Ohara S-LAH60MQ Optical Glass

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Ohara S-LAH60MQ Optical Glass
Categories:	Ceramic; Glass; Optical
Material Notes:	S-LAH60MQ is an optical glass with smallest dn/dT among current LAH glass types and high refractive indices. Since cars are used in environments where the temperature range can vary widely from below zero in colder climates to more than 50°C inside a car on a summer day, this can cause large refractive index fluctuations within the optical system. While a zoom lens can adjust for these refractive index fluctuations, fixed focused lenses are the most common within the field of Automotive cameras and the necessary adjustments would be nearly impossible. S-LAH60MQ has almost zero dn/dT, unlike many LAH glasses which have large positive dn/dT. This makes S-LAH60MQ an excellent choice not only for automotive applications, but also Projectors, Interchangeable Photographic lenses, and various other applications. Information provided by Ohara Corporation.
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Physical Properties	Metric	English	Comments

Specific Gravity	4.71 g/cc	4.71 g/cc

Chemical Properties	Metric	English	Comments
Acid Class, SR	51.2	51.2

Mechanical Properties	Metric	English	Comments
Hardness, Knoop	520 @Load 0.0999 kg	520 @Load 0.220 lb
Modulus of Elasticity	95.3 GPa	13800 ksi
Modulus of Rigidity	36.6 GPa	5310 ksi
Poissons Ratio	0.302	0.302
Abrasion	160	160	Aa

Thermal Properties	Metric	English	Comments
CTE, linear	8.50 µm/m-°C @Temperature -30.0 - 70.0 °C	4.72 µin/in-°F @Temperature -22.0 - 158 °F
	9.80 µm/m-°C @Temperature 100 - 300 °C	5.44 µin/in-°F @Temperature 212 - 572 °F
Thermal Conductivity	0.701 W/m-K @Temperature 35.0 °C	4.86 BTU-in/hr-ft²-°F @Temperature 95.0 °F
Transformation Temperature, Tg	655 °C	1210 °F	per thermal expansion curve
Softening Point	721 °C	1330 °F	10^7.65 poise; JIS-R3104 and ASTM-C338
Annealing Point	635 °C	1180 °F	10¹³ poise; ASTM-C336
Strain Point	609 °C	1130 °F	10^14.5 poise; JIS-R3103 and ASTM-C336

