Schott BG64 Bandpass Filter

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Schott BG64 Bandpass Filter
Categories:	Ceramic; Glass; Optical; Filter
Material Notes:	IR filter glasses, BG60 – BG64 and BG67, have been designed to perform in difficult environments. Equipped with a specified coating, these filters remain completely transparent for more than 1000 hours without any surface corrosion and deliver extraordinary image quality. Advantages Repeatable optical performance due to mass production Excellent inner quality, e. g. low striae Allows true color imaging High NIR absorption at smaller thickness Applications: Medical Imaging Surveillance NVIS (night vision) compatible display Industrial applications Information provided by SCHOTT.
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Physical Properties	Original Value	Comments

Density	2.78 g/cc
Thickness	100 microns

Chemical Properties	Original Value	Comments
Acid Class, SR	52.3
Alkali Class, AR	3.3
Stain Resistance Class, FR	1.0

Mechanical Properties	Original Value	Comments
Hardness, Knoop	371	HK (0.1/20)

Thermal Properties	Original Value	Comments
CTE, linear	12.0 µm/m-°C @Temperature -30.0 - 70.0 °C
	13.8 µm/m-°C @Temperature 20.0 - 300 °C
Transformation Temperature, Tg	417 °C

Optical Properties	Original Value	Comments
Refractive Index	1.513 @Wavelength 404.7 nm
	1.53 @Wavelength 587.6 nm
	1.532 @Wavelength 546.1 nm
	1.549 @Wavelength 365 nm
Transmission, Visible	7.0 % @Wavelength 630 nm
	<= 55 % @Wavelength 694 nm
	>= 72 % @Wavelength 633 nm
	>= 99 % @Wavelength 514 nm
IR Transmittance	<= 0.0010 % @Wavelength 880 nm
	<= 8.7 % @Wavelength >=4150 nm
	9.0 % @Wavelength 2400 - 2800 nm
	9.8 % @Wavelength 1450 nm
	<= 45 % @Wavelength >=1060 nm
UV Transmittance	<= 2.3 % @Wavelength <=340 nm
	>= 99 % @Wavelength 405 nm
Reflection Coefficient, Visible (0-1)	0.916 @Wavelength 587.6 nm	Reflection Factor P

Descriptive Properties
Bubble class	2

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CSGT9851 / 183104

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