Ohara S-LAH99 Optical Glass

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Ohara S-LAH99 Optical Glass
Categories:	Ceramic; Glass; Optical
Material Notes:	This material can be used for a variety of uses such as interchangeable photographic lenses, projectors, and various other applications. S-LAH99 is an effective option for both cost reduction and higher performance. Information provided by Ohara Corporation.
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Physical Properties	Metric	English	Comments

Specific Gravity	5.02 g/cc	5.02 g/cc

Chemical Properties	Metric	English	Comments
Acid Class, SR	2.0	2.0

Mechanical Properties	Metric	English	Comments
Hardness, Knoop	650 @Load 0.0999 kg	650 @Load 0.220 lb
Modulus of Elasticity	131.3 GPa	19040 ksi
Modulus of Rigidity	50.2 GPa	7280 ksi
Poissons Ratio	0.307	0.307
Abrasion	55	55	Aa

Thermal Properties	Metric	English	Comments
CTE, linear	7.50 µm/m-°C @Temperature -30.0 - 70.0 °C	4.17 µin/in-°F @Temperature -22.0 - 158 °F
	8.80 µm/m-°C @Temperature 100 - 300 °C	4.89 µin/in-°F @Temperature 212 - 572 °F
Thermal Conductivity	0.944 W/m-K @Temperature 35.0 °C	6.55 BTU-in/hr-ft²-°F @Temperature 95.0 °F
Transformation Temperature, Tg	725 °C	1340 °F	per thermal expansion curve
Softening Point	792 °C	1460 °F	10^7.65 poise; JIS-R3104 and ASTM-C338
Annealing Point	718 °C	1320 °F	10¹³ poise; ASTM-C336
Strain Point	682 °C	1260 °F	10^14.5 poise; JIS-R3103 and ASTM-C336

