Patent ID: 6098887
Filing Date: 2000-08-08
Classification: G06K

Abstract:
A hand held symbology reader comprising:a portable housing configured to be held by a user such that the user can manipulate the reader for purposes of aiming it at a symbology to be read;a two-dimensional photodetector having an active area positioned in said housing at a predetermined location; andan objective taking lens positioned with respect to said two-dimensional photodetector to image symbologies on said active area thereof, said objective taking lens including a plurality of stationary lens elements fixedly aligned along an optical axis and at least one focusing element that is rotatable about an axis offset with respect to said optical axis, said focusing element being moveable transversely with respect to said optical axis to change the focus of said objective taking lens between at least two focusing zones so that said objective taking lens can image both linear and matrix symbologies over working distances that at least partially overlap with respect to linear and matrix symbologies.