C97-55 by Corning

Standard Unknown Environmentally Friendly

C97-55 by Corning is a standard optical glass. It transmits from 0.28 to 1.80 µm with an nd of 1.697005 and a Vd of 55.409848. It has low thermal expansion (CTE of 5.3×10⁻⁶/K).

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) 1.697005
Abbe Number (Vd) 55.409848
Dispersion Formula Schott
Wavelength Range 0.28 — 1.8 µm
$$n(\lambda) = \sqrt{2.82618 - 0.013727\,\lambda^2 + 0.0199135\,\lambda^{-2} - 5.69018 \times 10^{-5}\,\lambda^{-4} + 5.60875 \times 10^{-5}\,\lambda^{-6} - 2.66032 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 5.3
TCE 100/300°C (10-6/K) 7.0
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) 3.62
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-LAK14 Schott 1.6968 55.41
LAKN14 Schott 1.6968 55.410215
LAC14 Hoya 1.6968 55.46
M-LAC14 Hoya 1.6968 55.46
H-LAK51A CDGM 1.6968 55.526357
LAL14 Ohara 1.696796 55.528037
S-LAL14 Ohara 1.696797 55.532241
MP-LAC14-80 Hoya 1.6976 55.51
LAK14 Sumita 1.6968 55.6
K-LaK14 Sumita 1.6968 55.6
Similar Glasses (Corning)
Glass Manufacturer nd Vd Compare
C97-56 Corning 1.697 56.222926
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
C90-50 Corning 1.689009 49.625392
D20-50 Corning 1.720003 50.312121
C51-56 Corning 1.651124 55.895803
D34-51 Corning 1.733513 51.387663
C58-51 Corning 1.658503 51.012014
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