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Direct and indirect light diffusing devices and methods

  • US 8,098,433 B2
  • Filed: 12/11/2009
  • Issued: 01/17/2012
  • Est. Priority Date: 12/11/2009
  • Status: Active Grant
First Claim
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1. A daylighting apparatus comprising:

  • an internally reflective tube configured to direct daylight from a first end of the tube and a second end of the tube opposite the first end; and

    a diffuser positioned at the second end of the tube, the diffuser comprising a first optical structure configured such that, when the day lighting apparatus is installed with the first end positioned outside a room and the second end positioned to provide light to the room;

    a reflected portion of the daylight is directed towards at least one ceiling or upper wall surface of the room; and

    a transmitted portion of the daylight is directed towards at least one floor or lower surface of the room;

    wherein the first optical structure comprises at least one reflective surface interrupted by a plurality of openings configured to permit at least some of the transmitted portion of the daylight to pass through the first optical structure.

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