Optical Measuring Device Integrator Light Guide Uniformity
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Solution Overview
Problem
The existing optical measuring devices face issues with the deterioration of measurement light diffusion and reflection characteristics due to multiple exit openings, leading to variations in intensity distribution across photodetectors, which compromises the accuracy of light detection.
Innovation Solution
The optical measuring device incorporates a light guide unit with multiple light guide members that converge measurement light from a common exit opening, ensuring uniform intensity distribution and reducing the number of exit openings, while a baffle prevents direct reflection from the sample, maintaining optimal diffusion and reflection characteristics within the integrator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple exit openings are formed in the integrator to correspond to multiple photodetectors, then the optical measuring device can perform measurement in a wide wavelength region, but the multiple diffusion and reflection characteristics of measurement light in the integrator deteriorate
Solution Approach 1:
The patent divides the light collection function into multiple light guide members, each with a specific viewing angle range. This segmentation allows the integrator to maintain its multiple diffusion and reflection characteristics while still enabling detection across a wide wavelength range through different photodetectors with different spectral sensitivities.
Solution Approach 2:
Different light guide members are assigned different viewing angle characteristics to detect light from different regions within the integrator. This local differentiation in detection characteristics allows the system to maintain uniform intensity distribution while preserving the integrator's overall diffusion and reflection properties.
2Productivity
If multiple exit openings are formed in the integrator, then multiple photodetectors can detect measurement light simultaneously, but the area of the openings of the integrator is increased
Solution Approach 1:
The patent merges multiple light collection paths into a single exit opening by using multiple light guide members that all interface with the integrator through one opening. This combining approach maintains the productivity benefit of simultaneous detection while avoiding the area increase that would result from multiple separate exit openings.
3Adaptability or versatility
If multiple exit openings are formed at different positions, then multiple photodetectors can detect different wavelength regions, but a variation occurs in the intensity distribution of measurement light
Solution Approach 1:
Each light guide member is designed with specific viewing angle characteristics that correspond to different regions within the integrator. This local optimization ensures that each photodetector receives light with uniform intensity distribution from its designated region, while the combination of all light guide members provides comprehensive spectral coverage.
Solution Approach 2:
The patent varies the viewing angle parameters of different light guide members to optimize light collection from different regions of the integrator. By carefully controlling these angular parameters, the system achieves uniform intensity distribution across all detectors while maintaining wide spectral detection capability.
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 accurate detection of measurement light with uniform intensity distribution and enhanced diffusion and reflection characteristics, improving the overall precision of light measurement.
Implementation Method 1
a light guide unit (30) for guiding the measurement light that exits from the exit opening (23)
Implementation Method 2
the multiple diffusion and reflection characteristics of the integrator can be ensured
Implementation Method 3
the multiple diffusion and reflection characteristics of the integrator can be ensured
Implementation Method 4
photodetectors that detect measurement light exiting from an exit opening of the integrator
Data Source
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AI summary
An optical measuring device 1 irradiates a sample with excitation light and detects measurement light. The optical measuring device 1 includes an integrator 20 formed with an incident opening 22 on which the excitation light is to be incident and an exit opening 23 from which the measurement light is to exit, in which the sample is to be disposed in the integrator, a light guide unit 30 that guides the measurement light exiting from the exit opening 23, and a light detecting unit 40 that detects the measurement light guided by the light guide unit 30. The light guide unit 30 includes a plurality of light guide members 32 arranged so that incident end surfaces 32a of the light guide members 32 face the inside of the integrator 20 through the exit opening 23. The light detecting unit 40 detects the measurement light that is guided by at least one of the plurality of light guide members 32. Light-receiving regions of the plurality of light guide members 32 on the incident end surfaces 32a side overlap with each other in the integrator 20.