【摘要】 采用真空蒸发的方法制作变透过率的Cr膜中性密度滤光片,安装在CCD接受窗之前,不同程度的衰减卤钨灯能量相对过高的波段,使各部分能量趋于平衡,通过实验得出该方法能够提高可见部分的动态测量范围,并且为真空蒸发方法制作特定厚度膜层提供理论依据。更多还原

【Abstract】 A method of adding a Cr neutral filter whose transmittance is step-changing in front of CCD receiv-ing window is proposed in this paper,it is produced by vacuum vaporizing,this filter can attenuate the power of the higher parts of the halogen tungsten light,and adjust light source at the same time can make the spec-trum power balance relatively.Through the experiments it is proved increasing the measuring range of visible parts,and a basic theory is proposed for coating fixed thickness film by vacuum vaporizing.更多还原