Features:

Lens
head move outward from center movement in the region of the Table-of-Contents, find location on the disk by emitting , induced resistance to accept to the reflected signal output into electronic data.
Lens
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. Lens
head mainly includes l generator, semi-reflective prism, objective lens, lens and photoelectric diode. When head reads the data on disc, the light from generator goes through semi-reflecting prism and converges on the objective lens; lens will make 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:
Model: PVR-802W
Excitation Mode: Electric excitation
Operation Mode: Continuous
Wavelength Range: Visible light
Length: 4.8cm/1.88in
Weight: 20g(approx.)

Package Includes:
1 x
Lens
Head