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A Multiplexing Photon Correlator Based on Field Programmable Gate Array

A photon correlator and multiplexing technology, which is applied in the field of photon correlation spectroscopy measurement, can solve the problem of inaccurate inversion of sample particle size and particle size distribution

Active Publication Date: 2018-04-03
清远华奥光电仪器有限公司
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Problems solved by technology

[0003] However, for inhomogeneous samples, such as measuring proteins with chemical reactions in space or nanospheres with uneven temperature distribution, the traditional photon correlator, which can only obtain the autocorrelation function of single-point scattered light intensity signals, cannot accurately Inversion of sample particle size and particle size distribution

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  • A Multiplexing Photon Correlator Based on Field Programmable Gate Array
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  • A Multiplexing Photon Correlator Based on Field Programmable Gate Array

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[0035] The above content and the technical solution of the present invention have been fully disclosed, and the implementation of the present invention will be further described below in conjunction with the accompanying drawings, but the implementation and protection of the present invention are not limited thereto.

[0036] The system block diagram of this example is as follows figure 1 , the multi-channel photon signal enters the multi-channel photon counting module in the FPGA. The multiplexing photon correlator adopts the default configuration of the number of multiplexing channels, minimum sampling time and correlation operation time. The photon pulse signals in different sampling areas are counted at equal intervals. After the operation is started, the multi-channel photon counter module is in uninterrupted work, and the photon data of each channel is continuously sent to the multi-channel correlation calculation module. The multi-channel correlation operation module f...

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Abstract

The invention relates to a multiplexing photon correlator based on a field programmable gate array, specifically a field-based photon correlator that inputs multiple photon signals from a single port or multiple ports and can calculate the autocorrelation function of each signal within the measurement time. The multiplexing photon correlator of the programmable gate array (FPGA) is mainly composed of a system synchronous operation module, a multi-channel photon counting module, a multi-channel correlation operation module and a communication interface module. The present invention is characterized in that through time division multiplexing, multiple photon signals are input in a serial manner from a single port and a multi-port, the autocorrelation functions of each signal are respectively calculated within the measurement time, and the correlation operation results are output. Cooperating with a suitable optical path, the present invention can extend the photon correlation spectrum measurement technology from traditional single-point measurement to three-dimensional space measurement, so that it can be used in the fields of dynamic light scattering two-dimensional and three-dimensional imaging, multi-point dynamic light scattering signal monitoring, etc. The scope of application of photon correlation spectroscopy has been expanded.

Description

technical field [0001] The invention relates to the technical field of photon correlation spectrum measurement, in particular to a multiplexing photon correlator based on a field programmable gate array (FPGA). Background technique [0002] At present, the photon correlator used in photon correlation spectroscopy obtains the autocorrelation function of the single-point scattered light intensity signal, and then obtains the size and particle size distribution of the particles by the inversion algorithm program of the host computer. This type of photon correlator is measuring Accurate results are best obtained with homogeneous samples. For example, in Patent Document 1 (CN101726452A), a photon correlator based on field programmable gate array (FPGA) is provided, which can be used for hardware realization of light intensity autocorrelation function in photon correlation spectroscopy technology, and achieves sampling time, correlation Operation time is adjustable, and the numbe...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/02
Inventor 韩鹏许继森邱健骆开庆
Owner 清远华奥光电仪器有限公司
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