Optical Properties	Metric	English	Comments
Refractive Index	1.7881 @Wavelength 2325.42 nm	1.7881 @Wavelength 2325.42 nm
	1.7943 @Wavelength 1970.09 nm	1.7943 @Wavelength 1970.09 nm
	1.80135 @Wavelength 1529.58 nm	1.80135 @Wavelength 1529.58 nm
	1.80854 @Wavelength 1128.64 nm	1.80854 @Wavelength 1128.64 nm
	1.81125 @Wavelength 1013.98 nm	1.81125 @Wavelength 1013.98 nm	nt (Hg t line)
	1.81641 @Wavelength 852.11 nm	1.81641 @Wavelength 852.11 nm	ns (Cs s line)
	1.82017 @Wavelength 768.19 nm	1.82017 @Wavelength 768.19 nm	nA' (K A' line)
	1.82374 @Wavelength 706.52 nm	1.82374 @Wavelength 706.52 nm	nr (He r line)
	1.82739 @Wavelength 656.27 nm	1.82739 @Wavelength 656.27 nm	nC (H C line)
	1.82843 @Wavelength 643.85 nm	1.82843 @Wavelength 643.85 nm	nC' (Cd C' line)
	1.8294 @Wavelength 632.8 nm	1.8294 @Wavelength 632.8 nm	nHe-Ne
	1.8338 @Wavelength 589.29 nm	1.8338 @Wavelength 589.29 nm	nD
	1.834 @Wavelength 587.56 nm	1.834 @Wavelength 587.56 nm	nd (He D line)
	1.83932 @Wavelength 546.07 nm	1.83932 @Wavelength 546.07 nm	ne (Hg e line)
	1.84983 @Wavelength 486.13 nm	1.84983 @Wavelength 486.13 nm	nf (H F line)
	1.85116 @Wavelength 479.99 nm	1.85116 @Wavelength 479.99 nm	nF' (Cd F' line)
	1.86106 @Wavelength 441.57 nm	1.86106 @Wavelength 441.57 nm	nHe-Cd
	1.86281 @Wavelength 435.835 nm	1.86281 @Wavelength 435.835 nm	ng (Hg g line)
	1.87401 @Wavelength 404.656 nm	1.87401 @Wavelength 404.656 nm	nh (Hg h line)
	1.89407 @Wavelength 365.015 nm	1.89407 @Wavelength 365.015 nm	ni (Hg i line)
Abbe Number	36.92	36.92	ν e
	37.17	37.17	ν d
Optical Dispersion	0.006608	0.006608	nd-nC; Partial Dispersion
	0.007222	0.007222	nC-nA'; Partial Dispersion
	0.010892	0.010892	ne-nC'; Partial Dispersion
	0.011196	0.011196	nh-ng; Partial Dispersion
	0.011843	0.011843	nF'-ne; Partial Dispersion
	0.011929	0.011929	ne-nC; Partial Dispersion
	0.012981	0.012981	ng-nF; Partial Dispersion
	0.016137	0.016137	nC-nt; Partial Dispersion
	0.017174	0.017174	nC'-nt; Partial Dispersion
	0.022437	0.022437	nF-nC
	0.022735	0.022735	nF'-nC'
	0.02881	0.02881	ng-nd; Partial Dispersion
	0.031262	0.031262	ni-ng; Partial Dispersion
	0.042908	0.042908	ni-nF'; Partial Dispersion
Transmission, Visible	83 % @Thickness 10.0 mm, Wavelength 380 nm	83 % @Thickness 0.394 in, Wavelength 380 nm	Internal Transmission
	89 % @Thickness 10.0 mm, Wavelength 390 nm	89 % @Thickness 0.394 in, Wavelength 390 nm	Internal Transmission
	92.7 % @Thickness 10.0 mm, Wavelength 400 nm	92.7 % @Thickness 0.394 in, Wavelength 400 nm	Internal Transmission
	95.7 % @Thickness 10.0 mm, Wavelength 420 nm	95.7 % @Thickness 0.394 in, Wavelength 420 nm	Internal Transmission
	96.8 % @Thickness 10.0 mm, Wavelength 440 nm	96.8 % @Thickness 0.394 in, Wavelength 440 nm	Internal Transmission
	97.6 % @Thickness 10.0 mm, Wavelength 460 nm	97.6 % @Thickness 0.394 in, Wavelength 460 nm	Internal Transmission
	98.3 % @Thickness 10.0 mm, Wavelength 480 nm	98.3 % @Thickness 0.394 in, Wavelength 480 nm	Internal Transmission
	98.9 % @Thickness 10.0 mm, Wavelength 500 nm	98.9 % @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
	99.5 % @Thickness 10.0 mm, Wavelength 600 nm	99.5 % @Thickness 0.394 in, Wavelength 600 nm	Internal Transmission
	99.5 % @Thickness 10.0 mm, Wavelength 650 nm	99.5 % @Thickness 0.394 in, Wavelength 650 nm	Internal Transmission
	99.7 % @Thickness 10.0 mm, Wavelength 700 nm	99.7 % @Thickness 0.394 in, Wavelength 700 nm	Internal Transmission
IR Transmittance	80 % @Thickness 10.0 mm, Wavelength 2400 nm	80 % @Thickness 0.394 in, Wavelength 2400 nm	Internal Transmission
	92.7 % @Thickness 10.0 mm, Wavelength 2200 nm	92.7 % @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
	98.6 % @Thickness 10.0 mm, Wavelength 1800 nm	98.6 % @Thickness 0.394 in, Wavelength 1800 nm	Internal Transmission
	99.5 % @Thickness 10.0 mm, Wavelength 1600 nm	99.5 % @Thickness 0.394 in, Wavelength 1600 nm	Internal Transmission
	99.8 % @Thickness 10.0 mm, Wavelength 800 nm	99.8 % @Thickness 0.394 in, Wavelength 800 nm	Internal Transmission
	99.8 % @Thickness 10.0 mm, Wavelength 900 nm	99.8 % @Thickness 0.394 in, Wavelength 900 nm	Internal Transmission
	99.8 % @Thickness 10.0 mm, Wavelength 1000 nm	99.8 % @Thickness 0.394 in, Wavelength 1000 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 1200 nm	99.9 % @Thickness 0.394 in, Wavelength 1200 nm	Internal Transmission
UV Transmittance	8.0 % @Thickness 10.0 mm, Wavelength 340 nm	8.0 % @Thickness 0.394 in, Wavelength 340 nm	Internal Transmission
	31 % @Thickness 10.0 mm, Wavelength 350 nm	31 % @Thickness 0.394 in, Wavelength 350 nm	Internal Transmission
	56 % @Thickness 10.0 mm, Wavelength 360 nm	56 % @Thickness 0.394 in, Wavelength 360 nm	Internal Transmission
	73 % @Thickness 10.0 mm, Wavelength 370 nm	73 % @Thickness 0.394 in, Wavelength 370 nm	Internal Transmission

Descriptive Properties
Acid Resistance, Powder Method, RA(P)	3
CCI	0.00 B
	1.58 G
	1.58 R
coloring, λ 5	340
coloring, λ 80	425
Coloring, Internal Transmission λ 0.05	336
Coloring, Internal Transmission λ 0.80	377
Knoop Hardness Class	5
Ohara Code d	834372
Ohara Code e	839369
Phosphate Resistance, PR	1.2
Photoelastic Constant (ß)	1.36
Water Resistance, RW(P)	1
Weathering Resistance (Surface Method) W(S)max	3
Yield Point, At (°C)	688		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.

CZOHARA762 / 281601

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