Ultraviolet light irradiation device, method of using ultraviolet light irradiation device, and ultraviolet light irradiation method
AssigneeUshio Denki Kabushiki Kaisha
InventorsKeisuke Naito, Hideaki Yagyu, Akihiro Kuno, Shigeki Fujisawa
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Abstract
Provided is an ultraviolet light irradiation device that is capable of causing effective inactivation of microorganisms as well as a method of using the ultraviolet light irradiation device. An ultraviolet light irradiation device includes a light source that radiates ultraviolet light with a wavelength in a range of 190 nm to 235 nm; a housing that houses the light source; an extracting portion that extracts the ultraviolet light that is radiated from the light source and causes it to be directed toward an exterior of the housing; and a diffusing member that diffuses the ultraviolet light.
Claims17
An ultraviolet light irradiation device, comprising:
- a light source that radiates ultraviolet light with a wavelength in a range of 190 nm to 235 nm;
- a housing that houses the light source;
- an extracting portion that extracts the ultraviolet light that is radiated from the light source and causes it to be directed toward an exterior of the housing;
- an optical filter that transmits ultraviolet light within a wavelength band of 190 nm to 235 nm but substantially does not transmit ultraviolet light within a wavelength band of 240 nm to 280 nm;
- and
- a diffusing member that diffuses the ultraviolet light, wherein the diffusing member is arranged toward where the ultraviolet light exits the optical filter at the extracting portion, wherein the diffusing member is arranged so as to come in contact with the optical filter.
An ultraviolet light irradiation device, comprising:
- a light source that radiates ultraviolet light with a wavelength in a range of 190 nm to 235 nm;
- a housing that houses the light source;
- an extracting portion that extracts the ultraviolet light that is radiated from the light source and causes it to be directed toward an exterior of the housing;
- an optical filter that transmits ultraviolet light within a wavelength band of 190 nm to 235 nm but substantially does not transmit ultraviolet light within a wavelength band of 240 nm to 280 nm;
- and
- a diffusing member that diffuses the ultraviolet light, wherein the diffusing member is arranged toward where the ultraviolet light exits the optical filter at the extracting portion, wherein the diffusing member is arranged so as to come in contact with the optical filter,
- wherein the housing has, at a location toward where the ultraviolet light exits the optical filter, an attachment portion for attachment of the diffusing member.
An ultraviolet light irradiation method, comprising:
- causing ultraviolet light to be radiated from a light source housed in a housing that radiates ultraviolet light with a wavelength in a range of 190 nm to 235 nm;
- extracting the ultraviolet light that is radiated from the light source and causing it to be directed toward an exterior of the housing;
- causing the ultraviolet light radiated from the light source to be selectively transmitted by an optical filter that transmits ultraviolet light within a wavelength band of 190 nm to 235 nm but substantially does not transmit ultraviolet light within a wavelength band of 240 nm to 280 nm;
- and
- causing light that exits the optical filter to be diffused by a diffusing member that is arranged toward an exit side of the optical filter, wherein the diffusing member diffuses the ultraviolet light, wherein the diffusing member is arranged so as to come in contact with the optical filter.
Dependencies are inferred from the claim text.