Schott BG12 Band Pass Filter

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Schott BG12 Band Pass Filter
Categories:	Ceramic; Glass; Optical; Filter
Material Notes:	Ionically colored glass. Data provided by the manufacturer, Schott Glas Mainz.
Key Words:	DIN BP 409/140
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Physical Properties	Metric	English	Comments

Density	2.58 g/cc	0.0932 lb/in³

Chemical Properties	Metric	English	Comments
Acid Class, SR	1	1
Alkali Class, AR	1	1
Stain Resistance Class, FR	0.0	0.0

Thermal Properties	Metric	English	Comments
CTE, linear	8.60 µm/m-°C @Temperature -30.0 - 70.0 °C	4.78 µin/in-°F @Temperature -22.0 - 158 °F
	10.1 µm/m-°C @Temperature 20.0 - 300 °C	5.61 µin/in-°F @Temperature 68.0 - 572 °F
Transformation Temperature, Tg	480 °C	896 °F

Optical Properties	Metric	English	Comments
Refractive Index	1.52 @Wavelength 587.6 nm	1.52 @Wavelength 587.6 nm	He
	1.53 @Wavelength 404.7 nm	1.53 @Wavelength 404.7 nm	Hg
Transmission, Visible	<= 1.0 % @Wavelength 540 - 700 nm	<= 1.0 % @Wavelength 540 - 700 nm
	80 % @Wavelength 390 - 400 nm	80 % @Wavelength 390 - 400 nm	Internal transmittance of 87% from 390-400 nm
	80 % @Wavelength 400 - 410 nm	80 % @Wavelength 400 - 410 nm	Internal transmittance of 87% from 400-410 nm
IR Transmittance	75 % @Wavelength 2500 - 2600 nm	75 % @Wavelength 2500 - 2600 nm	Internal transmittance of 82% at 2600 nm.
UV Transmittance	<= 0.040 % @Wavelength 200 - 310 nm	<= 0.040 % @Wavelength 200 - 310 nm
Reflection Coefficient, Visible (0-1)	0.92 @Wavelength 587.6 nm	0.92 @Wavelength 587.6 nm	Reflection Factor P

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CSGT04 / 1993

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