Ohara S-NPH 1W Optical Glass

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Ohara S-NPH 1W Optical Glass
Categories:	Ceramic; Glass; Optical
Material Notes:	Information provided by Ohara Corporation.
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Physical Properties	Original Value	Comments

Specific Gravity	3.29 g/cc

Chemical Properties	Original Value	Comments
Acid Class, SR	1.0

Mechanical Properties	Original Value	Comments
Hardness, Knoop	460 @Load 0.0999 kg
Modulus of Elasticity	89.3 GPa
Modulus of Rigidity	35.7 GPa
Poissons Ratio	0.25
Abrasion	320	Aa

Thermal Properties	Original Value	Comments
CTE, linear	8.30 µm/m-°C @Temperature -30.0 - 70.0 °C
	10.4 µm/m-°C @Temperature 100 - 300 °C
Thermal Conductivity	0.882 W/m-K @Temperature 35.0 °C
Transformation Temperature, Tg	552 °C	per thermal expansion curve
Softening Point	645 °C	10^7.65 poise; JIS-R3104 and ASTM-C338
Annealing Point	547 °C	10¹³ poise; ASTM-C336
Strain Point	516 °C	10^14.5 poise; JIS-R3103 and ASTM-C336

Optical Properties	Original Value	Comments
Refractive Index	1.74455 @Wavelength 2325.42 nm
	1.75226 @Wavelength 1970.09 nm
	1.76125 @Wavelength 1529.58 nm
	1.77084 @Wavelength 1128.64 nm
	1.77459 @Wavelength 1013.98 nm	nt (Hg t line)
	1.78187 @Wavelength 852.11 nm	ns (Cs s line)
	1.78731 @Wavelength 768.19 nm	nA' (K A' line)
	1.79256 @Wavelength 706.52 nm	nr (He r line)
	1.79801 @Wavelength 656.27 nm	nC (H C line)
	1.79957 @Wavelength 643.85 nm	nC' (Cd C' line)
	1.80105 @Wavelength 632.8 nm	nHe-Ne
	1.80779 @Wavelength 589.29 nm	nD
	1.80809 @Wavelength 587.56 nm	nd (He D line)
	1.81643 @Wavelength 546.07 nm	ne (Hg e line)
	1.83351 @Wavelength 486.13 nm	nf (H F line)
	1.83575 @Wavelength 479.99 nm	nF' (Cd F' line)
	1.85279 @Wavelength 441.57 nm	nHe-Cd
	1.8559 @Wavelength 435.835 nm	ng (Hg g line)
	1.87658 @Wavelength 404.656 nm	nh (Hg h line)
Abbe Number	22.57	ν e
	22.76	ν d
Optical Dispersion	0.010086	nd-nC; Partial Dispersion
	0.010701	nC-nA'; Partial Dispersion
	0.016862	ne-nC'; Partial Dispersion
	0.018425	ne-nC; Partial Dispersion
	0.019312	nF'-ne; Partial Dispersion
	0.020676	nh-ng; Partial Dispersion
	0.022391	ng-nF; Partial Dispersion
	0.02342	nC-nt; Partial Dispersion
	0.024983	nC'-nt; Partial Dispersion
	0.035504	nF-nC
	0.036174	nF'-nC'
	0.047809	ng-nd; Partial Dispersion
Transmission, Visible	28 % @Thickness 10.0 mm, Wavelength 380 nm	Internal Transmission
	67 % @Thickness 10.0 mm, Wavelength 390 nm	Internal Transmission
	87 % @Thickness 10.0 mm, Wavelength 400 nm	Internal Transmission
	95.6 % @Thickness 10.0 mm, Wavelength 420 nm	Internal Transmission
	97.2 % @Thickness 10.0 mm, Wavelength 440 nm	Internal Transmission
	97.8 % @Thickness 10.0 mm, Wavelength 460 nm	Internal Transmission
	98.3 % @Thickness 10.0 mm, Wavelength 480 nm	Internal Transmission
	98.6 % @Thickness 10.0 mm, Wavelength 500 nm	Internal Transmission
	99.3 % @Thickness 10.0 mm, Wavelength 550 nm	Internal Transmission
	99.6 % @Thickness 10.0 mm, Wavelength 600 nm	Internal Transmission
	99.7 % @Thickness 10.0 mm, Wavelength 650 nm	Internal Transmission
	99.8 % @Thickness 10.0 mm, Wavelength 700 nm	Internal Transmission
IR Transmittance	88 % @Thickness 10.0 mm, Wavelength 2400 nm	Internal Transmission
	93.2 % @Thickness 10.0 mm, Wavelength 2200 nm	Internal Transmission
	97.3 % @Thickness 10.0 mm, Wavelength 2000 nm	Internal Transmission
	98.6 % @Thickness 10.0 mm, Wavelength 1800 nm	Internal Transmission
	99.4 % @Thickness 10.0 mm, Wavelength 1600 nm	Internal Transmission
	99.6 % @Thickness 10.0 mm, Wavelength 1400 nm	Internal Transmission
	99.9 % @Thickness 10.0 mm, Wavelength 800 nm	Internal Transmission
	99.9 % @Thickness 10.0 mm, Wavelength 900 nm	Internal Transmission
	99.9 % @Thickness 10.0 mm, Wavelength 1000 nm	Internal Transmission
	99.9 % @Thickness 10.0 mm, Wavelength 1200 nm	Internal Transmission

Descriptive Properties
Acid Resistance, Powder Method, RA(P)	1
CCI	0.00 B
	2.65 G
	2.65 R
coloring, λ 5	375
coloring, λ 80	420
Coloring, Internal Transmission λ 0.05	372
Coloring, Internal Transmission λ 0.80	395
Knoop Hardness Class	5
Ohara Code d	808228
Ohara Code e	816226
Phosphate Resistance, PR	1
Photoelastic Constant (ß)	3.23
Water Resistance, RW(P)	1
Weathering Resistance (Surface Method) W(S)max	1
Weathering Resistance (Surface Method) W(S)min	2
Yield Point, At (°C)	589	per thermal expansion curve

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CZOHARA782 / 281621

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