Aiming beam pattern generator of imaging reader for reading the electro-optical indicia

摘要

In order that the imaging reader is directed directly to the target is enabled, aiming light pattern using incoherent optical components manufactured by machining techniques and molding process, different are generated. An aiming pattern generator of an imaging reader for reading the electro-optical indicia having a light reflectance different parts, aiming pattern generator of the present invention were placed at intervals along the (a) one-way An optical component having a refractive structure of multiple, having a structural dimension T as measured along the direction, the optical components, the structure, the beam (b) a wavelength λ, is measured along the direction To produce visible collimated light beam having a beam cross-section having dimensions D, and, at a maximum angle α _max, which is measured with respect to the optical axis, to project an aiming light pattern on the indicia on being read, and the and a means for guiding along the optical axis through the refractive structures for refraction beam.