Schott N-LAF3 717480.414, Optical Glass

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Schott N-LAF3 717480.414, Optical Glass
Categories:	Ceramic; Glass; Optical
Material Notes:	Information provided by SCHOTT.
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Physical Properties	Original Value	Comments

Density	4.14 g/cc

Chemical Properties	Original Value	Comments
Acid Class, SR	52.3
Alkali Class, AR	1.2
Stain Resistance Class, FR	3.0

Mechanical Properties	Original Value	Comments
Hardness, Knoop	580	HK (0.1/20)
Modulus of Elasticity	95.0 GPa
Poissons Ratio	0.286
Shear Modulus	36.9 GPa	Calculated

Thermal Properties	Original Value	Comments
CTE, linear	7.60 µm/m-°C @Temperature -30.0 - 70.0 °C
	8.70 µm/m-°C @Temperature 20.0 - 300 °C
Transformation Temperature, Tg	646 °C
Softening Point	740 °C	viscosity of 10^7.6 cP
Annealing Point	640 °C	viscosity of 10¹³ cP

Optical Properties	Original Value	Comments
Refractive Index	1.68 @Wavelength 2325.4 nm
	1.686 @Wavelength 1970.1 nm
	1.692 @Wavelength 1529.6 nm
	1.70 @Wavelength 1060 nm
	1.701 @Wavelength 1014 nm
	1.704 @Wavelength 852.1 nm
	1.71 @Wavelength 706.5 nm
	1.712 @Wavelength 656.3 nm
	1.713 @Wavelength 643.8 nm
	1.714 @Wavelength 632.8 nm
	1.716 @Wavelength 589.3 nm
	1.717 @Wavelength 587.6 nm
	1.72 @Wavelength 546.1 nm
	1.727 @Wavelength 486.1 nm
	1.728 @Wavelength 480 nm
	1.735 @Wavelength 435.8 nm
	1.742 @Wavelength 404.7 nm
	1.755 @Wavelength 365 nm
Abbe Number	47.68	ve
	47.96	vd
Optical Dispersion	0.01495	nf - nc
	0.015112	nf' - nc'
Transmission, Visible	94 % @Thickness 25.0 mm, Wavelength 420 nm
	95.5 % @Thickness 25.0 mm, Wavelength 436 nm
	96.8 % @Thickness 25.0 mm, Wavelength 460 nm
	97.6 % @Thickness 10.0 mm, Wavelength 420 nm
	98.2 % @Thickness 10.0 mm, Wavelength 436 nm
	98.5 % @Thickness 25.0 mm, Wavelength 500 nm
	98.7 % @Thickness 10.0 mm, Wavelength 460 nm
	99.3 % @Thickness 25.0 mm, Wavelength 620 nm
	99.3 % @Thickness 25.0 mm, Wavelength 660 nm
	99.3 % @Thickness 25.0 mm, Wavelength 700 nm
	99.3 % @Thickness 25.0 mm, Wavelength 546 nm
	99.3 % @Thickness 25.0 mm, Wavelength 580 nm
	99.4 % @Thickness 10.0 mm, Wavelength 500 nm
	99.7 % @Thickness 10.0 mm, Wavelength 546 nm
	99.7 % @Thickness 10.0 mm, Wavelength 580 nm
	99.7 % @Thickness 10.0 mm, Wavelength 700 nm
	99.7 % @Thickness 10.0 mm, Wavelength 660 nm
	99.7 % @Thickness 10.0 mm, Wavelength 620 nm
IR Transmittance	31 % @Thickness 25.0 mm, Wavelength 2500 nm
	58 % @Thickness 25.0 mm, Wavelength 2325 nm
	62.6 % @Thickness 10.0 mm, Wavelength 2500 nm
	80.4 % @Thickness 10.0 mm, Wavelength 2325 nm
	88 % @Thickness 25.0 mm, Wavelength 1970 nm
	95 % @Thickness 10.0 mm, Wavelength 1970 nm
	98 % @Thickness 25.0 mm, Wavelength 1530 nm
	99.2 % @Thickness 10.0 mm, Wavelength 1530 nm
	99.3 % @Thickness 25.0 mm, Wavelength 1060 nm
	99.7 % @Thickness 10.0 mm, Wavelength 1060 nm
UV Transmittance	0.60 % @Thickness 10.0 mm, Wavelength 334 nm
	6.0 % @Thickness 25.0 mm, Wavelength 350 nm
	31.4 % @Thickness 10.0 mm, Wavelength 350 nm
	42 % @Thickness 25.0 mm, Wavelength 365 nm
	54 % @Thickness 25.0 mm, Wavelength 370 nm
	70.7 % @Thickness 10.0 mm, Wavelength 365 nm
	72 % @Thickness 25.0 mm, Wavelength 380 nm
	78.2 % @Thickness 10.0 mm, Wavelength 370 nm
	83 % @Thickness 25.0 mm, Wavelength 390 nm
	87.7 % @Thickness 10.0 mm, Wavelength 380 nm
	89 % @Thickness 25.0 mm, Wavelength 400 nm
	91 % @Thickness 25.0 mm, Wavelength 405 nm
	92.8 % @Thickness 10.0 mm, Wavelength 390 nm
	95.4 % @Thickness 10.0 mm, Wavelength 400 nm
	96.3 % @Thickness 10.0 mm, Wavelength 405 nm

Descriptive Properties
Climatic resistance	2
Grindability	5	ISO 12844
Phosphate resistance	3.3
Stress optical coefficient	1.53	[10^-6mm²/N]

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