Scintillator Array Grooves and Reflective Sheets for Light Output

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Solution Overview

Problem

Current radiation detection apparatuses face challenges in enhancing light output and signal-to-noise ratio, particularly in scintillator arrays used for imaging and security applications, due to limitations in scintillator material configuration and fabrication processes.

Innovation Solution

Incorporating substantially white reflective sheets with a gloss value of at least 50 and clear adhesive between scintillator elements, along with grooves on the side surfaces of scintillator elements, to improve light propagation and coupling with photosensors, thereby enhancing the signal-to-noise ratio.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If conventional scintillator arrays are used without reflective sheets or grooves, then the device complexity is low, but the light output is insufficient and signal-to-noise ratio is poor

Engineering Contradiction:

Improvelight outputVSAvoiddevice complexity

Core Design Contradiction:

Illumination intensityVSDevice complexity

Solution Approach 1:

A substantially white reflective sheet is introduced as an intermediary component between adjacent scintillator elements. This reflective sheet mediates the interaction between elements by reflecting stray light back into the scintillator material, thereby enhancing light output without requiring fundamental changes to the scintillator elements themselves.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The scintillator element is segmented by forming grooves along its side surfaces. These grooves divide the side surface into distinct regions that can be selectively treated with reflective material or adhesive, allowing optimized light management across different surface zones while maintaining the overall structural integrity of the element.

Inventive Principle:

Principle #1Segmentation

2Measurement precision

If reflective sheets and adhesive are added between scintillator elements, then the signal-to-noise ratio improves, but the manufacturing process becomes more complex

Engineering Contradiction:

Improvesignal-to-noise ratioVSAvoidease of manufacture

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

Reflective sheets are pre-positioned between scintillator elements during the assembly process, and grooves are formed on side surfaces before final assembly. This preliminary arrangement of light-management components ensures optimal optical coupling and signal-to-noise ratio while establishing a systematic manufacturing workflow that, although more complex than conventional methods, follows a logical sequence of operations.

Inventive Principle:

Principle #10Preliminary action

3Illumination intensity

If grooves are formed on scintillator elements, then light propagation is improved, but the manufacturing precision requirements increase

Engineering Contradiction:

Improvelight propagationVSAvoidmanufacturing precision

Core Design Contradiction:

Illumination intensityVSManufacturing precision

Solution Approach 1:

Grooves are formed locally on specific portions of the scintillator element's side surfaces, particularly in regions where light management is most critical. This localized approach to surface modification optimizes light propagation toward the photosensor while concentrating manufacturing precision requirements on specific areas rather than requiring uniform precision across the entire element surface.

Inventive Principle:

Principle #3Local quality

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 increases scintillating light output by 30% to 50% compared to conventional arrays, leading to improved signal quality without increasing background noise, and allows for more uniform light output across scintillator elements.

Implementation Method 1

Incorporating substantially white reflective sheets with a gloss value of at least 50... to improve light propagation and coupling with photosensors

Methodology Applied

Scientific EffectReflection: Reflection

Implementation Method 2

scintillator arrays that can be used for imaging applications... scintillator elements having side surfaces with grooves... adapted to provide scintillating light to a photosensor

Methodology Applied

Scientific EffectScintillation: Scintillation

Implementation Method 3

clear adhesive between scintillator elements, along with grooves on the side surfaces of scintillator elements, to improve light propagation and coupling with photosensors

Methodology Applied

Scientific EffectOptical coupling:

Data Source

PatentUS9400334B2Scintillator array, a scintillator, a radiation detection apparatus including the scintillator array or scintillator, and processes of forming the same

Publication Date: 2016.07.26 LUXIUM SOLUTIONS LLC

AI summary

A scintillator can include a photosensor surface and a side surface adjacent to the photosensor surface. The photosensor surface can be adapted to provide scintillating light to a photosensor. In an embodiment, the scintillator can have grooves along the side surface, wherein the grooves have lengths extending in a direction toward the photosensor surface. In another embodiment, the scintillator can include a reflector and a clear adhesive between the scintillator and reflector. In a particular embodiment, the reflector is substantially white and has a gloss value of at least 50. The scintillator can be in the form of a scintillator element of an array or in the form of a single scintillator. The scintillator can be coupled to a photosensor within a radiation detection apparatus. For an array, a process of forming the array can include forming grooves along one or more side surfaces during a fabrication process.