Schott LASF35 022291.541, Optical Glass

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Schott LASF35 022291.541, Optical Glass
Categories:	Ceramic; Glass; Optical
Material Notes:	Information provided by SCHOTT.
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Physical Properties	Original Value	Comments

Density	5.41 g/cc

Chemical Properties	Original Value	Comments
Acid Class, SR	1.3
Alkali Class, AR	1.0
Stain Resistance Class, FR	0.00

Mechanical Properties	Original Value	Comments
Hardness, Knoop	810	HK (0.1/20)
Modulus of Elasticity	132 GPa
Poissons Ratio	0.303
Shear Modulus	50.7 GPa	Calculated

Thermal Properties	Original Value	Comments
CTE, linear	7.40 µm/m-°C @Temperature -30.0 - 70.0 °C
	8.50 µm/m-°C @Temperature 20.0 - 300 °C
Specific Heat Capacity	0.445 J/g-°C
Thermal Conductivity	0.920 W/m-K
Transformation Temperature, Tg	774 °C

Optical Properties	Original Value	Comments
Refractive Index	1.959 @Wavelength 2323.4 nm
	1.966 @Wavelength 1970.1 nm
	1.974 @Wavelength 1529.6 nm
	1.986 @Wavelength 1060 nm
	1.987 @Wavelength 1014 nm
	1.995 @Wavelength 852.1 nm
	2.006 @Wavelength 706.5 nm
	2.011 @Wavelength 656.3 nm
	2.013 @Wavelength 643.8 nm
	2.014 @Wavelength 632.8 nm
	2.021 @Wavelength 589.3 nm
	2.022 @Wavelength 587.6 nm
	2.03 @Wavelength 546.1 nm
	2.047 @Wavelength 486.1 nm
	2.049 @Wavelength 480 nm
	2.068 @Wavelength 435.8 nm
	2.086 @Wavelength 404.7 nm
Abbe Number	28.84	ve
	29.06	vd
Optical Dispersion	0.03517	nf - nc
	0.035721	nf' - nc'
Transmission, Visible	55 % @Thickness 25.0 mm, Wavelength 420 nm
	67 % @Thickness 25.0 mm, Wavelength 436 nm
	77.4 % @Thickness 25.0 mm, Wavelength 460 nm
	78.7 % @Thickness 10.0 mm, Wavelength 420 nm
	85.2 % @Thickness 10.0 mm, Wavelength 436 nm
	87.4 % @Thickness 25.0 mm, Wavelength 500 nm
	90.3 % @Thickness 10.0 mm, Wavelength 460 nm
	94.3 % @Thickness 25.0 mm, Wavelength 546 nm
	94.8 % @Thickness 10.0 mm, Wavelength 500 nm
	96.2 % @Thickness 25.0 mm, Wavelength 580 nm
	96.9 % @Thickness 25.0 mm, Wavelength 620 nm
	97.4 % @Thickness 25.0 mm, Wavelength 660 nm
	97.7 % @Thickness 10.0 mm, Wavelength 546 nm
	98.1 % @Thickness 25.0 mm, Wavelength 700 nm
	98.5 % @Thickness 10.0 mm, Wavelength 580 nm
	98.7 % @Thickness 10.0 mm, Wavelength 620 nm
	99 % @Thickness 10.0 mm, Wavelength 660 nm
	99.2 % @Thickness 10.0 mm, Wavelength 700 nm
IR Transmittance	55 % @Thickness 25.0 mm, Wavelength 2500 nm
	72 % @Thickness 25.0 mm, Wavelength 2325 nm
	78.7 % @Thickness 10.0 mm, Wavelength 2500 nm
	87.7 % @Thickness 10.0 mm, Wavelength 2325 nm
	93.4 % @Thickness 25.0 mm, Wavelength 1970 nm
	97.3 % @Thickness 10.0 mm, Wavelength 1970 nm
	98.7 % @Thickness 25.0 mm, Wavelength 1530 nm
	99.4 % @Thickness 25.0 mm, Wavelength 1060 nm
	99.5 % @Thickness 10.0 mm, Wavelength 1530 nm
	99.8 % @Thickness 10.0 mm, Wavelength 1060 nm
UV Transmittance	3.0 % @Thickness 10.0 mm, Wavelength 365 nm
	5.0 % @Thickness 25.0 mm, Wavelength 380 nm
	10 % @Thickness 10.0 mm, Wavelength 370 nm
	18 % @Thickness 25.0 mm, Wavelength 390 nm
	30.2 % @Thickness 10.0 mm, Wavelength 380 nm
	32 % @Thickness 25.0 mm, Wavelength 400 nm
	39 % @Thickness 25.0 mm, Wavelength 405 nm
	50.4 % @Thickness 10.0 mm, Wavelength 390 nm
	63.4 % @Thickness 10.0 mm, Wavelength 400 nm
	68.6 % @Thickness 10.0 mm, Wavelength 405 nm

Descriptive Properties
Climatic resistance	1
Grindability	1	according to JOGIS
Phosphate resistance	1.3
Stress optical coefficient	0.73	[10^-6mm²/N]

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