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    ULTRAVIOLET RAY MEASURING APPARATUS
    2.
    发明专利
    ULTRAVIOLET RAY MEASURING APPARATUS 未知

    公开(公告)号：CA2014344A1

    公开(公告)日：1990-10-12

    申请号：CA2014344

    申请日：1990-04-11

    Applicant: TORAY INDUSTRIES

    Inventor： HAYASHI MUTSUMI ,  TAKAMURA RYOJI ,  YAMAZAKI CHIKAYASU ,  UEDA MINORU ,  KUMO ICHIRO

    IPC: G04G99/00 ,  A61N5/06 ,  G01J1/00 ,  G01J1/02 ,  G01J1/04 ,  G01J1/10 ,  G01J1/16 ,  G01J1/42 ,  G01J1/44

    Abstract: An ultraviolet ray measuring, apparatus is provided which comprises first and second photodiodes having substantially the same spectral sensitivity at least in an ultraviolet band, and a first optical filter arranged in front of a light-receiving face of the second photodiode, for shielding only light of at least a part of the ultraviolet band , and measures the light intensity and its accumulated value in accordance with the difference between electric signals output from the first and second photodiodes. It is preferable that a second optical filter, which has a main transmitting band in the ultraviolet band and a sub-transmitting band in the visible light range, be arranged in front of the light-receiving faces of the first and second photodiode. A multi-step bar graph display device displays indexes, such as an MED multiple value and an SPF value, which represent the measured light intensity and accumulated value in association with a reference MEL) value, so that this apparatus can suitably serve as a sunburn monitor.

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