Ohara S-BAL14 Optical Glass

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Ohara S-BAL14 Optical Glass
Categories:	Ceramic; Glass; Optical
Material Notes:	Boron is an important constituent. 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	2.89 g/cc	2.89 g/cc

Chemical Properties	Metric	English	Comments
Acid Class, SR	1.0	1.0

Mechanical Properties	Metric	English	Comments
Hardness, Knoop	570 @Load 0.0999 kg	570 @Load 0.220 lb
Modulus of Elasticity	81.1 GPa	11800 ksi
Modulus of Rigidity	32.7 GPa	4740 ksi
Poissons Ratio	0.24	0.24
Abrasion	134	134	Aa

Thermal Properties	Metric	English	Comments
CTE, linear	8.00 µm/m-°C @Temperature -30.0 - 70.0 °C	4.44 µin/in-°F @Temperature -22.0 - 158 °F
	9.30 µm/m-°C @Temperature 100 - 300 °C	5.17 µin/in-°F @Temperature 212 - 572 °F
Thermal Conductivity	0.967 W/m-K @Temperature 35.0 °C	6.71 BTU-in/hr-ft²-°F @Temperature 95.0 °F
Transformation Temperature, Tg	580 °C	1080 °F	per thermal expansion curve
Softening Point	700 °C	1290 °F	10^7.65 poise; JIS-R3104 and ASTM-C338
Annealing Point	562 °C	1040 °F	10¹³ poise; ASTM-C336
Strain Point	533 °C	991 °F	10^14.5 poise; JIS-R3103 and ASTM-C336

