There is provided a lighting device arranged to produce a controllable light beam for illuminating a scene. The device comprises an addressable spatial light modulator arranged to provide a selectable phase delay distribution to a beam of incident light. The device further comprises fourier optics arranged to receive phase-modulated light from the spatial light modulator and form a light distribution. The device further comprises projection optics arranged to project the light distribution to form a pattern of illumination as said controllable light beam.

There is provided a method of projection using an optical element having spatially variant optical power. The method comprises combining Fourier domain data representative of a 2D image with Fourier domain data having a first lensing effect to produce first holographic data. Light is spatially modulated with the first holographic data to form a first spatially modulated light beam. The first spatially modulated light beam is redirected using the optical element by illuminating a first region of the optical element with the first spatially modulated beam. The first lensing effect compensates for the optical power of the optical element in the first region.

A method for manufacturing a radial or azimuthal polarization conversion component comprises the steps of: placing a holographic recording material between two right-angle prisms, wherein the holographic recording material is divided into at least four sector-shaped areas and is partially shielded, and only one of the sector-shaped areas is exposed each time; allowing a recording light to pass through the right-angle prisms and the exposed sector-shaped area of the holographic recording material and to interfere with a reflected object light on the holographic recording material; rotating the holographic recording material to expose the other sector-shaped areas one by one to be constructed for manufacturing volume holograms with diffraction angles of 48.19 degrees, 60 degrees or about 85 degrees.

The invention relates to a method for generating a pixelated projection in a reconstruction space. The method includes determination of a first discretized hologram, wherein the first discretized hologram is determined to generate a desired amplitude profile of an output pixel in the reconstruction space; determination of a second discretized hologram having a phase distribution determined to create a desired projection in the reconstruction space; determination of a tiled hologram by tiling the second discretized hologram a number of one or more times in one or two directions, wherein the number of tilings and the first discretized hologram are determined subject to an output pixel constraint determined based on a dimension of the amplitude profile of the output pixel in the reconstruction space and a pixel pitch in the reconstruction space. A composite hologram is determined based on a phasor multiplication of the first discretized hologram and the tiled hologram. A coherent input beam is phase modulated based on the composite hologram so that the phase modulated beam generates the pixelated projection in the reconstruction space. A particular application of the invention is the use for volumetric additive manufacturing (VAM), especially for medical use, such as implants.

There is provided a method of projection using an optical element having spatially variant optical power. The method comprises combining Fourier domain data representative of a 2D image with Fourier domain data having a first lensing effect to produce first holographic data. Light is spatially modulated with the first holographic data to form a first spatially modulated light beam. The first spatially modulated light beam is redirected using the optical element by illuminating a first region of the optical element with the first spatially modulated beam. The first lensing effect compensates for the optical power of the optical element in the first region.

A method for light detection and ranging that includes forming a first light pattern within a region of a scene by holographic projection. The first light pattern includes n light spots arranged in a regular array. A light return signal is received from each light detection element of an array of light detection elements directed at the region of the scene. The intensity of the light return signals is assessed. If the light return signals do not meet at least one signal validation criterion, a second light pattern is formed within the region of the scene by holographic projection. The second light pattern includes m light spots arranged in a regular array, wherein mn. A time-of-flight in association with each light spot of the second light pattern is then determined.

A holographic optics module having a main body having a first surface, and two or more area elements each having a holographic structure is provided, wherein the two or more area elements are arranged on the first surface of the main body such that they form a coherent area that provides a predetermined optical function.