Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Keisuke Hayashi and Mitsunori Saito,Tunable retarder made of pentaprisms and liquid crystal,SPIE Proceedings,0277-786X,SPIE,2011-09-08,8114,,811412,https://cir.nii.ac.jp/crid/1872835442848099072,https://doi.org/10.1117/12.891996