Filmetrics has launched the most complete online public database of refractive index values available to the PV industry to date. The data will be used to help with thin-film thickness measurements, while the website will also offer a free refractive index calculation service.
The new database and measurement service has proved popular not just for solar firms, but also amongst those in the semiconductor, display and biomedical industries. “The first full week our database was online it averaged over 200 visitors a day. This demonstrates the large number of people requiring this information to perform their job,” said Filmetrics president Dr. Scott Chalmers.
Without accurate refractive index values, optical-based thickness measurements are inaccurate, and Filmetrics instruments determine film thickness by illuminating the film with white light and measuring the spectrum reflected off of the film. Once the spectrum is collected, the Filmetrics software analyses it to determine thickness, optical constants, and other user-selectable parameters.