Selective working distance range restriction in imaging system

Patent metadata

Field	Value
Publication number	US-9010643-B2
Application number	US-29079708-A
Country	US
Kind code	B2
Filing date	Nov 4, 2008
Priority date	Nov 4, 2008
Publication date	Apr 21, 2015
Grant date	Apr 21, 2015

Abstract

An imaging system for electro-optically reading a symbol located within a range of working distances from the system, utilizes a solid-state imager for capturing return light from the symbol and for generating an electrical signal indicative of the captured return light, and a controller for decoding the electrical signal into data indicative of the symbol A memory stores a known set of values for a plurality of optical characteristics of the symbol, such as size and contrast characteristics of the symbol when the symbol lies in a restricted zone within the range of working distances. The controller is operative, after the symbol has been successfully decoded, for processing the size and contrast characteristics of the decoded symbol, and for determining that the decoded symbol has been successfully read within the restricted zone when each size and contrast characteristic lies within the known set of values stored by the memory.

First claim

We claim:

1. An imaging system for electro-optically reading a symbol located within a range of working distances from the system, the symbol having a plurality of optical characteristics that vary with working distance, comprising:
a solid-state imager having an array of image sensors for capturing return light from the symbol over a field of view, and for generating an electrical signal indicative of the captured return light;
a controller operative for decoding the electrical…

Assignees

• Madej Dariusz J
• Vinogradov Igor
• Symbol Technologies Inc

Inventors

• Madej Dariusz J
• Vinogradov Igor

Classifications

• G06K7/10792

  Physics · mapped topic

• G06K7/10722 Primary

  Physics · mapped topic