Illuminating device and plant growth regulation method

    公开(公告)号:US09927095B2

    公开(公告)日:2018-03-27

    申请号:US14059060

    申请日:2013-10-21

    CPC classification number: F21V9/14 A01G7/045 G02B5/3083 Y02P60/146

    Abstract: The present invention provides an illuminating device that makes it possible to reduce the number of members for regulating a polarization state and can irradiate light having natural color shades without decreasing energy efficiency of light irradiation, and a plant growth regulation method using the illuminating device. The illuminating device of the present invention includes a light-emitting light source and a polarization state regulation member that regulates a polarization state of the light-emitting light source, in which the polarization state of a wavelength region of a portion of emission wavelengths is changed to circular polarization, and a degree of circular polarization of light in a wavelength band for regulation among the light rays to be irradiated is 0.3 or higher. In a preferable embodiment, a width of at least one wavelength band for regulation of the polarization state regulation member is from 60 nm to 250 nm.

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