Analysis of Influence of CCD′s Nonlinear Photoelectric Characterization on Evaluating the High Power Laser Beam Quality

Yaqun, 刘亚群 Liu; Shunxing, 唐顺兴 Tang; Yajing, 郭亚晶 Guo; Zijian, 崔子健 Cui; Xiuqing, 姜秀青 Jiang; Baoqiang, 朱宝强 Zhu

doi:10.3788/cjl201542.0402001

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“…With the wide application of CCD in image acquisition and photoelectric measurement, the parameter measurement method using area array CCD as detector shows great advantages. Although CCD is widely used in image acquisition, photoelectric measurement and other fields, it often fails to achieve the expected effect in the laser measurement and test [1][2] . For example, in the process of measuring the characteristics of laser spot or testing the laser jamming effect, the measurement dynamic range of CCD will become smaller due to the existence of saturated crosstalk effect [3][4] .…”

Section: Introductionmentioning

confidence: 99%

Measurement of laser energy distribution on the target surface of CCD detector by image fusion method

Zhou

Zhang²,

Wang³

et al. 2022

Sixth International Symposium on Laser Interaction With Matter

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Square array CCD detector is widely used in image acquisition, photoelectric measurement and other fields. However, its inherent dynamic range is affected by noise and saturation crosstalk effect, which can not meet the application requirements of laser jamming effect measrement. In this paper, an image date fusion method based on linear compensation and orthogonal compensation is proposed. By controlling the jamming laser power, collecting multi-frame laser jamming effect images, and making full use of the effective measurement information in the image for compensation, the target laser energy distribution data with lager dynamic range can be obtained. In the experiment, the laser energy distribution on the target surface diffracted by circular aperture and rectangular aperture is inversed respectively, and the dynamic range is expanded by 40dB.

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Section: Introductionmentioning

confidence: 99%