Scanner with reflective pyramid error compensation

Details Scanner with reflective pyramid error compensation Scanner with reflective pyramid error compensation

1979-03-26

1981-01-27

Corbin, John K.

G02B 271

Patent

active

042471605

ABSTRACT:
A laser beam scanner having a positive cylinder mirror located between the polygon scanner and the photosensitive surface. The positive cylinder mirror, which has power in the sagittal (cross-scan) plane but no power in the tangential (scan) plane, minimizes scan-to-scan spot position errors due to angular alignment errors between adjacent facets of the polygon scanner without introducing significant sagittal field curvature. Residual sagittal field curvature is compensated for by providing a negative refractive cylinder lens, with power in the sagittal plane, between the cylindrical mirror and the polygon scanner.

REFERENCES:
patent: 3750189 (1973-07-01), Fleischer
patent: 3973826 (1976-08-01), Lobb
patent: 3995110 (1976-11-01), Starkweather
patent: 4054360 (1977-10-01), Oosaka et al.
patent: 4070089 (1978-01-01), Grafton
patent: 4116527 (1979-09-01), Sick
patent: 4123135 (1978-10-01), Rabedeau

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