Spectrometer Module Light Shielding Wall Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing spectroscopic modules face issues with deteriorating light receiving regions and decreased signal-to-noise (S/N) ratio due to the thickness of the support baffle affecting optical paths, and the use of adhesive agents leading to outgas concentration, which degrades the performance of light detection elements.
Innovation Solution
A spectroscopic module design incorporating beam splitters, bandpass filters, and a light shielding portion with wall portions arranged along a direction and light passage spaces to separate optical paths, where the width of the light passage space is larger than the bandpass filter, reducing optical crosstalk and outgas concentration while improving S/N ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the support baffle is made thicker to prevent light crosstalk, then the light crosstalk between adjacent optical paths is suppressed, but the optical path length increases and the S/N ratio of the light detection elements decreases
Solution Approach 1:
The support baffle is divided into multiple wall portions that are arranged along the first direction with light passage spaces interposed therebetween. Each wall portion independently shields light in its respective region, preventing crosstalk between adjacent optical paths while allowing the light passage spaces to maintain shorter optical path lengths for better S/N ratio.
2Measurement precision
If the support baffle is made thinner to shorten optical path length and improve S/N ratio, then the S/N ratio of light detection elements improves, but the space in openings is narrowed and outgas concentration from adhesive agents increases, deteriorating light receiving regions
Solution Approach 1:
The support baffle is segmented into multiple wall portions with light passage spaces between them. This segmentation creates sufficient space within each light passage space to accommodate adhesive agents without excessive confinement, allowing outgases to dissipate more effectively while maintaining a thin overall structure for shorter optical path lengths and improved S/N ratio.
3Object-affected harmful factors
If the light passage space width is increased to reduce outgas concentration, then the outgas concentration decreases and light receiving regions are protected, but the module size increases
Solution Approach 1:
The light passage spaces are configured with optimized dimensions in multiple directions, with the width in the third direction being larger than the width in the first direction. This dimensional optimization allows sufficient space for outgas dissipation while maintaining a compact overall module size through efficient spatial 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 design effectively suppresses the deterioration of light receiving regions and enhances the S/N ratio by optimizing the optical path lengths and reducing outgas concentration, leading to improved performance and reduced module size.
Implementation Method 1
a light shielding portion that is disposed between the plurality of bandpass filters and the light detector. The light shielding portion includes a plurality of wall portions that are arranged along the first direction with a light passage space interposed therebetween, each of a plurality of optical paths from the plurality of bandpass filters to the plurality of light receiving regions passing through the light passage space
Implementation Method 2
a plurality of bandpass filters that are disposed on one side in a second direction intersecting the first direction with respect to the plurality of beam splitters, each of the plurality of bandpass filters facing each of the plurality of beam splitters
Implementation Method 3
a plurality of beam splitters that are arranged along a first direction; a plurality of bandpass filters that are disposed on one side in a second direction intersecting the first direction with respect to the plurality of beam splitters
Data Source
AI summary
In a spectroscopic module, a light shielding member is disposed between a plurality of bandpass filters and a light detector. The light shielding member includes a plurality of wall portions. The plurality of wall portions are arranged along an X direction with a light passage opening interposed therebetween, each of a plurality of optical paths from the plurality of bandpass filters to a plurality of light receiving regions passing through the light passage opening. A first wall portion and a second wall portion adjacent to each other among the plurality of wall portions are in contact with the bandpass filter, the bandpass filter corresponding to the light passage opening between the first wall portion and the second wall portion. A width in a Y direction of the light passage opening is larger than a width in the Y direction of the bandpass filter.