Holographic Technology

Holography is rapidly evolving from a laboratory curiousity and entertaining novelty to a core technology for data processing and storage, telecommunications, medical imaging, and human-computer interfacing. Holography.biz focuses on current and future applications of holographic technology. In the field of clinical imaging, Holographic Tomography (holotomography) is the formation and interpretation of three-dimensional medical pictures. Simple holotomography includes stationary images made from traditional imaging technological applications such as CT (Computerized Tomography), MRI (Magnetic Resonance Imaging), and PET (Positron Emission Tomography). Higher-level holotomography includes travelling, engaging 3D pictures from dedicated holographic imaging devices. Sub-page storing thousands of megabytes of data three-dimensionally covers additional information.

Touch through keyboard and mouse, joystick, touch-screen and alternative devices is the most common method of human-to-computer interaction. Sound and sight are different means of human- to-computer interaction. The main type of human-to-computer interaction built on hearing is speech interpretation applied science. The primary type of information transmission from humans to computers built on sight is gesture interpretation applied science. Gesture interpretation spans computer recognition of hand configurations and sign language, body posture and movement, full facial expressions and (in the future) perhaps lip reading as well. Also medichips provides more regarding this.

For holotechnology data encoding, first a laser beam is divided in two. Then one of the resulting rays is passed through a Spatial Light Modulator that converts patterns of electronic data into light and dark configurations in the laser beam. This ray becomes the "signal" ray. The second beam becomes the "reference" beam. Then the two rays are focused and intersected inside a photosensitive recordable media. This intersection initiates a chemical reaction between the storage medium and the configuration of overlapping peaks and troughs of the two rays of light. This burns the data into the recordable media in the form of a hologram. To restore the information, a ray with identical wave phase and angle as the original reference ray is shone into the media, the signal beam is retrieved, and the white and black patterns are converted back into electronic data via the application of a Digital Camera Detector (DCD). Three-dimensional holotechnology information storage can save much more data in a given space compared to surface-only, data storage systems such as present day CDs and DVDs. For different useful information regarding this, please see holographic data retrieval .

Among the greatest difficulties in the consumer market success of holographic applied science is the formation of ideal substances and structures for high-capacity, fast-access, safe optical recordable media. Potential materials include: highly-sensitive photochromic and photo-chemical polymers; optically sensitive crystals such as lithium niobate; organic photopolymers; and glasses. The site on holodisks and holocubes reports novel developments on this topic.