You can use UV-curing glue, for example Norland products as NOA-61 or similar is a good election.
As Jesús recommends, Norland optical adhesives https://www.norlandprod.com/adhesiveindex2.html
are a great choice for making optical-quality bonds between pieces of glass. They come in a variety of formulations for different applications.
Even regular epoxy can make a good strong bond, provided that you prepare it correctly. The key consideration is to eliminate microscopic air bubbles that get trapped in the glue during the mixing process and weaken the bond once the glue sets. You can degas epoxy in a bell jar with a modest vacuum pump. The process takes a few minutes, depending on the quality of the vacuum. Once the glue is degassed, it will make a fine optical-quality bond.
- Badges
- Science topic