Songhan Plastic Technology Co.,Ltd.
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Schott BG20 Band Filter

Category Ceramic , Glass , Optical , Filter
Manufacturer Schott Glas Mainz
Trade Name
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Schott BG20 Band Filter.pdf
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Material Notes:
Ionically colored glass. Data provided by the manufacturer, Schott Glas Mainz..Similar glasses include BC36
Physical Properties Metric English Comments
Density 2.86 g/cc
0.103 lb/in³
Thermal Properties Metric English Comments
CTE, linear 8.30 µm/m-°C

@Temperature -30.0 - 70.0 °C
 4.61 µin/in-°F

@Temperature -22.0 - 158 °F
9.30 µm/m-°C

@Temperature 20.0 - 300 °C
 5.17 µin/in-°F

@Temperature 68.0 - 572 °F
Transformation Temperature, Tg 561 °C
1040 °F
Optical Properties Metric English Comments
Refractive Index 1.55

@Wavelength 587.6 nm
 1.55

@Wavelength 587.6 nm
 He
Transmission, Visible 91 %

@Wavelength 651 nm
 91 %

@Wavelength 651 nm
 Internal transmittance of 100% at 651nm.
IR Transmittance 90 - 91 %

@Wavelength 940 - 1300 nm
 90 - 91 %

@Wavelength 940 - 1300 nm
 Internal transmittance of 98-100%  from 940-1300 nm.
91 %

@Wavelength 710 nm
 91 %

@Wavelength 710 nm
 Internal transmittance of 100% at 710 nm.
UV Transmittance <= 5.0 %

@Wavelength 200 - 250 nm
 <= 5.0 %

@Wavelength 200 - 250 nm
90 - 91 %

@Wavelength 375 - 390 nm
 90 - 91 %

@Wavelength 375 - 390 nm
 Internal transmittance of  99-100%  from 375-390 nm
Reflection Coefficient, Visible (0-1) 0.91
0.91
Chemical Properties Metric English Comments
Acid Class, SR 1
1
Alkali Class, AR 1
1
Stain Resistance Class, FR 0.0
0.0
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