[Raytrace] Optimization

[Richard F.L.R. Snashall]

Peter John Smith wrote:

>Richard,
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>>Adding a sixth wavelength to the second case (0.555, weight 1e-6),
>>making it the primary, regenerating the default merit function to
>>include the new wavelength, and reoptimizing changes the result by
>>about 0.002%, so it is not the Polychromatic Strehl reporting function.
>>(I had surmised this from cross-checking the results with the OSLO
>>Polychromatic Strehl reporting.
>>
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>Well, I thought it was a possibility but you now confirmed its not.
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>What weightings are you giving to the 0.482, 0.522, 0.571, 0.628, and 0.670
>?
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>Maybe by shifting all wavelengths up a bit the design is more tolerant which
>is a possibility.  Performance is usually harder to extend into the far blue
>than far red because of the more rapidly changing index at the blue end.
>
I probably did not explain this well enough.

Step 1 was to optimize the design using the built-in wavelengths.
     The Polychromatic Strehl was measured using both the measures
     provided in Zemax and OSLO.

Step 2a The wavelengths were shifted (same respective weights, though)
     and the designed was reoptimized for the new wavelengths.

Step 2b The wavelengths were shifted back to the built-in wavelengths,
     but without redoing optimization; just reverting back to the
     original measurement point.  The Polychromatic Strehl was measured
     again using both the measures.

The results:

     Although OSLO systematicly gave a slightly lower Strehl ratio
     than Zemax, both gave HIGHER Strehl Ratios in step 2b than
     in step 1.

   Rick S.

>
>Its the only thing I can think of.
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>Peter.
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