Ohara S-TIM28 Optical Glass

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Ohara S-TIM28 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	2.98 g/cc

Chemical Properties	Original Value	Comments
Acid Class, SR	1.0

Mechanical Properties	Original Value	Comments
Hardness, Knoop	550 @Load 0.0999 kg
Modulus of Elasticity	85.5 GPa
Modulus of Rigidity	34.4 GPa
Poissons Ratio	0.242
Abrasion	155	Aa

Thermal Properties	Original Value	Comments
CTE, linear	8.20 µm/m-°C @Temperature -30.0 - 70.0 °C
	9.80 µm/m-°C @Temperature 100 - 300 °C
Thermal Conductivity	1.006 W/m-K @Temperature 35.0 °C
Transformation Temperature, Tg	611 °C	per thermal expansion curve
Softening Point	701 °C	10^7.65 poise; JIS-R3104 and ASTM-C338
Annealing Point	588 °C	10¹³ poise; ASTM-C336
Strain Point	560 °C	10^14.5 poise; JIS-R3103 and ASTM-C336

Optical Properties	Original Value	Comments
Refractive Index	1.64463 @Wavelength 2325.42 nm
	1.65062 @Wavelength 1970.09 nm
	1.65745 @Wavelength 1529.58 nm
	1.66438 @Wavelength 1128.64 nm
	1.66699 @Wavelength 1013.98 nm	nt (Hg t line)
	1.67192 @Wavelength 852.11 nm	ns (Cs s line)
	1.67553 @Wavelength 768.19 nm	nA' (K A' line)
	1.67896 @Wavelength 706.52 nm	nr (He r line)
	1.68250 @Wavelength 656.27 nm	nC (H C line)
	1.68350 @Wavelength 643.85 nm	nC' (Cd C' line)
	1.68445 @Wavelength 632.8 nm	nHe-Ne
	1.68874 @Wavelength 589.29 nm	nD (Na D line)
	1.68893 @Wavelength 587.56 nm	nd (He D line)
	1.69417 @Wavelength 546.07 nm	ne (Hg e line)
	1.70467 @Wavelength 486.13 nm	nf (H F line)
	1.70602 @Wavelength 479.99 nm	nF' (Cd F' line)
	1.71615 @Wavelength 441.57 nm	nHe-Cd
	1.71797 @Wavelength 435.835 nm	ng (Hg g line)
	1.72981 @Wavelength 404.656 nm	nh (Hg h line)
Abbe Number	30.83	ν e
	31.07	ν d
Optical Dispersion	0.006436	nd-nC; Partial Dispersion
	0.006966	nC-nA'; Partial Dispersion
	0.010667	ne-nC'; Partial Dispersion
	0.011672	ne-nC; Partial Dispersion
	0.011834	nh-ng; Partial Dispersion
	0.011849	nF'-ne; Partial Dispersion
	0.01331	ng-nF; Partial Dispersion
	0.015507	nC-nt; Partial Dispersion
	0.016512	nC'-nt; Partial Dispersion
	0.02217	nF-nC
	0.022516	nF'-nC'
	0.029044	ng-nd; Partial Dispersion
Transmission, Visible	58 % @Wavelength 380 nm
	79 % @Wavelength 390 nm
	88 % @Wavelength 400 nm
	95.1 % @Wavelength 420 nm
	97 % @Wavelength 440 nm
	97.8 % @Wavelength 460 nm
	98.3 % @Wavelength 480 nm
	98.7 % @Wavelength 500 nm
	99.4 % @Wavelength 550 nm
	99.4 % @Wavelength 650 nm
	99.5 % @Wavelength 600 nm
	99.5 % @Wavelength 700 nm
IR Transmittance	94.8 % @Wavelength 2400 nm
	96.1 % @Wavelength 2200 nm
	98.9 % @Wavelength 1800 nm
	99.6 % @Wavelength 1400 nm
	99.6 % @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	1.0 % @Wavelength 360 nm
	23 % @Wavelength 370 nm

Descriptive Properties
Acid Resistance, Powder Method, RAP)	1
CCI	0.00 B
	2.3 G
	2.3 R
coloring, λ 5	360
coloring, λ 80	405
Coloring, Internal Transmission λ 0.05	362
Coloring, Internal Transmission λ 0.80	391
Knoop Hardness Class	6
Melt Frequency	1
Ohara Code d	689311
Ohara Code e	694308
Ohara Status	Preferred
Phosphate Resistance, PR	1
Photoelastic Constant (ß)	2.77
Relative Price	3.5	S-BSL7 = 1
Water Resistance, RW(P)	2
Weathering Resistance (Surface Method) W(S)max	1
Yield Point, At (°C)	637	per thermal expansion curve

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CZOHARA964 / 192229

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