Heated Sensor Window Assembly for Condensation-Free Imaging
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Solution Overview
Problem
Condensation on transparent surfaces within imaging systems used for biological and chemical tests and assays, such as electrophoresis gels and blots, reduces image quality and accuracy due to the use of chemiluminescent, fluorescent, or phosphorescent markers.
Innovation Solution
A heated image sensor assembly with a thermally conductive thin film or heating frame maintains the sensor window at a temperature above ambient, preventing condensation by using thermal energy from a thermoelectric cooler to heat the sensor window or frame, thereby maintaining clear imaging conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor window is cooled to reduce thermal noise in imaging, then image sensitivity is improved, but condensation forms on the sensor window surface
Solution Approach 1:
The patent divides the thermal management system into separate zones: the image sensor is cooled independently while the sensor window is heated independently. This segmentation allows each component to operate at its optimal temperature without causing condensation on the window.
Solution Approach 2:
The patent introduces an intermediary heating element (heating frame or heating film) positioned between the cooling system and the sensor window. This intermediary transfers thermal energy to the sensor window, preventing condensation while allowing the image sensor to remain cooled for sensitive detection.
2Reliability
If the sensor window is heated to prevent condensation, then imaging clarity is maintained, but additional heating components increase device complexity
Solution Approach 1:
The patent combines the heating function with the existing structural frame or mounting components. The heating frame utilizes the structural frame itself as the heating element, and the heating film is integrated into the window assembly, thereby reducing the need for separate, complex heating systems.
Solution Approach 2:
The heating system is designed to be self-regulating, where the heating elements automatically maintain the sensor window temperature above the dew point without requiring complex external control systems. The system self-adjusts to prevent condensation while minimizing energy consumption.
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 condensation on the sensor window, ensuring clear and accurate imaging by maintaining the sensor window temperature above ambient, thus enhancing image quality and precision.
Implementation Method 1
the sensor window is heated with the heat generated by the TEC
Data Source
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AI summary
An image sensor assembly having a sensor window positioned in front of an image sensor, having structure and/or characteristics to prevent the formation of condensation on the sensor window. Structure to prevent the formation of condensation includes thin films which can have anti-condensation, anti-reflective, electrically conductive, and/or thermally conductive properties. The sensor window can further have a textured surface to displace water so as to avoid condensation formation on the window surface. The sensor window, and in some embodiments a frame, can be maintained at an elevated temperature proximate to the image sensor during operation to prevent the formation of condensation.