FDS5 by Hoya

Obsolete Unknown Environmentally Dangerous

FDS5 by Hoya is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.761804 and a Vd of 26.914901. 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) 1.761804
Abbe Number (Vd) 26.914901
Dispersion Formula Schott
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{2.98655 - 0.0125754\,\lambda^2 + 0.0334708\,\lambda^{-2} + 0.00366259\,\lambda^{-4} - 0.000333209\,\lambda^{-6} + 3.0706 \times 10^{-5}\,\lambda^{-8}}$$
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
D62-27 Corning 1.761802 26.90455
SF55 Schott 1.7618 26.950177
PBH25 Ohara 1.761797 27.107724
PBH25W Ohara 1.761797 27.107726
H-ZF12 CDGM 1.76182 26.607986
ZF12 CDGM 1.761822 26.555686
PBH14 Ohara 1.761819 26.553651
PBH14W Ohara 1.761819 26.553651
N-SF14 Schott 1.76182 26.53
SF14 Schott 1.76182 26.53
Similar Glasses (Hoya)
Glass Manufacturer nd Vd Compare
FD140 Hoya 1.76182 26.61
FD14 Hoya 1.761823 26.552048
E-FD4 Hoya 1.7552 27.53
E-FD4L Hoya 1.7552 27.53
FD4 Hoya 1.755199 27.530242
FD41 Hoya 1.750839 27.686615
FF8 Hoya 1.75211 25.05
E-FD13 Hoya 1.74077 27.76
FD13 Hoya 1.740774 27.764991
NBFD29 Hoya 1.77047 29.74
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