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Apparatus and method for measuring optical characteristics of an object

  • US 6,222,620 B1
  • Filed: 07/27/2000
  • Issued: 04/24/2001
  • Est. Priority Date: 07/01/1997
  • Status: Expired due to Term
First Claim
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1. A method comprising the steps of:

  • moving a probe in proximity to an object through relative movement between the probe and the object, wherein light is provided to the object from one or more light sources, and wherein the probe receives light from the object trough a plurality of light receivers, wherein the plurality of light receivers comprise one or more first light receivers and one or more second light receivers, wherein the one or more first light receivers have a first numerical aperture and the one or more second light receivers have a second numerical aperture different from the first numerical aperture determining the intensity of light received by more than one of the light receivers; and

    measuring the optical characteristics of the object, wherein the measurement produces data indicative of the optical characteristics of the object and includes at least first and second measurements with the probe at first and second distances from the object;

    wherein light from the one or more of the first or second light receivers is coupled to one or more sensors through a color gradient filter.

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