Fused quartz glass windows

 Parameter

Standard   Grade

Precision   Grade

Ultra-precision   Grade

Dimensional Tolerance

+/-0.2

+/-0.1

+/-0.05

Clear Aperture

>80% to >90%

>80% to >90%

>80% to >90%

Surface Quality

80/50

60/40

40/20

Parallelism

3 arc min

1 arc min

30 arc seconds

Wavefront Distortion

5λper 25mm

1λper 25mm

λ/4

Protective Bevel

<0.25x45 deg

<0.25x45 deg

<0.25x45 deg

Material

Synthetic fused Silica, Fused quartz, IR quartz, Borosilicate glass,Sapphire   crystal, K9, B270, etc.

Shape

Circular, square, triangular, oval, and other shaped windows

Dimension

Large   window, Ultra-thin window, Regular size window

Precision

Ordinary   refractory window, High precision optical window

Coating

High   anti-UV Film, antireflective film, gold, aluminum, silver series quartz glass,   quartz UV filter, curved reflector and so on.