Patent
1977-09-15
1979-05-22
Henry, Jon W.
G02B 2717
Patent
active
041556208
ABSTRACT:
An optical scanning system in which a focused light beam is scanned across an image plane by a rotating or reciprocating scan mirror and wherein the field curvature of the focused light beam is substantially reduced by moving the point of intersection between the optic axis of the scanning light beam and the scan mirror as a function of the rotation or reciprocation of the scan mirror and wherein movement of that point of intersection is controlled by having the distance R between the mirror and its point of rotation or reciprocation and the distance h between the image plane and the point of intersection of the optic axis of the scanning beam and the scan mirror approximate the relationship R=2.sqroot.2h. In the case of the scan mirror having a reciprocating movement, the optical scanning system compensates for non-linearity in the sweep of the scanning light beam across the image plane by utilizing a non-linear lever system to reciprocate the scan mirror.
REFERENCES:
patent: 3360659 (1967-12-01), Young
patent: 3734605 (1973-05-01), Yevick
patent: 3764192 (1973-10-01), Wheeler
patent: 3973825 (1976-08-01), Starkweather
patent: 4025154 (1977-05-01), Yuta
Henry Jon W.
Xerox Corporation
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