D23-38 by Corning

Standard Unknown Environmentally Friendly

D23-38 by Corning is a standard optical glass. It transmits from 0.34 to 1.80 µm with an nd of 1.72349 and a Vd of 37.995089. It has medium thermal expansion (CTE of 6.8×10⁻⁶/K).

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.34–1.8 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.34–1.8 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.340–1.800 µm
Optical Properties
Refractive Index (nd) 1.72349
Abbe Number (Vd) 37.995089
Dispersion Formula Schott
Wavelength Range 0.34 — 1.8 µm
$$n(\lambda) = \sqrt{2.88687 - 0.00934061\,\lambda^2 + 0.027112\,\lambda^{-2} + 0.00108332\,\lambda^{-4} - 5.77453 \times 10^{-5}\,\lambda^{-6} + 7.86036 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.8
TCE 100/300°C (10-6/K) 7.8
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) 4.46
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
BASF8 Sumita 1.72342 38.0
BAFD8 Hoya 1.72342 37.99
H-ZBAF21 CDGM 1.72341 37.991564
BAH78 Ohara 1.723421 38.03427
S-BAH28 Ohara 1.72342 37.955602
BAH28 Ohara 1.72342 37.949115
BASF51 Schott 1.723728 38.111094
K-ZnSF8 Sumita 1.7143 38.9
ZNSF8 Sumita 1.7143 38.9
K-ZnSF8(M) Sumita 1.71143 38.9
Similar Glasses (Corning)
Glass Manufacturer nd Vd Compare
C97-36 Corning 1.695989 36.517325
D01-41 Corning 1.701805 41.110216
D44-45 Corning 1.744001 44.818533
C89-31 Corning 1.689004 31.210861
D17-29 Corning 1.717409 29.492751
C99-30 Corning 1.699002 30.107427
C72-32 Corning 1.672698 32.31788
C67-33 Corning 1.666997 33.114648
C55-40 Corning 1.6555 40.115717
D28-28 Corning 1.728304 28.397796
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