基于过扫数据抑制大面阵CCD图像漂移方法

Algorithms of the Restraining CCD image drifting by overscan data

摘要:

研制阶段的全帧转移大面阵CCD器件在测试过程中,存在连续采集的多帧图像数据随时间漂移的情况,导致CCD器件读出噪声和本底统计结果偏大。为保证CCD器件读出噪声和本底统计数据的准确性,经分析研究CCD器件成像特性和测试电路特性,采用器件读出过扫行数据对器件有效像元数据进行校正的方法,对器件读出噪声和本底统计结果进行校正,并对不同工艺器件进行测试验证。结果表明采用器件读出过扫行数据进行校正的方法能有效抑制器件有效像元数据漂移导致的CCD器件读出噪声和本底统计数据偏大情况,得到真实准确的测试结果。

Abstract:

In the testing process of the full-frame transfer large-area array CCD device in the development stage, there is a situation that the multi-frame image data continuously drifts with time, which leads to the CCD device readout noise and background statistics inaccuracy. In order to ensure the accuracy of the readout noise and background statistics data of the CCD device, the imaging characteristics and circuit characteristics of the CCD device are analyzed and studied. The method of correcting the effective pixel area data by overscan data is adopted to correct the readout noise and background statistics results.