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Case Study – using
QED Analysis Notebooks
to evaluate an optic
against specifications
1. Introduction
Every optics manufacturer needs to analyze surface form against the tolerances on a drawing. Screenshots from the metrology analysis software are often employed, but they are not ideal for this purpose. QED's Analysis Notebooks automatically evaluate measurements against common optical specifications. A notebook summary page presents the pass/fail results in an attractive format.
Goal: Analyze a surface against optical specifications
- Compute key quality metrics from a measurement result
- Demonstrate conformance to specification in an attractive, easy to read report
Sounds easy enough. What are the challenges?
- While drawings are standardized, data presentation is not
- The “de-facto” standard is one or more screenshots from metrology software
- It is often not immediately obvious which numbers are the specifications, and how much they pass/fail by
- Screenshots are often not ideal for presentation
- But integrating into a report (e.g. via presentation software) is often labor intensive
- Multiple specifications can have different processing needs
- The analysis software may need different configuration settings for each spec
2. Example Work Flow
- Receive optical drawing / print and commit to fabrication
- Identify optical specifications to be evaluated
- Fabricate the optic!
- Obtain measurements of the optic suitable for evaluating against the optical specifications
- Compute specification metrics on the measurements
- Generate a quality report assessing conformance to specifications
- We demonstrate the last 2 steps in this case study
- We’ll take a sample optical drawing and form measurement, then evaluate against specifications and generate a QA report
3. Case Study Example: Optical Drawing
- We'll consider the surface form of the left (aspheric) surface
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