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Holographic optical element (HOE) is an optical component (mirror, lens, directional diffuser, etc.) that produces holographic images using principles of diffraction.HOE is most commonly used in transparent displays, 3D imaging, and certain scanning technologies.
A holographic display is a type of 3D display that utilizes light diffraction to display a three-dimensional image to the viewer. Holographic displays are distinguished from other forms of 3D displays in that they do not require the viewer to wear any special glasses or use external equipment to be able to see the image, and do not cause a vergence-accommodation conflict.
The original Cricut machine has cutting mats of 150 mm × 300 mm (6 in × 12 in), the larger Cricut Explore allows mats of 300 mm × 300 mm, and 300 mm × 610 mm (12 in × 12 in, and 12 in × 24 in). The largest machine will produce letters from a 13 to 597 mm (0.5 to 23.5 in) high.
Holographic data storage is a potential technology in the area of high-capacity data storage. While magnetic and optical data storage devices rely on individual bits being stored as distinct magnetic or optical changes on the surface of the recording medium, holographic data storage records information throughout the volume of the medium and is capable of recording multiple images in the same ...
For holographic data storage, holographic associative memory (HAM) is an information storage and retrieval system based on the principles of holography. Holograms are made by using two beams of light, called a "reference beam" and an "object beam". They produce a pattern on the film that contains them both. Afterwards, by reproducing the ...
Volume holograms are holograms where the thickness of the recording material is much larger than the light wavelength used for recording. In this case diffraction of light from the hologram is possible only as Bragg diffraction, i.e., the light has to have the right wavelength (color) and the wave must have the right shape (beam direction, wavefront profile).
Selected excerpts from state statutes in United States jurisdictions that recognize holographic wills: (NOTE: The list is not exhaustive) Louisiana – under the Louisiana Civil Code such a will is known as an "olographic testament," [ 50 ] and must be proved by the testimony of two credible witnesses that the testament was entirely written ...