A system that contains a semi-ellipsoidal SLM holder supporting a plurality of flat rectangular SLMs, which are placed onto the semi-ellipsoidal surface of the holder in the most surface-covering way. The system contains a coherent light source placed in the first focal point of the ellipsoid. The second focal point of the ellipsoid defines the area in which an image-receiving object is to be placed. All the SLMs are illuminated by a diverging light beam emitted from the coherent light source. In each SLM, the light is subjected to phase-amplitude modulation and is converted into an image-carrying beam, which convergently fells onto the object on which the target image is to be produced. Thus, a pattern is formed on the object by a maskless method in which a plurality of SLMs are combined into a common image-forming holographic unit.

An embodiment of the invention relates to a method for carrying out a time-resolved interferometric measurement comprising the steps of generating at least two coherent waves, overlapping said at least two coherent waves and producing an interference pattern, measuring the interference pattern for a given exposure time, thereby forming measured interference values, and analyzing the measured interference values and extracting amplitude and/or phase information from the measured interference values. In at least one time segment, hereinafter referred to as disturbed time segment, of the exposure time, the interference pattern is intentionally disturbed or destroyed such that the corresponding measured interference values describe a disturbed or destroyed interference pattern. In at least one other time segment, hereinafter referred to as undisturbed time segment, of the exposure time, the interference pattern is undisturbed or at least less disturbed compared to the disturbed time segment such that the corresponding measured interference values describe an undisturbed or less disturbed interference pattern. The measured interference values that were measured during the entire given exposure time, are filtered, wherein those interference values that were measured during the at least one disturbed time segment, are reduced, suppressed or discarded. The filtered interference values are analyzed and the amplitude and/or phase information is extracted from the filtered interference values.

An additive manufacturing device may include a material supply, a robot, and a printing head coupled to a distal end of the robot and configured to receive printing material from the material supply. The additive manufacturing device may have an IR holographic device configured to generate a targeting hologram, an IR sensor, and a controller coupled to the robot, the printing head, the IR holographic device, and the IR sensor. The controller may be configured to cause the printing head to dispense the printing material to form an object based upon the targeting hologram.

A system for surface patterning using a three dimensional holographic mask includes a light source configured to emit a light beam toward the holographic mask. The holographic mask can be formed as a topographical pattern on a transparent mask substrate. A semiconductor substrate can be positioned on an opposite site of the holographic mask as the light source and can be spaced apart from the holographic mask. The system can also include a base for supporting the semiconductor substrate.

A printing device (106) includes a laser source and a LCOS-SLM (Liquid Crystal on Silicon Spatial Light Modulator). The printing device generates a laser control signal and a LCOS-SLM control signal. The laser source (110) generates a plurality of incident laser beams based on the laser control signal. The LCOS-SLM (112) receives the plurality of incident laser beams, modulates the plurality of incident laser beams based on the LCOS-SL M control signal to generate a plurality of holographic wavefronts (214,216) from the modulated plurality of incident laser beams. Each holographic wavefront forms at least one corresponding focal point. The printing device cures a surface layer or sub-surface layer (406) of a target material (206) at interference points of focal points of the plurality of holographic wavefronts. The cured surface layer of the target material forms a three-dimensional printed content.

Additive manufacturing (AM) exploits materials added layer by layer to form consecutive cross sections of desired shape. However, prior art AM suffers drawbacks in employable materials and final piece-part quality. Embodiments of the invention introduce two new classes of methods, solidification and trapping, to create complex and functional structures of macro/micro and nano sizes using configurable fields irrespective of whether they need a medium or not for transmission. Selective Spatial Solidification forms the piece-part directly within the selected build material whilst Selective Spatial Trapping injects the build material into the chamber and selectively directs it to accretion points in a continuous manner. In each a localized spatiotemporal concentrated field is established by configuring or maneuvering field emitters. These methods are suitable to create any 3D part with high mechanical properties and complex geometries. These layerless methods may be used discretely or in combination with conventional AM and non-AM manufacturing processes.

A display device according to an embodiment of the present disclosure includes: a transparent screen; one or more imaging units; and a video projection unit that acquires positional information regarding a predetermined subject included in each of captured images obtained by the one or more imaging units and then irradiates the transparent screen with video light on the basis of the positional information to cause predetermined video to appear on the transparent screen for the subject.

An apparatus and a method for laser beam shaping and scanning. The apparatus includes a digital micromirror device (DMD) including a plurality of micromirrors, configured to receive a first laser beam, adjust an axial position of a focal point of the first laser beam along a moving direction of the first laser beam by controlling a focal length of wavefront of a binary hologram applied to the DMD, and adjust a lateral position of the focal point on a plane perpendicular to the moving direction by controlling a tilted angle of a fringe pattern and a period of fringes of the binary hologram applied to the DMD, wherein the DMD simultaneously functions as programmable binary mask and a blazed grating.

A laser fabrication method and a laser fabrication system. The laser fabrication system includes an ultrafast laser source configured to output a laser beam; and a digital micromirror device (DMD), configured to receive, shape, and scan the laser beam, wherein more than one binary holograms are synthesized to form a scanning hologram applied to the DMD. The shaped laser beam, containing one or multiple focal points, leaving the DMD, are focused to the sample for fast laser fabrication.

A device (200,300) forms steerable plasma (222, 310) using a laser source (110) and a LCOS-SLM, Liquid Crystal on Silicon Spatial Light Modulator (112). The device generates a laser control signal and a LCOS-SLM (Liquid Crystal on Silicon Spatial Light Modulator) control signal. The laser source generates a plurality of incident laser beams based on the laser control signal. The LCOS-SLM receives the plurality of incident laser beams, modulates the plurality of incident laser beams based on the LCOS-SLM control signal to form a plurality of holographic wavefronts. Each holographic wavefront forms at least one corresponding focal point. The LCOS-SLM forms plasma at interference points of the focal points of the plurality of holographic wavefronts.