Schott P-LASF51 8104909.458, Optical Glass

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Schott P-LASF51 8104909.458, Optical Glass
Categories:	Ceramic; Glass; Optical
Material Notes:	Information provided by SCHOTT.
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Physical Properties	Original Value	Comments

Density	4.58 g/cc

Chemical Properties	Original Value	Comments
Acid Class, SR	51.3
Alkali Class, AR	1.0
Stain Resistance Class, FR	1.0

Mechanical Properties	Original Value	Comments
Hardness, Knoop	722	HK (0.1/20)
Modulus of Elasticity	119 GPa
Poissons Ratio	0.299
Shear Modulus	45.8 GPa	Calculated

Thermal Properties	Original Value	Comments
CTE, linear	6.00 µm/m-°C @Temperature -30.0 - 70.0 °C
	7.40 µm/m-°C @Temperature 20.0 - 300 °C
Specific Heat Capacity	0.560 J/g-°C
Thermal Conductivity	0.870 W/m-K
Transformation Temperature, Tg	526 °C
Softening Point	629 °C	viscosity of 10^7.6 cP
Annealing Point	534 °C	viscosity of 10¹³ cP

Optical Properties	Original Value	Comments
Refractive Index	1.764 @Wavelength 2323.4 nm
	1.771 @Wavelength 1970.1 nm
	1.778 @Wavelength 1060 nm
	1.779 @Wavelength 1529.6 nm
	1.789 @Wavelength 1014 nm
	1.794 @Wavelength 852.1 nm
	1.80 @Wavelength 706.5 nm
	1.804 @Wavelength 656.3 nm
	1.805 @Wavelength 632.8 nm
	1.805 @Wavelength 643.8 nm
	1.809 @Wavelength 589.3 nm
	1.81 @Wavelength 587.6 nm
	1.814 @Wavelength 546.1 nm
	1.82390 @Wavelength 486.1 nm
	1.825 @Wavelength 480 nm
	1.835 @Wavelength 435.8 nm
	1.844 @Wavelength 404.7 nm
	1.861 @Wavelength 365 nm
	1.88 @Wavelength 334.1 nm
Abbe Number	40.68	ve
	40.93	vd
Optical Dispersion	0.019792	nf - nc
	0.020025	nf' - nc'
Transmission, Visible	95 % @Thickness 25.0 mm, Wavelength 420 nm
	96.3 % @Thickness 25.0 mm, Wavelength 436 nm
	97.5 % @Thickness 25.0 mm, Wavelength 460 nm
	98 % @Thickness 10.0 mm, Wavelength 420 nm
	98.5 % @Thickness 10.0 mm, Wavelength 436 nm
	98.7 % @Thickness 25.0 mm, Wavelength 500 nm
	99 % @Thickness 10.0 mm, Wavelength 460 nm
	99.2 % @Thickness 25.0 mm, Wavelength 620 nm
	99.2 % @Thickness 25.0 mm, Wavelength 546 nm
	99.2 % @Thickness 25.0 mm, Wavelength 580 nm
	99.3 % @Thickness 25.0 mm, Wavelength 660 nm
	99.5 % @Thickness 25.0 mm, Wavelength 700 nm
	99.5 % @Thickness 10.0 mm, Wavelength 500 nm
	99.7 % @Thickness 10.0 mm, Wavelength 546 nm
	99.7 % @Thickness 10.0 mm, Wavelength 660 nm
	99.7 % @Thickness 10.0 mm, Wavelength 580 nm
	99.7 % @Thickness 10.0 mm, Wavelength 620 nm
	99.8 % @Thickness 10.0 mm, Wavelength 700 nm
IR Transmittance	20 % @Thickness 25.0 mm, Wavelength 2500 nm
	52.5 % @Thickness 10.0 mm, Wavelength 2500 nm
	53 % @Thickness 25.0 mm, Wavelength 2325 nm
	77.6 % @Thickness 10.0 mm, Wavelength 2325 nm
	88 % @Thickness 25.0 mm, Wavelength 1970 nm
	95 % @Thickness 10.0 mm, Wavelength 1970 nm
	98.1 % @Thickness 25.0 mm, Wavelength 1530 nm
	99.2 % @Thickness 10.0 mm, Wavelength 1530 nm
	99.8 % @Thickness 25.0 mm, Wavelength 1060 nm
	99.9 % @Thickness 10.0 mm, Wavelength 1060 nm
UV Transmittance	1.2 % @Thickness 10.0 mm, Wavelength 320 nm
	3.0 % @Thickness 25.0 mm, Wavelength 334 nm
	25 % @Thickness 10.0 mm, Wavelength 334 nm
	35 % @Thickness 25.0 mm, Wavelength 350 nm
	65 % @Thickness 25.0 mm, Wavelength 365 nm
	65.7 % @Thickness 10.0 mm, Wavelength 350 nm
	72 % @Thickness 25.0 mm, Wavelength 370 nm
	83 % @Thickness 25.0 mm, Wavelength 380 nm
	84.2 % @Thickness 10.0 mm, Wavelength 365 nm
	87.7 % @Thickness 10.0 mm, Wavelength 370 nm
	89 % @Thickness 25.0 mm, Wavelength 390 nm
	92 % @Thickness 25.0 mm, Wavelength 400 nm
	92.8 % @Thickness 10.0 mm, Wavelength 380 nm
	93 % @Thickness 25.0 mm, Wavelength 405 nm
	95.4 % @Thickness 10.0 mm, Wavelength 390 nm
	96.7 % @Thickness 10.0 mm, Wavelength 400 nm
	97.1 % @Thickness 10.0 mm, Wavelength 405 nm

Descriptive Properties
Acid resistance class	3	according to JOGIS
Climatic resistance	1
Grindability	66	according to JOGIS
Phosphate resistance	2.2
Stress optical coefficient	2.32	[10^-6mm²/N]
Water resistance class	1	according to JOGIS
Yield point/sag temperature	570°C

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