UV Inspection Layer Stack for 222 Nm and 254 Nm Discrimination
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Solution Overview
Problem
Existing ultraviolet irradiation measurement tools, such as UV labels and UV scales, fail to accurately distinguish between ultraviolet light of wavelengths 222 nm and 254 nm due to interference from sunlight, as they either absorb or fail to shield these wavelengths, making it difficult to determine if ultraviolet irradiation has occurred.
Innovation Solution
An inspection tool with a sensing layer and a transparent layer that shields ultraviolet light of 222 nm while transmitting sunlight, allowing for visual differentiation between sunlight exposure and ultraviolet irradiation through color changes in the sensing layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional UV inspection tools (UV label, UV scale) are used to measure ultraviolet irradiation, then the measurement can be performed, but sunlight interference causes color development that prevents accurate discrimination between sunlight-induced changes and actual ultraviolet irradiation effects
Solution Approach 1:
The inspection tool is divided into multiple functional layers: a sensing layer containing UV-sensitive materials and a transparent layer with specific transmittance characteristics. This segmentation allows the sensing layer to respond to UV irradiation while the transparent layer filters sunlight interference, enabling accurate measurement despite external light conditions.
Solution Approach 2:
The transparent layer acts as an intermediary between the sunlight environment and the sensing layer. It selectively transmits UV wavelengths while blocking harmful sunlight wavelengths, thereby mediating the interaction between the sensing materials and external light sources to prevent false color development.
2Measurement precision
If a filter layer is added to block sunlight wavelengths, then sunlight interference is reduced, but the device complexity increases
Solution Approach 1:
The transparent layer serves multiple functions simultaneously: it acts as a protective cover for the sensing layer, provides mechanical support, and functions as a wavelength-selective filter. This multi-functionality reduces the need for separate filter components, thereby limiting the increase in device complexity while maintaining measurement precision.
3Measurement precision
If the transparent layer blocks sunlight wavelengths, then discrimination between UV and sunlight is improved, but transmittance of useful UV wavelengths must be maintained
Solution Approach 1:
The transparent layer is designed with specific transmittance parameters that allow high transmission of UV wavelengths (200-380 nm, particularly 222 nm and 254 nm) while blocking sunlight wavelengths. By carefully selecting and controlling the transmittance parameters of the transparent layer material, the system achieves both sunlight rejection and UV signal preservation without significant energy loss.
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
Enables easy discrimination of ultraviolet irradiation at 222 nm and 254 nm even in the presence of sunlight by using a transparent layer that shields the target wavelengths, ensuring accurate detection despite environmental interference.
Implementation Method 1
the sensing layer senses at least light having a wavelength of 200 to 254 nm
Implementation Method 2
the transparent layer contains an ultraviolet-C absorber
Data Source
AI summary
The present invention provides an inspection tool and an inspection method, with which it is possible to easily discriminate whether or not irradiation with light having a wavelength of 222 nm and light having a wavelength of 254 nm is performed even under sunlight. The inspection tool of the present invention includes a sensing portion and a reference portion, in which the sensing portion includes a sensing layer which senses at least light having a wavelength of 200 to 254 nm, the reference portion includes the sensing layer and a transparent layer, and the transparent layer satisfies a relationship of Expressions (1) and (2),0%≤TMA200 to 254<15.0% Expression (1)50.0%<TMI360 to 800≤100% Expression (2)in Expression (1), TMA200 to 254 represents a maximum transmittance of the transparent layer in a wavelength range of 200 to 254 nm.in Expression (2), TMI360 to 800 represents a minimum transmittance of the transparent layer in a wavelength range of 360 to 800 nm.