Ohara S-LAL14 Optical Glass

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Ohara S-LAL14 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	3.70 g/cc

Chemical Properties	Original Value	Comments
Acid Class, SR	52.2

Mechanical Properties	Original Value	Comments
Hardness, Knoop	660 @Load 0.0999 kg
Modulus of Elasticity	111.8 GPa
Modulus of Rigidity	43.5 GPa
Poissons Ratio	0.284
Abrasion	81	Aa

Thermal Properties	Original Value	Comments
CTE, linear	5.70 µm/m-°C @Temperature -30.0 - 70.0 °C
	7.10 µm/m-°C @Temperature 100 - 300 °C
Thermal Conductivity	0.908 W/m-K @Temperature 35.0 °C
Transformation Temperature, Tg	650 °C	per thermal expansion curve
Softening Point	700 °C	10^7.65 poise; JIS-R3104 and ASTM-C338

Optical Properties	Original Value	Comments
Refractive Index	1.65820 @Wavelength 2325.42 nm
	1.66578 @Wavelength 1970.09 nm
	1.67369 @Wavelength 1529.58 nm
	1.68039 @Wavelength 1128.64 nm
	1.68252 @Wavelength 1013.98 nm	nt (Hg t line)
	1.68615 @Wavelength 852.11 nm	ns (Cs s line)
	1.68858 @Wavelength 768.19 nm	nA' (K A' line)
	1.69079 @Wavelength 706.52 nm	nr (He r line)
	1.69297 @Wavelength 656.27 nm	nC (H C line)
	1.69358 @Wavelength 643.85 nm	nC' (Cd C' line)
	1.69415 @Wavelength 632.8 nm	nHe-Ne
	1.69669 @Wavelength 589.29 nm	nD (Na D line)
	1.69680 @Wavelength 587.56 nm	nd (He D line)
	1.69979 @Wavelength 546.07 nm	ne (Hg e line)
	1.70552 @Wavelength 486.13 nm	nf (H F line)
	1.70624 @Wavelength 479.99 nm	nF' (Cd F' line)
	1.71144 @Wavelength 441.57 nm	nHe-Cd
	1.71234 @Wavelength 435.835 nm	ng (Hg g line)
	1.71800 @Wavelength 404.656 nm	nh (Hg h line)
	1.72767 @Wavelength 365.015 nm	ni (Hg i line)
Abbe Number	55.31	ν e
	55.53	ν d
Optical Dispersion	0.003823	nd-nC; Partial Dispersion
	0.004389	nC-nA'; Partial Dispersion
	0.005665	nh-ng; Partial Dispersion
	0.006205	ne-nC'; Partial Dispersion
	0.006448	nF'-ne; Partial Dispersion
	0.006814	ne-nC; Partial Dispersion
	0.006818	ng-nF; Partial Dispersion
	0.010452	nC-nt; Partial Dispersion
	0.011061	nC'-nt; Partial Dispersion
	0.012548	nF-nC
	0.012653	nF'-nC'
	0.015333	ni-ng; Partial Dispersion
	0.015543	ng-nd; Partial Dispersion
	0.021437	ni-nF'; Partial Dispersion
Transmission, Visible	95.9 % @Wavelength 380 nm
	97.4 % @Wavelength 390 nm
	98.2 % @Wavelength 400 nm
	99 % @Wavelength 420 nm
	99.3 % @Wavelength 440 nm
	99.5 % @Wavelength 460 nm
	99.7 % @Wavelength 480 nm
	99.7 % @Wavelength 600 nm
	99.7 % @Wavelength 650 nm
	99.8 % @Wavelength 500 nm
	99.8 % @Wavelength 550 nm
	99.8 % @Wavelength 700 nm
IR Transmittance	59 % @Wavelength 2400 nm
	86 % @Wavelength 2200 nm
	98.2 % @Wavelength 1800 nm
	99.1 % @Wavelength 1400 nm
	99.2 % @Wavelength 1600 nm
	99.8 % @Wavelength 800 nm
	99.8 % @Wavelength 900 nm
	99.8 % @Wavelength 1000 nm
	99.8 % @Wavelength 1200 nm
UV Transmittance	3.0 % @Wavelength 280 nm
	7.0 % @Wavelength 290 nm
	15 % @Wavelength 300 nm
	27 % @Wavelength 310 nm
	41 % @Wavelength 320 nm
	56 % @Wavelength 330 nm
	70 % @Wavelength 340 nm
	81 % @Wavelength 350 nm
	88 % @Wavelength 360 nm
	93.1 % @Wavelength 370 nm

Descriptive Properties
Acid Resistance, Powder Method, RAP)	5
CCI	0.00 B
	0.32 G
	0.32 R
coloring, λ 5	285
coloring, λ 80	365
Coloring, Internal Transmission λ 0.05	285
Coloring, Internal Transmission λ 0.80	349
Knoop Hardness Class	7
Melt Frequency	1
Ohara Code d	697555
Ohara Code e	700553
Ohara Status	Preferred
Phosphate Resistance, PR	3
Photoelastic Constant (ß)	1.86
Relative Price	5	S-BSL7 = 1
Water Resistance, RW(P)	1
Weathering Resistance (Surface Method) W(S)max	1
Weathering Resistance (Surface Method) W(S)min	2
Yield Point, At (°C)	668	per thermal expansion curve

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CZOHARA899 / 192164

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