Insulating Cooling Component for Scanning Microscope Detectors
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Solution Overview
Problem
Existing scanning microscopes face inefficiencies in cooling detectors at different electrical potential levels, leading to inadequate noise reduction and ineffective cooling, particularly when using Peltier elements and airtight encapsulations, which are costly and difficult to implement.
Innovation Solution
A scanning microscope design featuring a detector housed with a cooling component that is electrically insulating, allowing for efficient heat dissipation through a thermally conductive, electrically insulating intermediate element, such as a passive cooling ring, which can be in contact with the light sensor or its substrate, and an active cooling component like a Peltier element, ensuring effective cooling without wasting cooling capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a Peltier element is used to cool the detector, then cooling capacity is improved, but electrical insulation between detector and housing becomes difficult to achieve
Solution Approach 1:
The patent introduces a cooling component made of electrically insulating material (such as ceramic or plastic) as an intermediary between the Peltier element and the detector. This intermediate cooling component enables thermal conduction while maintaining electrical insulation, allowing the detector to be cooled effectively without requiring complex electrical insulation arrangements between the detector and housing.
2Object-generated harmful factors
If the detector is cooled to reduce dark current noise, then noise reduction is improved, but condensation forms on the detector surface
Solution Approach 1:
The patent extracts the condensation problem by introducing a heating element or heating component near the detector or on the housing interior. This heating component raises the local temperature to prevent condensation formation, while the detector itself remains cooled through the thermally conductive electrically insulating cooling component. Thus, the harmful effects of cooling (condensation) are separated from the beneficial effects (noise reduction).
Solution Approach 2:
The patent changes the temperature parameter locally by introducing a heating component that creates a temperature gradient. The detector surface is maintained at a low temperature for noise reduction, while the surrounding housing interior or specific zones are heated to prevent condensation. This parameter change allows simultaneous achievement of noise reduction and condensation prevention.
3Measurement precision
If the detector is operated at high voltage for photoelectron acceleration, then detection sensitivity is improved, but electrical insulation requirements increase
Solution Approach 1:
The patent uses the thermally conductive electrically insulating cooling component as a mediator that provides both cooling and electrical insulation functions. This single component eliminates the need for separate insulation structures, reducing device complexity while enabling high voltage operation for improved detection sensitivity.
Solution Approach 2:
The cooling component is designed to perform multiple functions simultaneously: it provides thermal conduction for cooling the detector, provides electrical insulation between the high-voltage detector and low-voltage housing, and can also serve as a mechanical support structure. This multi-functionality reduces the number of components needed and simplifies the overall device design.
4Reliability
If airtight encapsulation is used to protect the detector, then reliability is improved, but manufacturing cost increases
Solution Approach 1:
The cooling component serves multiple functions including structural support, thermal management, and electrical insulation. By integrating these functions into a single component, the patent reduces the number of separate parts that need to be assembled and sealed, thereby reducing manufacturing complexity and cost while maintaining reliable protection of the detector.
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 design achieves enhanced cooling efficiency while maintaining electrical insulation, reducing noise, and preventing condensation on entry windows, even at high voltage differences between the detector and housing, with reduced waste heat and lower cooling capacity requirements.
Implementation Method 1
the cooling component located in the housing and having a first side facing the detector and a second side facing the housing, wherein the cooling component is in thermal contact with the detector on the first side and with the housing on the second side, wherein the cooling component is designed as an electrical insulator
Implementation Method 2
the cooling device, typically a Peltier element
Data Source
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AI summary
The detector apparatus (1) has a housing (4) in which a detector (5) is arranged. A cooling component (11) is in direct contact with detector for cooling the detector. An electrically insulating structure (12) is provided to insulate the detector with respect to housing. The detector is provided with a light sensor e.g. photocathode (8) that is arranged on a substrate (7) for receiving to be detected light entering through an entry optic (9) of housing.