Ohara S-LAH60V Optical Glass

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Ohara S-LAH60V Optical Glass
Categories:	Ceramic; Glass; Optical
Material Notes:	Information provided by Ohara Corporation.
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Physical Properties	Original Value	Comments

Specific Gravity	4.43 g/cc

Chemical Properties	Original Value	Comments
Acid Class, SR	51.2

Mechanical Properties	Original Value	Comments
Hardness, Knoop	660 @Load 0.0999 kg
Modulus of Elasticity	111.4 GPa
Modulus of Rigidity	44.5 GPa
Poissons Ratio	0.253
Abrasion	61	Aa

Thermal Properties	Original Value	Comments
CTE, linear	5.80 µm/m-°C @Temperature -30.0 - 70.0 °C
	7.30 µm/m-°C @Temperature 100 - 300 °C
Thermal Conductivity	0.880 W/m-K @Temperature 35.0 °C
Transformation Temperature, Tg	603 °C	per thermal expansion curve
Softening Point	669 °C	10^7.65 poise; JIS-R3104 and ASTM-C338
Annealing Point	588 °C	10¹³ poise; ASTM-C336
Strain Point	570 °C	10^14.5 poise; JIS-R3103 and ASTM-C336

Optical Properties	Original Value	Comments
Refractive Index	1.78608 @Wavelength 2325.42 nm
	1.79301 @Wavelength 1970.09 nm
	1.80073 @Wavelength 1529.58 nm
	1.80833 @Wavelength 1128.64 nm
	1.81114 @Wavelength 1013.98 nm	nt (Hg t line)
	1.81638 @Wavelength 852.11 nm	ns (Cs s line)
	1.82016 @Wavelength 768.19 nm	nA' (K A' line)
	1.82374 @Wavelength 706.52 nm	nr (He r line)
	1.8274 @Wavelength 656.27 nm	nC (H C line)
	1.82844 @Wavelength 643.85 nm	nC' (Cd C' line)
	1.82941 @Wavelength 632.8 nm	nHe-Ne
	1.8338 @Wavelength 589.29 nm	nD
	1.834 @Wavelength 587.56 nm	nd (He D line)
	1.83931 @Wavelength 546.07 nm	ne (Hg e line)
	1.84981 @Wavelength 486.13 nm	nf (H F line)
	1.85115 @Wavelength 479.99 nm	nF' (Cd F' line)
	1.86107 @Wavelength 441.57 nm	nHe-Cd
	1.86283 @Wavelength 435.835 nm	ng (Hg g line)
	1.87412 @Wavelength 404.656 nm	nh (Hg h line)
	1.89456 @Wavelength 365.015 nm	ni (Hg i line)
Abbe Number	36.95	ν e
	37.21	ν d
Optical Dispersion	0.006601	nd-nC; Partial Dispersion
	0.007235	nC-nA'; Partial Dispersion
	0.010878	ne-nC'; Partial Dispersion
	0.011289	nh-ng; Partial Dispersion
	0.011838	nF'-ne; Partial Dispersion
	0.011914	ne-nC; Partial Dispersion
	0.013018	ng-nF; Partial Dispersion
	0.016264	nC-nt; Partial Dispersion
	0.0173	nC'-nt; Partial Dispersion
	0.022416	nF-nC
	0.022716	nF'-nC'
	0.028833	ng-nd; Partial Dispersion
	0.031732	ni-ng; Partial Dispersion
	0.043414	ni-nF'; Partial Dispersion
Transmission, Visible	77 % @Thickness 10.0 mm, Wavelength 380 nm	Internal Transmission
	86 % @Thickness 10.0 mm, Wavelength 390 nm	Internal Transmission
	90.9 % @Thickness 10.0 mm, Wavelength 400 nm	Internal Transmission
	95.1 % @Thickness 10.0 mm, Wavelength 420 nm	Internal Transmission
	96.8 % @Thickness 10.0 mm, Wavelength 440 nm	Internal Transmission
	97.9 % @Thickness 10.0 mm, Wavelength 460 nm	Internal Transmission
	98.6 % @Thickness 10.0 mm, Wavelength 480 nm	Internal Transmission
	99.1 % @Thickness 10.0 mm, Wavelength 500 nm	Internal Transmission
	99.6 % @Thickness 10.0 mm, Wavelength 550 nm	Internal Transmission
	99.6 % @Thickness 10.0 mm, Wavelength 600 nm	Internal Transmission
	99.6 % @Thickness 10.0 mm, Wavelength 650 nm	Internal Transmission
	99.7 % @Thickness 10.0 mm, Wavelength 700 nm	Internal Transmission
IR Transmittance	72 % @Thickness 10.0 mm, Wavelength 2400 nm	Internal Transmission
	90.5 % @Thickness 10.0 mm, Wavelength 2200 nm	Internal Transmission
	96.1 % @Thickness 10.0 mm, Wavelength 2000 nm	Internal Transmission
	98.4 % @Thickness 10.0 mm, Wavelength 1800 nm	Internal Transmission
	99.3 % @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
UV Transmittance	5.0 % @Thickness 10.0 mm, Wavelength 350 nm	Internal Transmission
	29 % @Thickness 10.0 mm, Wavelength 360 nm	Internal Transmission
	59 % @Thickness 10.0 mm, Wavelength 370 nm	Internal Transmission

Descriptive Properties
Acid Resistance, Powder Method, RA(P)	3
CCI	0.00 B
	1.88 G
	1.88 R
coloring, λ 5	350
coloring, λ 80	430
Coloring, Internal Transmission λ 0.05	350
Coloring, Internal Transmission λ 0.80	383
Knoop Hardness Class	7
Ohara Code d	834372
Ohara Code e	839370
Phosphate Resistance, PR	1
Photoelastic Constant (ß)	2.1
Water Resistance, RW(P)	1
Weathering Resistance (Surface Method) W(S)max	1
Yield Point, At (°C)	635	per thermal expansion curve

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CZOHARA763 / 281602

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