M-FDS910 by Hoya

Preferred Common Precision Molding Environmentally Friendly

M-FDS910 by Hoya is a preferred optical glass with a common melt frequency. It transmits from 0.37 to 2.50 µm with an nd of 1.82115 and a Vd of 24.06. It has medium thermal expansion (CTE of 9.5×10⁻⁶/K), excellent chemical resistance, and precision molding compatibility.

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: 0.370–2.500 µm
Optical Properties
Refractive Index (nd) 1.82115
Abbe Number (Vd) 24.06
Dispersion Formula Schott
Wavelength Range 0.36501 — 1.5296 µm
$$n(\lambda) = \sqrt{3.16599 - 0.013492\,\lambda^2 + 0.0464992\,\lambda^{-2} + 0.00247141\,\lambda^{-4} - 8.6596 \times 10^{-5}\,\lambda^{-6} + 2.72593 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 9.5
TCE 100/300°C (10-6/K) 12.1
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-5.47 \times 10^{-6} + 2(5.77 \times 10^{-9})\,\Delta T + 3(-3.7 \times 10^{-11})\,\Delta T^2 + \frac{9.25 \times 10^{-7} + 2(1.02 \times 10^{-9})\,\Delta T}{\lambda - 1.26 \times 10^{-9}}\right] \Delta T = T - T_0, \quad T_0 = 23\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.69
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

Glass for molded optics lens

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Glass Manufacturer nd Vd Compare
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Similar Glasses (Hoya)
Glass Manufacturer nd Vd Compare
MC-FDS910-50 Hoya 1.82165 24.04
MP-FDS910-50 Hoya 1.82165 24.04
FD225 Hoya 1.80809 22.76
FD60-W Hoya 1.80518 25.46
FD60 Hoya 1.80518 25.46
FD6 Hoya 1.805184 25.465194
NBFD26 Hoya 1.83401 25.97
FDS90-SGP Hoya 1.84666 23.84
FDS9 Hoya 1.846658 23.826345
FDS90-SG Hoya 1.84666 23.78
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