Adhesive Light Blocking Section for Spectrometric Enclosure
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Solution Overview
Problem
Existing spectrometric apparatuses face accuracy issues due to external light entering the measurement enclosure, which degrades measurement precision when the apparatus is pressed against a subject, causing gaps that allow external light to interfere with the measurement.
Innovation Solution
A spectrometric apparatus with an adhesive member on its enclosure, featuring a light blocking section outside the window area to prevent external light from entering, and a light transmissive section to maintain adhesion and reduce refractive index differences, ensuring accurate measurements by blocking external light effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the apparatus is pressed against the subject to close gaps, then external light entry is reduced, but measurement precision deteriorates due to gap formation when pressing force changes
Solution Approach 1:
The adhesive member is applied in advance to the enclosure surface surrounding the window, creating a preliminary seal that prevents external light from entering through gaps. This preliminary action ensures that even when the apparatus is pressed against the subject, the adhesive member maintains continuous contact and blocks external light without requiring constant pressing force.
Solution Approach 2:
The adhesive member acts as an intermediary between the enclosure and the subject, filling and sealing the gap between them. This intermediary substance ensures that external light is blocked while allowing the enclosure to maintain stable contact with the subject without direct mechanical pressure.
2Object-affected harmful factors
If a light blocking section is provided along the outer circumferential edge of the adhesive member, then external light blocking is improved, but the adhesive member peels off at the edge
Solution Approach 1:
The adhesive member is designed with different local qualities: the light blocking section has high light-blocking capability but lower adhesion, while the light transmissive section has reduced light-blocking capability but maintains strong adhesion. This local differentiation allows the light blocking function to be performed effectively while preventing peeling at the edges through the adhesive light transmissive section.
Solution Approach 2:
The adhesive member is constructed as a composite structure combining a light blocking section and a light transmissive section with different material properties. The light blocking section uses materials optimized for light absorption, while the light transmissive section uses materials with better adhesive characteristics, creating a composite that balances both light blocking and adhesion requirements.
3Use of energy by moving object
If the light transmissive section has a refractive index matching the light transmissive member, then light usage efficiency is improved, but manufacturing complexity increases
Solution Approach 1:
The light transmissive section is designed with a specific refractive index parameter that matches or is close to that of the light transmissive member (such as a sapphire window). This parameter optimization reduces reflection and improves light transmission efficiency. While this may require selective material selection, it does not fundamentally complicate the manufacturing process.
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 solution enhances measurement accuracy by preventing external light from entering the enclosure, maintaining adhesion, and improving light usage efficiency, while allowing for easy exchange and positioning of the adhesive member.
Implementation Method 1
the adhesive member has a light blocking section that is located in an area outside the window and surrounds the window in a plan view in a direction along an optical axis of the light traveling toward the measurement module and blocks light that belongs to a measurement wavelength region
Implementation Method 2
a light transmissive section that transmits at least the light that belongs to the measurement wavelength region
Data Source
AI summary
A biological body inspection apparatus includes a measurement module that acquires an amount of light having a wavelength under measurement contained in light incident on the measurement module and an enclosure that accommodates the measurement module and has a window that transmits light traveling toward the measurement module. An adhesive member is provided on a surface of the enclosure at least in an area thereof that surrounds the window. The adhesive member has a light blocking section that is located in an area outside the window and surrounds the window in a plan view in the direction along the optical axis of the light traveling toward the measurement module and blocks light that belongs to a measurement wavelength region within which at least the wavelength under measurement is present.