Ohara S-LAH60 Optical Glass

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Ohara S-LAH60 Optical Glass
Categories:	Ceramic; Glass; Optical
Material Notes:	ECO optical glass that does not contain any lead or arsenic. Information provided by Ohara Corporation.
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Physical Properties	Original Value	Comments

Specific Gravity	4.43 g/cc

Chemical Properties	Original Value	Comments
Acid Class, SR	4.2

Mechanical Properties	Original Value	Comments
Hardness, Knoop	670 @Load 0.0999 kg
Modulus of Elasticity	124.8 GPa
Modulus of Rigidity	48.1 GPa
Poissons Ratio	0.296
Abrasion	78	Aa

Thermal Properties	Original Value	Comments
CTE, linear	5.60 µm/m-°C @Temperature -30.0 - 70.0 °C
	7.10 µm/m-°C @Temperature 100 - 300 °C
Thermal Conductivity	0.872 W/m-K @Temperature 35.0 °C
Transformation Temperature, Tg	612 °C	per thermal expansion curve
Softening Point	676 °C	10^7.65 poise; JIS-R3104 and ASTM-C338

Optical Properties	Original Value	Comments
Refractive Index	1.78473 @Wavelength 2325.42 nm
	1.79205 @Wavelength 1970.09 nm
	1.80018 @Wavelength 1529.58 nm
	1.80807 @Wavelength 1128.64 nm
	1.81094 @Wavelength 1013.98 nm	nt (Hg t line)
	1.81627 @Wavelength 852.11 nm	ns (Cs s line)
	1.82009 @Wavelength 768.19 nm	nA' (K A' line)
	1.82370 @Wavelength 706.52 nm	nr (He r line)
	1.82738 @Wavelength 656.27 nm	nC (H C line)
	1.82842 @Wavelength 643.85 nm	nC' (Cd C' line)
	1.82939 @Wavelength 632.8 nm	nHe-Ne
	1.83380 @Wavelength 589.29 nm	nD (Na D line)
	1.83400 @Wavelength 587.56 nm	nd (He D line)
	1.83932 @Wavelength 546.07 nm	ne (Hg e line)
	1.84982 @Wavelength 486.13 nm	nf (H F line)
	1.85115 @Wavelength 479.99 nm	nF' (Cd F' line)
	1.86103 @Wavelength 441.57 nm	nHe-Cd
	1.86278 @Wavelength 435.835 nm	ng (Hg g line)
	1.87396 @Wavelength 404.656 nm	nh (Hg h line)
	1.89403 @Wavelength 365.015 nm	ni (Hg i line)
Abbe Number	36.92	ν e
	37.16	ν d
Optical Dispersion	0.006624	nd-nC; Partial Dispersion
	0.007283	nC-nA'; Partial Dispersion
	0.010907	ne-nC'; Partial Dispersion
	0.011183	nh-ng; Partial Dispersion
	0.011829	nF'-ne; Partial Dispersion
	0.011947	ne-nC; Partial Dispersion
	0.012962	ng-nF; Partial Dispersion
	0.016437	nC-nt; Partial Dispersion
	0.017477	nC'-nt; Partial Dispersion
	0.022443	nF-nC
	0.022736	nF'-nC'
	0.028781	ng-nd; Partial Dispersion
	0.031249	ni-ng; Partial Dispersion
	0.042878	ni-nF'; Partial Dispersion
Transmission, Visible	83 % @Wavelength 380 nm
	88 % @Wavelength 390 nm
	92.4 % @Wavelength 400 nm
	95.7 % @Wavelength 420 nm
	97.2 % @Wavelength 440 nm
	98 % @Wavelength 460 nm
	98.6 % @Wavelength 480 nm
	99 % @Wavelength 500 nm
	99.6 % @Wavelength 550 nm
	99.7 % @Wavelength 600 nm
	99.7 % @Wavelength 650 nm
	99.8 % @Wavelength 700 nm
IR Transmittance	72 % @Wavelength 2400 nm
	90.6 % @Wavelength 2200 nm
	98.4 % @Wavelength 1800 nm
	99.2 % @Wavelength 1600 nm
	99.3 % @Wavelength 1400 nm
	99.6 % @Wavelength 1200 nm
	99.7 % @Wavelength 1000 nm
	99.8 % @Wavelength 900 nm
	99.9 % @Wavelength 800 nm
UV Transmittance	3.0 % @Wavelength 340 nm
	27 % @Wavelength 350 nm
	54 % @Wavelength 360 nm
	72 % @Wavelength 370 nm

Descriptive Properties
Acid Resistance, Powder Method, RAP)	3
CCI	0.00 B
	1.57 G
	1.57 R
coloring, λ 5	340
coloring, λ 80	420
Coloring, Internal Transmission λ 0.05	341
Coloring, Internal Transmission λ 0.80	377
Knoop Hardness Class	7
Melt Frequency	1
Ohara Code d	834372
Ohara Code e	839369
Ohara Status	Preferred
Phosphate Resistance, PR	1
Photoelastic Constant (ß)	2.15
Relative Price	7	S-BSL7 = 1
Water Resistance, RW(P)	1
Weathering Resistance (Surface Method) W(S)max	1
Yield Point, At (°C)	632	per thermal expansion curve

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