Abstract
Cary model 14 spectrophotometers like other prism and grating instruments have
polarization characteristics that affect the transmittance values of anisotropic
or dichroic materials. In the uv, the degree of polarization is fairly constant
from 3000 Å to 4000 Å, whereas in the visible, it shows some
variation with wavelength. In the near ir, the variation of the degree of
polarization with wavelength is large, showing sharply defined maxima at
approximately 0.77 μ, 0.97 μ,
and 1.27 μ. The spectral transmittance of optical
quality sapphire, a uniaxial crystal, cut at 45°, 60°, and
90° to the c axis, showed undulations for certain
orientations of the privileged directions.
© 1968 Optical Society of America
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