Require measurement of lens lines (as shown below)

Since the object is transparent and light can penetrate directly, it is only necessary to use a single-axis platform for contour scanning measurement. The D40A48 and H4UY single-channel controller are adopted for this measurement. The D40A48 has small light spot, good resolution and measurement accuracy, and the measurement Angle of the D40A48 lens is ±48°, which can largely meet the application of large Angle.

(Contour scan data)

The light blue area on the left and right sides of the above figure is the platform base plane, which is used as a horizontal line, and the yellow area is the target area. It can be seen that the value of the minimum height is a negative value less than 0. When observing the waveform diagram, it is found that there is no sensitivity and no wave peak at the concave surface, indicating that there is no light return here.