Apparatus and method for measuring optical characteristics of an object

  • US 6,490,038 B1
  • Filed: 09/15/1999
  • Issued: 12/03/2002
  • Est. Priority Date: 01/02/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. An apparatus for determining a characteristic of an object or material comprising:

  • one or more light receivers receiving light from the object or material;

    a plurality of sensors receiving light from the one or more light receivers, wherein the sensors generate a plurality of signals having a frequency proportional to the light intensity received by the one or more light receivers; and

    a processor coupled to receive the signals, wherein the processor determines the characteristic based on the signals;

    wherein the light passes through a filter prior to being coupled to the sensors, wherein spectral characteristics are determined based on measuring a period of a plurality of the signals.

View all claims
  • 4 Assignments
Timeline View
Assignment View