In the actual measurement process, not all the workpieces measured by the imaging instrument are smooth, and some rough workpieces will be needed for measurement. Rough workpiece imaging may not be clear, and will also affect the measurement results from various aspects. Therefore, when measuring rough workpiece, the quadratic element imaging instrument needs to take corresponding methods to obtain accurate results. Here are three common measurements:
Impression method
Impression method refers to the workpiece before measurement using paraffin or some low melting point alloy and other impression materials, printed on the surface of the workpiece to be measured, and then placed into the secondary element imaging instrument under the microscope for measurement, although this method can be very good measurement results, but also has certain limitations, mainly suitable for large or heavy workpiece.
Method of interference
The light wave interference principle of the secondary element imager is used, and then the specific size measurement is carried out by using the interference microscope.
Light cutting method
Using the light cutting principle of the secondary element imager, and finally using the device’s double tube microscope for related measurements.
