This listing is for the sale of one (1) replacement window with the following characteristics:

• Material: Calcium Fluoride (CaF₂).
• Dimensions: 1" (25.4 mm) OD, 0.197" (5 mm) Thickness.
• 0.5° Wedge Between Transmitting Surfaces.
• Surface Flatness: λ/16 Over Central 10 mm, λ/8 Over Entire Clear Aperture.

These windows are suitable for UV, visible, and IR laser applications. The 0.5° wedge helps prevent unwanted etalon effects, fringe patterns, and cavity feedback. The high surface flatness prevents beam distortion. These windows are uncoated for use over their entire optical range. These windows are compatible with Ideal Vacuum's glass gas cells, Habanero reference cell furnace (up to 600-1000 °C depending on humidity), and Serrano reference cell heater.

Calcium Fluoride (CaF₂) Properties

Optical Transmission Range: 0.13 to 10µm Refractive Index: 1.399 at 5µm Reflection Loss: 5.4% at 5µm Absorption Coef.: 7.8 x 10-4 cm-1 at 2.7 µm Reststrahlen Peak: 35 µm

Chemical behavior of polished surfaces Climatic resistance class CR 1 (ISO/WD 13384) Acid resistance class SR 4.5 (ISO 8424) Alkali resistance class AR 2.3 (ISO 10629) Phosphate resistance class PR 1.3 (ISO 9689) Stain resistance class FR 0 Solubility: 0.0017g/100g water at 20°C (Do not immerse in water.) Maximum operating temperature 600 °C (Wet or Humid), 1000 °C (Dry)