Adjustable Optical Cell for Spectroscopy Resonance Tuning
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Solution Overview
Problem
Existing spectroscopy systems face challenges in maintaining accurate alignment and resonance of optical cavities under conditions of acceleration or vibration, particularly when using narrow bandwidth lasers, which affects the precision of chemical composition analysis.
Innovation Solution
An adjustable optical cell assembly with a hollow body and external actuators that elastically deform the cell to alter the distance and orientation of optical elements, allowing for resonance tuning without modulating the laser wavelength, ensuring precise alignment and stability even in vibrating environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the optical cavity is made rigid to maintain alignment stability, then the stability of the object's composition is improved, but the ability to adjust resonance frequency deteriorates
Solution Approach 1:
The patent applies the dynamics principle by introducing piezoelectric actuators that enable dynamic adjustment of the optical cavity length through elastic deformation of the rigid body. This allows the system to transition from a static rigid structure to a dynamically adjustable one, resolving the contradiction between rigidity for stability and adjustability for resonance tuning.
Solution Approach 2:
The patent changes the physical parameter of the cavity length by applying mechanical stress through piezoelectric actuators to the rigid body. This parameter change enables resonance frequency adjustment while maintaining the rigid structure's alignment stability, thus resolving the contradiction between stability and adaptability.
2Adaptability or versatility
If the laser wavelength is modulated to achieve resonance, then the adaptability is improved, but the measurement precision deteriorates
Solution Approach 1:
Instead of modulating the laser wavelength to achieve resonance, the patent inverts the approach by modulating the optical cavity length while keeping the laser wavelength fixed. This inversion maintains measurement precision by eliminating laser frequency modulation uncertainty while achieving the desired resonance adaptability.
3Ease of operation
If the optical elements are made movable to adjust alignment, then the ease of operation is improved, but the reliability deteriorates
Solution Approach 1:
The patent implements dynamic adjustability through piezoelectric actuators that can precisely control the position of optical elements. The system allows alignment adjustment when needed while maintaining stable rigid alignment during measurement, resolving the contradiction between ease of operation and reliability.
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 solution enhances the frequency precision of measurements, increases sensitivity, and minimizes uncertainty in absorption cross-section calculations, improving the accuracy of analyte concentration detection by maintaining rigid alignment and achieving resonance through cavity length adjustment.
Implementation Method 1
A first actuator is configured to apply a force to an external surface of the hollow body sufficient to elastically deform at least a portion of the hollow body such one of a distance and a relative orientation between first and second optical elements of the plurality of optical elements is responsively altered
Implementation Method 2
An optical cavity, comprising a rigid body and first and second optical elements affixed to the rigid body, is excited with a laser producing light of a substantially fixed wavelength. The rigid body is elastically deformed in at least a first location to bring the laser and the cavity into resonance
Implementation Method 3
An optical cavity, comprising a rigid body and first and second optical elements affixed to the rigid body, is excited with a laser producing light of a substantially fixed wavelength
Implementation Method 4
Optical absorption is a method by which a composition of a sample can be determined, including both its chemical components and their respective concentrations
Data Source
AI summary
An adjustable optical cell assembly includes a hollow body defining a cavity and a plurality of optical elements rigidly affixed within the cavity. A first actuator is configured to apply a force to an external surface of the hollow body sufficient to elastically deform at least a portion of the hollow body such one of a distance and a relative orientation between first and second optical elements of the plurality of optical elements is responsively altered.