Optical Properties	Metric	English	Comments
Refractive Index	1.93863 @Wavelength 2325.42 nm	1.93863 @Wavelength 2325.42 nm
	1.94585 @Wavelength 1970.09 nm	1.94585 @Wavelength 1970.09 nm
	1.9544 @Wavelength 1529.58 nm	1.9544 @Wavelength 1529.58 nm
	1.9638 @Wavelength 1128.64 nm	1.9638 @Wavelength 1128.64 nm
	1.96756 @Wavelength 1013.98 nm	1.96756 @Wavelength 1013.98 nm	nt (Hg t line)
	1.97488 @Wavelength 852.11 nm	1.97488 @Wavelength 852.11 nm	ns (Cs s line)
	1.98035 @Wavelength 768.19 nm	1.98035 @Wavelength 768.19 nm	nA' (K A' line)
	1.98561 @Wavelength 706.52 nm	1.98561 @Wavelength 706.52 nm	nr (He r line)
	1.99105 @Wavelength 656.27 nm	1.99105 @Wavelength 656.27 nm	nC (H C line)
	1.9926 @Wavelength 643.85 nm	1.9926 @Wavelength 643.85 nm	nC' (Cd C' line)
	1.99406 @Wavelength 632.8 nm	1.99406 @Wavelength 632.8 nm	nHe-Ne
	2.0007 @Wavelength 589.29 nm	2.0007 @Wavelength 589.29 nm	nD
	2.001 @Wavelength 587.56 nm	2.001 @Wavelength 587.56 nm	nd (He D line)
	2.00912 @Wavelength 546.07 nm	2.00912 @Wavelength 546.07 nm	ne (Hg e line)
	2.0254 @Wavelength 486.13 nm	2.0254 @Wavelength 486.13 nm	nf (H F line)
	2.02749 @Wavelength 479.99 nm	2.02749 @Wavelength 479.99 nm	nF' (Cd F' line)
	2.04319 @Wavelength 441.57 nm	2.04319 @Wavelength 441.57 nm	nHe-Cd
	2.046 @Wavelength 435.835 nm	2.046 @Wavelength 435.835 nm	ng (Hg g line)
	2.06424 @Wavelength 404.656 nm	2.06424 @Wavelength 404.656 nm	nh (Hg h line)
Abbe Number	28.92	28.92	ν e
	29.14	29.14	ν d
Optical Dispersion	0.009952	0.009952	nd-nC; Partial Dispersion
	0.010695	0.010695	nC-nA'; Partial Dispersion
	0.016519	0.016519	ne-nC'; Partial Dispersion
	0.01807	0.01807	ne-nC; Partial Dispersion
	0.018235	0.018235	nh-ng; Partial Dispersion
	0.018376	0.018376	nF'-ne; Partial Dispersion
	0.020601	0.020601	ng-nF; Partial Dispersion
	0.02349	0.02349	nC-nt; Partial Dispersion
	0.025041	0.025041	nC'-nt; Partial Dispersion
	0.034352	0.034352	nF-nC
	0.034895	0.034895	nF'-nC'
	0.045001	0.045001	ng-nd; Partial Dispersion
Transmission, Visible	49 % @Thickness 10.0 mm, Wavelength 380 nm	49 % @Thickness 0.394 in, Wavelength 380 nm	Internal Transmission
	66 % @Thickness 10.0 mm, Wavelength 390 nm	66 % @Thickness 0.394 in, Wavelength 390 nm	Internal Transmission
	76 % @Thickness 10.0 mm, Wavelength 400 nm	76 % @Thickness 0.394 in, Wavelength 400 nm	Internal Transmission
	87 % @Thickness 10.0 mm, Wavelength 420 nm	87 % @Thickness 0.394 in, Wavelength 420 nm	Internal Transmission
	92.4 % @Thickness 10.0 mm, Wavelength 440 nm	92.4 % @Thickness 0.394 in, Wavelength 440 nm	Internal Transmission
	95.1 % @Thickness 10.0 mm, Wavelength 460 nm	95.1 % @Thickness 0.394 in, Wavelength 460 nm	Internal Transmission
	96.8 % @Thickness 10.0 mm, Wavelength 480 nm	96.8 % @Thickness 0.394 in, Wavelength 480 nm	Internal Transmission
	98 % @Thickness 10.0 mm, Wavelength 500 nm	98 % @Thickness 0.394 in, Wavelength 500 nm	Internal Transmission
	99.5 % @Thickness 10.0 mm, Wavelength 550 nm	99.5 % @Thickness 0.394 in, Wavelength 550 nm	Internal Transmission
	99.8 % @Thickness 10.0 mm, Wavelength 600 nm	99.8 % @Thickness 0.394 in, Wavelength 600 nm	Internal Transmission
	99.8 % @Thickness 10.0 mm, Wavelength 650 nm	99.8 % @Thickness 0.394 in, Wavelength 650 nm	Internal Transmission
	99.9 % @Thickness 10.0 mm, Wavelength 700 nm	99.9 % @Thickness 0.394 in, Wavelength 700 nm	Internal Transmission
IR Transmittance	88 % @Thickness 10.0 mm, Wavelength 2400 nm	88 % @Thickness 0.394 in, Wavelength 2400 nm	Internal Transmission
	96.4 % @Thickness 10.0 mm, Wavelength 2200 nm	96.4 % @Thickness 0.394 in, Wavelength 2200 nm	Internal Transmission
	98.3 % @Thickness 10.0 mm, Wavelength 2000 nm	98.3 % @Thickness 0.394 in, Wavelength 2000 nm	Internal Transmission
	99.5 % @Thickness 10.0 mm, Wavelength 1800 nm	99.5 % @Thickness 0.394 in, Wavelength 1800 nm	Internal Transmission
	99.8 % @Thickness 10.0 mm, Wavelength 1600 nm	99.8 % @Thickness 0.394 in, Wavelength 1600 nm	Internal Transmission
	99.9 % @Thickness 10.0 mm, Wavelength 800 nm	99.9 % @Thickness 0.394 in, Wavelength 800 nm	Internal Transmission
	99.9 % @Thickness 10.0 mm, Wavelength 900 nm	99.9 % @Thickness 0.394 in, Wavelength 900 nm	Internal Transmission
	99.9 % @Thickness 10.0 mm, Wavelength 1000 nm	99.9 % @Thickness 0.394 in, Wavelength 1000 nm	Internal Transmission
	99.9 % @Thickness 10.0 mm, Wavelength 1200 nm	99.9 % @Thickness 0.394 in, Wavelength 1200 nm	Internal Transmission
	99.9 % @Thickness 10.0 mm, Wavelength 1400 nm	99.9 % @Thickness 0.394 in, Wavelength 1400 nm	Internal Transmission
UV Transmittance	5.0 % @Thickness 10.0 mm, Wavelength 360 nm	5.0 % @Thickness 0.394 in, Wavelength 360 nm	Internal Transmission
	25 % @Thickness 10.0 mm, Wavelength 370 nm	25 % @Thickness 0.394 in, Wavelength 370 nm	Internal Transmission

Descriptive Properties
Acid Resistance, Powder Method, RA(P)	1
CCI	0.00 B
	5 G
	5 R
coloring, λ 5	360
coloring, λ 70	425
Coloring, Internal Transmission λ 0.05	360
Coloring, Internal Transmission λ 0.80	407
Knoop Hardness Class	7
Ohara Code d	001291
Ohara Code e	009289
Phosphate Resistance, PR	1
Photoelastic Constant (ß)	0.76
Water Resistance, RW(P)	1
Weathering Resistance (Surface Method) W(S)max	1
Yield Point, At (°C)	761		per thermal expansion curve

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.

CZOHARA771 / 281610

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