Light reflector, lighting device, and lighting device for cultivating plant

Abstract

Provided is a light reflector which reflects light from a light source, such as sunlight or artificial light emitted from a fluorescent lamp and which can emit reflected light having a wavelength distribution different from a wavelength distribution of the light emitted from the light source. A light reflector is characterized by the emission of reflected light having a wavelength distribution different from a wavelength distribution of the light emitted from the light source and can provide a hue which was unable to obtain from a conventional white or silver reflection plate by emphasizing the light having a wavelength distribution different from the wavelength distribution of the light emitted from the light source, can fulfill the dramatic impact effect by illumination, and can be advantageously used in applications in which, for example, the hue of the illumination light, etc., used for commodities arranged in a showcase is considered important.

Description

technical field [0001] The present invention relates to a light reflector capable of emitting light having a wavelength distribution different from that of light emitted from a light source as reflected light, an illumination device and a plant cultivation illumination device using the light reflector. Background technique [0002] At present, in the fields of displays such as televisions and monitors, ceiling lamps, downlights, anti-crime lights, emergency lights, insect traps and other lighting fields, and lighting panels such as advertising lights, etc., in order to effectively utilize fluorescent lamps, cold cathode tubes, etc. Use a highly reflective light reflector behind the light source to avoid the light from the light source. The reflector is silver or white and reflects in the visible light region without changing the spectrum of the light emitted by the light source. [0003] In addition, lighting using light of a partial wavelength, such as artificial lights us...

AI Technical Summary

Problems solved by technology

The growth of plants largely depends on the wavelength of the light irradiated on the plants. Therefore, when the light of fluorescent lamps does not contain much light in the wavelength range absorbed by plants, it is necessary to increase the radiation intensity of the light of the fluorescent lamps, resulting in power consumption. There is a problem that the amount of the plant is raised, and there is a problem that it is difficult to control the temperature of the cultivation environment of the plant due to the heat generated by the fluorescent lamp

[0010] In addition, Patent Documents 4 and 5 propose a plant cultivation device using red LEDs and blue LEDs. However, due to the poor light diffusion of LEDs, it is difficult to irradiate plants with light uniformly. LED is used, so there is still a problem of high cost

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