Ohara S-FPM 2 Optical Glass

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Ohara S-FPM 2 Optical Glass
Categories:	Ceramic; Glass; Optical
Material Notes:	Information provided by Ohara Corporation.
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Physical Properties	Metric	English	Comments

Specific Gravity	4.17 g/cc	4.17 g/cc

Chemical Properties	Metric	English	Comments
Acid Class, SR	51.3	51.3

Mechanical Properties	Metric	English	Comments
Hardness, Knoop	390 @Load 0.0999 kg	390 @Load 0.220 lb
Modulus of Elasticity	75.7 GPa	11000 ksi
Modulus of Rigidity	29.4 GPa	4260 ksi
Poissons Ratio	0.287	0.287
Abrasion	521	521	Aa

Thermal Properties	Metric	English	Comments
CTE, linear	11.7 µm/m-°C @Temperature -30.0 - 70.0 °C	6.50 µin/in-°F @Temperature -22.0 - 158 °F
	13.5 µm/m-°C @Temperature 100 - 300 °C	7.50 µin/in-°F @Temperature 212 - 572 °F
Thermal Conductivity	0.624 W/m-K @Temperature 35.0 °C	4.33 BTU-in/hr-ft²-°F @Temperature 95.0 °F
Transformation Temperature, Tg	571 °C	1060 °F	per thermal expansion curve

