Light irradiation device

Abstract

To achieve functional diversification of a light irradiation device.SOLUTION: A light irradiation device includes a head part having a light emission surface contactable with a human skin. The head part has an optical system that emits light through the light emission surface to the outside. The optical system includes one or more light sources, and one or more filters. On the basis of light from one or more light sources. the optical system can emit two or more kinds of lights different in characteristics through one or more filters and through a common light emission surface.SELECTED DRAWING: Figure 1

Claims

[Claim 1] A head unit having a light-emitting surface that can come into contact with human skin, An optical system provided in the head portion that emits light to the outside through the light-emitting surface, The head unit is provided with a sensor that detects the condition of human skin, The system includes a control device that controls the optical system based on sensor information from the aforementioned sensor, The optical system includes two or more light sources and one or more filters, and is capable of emitting two or more types of light with different characteristics through the light emission surface via the one or more filters based on the light from the two or more light sources. The one or more filters mentioned above include a first filter and a second filter, The first filter transmits light in the first wavelength range, The second filter transmits light in a second wavelength range different from the first wavelength range. The sensor includes a sensor that detects color information, The control device is A detection processing unit that detects the condition of blemishes in the area of ​​skin that the head unit is in contact with, based on sensor information from the aforementioned sensor, The system includes an output control unit that controls the output of light in the first wavelength range based on the detection result of the detection processing unit, The output control unit is a light irradiation device that, when the stain is of a first intensity, increases the output of light in the first wavelength range and decreases the output of light in the second wavelength range compared to when the stain is of a second intensity that is lighter than the first intensity. [Claim 2] The optical system is capable of emitting two or more types of light having different characteristics through a common light emission surface, as described in claim 1. [Claim 3] The light irradiation device according to claim 1 or 2, wherein the one or more filters are formed by applying a coating to the light source. [Claim 4] The light irradiation device according to claim 1, wherein at least one sensor is provided on each side of the light emitting surface in the head portion. [Claim 5] The first filter transmits light in a wavelength range including a wavelength of 505 nm. The light irradiation apparatus according to claim 1, wherein the second filter transmits light in a wavelength range including a wavelength of 800 nm.

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