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Substrate	UV grade fused silica, BK7
Flatness	﹤λ/10@633nm
Surface Quality[S/D	10/5
Chamfer	0.25mm@45º
Clear Aperture	﹥85% of central area
incident Angle	56.3º ±3
wavelength Range	Visible; Near infrared
Extinction Ratio	Tp/TS﹥500∶1
Laser-induced Damage Threshold	﹥5j*cm﹣² (1064nm,10ns)