US 12,493,232 B2
Projecting with expanded field of illumination
Yi Yu Cao, Pudong New District (CN)
Assigned to AMS-OSRAM ASIA PACIFIC PTE. LTD., Singapore (SG)
Appl. No. 18/248,699
Filed by ams-OSRAM Asia Pacific Pte. Ltd., Singapore (SG)
PCT Filed Oct. 6, 2021, PCT No. PCT/SG2021/050602
§ 371(c)(1), (2) Date Apr. 12, 2023,
PCT Pub. No. WO2022/081086, PCT Pub. Date Apr. 21, 2022.
Claims priority of application No. 10 2020 127 181.6 (DE), filed on Oct. 15, 2020.
Prior Publication US 2023/0393453 A1, Dec. 7, 2023
Int. Cl. G03B 21/14 (2006.01); G02B 27/10 (2006.01)
CPC G03B 21/14 (2013.01) 15 Claims
OG exemplary drawing
 
1. An optical device, comprising:
an imaging system provided to generate a plurality of images being distributed over an imaging plane,
a micro-lens-array, MLA, wherein micro-lenses of the MLA are assigned to respective individual images of the plurality of images and are provided to form respective channels of light beams by projecting the respective individual images towards a projecting plane,
an optical expander being arranged between the MLA and the projecting plane, the optical expander comprising an input surface facing the MLA and at least two output surfaces facing the projecting plane, the optical expander being provided to fan out and direct the channels of light beams onto the projecting plane, such that
individual projections of the individual images are formed on the projection plane by the channels of light beams directed onto the projection plane, and
an overall projection is formed on the projection plane by superimposing the individual projections at least partially,
wherein at least two of the output surfaces of the optical expander are tilted with respect to each other.