E-FD13 by Hoya

Standard Rare Environmentally Friendly

E-FD13 by Hoya is a standard optical glass with a rare melt frequency. It transmits from 0.37 to 1.55 µm with an nd of 1.74077 and a Vd of 27.76. It has medium thermal expansion (CTE of 9.1×10⁻⁶/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: 0.370–1.550 µm
Optical Properties
Refractive Index (nd) 1.74077
Abbe Number (Vd) 27.76
Dispersion Formula Schott
Wavelength Range 0.36501 — 1.5296 µm
$$n(\lambda) = \sqrt{2.92059 - 0.0136816\,\lambda^2 + 0.0325678\,\lambda^{-2} + 0.00287255\,\lambda^{-4} - 0.000242771\,\lambda^{-6} + 2.66145 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 9.1
TCE 100/300°C (10-6/K) 11.0
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-3.40517 \times 10^{-7} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 23\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.11
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-ZF50 CDGM 1.74077 27.760063
ZF50 CDGM 1.74077 27.76788
S-TIH13 Ohara 1.740769 27.789359
PBH13W Ohara 1.740769 27.793228
PBH13 Ohara 1.740769 27.793228
SF13 Sumita 1.74077 27.7
SF13 Schott 1.740771 27.59998
SF54 Schott 1.7408 28.090813
D40-28 Corning 1.740001 28.102623
SF3 Schott 1.74 28.2
Similar Glasses (Hoya)
Glass Manufacturer nd Vd Compare
FD13 Hoya 1.740774 27.764991
FD3 Hoya 1.739999 28.245048
FD41 Hoya 1.750839 27.686615
FD10 Hoya 1.728252 28.319563
E-FD10L Hoya 1.72825 28.32
E-FD10 Hoya 1.72825 28.32
FDS2 Hoya 1.7283 28.674457
FD4 Hoya 1.755199 27.530242
E-FD4 Hoya 1.7552 27.53
E-FD4L Hoya 1.7552 27.53
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