F1 by Sumita

Obsolete Very Rare Environmentally Dangerous

F1 by Sumita is an obsolete optical glass with a very rare melt frequency. It transmits from 0.31 to 2.00 µm with an nd of 1.62588 and a Vd of 35.6. It has excellent chemical resistance and dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.27–2.0 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.27–2.0 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.310–2.000 µm
Optical Properties
Refractive Index (nd) 1.62588
Abbe Number (Vd) 35.6
Dispersion Formula Schott
Wavelength Range 0.27 — 2.0 µm
$$n(\lambda) = \sqrt{2.57128 - 0.00856333\,\lambda^2 + 0.0237824\,\lambda^{-2} + 0.000700397\,\lambda^{-4} + 7.98682 \times 10^{-6}\,\lambda^{-6} + 2.98471 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) 10.2
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.65
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance 1
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
C26-36 Corning 1.625903 35.60701
F7 Hoya 1.625363 35.583498
F7 Schott 1.625361 35.561194
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
H-F6 CDGM 1.62495 35.585173
F6 CDGM 1.624954 35.577816
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
F2 Sumita 1.62004 36.3
F6 Sumita 1.63636 35.4
F4 Sumita 1.61659 36.6
SF7 Sumita 1.6398 34.6
F3 Sumita 1.61293 36.9
F9 Sumita 1.62045 38.0
SF2 Sumita 1.64769 33.9
BASF1 Sumita 1.62606 39.1
SF12 Sumita 1.64831 33.8
K-PG395(M) Sumita 1.65296 36.8
Compare Glasses
    Compare Selected