How to manufacture substrates and how to specify correctly their properties you can read here:
Production of substrates
Tolerances for substrates

Charactaristics and transmission curves are given for
Standard substrates

LASEROPTIC offers a wide range of substrate materials and sizes. Standards like plane windows, lenses or wedges are stored steadily for a fast reaction time. If you will not find the perfect one within our   
Stock substrates,
please ask us for a customized solution.

Substrate sizes