Optical symbol (bar code) reading systems and devices

Details Optical symbol (bar code) reading systems and devices Optical symbol (bar code) reading systems and devices

G - Physics

06

K

G06K 7/10 (2006.01) G02B 26/10 (2006.01) G02B 27/44 (2006.01)

Patent

CA 2150698

A miniature scan engine module for bar code reading and data collection systems utilizes a light source (44) and a light collector (42), which in one embodiment are flexurally supported on a platform (62) which reciprocates (88) on pivots defined by flexures (96). The optical collector faces the bar code and pivots with the scanning beam source (a laser diode). A diffraction grating or Fresnel lens on the surface of the optical collector which faces the code directs the incoming light so that it propagates internally in a substrate within the body of the collector, i.e. in the optic itself and without air paths which require addition volume in the module, to a photodetector (68). The scan engine can be configured so that it occupies a volume of less than 1 cubic inch. A data collection system, in the form of a portable terminal, has a housing which provides a handle (12) and a receptacle (18) for a terminal unit (14) which is separable from the housing.

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