Holographic Projectors

Holographic projectors will be able to render sharp projected images from relatively small projection devices (e.g. cell-phones) because they do not require high intensity, high-temperature light sources. Investigators at companies and universities are working toward applied science that could make television with holographic projections (holovisions) that can project moving, three-dimensional pictures outside of the screen. Genuine holographic motion picture science lets people see travelling, three- dimensional images absent special glasses. One means of creating animated holotechnology images is to send laser light by means of a lithium niobate waveguide covered by piezoelectric material. A modulator converts video impulses into vibrations of the piezoelectric material that, in turn, alters the configuration of the light beam going through it. When this ray is shone into a translucent volume, it creates a 3D travelling image. two and three dimensional interference patterns presents some alternative perspectives.

A holographic memory device that can store as much as five gigabytes could replace flash memory for many usages. It would be a boon to handheld machines like PDAs and smart phones. Next generation smart phones may use holotechnology applied science for data storage and display projection. For memory, holographic information recording and playback could significantly increase the memory capacity of phones. For display, holotechnology projection can show images, unconstrained by the tiny size of a handheld device. The idea of watching television on one's cellphone is in vouge now, but who wants to watch TV on a 2" screen? If it were possible to project a large picture from a cellphone onto a nearby wall, that would transform the use of cellphones for visual media. Also, storing data three-dimensionally with holographic storage has interesting notes on this holotechnology topic.

In the area of marketing, holographic marketing or "holopromotion" is the application of holotechnology science to three-dimensional, high- resolution advertising. Multiple aspects of product marketing and purchasing might be put togetherd in bidirectional holograms that both draw people's attention and sell a product in real time. Holographically interactive booths and vending machines that can project consumer-responsive images several times their size will occupy much less space than traditional kiosks and vending machines. The site on telecommunications and holographic technology for more holotech information.

Many holographic information storage systems have a beam splitter that splits a laser ray into two rays. One ray, known as the object beam, goes through a Spatial Light Modulator (SLM), like a LCD, that imprints data into the ray. The object ray intersects the second ray, known as the reference ray, inside optically sensitive recording media -- especially a photopolymer. The intersection of these rays, called an interference pattern, is a holographic image that is recorded in the media. When a reference beam is shown into the storage media at the same angle and wavelength used to store the holographic image, then the holographic image is recreated and the information configuration may be extracted and changed into electronic pulses. Data on holographic storage disks are expected to last as long as 50 years, while data on magnetic tape can erode in under a decade. For these reasons, uses for which archival durability is critical may increasingly switch from tape to holodisks. Linked page shape flexibility for holographic data storage also may be of interest to you.