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  1. Article ; Online: Absolute phase retrieval of shiny objects using fringe projection and deep learning with computer-graphics-based images.

    Ueda, Kazumasa / Ikeda, Kanami / Koyama, Osanori / Yamada, Makoto

    Applied optics

    2022  Volume 61, Issue 10, Page(s) 2750–2756

    Abstract: Fringe projection profilometry is a high-precision method used to measure the 3D shape of an object by projecting sinusoidal fringes onto an object. However, fringes projected onto a metallic or shiny object are distorted nonlinearly, which causes ... ...

    Abstract Fringe projection profilometry is a high-precision method used to measure the 3D shape of an object by projecting sinusoidal fringes onto an object. However, fringes projected onto a metallic or shiny object are distorted nonlinearly, which causes significant measurement errors. A high-precision measurement method for shiny objects that employs computer graphics (CG) and deep learning is proposed. We trained a deep neural network by projecting fringes on a shiny object in CG space. Our results show that the method can reduce the nonlinear fringe distortion caused by gloss in real space.
    Language English
    Publishing date 2022-04-26
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4522
    ISSN (online) 1539-4522
    DOI 10.1364/AO.450723
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: 1.8  µm band broadband hybrid light source employing a combination of a super luminescent diode and thulium-doped fiber amplifier.

    Ota, Kazuya / Ono, Jun / Mori, Hiroshi / Ono, Hirotaka / Koyama, Osanori / Ikeda, Kanami / Yamada, Makoto

    Applied optics

    2021  Volume 60, Issue 30, Page(s) 9419–9424

    Abstract: We have proposed a broadband hybrid light source that combines a super luminescent diode (SLD) and thulium-doped fiber amplifier (TDFA) and operates in the 1.8 µm band. This light source can improve the characteristics of the output spectrum by ... ...

    Abstract We have proposed a broadband hybrid light source that combines a super luminescent diode (SLD) and thulium-doped fiber amplifier (TDFA) and operates in the 1.8 µm band. This light source can improve the characteristics of the output spectrum by amplifying the output light of the SLD with TDFA. In this study, we investigate the dependence of the output spectral characteristics of the hybrid broadband light source on the thulium-doped fiber (TDF) length used in the TDFA as well as the output spectra of three newly developed SLDs of 1660, 1690, and 1730 nm bands. In the evaluation of the output bandwidth, there are various definitions of output bandwidth, but we adopted the bandwidth with power density of over -40
    Language English
    Publishing date 2021-11-11
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4522
    ISSN (online) 1539-4522
    DOI 10.1364/AO.439019
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  3. Article ; Online: Low-cost optical fiber temperature-sensing system employing optical transceivers for Ethernet and long-period fiber grating.

    Koyama, Osanori / Matsui, Makoto / Kagawa, Takuro / Suzuki, Yuta / Ikeda, Kanami / Yamada, Makoto

    Applied optics

    2019  Volume 58, Issue 9, Page(s) 2366–2371

    Abstract: Optical fiber sensors have numerous advantages over electrical sensors. However, in some cases, sensing systems based on optical fiber sensors are inferior to electrical sensors in terms of cost because expensive instruments are required. Therefore, cost- ...

    Abstract Optical fiber sensors have numerous advantages over electrical sensors. However, in some cases, sensing systems based on optical fiber sensors are inferior to electrical sensors in terms of cost because expensive instruments are required. Therefore, cost-effective options must be developed. Here, inexpensive optical transceivers (OTRs) for Ethernet were used instead of a broadband light source and optical spectrum analyzer, and a CO
    Language English
    Publishing date 2019-01-31
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4522
    ISSN (online) 1539-4522
    DOI 10.1364/AO.58.002366
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

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