Patent ID: 7637431

Claim:
An optical system used in a barcode scanner, comprising an image forming lens, light source means, reflector means adapted to reflect light from said light source means, and condenser means adapted to condense reflected light from said reflector means onto a barcode for enabling said image forming lens to pick up the image of the barcode, wherein: said image forming lens forms an image mapping surface on the barcode and picks up the image of said image mapping surface; said light source means comprises two light emitting diodes transversely arranged at two opposite lateral sides relative to said image forming lens and respectively aimed at said image forming lens; said condenser means comprises two condensers respectively arranged in parallel to said light emitting devices; said reflector means comprises two curved reflectors respectively arranged adjacent to said two light emitting devices, said curved reflectors each having a curved reflecting surface so that said curved reflectors reflect a light from said light emitting devices through said condensers onto the image mapping surface formed by said image forming lens on the barcode such that left and right sides of the image mapping surface is brighter than a center part thereof.