JGS3 Window
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JGS3 Window

   IR grade Fused Silica (JGS3) is super purity synthetic fused silica manufactured by melting of super pure ash in vacuum. It is transparent in the ultraviolet, visible and infrared spectral regions. It has no absorption bands in the visible region and has no OH absorption band at 2700 nm ("water band").

   JGS3 combines excellent physical properties with outstanding optical characteristics in the deep UV and the IR wavelength range. It is the preferred material for transmission optics; it is usually used in IR applications and also in those requiring very wide wavelength range from DUV to MIR. However the most common Fused Silica for infrared use is quite a bit more expensive than Silicon and slightly less expensive than Calcium Fluoride or ZnS Multi-spectral grade. Also a commercial quality of IR quartz often contains many small bubbles and should only be used for non-imaging applications. 

20191119145559765976

Typical Impurtity LevelUnit:ppm

Al

Ca

Cu

Fe

K

Li

Mg

Na

Ti

13

0.6

0.05

0.2

0.4

0.6

0.1

0.5

1.3

Physical Characteristics

Density

 (20g/m3

Thermal Conductivity

w/m·k1000

Thermal Expasion

-11000

Soft Point

Annealing

Strain Point

2.2

2.28

5.5×10-7

1670

1210

1110




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