Opto-mechanical apparatus for moving and scanning in an optical

Details Opto-mechanical apparatus for moving and scanning in an optical Opto-mechanical apparatus for moving and scanning in an optical

1996-12-18

1998-04-07

Font, Frank G.

Optical: systems and elements

Lens

With support

359823, 359818, 359829, G02B 702

Patent

active

057371350

ABSTRACT:
An opto-mechanical apparatus for moving and scanning in an optical system comprises a step motor, a timing belt, a first lead screw carrying a first optical assembly, and a second lead screw carrying a second optical assembly. Each of the lead screws has a spiral thread forming a lead path. The lead path of the second lead screw is twice as long as the lead path of the first lead screw. Each lead screw has a gear fastened to its one end. The timing belt connects the rotation axis of the step motor and the two gears on the lead screws. When the step motor rotates, the two gears are driven by the timing belt. The two lead screws are also rotated by the gears. The first optical assembly moves twice as fast as the second optical assembly because the two gears have identical radii but the second lead path is twice long. The different distances traveled by the two optical assemblies ensure that the optical system has a constant optical resolution while scanning.

REFERENCES:
patent: 5381264 (1995-01-01), Wickholm et al.
patent: 5594589 (1997-01-01), Chon

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