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Single-photon array-based gated diffuse reflection imaging system and method

An imaging system and diffuse reflection technology, which can be used in the re-radiation of electromagnetic waves, radio wave measurement systems, and the use of re-radiation.

Active Publication Date: 2019-06-28
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing research on imaging around angles mostly uses streak cameras and iCCD (intensified Charge-Coupled Device) cameras as detectors, but streak cameras and iCCD cameras are very expensive and cannot be used in practical operations, and the detection range is small, and the data collected too long
Using a photoelectric hybrid device as a detector reduces the cost of experimental equipment, but the time resolution and spatial resolution that this device can provide are very low
In summary, the current angle-around imaging technology has great limitations in terms of high cost and imaging accuracy.

Method used

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  • Single-photon array-based gated diffuse reflection imaging system and method
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  • Single-photon array-based gated diffuse reflection imaging system and method

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Embodiment Construction

[0064] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0065] like figure 1 As shown, the system of the present invention includes a laser transmitter 1, a scanning galvanometer system 2, an intermediate reflection surface 3, an obstacle 4, a hidden target 5, a distance gating module 6, a microlens group 7, a SPAD array detector 8, and a time-correlated Photon counter 9, digital processing unit 10;

[0066] The digital processing unit 10 is connected with the laser transmitter 1, the scanning galvanometer system 2, the distance gating module 6, the microlens group 7, the SPAD array detector 8 and the time-correlated photon counter 9, and the laser transmitter 1 is connected with the scanning galvanometer system 2 Connection, the output end of the distance gating module 6 is connected to the input end of the SPAD array detector 8 through the microlens group 7, the output end of the SPAD array dete...

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Abstract

The invention discloses a single-photon-array-based gating type diffuse reflection winding-angle imaging system and method. The system is composed of a laser emitter, a scanning galvanometer system, an intermediate reflecting surface, a distance gating module, a micro lens group, an SPAD array detector, a time-dependent photon counter and a digital processing unit. Laser emitted by the laser emitter is reflected by the surface of the intermediate reflecting surface, the surface of a hidden target, and the intermediate reflecting surface successively and then the reflected laser passes by the distance gating module; the laser is collected by the SPAD array detector; and the time-dependent photon counter is triggered. A time photon counting histogram is obtained according to the photon number and photon arrival time obtained by statistics by the time-dependent photon counter. And then the digital processing unit processes a plurality of time photon counting histograms according to a time sequential order to complete three-dimensional reconstruction of the hidden target object.

Description

technical field [0001] The present invention relates to a gated diffuse reflection around-angle imaging system and method, in particular to a single-photon array-based gated diffuse reflection around-angle imaging system and method. Background technique [0002] In the process of detecting and imaging hidden targets around the angle, the energy of the received optical echo signal is extremely weak due to multiple diffuse reflections, usually so weak that there are only a few photon energies, or even a single photon. Single photon is no longer continuous light, and the energy of single photon is very small, and the photocurrent generated is lower than the noise of conventional photodetectors at room temperature. Therefore, special detection methods are required to detect this extremely weak photon echo signal . Photon counting using single-photon detectors for photon detection is an important low-light signal detection technology. Particle physics, long-range laser three-di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S17/89
CPCG01S17/89
Inventor 苏秀琴邬京耀李哲郝伟镡京京姜凯张占鹏
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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