OSL Sensor Reflective Backing for Light Collection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing OSL sensors face challenges in efficiently absorbing stimulation light and collecting luminescent light, which affects their performance in accurately determining radiation doses, particularly in discriminating between different types of radiation like neutrons and photons.
Innovation Solution
The design incorporates a dosimeter sled with OSL sensors featuring a cylindrical cup-shaped recess and a reflective backing that enhances light absorption and emission efficiency, including a converter material like HDPE for neutron detection and a reference filter for photon detection, allowing for improved radiation dose measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a reflective backing is added to enhance light collection, then luminescent light collection efficiency is improved, but device complexity increases
Solution Approach 1:
A reflective backing is introduced as an intermediary element between the OSLM and the base of the recess. This reflective backing acts as a mediator to redirect luminescent light that would otherwise be lost, directing it toward the OSL reader, thereby improving light collection efficiency without fundamentally changing the sensor's core structure.
Solution Approach 2:
The reflective backing utilizes the vertical dimension within the recess to improve light collection. By placing the reflective surface at the base of the cylindrical recess, it creates an additional optical path in the vertical dimension, allowing luminescent light to be reflected upward toward the reader, effectively adding a dimensional aspect to light collection without expanding the horizontal footprint.
2Use of energy by moving object
If the recess is designed as a cylindrical cup-shaped structure with reflective backing, then light absorption efficiency is improved, but manufacturing precision requirements increase
Solution Approach 1:
The recess is designed with specific geometric parameters - a cylindrical cup shape with defined depth and diameter ratios. By optimizing these parameters, the structure achieves effective light trapping and reflection. The reflective backing further enhances this by providing a controlled reflective surface, allowing the system to achieve high light absorption efficiency through parameter optimization rather than requiring extremely tight manufacturing tolerances on all dimensions.
Solution Approach 2:
The sensor assembly combines multiple materials with complementary properties: the OSLM material for luminescence, the reflective backing material for light reflection, and the recess structure material for mechanical support and light guidance. This composite approach allows each component to be optimized independently, reducing the overall manufacturing precision requirements while maintaining high light absorption efficiency.
3Measurement precision
If converter material and reference filter are added for radiation discrimination, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The sensor is segmented into functionally distinct components: the OSLM for general radiation detection, the converter material specifically for neutron detection, and the reference filter for photon detection. Each segment is optimized for its specific function and can be independently configured or replaced, allowing for precise radiation discrimination while maintaining modularity that manages complexity.
Solution Approach 2:
The OSLM serves multiple functions: it detects both neutron and photon radiation directly, and also works in conjunction with the converter material and reference filter for enhanced discrimination. This multi-functionality reduces the need for entirely separate detection systems, managing complexity while achieving high measurement precision through a unified sensor platform.
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 enhances the accuracy and efficiency of radiation dose determination by optimizing light interaction with OSL sensors, enabling better discrimination between neutron and photon radiation doses.
Implementation Method 1
a reflective backing positioned in the recess, wherein the recess is a cylindrical cup-shaped recess having a base, and wherein the reflective backing is positioned between the OSLM and the base of the recess
Implementation Method 2
an optically stimulated luminescent material (OSLM) mounted in a recess of the dosimeter sled
Data Source
AI summary
An optically stimulated luminescence (OSL) sensor is provided that has a reflective backing for improving the efficiency of exposing an optically stimulated luminescence material (OSLM) of the OSL sensor to stimulation light and for increasing the efficiency of detecting luminescent light emitted by the OSLM.