Corning 1.7 / 35 BLANC High index glass

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Corning 1.7 / 35 BLANC High index glass
Categories:	Ceramic; Glass; Optical
Material Notes:	Application : Ophthalmic lenses : Single vision, progressive addition Information provided by Corning Incorporated.
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Physical Properties	Original Value	Comments

Density	3.21 g/cc

Thermal Properties	Original Value	Comments
CTE, linear	7.60 µm/m-°C
Softening Point	800 °C
Annealing Point	670 °C
Strain Point	800 °C

Optical Properties	Original Value	Comments
Refractive Index	1.69411 @Wavelength 656.3 nm	Line: C; Hydrogen
	1.69506 @Wavelength 643.8 nm	Line: C'; Cadmium
	1.700 @Wavelength 587.6 nm	Line: d; Helium
	1.70482 @Wavelength 546.1 nm	Line: e; Mercury
	1.71431 @Wavelength 486.1 nm	Line: F; Hydrogen
	1.71554 @Wavelength 480 nm	Line: F'; Cadmium
Abbe Number	34.4	ve
	34.6	vd
Transmission, Visible	86.5 % @Wavelength 380 - 500 nm, Thickness 2.00 mm	Blue light transmission factor
	86.8 % @Wavelength 380 - 780 nm, Thickness 2.00 mm	Luminous; ISO 8980-3
UV Transmittance	<= 0.10 % @Thickness 2.00 mm	Solar UV-B transmission factor
	20 % @Thickness 2.00 mm	Solar UV-A transmission factor
	<= 0.10 % @Wavelength 280 - 315 nm, Thickness 2.00 mm
	29 % @Wavelength 315 - 380 nm, Thickness 2.00 mm

Descriptive Properties
Color	White

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