Optical Properties	Metric	English	Comments
Refractive Index	1.57252 @Wavelength 2325.42 nm	1.57252 @Wavelength 2325.42 nm
	1.57631 @Wavelength 1970.09 nm	1.57631 @Wavelength 1970.09 nm
	1.58045 @Wavelength 1529.58 nm	1.58045 @Wavelength 1529.58 nm
	1.58426 @Wavelength 1128.64 nm	1.58426 @Wavelength 1128.64 nm
	1.58557 @Wavelength 1013.98 nm	1.58557 @Wavelength 1013.98 nm	nt (Hg t line)
	1.58791 @Wavelength 852.11 nm	1.58791 @Wavelength 852.11 nm	ns (Cs s line)
	1.58954 @Wavelength 768.19 nm	1.58954 @Wavelength 768.19 nm	nA' (K A' line)
	1.59105 @Wavelength 706.52 nm	1.59105 @Wavelength 706.52 nm	nr (He r line)
	1.59255 @Wavelength 656.27 nm	1.59255 @Wavelength 656.27 nm	nC (H C line)
	1.59298 @Wavelength 643.85 nm	1.59298 @Wavelength 643.85 nm	nC' (Cd C' line)
	1.59337 @Wavelength 632.8 nm	1.59337 @Wavelength 632.8 nm	nHe-Ne
	1.59514 @Wavelength 589.29 nm	1.59514 @Wavelength 589.29 nm	nD
	1.59522 @Wavelength 587.56 nm	1.59522 @Wavelength 587.56 nm	nd (He D line)
	1.59732 @Wavelength 546.07 nm	1.59732 @Wavelength 546.07 nm	ne (Hg e line)
	1.60134 @Wavelength 486.13 nm	1.60134 @Wavelength 486.13 nm	nf (H F line)
	1.60184 @Wavelength 479.99 nm	1.60184 @Wavelength 479.99 nm	nF' (Cd F' line)
	1.60549 @Wavelength 441.57 nm	1.60549 @Wavelength 441.57 nm	nHe-Cd
	1.60612 @Wavelength 435.835 nm	1.60612 @Wavelength 435.835 nm	ng (Hg g line)
	1.61008 @Wavelength 404.656 nm	1.61008 @Wavelength 404.656 nm	nh (Hg h line)
	1.61681 @Wavelength 365.015 nm	1.61681 @Wavelength 365.015 nm	ni (Hg i line)
Abbe Number	67.37	67.37	ν e
	67.74	67.74	ν d
Optical Dispersion	0.002665	0.002665	nd-nC; Partial Dispersion
	0.003015	0.003015	nC-nA'; Partial Dispersion
	0.00396	0.00396	nh-ng; Partial Dispersion
	0.004338	0.004338	ne-nC'; Partial Dispersion
	0.004528	0.004528	nF'-ne; Partial Dispersion
	0.004761	0.004761	ne-nC; Partial Dispersion
	0.004782	0.004782	ng-nF; Partial Dispersion
	0.006988	0.006988	nC-nt; Partial Dispersion
	0.007411	0.007411	nC'-nt; Partial Dispersion
	0.008787	0.008787	nF-nC
	0.008866	0.008866	nF'-nC'
	0.010681	0.010681	ni-ng; Partial Dispersion
	0.010904	0.010904	ng-nd; Partial Dispersion
	0.014961	0.014961	ni-nF'; Partial Dispersion
Transmission, Visible	98 % @Thickness 10.0 mm, Wavelength 380 nm	98 % @Thickness 0.394 in, Wavelength 380 nm	Internal Transmission
	98.8 % @Thickness 10.0 mm, Wavelength 390 nm	98.8 % @Thickness 0.394 in, Wavelength 390 nm	Internal Transmission
	98.9 % @Thickness 10.0 mm, Wavelength 420 nm	98.9 % @Thickness 0.394 in, Wavelength 420 nm	Internal Transmission
	98.9 % @Thickness 10.0 mm, Wavelength 440 nm	98.9 % @Thickness 0.394 in, Wavelength 440 nm	Internal Transmission
	99.1 % @Thickness 10.0 mm, Wavelength 400 nm	99.1 % @Thickness 0.394 in, Wavelength 400 nm	Internal Transmission
	99.2 % @Thickness 10.0 mm, Wavelength 460 nm	99.2 % @Thickness 0.394 in, Wavelength 460 nm	Internal Transmission
	99.4 % @Thickness 10.0 mm, Wavelength 480 nm	99.4 % @Thickness 0.394 in, Wavelength 480 nm	Internal Transmission
	99.6 % @Thickness 10.0 mm, Wavelength 500 nm	99.6 % @Thickness 0.394 in, Wavelength 500 nm	Internal Transmission
	99.6 % @Thickness 10.0 mm, Wavelength 650 nm	99.6 % @Thickness 0.394 in, Wavelength 650 nm	Internal Transmission
	99.6 % @Thickness 10.0 mm, Wavelength 700 nm	99.6 % @Thickness 0.394 in, Wavelength 700 nm	Internal Transmission
	99.7 % @Thickness 10.0 mm, Wavelength 600 nm	99.7 % @Thickness 0.394 in, Wavelength 600 nm	Internal Transmission
	99.8 % @Thickness 10.0 mm, Wavelength 550 nm	99.8 % @Thickness 0.394 in, Wavelength 550 nm	Internal Transmission
IR Transmittance	98.3 % @Thickness 10.0 mm, Wavelength 2400 nm	98.3 % @Thickness 0.394 in, Wavelength 2400 nm	Internal Transmission
	98.9 % @Thickness 10.0 mm, Wavelength 2200 nm	98.9 % @Thickness 0.394 in, Wavelength 2200 nm	Internal Transmission
	99.2 % @Thickness 10.0 mm, Wavelength 2000 nm	99.2 % @Thickness 0.394 in, Wavelength 2000 nm	Internal Transmission
	99.5 % @Thickness 10.0 mm, Wavelength 800 nm	99.5 % @Thickness 0.394 in, Wavelength 800 nm	Internal Transmission
	99.5 % @Thickness 10.0 mm, Wavelength 900 nm	99.5 % @Thickness 0.394 in, Wavelength 900 nm	Internal Transmission
	99.5 % @Thickness 10.0 mm, Wavelength 1800 nm	99.5 % @Thickness 0.394 in, Wavelength 1800 nm	Internal Transmission
	99.6 % @Thickness 10.0 mm, Wavelength 1000 nm	99.6 % @Thickness 0.394 in, Wavelength 1000 nm	Internal Transmission
	99.7 % @Thickness 10.0 mm, Wavelength 1200 nm	99.7 % @Thickness 0.394 in, Wavelength 1200 nm	Internal Transmission
	99.7 % @Thickness 10.0 mm, Wavelength 1400 nm	99.7 % @Thickness 0.394 in, Wavelength 1400 nm	Internal Transmission
	99.7 % @Thickness 10.0 mm, Wavelength 1600 nm	99.7 % @Thickness 0.394 in, Wavelength 1600 nm	Internal Transmission
UV Transmittance	18 % @Thickness 10.0 mm, Wavelength 310 nm	18 % @Thickness 0.394 in, Wavelength 310 nm	Internal Transmission
	35 % @Thickness 10.0 mm, Wavelength 320 nm	35 % @Thickness 0.394 in, Wavelength 320 nm	Internal Transmission
	54 % @Thickness 10.0 mm, Wavelength 330 nm	54 % @Thickness 0.394 in, Wavelength 330 nm	Internal Transmission
	72 % @Thickness 10.0 mm, Wavelength 340 nm	72 % @Thickness 0.394 in, Wavelength 340 nm	Internal Transmission
	84 % @Thickness 10.0 mm, Wavelength 350 nm	84 % @Thickness 0.394 in, Wavelength 350 nm	Internal Transmission
	91.7 % @Thickness 10.0 mm, Wavelength 360 nm	91.7 % @Thickness 0.394 in, Wavelength 360 nm	Internal Transmission
	95.8 % @Thickness 10.0 mm, Wavelength 370 nm	95.8 % @Thickness 0.394 in, Wavelength 370 nm	Internal Transmission

Descriptive Properties
Acid Resistance, Powder Method, RA(P)	1
CCI	0.00 B
	0.32 G
	0.32 R
coloring, λ 5	295
coloring, λ 80	355
Coloring, Internal Transmission λ 0.05	302
Coloring, Internal Transmission λ 0.80	347
Knoop Hardness Class	4
Ohara Code d	595677
Ohara Code e	597674
Phosphate Resistance, PR	4.1
Photoelastic Constant (ß)	0.51
Water Resistance, RW(P)	1
Weathering Resistance (Surface Method) W(S)max	2
Yield Point, At (°C)	596		per thermal expansion curve

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

CZOHARA755 / 281594

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