公开(公告)号：US09848540B2

公开(公告)日：2017-12-26

申请号：US14058992

申请日：2013-10-21

Applicant: FUJIFILM Corporation

Inventor： Yoshihisa Usami ,  Mitsuyoshi Ichihashi ,  Yohsuke Takeuchi

IPC: A01G7/04 ,  F21V9/14

CPC classification number: A01G7/045 ,  F21V9/14 ,  Y02P60/146

Abstract: The present invention provides a circular polarization illumination device which can irradiate right-circularly polarized light at a large light amount from a light source of right-circularly polarized light with a high efficiency and can irradiate left-circularly polarized light at a large light amount from a light source of left-circularly polarized light with a high efficiency, and a plant growth regulation method that can efficiently regulate the promotion or inhibition of the growth of plants by using the circular polarization illumination device. Moreover, the illumination device includes a light-emitting light source, a reflective polarizing plate, reirradiation unit, and circular polarization conversion unit.