D-ZLAF61 by CDGM

Standard Rare Precision Molding Environmentally Friendly

D-ZLAF61 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 1.82241 and a Vd of 42.714541. It has medium thermal expansion (CTE of 6.6×10⁻⁶/K), excellent chemical resistance, 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) 1.82241
Abbe Number (Vd) 42.714541
Dispersion Formula Sellmeier
Wavelength Range 0.365 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{0.427426\,\lambda^2}{\lambda^2 - 0.0344432} + \frac{1.80371\,\lambda^2}{\lambda^2 - 0.00878105} + \frac{1.26949\,\lambda^2}{\lambda^2 - 99.7954}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.6
TCE 100/300°C (10-6/K) 8.5
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[4.38 \times 10^{-6} + 2(1.46 \times 10^{-8})\,\Delta T + 3(-1.77 \times 10^{-11})\,\Delta T^2 + \frac{7.39 \times 10^{-7} + 2(6.32 \times 10^{-10})\,\Delta T}{\lambda - 0.229}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.92
Relative Cost 24.9
Mechanical Properties
Young's Modulus (GPa) 118.42
Poisson's Ratio 0.301
Knoop Hardness (kgf/mm²) 691.0
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Notes

anneal rate:4℃/h

Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
MP-TAFD51-50 Hoya 1.8213 42.72
MC-TAFD51-50 Hoya 1.8213 42.72
M-TAFD51 Hoya 1.8208 42.71
S-LAH55 Ohara 1.834807 42.713673
LAH55 Ohara 1.834807 42.72372
S-LAH55V Ohara 1.834807 42.725324
TAFD5F Hoya 1.83481 42.72
TAFD5G Hoya 1.83481 42.72
S-LAH55VS Ohara 1.834809 42.74368
K-LaSFn8W Sumita 1.8349 42.7
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
D-ZLAF61-25 CDGM 1.82131 42.674895
H-ZLAF55C CDGM 1.83481 42.711575
H-ZLAF55D CDGM 1.83481 42.725177
D-ZLAF52LA CDGM 1.81 40.992863
D-ZLAF81 CDGM 1.8088 40.999441
D-ZLAF52LA-25 CDGM 1.80882 40.970313
D-ZLAF81-25 CDGM 1.80757 40.97334
H-ZLAF52A CDGM 1.8061 41.016887
H-ZLAF52 CDGM 1.806099 40.945389
H-LAF54 CDGM 1.799519 42.253294
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