How does a CD work?
Today there is a wide range of CD players available to the consumer and choose the right CD player feels like a difficult task. , Color, design technical solutions och Cut vary considerably between different subjects. Some players are portable, some are embedded in larger audio systems. Some players can handle only one disk at the time, others can easily save between 50 slides or more. Some CD players are very cheap,others are very expensive. The list goes on. No matter which CD you choose, but will consist of three basic components, the CD can be found in any modern society: a drive motor, a tracking device and a laser and lens system. Another thing that all CD players have in common is that the interpretation of data) disk is stored in form of elongated bumps on a CD (kompak.
The race car for your CD player iswhat makes the disk to rotate in a circle on a proper speed. The race car gradually adjust the speed when the rhythm depends on what part of the disk that is currently interpreted. Some sites will rate does not exceed 200 rpm is not, while elsewhere the rate should be increased to 500 rpm. If the drive in circles, rotate the motor drive assembly is drawn through a mechanism allows the laser and laser and lens systemfocus on the small impact that stores data. The laser is continuously pushed from the center outwards on the system disk cap.
The data are interpreted by the laser and lens system is stored in the form of elongated bumps on the surface of the CD. One hit is very small and not greater than 0.5 microns. The height is greater than 125 nanometers and lengths are 0.83 microns or so. All these keys are very well organizedsurface of the CD in the form of 5 km (3.5 miles) long spiral.
The CD is made of several layers including a layer of plastic and a layer of aluminum. When the laser attempts to interpret the data is stored CDs, will penetrate the first layer of polycarbonate. The aluminum layer reflects the laser beam and the light changes will be identified by a particular mechanism in optical CD.Since the impact that the data are stored in reflected light differently than the areas between the bumps (usually called "countries"), CD-player can determine exactly which parts of the disk as the buttons and what not I am.
If a CD is scratched or damaged in any way, it may be impossible for the CD player to interpret. Sometimes just a small piece of data will be skipped, but severe liver damageAll unusable discs. Always store discs in a protective sleeve to reduce the risk of scratches. When you clean your CDs, move your hand from the center outwards to the edge rather than simply swabbing around. Scratches found a radial motion tends to be less harmful than other scratches.