Planar Lens Face Joined to Imaging Sensor in Catheter
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Solution Overview
Problem
Conventional electronic visualized catheters face challenges in achieving a wide angle of view and are prone to debris and fluid ingress between the object lens system and the light receiving surface due to a separated lens structure.
Innovation Solution
The imaging part of the catheter features a planar output lens face of the object lens system joined directly to the light receiving surface of the solid state imaging element, eliminating the gap and using a flexible printed wiring board with a U-shaped configuration to bring the lens system close to the imaging element, reducing the risk of debris and fluid ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the object lens system is separated from the light receiving surface of the solid state imaging element, then the image distance increases, but the angle of view becomes narrower and the lens structure becomes more complex
Solution Approach 1:
The patent merges the object lens system and the solid state imaging element by joining the output lens face directly to the light receiving surface, eliminating the gap between them. This integration reduces the image distance while maintaining a wide angle of view, thereby simplifying the lens structure without compromising imaging performance.
2Measurement precision
If the object lens system is separated from the light receiving surface, then the image distance increases, but debris and fluids can easily infiltrate the gap
Solution Approach 1:
By directly joining the output lens face to the light receiving surface, the patent eliminates the gap that would otherwise allow debris and fluids to infiltrate. This merging of components creates a sealed interface that prevents harmful contaminants from entering the imaging path.
3Adaptability or versatility
If a lens with high refractive index and small diameter is used to achieve wide angle of view, then the angle of view increases, but the lens structure and processing become more complex
Solution Approach 1:
The patent achieves a wide angle of view by merging the lens system with the imaging element, allowing the use of simpler lens structures with standard materials and dimensions. The direct joining eliminates the need for complex high-refractive-index lenses with small diameters, thereby reducing manufacturing complexity while maintaining versatility.
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 enhances the angle of view and reduces the risk of interference from debris and fluids, allowing for clearer observation with a simpler and cost-effective design.
Implementation Method 1
a solid state imaging element which is positioned to receive light output from the object lens system and which photoelectrically converts the light output from the object lens system into an electric signal
Data Source
AI summary
An imaging part of an electronic visualized catheter including, an object lens system, and a solid state imaging element which is positioned to receive light output from the object lens system and which photoelectrically converts the light output from the object lens system into an electric signal, wherein an output lens face of the object lens system is planar, and the output lens face is joined to a light receiving surface of the solid state imaging element.