Saturated crosstalk and lateral spot modeling simulation method for laser irradiation TDI-CCD (Trandport Driver Interface-Charge Coupled Device)

Abstract

The invention discloses a saturated crosstalk and lateral spot modeling simulation method for a laser irradiation TDI-CCD (Trandport Driver Interface-Charge Coupled Device), and mainly solves the problem in the prior art that adaptation is poor under a situation of remote incidence out of a field of view. The implementation scheme for the method is as follows: according to the signal conversion characteristics of a TDI-CCD imaging system, establishing a camera optical system basic model, adding a lateral spot effect into the basic model to obtain laser incidence model out of the field of view,adopting the laser incidence model out of the field of view to carry out push-broom imaging on a target area under interference, and establishing the saturated crosstalk effect full-link model of a TDI-CCD camera; and in the full-link model, regulating an incidence laser parameter, and obtaining a simulation output effect under different laser incidence conditions. By use of the method, saturatedcrosstalk phenomena under different laser parameters and camera parameters can be conveniently researched, a support is provided for the application of the laser interference TDI-CCD camera, and themethod can be used for the research and development design of an air-space base interference laser.

Description

technical field [0001] The invention belongs to the technical field of image processing, and further relates to a linear array TDI-CCD saturation crosstalk effect and a modeling and simulation method for side spots in infrared image processing, which can be used to provide reference data for laser interference experiments and space-based laser interference weapons R&D design. Background technique [0002] Linear array TDI-CCD is a device that is arranged in an area array but still relies on scanning for imaging. By exposing the same target multiple times, the linear array TDI-CCD imaging device can obtain a sufficiently high signal-to-noise ratio and photoelectric sensitivity, and has High responsiveness, wide dynamic range and other advantages. Using laser interference to break through the spaceborne satellite monitoring technology based on the linear array TDI-CCD push-broom imaging mode mainly uses laser beam irradiation to make the photoelectric sensor of the system con...

AI Technical Summary

Problems solved by technology

[0004] However, the existing research has not yet carried out the full-link analysis of signal level information based on the mechanism of laser irradiation TDI-CCD camera saturation and crosstalk signal transmission and conversion, and the models built are based on specific cases in some qualitative experimental phenomena. As a result, the system cannot separate and discuss the sub-modules of the interference link, and cannot optimize the overall performance parameters. When the parameters of the detector, optical system or laser light source change, the whole process cannot be adjusted to achieve the best interference effect.

In fact, most of the interfering lasers act on the target at a long distance, so the incident field of view is very small, and it is difficult to enter the target camera at an angle of 0°. The previous research aimed at the experimental analysis in the field of view is not suitable for actual combat applications, and there is no comprehensive consideration. Influence of Side Spot Phenomenon on Interference Imaging Effect of Laser Incident Condition Outside Field of View

From the perspective of evaluation of simulation results, the quantitative analysis of simulation results in previous studies is relatively simple, only a single evaluation factor is considered, and the analysis results cannot accurately describe the pros and cons of interference characteristics

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