Schott LAK9G15 691548.353, Optical Glass

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Schott LAK9G15 691548.353, Optical Glass
Categories:	Ceramic; Glass; Optical
Material Notes:	Information provided by SCHOTT.
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Physical Properties	Metric	English	Comments

Density	3.53 g/cc	0.128 lb/in³

Chemical Properties	Metric	English	Comments
Acid Class, SR	53	53
Alkali Class, AR	1.3	1.3
Stain Resistance Class, FR	2.0	2.0

Mechanical Properties	Metric	English	Comments
Hardness, Knoop	721	721	HK (0.1/20)
Modulus of Elasticity	108 GPa	15700 ksi
Poissons Ratio	0.288	0.288
Shear Modulus	41.9 GPa	6080 ksi	Calculated

Thermal Properties	Metric	English	Comments
CTE, linear	6.30 µm/m-°C @Temperature -30.0 - 70.0 °C	3.50 µin/in-°F @Temperature -22.0 - 158 °F
	7.60 µm/m-°C @Temperature 20.0 - 300 °C	4.22 µin/in-°F @Temperature 68.0 - 572 °F
Specific Heat Capacity	0.660 J/g-°C	0.158 BTU/lb-°F
Thermal Conductivity	0.880 W/m-K	6.11 BTU-in/hr-ft²-°F
Transformation Temperature, Tg	634 °C	1170 °F
Softening Point	710 °C	1310 °F	viscosity of 10^7.6 cP
Annealing Point	635 °C	1180 °F	viscosity of 10¹³ cP

