Optimization of high precision rhomb-type achromatic retarders
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1.
Department of Physics, Xingyi Normal University for Nationalities, Xingyi 562400, China;
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2.
Institute of Laser Research, Qufu Normal University, Qufu 273165, China;
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3.
Department of Physics and Engineering Technology, Sichuan University of Arts and Science, Dazhou 635000, China
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Received Date:
2010-04-22
Accepted Date:
2010-06-17
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Abstract
In order to improve precision of rhomb-type achromatic A/4 phase retarders,based on the positive and negative delay error of A/4 phase retarders and larger refractive index,high precision retarders were designed.The retarder was analyzed and validated in experiments,and the data of high precision λ/4 phase retarder were obtained.It is shown at the retardation curve within the range of 350nm to 2000nm that retardation is 90°at two wavelengths and the maximal retardance error is smaller than 0.04°.Comparing with conventional retarders,the new retarder not only extends achromatic range,but also improves achromatic precision.The results are helpful to design high precision λ/4 phase retarders.
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