Ultraviolet light irradiation device
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a need for an ultraviolet light irradiation device that effectively inactivates pathogens while ensuring safety for humans and animals, as existing devices face challenges in balancing pathogen inactivation with the potential harm caused by ultraviolet light in the 240 nm to 280 nm wavelength range.
Innovation Solution
An ultraviolet light irradiation device is designed with a light source emitting ultraviolet light in the 200 nm to 240 nm wavelength range and an optical filter using a dielectric multilayer film, which includes a first transmission band for the safe wavelength range and a first restriction band to suppress harmful light in the 240 nm to 280 nm range, along with a second transmission band in the 300 nm to 400 nm range to manage light transmission effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ultraviolet light in the wavelength range of 240 nm to 280 nm is emitted to inactivate pathogens, then pathogen inactivation capability is improved, but harm to human body increases
Solution Approach 1:
The optical filter segments the ultraviolet spectrum into multiple transmission bands (first transmission band for 200-240 nm, second transmission band for 300-400 nm) and restriction bands (first restriction band for 240-300 nm), allowing selective transmission of beneficial wavelengths while blocking harmful ones
Solution Approach 2:
The optical filter acts as an intermediary component between the ultraviolet light source and the environment, mediating the spectrum to transmit safe wavelengths (200-240 nm) for pathogen inactivation while blocking harmful wavelengths (240-280 nm) that could harm human skin and eyes
2Object-affected harmful factors
If ultraviolet light in the wavelength range of 200 nm to 240 nm is emitted to improve safety, then harm to human body is reduced, but pathogen inactivation capability is limited
Solution Approach 1:
The optical filter provides multi-functionality by simultaneously transmitting the first transmission band (200-240 nm) for safe pathogen inactivation and the second transmission band (300-400 nm) for additional disinfection capability, while blocking the harmful first restriction band (240-300 nm)
Solution Approach 2:
The invention extends the effective wavelength range by adding the second transmission band (300-400 nm) beyond the traditional 200-240 nm range, providing additional pathogen inactivation capability in a safer wavelength region
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device enhances pathogen inactivation capability while minimizing harm to humans and animals by appropriately suppressing harmful ultraviolet light, allowing for increased irradiation doses in the safer wavelength range while restricting harmful light, thus ensuring safety and efficacy.
Implementation Method 1
an optical filter disposed to allow the ultraviolet light to enter and including a dielectric multilayer film, in which the optical filter has a transmission spectrum of zero-degree light including a first transmission band and a second transmission band that transmit the zero-degree light and a first restriction band that restricts transmission of the zero-degree light
Data Source
AI summary
An ultraviolet light irradiation device includes an optical filter. The optical filter has a transmission spectrum of zero-degree light including a first transmission band and a second transmission band that transmit the zero-degree light and a first restriction band that restricts transmission of the zero-degree light. The first transmission band is present within the wavelength band of 200 nm or more and less than 240 nm. The second transmission band is present within a wavelength band of more than 300 nm and less than 400 nm. The first restriction band is present over an entire wavelength range of at least 240 nm or more and 300 nm or less, and the first restriction band has an upper limit provided within a range of more than 300 nm and 380 nm or less.