Schott GG420 Long Pass Filter

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Schott GG420 Long Pass Filter
Categories:	Ceramic; Glass; Optical; Filter
Material Notes:	Colloidally colored glass. Data provided by the manufacturer, Schott Glas Mainz. Similar glasses include GG395, GG400, GG385, GG435, GG455, GG475, GG495, OG515, OG530, OG550, OG570, OG590, RG610, RG630, RG645, RG665, RG695, RG715, RG780, RG830, RG850, RG1000, WG225, WG280, WG295, WG305, WG320
Key Words:	DIN LP420
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Physical Properties	Original Value	Comments

Density	2.76 g/cc

Chemical Properties	Original Value	Comments
Acid Class, SR	1
Alkali Class, AR	2.3
Stain Resistance Class, FR	0.0

Thermal Properties	Original Value	Comments
CTE, linear	7.70 µm/m-°C @Temperature -30.0 - 70.0 °C
	8.60 µm/m-°C @Temperature 20.0 - 300 °C
Transformation Temperature, Tg	586 °C
Glass Temperature Coefficient	0.080

Optical Properties	Original Value	Comments
Refractive Index	1.53 @Wavelength 1014 nm	Hg
	1.54 @Wavelength 587.6 nm	He
	1.56 @Wavelength 435.8 nm	Hg
Transmission, Visible	<= 0.70 % @Wavelength 400 - 410 nm
	90 % @Wavelength 500 - 510 nm	Internal transmittance of 99% from 500-510 nm
IR Transmittance	91 % @Wavelength 710 - 1600 nm	Internal transmittance of 100% from 710-1600 nm.
UV Transmittance	0.0010 % @Wavelength 200 - 400 nm	Internal transmittance of 0.001% from 200-400 nm.
Reflection Coefficient, Visible (0-1)	0.90 @Wavelength 587.6 nm	Reflection Factor P

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