Refractive Index Matching Element for Photoconductor Reflectance Control
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Solution Overview
Problem
Variations in imaging oil layer thickness at the photoconductor surface in LEP printers cause significant print quality issues due to inconsistent reflectance, leading to visible defects and potential damage to printer components.
Innovation Solution
An element with a refractive index within a predefined tolerance of the imaging oil is brought into contact with the photoconductor surface, effectively increasing the imaging oil thickness to minimize reflectance variance without the issues associated with excessive oil thickness, such as splashing and charging problems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the imaging oil layer thickness is increased to reduce reflectance variance, then print quality improves, but the imaging oil may splash off the photoconductor and cause charging issues
Solution Approach 1:
An element with refractive index matching imaging oil is introduced as an intermediary between the light source and the photoconductor surface. This mediator reduces reflectance variance by minimizing optical impedance mismatch, allowing sufficient imaging oil thickness for print quality without causing splashing and charging issues
Solution Approach 2:
The refractive index parameter of the element is specifically selected to match the imaging oil, changing the optical parameters of the system to reduce reflectance variance while maintaining appropriate imaging oil thickness
2Reliability
If the imaging oil layer thickness is decreased to prevent splashing and charging issues, then reliability improves, but reflectance variance causes print quality defects
Solution Approach 1:
The refractive index matching element serves as an optical intermediary that decouples the relationship between imaging oil thickness and reflectance variance, allowing thin imaging oil layers that prevent splashing while maintaining print quality through reduced optical reflectance variations
3Stability of the object's composition
If a thick layer of imaging oil is applied to the photoconductor surface, then reflectance variance is reduced, but the imaging oil splashes off and causes charging problems
Solution Approach 1:
The refractive index matching element is positioned as an intermediary optical component that reduces reflectance variance without requiring excessive imaging oil thickness, thereby preventing splashing and associated charging problems while maintaining reflectance consistency
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 approach enhances print quality by reducing reflectance variance at the photoconductor surface, preventing print defects and damage to printer components, while maintaining optimal imaging oil performance.
Implementation Method 1
An element having a first refractive index that is within a predefined tolerance of a second refractive index of the imaging oil at the photoconductor surface is brought into contact with the imaging oil at the photoconductor surface
Data Source
AI summary
In an example of the disclosure, an imaging oil is applied upon a photoconductor surface. An element is brought into contact with the imaging oil at the photoconductor surface. The element has a first refractive index that is within a predefined tolerance of a second refractive index of the imaging oil. The photoconductor surface is exposed to light emitted by a writing component. The light passes through the element and the imaging oil.