Ohara S-NSL 5 Optical Glass

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Ohara S-NSL 5 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	2.49 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	69.1 GPa
Modulus of Rigidity	30.3 GPa
Poissons Ratio	0.14
Abrasion	114	Aa

Thermal Properties	Original Value	Comments
CTE, linear	8.20 µm/m-°C @Temperature -30.0 - 70.0 °C
	9.50 µm/m-°C @Temperature 100 - 300 °C
Thermal Conductivity	1.058 W/m-K @Temperature 35.0 °C
Transformation Temperature, Tg	548 °C	per thermal expansion curve
Softening Point	700 °C	10^7.65 poise; JIS-R3104 and ASTM-C338
Annealing Point	536 °C	10¹³ poise; ASTM-C336
Strain Point	502 °C	10^14.5 poise; JIS-R3103 and ASTM-C336

Optical Properties	Original Value	Comments
Refractive Index	1.49592 @Wavelength 2325.42 nm
	1.50104 @Wavelength 1970.09 nm
	1.50646 @Wavelength 1529.58 nm
	1.51108 @Wavelength 1128.64 nm
	1.51256 @Wavelength 1013.98 nm	nt (Hg t line)
	1.51509 @Wavelength 852.11 nm	ns (Cs s line)
	1.51678 @Wavelength 768.19 nm	nA' (K A' line)
	1.51831 @Wavelength 706.52 nm	nr (He r line)
	1.51983 @Wavelength 656.27 nm	nC (H C line)
	1.52026 @Wavelength 643.85 nm	nC' (Cd C' line)
	1.52065 @Wavelength 632.8 nm	nHe-Ne
	1.52242 @Wavelength 589.29 nm	nD (Na D line)
	1.52249 @Wavelength 587.56 nm	nd (He D line)
	1.52458 @Wavelength 546.07 nm	ne (Hg e line)
	1.52857 @Wavelength 486.13 nm	nf (H F line)
	1.52906 @Wavelength 479.99 nm	nF' (Cd F' line)
	1.53269 @Wavelength 441.57 nm	nHe-Cd
	1.53332 @Wavelength 435.835 nm	ng (Hg g line)
	1.53727 @Wavelength 404.656 nm	nh (Hg h line)
	1.54403 @Wavelength 365.015 nm	ni (Hg i line)
Abbe Number	59.58	ν e
	59.84	ν d
Optical Dispersion	0.008732	nF-nC
	0.008805	nF'-nC'
Transmission, Visible	98.4 % @Wavelength 380 nm
	99.2 % @Wavelength 390 nm
	99.5 % @Wavelength 400 nm
	99.6 % @Wavelength 420 nm
	99.6 % @Wavelength 440 nm
	99.6 % @Wavelength 460 nm
	99.7 % @Wavelength 480 nm
	99.7 % @Wavelength 650 nm
	99.8 % @Wavelength 500 nm
	99.8 % @Wavelength 550 nm
	99.8 % @Wavelength 600 nm
	99.8 % @Wavelength 700 nm
IR Transmittance	81 % @Wavelength 2400 nm
	86 % @Wavelength 2200 nm
	97.2 % @Wavelength 1800 nm
	98.8 % @Wavelength 1400 nm
	99.2 % @Wavelength 1600 nm
	99.7 % @Wavelength 1200 nm
	99.8 % @Wavelength 800 nm
	99.8 % @Wavelength 900 nm
	99.8 % @Wavelength 1000 nm
UV Transmittance	4.0 % @Wavelength 320 nm
	32 % @Wavelength 330 nm
	67 % @Wavelength 340 nm
	86 % @Wavelength 350 nm
	94.1 % @Wavelength 360 nm
	97.2 % @Wavelength 370 nm

Descriptive Properties
Acid Resistance, Powder Method, RAP)	1
coloring, λ 5	320
coloring, λ 80	345
Knoop Hardness Class	5
Melt Frequency	5
Ohara Code d	522598
Ohara Code e	525596
Ohara Status	Standard
Phosphate Resistance, PR	1
Photoelastic Constant (ß)	2.67
Relative Price	3	S-BSL7 = 1
Water Resistance, RW(P)	3
Weathering Resistance (Surface Method) W(S)max	1
Weathering Resistance (Surface Method) W(S)min	2
Yield Point, At (°C)	596	per thermal expansion curve

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