UV Material
 Visible Material
 IR Material
 Color Material
 Sperical Material

B270

B270-Superwite is an universal, economically priced quality glass, with a high transparency for visible and near infrared light. The crown glass from Schott has a colorless, white appearance and is particularly clear. B 270 is available as drawn, fire-polished sheet glass or as unpolished bar raw glass. The B270 sheet material is available at many different standard thicknesses and can be used without further surface treatment if surface quality is uncritical. To meet more demanding optical surface quality requirements, B270 can be mechanically ground and optically polished. This facilitates B270 to be used for sophisticated optical quality applications, while keeping the cost under control.

Specifications of B 270-Superwite

Optical Properties
Optical Transmission spectrum of B 270
UV-Transmission of B 270
Abbe numbers:
ve = 58,3 +/-0,6
vd = 58,5

 Description

 Wavelength (nm)

 Refractive Index (20°C)

 ng

 436

 1.5341

 nF'

 480

 1.5297

 nF

 486

 1.5292

 ne

 546

 1.5251

 nd

 587.5

 1.5230

 nD

 589.3

 1.5229

 nC'

 644

 1.5207

 nC

 656

 1.5203


Mechanical Properties
Density 2,55 g/cm3
Young's modulus E 71,5 kN/mm2
Poisson's ratio μ 0,219
Torsion modulus G 29,3 kN/mm2
Knoop hardness HK100 542