Prevention of stray light reflections in a raster output scanner

Details Prevention of stray light reflections in a raster output scanner Prevention of stray light reflections in a raster output scanner

1992-12-10

1993-12-14

Arnold, Bruce Y.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359216, G02B 2608

Patent

active

052708497

ABSTRACT:
In an overfilled ROS polygon architecture, stray reflection from facets adjacent the completely filled (illuminated) facet are prevented from affecting the scan line images by aligning the optical axis of the pre-polygon and post-polygon optical components at an optimum angle .phi.' so that the stray light reflections at the photoreceptor occur only at non-image forming scan times (outside the image scan time). The optimum angle .phi.' is expressed by the relationship .phi.'=2(.OMEGA..+-.1/2.theta.) where .OMEGA. is given by the expression 360/X, X being the number of scanning facets, and .theta. being the scanning angle.

REFERENCES:
patent: 4230902 (1980-10-01), Hug et al.
patent: 4443695 (1984-04-01), Kitamura
patent: 4941721 (1990-07-01), Banton et al.
patent: 5151586 (1992-09-01), Sato et al.

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