they need to be optically clear, with a refractive index similar to the parts that they are sticking together. Depending on the application, optical adhesives can be single-component materials ...

Dymax low-stress, low-movement, light-curable optical adhesives cure in seconds to provide the strength and clarity of epoxies. Optically clear, high-tensile-strength bonds of 3,000 psi and shrinkage ...

It was tested by LIGO for specific low outgassing rates, vacuum serviceability and is currently used in cutting edge optical assemblies involving ... and is easily applied as an adhesive, coating or ...