Ohara S-LAH65VS Optical Glass

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Ohara S-LAH65VS Optical Glass
Categories:	Ceramic; Glass; Optical
Material Notes:	Information provided by Ohara Corporation.
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Physical Properties	Metric	English	Comments

Specific Gravity	4.46 g/cc	4.46 g/cc

Chemical Properties	Metric	English	Comments
Acid Class, SR	4.0	4.0

Mechanical Properties	Metric	English	Comments
Hardness, Knoop	730 @Load 0.0999 kg	730 @Load 0.220 lb
Modulus of Elasticity	122.3 GPa	17740 ksi
Modulus of Rigidity	47.1 GPa	6830 ksi
Poissons Ratio	0.30	0.30
Abrasion	61	61	Aa

Thermal Properties	Metric	English	Comments
CTE, linear	6.10 µm/m-°C @Temperature -30.0 - 70.0 °C	3.39 µin/in-°F @Temperature -22.0 - 158 °F
	7.50 µm/m-°C @Temperature 100 - 300 °C	4.17 µin/in-°F @Temperature 212 - 572 °F
Thermal Conductivity	0.856 W/m-K @Temperature 35.0 °C	5.94 BTU-in/hr-ft²-°F @Temperature 95.0 °F
Transformation Temperature, Tg	691 °C	1280 °F	per thermal expansion curve
Softening Point	745 °C	1370 °F	10^7.65 poise; JIS-R3104 and ASTM-C338
Annealing Point	677 °C	1250 °F	10¹³ poise; ASTM-C336
Strain Point	648 °C	1200 °F	10^14.5 poise; JIS-R3103 and ASTM-C336

