Sapphire

Where to begin

A hard crystalline substrate often considered for protective optical windows in demanding environments.

Design consideration

Account for birefringence and crystal orientation.

Confirm the finished optic

The spectral regions on this site are orientation notes, not guaranteed transmission ranges. Ask for the material grade, thickness and measured transmission curve; include the coating and operating temperature in your review.

Reference

Edmund Optics: common laser optics materials and infrared material selection.