D-ZLAF81 by CDGM

Standard Rare Precision Molding Environmentally Friendly

D-ZLAF81 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 1.8088 and a Vd of 40.999441. It has low thermal expansion (CTE of 6.4×10⁻⁶/K), 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) 1.8088
Abbe Number (Vd) 40.999441
Dispersion Formula Sellmeier
Wavelength Range 0.365 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{1.88619\,\lambda^2}{\lambda^2 - 0.00991169} + \frac{0.294672\,\lambda^2}{\lambda^2 - 0.0409688} + \frac{1.27989\,\lambda^2}{\lambda^2 - 97.7975}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.4
TCE 100/300°C (10-6/K) 8.1
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[4.97 \times 10^{-6} + 2(1.47 \times 10^{-8})\,\Delta T + 3(-2.54 \times 10^{-11})\,\Delta T^2 + \frac{9.18 \times 10^{-7} + 2(8.5 \times 10^{-10})\,\Delta T}{\lambda - 0.182}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.55
Relative Cost 12.3
Mechanical Properties
Young's Modulus (GPa) 114.05
Poisson's Ratio 0.286
Knoop Hardness (kgf/mm²) 668.0
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Notes

anneal rate:4℃/h

Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
MC-NBFD135 Hoya 1.80834 40.92
K-VC89 Sumita 1.81 41.0
P-LASF51 Schott 1.81 40.93
K-VC181 Sumita 1.81055 41.1
L-LAH53 Ohara 1.806249 40.907302
LAH53 Ohara 1.806098 40.948508
S-LAH53V Ohara 1.806099 40.929791
S-LAH53 Ohara 1.806098 40.925996
K-VC181(M) Sumita 1.80614 41.1
P-LASF47 Schott 1.8061 40.9
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
D-ZLAF52LA-25 CDGM 1.80882 40.970313
D-ZLAF52LA CDGM 1.81 40.992863
D-ZLAF81-25 CDGM 1.80757 40.97334
H-ZLAF52A CDGM 1.8061 41.016887
H-ZLAF52 CDGM 1.806099 40.945389
H-ZLAF51 CDGM 1.8045 39.635248
H-LAF54 CDGM 1.799519 42.253294
D-ZLAF61-25 CDGM 1.82131 42.674895
D-ZLAF61 CDGM 1.82241 42.714541
H-ZLAF1 CDGM 1.80166 44.263459
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