Tubular Light-Collimation Layout for Accurate Fluid Concentration Sensing
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Solution Overview
Problem
Conventional concentration measurement devices suffer from reduced measurement accuracy due to diffused light emission, leading to insufficient light detection and inaccurate concentration measurements.
Innovation Solution
A concentration measurement device is designed with a light source, a first optical system to condense light, a light-transmissive tubular body to collimate light, and a detection unit to detect light, enhancing light detection and measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If light is emitted directly into the resin tube without optical condensation, then the device structure remains simple, but the light detection amount is insufficient and measurement accuracy is lowered
Solution Approach 1:
The first optical system performs preliminary condensation of light before the light enters the measurement region. By pre-condensing the light at a focal position upstream of the tube, the system ensures that light is properly concentrated before interaction with the fluid, thereby improving detection accuracy without requiring complex downstream optical components
Solution Approach 2:
The patent introduces an intermediary optical system consisting of condensing lenses and mirrors between the light source and the measurement region. This intermediary system mediates the light path, condensing and directing light through the tube while allowing the detector to remain in a fixed position, thus resolving the contradiction between measurement precision and device simplicity
2Illumination intensity
If the tubular body is positioned at the focal position of the optical system, then light condensation is maximized, but light becomes overly concentrated and may cause saturation or damage
Solution Approach 1:
The patent applies local quality by positioning the tubular body at a specific location downstream from the focal point of the first optical system. This creates a localized region where light is sufficiently condensed for measurement while avoiding excessive concentration that would cause saturation or damage to the detection system
Solution Approach 2:
The patent changes the spatial parameter of the tubular body position relative to the optical focal point. By positioning the tube at a distance greater than the focal length from the condensing lens, the system transforms the light distribution from a highly concentrated focal point to a more distributed pattern suitable for reliable detection
3Measurement precision
If the tubular body is positioned on the front stage side of the focal position, then light condensation is achieved, but scattered light from particles interferes with detection accuracy
Solution Approach 1:
The patent extracts the scattered light interference problem by positioning the tubular body downstream from the focal point, where the light path geometry naturally separates transmitted light from scattered light. This spatial extraction allows the detection system to receive primarily transmitted light while minimizing scattered light interference
Solution Approach 2:
The patent utilizes dimensional positioning by placing the tube at a specific axial distance from the condensing lens, creating a three-dimensional light path configuration. This dimensional arrangement allows transmitted light to reach the detector while scattered light diverges at different angles and is excluded from the detection path
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 device secures sufficient light detection, improving measurement accuracy by collimating light through a tubular body and reducing interference from scattered light and biological particles, thereby enabling precise concentration calculations.
Implementation Method 1
a first optical system that is provided on an optical path of the light emitted from the light source and condenses the light emitted from the light source
Implementation Method 2
a light-transmissive tubular body that is disposed at a position on a rear stage side with respect to a focal position of the first optical system on the optical path and collimates the light incident on a side surface
Implementation Method 3
a detection unit that detects light through the tubular body
Data Source
AI summary
Provided is a concentration measurement device that includes a light source that emits light, a first optical system that is provided on an optical path of the light emitted from the light source and condenses the light emitted from the light source, a light-transmissive tubular body that is disposed at a position on a rear stage side with respect to a focal position of the first optical system on the optical path and collimates the light incident on a side surface in a state where a fluid flows inside, and a detection unit that detects light through the tubular body.