Telemark Low Pressure Ion Sources consistently produce the highest index TiO2 films at ambient temperatures
Telemark research lab continues to test materials using the Telemark Low Pressure Ion Sources.
TiO2 is a very popular material for interference coatings and is used heavily across our industry. The ability to push the index of TiO2 up should be the goal of all coating operations using this material. Increasing the index affords; less layers to achieve better film properties, faster turn times for high layer ... Continue Reading →
Unfortunately there is no guarantee for eliminated “secondary electron“ penetration of substrate. This is caused by simple physics. However Telemark has developed ways to significantly reduce electron damage by design of the Telemark electron beam source.
Click here for pdf – telemark_secondary_electron_app_note_6-26-15.pdf Continue Reading →
The historical method of calling an end of a layer in optical coating was to monitor a wavelength and when a condition was met calling the end of the layer. In the earliest days this method was done using the human eye of a trained observer. In some cases this is still done today but with the most limited of success. The next advent in coating control came with the advent of the ability to measure automatically the intensity of ... Continue Reading →
The historical method of calling an end of a layer in optical coating was to monitor a wavelength and when a condition was met calling the end of the layer. As discussed in a previous application note the NVision optical monitor supports this method with good success. There is one problem with this technology; the measurement of only one wavelength limits the potential precision as we are typically waiting until a condition has been exceeded such as a quarter wave minima or ... Continue Reading →