Phase-Change Transfer Elements for Compact Spectrometer Switching
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Solution Overview
Problem
Spectrometer devices face challenges with expensive and complex switchable transfer elements that require moveable components and result in significant optical power loss, particularly when using liquid crystals for mode switching.
Innovation Solution
A spectrometer device utilizing a phase-change material with two different optical properties based on its phase, integrated in the beam paths of illumination and detection light, and controlled by a switching element to adjust these properties without requiring moveable parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If liquid crystals are used as switchable transfer elements for setting operation modes, then the spectrometer device can achieve mode switching capability, but significant optical power loss occurs and the device becomes complex and expensive
Solution Approach 1:
The patent uses phase-change material (PCM) that transitions between crystalline and amorphous phases to switch between different operation modes. The PCM exhibits different optical properties in each phase, enabling mode switching without the need for liquid crystals. This phase transition approach eliminates the 50% optical power loss associated with liquid crystal polarizers while maintaining versatile mode switching capability.
Solution Approach 2:
The invention replaces the liquid crystal optical switching mechanism with a phase-change material-based switching mechanism. Instead of using liquid crystal molecules that require polarization filters and complex alignment, the patent uses PCM that can be switched between phases through thermal or optical stimulation, directly modulating the optical path without significant power loss.
2Adaptability or versatility
If liquid crystals are used for mode switching, then operation mode adjustment is possible, but the device size increases and reliability decreases due to encapsulation requirements
Solution Approach 1:
The patent employs phase-change material that can be reliably switched between crystalline and amorphous phases through controlled thermal or optical stimulation. This phase transition mechanism is more reliable than liquid crystal switching because it does not require encapsulation to prevent leakage or degradation, and the solid-state PCM maintains stable optical properties over time without the reliability issues associated with liquid crystal encapsulation.
3Adaptability or versatility
If traditional switchable transfer elements are used, then mode switching is achievable, but the device becomes expensive and complex
Solution Approach 1:
The patent uses phase-change material as a simple, solid-state switching mechanism that replaces complex liquid crystal assemblies with multiple polarizers and alignment layers. The PCM layer can be directly integrated into the optical path on a substrate, eliminating the need for complex liquid crystal cell structures, encapsulation layers, and alignment mechanisms, thereby significantly reducing device complexity and cost.
Solution Approach 2:
The invention extracts and eliminates the unnecessary components from traditional liquid crystal switchable transfer elements, such as encapsulation layers, polarizing filters, and complex alignment structures. By using only the essential phase-change material layer that directly modulates light through phase transitions, the patent simplifies the optical component structure while maintaining the mode switching function.
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 solution provides a cost-effective, reliable, and compact spectrometer device with flexible operation, minimizing optical power loss and reducing the complexity of switchable transfer elements.
Implementation Method 1
the transfer element comprises a phase-change material having at least two different optical properties depending on the phase of the phase-change material
Data Source
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AI summary
The present invention relates to a spectrometer device (110) for obtaining at least one item of spectroscopic information on at least one object (112) by spectroscopic measurement, the spectrometer device (110) comprising: (1) at least one light emitting element (114), wherein the light emitting element (114) is configured for emitting illumination light (116) for illuminating the at least one object (112) in order to generate detection light (118) from the at least one object (112); (2) at least one detector (120), wherein the detector (120) is configured for generating at least one detector (120) signal when receiving the detection light (118) from the object (112) in order to acquire the item of spectroscopic information; (3) at least one transfer element (122), wherein the transfer element (122) comprises a phase-change material having at least two different optical properties depending on the phase of the phase-change material, wherein the transfer element (122) is disposed in at least one of: a beam path of the illumination light (116) and a beam path of the detection light (118); and (4) at least one switching element (124), wherein the switching element (124) is configured for setting the phase of the phase-change material in order to adjust the optical properties of the phase-change material.