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Knight Optical (UK) Limited © Whilst every effort has been made to verify the information and data, Knight Optical (UK) Limited can take no responsibility for its accuracy
The KNIGHT OPTICAL name and/or mark and KO KNIGHT OPTICAL LOGO are the trade marks of Knight Optical (UK) Limited
+44 (0)1622 859444
www.knightoptical.com
TM
SHEET & TECHNICAL GLASSES
Technical / Sheet Glasses
Schott B270 for 320-2600nm transmission
TSG-B270
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Knight Optical (UK) Limited © Whilst every effort has been made to verify the information and data, Knight Optical (UK) Limited can take no responsibility for its accuracy
The KNIGHT OPTICAL name and/or mark and KO KNIGHT OPTICAL LOGO are the trade marks of Knight Optical (UK) Limited
+44 (0)1622 859444
www.knightoptical.com
TM
SHEET & TECHNICAL GLASSES
Title: Technical / Sheet GlassesRange / Description: Schott B270 for 320-2600nm transmissionMaterial / Specification: TSG-B270
B 270 Superwite
B 270 Superwite is a clear high transmission crown glass (modified soda-lime glass) available in form of sheets, optical rods, profiled rods, strips and chain moulded rod.
Optical properties
Refractive indices (20 °C)
Pretreatment of samples n g 1.53
annealed at 40 °C/h n F´ 1.53
n F 1.53
n e 1.5251 ± 0.001*
n d 1.52
n D 1.52
* ± 0.0003 upon request n C´ 1.52
n C 1.52
Further refractive indices in UV and IR (reference values) see annex
Abbe value νe 58.3 ± 0.6
νd 58.5
Transmittance data
Spectral transmittance τ (λ )
τ (λ ) - curve
Plot of spectral transmittance τ (λ ) for
d = 2.0 mm and d = 15 mm (λ = 280 nm to 650 nm)
d = 2.0 mm and d = 15 mm (λ = 280 nm to 2000 nm)
see annexsee annex
τ (λ ) - individual values in % see annex
Edge wavelength (d = 2.0 mm)
Edge wavelength λ c (τ = 0.46) in nm 312 312
Additional data λ S (τ = 0.05) in nm 294 294
λ P (τ = 0.85) in nm 340 340
Luminous transmittance τ v
Luminous transmittance as a function of thickness
Thickness in mm τ vD65 in % τ vA in %
2 91.7 91.7
4 91.6 91.6
15 91 91
© Knight Optical (UK) Ltd.Whilst every effort has been made to verify this data, Knight Optical (UK) Ltd. can take no responsibility for its accuracy.
Tel: +44 (0) 1622 859444
Fax: +44 (0) 1622 859555
http://www.knightoptical.co.uk
Knight Optical (UK) Limited © Whilst every effort has been made to verify the information and data, Knight Optical (UK) Limited can take no responsibility for its accuracy
The KNIGHT OPTICAL name and/or mark and KO KNIGHT OPTICAL LOGO are the trade marks of Knight Optical (UK) Limited
+44 (0)1622 859444
www.knightoptical.com
TM
SHEET & TECHNICAL GLASSES
Knight Optical (UK) Limited © Whilst every effort has been made to verify the information and data, Knight Optical (UK) Limited can take no responsibility for its accuracy
The KNIGHT OPTICAL name and/or mark and KO KNIGHT OPTICAL LOGO are the trade marks of Knight Optical (UK) Limited
+44 (0)1622 859444
www.knightoptical.com
TM
SHEET & TECHNICAL GLASSES
Knight Optical (UK) Limited © Whilst every effort has been made to verify the information and data, Knight Optical (UK) Limited can take no responsibility for its accuracy
The KNIGHT OPTICAL name and/or mark and KO KNIGHT OPTICAL LOGO are the trade marks of Knight Optical (UK) Limited
+44 (0)1622 859444
www.knightoptical.com
TM
SHEET & TECHNICAL GLASSES
Knight Optical (UK) Limited © Whilst every effort has been made to verify the information and data, Knight Optical (UK) Limited can take no responsibility for its accuracy
The KNIGHT OPTICAL name and/or mark and KO KNIGHT OPTICAL LOGO are the trade marks of Knight Optical (UK) Limited
+44 (0)1622 859444
www.knightoptical.com
TM
SHEET & TECHNICAL GLASSES
