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12-518: VRD may mean: Virtual retinal display , technology to display directly onto the retina Volunteer Reserve Decoration , medal of RNVR and RNZNVR Virgin America , ICAO airline code Victoria River Downs Airport , Australia, IATA code Vacation rental dwelling, only used in Lincoln City, Oregon, US (population 8,000) Topics referred to by

24-427: A holographic grating is a type of diffraction grating formed by an interference-fringe field of two laser beams whose standing-wave pattern is exposed to a set of photosensitive materials. The exposure triggers chemical processes within the sample and results in the formation of a periodic structure that has the same periodicity of the recorded pattern. One of the most interesting features of these structures

36-412: A set of smart glasses that are designed to appear like conventional glasses, which use retinal projection via a vertical-cavity surface-emitting laser and holographic grating . Intel gave up on this project, and sold the technology to North. In the same year, QD Laser, a Japanese laser maker spun off from Fujitsu , developed the first commercialized true VRD RETISSA Display. In the following year,

48-428: Is different from Wikidata All article disambiguation pages All disambiguation pages Virtual retinal display In the past similar systems have been made by projecting a defocused image directly in front of the user's eye on a small "screen", normally in the form of large glasses. The user focused their eyes on the background, where the screen appeared to be floating. The disadvantage of these systems

60-449: Is hoped that the retinal projection viewer may be of particular value to some visually impaired users, and the adaptation was heavily subsidised by Sony. Because of the novel user experience, and limited availability, potential buyers were strongly encouraged to participate in "touch-and-try" events to see if the technology is useful to their particular circumstances before committing to a purchase. Holographic grating In optics ,

72-407: Is their versatility and tunability as the optical response strongly depends on the blend of used materials, and their interactions with light during, and after, the recording procedure. With the expertise earned over the years, nowadays holographic gratings are very efficient with no notable difference when compared to mechanically ruled gratings. Nevertheless, the lower limit over the grating spacing

84-552: The University of Washington in the Human Interface Technology Lab resulted in a similar system in 1991. Most of the research into VRDs to date has been in combination with various virtual reality systems. In this role VRDs have the potential advantage of being much smaller than existing television-based systems. They share some of the same disadvantages however, requiring some sort of optics to send

96-425: The displays bright enough to be used during the day, and adaptive optics have allowed systems to dynamically correct for irregularities in the eye (although this is not always needed). The result is a high-resolution screenless display with excellent color gamut and brightness, far better than the best television technologies. The VRD was invented by Kazuo Yoshinaka of Nippon Electric Co. in 1986. Later work at

108-461: The firm started to sell the successor VRD RETISSA Display II, which featured a higher resolution equivalent to 720p. In 2023 Sony produced a compact camera with an integrated Retissa Neoviewer retinal projection device, for release in the US. The resolution of the retinal display only (not the camera) is claimed by the manufacturers to be nominally equivalent to 720P. Although "not a medical device" it

120-450: The image into the eye, typically similar to the sunglasses system used with previous technologies. It also can be used as part of a wearable computer system. A Washington-based startup, MicroVision, Inc., has sought to commercialize VRD. Founded in 1993, MicroVision's early development work was financed by US government defense contracts and resulted in the prototype head-mounted display called Nomad. In 2018, Intel announced Vaunt,

132-402: The same term [REDACTED] This disambiguation page lists articles associated with the title VRD . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=VRD&oldid=836996112 " Category : Disambiguation pages Hidden categories: Short description

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144-435: Was the limited area covered by the "screen", the high weight of the small televisions used to project the display, and the fact that the image would appear focused only if the user was focusing at a particular "depth". Limited brightness made them useful only in indoor settings as well. Only recently a number of developments have made a true VRD system practical. In particular the development of high-brightness LEDs have made

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