Light Scattering Measuring Apparatus Vertical Sample Holder Alignment
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Solution Overview
Problem
Existing light scattering measuring apparatuses face challenges in performing forward, side, and back measurements with a single light receiver while maintaining measurement accuracy, as stray light interference occurs during back measurements, requiring the cell to be inclined, which disrupts forward and side measurement optical paths.
Innovation Solution
A light scattering measuring apparatus with a single light receiver and a moving mechanism that adjusts the sample holder's position vertically to accommodate different optical paths for forward, side, and back measurements, using separate openings for each measurement type, and an optical element with a specific angle to prevent stray light from entering the receiver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single light receiver is used for forward, side, and back measurements, then device complexity and cost are reduced, but measurement precision deteriorates due to stray light interference during back measurements
Solution Approach 1:
The sample holder is made movable in the vertical direction, allowing it to be positioned at different heights corresponding to different optical paths. This dynamic positioning enables the single light receiver to selectively receive scattered light from different measurement angles (forward, side, or back) while blocking stray light from other paths, thus maintaining measurement precision while using a single receiver
Solution Approach 2:
A moving mechanism acts as an intermediary between the fixed light receiver and the movable sample holder, enabling precise vertical positioning of the sample holder to align with different optical paths. This intermediary mechanism allows the single light receiver to access multiple measurement configurations without direct movement, resolving the conflict between simplicity and precision
2Measurement precision
If the cell is inclined to prevent stray light from entering the light receiver during back measurement, then measurement precision is improved, but the optical path for forward and side measurements is disrupted
Solution Approach 1:
Instead of statically inclining the cell, the sample holder is designed to move vertically to different positions. At each position, the optical path is naturally aligned so that stray light does not enter the light receiver. This dynamic approach allows the system to adapt to different measurement modes (forward, side, back) without compromising optical path integrity for any mode
Solution Approach 2:
The measurement process is segmented into distinct vertical positions, with each position optimized for specific measurement angles. The optical path is also segmented into separate incident and exit portions, allowing independent optimization for each measurement type while using a single light receiver
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 accurate performance of forward, side, and back measurements without disrupting the optical paths, reducing measurement errors and costs by using a single light receiver and maintaining measurement accuracy across all angles.
Implementation Method 1
light scattering measuring apparatus for detecting light scattered from a sample including the particles
Implementation Method 2
an optical element having a first surface that forms a certain angle with a side surface of the cavity
Data Source
AI summary
Provided are a light scattering measuring apparatus. The light scattering measuring apparatus includes: light sources; a single light receiver; a sample holder including a cell, a frame body, a first opening formed in an incident portion of a first optical path used for forward measurement or side measurement, and a second opening formed in an incident portion of a second optical path used for back measurement, and an optical element; and a moving mechanism. The first optical path and the second optical path are separated from each other in vertical direction. The moving mechanism moves the first opening to a position of the incident portion of the first optical path when the forward or side measurement is to be performed, and to move the second opening to a position of the incident portion of the second optical path when the back measurement is to be performed.