Focal plane chip, pixel unit and array for collecting and processing laser signals

A technology of pixel unit and laser signal, applied in the field of laser detection, can solve the problems of inaccurate measurement, slow scanning speed, low image spatial resolution, etc., and achieve the effect of improving scanning speed, simple circuit and high image spatial resolution.

Active Publication Date: 2020-08-18
NINGBO ABAX SENSING ELECTRONICS TECH CO LTD
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Problems solved by technology

[0004] Based on the above background, in order to solve the problems of inaccurate measurement, slow scanning speed and low spatial resolution of the image in the existing laser radar speed measurement and distance measurement system, the present invention provides a focal plane chip, pixel unit and array for collecting and processing laser signals

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  • Focal plane chip, pixel unit and array for collecting and processing laser signals
  • Focal plane chip, pixel unit and array for collecting and processing laser signals
  • Focal plane chip, pixel unit and array for collecting and processing laser signals

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Embodiment Construction

[0047] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0048] see Figure 1 to Figure 4 , the focal plane chip provided by the present invention includes a substrate 202 (material is Si) and a pixel unit array 206 integrated on the substrate 202, a signal processing circuit 212, a timing control circuit and a row selection module; The interconnection metal 205 (the interconnection metal is used as a contact to realize the connection between the device and the Si substrate) is integrated with the metal wiring layer 204 , and the metal wiring layer 204 is connected to the signal processing circuit 212 through the data column line 207 .

[0049] Such as figure 1 with 2 As shown, the metal wiring layer 204 is composed of a plurality of metal wiring units, and each metal wiring unit corresponds to a pixel unit; each metal wiring unit is composed of multiple metal layers and multiple dielectric layers, and on each metal laye...

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Abstract

In order to solve problems that the current laser radar speed measurement and range finding system is not accurate in measurement, slow in scanning speed and low in image spatial resolution, the invention discloses a focal plane chip, a pixel unit and a pixel unit array for collecting and processing laser signals. The pixel unit comprises photodiodes and a sampling / processing circuit which is connected to and integrated with the negative electrodes of the photodiode diodes; each pixel unit in the pixel unit array corresponds to a complete sense circuit; in a working process, every pixel unit performs data transformation at the same time; compared with a traditional single-point detection mode, the focal plane chip, the pixel unit and the pixel unit array of the invention can greatly improve the scanning speed of the speed measurement and range finding system; and each photoelectric diode of the pixel unit array goes through a camera and corresponds to a different spatial visual field angle, and thus an image spatial resolution is high.

Description

technical field [0001] The invention belongs to the technical field of laser detection, and in particular relates to a focal plane chip, a pixel unit and a pixel unit array for collecting and processing laser signals. Background technique [0002] Speed ​​measurement and ranging coherent lidar is one of the comprehensive applications of lidar technology, coherent detection technology, and signal processing technology. It is widely used in many fields such as aerospace, target monitoring, and wind field measurement. It has broad applications in military and civilian fields. prospect. However, when laser radar is used to measure the speed and range of moving objects, especially moving vehicles, there will be strong interference between vehicles if laser signals are emitted at the same time or time-sharing to detect the distance and speed of the target because there are many vehicles on the road. It is easy to cause the problem of inaccurate measurement. [0003] In addition,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/48G01S17/08
CPCG01S7/4802G01S17/08
Inventor 雷述宇
Owner NINGBO ABAX SENSING ELECTRONICS TECH CO LTD
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