Schott BG55 Bandpass Filter

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Schott BG55 Bandpass Filter
Categories:	Ceramic; Glass; Optical; Filter
Material Notes:	Excellent optical properties include high transmission in addition to high blocking with a very narrow transition range. Furthermore, this glass is an ideal bandpass filter for visual areas when high absorption in the near infrared (NIR) wavelength range is required. The slope of the IR edge is exceptional, and guarantees a sharp distinction between visible light and NIR radiation. Advantages Extraordinarily high transmittance in the visible range High NIR absorption Excellent inner quality, e. g. low striae Allows true color imaging Applications: Medical Imaging Surveillance NVIS (night vision) Industrial applications Information provided by SCHOTT.
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Physical Properties	Original Value	Comments

Density	2.64 g/cc
Thickness	100 microns

Chemical Properties	Original Value	Comments
Acid Class, SR	2.0
Alkali Class, AR	2.0
Stain Resistance Class, FR	0.00

Mechanical Properties	Original Value	Comments
Hardness, Knoop	504	HK (0.1/20)

Thermal Properties	Original Value	Comments
CTE, linear	7.20 µm/m-°C @Temperature -30.0 - 70.0 °C
	9.10 µm/m-°C @Temperature 20.0 - 300 °C
Transformation Temperature, Tg	453 °C

Optical Properties	Original Value	Comments
Refractive Index	1.54 @Wavelength 597.6 nm
	1.542 @Wavelength 546.1 nm
	1.554 @Wavelength 404.7 nm
	1.56 @Wavelength 365 nm
Transmission, Visible	<= 1.6 % @Wavelength 694 nm
	7.2 % @Wavelength 660 nm
	<= 18 % @Wavelength 633 nm
	>= 93 % @Wavelength 514 nm
IR Transmittance	0.0012 % @Wavelength 880 nm
	<= 0.050 % @Wavelength >=1060 nm
	<= 5.6 % @Wavelength >=2850 nm
	7.5 % @Wavelength 1400 nm
	80 % @Wavelength 2000 - 2600 nm
UV Transmittance	<= 9.2 % @Wavelength <=320 nm
	>= 76 % @Wavelength 405 nm
Reflection Coefficient, Visible (0-1)	0.914 @Wavelength 587.6 nm	Reflection Factor P

Descriptive Properties
Bubble class	2

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CSGT9843 / 183096

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