US 11,947,130 B2
Optical devices and systems with dichroic beamsplitter color combiner
Eitan Ronen, Rechovot (IL); and Motke Gilo, Ness Ziona (IL)
Assigned to Lumus Ltd., Ness Ziona (IL)
Appl. No. 17/290,764
Filed by Lumus Ltd., Ness Ziona (IL)
PCT Filed Nov. 7, 2019, PCT No. PCT/IB2019/059579
§ 371(c)(1), (2) Date May 2, 2021,
PCT Pub. No. WO2020/095245, PCT Pub. Date May 14, 2020.
Claims priority of provisional application 62/757,199, filed on Nov. 8, 2018.
Prior Publication US 2022/0004014 A1, Jan. 6, 2022
Int. Cl. G02B 27/28 (2006.01); G02B 27/12 (2006.01); G02B 27/14 (2006.01)
CPC G02B 27/283 (2013.01) [G02B 27/126 (2013.01); G02B 27/141 (2013.01); G02B 27/286 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An optical device comprising:
a first prism including:
a first light-wave entrance surface, a second light-wave entrance surface, and a light-wave exit surface, and
a first dichroic beamsplitter configuration deployed within the first prism on a plane oblique to at least one of the light-wave entrance surfaces; and
a second prism including:
a first light-wave entrance surface, and a second light-wave entrance surface associated with the light-wave exit surface of the first prism, and
a second dichroic beamsplitter configuration deployed within the second prism on a plane oblique to at least one of the light-wave entrance surfaces of the second prism and such that light in a first polarization state with regards to the first dichroic beamsplitter configuration is in a second polarization state with regards to the second dichroic beamsplitter configuration,
the first dichroic beamsplitter configuration transmitting light at a wavelength of a first color, polarized in the first polarization state with regards to the first dichroic beamsplitter configuration, and reflecting light at a wavelength of a second color, polarized in the first polarization state with regards to the first dichroic beamsplitter configuration, and
the second dichroic beamsplitter configuration transmitting light at a wavelength of the first color and light at a wavelength of second color, polarized in the second polarization state with regards to the second dichroic beamsplitter configuration, and reflecting light at a wavelength of a third color, polarized in the first polarization state with regards to the second dichroic beamsplitter configuration.