• alpha-BBO
  • Calcite
  • Cr4+YAG
  • Fluoride
  • Sapphire
  • TeO2
  • TGG
  • YAG
  • YVO4
  • Calcite

    Calcite(CaCO3) is the only natural mineral among our crystals. Because of its high birefringence, wide spectral transmission and availability in large size, Calcite is a traditional and still ideal material for visible and near IR polarizing applications. 

    Transparency Range: 300-3000nm

    Density:2.71 gram/cm3

    Mohshardness: 2

    Low susceptibility to moisture

    Thermal Expansion Coef.: //c 26.31, c 5.44 (x10-6/K)

    Refractive Indices, Birefringence(Δn=no-ne)& Walk-off Angle @ 45o(ρ):
    @630nm ne=1.4852, no=1.6557, Δn=0.1705, ρ=6.2°

    @1300nm ne=1.4885, no=1.6629, Δn=0.1744, ρ=6.32°

    Sellmeier Equation(λ in μm):


    Features and Standard Specifications from LNG Optics:

    Orientation accuracy: ±0.5o

    Dimension Tolerance: ±0.2mm

    Surface quality: 20/10 Scratch/Dig

    Flatness: λ/4 @ 633nm

    Transmitted Wavefront Distortion: λ/4 @ 633nm

    Parallelism: 30 arc seconds

    Wedged angles accuracy: 3 arc minutes

    Perpendicularity: 5 arc minutes

    AR Coatings: single band, broadband