Patent ID: 7158240

Claim:
An apparatus for collecting data to calculate and display at least one parameter of a configuration having at least first and second at least partially transparent surfaces, said first surface approximately parallel to said second surface, comprising: means for illuminating said first surface of said configuration with energy, said energy comprising components, each component having at least a unique wavelength, a first said component provided as refraction of said energy from said first surface and a second said component provided as reflection of said energy from said second surface at each of said wavelengths; means for collecting said first and second components said means for collecting located near said first surface; and means for measuring at least one characteristic of each of said first and second components and determining establishing and displaying at least one relationship between at least one said first component and one said second component of a pair comprising a first said component and a second said component collected at the same time, wherein said displaying provides to a user of said apparatus at least one said parameter.