Zobrazeno 1 - 7
of 7
pro vyhledávání: '"Hidemitsu Toba"'
Publikováno v:
Optical Review. 27:81-89
The finite-difference time-domain (FDTD) method, which is often used to solve Maxwell's equations, has been proposed to solve the optical diffusion equations to simulate light propagation in turbid media such as biological tissue. Finite-difference m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cdac601bd3876ae9215c7366f0d02647
https://doi.org/10.1007/s10043-019-00567-7
https://doi.org/10.1007/s10043-019-00567-7
Publikováno v:
Applied Optics. 61:597
It has been shown in previous literature that nearly diffraction limited focusing is possible by a doublet metalens up to almost 30 deg. This result indicates that metalenses can work well, even at oblique incidence. Although various meta-atoms have
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::faf38f290ce920505ac0b71455b90661
https://doi.org/10.1364/ao.446491
https://doi.org/10.1364/ao.446491
Publikováno v:
Applied Optics. 59:9159
We propose a model-based fringe analysis technique that enables the Fourier transform method to analyze dense fringe patterns with large phase variations. The conventional Fourier-transform method has a limited dynamic range of measurable phase becau
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6045c580e49a96670889f4c2467dc858
https://doi.org/10.1364/ao.402415
https://doi.org/10.1364/ao.402415
Autor:
Hidemitsu Toba, Zhiqiang Liu, Saori Udagawa, Naoki Fujiwara, Shigeru Nakayama, Takashi Gemma, Mitsuo Takeda
Publikováno v:
Optical Engineering; Aug2019, Vol. 58 Issue 8, p1-6, 6p
Publikováno v:
SPIE Proceedings.
Phase profiles obtained by phase shifting interferometry often include undesirable concentric ripple-noises, like "bull's-eye patterns" which are caused by scattering from defects on surfaces of optical elements in interferometers. We propose a numer
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d90e6626828742fc070fb09cb56e4a5c
https://doi.org/10.1117/12.888918
https://doi.org/10.1117/12.888918
Autor:
Mitsuo Takeda, Naoki Fujiwara, Saori Udagawa, Shigeru Nakayama, Hidemitsu Toba, Takashi Gemma, Zhiqiang Liu
Publikováno v:
SPIE Proceedings.
We propose a method for reducing artifactual phase errors inherent to the Fourier transform method (FTM) for fringe analysis. The phase obtained by the FTM is subject to ripple errors at the boundary edges of the fringe pattern where fringes become d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2fc96851ccc7c3cbe4a70098284df46e
https://doi.org/10.1117/12.825200
https://doi.org/10.1117/12.825200
Autor:
Satoru Odate, Tetsuya Koike, Katsumi Sugisaki, Ayako Sugaya, Chiaki Koike, Katsura Otaki, Kiyoshi Uchikawa, Hidemitsu Toba
Publikováno v:
Optics Express. 19:14268
Nyquist sampling theorem in an image calculation with angular spectrum method restricts a propagation distance and a focal length of a lens. In order to avoid these restrictions, we studied suitable expressions for the image computations depending on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a2277589913b999cf58779fb77d0ef6f
https://doi.org/10.1364/oe.19.014268
https://doi.org/10.1364/oe.19.014268