Patent · US Active

Controlling beam intensity in ophthalmic illumination systems using serial rotatable shapes

US7708409B1 · kind B1 · utility

0Cited by
3References
20Claims
0Family size

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Key dates

Filing dateDec 11, 2008
Grant dateMay 4, 2010
Priority date—
Expiry dateDec 11, 2028

Classification

  • Technology area (CPC A)Human Necessities
  • CPC primaryA61F9/007
  • WIPO fieldMedical technology
  • WIPO sectorInstruments

Abstract

An ophthalmic illumination system includes planar shapes serially positioned in a path for a collimated beam, along an optical axis. The shapes are rotationally symmetric with one another relative to the optical axis. Each shape has a central rotational axis intersecting the optical axis. Generally wedge-shaped segments of the shapes are spaced apart around and converge at the optical axis to provide generally wedge-shaped apertures to the beam between the segments. The shapes are rotatable on the rotational axes along the optical axis to assume a plurality of configurations to vary intensity of the beam. The beam can fill spatial modes at substantially all radii of the optical fiber entrance pupil.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.