520-294-5600 4dinfo@nanometrics.com

Getting the most from a 4D InSpec.

Application Notes

In the App Notes offered here, our experts research customer questions, and explain properties of measurements by 4D InSpec. They provide instructions on how to make a better measurement, and explain complex metrology issues, because we believe better understanding makes a better world.

Don’t see what you need? Contact us with your question! If it’s something a lot of people ask us, we may turn the answer into an App Note.

Learning How to Measure [Better]

Measurements of Various Defects and Their Replicas Using 4D InSpec

This paper looks at how to use 4D InSpec with replica pastes and gels. It answers the questions of whether 4D InSpec measurements of parts and measurements of replicas correlate. And it advises when to use a replica, and when to just go ahead and make the measurement directly.

Measuring Highly Reflective Curved Surfaces with the 4D InSpec

Curved, shiny or smooth surfaces can be challenging to measure. The curves create highlights that can saturate the imaging sensor, making areas of missing data. This app note explains why this is, and how to adjust your measurement technique to get the data you need.

Step Limitations of Fringe-Based Measurement Systems

People often ask us why there’s a step limitation with 4D InSpec. It’s because the gauge uses a method of calculating heights that’s like the topographical lines on a map.

In this app note, we explain how come fringe-based measurement systems can only handle steps of limited heights.

Measuring Transparent, Flat or Shiny Surfaces with the 4D InSpec

Transparent materials are measurable by the 4D InSpec, albeit with some limitations. This paper discusses how to measure defects on transparent material, and how a replica material to measure feature depths on transparent surfaces.

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