Optical: systems and elements – Lens – With diverse refracting element
Reexamination Certificate
2006-04-04
2006-04-04
Lester, Evelyn A. (Department: 2873)
Optical: systems and elements
Lens
With diverse refracting element
C359S707000, C359S741000, C359S742000, C359S798000, C359S800000, C359S806000, C359S808000, C359S719000, C372S101000, C235S454000, C235S455000, C235S462060
Reexamination Certificate
active
07023626
ABSTRACT:
The invention relates to an optical device for focusing a laser beam, comprising a source of emission of a laser beam, for example a substantially elliptic and astigmatic laser beam, a focusing lens of the laser beam and first aperture adapted to select a central portion of the laser beam. The first aperture is directly applied on the focusing lens, and comprises a coating made of a substantially opaque material which are applied (for example, by spraying, sputtering, evaporation, printing, painting) on a peripheral portion of a front surface of the focusing lens so as to allow the propagation of the central portion of the laser beam and obstruct the propagation of a surrounding portion of beam. The device of the invention is extremely simple from the constructive point of view, and is inexpensive and small-sized.
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DATALOGIC S.p.A.
Lester Evelyn A.
Nixon & Vanderhye P.C.
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