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R-S-A1.1-(0.6)-...
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印刷业全息参考标记快速检测 全息标记的特点之一就是在特定的角度下，产生平行反射光束。对于大部分全息标记，这个角度是45°，并且反射回来的平行光束垂直于被测物的传输方向。不论是透明材质还是金属材质的全息标记，都可以精准的被SI传感器检测出来。 Super fast detection of holographic reference marks in the printing industry One of the properties of holographic marks is the direct back reflection of collimated, parallel light under a certain angle. For most of the holographic marks this angle is equal to 45° and the collimated beam is directed perpendicular to the transport direction of the printed foil. This behavior of direct back reflection can be observed on transparent as well as on metalized holographic foils. |
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