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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 hologram keeps the information on the amplitude and phase of the field. Several holograms may keep information about the same distribution of light, emitted to various directions. The numerical analysis of such holograms allows one to emulate large numerical aperture, which, in turn, enables enhancement of the resolution of optical microscopy.
The Holographic Versatile Disc (HVD) is an optical disc technology that was expected to store up to several terabytes of data on an optical disc 10 cm or 12 cm in diameter. Its development commenced in April 2004.
Packs of thin glass sheets, angled so as to reflect away light of the unwanted polarity, served as the viewing filters. [7] Polarized 3-D glasses only became practical after the invention of Polaroid plastic sheet polarizers by Edwin Land , who was privately demonstrating their use for projecting and viewing 3-D images in 1934. [ 8 ]
A holographic screen is a two-dimensional display technology that uses coated glass media for the projection surface of a video projector. "Holographic" refers not to a stereoscopic effect, but to the coating that bundles light using formed microlenses. The lens design and attributes match the holographic area.
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The HoloLens features an inertial measurement unit (IMU) (which includes an accelerometer, gyroscope and a magnetometer), [20] four "environment understanding" sensors (two on each side), an energy-efficient depth camera with a 120°×120° angle of view, [23] a 2.4-megapixel photographic video camera, a four-microphone array and an ambient ...
Computer-generated holography (CGH) is a technique that uses computer algorithms to generate holograms.It involves generating holographic interference patterns.A computer-generated hologram can be displayed on a dynamic holographic display, or it can be printed onto a mask or film using lithography. [1]