FD19 by Hoya

Obsolete Unknown Environmentally Dangerous

FD19 by Hoya is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.666797 and a Vd of 33.059707. It has dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.334–2.325 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.334–2.325 µm
Abbe Number Calculator
Transmission vs Wavelength

No transmission data available.

Transmission Calculator
Valid wavelength range: 0.334–2.325 µm
Optical Properties
Refractive Index (nd) 1.666797
Abbe Number (Vd) 33.059707
Dispersion Formula Schott
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{2.69702 - 0.010235\,\lambda^2 + 0.0247234\,\lambda^{-2} + 0.00184241\,\lambda^{-4} - 0.000130726\,\lambda^{-6} + 1.17195 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) —
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) —
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
S-TIM39 Ohara 1.6668 33.054985
H-ZF39 CDGM 1.6668 33.053728
PBM39 Ohara 1.666799 33.046816
SF19 Sumita 1.6668 33.1
SF19 Schott 1.6668 33.005581
N-SF19 Schott 1.66679 33.12
C67-33 Corning 1.666997 33.114648
C72-32 Corning 1.672698 32.31788
N-SF5 Schott 1.67271 32.25
SF5 Schott 1.6727 32.21
Similar Glasses (Hoya)
Glass Manufacturer nd Vd Compare
FD5 Hoya 1.672701 32.173263
E-FD5 Hoya 1.6727 32.17
FD9 Hoya 1.654462 33.717017
FD12 Hoya 1.648308 33.793909
FD2 Hoya 1.647693 33.836872
E-FD2 Hoya 1.64769 33.84
BAFD2 Hoya 1.664457 35.887705
MP-FD80 Hoya 1.68893 31.16
MC-FD80 Hoya 1.68893 31.16
E-FD8 Hoya 1.68893 31.16
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