High-speed laser printer using multiple beams from optical fiber array coupled with violet laser diodes

In high-speed and high-resolution laser printer, parallel recording using multiple laser beams is an essential technique. In the printer we use Selenium photoreceptor which has sensitivity in blue wavelength because it has high-durability. In the optics of our conventional printer the beam from an Argon laser is divided into multiple beams by a grating, and a multi-channel acousto-optic modulator modulates the beams. But the optics has a limitation to raise the print speed because the heat from the air-cooled Argon laser is too large to raise laser power To overcome it, we have introduced an optical fiber array device coupled with violet laser diodes instead of the Argon laser, and realized high-speed printer of 1400 mm/s with 600 dpi (23.6 dots/nim) successfully.