中文摘要：

提出一种激光全息特性参数检测方法。以不稳定度为5%的He-Ne激光器为光源,利用同一光束分成的反射光和透射光光强度比例恒定的性质,实时探测衍射光强与反射光强,得到全息防伪标识的衍射效率。给出了实际入射光强与根据反射光强计算得来的入射光强两者的对比曲线,以及对8版不同样品衍射效率的测量结果。实验数据表明：透射光强测量值相对误差不超过0.29%;衍射效率测量值相对误差最大值不超过0.81%,比原方法测量精度提高近一倍。

英文摘要：

A new method was proposed to measure the characteristic parameter of the laser holographic anti-counterfeiting label, with less dependency on the stability of source light. The He-Ne laser, having 5% instability, was used as the light source. Based on the nature that one beam of light can be divided into two beams at a fixed ratio, the source light was divided into the reflex and the transmission by a piece of glass, the intensities of the reflex and the diffraction were measured online and in real time, and diffraction efficiency of the holographic anti-counterfeiting label was obtained. The contrast curve was given, which showed the differences between the real value and the calculated value of the intensity of the transmission as the incident beam. The measurement results of the diffraction efficiency of 8 different version labels were also listed. The experimental data demonstrates that the relative error of the transmission intensity is not more than 0.29%, and that of the diffraction efficiency is less than 0.81%, which is approximately the half of error of the original method.