Hi Christophe,

Thank you for the excellent tip. In the sequential mode, I was often told it is better to use a glass substitution template because the optimized model glasses you end up with are rarely readily available. Would you say this also applies to non-sequential, and if so, how would you decide what glass to buy based on the optimization result? Do you simply pick the catalog glass that is closer in terms of index and dispersion (assuming the cost is ok)? Lastly, does it make sense to port the glass substitution tool in non-sequential or is there something that prevent this from happening (the optimization scheme perhaps)?

Take care, and enjoy the winter break (if you have one),

David

Hi David,

Thanks for your useful comment. The context of the initial question was silicon materials. It seems that in this case, the user can get the material in the index he specifies (within reason). But, with glasses the substitution approach can prove more suitable.

It also give me the opportunity to elaborate a bit more on this use-case. To help the optimization remain within a reasonable index range, we can use the MCOG/MCOL operands to set boundaries, and MCOV to check the index if needed:

My turn then to wish you happy winter holidays !