N-PK52A by Schott

Preferred Unknown Precision Molding Environmentally Friendly

N-PK52A by Schott is a preferred optical glass. It transmits from 0.29 to 2.50 µm with an nd of 1.497 and a Vd of 81.61. It has high thermal expansion (CTE of 13.01×10⁻⁶/K), below average chemical resistance, moderate relative cost, and precision molding compatibility.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.29–2.5 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.29–2.5 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.290–2.500 µm
Optical Properties
Refractive Index (nd) 1.497
Abbe Number (Vd) 81.61
Dispersion Formula Sellmeier
Wavelength Range 0.29 — 2.5 µm
$$n(\lambda) = \sqrt{1 + \frac{1.02961\,\lambda^2}{\lambda^2 - 0.005168} + \frac{0.188051\,\lambda^2}{\lambda^2 - 0.0166659} + \frac{0.736488\,\lambda^2}{\lambda^2 - 138.964}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 13.01
TCE 100/300°C (10-6/K) 15.0
Thermal Conductivity (W/mK) 0.73
Heat Capacity (J/gK) 0.67
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-1.97 \times 10^{-5} + 2(-5.5 \times 10^{-9})\,\Delta T + 3(5.28 \times 10^{-12})\,\Delta T^2 + \frac{3.6 \times 10^{-7} + 2(2.45 \times 10^{-10})\,\Delta T}{\lambda - 0.172}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.7
Relative Cost 7.0
Mechanical Properties
Young's Modulus (GPa) 71.0
Poisson's Ratio 0.3
Knoop Hardness (kgf/mm²) 355.0
Chemical Resistance
Climatic Resistance 1
Stain Resistance 0
Acid Resistance 52
Alkali Resistance 3
Phosphate Resistance 4
Notes

suitable for precision molding

Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
FCD1 Hoya 1.497 81.61
D-FK61 CDGM 1.497 81.611615
H-FK61GTI CDGM 1.497 81.612838
H-FK61 CDGM 1.497 81.612838
D-FK61A CDGM 1.497 81.605419
H-FK61B CDGM 1.497 81.605419
FPL51 Ohara 1.496999 81.61466
M-FCD1 Hoya 1.4971 81.56
FCD1B Hoya 1.4971 81.56
S-FPL51 Ohara 1.496999 81.545888
Similar Glasses (Schott)
Glass Manufacturer nd Vd Compare
N-PK52 Schott 1.497005 81.633263
FK52 Schott 1.486052 81.802215
FK51 Schott 1.486561 84.467994
N-FK51 Schott 1.48656 84.47
N-FK51A Schott 1.48656 84.47
ULTRAN20 Schott 1.486561 84.473976
N-PK51 Schott 1.52855 76.98
PK51A Schott 1.528554 76.975515
ULTRAN30 Schott 1.5483 74.244488
N-FK58 Schott 1.456 90.9
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