Filter barcode scanner or scanner laser device in operation by an aspherical lens emits a red laser light signal, is irradiated through a variety of different angles of the object reflector, such as bar code lines. The product of the environment may have stray light (near infrared) as strong sunlight, fluorescent, halogen gold interference by these near-infrared optical path interference when anti-back time, so that sensor chip produce false identification or can not read the bar code and other adverse effects. Conventional optical indicators : 600nm ~ 690nm T> 90% 720nm ~ 900nm T90% 730nm ~ 750nm T <0.05% 750nm ~ 900nm T <0.001% 930nm ~ 1150nm T <0.005% Applications: Portable hand-held laser scanner wired barcode scanner barcode wireless distance desktop scanner barcode scanner laser measuring instrument 640nm LED lights red LD red laser diode pumped laser rangefinder IR fingerprint identification device