Optical Module With Dichroic Mirror For Noise-Reduced Spectral Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing optical modules face challenges in achieving high-accuracy spectral analysis with complex configurations, and there is a need for a simpler layout that can effectively prevent noise interference in spectral analysis.
Innovation Solution
The optical module includes a mirror unit with a movable and fixed mirror, a beam splitter unit, and optical devices arranged to form an interference optical system, with a dichroic mirror and filters to separate measurement light and laser light paths, allowing for accurate spectral analysis while minimizing noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a complex optical configuration is used to achieve high-accuracy spectral analysis, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent combines the measurement light path and laser light path into a single optical system sharing common components such as the beam splitter unit, movable mirror, and fixed mirror. This merging allows the system to achieve high-accuracy spectral analysis while reducing overall device complexity by eliminating redundant optical elements.
Solution Approach 2:
The patent introduces a first filter as an intermediary component between the beam splitter unit and the first light detector. This filter selectively transmits measurement light while blocking laser light, preventing noise interference at the detector without requiring complex optical routing or additional separation mechanisms.
2Productivity
If laser light is allowed to reach the light detector, then the interference optical system can function, but noise interference increases
Solution Approach 1:
The first filter serves as a selective intermediary that allows measurement light to pass through to the light detector while blocking laser light. This prevents noise interference from laser light reaching the detector while maintaining the functionality of the interference optical system through the beam splitter unit.
Solution Approach 2:
The first filter is positioned specifically at the location where measurement light needs to reach the detector, providing localized spectral selection. This targeted approach prevents noise interference only where necessary, allowing the rest of the optical system to operate fully.
3Measurement precision
If the optical path length is increased to improve light detection sensitivity, then measurement precision is improved, but device complexity and size increase
Solution Approach 1:
By merging the measurement and laser light paths into a single optical system with shared components, the patent achieves sufficient light detection sensitivity without requiring excessively long optical paths. The beam splitter unit and common mirrors enable efficient light routing that maintains sensitivity while minimizing system complexity.
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 high-accuracy spectral analysis with a simplified layout by preventing laser light interference at the light detector, reducing noise and improving the design flexibility of the optical components.
Implementation Method 1
a beam splitter unit that is disposed on one side of the mirror unit in the first direction, and constitutes an interference optical system in combination with the movable mirror and the fixed mirror
Implementation Method 2
a first mirror that is disposed to face the beam splitter unit and the first optical device as a dichroic mirror that has a function of allowing the measurement light to be transmitted therethrough and reflecting the laser light
Implementation Method 3
a first filter that has a function of allowing the measurement light to be transmitted therethrough and cutting off the laser light
Implementation Method 4
a first optical device that is a first light detector that detects interference light of the measurement light which is emitted from the beam splitter unit
Data Source
AI summary
An optical module includes: a mirror unit that includes a movable mirror and a fixed mirror, a beam splitter unit that constitutes an interference optical system in combination with the movable mirror and the fixed mirror; a light incident unit that causes measurement light to be incident to the beam splitter unit; a first light detector that detects interference light of the measurement light; a second light source that emits laser light; a second light detector that detects interference light of the laser light; a first mirror that has a function of allowing the measurement light to be transmitted therethrough and reflecting the laser light; a second mirror that has a function of reflecting a part of the laser light and allowing the remainder of the laser light to be transmitted therethrough; a third mirror that has a function of reflecting the laser light; and a first filter that has a function of allowing the measurement light to be transmitted therethrough and cutting off the laser light, and is disposed between the first mirror and the first light detector.