Optical: systems and elements – Lens – Including a nonspherical surface
Patent
1998-10-20
2000-05-30
Mack, Ricky
Optical: systems and elements
Lens
Including a nonspherical surface
359710, G02B 302, G02B 306
Patent
active
060697482
ABSTRACT:
According to one aspect of the present invention, a laser line generator system comprises a laser source providing a diverging laser beam and a single lens element intersecting the diverging laser beam. The single lens element has a negative optical power in one cross section and a positive optical power in another cross section. This single lens element shapes the diverging laser beam to provide a laser line at an object surface. According to a second aspect of the present invention, the lens element has a first surface that is adjacent to the laser diode. This first surface is a toroidal surface. According to one preferred embodiment of the present invention, the first surface is concave about a center of curvature in at least one cross section and, in this cross section the laser diode is located at the center of curvature. According to another aspect of the present invention, a laser line generator system includes a laser source providing a diverging laser beam and a single lens element intersecting the diverging laser beam. The single lens element has a first surface with positive optical power in at least one cross section and a second surface with optical power only in one direction. This first surface is adjacent to the laser source.
REFERENCES:
patent: 4321551 (1982-03-01), Bleil et al.
patent: 5283694 (1994-02-01), Frady
patent: 5499262 (1996-03-01), Nakata
patent: 5570232 (1996-10-01), Yoshikawa et al.
patent: 5629808 (1997-05-01), Powell
Eastman Kodak Company
Mack Ricky
Short Svetlana Z.
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