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A Measuring Method for Precise Delay of Optical Imaging System

A technology of an optical imaging system and a measurement method, which is applied in the field of measurement of the time delay of the optical imaging system, can solve problems such as delay time errors, and achieve the effect of simple implementation and strong versatility

Active Publication Date: 2019-12-31
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the error of estimation, there is a certain error in the calculated delay time

Method used

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  • A Measuring Method for Precise Delay of Optical Imaging System
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  • A Measuring Method for Precise Delay of Optical Imaging System

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Embodiment Construction

[0026] Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail:

[0027] In order to obtain accurate delay time, it must be precisely controlled from the source. The optical system images a specific area, and the optical image is sensed to the surface of the sensor. Optical image acquisition is an integral process. The moment from the start of integration is the moment of optical signal perception, and the integration process is controlled by the exposure pulse.

[0028] The present invention only controls the source and final time. like image 3 As shown, the device under test is placed in a dark room (a laboratory without a light source), and the timing controller generates a control pulse, which is used as the turn-on moment of the LED lighting; at the same time, this pulse is used as the exposure start time T1 of the imaging system under test, And record that moment with an oscilloscope. Since the LED lighting ...

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Abstract

The invention provides a measurement method for accurate time delay of an optical imaging system. The process of measurement is simple and convenient, and a measurement result is more accurate. According to the measurement method, the whole optical imaging system is regarded as a black box, by establishing a simulated scene, a light source and a camera are started synchronously, the accurate inputmoment of a scene signal is obtained, the input moment of the scene signal and the output moment of final data are recorded, the time difference between the two moments is recorded through an oscilloscope, and therefore accurate time delay of the system is obtained. In the method, there is no need to determine time delay of signals of all steps in the optical system, the delay time of the whole optical system can be determined only by determining the accurate start moment and output moment of the signals, and the measurement method has the advantages of being realized easy and conveniently and being efficient and high in generality.

Description

technical field [0001] The invention relates to a measurement method for time delay of an optical imaging system, which can be applied to the delay time measurement of multi-channel output area array, line array CCD imaging devices and CMOS imaging devices. Background technique [0002] The delay time of the optical imaging system is of great significance to the accuracy of measurement and tracking performance in practical applications. Latency is also one of the main metrics used for tracking systems etc. The delay time of the optical imaging system is used to track the input index of the system and measure the system. It is used to calculate the delay of the scene and the displacement of the tracking target to play a key factor. [0003] Each link (signal flow direction) of the optical imaging system is as follows: figure 1 Shown: The imaging of the scene by the optical imaging system is a process of sampling the scene, and the resolution is the process of sampling the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/02
CPCG01M11/02
Inventor 王浩易磊陈紫旭闫阿奇杨磊王华冯佳边河
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI