Effects of optical axis direction on optical path difference and lateral displacement of Savart polariscope |
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Authors: | Zhang Chun-Min Ren Wen-Yi and Mu Ting-Kui |
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Institution: | School of Science, Xi'an Jiaotong University, Xi'an 710049, China; MOE Key Labaratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an 710049, China |
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Abstract: | A simple method is applied to calculating the optical
path difference (OPD) of a plane parallel uniaxial plate with an
arbitrary optical axis direction. Then, the theoretical expressions
of the OPD and lateral displacement (LD) of Savart polariscope under
non-ideal conditions are obtained exactly. The variations of OPD and
LD are simulated, and some important conclusions are obtained when
the optical axis directions have an identical tolerance of \pm
1^{{\circ}}. An application example is given that the tolerances of
optical axis directions are gained according to the spectral
resolution tolerances of the stationary polarization interference
imaging spectrometer (SPIIS). Several approximate formulae are
obtained for explaining some conclusions above. The work provides a
theoretical guidance for the optic design, crystal processing,
installation and debugging, data analysis and spectral
reconstruction of the SPIIS. |
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Keywords: | stationary polarization interference imaging spectrometer Savart polariscope optical axis optical path difference |
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