23 July 2008 Novel direct vision prism and Wollaston prism assembly for diffraction limit applications
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We propose two types of novel prisms; 1) a direct vision prism with approximately linear angular dispersion as a function of wavelength (Liner dispersion prism: LDP) suitable for a wide range spectrometer, and 2) a novel Wollaston prism assembly (WPA) suitable for a polarizing imager and spectro-polarimeter with a wide wavelength coverage. LDP composes several kinds of glasses or plastics or crystals. Angular dispersion of LDP is enlarged by employment of with some kind of plastic. LDPs, which are employed polycarbonate and Cytop (Amorphous fluorocarbon resin), provide approximately linear angular dispersion in ultraviolet and visible wavelength, respectively. WPA is composed of two or three kinds of Wollaston prism with different birefringent crystals. WPA provides an achromatic angular separation or an angular separation with linear dispersion. These prisms will enable us to achieve a diffraction-limited capability on next generation telescopes of both ground-based and space-borne.
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Noboru Ebizuka, Noboru Ebizuka, Hideo Yokota, Hideo Yokota, Fumiyoshi Kajino, Fumiyoshi Kajino, Koji S Kawabata, Koji S Kawabata, Masanori Iye, Masanori Iye, Shuji Sato, Shuji Sato, } "Novel direct vision prism and Wollaston prism assembly for diffraction limit applications", Proc. SPIE 7018, Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation, 70184S (23 July 2008); doi: 10.1117/12.788528; https://doi.org/10.1117/12.788528

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