Ohara S-TIH 3 Optical Glass

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Ohara S-TIH 3 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	3.11 g/cc

Chemical Properties	Original Value	Comments
Acid Class, SR	1.0

Mechanical Properties	Original Value	Comments
Hardness, Knoop	560 @Load 0.0999 kg
Modulus of Elasticity	90.8 GPa
Modulus of Rigidity	36.2 GPa
Poissons Ratio	0.254
Abrasion	165	Aa

Thermal Properties	Original Value	Comments
CTE, linear	8.50 µm/m-°C @Temperature -30.0 - 70.0 °C
	10.0 µm/m-°C @Temperature 100 - 300 °C
Thermal Conductivity	1.027 W/m-K @Temperature 35.0 °C
Transformation Temperature, Tg	615 °C	per thermal expansion curve
Softening Point	723 °C	10^7.65 poise; JIS-R3104 and ASTM-C338
Annealing Point	591 °C	10¹³ poise; ASTM-C336
Strain Point	566 °C	10^14.5 poise; JIS-R3103 and ASTM-C336

Optical Properties	Original Value	Comments
Refractive Index	1.69065 @Wavelength 2325.42 nm
	1.69685 @Wavelength 1970.09 nm
	1.70405 @Wavelength 1529.58 nm
	1.71162 @Wavelength 1128.64 nm
	1.71455 @Wavelength 1013.98 nm	nt (Hg t line)
	1.72018 @Wavelength 852.11 nm	ns (Cs s line)
	1.72434 @Wavelength 768.19 nm	nA' (K A' line)
	1.72833 @Wavelength 706.52 nm	nr (He r line)
	1.73245 @Wavelength 656.27 nm	nC (H C line)
	1.73363 @Wavelength 643.85 nm	nC' (Cd C' line)
	1.73474 @Wavelength 632.8 nm	nHe-Ne
	1.73977 @Wavelength 589.29 nm	nD (Na D line)
	1.74000 @Wavelength 587.56 nm	nd (He D line)
	1.74617 @Wavelength 546.07 nm	ne (Hg e line)
	1.75861 @Wavelength 486.13 nm	nf (H F line)
	1.76021 @Wavelength 479.99 nm	nF' (Cd F' line)
	1.77232 @Wavelength 441.57 nm	nHe-Cd
	1.77450 @Wavelength 435.835 nm	ng (Hg g line)
	1.78876 @Wavelength 404.656 nm	nh (Hg h line)
Abbe Number	28.07	ν e
	28.3	ν d
Optical Dispersion	0.007545	nd-nC; Partial Dispersion
	0.008108	nC-nA'; Partial Dispersion
	0.012539	ne-nC'; Partial Dispersion
	0.013714	ne-nC; Partial Dispersion
	0.014045	nF'-ne; Partial Dispersion
	0.014254	nh-ng; Partial Dispersion
	0.015897	ng-nF; Partial Dispersion
	0.0179	nC-nt; Partial Dispersion
	0.019075	nC'-nt; Partial Dispersion
	0.026152	nF-nC
	0.026584	nF'-nC'
	0.034504	ng-nd; Partial Dispersion
Transmission, Visible	51 % @Wavelength 380 nm
	74 % @Wavelength 390 nm
	85 % @Wavelength 400 nm
	94 % @Wavelength 420 nm
	96.4 % @Wavelength 440 nm
	97.5 % @Wavelength 460 nm
	98.1 % @Wavelength 480 nm
	98.6 % @Wavelength 500 nm
	99.3 % @Wavelength 650 nm
	99.4 % @Wavelength 550 nm
	99.4 % @Wavelength 600 nm
	99.5 % @Wavelength 700 nm
IR Transmittance	93.3 % @Wavelength 2400 nm
	95.5 % @Wavelength 2200 nm
	98.8 % @Wavelength 1800 nm
	99.6 % @Wavelength 1600 nm
	99.7 % @Wavelength 1400 nm
	99.9 % @Wavelength 800 nm
	99.9 % @Wavelength 900 nm
	99.9 % @Wavelength 1000 nm
	99.9 % @Wavelength 1200 nm
UV Transmittance	16 % @Wavelength 370 nm

Descriptive Properties
Acid Resistance, Powder Method, RAP)	1
CCI	0.00 B
	2.81 G
	2.81 R
coloring, λ 5	360
coloring, λ 80	420
Coloring, Internal Transmission λ 0.05	367
Coloring, Internal Transmission λ 0.80	395
Knoop Hardness Class	6
Melt Frequency	2
Ohara Code d	740283
Ohara Code e	746281
Ohara Status	Preferred
Phosphate Resistance, PR	1
Photoelastic Constant (ß)	2.81
Relative Price	4	S-BSL7 = 1
Water Resistance, RW(P)	1
Weathering Resistance (Surface Method) W(S)max	1
Yield Point, At (°C)	644	per thermal expansion curve

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