C97-56 by Corning

Standard Unknown Environmentally Friendly

C97-56 by Corning is a standard optical glass. It transmits from 0.28 to 1.80 µm with an nd of 1.697 and a Vd of 56.222926.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.28–1.8 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.28–1.8 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.280–1.800 µm
Optical Properties
Refractive Index (nd) 1.697
Abbe Number (Vd) 56.222926
Dispersion Formula Schott
Wavelength Range 0.28 — 1.8 µm
$$n(\lambda) = \sqrt{2.82809 - 0.0143091\,\lambda^2 + 0.0189051\,\lambda^{-2} + 0.000170488\,\lambda^{-4} + 2.20931 \times 10^{-5}\,\lambda^{-6} - 9.54364 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) 7.2
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) 3.75
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
H-LAK12 CDGM 1.6968 56.175305
LAC15 Hoya 1.6968 56.114704
LAK31 Schott 1.696732 56.420174
K-LaFK55 Sumita 1.694 56.3
LAFK55 Sumita 1.694 56.3
K-LaK14 Sumita 1.6968 55.6
LAK14 Sumita 1.6968 55.6
S-LAL14 Ohara 1.696797 55.532241
LAL14 Ohara 1.696796 55.528037
H-LAK51A CDGM 1.6968 55.526357
Similar Glasses (Corning)
Glass Manufacturer nd Vd Compare
C97-55 Corning 1.697005 55.409848
C90-55 Corning 1.691008 54.793839
C78-56 Corning 1.678004 55.519168
D13-54 Corning 1.713 53.843096
C57-57 Corning 1.657503 57.198059
C51-56 Corning 1.651124 55.895803
C52-58 Corning 1.6516 58.511488
D20-50 Corning 1.720003 50.312121
C90-50 Corning 1.689009 49.625392
D34-51 Corning 1.733513 51.387663
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