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Illumination of diffusely scattering media

  • US 8,692,990 B2
  • Filed: 03/14/2008
  • Issued: 04/08/2014
  • Est. Priority Date: 03/15/2007
  • Status: Active Grant
First Claim
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1. A method comprising:

  • locating a delivery filter adjacent to a diffusely scattering sample; and

    directing a beam of incident light of a predetermined wavelength through the delivery filter at a beam angle of incidence, and to the sample,the delivery filter having characteristics such that reflection of said incident light is dependent upon angle of incidence of said light at the filter, and such that at least 50% of the incident light of the predetermined wavelength which is diffusely scattered back out of the sample to arrive at the delivery filter is reflected by the delivery filter back towards the sample.

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