Scan through an AR-coated object: responses of coatings and substrate in one plot. The bulk absorption calibration is used for the plot. To get absorption in the coatings surface calibration should be applied to AR-coatings spikes.
Mapped surface of an optical part reveals the pattern of absorbing defects.
Time dependence of absorption:
- recording started at some point in space,
- after 20 s object moved by 0.1 mm to a fresh point,
- recording continued to reveal the time-dependent absorption response.
