Lens for scanning devices

Details Lens for scanning devices Lens for scanning devices

1987-12-03

1989-05-09

Corbin, John K.

350 68, G02B 914, G02B 2610

Patent

active

048283754

ABSTRACT:
It is a lens comprising three elements for a scanning device; the lens is particularly for providing a linear scanning. A beam enters the lens from its front focus by rotating a constant angular velocity, will become a beam in parallel with the axis of the lens and moving at a contant speed when passing through the lens; the distance H between the beam and the axis of the lens, the contained angle .theta. between the incident beam and the axis of the lens have the relation of H=KF.theta., in which F is the focal length of the lens, and K is a constant.

REFERENCES:
patent: 4531815 (1985-07-01), Konno et al.

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