Dear all friends,
I am having a doubt in the following cases of coatings fabricate on 1) multi layer stack coated on flat glass substrate and cemented each other with another flat substrate , measured at 45 degrees incidence.2) multi layer stack coated on flat glass substrate and cemented with a right angle prism and measured 3) multi-layer coating is coated on right angle prism and cemented it with another right angle prism and measured.in all the above 3 cases how the reflectance and peak position will change ? Does the shape of the beam splitter will effect the reflectance?
Recently we have deposited a multilayer stack using materials like TiO2, HfO2 combination and TiO2, Y2O3 combination.both combination of stacks were deposited by electron beam evaporation technique at 200 degrees centigrade.what is the reason behind this….how the grain growth effects the coated film in the case of TiO2/Y2O3 combination.Does the Temperature of the coating is plays a role in the stress generation in the above material combination?
Hello every one,
I am Vemuri SRS Praveen Kumar working as Senior Project Fellow in CSIR-CSIO. Recently we have deposited a multilayer optical coatings on SK2 substrate with materials of Tio2 and HfO2 for the wavelength 650 nm in visible region using Electron beam evaporation technique.I have observed that the film after deposited on SK2 material, that the adhesion of the film is very very poor. we have notified that the coating is peeling continuously.can any one suggest what is the reason behind this……
Hi freinds, i want to measure the thin film multilayer coated sample for testing the laser induced damage threshold.
The substrate used is BK7 , kindly if any one knows how to measure. please send literature.
Dear friends, As we deposited multi layers coatings in the batch some times the crystal will failure, even if we keep the new crystal, some times it fails. what are the parameters and what precautions should take.
Through literature i have seen that omni-directional and angle insensitive filter were there.
but in these filters with change in angle, the peak is not shifted in either to left or right.
But the effect of sidelobes were increased. can any one suggest how to overcome these sidelobes in the above filter designs.