Integrating Sphere Spectrometer Plate Mounting
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Solution Overview
Problem
Existing spectrometry devices face challenges in accurately measuring quantum efficiency due to absorption of measurement target light by the mounting surface and potential contamination or scratching of the reflection surface, leading to decreased reflectance and inaccurate measurements.
Innovation Solution
A spectrometry device and method utilizing an integrating sphere with a plate and holder system where the measurement target light is repeatedly reflected, using a guide hole and concave portion with reflective coatings to create a pseudo disposition of the sample inside the sphere, minimizing absorption and contact with potentially contaminable surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the mounting surface is exposed into the integrating sphere to measure quantum efficiency, then the measurement can be performed, but the mounting surface absorbs the measurement target light leading to measurement inaccuracy
Solution Approach 1:
A transparent substrate is introduced as an intermediary between the sample and the integrating sphere environment. The substrate allows light to pass through while providing a mounting surface for the sample, thereby eliminating direct contact between the sample/mounting structure and the sphere wall that would cause light absorption and measurement errors.
Solution Approach 2:
The mounting function is extracted from the integrating sphere wall itself and transferred to a separate transparent substrate. This removes the absorbing mounting surface from the light path within the sphere, allowing the sphere's inner wall to maintain its high reflectance properties while still enabling sample mounting and measurement.
2Reliability
If the sample directly contacts the reflection surface to be mounted, then the sample can be secured, but the reflection surface may be scratched or contaminated decreasing reflectance
Solution Approach 1:
The transparent substrate serves as a mediator between the sample and the integrating sphere environment. It provides a stable mounting surface for the sample while preventing direct contact with the sphere's reflective inner wall, thereby protecting the reflectance surface from scratches and contamination that would degrade measurement accuracy.
Solution Approach 2:
The mounting function is segmented from the integrating sphere structure and placed on a separate transparent substrate. This separation allows the sample to be securely mounted on the substrate without the mounting process or sample contact affecting the integrity of the sphere's reflective surface.
3Loss of energy
If the mounting surface is coated with reflective material to improve reflectance, then light reflection is enhanced, but the surface is still susceptible to scratching and contamination
Solution Approach 1:
The transparent substrate acts as an intermediary that carries the reflective coating away from the integrating sphere's inner wall. The coating is applied to the substrate rather than the sphere wall, maintaining high reflectance while protecting the coating from mechanical damage and contamination that would occur if it were on the sphere wall.
Solution Approach 2:
The reflective coating is extracted from the integrating sphere's inner wall and transferred to the transparent substrate. This allows the coating to provide enhanced light reflection while being isolated from the harsh measurement environment, preventing scratching and contamination that would reduce reflectance over time.
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
This configuration allows for high-accuracy measurement of quantum efficiency by reducing light absorption and preventing contamination, enabling precise characterization of light emission characteristics without altering the sample's arrangement for different measurement methods.
Implementation Method 1
the bottom surface and the side surface are coated with a reflective material reflecting the measurement target light
Implementation Method 2
an integrating sphere which includes an inner wall surface reflecting the measurement target light
Data Source
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AI summary
A spectrometry device is a spectrometry device for measuring measurement target light emitted from a sample, including: an integrating sphere which includes an inner wall surface and an attachment hole; an adapter which includes a guide hole guiding the measurement target light and is disposed in the integrating sphere; a plate which includes a first surface covering the guide hole from the outside of the integrating sphere and allowing the sample to be mounted thereon and a second surface and through which the measurement target light is transmitted; a holder which includes a concave portion mounting the plate thereon and is attached to the attachment hole; and a spectral detector which detects the measurement target light. The concave portion includes a bottom surface facing the second surface and a side surface surrounding the periphery of the plate. The bottom surface and the side surface are coated with a reflective material reflecting the measurement target light.