C13-56 by Corning

Standard Unknown Environmentally Friendly

C13-56 by Corning is a standard optical glass. It transmits from 0.31 to 1.80 µm with an nd of 1.613498 and a Vd of 56.417725. It has low thermal expansion (CTE of 6.3×10⁻⁶/K).

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.31–1.8 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.31–1.8 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.310–1.800 µm
Optical Properties
Refractive Index (nd) 1.613498
Abbe Number (Vd) 56.417725
Dispersion Formula Schott
Wavelength Range 0.31 — 1.8 µm
$$n(\lambda) = \sqrt{2.55797 - 0.00871962\,\lambda^2 + 0.0162772\,\lambda^{-2} + 8.98168 \times 10^{-5}\,\lambda^{-4} + 2.37315 \times 10^{-5}\,\lambda^{-6} - 9.1064 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.3
TCE 100/300°C (10-6/K) 7.4
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.58
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
SK6 Schott 1.61375 56.397311
BACD6 Hoya 1.613753 56.377856
BSM6 Ohara 1.613749 56.365919
SK1 Sumita 1.61025 56.5
BACD1 Hoya 1.610248 56.650958
SK1 Schott 1.61025 56.712386
SK8 Schott 1.611171 55.917724
BACD8 Hoya 1.611168 55.774369
H-ZK5 CDGM 1.61117 55.772437
SK2 Schott 1.607381 56.650108
Similar Glasses (Corning)
Glass Manufacturer nd Vd Compare
C07-57 Corning 1.607504 56.610495
C23-57 Corning 1.622801 56.922436
C17-55 Corning 1.617605 55.123455
C23-58 Corning 1.623004 58.102071
C13-58 Corning 1.612693 58.570371
C09-59 Corning 1.608756 59.036803
C23-53 Corning 1.622502 53.14721
C39-56 Corning 1.638505 55.504447
C20-60 Corning 1.620406 60.332956
C42-58 Corning 1.642502 58.061633
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