Gp7Optical Principle - Barco F70 Service Manual

DLP System General Description

4.1 GP7optical principle

Optical Principle
The F70 illumination consists of one light paths that includes the following:
48 blue 455 nm Laser Diodes (LD) grouped into 3 banks consisting of 8 (2x4 array) LDs.
The individual laser beams are combined using mirrors and a focusing lens.
The light is focused on a static diffuser placed just before the entrance of a glass integrating rod.
The scattered light is then reflected multiple times in the integrating rod, creating uniform luminance at the rod
exit.
The rod exit surface is then imaged onto the rotating Phosphor Wheel (PW) by the use of collimating lenses
and a dichroic mirror which only reflects blue and IR light.
Image 4-1
22 723–0018 /02 F70