• Material: Vacuum-Grade Calcium Fluoride Substrate
• Uncoated
• Diameter: Ø1"
• Focal Length: -100 mm

This Calcium Fluoride (CaF₂) Plano-Concave Lenses, which offers high transmission from 0.18 - 8.0 µm, is uncoated. CaF₂ is commonly used for applications requiring high transmission in the infrared and ultraviolet spectral ranges. Its extremely high laser damage threshold makes it useful for use with excimer lasers. The material exhibits a low refractive index, varying from 1.35 to 1.51 within its usage range of 180 nm to 8.0 µm. Calcium fluoride is also fairly chemically inert and offers superior hardness compared to its barium fluoride, magnesium fluoride, and lithium fluoride cousins.

• Material: Vacuum-Grade Calcium Fluoride
• Wavelength Range: 0.18 - 8.0 µm
• AR Coating Range: 3 - 5 µm
• Reflectance over Coating Range (Avg.): <2.0%
• Diameter Tolerance: +0.00/-0.10
• Thickness Tolerance: ±0.1 mm
• Focal Length Tolerance: ±1%
• Surface Quality: 40-20 Scratch-Dig
• Surface Flatness (Plano Side): λ/2
• Spherical Surface Power (Concave Side): 3λ/2
• Surface Irregularity: λ/2
• Centration: ≤3 arcmin
• Clear Aperture: >90% of Diameter
• Design Wavelength: 588 nm
• Diameter: 25.4 mm
• f: -100.0 mm
• R: -43.4 mm
• Center Thickness t_c: 3.0 mm
• Edge Thickness t_e: 4.9 mm
• Back Focal Length f_b: -102.1 mm
• Suggested Mount: LMR1