Reflectance estimating method

Details Reflectance estimating method Reflectance estimating method

2007-10-16

2007-10-16

Toatley, Jr., Gregory J. (Department: 2877)

Optics: measuring and testing

Of light reflection

With diffusion

C356S445000

Reexamination Certificate

active

10411276

ABSTRACT:
At first, a sample for obtaining light measurement data is set to obtain reflectances. After setting an arbitrary wavelength λi, a principal component analysis is executed to obtain an eigenvalue 1 and an eigenvector b. Then a basic equation for reflectance is determined by deriving a coefficient k, utilizing a known reflectance of an object of which reflectance is to be estimated. Thereafter a process of deriving a reflectance at an arbitrary displacement angle is executed for all the wavelengths, for example over a visible wavelength range. In this manner, the reflectance of an object at an arbitrary displacement angle can easily be obtained by utilizing the basic equation for the reflectance derived from the eigenvector obtained from the principal component analysis of the measured data.

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