Abstract

A nondestructive technique for the measurement of infrared spectra of thick, hard, and dark materials has been studied with the use of external reflection spectroscopy. The distortion of the absorption bands which is due to optical effects can be minimized with the use of parallel polarized light which is incident at Brewster's angle. With this technique, it is impossible to observe over-absorption even if the material has a semi-infinite thickness. Also, this technique can be applied to the study of thin films on polymer substrates.

Brewster angles in reflection by uniaxial crystals

John Lekner
J. Opt. Soc. Am. A 10(9) 2059-2064 (1993)

Reflection by uniaxial crystals: polarizing angle and Brewster angle

John Lekner
J. Opt. Soc. Am. A 16(11) 2763-2766 (1999)

Reflection at oblique incidence and the existence of a Brewster angle

John Lekner
J. Opt. Soc. Am. A 2(2) 186-188 (1985)

Spin polarization separation of light reflected at Brewster angle

Yang Lv, Zefang Wang, Yu Jin, Mingtao Cao, Liang Han, Pei Zhang, Hongrong Li, Hong Gao, and Fuli Li
Opt. Lett. 37(5) 984-986 (2012)

Brewster angle prism retroreflectors for cavity enhanced spectroscopy

Kevin K. Lehmann, Paul S. Johnston, and Paul Rabinowitz
Appl. Opt. 48(16) 2966-2978 (2009)