Patent ID: 7119903

Claim:
A computerized method for estimating scattering of electromagnetic radiation from a surface, the method comprising: providing a distribution expression that includes a first integral over a source solid angle, a second integral over a sample area, third integral over detector solid angle, and an integrand that includes a differential-scattering profile; approximating the first and second integrals to be the second integral, wherein the source electromagnetic radiation is approximated to be collimated; approximating the second and third integral to be the third integral, wherein a detector for detecting the electromagnetic radiation scattered from the surface is approximated to be a point detector; transforming the coordinates of the third integral over detector solid angle to first and second dimensions in cosine space to form a fourth integral, wherein the surface is approximated to be shift invariant; integrating over the first dimension of the fourth integral; differentiating the fourth integral with respect to the second dimension to generate the differential-scattering profile; and generating an optical system design based on the differential-scattering profile.