| 摘要 |
A light ray radiating device for effectively dispersing light ray energy emitted from an optical conductor cable into a direct-light ray component and into an indirect-light ray component in order to cultivate plants more effectively. The device comprises an upper plate having a hole through which the light-emitting end of an optical conductor cable is inserted at the approximate central portion of the upper plate, a lower plate composed of a light diffusing and reflecting liquid-crystal plate is disposed so as to be opposed to the light-emitting end of the optical conductor cable, a frame body for unitarily mounting thereon the upper plate and the lower plate, and an intermediate plate having a light ray passing portion at the central part thereof and mounted on the frame body between the upper plate and the lower plate. The light ray energy passing through the lower plate composed of the liquid-crystal plate is controlled by changing the voltage applied thereto. |
