2. Product Specifications and Description2.7. Laser scanning unit (LSU)2.7.1. LSU overviewLSU consists of 1 polygon motor and 4 laser diodes(LD) units and forms a latent image on the surface of 4 OPC drums. Forthis process, LSU has a collimator lens, cylindrical lens, 2 F-Theta Lens, 2 reflective mirrors on optical path for each color.This LSU adopted the cross scan type scanning. K Color and C Color scan the laser beam from the rear to the front, M Colorand Y Color scan the laser beam from the front to the rear.Also, the LSU has a skew adjustment function which adjusts the scanning line and the shutter device to protect the glass onthe LSU optical path from the contamination.1 LD PBA2 P/Mirror Motor3 F1 Lens4 F2 Lens5 Skew Adjust Assy6 Shutter7 PD PBA2-48 Copyright© 1995-2016 SAMSUNG. All rights reserved.