Scattered Light Testing Device with Segmented Scattering Body
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Solution Overview
Problem
Conventional scattered light measuring devices face interference from diffuse scattered radiation, which can lead to inaccurate calibration and measurement results, often requiring costly filters and precise positioning to avoid shadowing and dirt issues.
Innovation Solution
A testing device with a light-transmitting body featuring upstream and downstream areas devoid of scattering centers, ensuring that light entry and exit points lie outside the detection field of light sensors, thereby suppressing disruptive diffuse scattered radiation without the need for filters, and using anti-reflection coatings to prevent reflection errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a scattering body is used for calibration, then calibration capability is provided, but diffuse scattered radiation interferes with measurement accuracy
Solution Approach 1:
The scattering body is divided into three distinct regions: an upstream light-transmitting region, a middle scattering body section with scattering centers, and a downstream light-transmitting region. This segmentation allows the scattering centers to be confined to a specific zone while the entry and exit light paths remain clear, eliminating diffuse scattered radiation interference while maintaining calibration capability.
Solution Approach 2:
The scattering centers are extracted and concentrated only in the middle section of the scattering body, while the upstream and downstream regions are made free of scattering centers. This extraction ensures that light enters and exits the scattering body without being scattered at the boundaries, preventing interference with the light sensors.
2Measurement precision
If filters are used to block diffuse scattered radiation, then measurement accuracy improves, but device complexity and cost increase
Solution Approach 1:
Instead of using filters to block harmful diffuse scattered radiation, the invention redesigns the scattering body structure to prevent the generation of such radiation at the light entry and exit points. By making the upstream and downstream regions free of scattering centers, the harmful effect is eliminated at its source, converting a filtering problem into a structural solution.
3Measurement precision
If the scattering body is positioned precisely to avoid shadowing, then measurement accuracy improves, but ease of operation decreases
Solution Approach 1:
Different regions of the scattering body have different optical properties: the upstream and downstream regions are transparent to light (no scattering centers), while the middle section contains scattering centers for calibration. This local differentiation ensures that light paths are clear where needed while maintaining scattering capability where required, eliminating shadowing issues regardless of positioning.
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 design allows for more reliable and efficient calibration and measurement of scattered light measuring devices by eliminating the need for filters and ensuring accurate positioning, reducing costs and improving measurement precision.
Implementation Method 1
The light-transmissive body (20) has a scattering body section (24) with scattering centers (22), at which the light (14) emitted by a light source (12) can be scattered
Implementation Method 2
at least one of a light entry side and a light exit side of the light-transmissive body (20) are anti-reflection coated
Data Source
Figure 1
Figure 2a
Figure 2b~3a
AI summary
The invention relates to a testing device (10) for a scattered-light measuring device, said testing device comprising a light-transmissive body (20), which can be arranged in a measurement chamber (16) of the scattered-light measuring device and comprises a plurality of scattering centres (22), by means of which a light (14) emitted by a light source (12) of the scattered-light measuring device can be scattered, wherein the scattering centres (22) are present in a scattering body segment (24) of the light-transmissive body (20), which scattering body segment is arranged between an upstream region (26) of the light-transmissive body (20) and a downstream region (28) of the light-transmissive body (20), and wherein the upstream region (26) and the downstream region (28) are each free of the scattering centres (22). The invention further relates to a production method for a testing device for a scattered-light measuring device. The invention further relates to a method for checking a scattered-light measuring device.