Alignment correction for laser print heads

Details Alignment correction for laser print heads Alignment correction for laser print heads

1996-06-27

1998-11-24

Lee, Eddie C.

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

347244, B41J 247, G02B 2600

Patent

active

058414630

ABSTRACT:
An apparatus and method of manufacturing a laser print head include the steps of mounting a laser array (70) on a print head block (80), measuring misalignment of the laser array (70) to determine a correction factor, mounting a cylinder lens (20) on a cylinder lens holder (25), inducing a predetermined bend into the cylinder lens (20) corresponding to the correction factor by allowing the cylinder lens (20) to sag on upright posts (26) of the cylinder lens holder (25), attaching the cylinder lens (20) to a sub-mount (30), attaching flexures (50) to the sub-mount (30), aligning the cylinder lens (20) to the laser array (70), and attaching the flexures (50) to the print head block (80). The bend in the cylinder lens corrects for misalignment in the laser array (70) so that the array of spots at the image plane is in an approximately straight line. In one embodiment, the sub-mount and cylinder lens have approximately the same thermal coefficient of expansion.

REFERENCES:
patent: 4383755 (1983-05-01), Fedder et al.
patent: 4496209 (1985-01-01), Itoh et al.
patent: 4639072 (1987-01-01), Itoh et al.
patent: 4804981 (1989-02-01), Prakash et al.
patent: 5218413 (1993-06-01), Kanai
patent: 5515391 (1996-05-01), Endriz
patent: 5646674 (1997-07-01), Bacon et al.

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