Synopsys OSG ( formerly Optical Research Associates ) have recently developed a CODE V® feature called 'Glass
Expert'. Taking advantage of modern computing power, this program extends the normal optimisation methods by
allowing a large number of glass types to be substituted into a lens system in an automatic way .
We evaluated this software, applying it to a small number of suitable lens systems . We wanted to discover how quickly
it runs, how the user input choice affects the end-result , and at what point of the design process it is most valuable .
The exercise proved to be very interesting. We describe how, in one case of a highly colour-corrected visible system, the
macro was able to reproduce, within a couple of hours , most of the glass choices I discovered over a period of a couple
of weeks in the original design process.
While this macro is obviously useful for specially-corrected visible systems, it is also potentially useful for mid-wave IR
and the important short-wave IR ( SWIR ) band. An example of re-optimisation of a NIR/SWIR –band lens is given .
‘Glass Expert’ also offers the interesting possibility of swapping air and glass materials in an automatic way. We tried
this option on one example, but ran into some problems that require further thinking .
Some other pitfalls, and potential future improvements in the software are mentioned. We also describe how ‘Glass
Expert’ and Global Synthesis® can work very effectively in combination .