Abstract: A measurement system includes a focused light source, a first mirror, a plurality of first lenses, a second mirror, a plurality of second lenses and an imaging device. The first mirror is positioned on a first side of a sample and configured to receive light from the light source. The plurality of first lenses are positioned between the first mirror and the sample. The second mirror is positioned on a second side of the sample. The plurality of second lenses are positioned between the second mirror and the sample. The imaging device is positioned adjacent to the second mirror and configured to receive the light from the light source after the light propagates a number of propagations between the first mirror and the second mirror, and through the first lenses and the second lenses.