Digital printers using multiple lasers or laser arrays with diff

Details Digital printers using multiple lasers or laser arrays with diff Digital printers using multiple lasers or laser arrays with diff

1993-04-30

1997-04-29

Fuller, Benjamin R.

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

347241, 347244, B41J 2455, B41J 247

Patent

active

056254024

ABSTRACT:
Laser color printers include multiple laser sources formed of either diode lasers or laser diode arrays emitting light beams of different wavelengths, and an optical arrangement. The optical arrangement independently processes each of the light beams to provide a separate predetermined sized collimated light beam, and then focuses and scans the light beams over a printing media that prints separate colors for each different wavelength of light. Where different sized collimated light beams are required to match a printing media, a separate zoom lens is used is used in the optical arrangement to independently reshape each of two orthogonal cross-sectional directions of a separate one of the light beams before being properly sized at the output thereof. Where only one of the two orthogonal cross-sectional directions of the light beams has to be reshaped, the light beams are collimated and combined and pass through a beam shaper which reshapes that cross-sectional direction of the light beams before the light beams are focused and scanned over the printing media. Where laser diode arrays are used to generate separate wavelength light beams, each of the light beams from the lasers of an array are formed and focused into a linear array of spots on the printing media.

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