Abstract: The present application discloses a beam combining device, which includes a reflective diffractive grating surface configured to combine a first, a second and a third incident light beam having different colors to a single diffracted mixed-color light beam when impinging on the reflective diffractive grating surface, wherein a profile of the grating surface is configured according to an optimization criterion with respect to a diffraction efficiency.

Abstract: An optical system for capturing 3D images includes: a plurality of optical channels, each optical channel comprising a main lens; a lens array and a receive matrix, the receive matrix being configured to create an elemental image set based on light passing through the main lens and the lens array, wherein a filling degree of the receive matrix is based on an intensity of the light passing through the main lens and the lens array; and an image processor configured to combine the elementary image sets of the plurality of optical channels based on the filling degrees of their receive matrices to produce a combined elementary image set.

Abstract: The present application discloses a light source apparatus, which includes a first, second and third light source each configured to generate a different color light beam; a beam combining element having a first incident surface directed to the first light source, a second incident surface directed to the second light source, a third incident surface directed to the third light source and an emergent surface; and a first lenslet array placed on the first incident surface, a second lenslet array placed on the second incident surface and a third lenslet array placed on the third incident surface of the beam combining element, wherein the beam combining element is configured to combine the light beams from the first, second and third light sources into a mixed-color light beam and to emit the mixed-color light beam from the emergent surface.

Abstract: The present application discloses a beam combining device, which includes a reflective diffractive grating surface configured to combine a first, a second and a third incident light beam having different colors to a single diffracted mixed-color light beam when impinging on the reflective diffractive grating surface, wherein a profile of the grating surface is configured according to an optimization criterion with respect to a diffraction efficiency.