D-ZLAF85LS-25 by CDGM

Standard Rare Precision Molding Environmentally Friendly

D-ZLAF85LS-25 by CDGM is a standard optical glass with a rare melt frequency. It transmits from 0.34 to 2.40 µm with an nd of 1.85344 and a Vd of 40.557917. It has low thermal expansion (CTE of 6.3×10⁻⁶/K), very high relative cost, and precision molding compatibility.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.365–2.325 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.365–2.325 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.340–2.400 µm
Optical Properties
Refractive Index (nd) 1.85344
Abbe Number (Vd) 40.557917
Dispersion Formula Sellmeier
Wavelength Range 0.365 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{1.70153\,\lambda^2}{\lambda^2 - 0.00796296} + \frac{0.633298\,\lambda^2}{\lambda^2 - 0.03201} + \frac{1.43192\,\lambda^2}{\lambda^2 - 110.679}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.3
TCE 100/300°C (10-6/K) 8.1
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) 5.29
Relative Cost 37.1
Mechanical Properties
Young's Modulus (GPa) 120.77
Poisson's Ratio 0.306
Knoop Hardness (kgf/mm²) 648.0
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Notes

anneal rate:25℃/h

Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
K-VC185 Sumita 1.85375 40.6
L-LAH85 Ohara 1.854 40.393284
L-LAH85V Ohara 1.854 40.378368
S-LAH89 Ohara 1.8515 40.782269
MP-TAFD305 Hoya 1.85135 40.1
M-TAFD305 Hoya 1.85135 40.1
MC-TAFD305 Hoya 1.85135 40.1
MC-TAFD315 Hoya 1.85135 40.07
M-TAFD315 Hoya 1.85135 40.07
K-VC185(M) Sumita 1.84909 40.5
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
D-ZLAF85L CDGM 1.8537 40.579411
D-ZLAF85L-25 CDGM 1.8526 40.534071
D-ZLAF85LS CDGM 1.8545 40.593546
D-ZLAF85A CDGM 1.85222 40.10819
D-ZLAF85A-25 CDGM 1.8511 40.055609
D-ZLAF85LN CDGM 1.84558 40.094322
D-ZLAF85LN-25 CDGM 1.84443 40.067973
H-ZLAF55C CDGM 1.83481 42.711575
H-ZLAF55D CDGM 1.83481 42.725177
H-ZLAF73 CDGM 1.881 40.161331
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