Infrared Microscope Dual Aperture Crosstalk Reduction
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Solution Overview
Problem
Infrared microscopes face challenges in achieving accurate measurements in the long-wavelength region due to crosstalk, which affects the identification of substances, and also miss optical information at short-wavelengths due to spacing between light-receiving elements.
Innovation Solution
The use of an infrared microscope with a first aperture having multiple holes between the light source and the sample, and a second aperture corresponding to the first aperture between the sample and the detector, providing a confocal effect and allowing for the selection of apertures based on wavelength to minimize crosstalk and improve spatial resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If spaces between light-receiving elements are increased to eliminate crosstalk, then measurement accuracy in long-wavelength region is improved, but optical information in short-wavelength region is lost
Solution Approach 1:
The aperture is divided into multiple holes arranged in a specific pattern, allowing different wavelength regions to be directed to different light-receiving elements. This segmentation enables simultaneous capture of both long-wavelength and short-wavelength information while eliminating crosstalk through spatial separation.
Solution Approach 2:
The solution moves from a one-dimensional spacing problem to a two-dimensional aperture pattern design. By arranging multiple holes in specific two-dimensional patterns, the system can simultaneously address crosstalk elimination and information preservation that cannot be achieved with simple one-dimensional spacing.
2Device complexity
If a single aperture configuration is used for all wavelengths, then device complexity is reduced, but measurement accuracy varies across different wavelength regions
Solution Approach 1:
The system provides multiple aperture configurations that can be dynamically selected based on the wavelength region being measured. This allows optimization of measurement accuracy for different wavelength regions while maintaining a relatively simple overall device structure through configuration switching.
Solution Approach 2:
Different aperture configurations with varying hole patterns, sizes, and arrangements are provided to match different wavelength regions. By changing aperture parameters according to wavelength, the system achieves high measurement accuracy across the entire infrared spectrum.
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 enables accurate measurements with reduced crosstalk, particularly in the fingerprint region, and ensures that optical information is not missed, allowing for precise identification of substances across various wavelengths.
Implementation Method 1
the first aperture has a plurality of holes; the holes are disposed with intervals which correspond to an arrangement of light-receiving elements disposed in the detector, so that the detector can detect the infrared light as a detecting light; and the second aperture has holes having the same size and arrangement as the first aperture
Data Source
AI summary
The problem to be solved by the present invention is to provide an infrared microscope with good measuring accuracy and less crosstalk.The infrared microscope 10 comprises a light source 12, an irradiating unit 14 for irradiating the infrared light from the light source to a sample 16, a focusing unit 18 for focusing the infrared light transmitted through or reflected by the sample 16, and a detector 20 for detecting the focused infrared light. The irradiating unit 14 comprises a first aperture 24, and the first aperture is disposed at a position where the infrared light from the light source passes therethrough. The focusing unit 18 comprises a second aperture 30, and the second aperture is disposed at an imaging position of the infrared light at the first aperture 24. The first aperture has a plurality of holes, and the holes are disposed at intervals corresponding to the arrangement of the light-receiving elements provided in the detector 20 to detect the infrared light as a detecting light. The second aperture 30 has holes that have the same size and arrangement as the first aperture 24.