EFFICIENT OPTICAL ILLUMINATION SYSTEM AND METHOD FOR AN IMAGING READER

摘要

A target to be read by image capture is illuminated with an illumination light pattern by an illuminating light assembly having an enhanced optical coupling efficiency. The assembly includes a hybrid lens component having a first lens portion centered on an optical axis, and a second total internal reflection (TIR) lens portion surrounding the first lens portion about the optical axis. Both lens portions intercept, bend and collimate illumination light emitted from a light emitting diode. The collimated light is incident on a lenslet component having an array of lenslets generally arranged in a plane that is generally perpendicular to the optical axis.

主权项

1. An optical illumination system for illuminating a target to be read by image capture, comprising:
an illumination light source component for emitting illumination light; and a hybrid lens component including a first lens portion centered on an optical axis, and a second total internal reflection (TIR) lens portion surrounding the first lens portion about the optical axis, both lens portions being operative for intercepting, bending and collimating the emitted illumination light to generate an illumination light pattern on the target, and wherein the first lens portion has a convex surface facing the illumination light source.