US 11,940,638 B2
Plant growth lighting fixture
Satoshi Kuniyasu, Minamiashigara (JP); and Ryosuke Shimizu, Minamiashigara (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on Apr. 5, 2021, as Appl. No. 17/221,953.
Application 17/221,953 is a continuation of application No. PCT/JP2019/044471, filed on Nov. 13, 2019.
Claims priority of application No. 2018-234272 (JP), filed on Dec. 14, 2018.
Prior Publication US 2021/0219498 A1, Jul. 22, 2021
Int. Cl. G02B 5/30 (2006.01); A01G 7/04 (2006.01); A01G 9/24 (2006.01); F21V 9/14 (2006.01); F21V 17/00 (2006.01)
CPC G02B 5/30 (2013.01) [A01G 7/045 (2013.01); A01G 9/249 (2019.05); F21V 9/14 (2013.01); F21V 17/002 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A plant growth lighting fixture comprising:
a lighting fixture main body having a light exit surface;
a light source held on the lighting fixture main body; and
a reflective-type circularly polarizing film that selectively reflects circularly polarized light having a particular rotational direction in a particular wavelength range,
wherein the reflective-type circularly polarizing film is releasably affixed to the light exit surface of the lighting fixture main body,
wherein the reflective-type circularly polarizing film has a circularly polarized light reflecting layer that selectively reflects circularly polarized light having a particular rotational direction in a particular wavelength range, an adhesive layer for releasable affixation to the light exit surface of the lighting fixture main body, and a support, and
wherein the circularly polarized light reflecting layer is disposed on one surface of the support, and the adhesive layer is disposed on a surface of the circularly polarized light reflecting layer.