Projecting with expanded field of illumination
Assigneeams-OSRAM Asia Pacific Pte. Ltd.
InventorYi Yu Cao
Life of this patent
Estimating the term…
Abstract
An optical device includes an imaging system provided to generate a plurality of images being distributed over an imaging plane. It further includes a micro-lens-array, MLA, wherein micro-lenses are assigned to individual images and are provided to form channels of light beams by projecting the individual images towards a projecting plane. An optical expander is arranged between the MLA and the projecting plane and includes an input surface and least two output surfaces. The optical expander is 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. An overall projection is formed on the projection plane by superimposing the individual projections.
Claims15
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.
A method for forming an overall projection, the method comprising:
- generating a plurality of images being distributed over an imaging plane,
- assigning micro-lenses of a micro-lens-array, MLA, to respective individual images of the plurality of images and forming respective channels of light beams by projecting the respective individual images towards a projecting plane,
- providing an optical expander and arranging the optical expander 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 fanning out and directing the channels of light beams onto the projecting plane,
- forming individual projections of the individual images on the projection plane by the channels of light beams directed onto the projecting plane, and
- 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.
Dependencies are inferred from the claim text.