Optical mount with UV curable adhesive and protective coating

摘要

In an assembly of a holder or a mounting (2) and an UV transmissive transparent component (1) bonded by an UV curable adhesive (31), the adhesive region of the component (1) has a thin film (41, 42) which (i) transmits UV light in the spectral region used for adhesive curing and reflects and/or absorbs UV light in the functional spectral region transmitted by the component (1); or (ii) exhibits more than 60% transmission at the Hg-I line and less than 5 (preferably less than 2)% transmission at below 250 nm wavelength. Preferably, the thin film (41, 42) consists of tantalum pentoxide, hafnium dioxide, titanium dioxide, zinc sulphide, cerium fluoride, cryolite and/or magnesium fluoride and the component (1) consists of quartz glass, calcium fluoride or germanium dioxide. Also claimed is production of the above assembly in which the thin film (41, 42) is applied preferably by vapour deposition or sputtering with or without ion assistance or by PVD or CVD.