The new version of PhotonSoft program features advanced capability to conduct group measurements of single and multiple substrates. Such function is of great value when determination of optimum angle of incidence for maximum optical performance is required.
Measurement of a polariser using a sequence of 5 consecutive measurements of transmittance and reflectance. All of them are shown within one screen.
Example 1. Thin film polariser
The thin film polarisers are often used to separate polarisation of incoming beam, e.g. laser beam. For appropriate operation of polariser, the light beam shall incident the surface at the Brewster angle (e.g., about 56 degrees to the normal position for BK7 glass). One of the important characteristics of thin-film polariser is the ratio of intensities of the transmitted p-polarised radiation to the transmitted s-polarised radiation - Tp / Ts. The higher the ratio, the better the polariser. In practice, one must set the angle of incidence accurately in order to determine this characteristic by adjusting the angle from about 53 to 59 degrees. Such multiple measurements can be easily carried out unattended even with a 0.1 degree step using the Photon RT spectrophotometer. All measurement results will be instantly saved as Excel files for further analysis. Using the measured data, one can knowingly determine not only the optimum angle of incidence, but also the range of angles and wavelength ranges corresponding to the best performance characteristics of polarizer. To an even greater extent, this great feature will be useful to analyse broadband polarizers.
Example 2. High-reflectivity mirrors
This group of optical elements shall demonstrate maximum reflectance within a pre-determined wavelength range. For example, a typical requirement would specify reflectance (Rs, Rp) greater than 99,9% for 975-1175 nm at 45 degrees angle of incidence. For more demanding mirrors, an additional requirement would address not only a particular angle of incidence, but a range of angles, e.g. 40-50 degrees, or 0-45 degrees. Such measurements can be successfully performed with PHOTON RT spectrophotometer and would require just 15-30 minutes to complete. No involvement of optical engineer is required, all measurements are performed unattended, so the user can invest their time in other projects or activities.
These examples show new possibilities for measurements of optical components with PHOTON RT universal scanning spectrophotometer ensuring accurate, fast and time-efficient results.
If you have further questions please contact our Metrology team on 01582 764334 or click to email.
Measurement of a polariser using a sequence of 5 consecutive measurements of transmittance and reflectance. All of them are shown within one screen.
Example 1. Thin film polariser
The thin film polarisers are often used to separate polarisation of incoming beam, e.g. laser beam. For appropriate operation of polariser, the light beam shall incident the surface at the Brewster angle (e.g., about 56 degrees to the normal position for BK7 glass). One of the important characteristics of thin-film polariser is the ratio of intensities of the transmitted p-polarised radiation to the transmitted s-polarised radiation - Tp / Ts. The higher the ratio, the better the polariser. In practice, one must set the angle of incidence accurately in order to determine this characteristic by adjusting the angle from about 53 to 59 degrees. Such multiple measurements can be easily carried out unattended even with a 0.1 degree step using the Photon RT spectrophotometer. All measurement results will be instantly saved as Excel files for further analysis. Using the measured data, one can knowingly determine not only the optimum angle of incidence, but also the range of angles and wavelength ranges corresponding to the best performance characteristics of polarizer. To an even greater extent, this great feature will be useful to analyse broadband polarizers.
Example 2. High-reflectivity mirrors
This group of optical elements shall demonstrate maximum reflectance within a pre-determined wavelength range. For example, a typical requirement would specify reflectance (Rs, Rp) greater than 99,9% for 975-1175 nm at 45 degrees angle of incidence. For more demanding mirrors, an additional requirement would address not only a particular angle of incidence, but a range of angles, e.g. 40-50 degrees, or 0-45 degrees. Such measurements can be successfully performed with PHOTON RT spectrophotometer and would require just 15-30 minutes to complete. No involvement of optical engineer is required, all measurements are performed unattended, so the user can invest their time in other projects or activities.
These examples show new possibilities for measurements of optical components with PHOTON RT universal scanning spectrophotometer ensuring accurate, fast and time-efficient results.
If you have further questions please contact our Metrology team on 01582 764334 or click to email.