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7306151 Method and apparatus for optically reading information from object based on control of optical path length  
An optical information reading apparatus for reading information codes such as a bar code and a two-dimensional code includes, an image-forming lens fixed at a given point and imaging a reflection...
7267276 Method and apparatus for optically reading target while folding reflected light  
In an apparatus for optically reading a target based on light reflected from the target, an imaging lens with a first optical axis is provided so that the reflected light enters into the imaging...
Matches 1 - 2 out of 2