Michelsons, VIPAs, etalons, gratings, polarizing, non-polarizing, field widened, single mode, cemented, optically contacted (epoxy free bonded), hexagonal, square, small (1mm), large (45mm), UV, visible, IR.   Material selection, camera selection,   software, coating design, modeling of phase & polarization, mechanical design, process development, quality planning, glass shaping and polishing, optical contacting, cementing and finally testing, testing and testing.   We have made a lot variants but the possibilities and unique requirements are endless, of course that's what makes it so interesting and challenging to work on these projects.

If you have a need for a custom spectrometer do not hesitate to douna@femto-oe.com to discuss the various parameters and trade-offs.   Free advice is our specialty.