arranged in the plane of planar waveguide (2), within said waveguide itself or in the vicinity thereof, with providing the possibility of passing of radiation beams (6â€²), reflected by unit reflectors (4), into planar waveguide (2), angle of inclination and arrangement of unit reflectors (4) being selected such that phase difference on the operating radiation wavelength, for any pair of beams (6â€²) reflected from different unit reflectors (4), is essentially multiple of 2&pgr;.