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

QED Analysis Notebook 1