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Illuminator method and device

  • US 8,139,909 B2
  • Filed: 05/17/2010
  • Issued: 03/20/2012
  • Est. Priority Date: 08/10/2006
  • Status: Expired due to Fees
First Claim
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1. An apparatus comprising:

  • a first toroidal ray guide defining an axis of revolution and having a toroidal entrance pupil adapted to image radiation from a non-point source that is incident on the entrance pupil at an angle to the axis of revolution between 40 and 140 degrees, said first toroidal ray guide having a first imaging surface opposite the entrance pupil; and

    a second ray guide also defining the axis of revolution and having a second imaging surface adjacent to the first imaging surface and an exit pupil opposite the second imaging surface,wherein the first and second ray guides are arranged to substantially image the entrance pupil to the exit pupil.

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