Ohara S-TIH23 Optical Glass

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Ohara S-TIH23 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	3.30 g/cc

Chemical Properties	Original Value	Comments
Acid Class, SR	1.0

Mechanical Properties	Original Value	Comments
Hardness, Knoop	540 @Load 0.0999 kg
Modulus of Elasticity	92.2 GPa
Modulus of Rigidity	36.6 GPa
Poissons Ratio	0.26
Abrasion	180	Aa

Thermal Properties	Original Value	Comments
CTE, linear	8.80 µm/m-°C @Temperature -30.0 - 70.0 °C
	10.6 µm/m-°C @Temperature 100 - 300 °C
Thermal Conductivity	0.992 W/m-K @Temperature 35.0 °C
Transformation Temperature, Tg	604 °C	per thermal expansion curve
Softening Point	684 °C	10^7.65 poise; JIS-R3104 and ASTM-C338
Annealing Point	586 °C	10¹³ poise; ASTM-C336
Strain Point	561 °C	10^14.5 poise; JIS-R3103 and ASTM-C336

Optical Properties	Original Value	Comments
Refractive Index	1.73102 @Wavelength 2325.42 nm
	1.73732 @Wavelength 1970.09 nm
	1.74475 @Wavelength 1529.58 nm
	1.75284 @Wavelength 1128.64 nm
	1.75605 @Wavelength 1013.98 nm	nt (Hg t line)
	1.76230 @Wavelength 852.11 nm	ns (Cs s line)
	1.76697 @Wavelength 768.19 nm	nA' (K A' line)
	1.77147 @Wavelength 706.52 nm	nr (He r line)
	1.77613 @Wavelength 656.27 nm	nC (H C line)
	1.77746 @Wavelength 643.85 nm	nC' (Cd C' line)
	1.77871 @Wavelength 632.8 nm	nHe-Ne
	1.78444 @Wavelength 589.29 nm	nD (Na D line)
	1.78470 @Wavelength 587.56 nm	nd (He D line)
	1.79173 @Wavelength 546.07 nm	ne (Hg e line)
	1.80597 @Wavelength 486.13 nm	nf (H F line)
	1.80782 @Wavelength 479.99 nm	nF' (Cd F' line)
	1.82176 @Wavelength 441.57 nm	nHe-Cd
	1.82428 @Wavelength 435.835 nm	ng (Hg g line)
	1.84081 @Wavelength 404.656 nm	nh (Hg h line)
Abbe Number	26.08	ν e
	26.29	ν d
Optical Dispersion	0.008571	nd-nC; Partial Dispersion
	0.009156	nC-nA'; Partial Dispersion
	0.014272	ne-nC'; Partial Dispersion
	0.015605	ne-nC; Partial Dispersion
	0.016087	nF'-ne; Partial Dispersion
	0.016524	nh-ng; Partial Dispersion
	0.018312	ng-nF; Partial Dispersion
	0.020074	nC-nt; Partial Dispersion
	0.021407	nC'-nt; Partial Dispersion
	0.029847	nF-nC
	0.030359	nF'-nC'
	0.039588	ng-nd; Partial Dispersion
Transmission, Visible	44 % @Wavelength 380 nm
	67 % @Wavelength 390 nm
	80 % @Wavelength 400 nm
	90.6 % @Wavelength 420 nm
	94.7 % @Wavelength 440 nm
	96.2 % @Wavelength 460 nm
	97.2 % @Wavelength 480 nm
	97.9 % @Wavelength 500 nm
	99.1 % @Wavelength 650 nm
	99.2 % @Wavelength 550 nm
	99.2 % @Wavelength 600 nm
	99.3 % @Wavelength 700 nm
IR Transmittance	93.7 % @Wavelength 2400 nm
	96.2 % @Wavelength 2200 nm
	98.8 % @Wavelength 1800 nm
	99.6 % @Wavelength 1600 nm
	99.7 % @Wavelength 1400 nm
	99.8 % @Wavelength 800 nm
	99.8 % @Wavelength 900 nm
	99.8 % @Wavelength 1000 nm
	99.9 % @Wavelength 1200 nm
UV Transmittance	12 % @Wavelength 370 nm

Descriptive Properties
Acid Resistance, Powder Method, RAP)	1
CCI	0.00 B
	3.88 G
	3.88 R
coloring, λ 5	365
coloring, λ 80	435
Coloring, Internal Transmission λ 0.05	368
Coloring, Internal Transmission λ 0.80	400
Knoop Hardness Class	5
Melt Frequency	3
Ohara Code d	785263
Ohara Code e	792261
Ohara Status	Preferred
Phosphate Resistance, PR	1
Photoelastic Constant (ß)	2.69
Relative Price	4.5	S-BSL7 = 1
Water Resistance, RW(P)	2
Weathering Resistance (Surface Method) W(S)max	2
Yield Point, At (°C)	635	per thermal expansion curve

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CZOHARA947 / 192212

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