Graring(Optical pick-up), Bs, and Mirror which search and control information on CD or DVD are measured and produced through a fine semiconductor process to separate the laser beam and adjust the light amount.

*Diffration Grating which is produced through semiconductor process glass etching. Is a standign block, and it separates one laser beam into three beams. It separates the Beam Spliter laser beam in a fixed ratio, according to module characteristics, and accurately controls, tracks, stops and plasy musi and video in a sppedy manner by changing the moving paht of the beam

*Applications: CD/DVD RW, DVD-ROW, CD Player, MD Player.