Optical Properties	Metric	English	Comments
Refractive Index	1.54050 @Wavelength 2325.42 nm	1.54050 @Wavelength 2325.42 nm
	1.54565 @Wavelength 1970.09 nm	1.54565 @Wavelength 1970.09 nm
	1.55116 @Wavelength 1529.58 nm	1.55116 @Wavelength 1529.58 nm
	1.55601 @Wavelength 1128.64 nm	1.55601 @Wavelength 1128.64 nm
	1.55761 @Wavelength 1013.98 nm	1.55761 @Wavelength 1013.98 nm	nt (Hg t line)
	1.56040 @Wavelength 852.11 nm	1.56040 @Wavelength 852.11 nm	ns (Cs s line)
	1.56230 @Wavelength 768.19 nm	1.56230 @Wavelength 768.19 nm	nA' (K A' line)
	1.56404 @Wavelength 706.52 nm	1.56404 @Wavelength 706.52 nm	nr (He r line)
	1.56577 @Wavelength 656.27 nm	1.56577 @Wavelength 656.27 nm	nC (H C line)
	1.56626 @Wavelength 643.85 nm	1.56626 @Wavelength 643.85 nm	nC' (Cd C' line)
	1.56671 @Wavelength 632.8 nm	1.56671 @Wavelength 632.8 nm	nHe-Ne
	1.56874 @Wavelength 589.29 nm	1.56874 @Wavelength 589.29 nm	nD (Na D line)
	1.56883 @Wavelength 587.56 nm	1.56883 @Wavelength 587.56 nm	nd (He D line)
	1.57124 @Wavelength 546.07 nm	1.57124 @Wavelength 546.07 nm	ne (Hg e line)
	1.57587 @Wavelength 486.13 nm	1.57587 @Wavelength 486.13 nm	nf (H F line)
	1.57645 @Wavelength 479.99 nm	1.57645 @Wavelength 479.99 nm	nF' (Cd F' line)
	1.58067 @Wavelength 441.57 nm	1.58067 @Wavelength 441.57 nm	nHe-Cd
	1.58141 @Wavelength 435.835 nm	1.58141 @Wavelength 435.835 nm	ng (Hg g line)
	1.58604 @Wavelength 404.656 nm	1.58604 @Wavelength 404.656 nm	nh (Hg h line)
	1.59400 @Wavelength 365.015 nm	1.59400 @Wavelength 365.015 nm	ni (Hg i line)
Abbe Number	56.09	56.09	ν e
	56.36	56.36	ν d
Optical Dispersion	0.003057	0.003057	nd-nC; Partial Dispersion
	0.003476	0.003476	nC-nA'; Partial Dispersion
	0.004629	0.004629	nh-ng; Partial Dispersion
	0.004976	0.004976	ne-nC'; Partial Dispersion
	0.005209	0.005209	nF'-ne; Partial Dispersion
	0.005462	0.005462	ne-nC; Partial Dispersion
	0.005539	0.005539	ng-nF; Partial Dispersion
	0.008164	0.008164	nC-nt; Partial Dispersion
	0.00865	0.00865	nC'-nt; Partial Dispersion
	0.010092	0.010092	nF-nC
	0.010185	0.010185	nF'-nC'
	0.012574	0.012574	ng-nd; Partial Dispersion
	0.012595	0.012595	ni-ng; Partial Dispersion
	0.017555	0.017555	ni-nF'; Partial Dispersion
Transmission, Visible	97 % @Wavelength 380 nm	97 % @Wavelength 380 nm
	98.3 % @Wavelength 390 nm	98.3 % @Wavelength 390 nm
	98.9 % @Wavelength 400 nm	98.9 % @Wavelength 400 nm
	99.2 % @Wavelength 420 nm	99.2 % @Wavelength 420 nm
	99.3 % @Wavelength 440 nm	99.3 % @Wavelength 440 nm
	99.4 % @Wavelength 460 nm	99.4 % @Wavelength 460 nm
	99.5 % @Wavelength 480 nm	99.5 % @Wavelength 480 nm
	99.7 % @Wavelength 500 nm	99.7 % @Wavelength 500 nm
	99.7 % @Wavelength 650 nm	99.7 % @Wavelength 650 nm
	99.8 % @Wavelength 550 nm	99.8 % @Wavelength 550 nm
	99.8 % @Wavelength 600 nm	99.8 % @Wavelength 600 nm
	99.8 % @Wavelength 700 nm	99.8 % @Wavelength 700 nm
IR Transmittance	86 % @Wavelength 2400 nm	86 % @Wavelength 2400 nm
	91.4 % @Wavelength 2200 nm	91.4 % @Wavelength 2200 nm
	98.3 % @Wavelength 1800 nm	98.3 % @Wavelength 1800 nm
	98.9 % @Wavelength 1400 nm	98.9 % @Wavelength 1400 nm
	99.3 % @Wavelength 1600 nm	99.3 % @Wavelength 1600 nm
	99.7 % @Wavelength 1000 nm	99.7 % @Wavelength 1000 nm
	99.7 % @Wavelength 1200 nm	99.7 % @Wavelength 1200 nm
	99.8 % @Wavelength 800 nm	99.8 % @Wavelength 800 nm
	99.8 % @Wavelength 900 nm	99.8 % @Wavelength 900 nm
UV Transmittance	9.0 % @Wavelength 330 nm	9.0 % @Wavelength 330 nm
	44 % @Wavelength 340 nm	44 % @Wavelength 340 nm
	74 % @Wavelength 350 nm	74 % @Wavelength 350 nm
	88 % @Wavelength 360 nm	88 % @Wavelength 360 nm
	94.6 % @Wavelength 370 nm	94.6 % @Wavelength 370 nm

Descriptive Properties
Acid Resistance, Powder Method, RAP)	1
CCI	0.00 B
	0.26 G
	0.26 R
coloring, λ 5	325
coloring, λ 80	360
Coloring, Internal Transmission λ 0.05	329
Coloring, Internal Transmission λ 0.80	354
Knoop Hardness Class	6
Melt Frequency	1
Ohara Code d	569563
Ohara Code e	571561
Ohara Status	Preferred
Phosphate Resistance, PR	2
Photoelastic Constant (ß)	2.32
Relative Price	2.5		S-BSL7 = 1
Water Resistance, RW(P)	3
Weathering Resistance (Surface Method) W(S)max	2
Weathering Resistance (Surface Method) W(S)min	3
Yield Point, At (°C)	622		per thermal expansion curve

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