Detailed Product Description Introducelaser scanner optical filter is designed to be used in Laser Bar Code Scanners. Be made of optical film on optical glass, transmitting 630~680nm light , blocking other visible light and infrared raySubstrate D263T/B270/BK7/Float glassSize2×2mm ~ 81×81mm Thickness0.4,0.5,0.7,1.1mmSurface Quality40/20,60/40