Sample Adapter Geometry for Nonplanar Far-Infrared Spectroscopy
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Solution Overview
Problem
Existing far-infrared spectroscopy devices struggle to accurately measure nonplanar samples due to refractive issues at sample interfaces, leading to inefficient light conversion and reduced measurement accuracy.
Innovation Solution
The device incorporates a sample adapter with a planar front surface that matches the sample's shape, ensuring proper condensation and transmission of far-infrared light, and includes an illumination and detection optical system to enhance light interaction and detection efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a nonplanar sample is measured directly without a sample adapter, then the measurement process is simpler, but the far-infrared light is refracted at the sample interface and cannot be appropriately introduced into the detection nonlinear optical crystal, reducing measurement accuracy
Solution Approach 1:
A sample adapter is introduced as an intermediary component between the illumination optical system and the nonplanar sample. The adapter includes a planar adapter surface that interfaces with the optical system and a sample-adapting surface that conforms to the sample's nonplanar shape, thereby mediating the optical interaction and preventing refraction issues while maintaining measurement accuracy
Solution Approach 2:
The measurement system is segmented into distinct functional components: the illumination optical system, the sample adapter with its dual surfaces, and the detection system. This segmentation allows the sample adapter to specifically address the interface problem between planar optics and nonplanar samples without redesigning the entire system
2Productivity
If the sample surface is nonplanar, then the sample can be measured in its natural state, but the far-infrared light condensation and transmission are affected, reducing light conversion efficiency
Solution Approach 1:
The sample adapter exhibits local quality by having different surface characteristics in different regions: the adapter surface facing the optical system is planar to ensure proper light condensation and transmission, while the sample-adapting surface is shaped to match the specific nonplanar geometry of the sample, thereby optimizing both light efficiency and sample adaptability
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 allows for high-accuracy measurement of nonplanar samples by effectively condensing and converting far-infrared light, improving measurement precision and robustness.
Implementation Method 1
an illumination optical system configured to condense far-infrared light on a sample
Implementation Method 2
a detector configured to detect far-infrared light transmitted from the sample
Implementation Method 3
a pulsed far-infrared line (is-TPG light) having a single wavelength is parametrically oscillated
Implementation Method 4
transmitted light is introduced into a detection nonlinear optical crystal to convert the light into near-infrared light again
Data Source
AI summary
Provided are a far-infrared spectroscopy device and sample adapter that make it possible to highly accurately measure a sample that is not flat. A far-infrared spectroscopy device according to this invention comprises an illumination optical system for concentrating far-infrared light onto a sample and a detector for detecting light that has passed through the sample. Sample adapters are placed on the optical path of the far-infrared light between the illumination optical system and the sample and on the optical path between the sample and a detection optical element. The front surfaces of the sample adapters are roughly flat, and the shapes of the sample-side surfaces of the sample adapters roughly match the shape of the sample. The surface of the sample that the far-infrared light is concentrated on and the surface that the far-infrared light passes through are curved.