D62-27 by Corning

Standard Unknown Environmentally Friendly

D62-27 by Corning is a standard optical glass. It transmits from 0.36 to 1.80 µm with an nd of 1.761802 and a Vd of 26.90455. It has medium thermal expansion (CTE of 7.4×10⁻⁶/K).

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.36–1.8 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.36–1.8 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.360–1.800 µm
Optical Properties
Refractive Index (nd) 1.761802
Abbe Number (Vd) 26.90455
Dispersion Formula Schott
Wavelength Range 0.36 — 1.8 µm
$$n(\lambda) = \sqrt{2.98155 - 0.0105293\,\lambda^2 + 0.0369515\,\lambda^{-2} + 0.0026283\,\lambda^{-4} - 0.000194603\,\lambda^{-6} + 2.37257 \times 10^{-5}\,\lambda^{-8}}$$
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) 4.8
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
FDS5 Hoya 1.761804 26.914901
SF55 Schott 1.7618 26.950177
PBH25 Ohara 1.761797 27.107724
PBH25W Ohara 1.761797 27.107726
FD140 Hoya 1.76182 26.61
H-ZF12 CDGM 1.76182 26.607986
ZF12 CDGM 1.761822 26.555686
PBH14W Ohara 1.761819 26.553651
PBH14 Ohara 1.761819 26.553651
FD14 Hoya 1.761823 26.552048
Similar Glasses (Corning)
Glass Manufacturer nd Vd Compare
D56-27 Corning 1.755203 27.591377
D40-28 Corning 1.740001 28.102623
D85-26 Corning 1.784994 25.902085
D85-25 Corning 1.784752 25.799504
D34-26 Corning 1.73402 26.500794
D28-28 Corning 1.728304 28.397796
E05-25 Corning 1.805093 25.506125
D17-29 Corning 1.717409 29.492751
C99-30 Corning 1.699002 30.107427
E37-30 Corning 1.836406 30.205692
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