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VAD-process Synthetic Fused Silica SK-1320

SK-1320 series of Ohara Quartz Co.,Ltd. is a synthetic fused silica for the optics developed as the fused silica material for precise various optical components for the optics application and the high-power laser.

SK-1321(abbr.U1),-1322(abbr.U2) is guaranteed the homogeneity each in one direction and three directions.
"L" attached to the end is suitable for the high-power laser.


Applications:

Lens,Window,Mirror,Prism,Filter,Corner Cube,Beam Splitter Etalons,Brewster,Optical Flat etc

Line up & each characteristics

 

Line up Max. size
(mm)
Striae*1 Homogeneity*2 Birefrengence*3
(nm/cm)
Bubbles*3
Striae (mm2/100cm3)
Fluorescence*4 Transmission
(nm)
SK-1320L 600 A   1D10 0-0.03 None 170-2500
SK-1321(U1) 250 A 1D2×10-6 1D3 0-0.03 Red 170-2500
SK-1321L(U1L) 250 A 1D2×10-6 1D3 0-0.03 None 170-2500
SK-1322(U2) 250 A 3D2×10-6 3D3 0-0.03 Red 170-2500
SK-1322L(U2L) 150 A 3D2×10-6 3D3 0-0.03 None 170-2500
SK-1300*5 600 A   1D10 0-0.03 Red 170-2500
SK-1310*5 600 A   1D10 0-0.03 Blue 170-3600
*1 According to the MIL-G-174 standard of the U.S.Military
*2 Valid area/diameter×90%
*3 Conforms to DIN 58927
*4 Excited at Excimer laser.
Please consult us about the application needed the excimer laser durability.
*5 Please refer to other special leaflet.

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Optical Qualities -Transmission


Transmission


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Refractive lndex

25°C(77F)
Wave length(nm) Refractive Index   Wave length(nm) Refractive Index
237.83 1.51538 587.56(d) 1.45863
248.20 1.50907 589.26(D) 1.45862
274.84 1.49655 656.27(C) 1.45653
334.15 1.48036 706.52(r) 1.45535
365.48(i) 1.47514 852.11(s) 1.45266
404.65(h) 1.47021 1013.98(t) 1.45044
435.83(g) 1.46728 1529.6 1.44449
486.13(F) 1.46329 2325.4 1.43318
546.07(e) 1.46066    

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Abbe number,Average dispersion


● Abbe number

● Average dispersion


Physical properties


ltem Unit Value ltem Unit Value
Density g/cm3 2.20 Coefficient of thermal expansion 1/K 5.5×10-7
Young's module GPa 71.4      
Torsional rigidity GPa 30.9 Softening point °C 1700
Poisson's ratio   0.17 Annealing point °C 1160
Compression strength GPa 1.1 Strain point °C 1060
Bending strength MPa 69      
Tensile strength MPa 55 Specific her(t 26°C) kJ/kgK 0.74
Vickers hardness GPa 8.8-10.1 Thermal conductivity ratio(26°C) W/mK 1.1
Knoop hardness GPa 6.4-7.0 Thermal conductivity ratio(100°C) W/mK 1.4


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