No.

Name

No.

Name

1

VCSEL

4

Lens (TCL)

2

Collimating Lens

5

1/4 Wavelength Board

3

Aperture

 

 

  • The LD unit employs VCSEL (Vertical Cavity Surface Emitting Laser) technology. 40 channels (ch1 to ch4) emit 40 laser beams.
  • A photosensor, built into the VCSEL on the LD board, detects laser output.
  • The laser diode (LD) fires the laser beams through the aperture of the collimating lens where photosensors detect the output.
  • After the beams pass through the refraction grid, 1/4 wave length board, collimating lens, and aperture, the sides of the polygon mirror in the path of the beams reflect them onto the drum.
  • VCSEL control also slows the rotation of the polygon motor to suppress heat and electrical discharge.