Working of Optical Disk
Drive
If you want to know how
optical drive works then you first need to understand how an optical works.
Actually an optical disk has three layers.
- The
lowest layer has a big plastic disk
- While
the middle layer reflects the laser and
- The
upper layer stores the data. CLICK HERE TO KNOW Step by Step Tips to Install Optical Drive in a Computer ...
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| Working of Optical Disk Drive and Its Functioning |
On the third layer
microscopic pits stores the data, that’s why the scratchy disk founds problem
in running.
Laser light is used to
read or write data from optical drive disk, here laser means electromagnetic
waves, which has some wavelength in its light. Every disk has a different
wavelength and the measuring unit of these wavelengths is nanometer like the
wavelength of CD is 780 nm, while the wavelength of DVD is 650 nm, the
wavelength of blue – ray is 450 nm. The disk which is usable in many optical
drives has many wave lengths and a photodiode as well, which catches the
reflection from the light of disk.
The optical mechanism
which reads the CD and DVD is same, that’s why both have the same lens but the
mechanism of blue – ray is different from the others. The optical drive which
works with optical drive has 2 lenses. First works for CD and DVD, while other
works for Blue – ray.
If we talk about lens,
then an optical drive has only one rotation mechanism to rotate the disk. Every
optical drive works on CLV ( Constant Liner Velocity ), which means that the
disk can run at different speed, with that the speed of disk depends on the
laser beam and the area from where it reads the data. When laser reads the data
at outer ring then disk rotates about 200 times, but when it rotates in inner
ring then it can run 500 times in a minute. CLICK HERE TO KNOW How to Add Subtitles in VLC Media Player ...
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| How an Optical Drive Works |
Disk doesn’t need a fix
time or speed while it runs or writes the data, but it needs a constant speed
when you watches movies or plays music in it. Today every optical drives comes
with great speed ( almost 1000 to 2000 rotation per minute. ). Not just this
optical drive needs a loading mechanism, which has 2 types.
- Tray
Loading Mechanism : In this mechanism we, drives uses a try to put the
disk. A motor connect with this tray which helps it to in or out. These
mechanisms are bigger than the other laptop mechanism.
- Slot
Loading Mechanism : A slot is needed to insert disk in these mechanism
and motor connects this slide as well, this motor helps it to come in or out.
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OF OPTICAL DISK DRIVE AND ITS FUNCTIONING, IMMEDIATELY COMMENT US BELOW AND GET
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| Three Layers of Optical Drives |
How an Optical Drive Works, Three Layers of Optical
Drives, Compact Disk Work, Wavelength of CD DVD and Blueray, Constant Liner
Velocity, Tray Slot Loading Mechanism, Optical Disk Drive Mechanism
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