Optical Properties	Metric	English	Comments
Refractive Index	1.76127 @Wavelength 2325.42 nm	1.76127 @Wavelength 2325.42 nm
	1.76833 @Wavelength 1970.09 nm	1.76833 @Wavelength 1970.09 nm
	1.77597 @Wavelength 1529.58 nm	1.77597 @Wavelength 1529.58 nm
	1.78303 @Wavelength 1128.64 nm	1.78303 @Wavelength 1128.64 nm
	1.78548 @Wavelength 1013.98 nm	1.78548 @Wavelength 1013.98 nm	nt (Hg t line)
	1.78991 @Wavelength 852.11 nm	1.78991 @Wavelength 852.11 nm	ns (Cs s line)
	1.79302 @Wavelength 768.19 nm	1.79302 @Wavelength 768.19 nm	nA' (K A' line)
	1.7959 @Wavelength 706.52 nm	1.7959 @Wavelength 706.52 nm	nr (He r line)
	1.79882 @Wavelength 656.27 nm	1.79882 @Wavelength 656.27 nm	nC (H C line)
	1.79964 @Wavelength 643.85 nm	1.79964 @Wavelength 643.85 nm	nC' (Cd C' line)
	1.8004 @Wavelength 632.8 nm	1.8004 @Wavelength 632.8 nm	nHe-Ne
	1.80385 @Wavelength 589.29 nm	1.80385 @Wavelength 589.29 nm	nD
	1.804 @Wavelength 587.56 nm	1.804 @Wavelength 587.56 nm	nd (He D line)
	1.80811 @Wavelength 546.07 nm	1.80811 @Wavelength 546.07 nm	ne (Hg e line)
	1.8161 @Wavelength 486.13 nm	1.8161 @Wavelength 486.13 nm	nf (H F line)
	1.8171 @Wavelength 479.99 nm	1.8171 @Wavelength 479.99 nm	nF' (Cd F' line)
	1.82445 @Wavelength 441.57 nm	1.82445 @Wavelength 441.57 nm	nHe-Cd
	1.82573 @Wavelength 435.835 nm	1.82573 @Wavelength 435.835 nm	ng (Hg g line)
	1.83385 @Wavelength 404.656 nm	1.83385 @Wavelength 404.656 nm	nh (Hg h line)
	1.84792 @Wavelength 365.015 nm	1.84792 @Wavelength 365.015 nm	ni (Hg i line)
Abbe Number	46.28	46.28	ν e
	46.53	46.53	ν d
Optical Dispersion	0.005184	0.005184	nd-nC; Partial Dispersion
	0.005801	0.005801	nC-nA'; Partial Dispersion
	0.008114	0.008114	nh-ng; Partial Dispersion
	0.008476	0.008476	ne-nC'; Partial Dispersion
	0.008987	0.008987	nF'-ne; Partial Dispersion
	0.009296	0.009296	ne-nC; Partial Dispersion
	0.009637	0.009637	ng-nF; Partial Dispersion
	0.013334	0.013334	nC-nt; Partial Dispersion
	0.014154	0.014154	nC'-nt; Partial Dispersion
	0.017281	0.017281	nF-nC
	0.017463	0.017463	nF'-nC'
	0.021734	0.021734	ng-nd; Partial Dispersion
	0.022188	0.022188	ni-ng; Partial Dispersion
	0.030823	0.030823	ni-nF'; Partial Dispersion
Transmission, Visible	95.7 % @Thickness 10.0 mm, Wavelength 380 nm	95.7 % @Thickness 0.394 in, Wavelength 380 nm	Internal Transmission
	97.1 % @Thickness 10.0 mm, Wavelength 390 nm	97.1 % @Thickness 0.394 in, Wavelength 390 nm	Internal Transmission
	97.9 % @Thickness 10.0 mm, Wavelength 400 nm	97.9 % @Thickness 0.394 in, Wavelength 400 nm	Internal Transmission
	98.7 % @Thickness 10.0 mm, Wavelength 420 nm	98.7 % @Thickness 0.394 in, Wavelength 420 nm	Internal Transmission
	99.1 % @Thickness 10.0 mm, Wavelength 440 nm	99.1 % @Thickness 0.394 in, Wavelength 440 nm	Internal Transmission
	99.3 % @Thickness 10.0 mm, Wavelength 460 nm	99.3 % @Thickness 0.394 in, Wavelength 460 nm	Internal Transmission
	99.6 % @Thickness 10.0 mm, Wavelength 480 nm	99.6 % @Thickness 0.394 in, Wavelength 480 nm	Internal Transmission
	99.7 % @Thickness 10.0 mm, Wavelength 500 nm	99.7 % @Thickness 0.394 in, Wavelength 500 nm	Internal Transmission
	99.9 % @Thickness 10.0 mm, Wavelength 550 nm	99.9 % @Thickness 0.394 in, Wavelength 550 nm	Internal Transmission
	99.9 % @Thickness 10.0 mm, Wavelength 600 nm	99.9 % @Thickness 0.394 in, Wavelength 600 nm	Internal Transmission
	99.9 % @Thickness 10.0 mm, Wavelength 650 nm	99.9 % @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	72 % @Thickness 10.0 mm, Wavelength 2400 nm	72 % @Thickness 0.394 in, Wavelength 2400 nm	Internal Transmission
	91.6 % @Thickness 10.0 mm, Wavelength 2200 nm	91.6 % @Thickness 0.394 in, Wavelength 2200 nm	Internal Transmission
	96.8 % @Thickness 10.0 mm, Wavelength 2000 nm	96.8 % @Thickness 0.394 in, Wavelength 2000 nm	Internal Transmission
	98.9 % @Thickness 10.0 mm, Wavelength 1800 nm	98.9 % @Thickness 0.394 in, Wavelength 1800 nm	Internal Transmission
	99.6 % @Thickness 10.0 mm, Wavelength 1600 nm	99.6 % @Thickness 0.394 in, Wavelength 1600 nm	Internal Transmission
	99.8 % @Thickness 10.0 mm, Wavelength 1400 nm	99.8 % @Thickness 0.394 in, Wavelength 1400 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
UV Transmittance	5.0 % @Thickness 10.0 mm, Wavelength 310 nm	5.0 % @Thickness 0.394 in, Wavelength 310 nm	Internal Transmission
	25 % @Thickness 10.0 mm, Wavelength 320 nm	25 % @Thickness 0.394 in, Wavelength 320 nm	Internal Transmission
	53 % @Thickness 10.0 mm, Wavelength 330 nm	53 % @Thickness 0.394 in, Wavelength 330 nm	Internal Transmission
	72 % @Thickness 10.0 mm, Wavelength 340 nm	72 % @Thickness 0.394 in, Wavelength 340 nm	Internal Transmission
	83 % @Thickness 10.0 mm, Wavelength 350 nm	83 % @Thickness 0.394 in, Wavelength 350 nm	Internal Transmission
	89 % @Thickness 10.0 mm, Wavelength 360 nm	89 % @Thickness 0.394 in, Wavelength 360 nm	Internal Transmission
	93.4 % @Thickness 10.0 mm, Wavelength 370 nm	93.4 % @Thickness 0.394 in, Wavelength 370 nm	Internal Transmission

Descriptive Properties
Acid Resistance, Powder Method, RA(P)	3
CCI	0.00 B
	0.4 G
	0.4 R
coloring, λ 5	310
coloring, λ 80	380
Coloring, Internal Transmission λ 0.05	310
Coloring, Internal Transmission λ 0.80	347
Knoop Hardness Class	7
Ohara Code d	804465
Ohara Code e	808463
Phosphate Resistance, PR	1
Photoelastic Constant (ß)	1.27
Water Resistance, RW(P)	1
Weathering Resistance (Surface Method) W(S)max	2
Yield Point, At (°C)	720		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.

CZOHARA765 / 281604

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