F7 by Hoya

Obsolete Unknown Environmentally Dangerous

F7 by Hoya is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.625363 and a Vd of 35.583498. 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) 1.625363
Abbe Number (Vd) 35.583498
Dispersion Formula Schott
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{2.57277 - 0.00976368\,\lambda^2 + 0.0213707\,\lambda^{-2} + 0.0014741\,\lambda^{-4} - 0.000102902\,\lambda^{-6} + 8.95657 \times 10^{-6}\,\lambda^{-8}}$$
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
F7 Schott 1.625361 35.561194
F6 CDGM 1.624954 35.577816
H-F6 CDGM 1.62495 35.585173
F1 Sumita 1.62588 35.6
C26-36 Corning 1.625903 35.60701
H-F13 CDGM 1.62588 35.698971
S-TIM1 Ohara 1.625882 35.699614
F1 Schott 1.625882 35.700495
PBM1 Ohara 1.625882 35.700668
F13 CDGM 1.625884 35.713679
Similar Glasses (Hoya)
Glass Manufacturer nd Vd Compare
E-F1 Hoya 1.62588 35.74
F1 Hoya 1.62588 35.744525
F11 Hoya 1.620962 35.947308
E-F2 Hoya 1.62004 36.3
F2 Hoya 1.62004 36.303385
F6 Hoya 1.636356 35.340304
F4 Hoya 1.616589 36.615561
E-F3 Hoya 1.61293 36.96
F3 Hoya 1.612929 36.964515
E-FD7 Hoya 1.6398 34.57
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