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

 

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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

  

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3. Case Study Example: Optical Drawing

• We'll consider the surface form of the left (aspheric) surface

 

 

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