초록 ▼

A scanner for reading barcode symbologies having a focusing illuminating source. The scanner uses a coherent light source for illuminating the coded symbol during a scan and a detector for collecting the reflected light energy from the coded symbol. Both the illuminating and collecting devices inclu

A scanner for reading barcode symbologies having a focusing illuminating source. The scanner uses a coherent light source for illuminating the coded symbol during a scan and a detector for collecting the reflected light energy from the coded symbol. Both the illuminating and collecting devices include lenses which are in variable spacial relationship with each other. The scanner varies the relationship between the light source and associated focusing lens to provide the narrowest focused beam at the barcode location.

대표청구항 ▼

[ We claim:] [1.] A scanner for reading coded symbologies on an object comprising:means for periodically illuminating a scanning region;means for detecting light reflected from said scanning region;means for determining at least one linear dimension of an object disposed within said scanning region;

[ We claim:] [1.] A scanner for reading coded symbologies on an object comprising:means for periodically illuminating a scanning region;means for detecting light reflected from said scanning region;means for determining at least one linear dimension of an object disposed within said scanning region; andfocusing means including a movable lens and a linear actuator for moving said lens to focus illumination in said scan region in response to said previously determined linear dimension;said focusing means comprisinga first support bracket providing a foundation for said focusing means;a second support bracket for securing a lens position sensing means;a first magnetic element connected with said second support bracket and defining a cylinder;means fastening said second support bracket to said first support bracket;a coil slidably disposed with said cylinder of said first magnetic element;a lens support for securing said movable lens to said coil; anda second magnet element affixed to said lens support in close proximity to said lens position sensing means.