C72-32 by Corning

Standard Unknown Environmentally Friendly

C72-32 by Corning is a standard optical glass. It transmits from 0.32 to 1.80 µm with an nd of 1.672698 and a Vd of 32.31788. It has medium thermal expansion (CTE of 7.4×10⁻⁶/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) 1.672698
Abbe Number (Vd) 32.31788
Dispersion Formula Schott
Wavelength Range 0.32 — 1.8 µm
$$n(\lambda) = \sqrt{2.70791 - 0.00797797\,\lambda^2 + 0.029924\,\lambda^{-2} + 0.000527676\,\lambda^{-4} + 6.29139 \times 10^{-5}\,\lambda^{-6} + 1.84524 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.4
TCE 100/300°C (10-6/K) 8.3
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) 4.06
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
N-SF5 Schott 1.67271 32.25
SF5 Schott 1.6727 32.21
SF5 Sumita 1.6727 32.2
ZF2 CDGM 1.672707 32.180986
FD5 Hoya 1.672701 32.173263
H-ZF2 CDGM 1.6727 32.171186
E-FD5 Hoya 1.6727 32.17
PBM25 Ohara 1.6727 32.101636
S-TIM25 Ohara 1.6727 32.099206
SF19 Schott 1.6668 33.005581
Similar Glasses (Corning)
Glass Manufacturer nd Vd Compare
C67-33 Corning 1.666997 33.114648
C89-31 Corning 1.689004 31.210861
C48-34 Corning 1.647992 33.943274
C99-30 Corning 1.699002 30.107427
C97-36 Corning 1.695989 36.517325
C37-35 Corning 1.636493 35.322642
D17-29 Corning 1.717409 29.492751
C26-36 Corning 1.625903 35.60701
C51-39 Corning 1.650206 39.193419
C55-40 Corning 1.6555 40.115717
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