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Cooled photomultiplier tube-based photodetectors and related apparatus and methods to reduce condensation

A photodetector and equipment technology, applied in electron multiplier tubes, electrical equipment structural parts, discharge tubes, etc., can solve problems such as bulky, polluted samples, and excessive cooling PMT.

Active Publication Date: 2020-09-08
MOLECULAR DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cooled PMTs are commercially available, but are too large for integration into a typical optical-based analytical instrument where space is already constrained and the overall size or footprint is a user concern or unacceptably bulky
In addition, known cooled PMTs often allow condensation to form on the PMT, which may contaminate the sample being studied, or the instrument's sensitive optics and / or electronics

Method used

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  • Cooled photomultiplier tube-based photodetectors and related apparatus and methods to reduce condensation
  • Cooled photomultiplier tube-based photodetectors and related apparatus and methods to reduce condensation
  • Cooled photomultiplier tube-based photodetectors and related apparatus and methods to reduce condensation

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Embodiment Construction

[0018] figure 1 It is a schematic diagram of an example of a sample analysis device or system 100 according to some embodiments. The sample analysis device 100 is configured to perform optical measurement on a sample or component (one or more components) of a sample such as a chemical compound, a biological compound, a biological cell, etc. Optical measurements can be based on, for example, luminescence, fluorescence, absorbance, cell imaging, etc. In some embodiments, the sample analysis device 100 is configured to enable the user to select the desired type of optical measurement to be performed. For example, the user can reconfigure the optics of the sample analysis device 100 to implement a desired type of luminescence measurement, fluorescence measurement, or absorbance measurement. Therefore, in some embodiments, the sample analysis device 100 may be a multi-mode reader. For example, as described above, the multi-mode reader can be reconstructed in the following way: ena...

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Abstract

A photodetector includes a cooling device between a photomultiplier tube (PMT) device and a heat sink. A thermally conductive shroud encloses the PMT device and cooling device and is in thermal contact with the heat sink such that the heat sink transfers heat to the shroud. A photodetector may be included in a sample analysis device configured to take optical measurements of a sample.

Description

Technical field [0001] The present invention generally relates to a photodetector including a photomultiplier tube (PMT), and particularly relates to a photodetector capable of preventing or reducing the formation of condensation on the PMT and other components of the photodetector while cooling the PMT. Background technique [0002] The light detector can use a photomultiplier tube (PMT) to detect light, especially light from weak or dark light sources. PMT is a vacuum tube encapsulated with a photocathode, electron multiplier and anode. According to the photoelectric effect, incident photons hit the photocathode causing the photocathode to emit electrons (photoemission). The electrons are multiplied by an electron multiplier that includes a series of multiplier electrodes. The multiplier electrode causes continuous secondary electron emission, eventually generating enough electrons to generate a useful current that can be correlated with photon count or intensity. For many o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/15H01J43/28G01N21/64
CPCG01N21/15G01N21/645H01J43/28G01N21/6452G01N2021/158H05K7/20163G01J5/061G01J2005/065G01J5/064
Inventor 迈克尔·卡茨林格伯恩哈德·申瓦尔德斯特凡·奥尔
Owner MOLECULAR DEVICES