By means of projecting a reference light and measuring the light on the photocathode of a streak camera, the minimum excited threshold in electron trapping materials can be measured.
０６４μｍ超短红外脉冲激光激励下，采用参考光和测量光同时入射的测量方案，利用一台可见光条纹相机进行了电子俘获材料ＣａＳＥｕ，Ｓｍ的红外最小可激发阈值的研究，结果表明：在可见光条纹相机最小可探测能量密度Ｊｍｉｎ＝８。
