Multi-Refractive Index Beam Splitter for High Magnification Observation
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Solution Overview
Problem
Conventional beam splitters that reflect infrared light and transmit visible light have a short working distance at high magnification, making side optical observation impossible, which is a limitation in measuring micro hot spots effectively.
Innovation Solution
A beam splitter using a multiple refractive index layer is designed to reflect visible light and transmit infrared light, allowing for high magnification measurement by configuring the refractive index layers to alternately and repeatedly arrange first and second refractive index layers, ensuring effective reflection and transmission of light across different wavelengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional beam splitter that reflects infrared light and transmits visible light is used, then infrared light can be reflected for measurement, but the working distance becomes short at high magnification making side optical observation impossible
Solution Approach 1:
The patent inverts the conventional beam splitter configuration by making it transmit infrared light and reflect visible light instead of the traditional infrared reflection and visible transmission. This inversion resolves the working distance limitation while maintaining measurement capability for micro hot spots
Solution Approach 2:
The patent changes the optical parameters of the beam splitter by using a multiple refractive index layer structure that selectively transmits infrared wavelengths while reflecting visible wavelengths. This parameter change enables the desired working distance and observation capability
2Adaptability or versatility
If a beam splitter is designed to cover a wide spectrum for broadband applications, then more wavelengths can be measured, but the design becomes complex and difficult to implement
Solution Approach 1:
The patent uses a composite multiple refractive index layer structure where layers with different refractive indices are stacked together. This composite approach enables broadband spectral coverage while maintaining a relatively simple and manufacturable design through systematic layer arrangement
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 beam splitter enables high magnification measurement by maintaining effective reflection of visible light and transmission of infrared light, overcoming the limitations of conventional beam splitters and allowing for side optical observation, thus enhancing the measurement capabilities for micro hot spots.
Implementation Method 1
a multiple refractive index layer configured to reflect first light and transmit second light
Implementation Method 2
the multiple refractive index layer includes a first refractive index layer having a first refractive index and a second refractive index layer having a second refractive index less than the first refractive index
Data Source
AI summary
Provided are a beam splitter using a multiple refractive index layer, which enables high magnification measurement by transmitting infrared light and reflecting visible light, and a defective element detection device including the same. The beam splitter includes a multiple refractive index layer and a base layer. The multiple refractive index layer is configured to reflect first light and transmit second light having a wavelength longer than a wavelength of the first light. The base layer is provided on one side of the multiple refractive index layer and configured to transmit the second light transmitted through the multiple refractive index layer. The multiple refractive index layer includes a first refractive index layer having a first refractive index and a second refractive index layer having a second refractive index less than the first refractive index.