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- How to use TEZI to Tolerance for Manufacturing-Related Surface Sag Error
How to use TEZI to Tolerance for Manufacturing-Related Surface Sag Error
- By Nam-Hyong Kim
- Published 30 November 2005
- Surface Tolerances
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Summary and References
This article has demonstrated the use of the TEZI operand for surface irregularity tolerance. In summary:
- Monte Carlo tolerancing should be used for manufacturing-related surface irregularity tolerance
- The spatial frequency of the irregularity as well as its RMS amplitude must be modelled
References
1. Optical System Design, R. E. Fischer and B. Tadic-Galeb, McGraw-Hill, ISBN0-07-134916-2, Chapter 16
Attachments
3 Responses to "How to use TEZI to Tolerance for Manufacturing-Related Surface Sag Error" 
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said this on 01 Dec 2005 5:48:57 AM PDT
It is easy to understand.
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said this on 05 Dec 2005 11:13:41 AM PDT
This topic reminds me of a talk I heard recently about tolerancing on power spectral density or PSD (Youngworth SPIE 2005). PSD might possibly be implemented as some sort of weighting function on the Zernikes. It's not immediately clear to me however if the range of total spatial frequencies captured by Zernike polynomials is large enough to warrent implementing PSD tolerancing. I suppose if you used a hundred or so Zernike terms it may make more sense. Has anyone out there implemented PSD tolerancing in ZEMAX
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said this on 05 Dec 2005 11:15:40 AM PDT
Question: When tolerancing using TEZI do you need to increase the number of Monte Carlo runs to account for the additional Zernike veriables to achieve the same level of confidence in the statistics
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