An optical disc drive uses laser light to read and write data to optical discs. It contains a rotational mechanism that varies the disc's speed between 200-500 RPM depending on the disc's location. Optical drives also use either a tray-loading or slot-loading mechanism to insert discs. The laser is used to melt areas of the disc's recording layer, altering its crystalline structure to write data bits. The optic contains the laser, lens to guide the beam, and photodiodes to detect the reflected light and read the data.

1. Optical drive By Daniel Calvo Cano 4ºC

2. Definition In computing, an optical disc drive ( ODD ) is a disk drive that uses laser light or electromagnetic waves near the light spectrum as part of the process of reading or writing data to or from optical dises

3. Parts of an Optical Drive Rotational mechanism :Of course the implication of the CLV(Constant linear velocity), as opposed to the VAC, making the disk angular velocity is not constant and therefore the rotary engine must be designed to vary the speed between 200 RPM on the outer edge and 500 RPM on the inside edge.

4. Parts of an Optical Drive Loading mechanisms :Current optical drives use either a tray-loading mechanism, where the disc is loaded onto a motorised or manually operated tray, or a slot-loading mechanism, where the disc is slid into a slot and drawn in by motorized rollers.

5. LASER AND OPTIC LASER : the laser is used to melt a crystalline metal alloy in the recording layer of the disc. Depending on the amount of power applied, the substance may be allowed to melt back (change the phase back) into crystalline form or left in an amorphous

6. LASER AND OPTIC Optic:The most important part of an optical disc drive is the optical path, located in a pickup head (PUH), which usually consists of a semiconductor laser, a lens that guides the laser beam, and photodiodes that detect the light reflected from the disk surface.