All mirrors are controlled using laser-interferometers both during manufacturing and also again before final delivery.

Based on agreements with our customers we supply documentation in either paper (analog) forat or in digital format (pdf on CD, email Web etc.

Mirrors with multi-layer coatings such as Zero-Phase-Coatings or Phase-Retarders are measured and controlled for 100% accuracy using our own in-house, fully calibrated Ratiometer / Ellipsometer