US 11,892,143 B2
Compact laser beam combiner with micro-prism reflector
Hugo Johan Cornelissen, Escharen (NL); Olexandr Valentynovych Vdovin, Maarheeze (NL); Robert Van Asselt, Valkenswaard (NL); Rifat Ata Mustafa Hikmet, Eindhoven (NL); and Ties Van Bommel, Horst (NL)
Assigned to SIGNIFY HOLDING B.V., Eindhoven (NL)
Appl. No. 17/780,062
Filed by SIGNIFY HOLDING B.V., Eindhoven (NL)
PCT Filed Nov. 23, 2020, PCT No. PCT/EP2020/083063
§ 371(c)(1), (2) Date May 26, 2022,
PCT Pub. No. WO2021/110456, PCT Pub. Date Jun. 10, 2021.
Claims priority of application No. 19213077 (EP), filed on Dec. 3, 2019.
Prior Publication US 2023/0016179 A1, Jan. 19, 2023
Int. Cl. G02B 5/04 (2006.01); G02B 27/10 (2006.01); G02B 27/12 (2006.01); G02B 27/30 (2006.01); F21V 13/04 (2006.01); F21V 29/503 (2015.01); F21V 9/30 (2018.01); F21V 5/02 (2006.01); F21Y 115/30 (2016.01); F21Y 113/10 (2016.01)
CPC F21V 13/04 (2013.01) [F21V 5/02 (2013.01); F21V 9/30 (2018.02); F21V 29/503 (2015.01); G02B 5/045 (2013.01); G02B 27/1006 (2013.01); G02B 27/126 (2013.01); G02B 27/30 (2013.01); F21Y 2113/10 (2016.08); F21Y 2115/30 (2016.08)] 15 Claims
OG exemplary drawing
 
1. A light generating device comprising (i) a plurality of n light sources, and (ii) an optical component comprising an array of prismatic elements, wherein:
the plurality of n light sources comprise a first subset of one or more first light sources comprising a first laser light source and being configured to generate collimated first light source light and a second subset of one or more second light sources comprising a second laser light source and being configured to generate collimated second light source light, wherein n≥2;
the array of prismatic elements is configured in a light receiving relationship with the plurality of n light sources, wherein the array of prismatic elements comprises k1 parallel arranged first prismatic faces and k2 parallel arranged second prismatic faces, wherein k1≥2 and wherein k2≥2, wherein the first prismatic faces and the second prismatic faces are not mutually parallel;
the first light sources are configured to irradiate the first prismatic faces and the second light sources are configured to irradiate the second prismatic faces; and
the prismatic elements are configured to reflect or refract the collimated first light source light and the collimated second light source light as coincident beams of first light source light and second light source light,
wherein the first light source light and the second light source light have different spectral power distributions, wherein the light generating device further comprises control system configured to control one or more of the correlated color temperature, the color rendering index and the color point of the device light by controlling the first light source and the second light source;
wherein the light generating device is arranged for generating white light with the correlated color temperature selected from the range of 2700 K to 6500 K and with the color rendering index being at least 80; and
wherein relative to a plane the first prismatic faces and the second prismatic faces of the prismatic elements have predetermine first base angles (β1), wherein the first light source light has a first optical axis and wherein the second light source light has a second optical axis wherein the optical axes have beam angles (α1,α2) with the plane that are equal to or smaller than the respective base angles (β1).