Yoshitaka Yoneda
Hoya Corporation
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Publication
Featured researches published by Yoshitaka Yoneda.
Applied Optics | 1988
Shigeaki Ohmi; Hiroyuki Sakai; Yoshiyuki Asahara; Shin Nakayama; Yoshitaka Yoneda; Tetsuro Izumitani
Gradient-index rod lenses with a parabolic-index profile have been fabricated by a double Na-Ag ion-exchange process, and their optical characteristics have been evaluated. The numerical aperture and minimum focused spot diameter of the 2-mm diam rod lens were 0.58 and 2.5 microm for lambda = 0.63 microm, respectively. Because of the high diffusing rate for Ag ions, this technique offers the possibility of making large-sized (larger than 10 mm-diam) rod lenses for photographic uses.
Applied Optics | 1986
Yoshiyuki Asahara; Hiroyuki Sakai; Sigeaki Ohmi; Shin Nakayama; Yoshitaka Yoneda; Tetsuro Izumitani
A near-parabolic profiled 1-D lens with high N.A. (=0.70) has been fabricated by an indiffusion ion exchange and cementing technique. Maximum longitudinal aberration is lower than 0.2 mm all over the lens thickness. The focused beamwidth is ~5 μm.
Archive | 1986
Yoshiyuki Asahara; Shigeaki Omi; Hiroyuki Sakai; Shin Nakayama; Yoshitaka Yoneda
Archive | 1987
Hiroyuki Sakai; Yoshiyuki Asahara; Shigeaki Omi; Shin Nakayama; Yoshitaka Yoneda
Archive | 1999
Yoshitaka Yoneda; Shozo Morimoto; Toshiharu Yamashita
Archive | 2002
Toshiharu Yamashita; Yoshitaka Yoneda
Archive | 1988
Hiroyuki Sakai; Yoshiyuki Asahara; Shigeaki Omi; Shin Nakayama; Yoshitaka Yoneda
Archive | 1996
Yoshitaka Yoneda; Shozo Morimoto; Toshiharu Yamashita
Archive | 1992
Yoshiyuki Asahara; Shigeaki Ohmi; Hiroyuki Sakai; Yoshitaka Yoneda
Archive | 2001
Toshiharu Yamashita; Yoshitaka Yoneda; 俊晴 山下; 嘉隆 米田
