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1

Si

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Parameters	Unit	Data
Diameter	mm	3-800
Diameter tolerance	mm	/-0.01mm@3-100mm; /-0.05mm@100-300mm; /-0.2mm@300-800mm
Thickness tolerance	mm	/-0.01mm
Parallelism	arc minute	<3
Finish		10-5
Aperture	λ	λ/20 @ 633nm
Chamfer	mm	0.2mm × 45 °
light aperture		90%
Coating		According to customer requirements
Materials		Optical materials, such as optical glass, quartz, quartz crystal, calcium fluoride, magnesium fluoride, barium fluoride, lithium fluoride, zinc selenide, zinc sulfide, germanium, silicon, etc.