Ohara S-LAH98 Optical Glass

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Ohara S-LAH98 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-LAH98 is an effective option for both cost reduction and higher performance. Information provided by Ohara Corporation.
Vendors:	No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
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Physical Properties	Original Value	Comments

Specific Gravity	4.94 g/cc

Chemical Properties	Original Value	Comments
Acid Class, SR	3.0

Mechanical Properties	Original Value	Comments
Hardness, Knoop	650 @Load 0.0999 kg
Modulus of Elasticity	129.3 GPa
Modulus of Rigidity	49.5 GPa
Poissons Ratio	0.306
Abrasion	55	Aa

Thermal Properties	Original Value	Comments
CTE, linear	7.30 µm/m-°C @Temperature -30.0 - 70.0 °C
	8.70 µm/m-°C @Temperature 100 - 300 °C
Thermal Conductivity	0.924 W/m-K @Temperature 35.0 °C
Transformation Temperature, Tg	723 °C	per thermal expansion curve
Softening Point	791 °C	10^7.65 poise; JIS-R3104 and ASTM-C338
Annealing Point	716 °C	10¹³ poise; ASTM-C336
Strain Point	680 °C	10^14.5 poise; JIS-R3103 and ASTM-C336

Optical Properties	Original Value	Comments
Refractive Index	1.89737 @Wavelength 2325.42 nm
	1.90436 @Wavelength 1970.09 nm
	1.9125 @Wavelength 1529.58 nm
	1.92115 @Wavelength 1128.64 nm
	1.92452 @Wavelength 1013.98 nm	nt (Hg t line)
	1.93102 @Wavelength 852.11 nm	ns (Cs s line)
	1.93582 @Wavelength 768.19 nm	nA' (K A' line)
	1.94042 @Wavelength 706.52 nm	nr (He r line)
	1.94514 @Wavelength 656.27 nm	nC (H C line)
	1.94649 @Wavelength 643.85 nm	nC' (Cd C' line)
	1.94775 @Wavelength 632.8 nm	nHe-Ne
	1.95349 @Wavelength 589.29 nm	nD
	1.95375 @Wavelength 587.56 nm	nd (He D line)
	1.96073 @Wavelength 546.07 nm	ne (Hg e line)
	1.97465 @Wavelength 486.13 nm	nf (H F line)
	1.97643 @Wavelength 479.99 nm	nF' (Cd F' line)
	1.9897 @Wavelength 441.57 nm	nHe-Cd
	1.99207 @Wavelength 435.835 nm	ng (Hg g line)
	2.00732 @Wavelength 404.656 nm	nh (Hg h line)
Abbe Number	32.09	ν e
	32.32	ν d
Optical Dispersion	0.008609	nd-nC; Partial Dispersion
	0.009319	nC-nA'; Partial Dispersion
	0.014247	ne-nC'; Partial Dispersion
	0.015249	nh-ng; Partial Dispersion
	0.015592	ne-nC; Partial Dispersion
	0.015693	nF'-ne; Partial Dispersion
	0.017423	ng-nF; Partial Dispersion
	0.02062	nC-nt; Partial Dispersion
	0.021965	nC'-nt; Partial Dispersion
	0.029506	nF-nC
	0.02994	nF'-nC'
	0.03832	ng-nd; Partial Dispersion
Transmission, Visible	68 % @Thickness 10.0 mm, Wavelength 380 nm	Internal Transmission
	80 % @Thickness 10.0 mm, Wavelength 390 nm	Internal Transmission
	86 % @Thickness 10.0 mm, Wavelength 400 nm	Internal Transmission
	92.7 % @Thickness 10.0 mm, Wavelength 420 nm	Internal Transmission
	95.3 % @Thickness 10.0 mm, Wavelength 440 nm	Internal Transmission
	96.7 % @Thickness 10.0 mm, Wavelength 460 nm	Internal Transmission
	97.8 % @Thickness 10.0 mm, Wavelength 480 nm	Internal Transmission
	98.6 % @Thickness 10.0 mm, Wavelength 500 nm	Internal Transmission
	99.6 % @Thickness 10.0 mm, Wavelength 550 nm	Internal Transmission
	99.8 % @Thickness 10.0 mm, Wavelength 600 nm	Internal Transmission
	99.8 % @Thickness 10.0 mm, Wavelength 650 nm	Internal Transmission
	99.9 % @Thickness 10.0 mm, Wavelength 700 nm	Internal Transmission
IR Transmittance	84 % @Thickness 10.0 mm, Wavelength 2400 nm	Internal Transmission
	95.2 % @Thickness 10.0 mm, Wavelength 2200 nm	Internal Transmission
	97.9 % @Thickness 10.0 mm, Wavelength 2000 nm	Internal Transmission
	99.3 % @Thickness 10.0 mm, Wavelength 1800 nm	Internal Transmission
	99.8 % @Thickness 10.0 mm, Wavelength 1600 nm	Internal Transmission
	99.9 % @Thickness 10.0 mm, Wavelength 800 nm	Internal Transmission
	99.9 % @Thickness 10.0 mm, Wavelength 900 nm	Internal Transmission
	99.9 % @Thickness 10.0 mm, Wavelength 1000 nm	Internal Transmission
	99.9 % @Thickness 10.0 mm, Wavelength 1200 nm	Internal Transmission
	99.9 % @Thickness 10.0 mm, Wavelength 1400 nm	Internal Transmission
UV Transmittance	2.0 % @Thickness 10.0 mm, Wavelength 350 nm	Internal Transmission
	18 % @Thickness 10.0 mm, Wavelength 360 nm	Internal Transmission
	47 % @Thickness 10.0 mm, Wavelength 370 nm	Internal Transmission

Descriptive Properties
Acid Resistance, Powder Method, RA(P)	1
CCI	0.00 B
	2.9 G
	2.9 R
coloring, λ 5	355
coloring, λ 70	405
Coloring, Internal Transmission λ 0.05	352
Coloring, Internal Transmission λ 0.80	390
Knoop Hardness Class	7
Ohara Code d	954323
Ohara Code e	961321
Phosphate Resistance, PR	1
Photoelastic Constant (ß)	0.86
Water Resistance, RW(P)	1
Weathering Resistance (Surface Method) W(S)max	1
Yield Point, At (°C)	757	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 go back to viewing the property data in MatWeb's normal format.

CZOHARA770 / 281609

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