Importance

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Abstract

An imaging apparatus comprises a first optical fiber configured to deliver a source beam of light generated by a light source and a polarizing beam splitter configured to polarize the source beam of light and direct diffusely reflected light toward a collection fiber optically coupled to an optical detector. The imaging apparatus also comprises a mirror configured to reflect the polarized beam of light onto the lens and direct reflected light away from a lens. The lens is configured to focus the polarized source beam of light onto an area of sample material and focus diffusely reflected light from the sample material into a reflection beam. The imaging apparatus also comprises a plano-convex curvature matching window disposed at a focal plane of the lens, wherein a convex surface of the curvature matching window is substantially matched to the focal plane curvature of the imaging lens.

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First Claim