H-ZLAF75B by CDGM

Obsolete Rare Environmentally Friendly

H-ZLAF75B by CDGM is an obsolete optical glass with a rare melt frequency. It transmits from 0.36 to 2.40 µm with an nd of 1.90366 and a Vd of 31.418411. It has medium thermal expansion (CTE of 7.0×10⁻⁶/K) and high relative cost.

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: 0.360–2.400 µm
Optical Properties
Refractive Index (nd) 1.90366
Abbe Number (Vd) 31.418411
Dispersion Formula Sellmeier
Wavelength Range 0.365 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{0.322804\,\lambda^2}{\lambda^2 - 0.0552627} + \frac{2.16371\,\lambda^2}{\lambda^2 - 0.0124574} + \frac{1.59868\,\lambda^2}{\lambda^2 - 108.246}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.0
TCE 100/300°C (10-6/K) 8.8
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-2.36 \times 10^{-6} + 2(1.27 \times 10^{-8})\,\Delta T + 3(-2.37 \times 10^{-11})\,\Delta T^2 + \frac{9.1 \times 10^{-7} + 2(1.21 \times 10^{-9})\,\Delta T}{\lambda - 0.262}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.56
Relative Cost 11.8
Mechanical Properties
Young's Modulus (GPa) 116.41
Poisson's Ratio 0.295
Knoop Hardness (kgf/mm²) 587.0
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
S-LAH95 Ohara 1.903659 31.343065
N-LASF46A Schott 1.90366 31.32
TAFD25L Hoya 1.90366 31.32
TAFD25 Hoya 1.90366 31.32
N-LASF46B Schott 1.90366 31.32
LAH78 Ohara 1.901355 31.550244
N-LASF46 Schott 1.90138 31.64
L-LAH86 Ohara 1.902699 31.00532
TAFD20 Hoya 1.90315 29.835563
SRMOO4 Generic Birefringent 1.908806 29.94765
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
H-ZLAF75C CDGM 1.90366 31.357126
H-ZLAF75A CDGM 1.90366 31.31497
H-ZLAF4LA CDGM 1.91082 35.25034
H-ZLAF4LB CDGM 1.91082 35.282389
H-ZLAF78B CDGM 1.90069 37.050531
D-ZLAF67 CDGM 1.88385 37.198899
D-ZLAF67-25 CDGM 1.88259 37.185491
H-ZLAF89LA CDGM 1.95375 32.276235
H-ZLAF89L CDGM 1.95375 32.30879
H-ZLAF71AGT CDGM 1.85026 32.216801
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