KHM-313AAA Optical Pick up Laser Lens Head Replacement Repair Part For DVd CD

KHM-313AAA Optical Pick up Laser Lens Head Replacement Repair Part For DVd CD Description

KHM-313AAA Optical Pick up Laser Lens Head Replacement Repair Part For DVd CD
Features:



Laser
head move outward from center movement in the region of the
Table-of-Contents, find location on the disk by emitting laser, induced
resistance to accept to the reflected signal output into electronic
data.


Laser
head is a the essential part of CD drive, and also is the most
sophisticated part.It is mainly used for data reading, so take special
care when cleaning drive inside.


Laser
head mainly includes laser generator (also known as laser diode),
semi-reflective prism, objective lens, lens and photoelectric diode.


When
laser head reads the data on disc, the laser light from laser generator
goes through semi-reflecting prism and converges on the objective lens;
lens will make laser into extremely tiny points on CD.


Because
of the reflection material on the disc, light will reflect back,
through the objective lens, then illuminate on semi-reflecting prism.


Since prism is semi-reflecting, light beam can not goes through it completely, but reached the photo-diode through the lens.


Due to the disc surface is uneven point to record data, so the reflected light will be in different directions;


people
define different direction of signal as "0" or "1", light-emitting
diodes gets the data of "0", "1", and ultimately resolve them as the
data we need.



Specifications:

Type: Single head


Model: KHM-313AAA


Length: 5cm/1.97in


Weight: 20g(approx.)



Package Includes:


1 x Laser Head