C51-56 by Corning

Standard Unknown Environmentally Friendly

C51-56 by Corning is a standard optical glass. It transmits from 0.32 to 1.80 µm with an nd of 1.651124 and a Vd of 55.895803. It has medium thermal expansion (CTE of 6.7×10⁻⁶/K).

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.32–1.8 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.32–1.8 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.320–1.800 µm
Optical Properties
Refractive Index (nd) 1.651124
Abbe Number (Vd) 55.895803
Dispersion Formula Schott
Wavelength Range 0.32 — 1.8 µm
$$n(\lambda) = \sqrt{2.67812 - 0.0112163\,\lambda^2 + 0.0171068\,\lambda^{-2} + 0.000280365\,\lambda^{-4} + 1.76902 \times 10^{-6}\,\lambda^{-6} + 1.81331 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.7
TCE 100/300°C (10-6/K) 7.3
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) 3.72
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
LAKN22 Schott 1.65113 55.891754
H-LAK10 CDGM 1.65113 55.890872
N-LAK22 Schott 1.65113 55.89
K-LaKn5 Sumita 1.65 55.8
LAKN5 Sumita 1.65 55.8
LACL2 Hoya 1.650201 55.737216
LAL54 Ohara 1.650996 56.154774
S-LAL54 Ohara 1.650996 56.163717
S-LAL54Q Ohara 1.651 56.238379
LAKN13 Sumita 1.641 56.8
Similar Glasses (Corning)
Glass Manufacturer nd Vd Compare
C57-57 Corning 1.657503 57.198059
C39-56 Corning 1.638505 55.504447
C42-58 Corning 1.642502 58.061633
C52-58 Corning 1.6516 58.511488
C78-56 Corning 1.678004 55.519168
C23-57 Corning 1.622801 56.922436
C23-58 Corning 1.623004 58.102071
C41-60 Corning 1.640495 60.130957
C17-55 Corning 1.617605 55.123455
C23-53 Corning 1.622502 53.14721
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