Corning 1.6 / 41 BLANC TC Medium index glass, Chemtemperable

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Corning 1.6 / 41 BLANC TC Medium index glass, Chemtemperable
Categories:	Ceramic; Glass; Optical
Material Notes:	Application : Ophthalmic lenses : Single vision, progressive addition Information provided by Corning Incorporated.
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Physical Properties	Metric	English	Comments

Density	2.63 g/cc	0.0950 lb/in³

Thermal Properties	Metric	English	Comments
CTE, linear	10.0 µm/m-°C	5.56 µin/in-°F
Softening Point	610 °C	1130 °F
Annealing Point	490 °C	914 °F
Strain Point	610 °C	1130 °F

Optical Properties	Metric	English	Comments
Refractive Index	1.59619 @Wavelength 656.3 nm	1.59619 @Wavelength 656.3 nm	Line: C; Hydrogen
	1.59684 @Wavelength 643.8 nm	1.59684 @Wavelength 643.8 nm	Line: C'; Cadmium
	1.6005 @Wavelength 587.6 nm	1.6005 @Wavelength 587.6 nm	Line: d; Helium
	1.60391 @Wavelength 546.1 nm	1.60391 @Wavelength 546.1 nm	Line: e; Mercury
	1.61063 @Wavelength 486.1 nm	1.61063 @Wavelength 486.1 nm	Line: F; Hydrogen
	1.61149 @Wavelength 480 nm	1.61149 @Wavelength 480 nm	Line: F'; Cadmium
Abbe Number	41.2	41.2	ve
	41.5	41.5	vd
Transmission, Visible	89.5 % @Wavelength 380 - 780 nm, Thickness 2.00 mm	89.5 % @Wavelength 380 - 780 nm, Thickness 0.0787 in	Luminous; ISO 8980-3
	89.5 % @Wavelength 380 - 500 nm, Thickness 2.00 mm	89.5 % @Wavelength 380 - 500 nm, Thickness 0.0787 in	Blue light transmission factor
UV Transmittance	<= 0.10 % @Thickness 2.00 mm	<= 0.10 % @Thickness 0.0787 in	Solar UV-B transmission factor
	31 % @Thickness 2.00 mm	31 % @Thickness 0.0787 in	Solar UV-A transmission factor
	<= 0.10 % @Wavelength 280 - 315 nm, Thickness 2.00 mm	<= 0.10 % @Wavelength 280 - 315 nm, Thickness 0.0787 in
	42 % @Wavelength 315 - 380 nm, Thickness 2.00 mm	42 % @Wavelength 315 - 380 nm, Thickness 0.0787 in

Descriptive Properties
Color	White

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