E-FD5 by Hoya

Standard Rare Environmentally Friendly

E-FD5 by Hoya is a standard optical glass with a rare melt frequency. It transmits from 0.36 to 1.55 µm with an nd of 1.6727 and a Vd of 32.17. It has medium thermal expansion (CTE of 8.9×10⁻⁶/K) and excellent chemical resistance.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.36501–1.5296 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.36501–1.5296 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.360–1.550 µm
Optical Properties
Refractive Index (nd) 1.6727
Abbe Number (Vd) 32.17
Dispersion Formula Schott
Wavelength Range 0.36501 — 1.5296 µm
$$n(\lambda) = \sqrt{2.71358 - 0.0114197\,\lambda^2 + 0.0261337\,\lambda^{-2} + 0.00175765\,\lambda^{-4} - 0.000133077\,\lambda^{-6} + 1.52034 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.9
TCE 100/300°C (10-6/K) 10.9
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-1.84917 \times 10^{-7} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 23\,°\text{C}$$
Physical Properties
Density (g/cm³) 2.9
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance 1
Acid Resistance 1
Alkali Resistance —
Phosphate Resistance —
Notes

General glass Type

Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
H-ZF2 CDGM 1.6727 32.171186
ZF2 CDGM 1.672707 32.180986
SF5 Sumita 1.6727 32.2
SF5 Schott 1.6727 32.21
PBM25 Ohara 1.6727 32.101636
S-TIM25 Ohara 1.6727 32.099206
N-SF5 Schott 1.67271 32.25
C72-32 Corning 1.672698 32.31788
SF19 Schott 1.6668 33.005581
PBM39 Ohara 1.666799 33.046816
Similar Glasses (Hoya)
Glass Manufacturer nd Vd Compare
FD5 Hoya 1.672701 32.173263
FD19 Hoya 1.666797 33.059707
MC-FD80 Hoya 1.68893 31.16
E-FD8 Hoya 1.68893 31.16
MP-FD80 Hoya 1.68893 31.16
M-FD80 Hoya 1.68893 31.16
FD8 Hoya 1.688931 31.158857
E-FD80 Hoya 1.6896 31.14
FD9 Hoya 1.654462 33.717017
FD12 Hoya 1.648308 33.793909
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