东方德菲仪器:聚焦颗粒--三维表面测量
Focus variation is employed,inter alia,for high-resolution measurement of plastic topographies with varying reflection properties and steep flanks.By meas of an optical 3D measuring system based on focus variation the leather-like grain on films can now be measured.In this way the regularity of grain elements before and sfter lamination can be quantified.