Schott P-LAF37 755457.399, Optical Glass

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Schott P-LAF37 755457.399, Optical Glass
Categories:	Ceramic; Glass; Optical
Material Notes:	Information provided by SCHOTT.
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Physical Properties	Original Value	Comments

Density	3.99 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Knoop	697	HK (0.1/20)
Modulus of Elasticity	115 GPa
Poissons Ratio	0.296
Shear Modulus	44.4 GPa	Calculated

Thermal Properties	Original Value	Comments
CTE, linear	6.30 µm/m-°C @Temperature -30.0 - 70.0 °C
	7.80 µm/m-°C @Temperature 20.0 - 300 °C
Specific Heat Capacity	0.640 J/g-°C
Thermal Conductivity	0.900 W/m-K
Transformation Temperature, Tg	506 °C
Softening Point	593 °C	viscosity of 10^7.6 cP
Annealing Point	510 °C	viscosity of 10¹³ cP

Optical Properties	Original Value	Comments
Refractive Index	1.713 @Wavelength 2323.4 nm
	1.72 @Wavelength 1970.1 nm
	1.728 @Wavelength 1529.6 nm
	1.736 @Wavelength 1060 nm
	1.737 @Wavelength 1014 nm
	1.741 @Wavelength 852.1 nm
	1.747 @Wavelength 706.5 nm
	1.75 @Wavelength 656.3 nm
	1.751 @Wavelength 643.8 nm
	1.752 @Wavelength 632.8 nm
	1.755 @Wavelength 589.3 nm
	1.755 @Wavelength 587.6 nm
	1.756 @Wavelength 546.1 nm
	1.768 @Wavelength 480 nm
	1.776 @Wavelength 435.8 nm
	1.784 @Wavelength 404.7 nm
	1.797 @Wavelength 486.1 nm
Abbe Number	45.42	ve
	45.66	vd
Optical Dispersion	0.016546	nf - nc
	0.016722	nf' - nc'
Transmission, Visible	96.7 % @Thickness 25.0 mm, Wavelength 420 nm
	97.5 % @Thickness 25.0 mm, Wavelength 436 nm
	98.3 % @Thickness 25.0 mm, Wavelength 460 nm
	98.7 % @Thickness 10.0 mm, Wavelength 420 nm
	99 % @Thickness 10.0 mm, Wavelength 436 nm
	99.1 % @Thickness 25.0 mm, Wavelength 500 nm
	99.3 % @Thickness 10.0 mm, Wavelength 460 nm
	99.4 % @Thickness 25.0 mm, Wavelength 620 nm
	99.4 % @Thickness 25.0 mm, Wavelength 580 nm
	99.4 % @Thickness 25.0 mm, Wavelength 546 nm
	99.5 % @Thickness 25.0 mm, Wavelength 660 nm
	99.6 % @Thickness 10.0 mm, Wavelength 500 nm
	99.6 % @Thickness 25.0 mm, Wavelength 700 nm
	99.8 % @Thickness 10.0 mm, Wavelength 700 nm
	99.8 % @Thickness 10.0 mm, Wavelength 660 nm
	99.8 % @Thickness 10.0 mm, Wavelength 620 nm
	99.8 % @Thickness 10.0 mm, Wavelength 546 nm
	99.8 % @Thickness 10.0 mm, Wavelength 580 nm
IR Transmittance	16 %
	48 % @Thickness 25.0 mm, Wavelength 1060 nm
	49 % @Thickness 25.0 mm, Wavelength 2500 nm
	75.2 % @Thickness 10.0 mm, Wavelength 2500 nm
	87 % @Thickness 25.0 mm, Wavelength 2325 nm
	94.6 % @Thickness 10.0 mm, Wavelength 2325 nm
	94.6 % @Thickness 10.0 mm, Wavelength 1970 nm
	97.6 % @Thickness 25.0 mm, Wavelength 1970 nm
	99 % @Thickness 10.0 mm, Wavelength 1530 nm
	99.6 % @Thickness 25.0 mm, Wavelength 1530 nm
	99.8 % @Thickness 10.0 mm, Wavelength 1060 nm
UV Transmittance	4.0 % @Wavelength 310 nm
	4.0 % @Wavelength 320 nm
	27.6 % @Wavelength 320 nm
	34 % @Wavelength 334 nm
	64 % @Wavelength 350 nm
	65 % @Wavelength 334 nm
	81 % @Wavelength 365 nm
	83.7 % @Wavelength 350 nm
	84.5 % @Wavelength 370 nm
	91.9 % @Wavelength 365 nm
	93.5 % @Wavelength 370 nm
	90 % @Thickness 25.0 mm, Wavelength 380 nm
	93 % @Thickness 25.0 mm, Wavelength 390 nm
	95 % @Thickness 25.0 mm, Wavelength 400 nm
	95.5 % @Thickness 25.0 mm, Wavelength 405 nm
	95.9 % @Thickness 10.0 mm, Wavelength 380 nm
	97.1 % @Thickness 10.0 mm, Wavelength 390 nm
	98 % @Thickness 10.0 mm, Wavelength 400 nm
	98.2 % @Thickness 10.0 mm, Wavelength 405 nm

Descriptive Properties
Acid resistance class	4	according to JOGIS
Grindability	67	according to JOGIS
Stress optical coefficient	2.26	[10^-6mm²/N]
Water resistance class	1	according to JOGIS
Yield point/sag temperature	546°C

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