Spectroscopic Module Segmented Support and Flexible Wiring
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Solution Overview
Problem
Spectroscopic modules configured with a spectroscopic portion and photodetector facing each other via a space are prone to positional deviations due to stress or thermal strain during mounting on rigid wiring substrates, leading to a decline in detection accuracy.
Innovation Solution
A spectroscopic module with a support body having a bottom wall and side wall surrounding a space, where the spectroscopic portion and photodetector face each other via this space, and a wiring unit with terminals that are electrically connected to the photodetector, allowing for reliable electrical connection and minimizing deviations due to stress or thermal strain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the spectroscopic portion and photodetector face each other via a space supported by a rigid support body, then the structure is simple and easy to manufacture, but the positional relationship between the spectroscopic portion and photodetector deviates when the support body is distorted during or after mounting, causing the relationship between photodetection channel and peak wavelength to deviate
Solution Approach 1:
The support body is divided into a first support body holding the spectroscopic portion and a second support body holding the photodetector. These two support bodies can independently absorb stress and thermal strain, preventing distortion of the optical path and maintaining the positional relationship between the spectroscopic portion and photodetector, thus preserving detection accuracy while keeping the structure manufacturable.
Solution Approach 2:
A wiring unit with flexible wiring is introduced as an intermediary between the two support bodies. This wiring unit acts as a buffer that can absorb stress and thermal strain, preventing direct transmission of distortion forces to the optical components, thereby maintaining measurement precision while allowing easy assembly and manufacturing.
2Measurement precision
If the spectroscopic portion and photodetector are directly connected via a rigid structure, then the positional relationship is stable, but the structure becomes complex and the mounting process generates stress that distorts the support body
Solution Approach 1:
The rigid structure is segmented into two separate support bodies (first and second support bodies) that are connected through a flexible wiring unit. This segmentation maintains the stable positional relationship of each component while reducing overall structural complexity and minimizing stress transmission during mounting.
Solution Approach 2:
The wiring unit with flexible wiring replaces part of the rigid structure, providing both mechanical connection and stress absorption. This flexible element maintains electrical connectivity while preventing stress-induced distortion, thereby preserving detection accuracy without requiring a complex rigid framework.
3Measurement precision
If the support body is made rigid to maintain positional relationship, then detection accuracy is maintained, but thermal strain during mounting causes distortion of the support body
Solution Approach 1:
The support structure is segmented into two independent support bodies connected by a flexible wiring unit. This segmentation allows each support body to expand and contract independently under thermal strain, preventing distortion of the optical path and maintaining detection accuracy while reducing the impact of thermal effects.
Solution Approach 2:
The wiring unit is designed with flexible wiring that can change its physical parameters (length, curvature) in response to thermal strain. This parameter change allows the wiring unit to absorb thermal expansion and contraction, preventing transmission of thermal stress to the optical components and maintaining detection accuracy.
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 solution effectively suppresses deviations in the relationship between photodetection channels and peak wavelengths, thereby maintaining detection accuracy even under stress or thermal strain conditions.
Implementation Method 1
a spectroscopic portion provided on the one side of the bottom wall portion and having a plurality of grating grooves
Data Source
AI summary
A spectroscopic module includes a support body having a bottom wall portion and a side wall portion surrounding a space on one side of the bottom wall portion, a spectroscopic portion provided on the one side of the bottom wall portion and having a plurality of grating grooves, a photodetector attached to the side wall portion so as to face the spectroscopic portion via the space and having a plurality of photodetection channels, a plurality of first terminals provided on a surface of the support body on a side opposite to the space so as to be disposed along the surface of the support body and electrically connected to the photodetector, and a wiring unit having a plurality of second terminals respectively facing the plurality of first terminals and respectively joined to the plurality of first terminals and a plurality of third terminals respectively and electrically connected to the plurality of second terminals.