Wobble correction lens with binary diffractive optic surface and refractive cylindrical surface

  • US 5,208,701 A
  • Filed: 12/24/1991
  • Issued: 05/04/1993
  • Est. Priority Date: 12/24/1991
  • Status: Expired due to Term
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First Claim
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1. An optical scanning system for correction of wobble and correction of cross-scan field curvature comprising:

  • a rotating polygon mirror with a plurality of facets,means for generating a collimated laser beam directed onto one of said facets,a lens which focuses said beam reflected off said one of said facets to a scan line, said lens comprising a binary diffractive optic lens surface and a refractive cylindrical surface to correct for wobble of said beam at said scan line and to correct the cross-scan field curvature of said beam at said scan line.

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  • 3 Assignments
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