Optical Disk Drive
An optical disk drive (ODD) makes use of a laser mild to examine facts from or write facts to an optical disc. These encompass CDs, DVDs, and Blu-ray discs. … Refurbished Optical Drives. Most cutting-edge drives will let you write to an empty disc so that you can create your song CDs or create a backup replica of vital facts.
In the actual world, “optical” refers to vision or the cap’s potential to see. In the laptop world, however, “optical” refers to lasers, which can “see” and examine information on optical discs.
These discs encompass CDs and DVDs, which might be made from tens of thousands and thousands of small bumps and dips. Optical drives have lasers that examine those bumps and dips as ones and zeros, which the laptop can understand.
Optical Drives | Uses | Components | Specification
Specifications of an Optical Drive
There are many types of optical drivers which is available in the market. This also includes the cd player DVD player BD writers and combos.
The specification of optical drivers drives to be are:
Supported media types:
The optical drive must support a major part of available types of discs in the market.
DVD-R ,DVD-ROM ,CD-RW ,CD-R ,DVD-RAM ,DVD-RW ,DVD+RW.
Media types are different for the drive’s to read and write capabilities.
Interface: The interface that an optical drive uses and the port that it will use to connect to the system. The interfaces have transfer speeds of their own. For example, a max. of 167 MBps for IDE, 600 MBps for SATA. But, the current technologies available for optical drives can only provide speeds that are lower than modern systems. So in case, both the ports are available in your system, the interface is not much of a specification.
Buffer Size: The optical drive buffer works in the same manner as the cache of a hard drive It stores a fraction of frequently accessed data that can be accessed extremely fast. It helps the system to access data from the drive even if the processor is being utilized 100% by other processes for a fraction of a second. Usually 1 or 2 or 4 MB.
Read & Write Speeds: All-optical drives have different read and write speeds and different read or write speeds for different types of media. For example, DVD drives have a speed of 16x, 20x, 24x (where x is 1.35 MBps) and CD drives have a speed of 32x, 48x, 52x (where x is 150 KBps). An optical drive will always write different types of media at different speeds (For example, a CD at 48x, a DVD at 16x, and a re-writable DVD at 4x).
An optical disk drive uses a laser to read and write data. A laser in this context means an electromagnetic wave with a very specific wavelength within or near the visible light spectrum. Different types of discs require different wavelengths. For compact discs or CDs, a wavelength of 780 nanometers (nm) is used, which is in the infrared range. For digital video discs or DVDs, a wavelength of 650 nm (red) is used, while for Blu-ray discs a wavelength of 405 nm (violet) is used.
An optical drive that can work with multiple types of discs will therefore contain multiple lasers. The mechanism to read and write data consists of a laser, a lens to guide the laser beam, and photodiodes to detect the light reflected from the disc.
The optical mechanisms for reading CDs and DVDs are quite similar, so the same lens can be used for both types of discs. The mechanism for reading Blu-ray discs, however, is quite different. An optical drive that works with all types of discs will therefore have two separate lenses: one for CD/DVD and one for Blu-ray.