Patent ID: 8159666
Filing Date: 2012-04-17
Classification: A61B,A61C,G01J,G01N

Abstract:
1. A method in a spectral measurement apparatus comprising the steps of: receiving light with a plurality of sensors, wherein each sensor generates an output signal having a frequency proportional to an intensity of light received by the sensor; generating at least a first signal having a frequency proportional to an intensity of light received by a first sensor of a first wavelength or spectral band; generating at least a second signal having a frequency proportional to an intensity of light received by a second sensor of a second wavelength or spectral band; and generating at least a third signal having a frequency proportional to an intensity of light received by a third sensor of a third wavelength or spectral band; wherein a spectral characteristic of the received light is determined based on at least the first, second and third signals; wherein the at least first, second and third signals are coupled to a processing element and input to the processing element in parallel, wherein the spectral characteristic is determined based on measuring a frequency or period of the at least first, second and third signals; wherein spectral data based on the determined spectral characteristic is generated by the processing element and displayed on a display device for perception by a viewer or transmitted to a data interface for transmission to an electronic device external to the spectral measurement apparatus.