High quality Calcium Fluoride

04 Jan 2011

Hellma Materials calcium fluoride crystals, grown from high purity raw materials complete the application range of optical materials from deep UV to IR with highest transmission ranging from 130nm to 9µm.

Hellma Materials offers high quality calcium fluoride components and blanks with different crystal orientations (<111>, <100>, random or others) in the following specifications:

• Size: diameter up to 350 mm
• Thickness up to 150 mm
• Highest refractive index homogeneity (<0.5 ppm)
• Lowest stress birefringence (<0.5 nm / cm)
• Highest accuracy in crystal orientation (<0.5 °)
• Highest Transmission >99.7% (at 193 nm, d=10 mm)
• Highest Laser damage threshold
• Lowest fluorescence
• Lowest stray light
• Minimum structural defects