Laser leveling target with fresnel lens system

Details Laser leveling target with fresnel lens system Laser leveling target with fresnel lens system

1996-04-29

1998-10-06

Henry, Jon W.

Optical: systems and elements

Diffraction

From zone plate

359742, 356399, G02B 2744, G02B 308, G01B 1114

Patent

active

058186336

ABSTRACT:
Targets for use with scanning light beam leveling/marking devices, are constructed with their elements assembled as unitary target structure. The lens and beam divider functions are provided by optical quality fresnel lenses attached to or formed on a polycarbonate block, these parts thus can be made essentially an integral element. These special fresnel lens which are optically equivalent of the input lens and beam dividing axicon, and the viewing screen diffuser function provided by a frosted viewing plate. A separate fresnel lens is mounted alongside the beam dividing lenses and functions to provide a reference image on the viewing screen. The optical path for the impinging light beam (after it is divided) may be transmitted directly through the body block, from the input to the view window, or through a reflector surface at a side of the block, the block body of the target functioning as a waveguide.

REFERENCES:
patent: 5095629 (1992-03-01), Klemer et al.
patent: 5570189 (1996-10-01), Salmon
patent: 5710647 (1998-01-01), Perchak

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