Here, it meets the reference beam, which travels directly from the laser. The two beams interfere and a dark and light pattern is produced on the photographic film. Hence, a hologram is created. .
To display the hologram image, the reference beam is made to illuminate the photographic film and this causes the signal beam to be re-created. This reconstructed beam is a three dimensional image of the object.
Section 3.1 - How is binary computer data stored/read in this form?.
Holographic computer storage works on a similar principle to the way a hologram is created. The two beams of light are made using a blue-green argon laser. The storage medium in this case is a photorefractive crystal, typically made from lithium-niobate. Just as before, the reference beam travels straight to the storage medium. The signal beam passes straight through a Spatial-Light Modulator (SLM). .
The SLM is a liquid crystal display that stores pages of binary data as light and dark pixels. The pages of binary data are simply created from the binary code of the information that is to be stored. .
The signal beam then carries this data to the light sensitive crystal. Here, it is focused at a point where it interacts with the reference beam, and an interference pattern is formed. This pattern very slightly changes the molecular structure of the crystal, and the information is stored as a hologram.
To read this information, the reference beam is focused on to the crystal at the exact position where the hologram is stored. The crystal then diffracts the beam and the original stored information is recreated. The information is then focused onto a Charge-Coupled Device (CCD) camera. .
The CCD camera interprets and sends the digital information to where it is needed, i.e. the computer.
Section 3.2 - How is more information stored?.
The amount of information that can be stored on a one centimeter sized crystal cube is potentially huge. This is because, when storing data, a slight change (about a thousandth of a degree) in the angle of the signal beam causes the information to be stored in a different location.
Next, is the memory A.K.A RAM(Random Access Memory). ... Files represent programs and documents you can load into memory. ... Floppy disks can hold approximately 1.4 megabytes of memory. ... These devices have high capacity, removable media, optical drives. Unlike the hardrive and floppy drive using magnetic storage, these use optical(light) storage. ...
The configuration you chose should depend - to some extent - on the amount of expansion, (if any) you may want to plan for in the future. ... Random Access Memory (RAM), is system memory, or AAon board memory@@. ... CD-ROM (Compact Disc - Read Only Memory) drives are optical disks that are physically the same as an audio CD, but contain computer data. ... A DVD (Digital Video Disc) drive is an optical, high capacity version of the CD-ROM. ... Finally, ask if they would buy another computer system from that company in the future. ...
Another crucial element needed is the memory having 256MB is a sufficient amount of room to store data. ... These elements are the most crucial parts of a computer; however, you can choose to customize your PC by adding gadgets such as a DVD player, burners, wireless keyboards, wireless and optical mousse, monitors, LCD flat panels within others. ... It has a memory of 128MB, and a 40GB hard drive. ... The hardware memory includes 128MB of storage and a hard drive that holds 40GB. ... Finally, we have the IBM Think Centre A30 8191 Pentium 4 with memory that can hold 256 MB and a hard drive t...
One of the reasons for the success of computer animation is the progression in computer technology and software. Computer animation can date back to as early as the 1962 when Steve Russell, Shag Graetz, and Alan Kotok created Space War, the first interactive computer game. ... In 1995 the 3D-computer animation age was born when the release of Toy Story introduced the public to full-length computer animated movie. ... The solutions for this problem is using a program called Optical motion capture. ... OMC (optical motion capture) can be used in three simple steps. ...
When we mention the word "technology" one will instantly think about computers and computer science. ... Memory is extremely useful as things can buffer into the memory instead of streaming off of the hard drives. ... The only real difference is ball versus getting an optical mouse. An optical mouse uses a laser and reads on the screen accordingly. ... Any type of optical mouse should be good for bossiness use. ...
The now-preferred device for pointing and clicking is the optical mouse. This Microsoft Intellimouse uses optical technology. ... Although LED-based optical mice are fairly recent, another type of optical mouse has been around for over a decade. ... The most commonly used computer output devices are: 1) Raster-scan cathode ray tube (CRT). 2) Memory-tube displays. 3) Plasma Displays. 4) Liquid crystal displays ( LCDs). 5) Plotters. 6) Printers. ... Raster scan systems uses a memory buffer called frame buffer (or refresh buffer) in which the intensities of the pixels are stored....
Many computer manufacturers and computer users are expressing their thoughts about this issue. ... Digital photo cameras have memory cards in the size of a biscuit. ... Either optical discs or flashcards are used. ... Flashcards and optical discs are preferred. ... With USB memory sticks on the market, CBC predicts that those "keychain-sized USB drives will cost the same as floppy drives" in the near future. ...
Memory management is a key subject under disciplines of computer science, software engineering and information technology. It is a function of the operating system that is concerned with managing the primary memory of a computer system. With memory management the computer manages every memory allocation to each and every process in the computer system and also manages freeing up of this memory that is allocated. ... It will update itself of all changes in the computer memory in relation to tasks or processes. The protections provided by memory management to the host computer are two; a base re...