Optical Properties	Metric	English	Comments
Refractive Index	1.653 @Wavelength 2325.4 nm	1.653 @Wavelength 2325.4 nm
	1.66 @Wavelength 1970.1 nm	1.66 @Wavelength 1970.1 nm
	1.667 @Wavelength 1529.6 nm	1.667 @Wavelength 1529.6 nm
	1.673 @Wavelength 1014 nm	1.673 @Wavelength 1014 nm
	1.675 @Wavelength 1060 nm	1.675 @Wavelength 1060 nm
	1.679 @Wavelength 852.1 nm	1.679 @Wavelength 852.1 nm
	1.684 @Wavelength 706.5 nm	1.684 @Wavelength 706.5 nm
	1.686 @Wavelength 656.3 nm	1.686 @Wavelength 656.3 nm
	1.687 @Wavelength 632.8 nm	1.687 @Wavelength 632.8 nm
	1.687 @Wavelength 643.8 nm	1.687 @Wavelength 643.8 nm
	1.69 @Wavelength 589.3 nm	1.69 @Wavelength 589.3 nm
	1.69 @Wavelength 587.6 nm	1.69 @Wavelength 587.6 nm
	1.693 @Wavelength 546.1 nm	1.693 @Wavelength 546.1 nm
	1.699 @Wavelength 486.1 nm	1.699 @Wavelength 486.1 nm
	1.70 @Wavelength 480 nm	1.70 @Wavelength 480 nm
	1.706 @Wavelength 435.8 nm	1.706 @Wavelength 435.8 nm
	1.712 @Wavelength 404.7 nm	1.712 @Wavelength 404.7 nm
Abbe Number	54.53	54.53	ve
	54.76	54.76	vd
Optical Dispersion	0.012612	0.012612	nf - nc
	0.012721	0.012721	nf' - nc'
Transmission, Visible	32 % @Thickness 25.0 mm, Wavelength 420 nm	32 % @Thickness 0.984 in, Wavelength 420 nm
	57 % @Thickness 25.0 mm, Wavelength 436 nm	57 % @Thickness 0.984 in, Wavelength 436 nm
	63.4 % @Thickness 10.0 mm, Wavelength 420 nm	63.4 % @Thickness 0.394 in, Wavelength 420 nm
	79.9 % @Thickness 10.0 mm, Wavelength 436 nm	79.9 % @Thickness 0.394 in, Wavelength 436 nm
	81 % @Thickness 25.0 mm, Wavelength 460 nm	81 % @Thickness 0.984 in, Wavelength 460 nm
	91.9 % @Thickness 10.0 mm, Wavelength 460 nm	91.9 % @Thickness 0.394 in, Wavelength 460 nm
	93 % @Thickness 25.0 mm, Wavelength 500 nm	93 % @Thickness 0.984 in, Wavelength 500 nm
	96.4 % @Thickness 25.0 mm, Wavelength 546 nm	96.4 % @Thickness 0.984 in, Wavelength 546 nm
	97.1 % @Thickness 10.0 mm, Wavelength 500 nm	97.1 % @Thickness 0.394 in, Wavelength 500 nm
	97.3 % @Thickness 25.0 mm, Wavelength 580 nm	97.3 % @Thickness 0.984 in, Wavelength 580 nm
	97.8 % @Thickness 25.0 mm, Wavelength 620 nm	97.8 % @Thickness 0.984 in, Wavelength 620 nm
	98.2 % @Thickness 25.0 mm, Wavelength 660 nm	98.2 % @Thickness 0.984 in, Wavelength 660 nm
	98.5 % @Thickness 10.0 mm, Wavelength 546 nm	98.5 % @Thickness 0.394 in, Wavelength 546 nm
	98.6 % @Thickness 25.0 mm, Wavelength 700 nm	98.6 % @Thickness 0.984 in, Wavelength 700 nm
	98.9 % @Thickness 10.0 mm, Wavelength 580 nm	98.9 % @Thickness 0.394 in, Wavelength 580 nm
	99.1 % @Thickness 10.0 mm, Wavelength 620 nm	99.1 % @Thickness 0.394 in, Wavelength 620 nm
	99.3 % @Thickness 10.0 mm, Wavelength 660 nm	99.3 % @Thickness 0.394 in, Wavelength 660 nm
	99.4 % @Thickness 10.0 mm, Wavelength 700 nm	99.4 % @Thickness 0.394 in, Wavelength 700 nm
IR Transmittance	16 % @Thickness 25.0 mm, Wavelength 2500 nm	16 % @Thickness 0.984 in, Wavelength 2500 nm
	48 % @Thickness 10.0 mm, Wavelength 2500 nm	48 % @Thickness 0.394 in, Wavelength 2500 nm
	49 % @Thickness 25.0 mm, Wavelength 2325 nm	49 % @Thickness 0.984 in, Wavelength 2325 nm
	75.2 % @Thickness 10.0 mm, Wavelength 2325 nm	75.2 % @Thickness 0.394 in, Wavelength 2325 nm
	91 % @Thickness 25.0 mm, Wavelength 1970 nm	91 % @Thickness 0.984 in, Wavelength 1970 nm
	96.3 % @Thickness 10.0 mm, Wavelength 1970 nm	96.3 % @Thickness 0.394 in, Wavelength 1970 nm
	98.7 % @Thickness 25.0 mm, Wavelength 1530 nm	98.7 % @Thickness 0.984 in, Wavelength 1530 nm
	99.5 % @Thickness 10.0 mm, Wavelength 1530 nm	99.5 % @Thickness 0.394 in, Wavelength 1530 nm
	99.6 % @Thickness 25.0 mm, Wavelength 1060 nm	99.6 % @Thickness 0.984 in, Wavelength 1060 nm
	99.8 % @Thickness 10.0 mm, Wavelength 1060 nm	99.8 % @Thickness 0.394 in, Wavelength 1060 nm
UV Transmittance	1.0 % @Thickness 25.0 mm, Wavelength 390 nm	1.0 % @Thickness 0.984 in, Wavelength 390 nm
	2.6 % @Thickness 10.0 mm, Wavelength 380 nm	2.6 % @Thickness 0.394 in, Wavelength 380 nm
	4.0 % @Thickness 25.0 mm, Wavelength 400 nm	4.0 % @Thickness 0.984 in, Wavelength 400 nm
	9.0 % @Thickness 25.0 mm, Wavelength 405 nm	9.0 % @Thickness 0.984 in, Wavelength 405 nm
	12.3 % @Thickness 10.0 mm, Wavelength 390 nm	12.3 % @Thickness 0.394 in, Wavelength 390 nm
	29.2 % @Thickness 10.0 mm, Wavelength 400 nm	29.2 % @Thickness 0.394 in, Wavelength 400 nm
	38.2 % @Thickness 10.0 mm, Wavelength 405 nm	38.2 % @Thickness 0.394 in, Wavelength 405 nm

Descriptive Properties
Climatic resistance	2
Phosphate resistance	4.3
Stress optical coefficient	1.86		[10^-6mm²/N]

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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