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Title:
ILLUMINATION DEVICE AND PLANT GROWTH CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2012/144422
Kind Code:
A1
Abstract:
The invention provides an illumination device capable of reducing the number of members for controlling polarization and of irradiating light of a natural tone without reducing the energy efficiency of the light irradiation, and a plant growth control method using said illumination device. This illumination device is equipped with a light-emitting light source and a polarization-controlling member that controls the polarization of said light-emitting light source. The polarization of a wavelength zone comprising a portion of the wavelengths of the emitted light is changed to circularly polarized light. Of the irradiated light, the degree of circular polarization of light in the controlled wavelength band is 0.3 or more. Embodiments and the like in which at least one controlled wavelength bandwidth of said polarization-controlling member is 60 nm to 250 nm are preferable.

Inventors:
ICHIHASHI MITSUYOSHI (JP)
USAMI YOSHIHISA (JP)
MAJIMA WATARU (JP)
Application Number:
PCT/JP2012/060053
Publication Date:
October 26, 2012
Filing Date:
April 12, 2012
Export Citation:
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Assignee:
FUJIFILM CORP (JP)
ICHIHASHI MITSUYOSHI (JP)
USAMI YOSHIHISA (JP)
MAJIMA WATARU (JP)
International Classes:
F21V9/14; A01G7/00; F21S2/00; G02B5/30
Domestic Patent References:
WO2010004489A12010-01-14
WO2000026705A12000-05-11
WO2000065384A12000-11-02
Foreign References:
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Other References:
Y GOTO ET AL., MOL. CRYST. LIQ. CRYST., vol. 260, 1995, pages 23 - 28
"Liquid Crystal Device Handbook", 1989, pages: 199
"Introduction to Experimental Liquid Crystal Chemistry", 2007, SIGMA PUBLISHING CO., LTD., pages: 46
"Liquid Crystal Handbook", MARUZEN PUBLISHING CO., LTD., pages: 196
Attorney, Agent or Firm:
ODAHARA Shuichi et al. (JP)
Shuichi Odawara (JP)
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