发明名称 |
Method and apparatus for providing omnidirectional lighting in a scanning device |
摘要 |
Systems and methods are provided for selectively controlling the illumination, and particularly dark field illumination, applied to a symbol to be decoded, and for determining a suitable or optimized level of lighting for decoding the symbol. A method includes providing a light source comprising a plurality of individually-controllable lighting elements for providing low angle dark field illumination; activating an image sensor for detecting image data reflected from an encoded data symbol when the encoded data symbol is illuminated by the light source; and providing a controller connected to each of the individually-controllable lighting elements, the controller being programmed for: selectively activating the individually-controllable lighting elements to vary the direction of the low angle dark field illumination provided by the light source; and processing the image data detected by the image. |
申请公布号 |
US8740078(B2) |
申请公布日期 |
2014.06.03 |
申请号 |
US201213623344 |
申请日期 |
2012.09.20 |
申请人 |
Cognex Technology and Investment Corporation |
发明人 |
Gerst, III Carl W.;Equitz William H.;Testa Justin;Nadabar Sateesha |
分类号 |
G06K7/00 |
主分类号 |
G06K7/00 |
代理机构 |
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代理人 |
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主权项 |
1. A digital scanning device for decoding a digitally encoded symbol comprising:
a light source comprising individually-controllable lighting elements for providing low angle dark field illumination to an encoded data symbol; an image sensor for detecting image data reflected from the encoded data symbol when illuminated by the light source; and a controller connected to each of the individually-controllable lighting elements, the controller being programmed to selectively activate a subset of individually-controllable lighting elements, wherein when the subset of the individually-controllable lighting elements are activated the light source illuminates the data encoded symbol in a desired direction.
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地址 |
Mountain View CA US |