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Variable optical attenuator

  • US 6,374,032 B1
  • Filed: 04/22/1999
  • Issued: 04/16/2002
  • Est. Priority Date: 04/22/1999
  • Status: Expired due to Fees
First Claim
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1. An attenuator for attenuating an optical beam, comprising a rotary, optically opaque eccentric or eccentrically rotatable blocker defining a center of rotation and having a radial perimeter of a gradually changing radius relative to the center of rotation, the rotary blocker disposed to rotate in a plane transverse to the optical beam such that the radial perimeter of the blocker gradually moves into or out of path of the optical beam to block or unblock the beam correspondingly.

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