Spectrometer Package With Buried Leads And Inner Wall Regulation
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Solution Overview
Problem
Downsized spectrometers face challenges in maintaining positional accuracy and reliability due to vibration and thermal loads, leading to stray light and inaccurate spectral characteristics, as existing designs with narrow clearance between optical elements and a cantilevered fixture can result in optical element breakage and poor positional accuracy.
Innovation Solution
The spectrometer design securely supports the spectroscopic module within a package using an inner wall regulation system, with a substrate and lens portion, and buried leads to prevent movement and deviation, ensuring accurate positioning and assembly, while using a light-blocking resin to prevent stray light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the spectrometer is downsized with narrow clearance between optical elements and the vessel, then the spectrometer size is reduced, but the optical elements may contact the vessel wall and break, and positional accuracy deteriorates
Solution Approach 1:
The invention introduces a support plate that extends in the longitudinal direction (third dimension) to provide lateral support for optical elements. This dimensional extension allows the optical elements to be supported not only from below but also from the sides, preventing contact with the vessel wall while maintaining compact transverse dimensions.
Solution Approach 2:
The support plate acts as an intermediary structure between the vessel bottom and the optical elements. It provides a stable mounting surface and lateral support, mediating the spatial relationship between the optical elements and the vessel wall to prevent direct contact and breakage.
2Ease of manufacture
If the element attachment portion cantilevers the vessel fixture portion, then assembly is simplified, but positional accuracy of optical elements deteriorates under vibration and thermal load
Solution Approach 1:
The support plate extends in the longitudinal direction to provide lateral support, creating a three-dimensional support structure rather than a simple planar attachment. This dimensional extension provides multiple support points that constrain optical element position in multiple directions, maintaining accuracy under vibration and thermal load.
Solution Approach 2:
The invention changes the support parameters by providing both vertical support (from the vessel bottom through the support plate) and lateral support (from the extended support plate portions). This multi-directional support parameter configuration maintains positional accuracy under various environmental conditions.
3Volume of moving object
If the clearance between optical elements and vessel wall is reduced for downsizing, then spectrometer size is reduced, but stray light increases due to poor positional accuracy
Solution Approach 1:
The extended support plate provides lateral support that maintains precise positioning of optical elements even when transverse clearance is reduced. This three-dimensional support structure ensures optical elements remain accurately positioned to prevent stray light generation while allowing compact spectrometer design.
Solution Approach 2:
The support plate provides beforehand support and positioning for optical elements, preventing them from shifting or contacting vessel walls that would generate stray light. This pre-positioning and stabilization prevents stray light issues before they occur during operation.
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 design allows for the downsizing of spectrometers while maintaining reliability and achieving accurate spectral characteristics by securely supporting optical elements and preventing stray light, enhancing positional accuracy and assembly efficiency.
Implementation Method 1
a light detecting element is used to detect spectral components of the light dispersed by the spectroscopic portion
Data Source
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AI summary
In a state that the body portion 4 is regulated by inner wall planes 27, 29, 28 of the package 3 so as not to move in parallel or perpendicularly with respect to the rear plane 4b, the spectroscopic module is directly supported by the package 3, thereby when the spectrometer is downsized, the spectroscopic module 2 can be supported securely and also there is provided securely a positional accuracy between the light incident opening 22a of the package 3, the spectroscopic portion 6 of the spectroscopic module 2 and the light detecting element 7. Further, the lead 23 is buried into the package 3 to give derivation and support by the lead deriving portion 26, thereby the lead deriving portion 26 in itself of the package 3 is allowed to act as a base when wire bonding is conducted to electrically connect the lead 23 with the light detecting element 7, thus preventing breakage and deviation of the spectroscopic module 2.