TAC1 by Hoya

Obsolete Unknown Environmentally Dangerous

TAC1 by Hoya is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.725999 and a Vd of 53.41758. 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) 1.725999
Abbe Number (Vd) 53.41758
Dispersion Formula Schott
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{2.91328 - 0.010181\,\lambda^2 + 0.0253896\,\lambda^{-2} - 0.00088235\,\lambda^{-4} + 0.000148494\,\lambda^{-6} - 6.26136 \times 10^{-6}\,\lambda^{-8}}$$
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
LAL60 Ohara 1.725999 53.565698
S-LAL60 Ohara 1.725999 53.565698
D-LAK52-25 CDGM 1.72924 53.851219
S-LAL19 Ohara 1.72916 54.095223
D-LAK52 CDGM 1.7305 53.944268
N-LAK34 Schott 1.72916 54.5
S-LAL18 Ohara 1.729157 54.680013
LAL18 Ohara 1.729157 54.683134
H-LAK52 CDGM 1.72916 54.684737
LAK18 Sumita 1.72916 54.7
Similar Glasses (Hoya)
Glass Manufacturer nd Vd Compare
M-TAC80 Hoya 1.72903 54.04
MP-TAC80-60 Hoya 1.72963 54.07
TAC8P Hoya 1.72916 54.54
TAC8 Hoya 1.72916 54.67
MP-LAC8-30 Hoya 1.7133 53.95
M-LAC8 Hoya 1.713 53.94
LAC8 Hoya 1.713 53.94
TAC2 Hoya 1.741 52.61
TAC4 Hoya 1.734 51.05
LAC10 Hoya 1.72 50.35
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