Ohara S-LAL 7Q Optical Glass

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Ohara S-LAL 7Q Optical Glass
Categories:	Ceramic; Glass; Optical
Material Notes:	S-LAL7Q is an optical glass with improved chemical durability, specifically Acid and Water resistance, with improved polishing processability and the same Refractive Indices and Abbe Number as S-LAL7. These characteristics make it ideal for use in automotive applications, as well as Projectors, CCTV, FA / Machine Vision, Interchangeable Photographic and Broadcast lenses, and various others. Information provided by Ohara Corporation.
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Physical Properties	Original Value	Comments

Specific Gravity	3.24 g/cc

Chemical Properties	Original Value	Comments
Acid Class, SR	52

Mechanical Properties	Original Value	Comments
Hardness, Knoop	680 @Load 0.0999 kg
Modulus of Elasticity	110.8 GPa
Modulus of Rigidity	43.3 GPa
Poissons Ratio	0.28
Abrasion	75	Aa

Thermal Properties	Original Value	Comments
CTE, linear	5.50 µm/m-°C @Temperature -30.0 - 70.0 °C
	7.00 µm/m-°C @Temperature 100 - 300 °C
Thermal Conductivity	0.989 W/m-K @Temperature 35.0 °C
Transformation Temperature, Tg	620 °C	per thermal expansion curve
Softening Point	683 °C	10^7.65 poise; JIS-R3104 and ASTM-C338
Annealing Point	601 °C	10¹³ poise; ASTM-C336
Strain Point	580 °C	10^14.5 poise; JIS-R3103 and ASTM-C336

Optical Properties	Original Value	Comments
Refractive Index	1.61523 @Wavelength 2325.42 nm
	1.62265 @Wavelength 1970.09 nm
	1.63034 @Wavelength 1529.58 nm
	1.63671 @Wavelength 1128.64 nm
	1.6387 @Wavelength 1013.98 nm	nt (Hg t line)
	1.64204 @Wavelength 852.11 nm	ns (Cs s line)
	1.64425 @Wavelength 768.19 nm	nA' (K A' line)
	1.64624 @Wavelength 706.52 nm	nr (He r line)
	1.64819 @Wavelength 656.27 nm	nC (H C line)
	1.64874 @Wavelength 643.85 nm	nC' (Cd C' line)
	1.64924 @Wavelength 632.8 nm	nHe-Ne
	1.6515 @Wavelength 589.29 nm	nD
	1.6516 @Wavelength 587.56 nm	nd (He D line)
	1.65426 @Wavelength 546.07 nm	ne (Hg e line)
	1.65932 @Wavelength 486.13 nm	nf (H F line)
	1.65995 @Wavelength 479.99 nm	nF' (Cd F' line)
	1.66453 @Wavelength 441.57 nm	nHe-Cd
	1.66532 @Wavelength 435.835 nm	ng (Hg g line)
	1.67029 @Wavelength 404.656 nm	nh (Hg h line)
	1.67873 @Wavelength 365.015 nm	ni (Hg i line)
Abbe Number	58.34	ν e
	58.54	ν d
Optical Dispersion	0.003408	nd-nC; Partial Dispersion
	0.003943	nC-nA'; Partial Dispersion
	0.004966	nh-ng; Partial Dispersion
	0.005518	ne-nC'; Partial Dispersion
	0.005697	nF'-ne; Partial Dispersion
	0.005999	ng-nF; Partial Dispersion
	0.006063	ne-nC; Partial Dispersion
	0.009488	nC-nt; Partial Dispersion
	0.010033	nC'-nt; Partial Dispersion
	0.01113	nF-nC
	0.011215	nF'-nC'
	0.01341	ni-ng; Partial Dispersion
	0.013721	ng-nd; Partial Dispersion
	0.018779	ni-nF'; Partial Dispersion
Transmission, Visible	96 % @Thickness 10.0 mm, Wavelength 380 nm	Internal Transmission
	97.4 % @Thickness 10.0 mm, Wavelength 390 nm	Internal Transmission
	98.3 % @Thickness 10.0 mm, Wavelength 400 nm	Internal Transmission
	99 % @Thickness 10.0 mm, Wavelength 420 nm	Internal Transmission
	99.3 % @Thickness 10.0 mm, Wavelength 440 nm	Internal Transmission
	99.5 % @Thickness 10.0 mm, Wavelength 460 nm	Internal Transmission
	99.7 % @Thickness 10.0 mm, Wavelength 480 nm	Internal Transmission
	99.7 % @Thickness 10.0 mm, Wavelength 600 nm	Internal Transmission
	99.7 % @Thickness 10.0 mm, Wavelength 650 nm	Internal Transmission
	99.8 % @Thickness 10.0 mm, Wavelength 500 nm	Internal Transmission
	99.8 % @Thickness 10.0 mm, Wavelength 550 nm	Internal Transmission
	99.8 % @Thickness 10.0 mm, Wavelength 700 nm	Internal Transmission
IR Transmittance	59 % @Thickness 10.0 mm, Wavelength 2400 nm	Internal Transmission
	83 % @Thickness 10.0 mm, Wavelength 2200 nm	Internal Transmission
	94.8 % @Thickness 10.0 mm, Wavelength 2000 nm	Internal Transmission
	97.7 % @Thickness 10.0 mm, Wavelength 1800 nm	Internal Transmission
	98.4 % @Thickness 10.0 mm, Wavelength 1400 nm	Internal Transmission
	98.9 % @Thickness 10.0 mm, Wavelength 1600 nm	Internal Transmission
	99.8 % @Thickness 10.0 mm, Wavelength 800 nm	Internal Transmission
	99.8 % @Thickness 10.0 mm, Wavelength 900 nm	Internal Transmission
	99.8 % @Thickness 10.0 mm, Wavelength 1000 nm	Internal Transmission
	99.8 % @Thickness 10.0 mm, Wavelength 1200 nm	Internal Transmission
UV Transmittance	1.0 % @Thickness 10.0 mm, Wavelength 280 nm	Internal Transmission
	3.0 % @Thickness 10.0 mm, Wavelength 290 nm	Internal Transmission
	8.0 % @Thickness 10.0 mm, Wavelength 300 nm	Internal Transmission
	19 % @Thickness 10.0 mm, Wavelength 310 nm	Internal Transmission
	34 % @Thickness 10.0 mm, Wavelength 320 nm	Internal Transmission
	51 % @Thickness 10.0 mm, Wavelength 330 nm	Internal Transmission
	67 % @Thickness 10.0 mm, Wavelength 340 nm	Internal Transmission
	79 % @Thickness 10.0 mm, Wavelength 350 nm	Internal Transmission
	88 % @Thickness 10.0 mm, Wavelength 360 nm	Internal Transmission
	93 % @Thickness 10.0 mm, Wavelength 370 nm	Internal Transmission

Descriptive Properties
Acid Resistance, Powder Method, RA(P)	4
CCI	0.00 B
	0.32 G
	0.32 R
coloring, λ 80	365
Coloring, Internal Transmission λ 0.05	294
Coloring, Internal Transmission λ 0.80	351
Knoop Hardness Class	7
Ohara Code d	652585
Ohara Code e	654584
Phosphate Resistance, PR	4
Photoelastic Constant (ß)	1.98
Water Resistance, RW(P)	2
Weathering Resistance (Surface Method) W(S)max	3
Yield Point, At (°C)	646	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.

CZOHARA772 / 281611

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