Dear Nicolas,

1/ Optical glue have been used in some cases for similar purposes. You can find air- or UV-curable ones, with a large range of optical index and mechanical properties. Check Norland optical adhesive for instance (link below) used in the attached publications. From what I understood from your question the application in the publications may not be exactly what you want to do, but they show that some of the glues are biocompatible.

2/ Minor comment, but you must be aware that the thickness of the object you plan to create is very important too.

3/ Try to rephrase the last sentences of your request, to get more answers try to be clearer.

I hope this helps.

https://www.norlandprod.com/adhesiveindex2.html#noa

Article Microfluidic stickers

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Dear Pierre,

thank you for your answer. I yet haven't got to fully read the papers you attached.

But after reading through my post again, I recognized the last paragraph indeed was quite unclear. I changed it.

thanks, Nicolas

You can use imaging ellipsometry as well to characterize these kind of samples.

Best regards

Christian

Yes, once the process of generating the components is done, this could be a good technique - thanks Christian

Best regards,

Nicolas