Ohara S-LAH89 Optical Glass

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Ohara S-LAH89 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	Metric	English	Comments

Specific Gravity	4.70 g/cc	4.70 g/cc

Chemical Properties	Metric	English	Comments
Acid Class, SR	4.0	4.0

Mechanical Properties	Metric	English	Comments
Hardness, Knoop	660 @Load 0.0999 kg	660 @Load 0.220 lb
Modulus of Elasticity	120.8 GPa	17520 ksi
Modulus of Rigidity	46.3 GPa	6720 ksi
Poissons Ratio	0.303	0.303
Abrasion	70	70	Aa

Thermal Properties	Metric	English	Comments
CTE, linear	6.80 µm/m-°C @Temperature -30.0 - 70.0 °C	3.78 µin/in-°F @Temperature -22.0 - 158 °F
	8.00 µm/m-°C @Temperature 100 - 300 °C	4.44 µin/in-°F @Temperature 212 - 572 °F
Thermal Conductivity	0.861 W/m-K @Temperature 35.0 °C	5.98 BTU-in/hr-ft²-°F @Temperature 95.0 °F
Transformation Temperature, Tg	669 °C	1240 °F	per thermal expansion curve
Softening Point	743 °C	1370 °F	10^7.65 poise; JIS-R3104 and ASTM-C338
Annealing Point	660 °C	1220 °F	10¹³ poise; ASTM-C336
Strain Point	634 °C	1170 °F	10^14.5 poise; JIS-R3103 and ASTM-C336

Optical Properties	Metric	English	Comments
Refractive Index	1.80561 @Wavelength 2325.42 nm	1.80561 @Wavelength 2325.42 nm
	1.81233 @Wavelength 1970.09 nm	1.81233 @Wavelength 1970.09 nm
	1.81983 @Wavelength 1529.58 nm	1.81983 @Wavelength 1529.58 nm
	1.82718 @Wavelength 1128.64 nm	1.82718 @Wavelength 1128.64 nm
	1.82987 @Wavelength 1013.98 nm	1.82987 @Wavelength 1013.98 nm	nt (Hg t line)
	1.83487 @Wavelength 852.11 nm	1.83487 @Wavelength 852.11 nm	ns (Cs s line)
	1.83847 @Wavelength 768.19 nm	1.83847 @Wavelength 768.19 nm	nA' (K A' line)
	1.84186 @Wavelength 706.52 nm	1.84186 @Wavelength 706.52 nm	nr (He r line)
	1.84530 @Wavelength 656.27 nm	1.84530 @Wavelength 656.27 nm	nC (H C line)
	1.84628 @Wavelength 643.85 nm	1.84628 @Wavelength 643.85 nm	nC' (Cd C' line)
	1.84719 @Wavelength 632.8 nm	1.84719 @Wavelength 632.8 nm	nHe-Ne
	1.85132 @Wavelength 589.29 nm	1.85132 @Wavelength 589.29 nm	nD (Na D line)
	1.85150 @Wavelength 587.56 nm	1.85150 @Wavelength 587.56 nm	nd (He D line)
	1.85646 @Wavelength 546.07 nm	1.85646 @Wavelength 546.07 nm	ne (Hg e line)
	1.86618 @Wavelength 486.13 nm	1.86618 @Wavelength 486.13 nm	nf (H F line)
	1.86741 @Wavelength 479.99 nm	1.86741 @Wavelength 479.99 nm	nF' (Cd F' line)
	1.87648 @Wavelength 441.57 nm	1.87648 @Wavelength 441.57 nm	nHe-Cd
	1.87807 @Wavelength 435.835 nm	1.87807 @Wavelength 435.835 nm	ng (Hg g line)
	1.88822 @Wavelength 404.656 nm	1.88822 @Wavelength 404.656 nm	nh (Hg h line)
Abbe Number	40.53	40.53	ν e
	40.78	40.78	ν d
Optical Dispersion	0.006196	0.006196	nd-nC; Partial Dispersion
	0.006834	0.006834	nC-nA'; Partial Dispersion
	0.010143	0.010143	nh-ng; Partial Dispersion
	0.010181	0.010181	ne-nC'; Partial Dispersion
	0.010953	0.010953	nF'-ne; Partial Dispersion
	0.011156	0.011156	ne-nC; Partial Dispersion
	0.011891	0.011891	ng-nF; Partial Dispersion
	0.015434	0.015434	nC-nt; Partial Dispersion
	0.016409	0.016409	nC'-nt; Partial Dispersion
	0.02088	0.02088	nF-nC
	0.021134	0.021134	nF'-nC'
	0.026575	0.026575	ng-nd; Partial Dispersion
Transmission, Visible	84 % @Wavelength 380 nm	84 % @Wavelength 380 nm
	89 % @Wavelength 390 nm	89 % @Wavelength 390 nm
	93 % @Wavelength 400 nm	93 % @Wavelength 400 nm
	96.2 % @Wavelength 420 nm	96.2 % @Wavelength 420 nm
	97.5 % @Wavelength 440 nm	97.5 % @Wavelength 440 nm
	98.3 % @Wavelength 460 nm	98.3 % @Wavelength 460 nm
	98.9 % @Wavelength 480 nm	98.9 % @Wavelength 480 nm
	99.3 % @Wavelength 500 nm	99.3 % @Wavelength 500 nm
	99.8 % @Wavelength 550 nm	99.8 % @Wavelength 550 nm
	99.8 % @Wavelength 650 nm	99.8 % @Wavelength 650 nm
	99.9 % @Wavelength 600 nm	99.9 % @Wavelength 600 nm
	99.9 % @Wavelength 700 nm	99.9 % @Wavelength 700 nm
IR Transmittance	78 % @Wavelength 2400 nm	78 % @Wavelength 2400 nm
	93.8 % @Wavelength 2200 nm	93.8 % @Wavelength 2200 nm
	99.2 % @Wavelength 1800 nm	99.2 % @Wavelength 1800 nm
	99.7 % @Wavelength 1600 nm	99.7 % @Wavelength 1600 nm
	99.8 % @Wavelength 1400 nm	99.8 % @Wavelength 1400 nm
	99.9 % @Wavelength 800 nm	99.9 % @Wavelength 800 nm
	99.9 % @Wavelength 900 nm	99.9 % @Wavelength 900 nm
	99.9 % @Wavelength 1000 nm	99.9 % @Wavelength 1000 nm
	99.9 % @Wavelength 1200 nm	99.9 % @Wavelength 1200 nm
UV Transmittance	7.0 % @Wavelength 340 nm	7.0 % @Wavelength 340 nm
	31 % @Wavelength 350 nm	31 % @Wavelength 350 nm
	57 % @Wavelength 360 nm	57 % @Wavelength 360 nm
	74 % @Wavelength 370 nm	74 % @Wavelength 370 nm

Descriptive Properties
Acid Resistance, Powder Method, RAP)	3
CCI	0.00 B
	1.47 G
	1.47 R
coloring, λ 5	340
coloring, λ 70	380
Coloring, Internal Transmission λ 0.05	339
Coloring, Internal Transmission λ 0.80	376
Knoop Hardness Class	7
Melt Frequency	5
Ohara Code d	852408
Ohara Code e	856405
Ohara Status	Standard
Phosphate Resistance, PR	1
Photoelastic Constant (ß)	1.27
Relative Price	6.5		S-BSL7 = 1
Water Resistance, RW(P)	1
Weathering Resistance (Surface Method) W(S)max	2
Yield Point, At (°C)	702		per thermal expansion curve

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CZOHARA891 / 192156

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