US 12,455,450 B2
Mixed reality combiner
Ronen Chriki, Lod (IL); Elad Sharlin, Mishmar David (IL); and Yochay Danziger, Kfar Vradim (IL)
Assigned to LUMUS LTD., Ness Ziona (IL)
Appl. No. 17/776,126
Filed by LUMUS LTD., Ness Ziona (IL)
PCT Filed Feb. 22, 2021, PCT No. PCT/IL2021/050206
§ 371(c)(1), (2) Date May 11, 2022,
PCT Pub. No. WO2021/171289, PCT Pub. Date Sep. 2, 2021.
Claims priority of provisional application 63/001,567, filed on Mar. 30, 2020.
Claims priority of provisional application 62/980,469, filed on Feb. 24, 2020.
Prior Publication US 2022/0397766 A1, Dec. 15, 2022
Int. Cl. G02B 27/01 (2006.01); F21V 8/00 (2006.01); G02B 27/14 (2006.01)
CPC G02B 27/0172 (2013.01) [G02B 6/0026 (2013.01); G02B 6/0031 (2013.01); G02B 27/14 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A waveguide combiner comprising:
a first waveguide comprising first and second parallel totally internal reflecting face surfaces having a normal “nw”;
an input aperture through which light enters the first waveguide;
an output coupling configuration associated with an output coupling region, which expands the input aperture in at least one direction, and through which light that enters the first waveguide exits the first waveguide; and
an output coupler configured for use with at least one laser, and comprising a plurality of parallel facets embedded in the first waveguide and having a facet tilt angle β between nw and a normal “nf” to the facets which facets reflect light that propagates along the first waveguide and is incident on the facets out through the output coupling region, each of the facets having a coating providing:
a facet wavelength band for a lasing band of light provided by the at least one laser that includes wavelengths of light in the lasing band and in a range of wavelengths over which the lasing band is expected to vary;
a reflectivity angular range exhibiting a first reflectivity for light having a wavelength in the facet wavelength band that propagates in the first waveguide and is incident on the facets in a first range of incident angles;
a transmittance angular range exhibiting a second reflectivity less than the first reflectivity for light having a wavelength in the facet wavelength band that propagates in the first waveguide and is incident on the facets in a second range of incident angles; and
a see-thru angular transmittance range having high transmittance for natural light incident on the facets in a third range of incident angles.