公开(公告)号：US20210267139A1

公开(公告)日：2021-09-02

申请号：US17324196

申请日：2021-05-19

Applicant: FUJIFILM Corporation

Inventor： Satoshi KUNIYASU ,  Ryosuke SHIMIZU

IPC: A01G9/24 ,  A01G7/04 ,  F21V9/40 ,  F21V9/14 ,  G02B5/30

Abstract: A plant growth lighting fixture has two or more of a blue light source, a green light source, and a red light source and a reflective-type circularly polarizing plate having two or more of a blue-reflecting cholesteric liquid crystal layer having a center wavelength of an effective wavelength range in blue light, a green-reflecting cholesteric liquid crystal layer having a center wavelength of an effective wavelength range in green light, and a red-reflecting cholesteric liquid crystal layer having a center wavelength of an effective wavelength range in red light. The wavelength ranges of the emission center wavelengths as the light sources and the wavelength ranges of the center wavelength of the effective wavelength range as the reflective-type circularly polarizing plate are wavelength ranges of the same colors, and the reflective-type circularly polarizing plate has a polarization correction layer having a phase difference in a thickness direction.