Fluorescence Imaging Light Source Unit Circuit Board Shielding
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Solution Overview
Problem
Fluorescence imaging apparatuses face issues with harmful light from the circuit board being imaged, which reduces contrast and quality of fluorescent images due to shared LED arrangements and light transmission properties of the substrate.
Innovation Solution
Incorporation of a light shielding section with through holes in the circuit board to prevent harmful light from one emission unit from transmitting to adjacent units, using conductive plating and specific hole arrangements to absorb or reflect harmful light, ensuring only intended excitation light reaches the sample.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple emission units share a common circuit board, then device complexity is reduced and manufacturing is simplified, but harmful light from the substrate transmits to adjacent units and degrades image quality
Solution Approach 1:
The circuit board is segmented into multiple isolated mounting areas for different emission units. Light shielding sections are formed between these mounting areas to divide the board into independent optical zones, preventing harmful light transmission while maintaining a unified circuit board structure for simplified manufacturing.
Solution Approach 2:
Light shielding sections act as intermediary elements between adjacent emission units on the circuit board. These shielding sections block harmful light from the substrate from transmitting to adjacent units, while allowing the circuit board to continue serving as a common mounting platform for all emission units.
2Measurement precision
If excitation light filters are used to narrow wavelength range, then measurement precision is improved, but light intensity is reduced
Solution Approach 1:
Each emission unit is provided with excitation light filters tailored to its specific wavelength requirements. The filters are selectively applied to each emission unit based on the excitation wavelength range needed for the corresponding fluorescent substance, optimizing both precision and intensity for each local application.
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
Prevents harmful light from affecting the fluorescent image, maintaining high contrast and image quality by isolating harmful light and ensuring only relevant excitation light is used, thereby enhancing the distinguishability of fluorescent substances.
Implementation Method 1
using conductive plating and specific hole arrangements to absorb or reflect harmful light
Implementation Method 2
using conductive plating and specific hole arrangements to absorb or reflect harmful light
Implementation Method 3
The light emitting element is an LED (Light Emitting Diode), for example
Implementation Method 4
The different types of emission units have different types of light emitting elements that emit different colors of light
Implementation Method 5
Each excitation light filter is disposed in front of at least one light emitting element in a direction of applying light and limits a wavelength range of the light from the light emitting element
Implementation Method 6
The fluorescence imaging apparatus applies excitation light to a sample containing a fluorescent substance (or fluorescent material) and detects excited fluorescence
Implementation Method 7
The fluorescent dye generates fluorescence by the application of the excitation light
Data Source
AI summary
A light source unit has two or more types of emission units which apply excitation light of three colors (blue, green, and red). The emission units share a single circuit board. LEDs of the respective emission units are mounted on the circuit board. An excitation light filter, which limits a wavelength range of light to generate the excitation light, is placed in front of each LED in direction of light emission from the LED. Each emission unit has a mounting area that faces the excitation light filter. Blue light from the LED excites resin contained in the circuit board and causes harmful light. Light shielding sections provided around the mounting area prevent the harmful light from being transmitted to another emission unit through the circuit board. Each light shielding section is composed of through holes.