| 摘要 |
<p>This invention aims at reading optical information formed on a specular surface having a high intensity of reflected light of a specular reflection component. Part of the light radiated through a lens is diffused and reflected on a diffusing reflector, and it reaches an image sensor. When a bar code reader is inclined at a predetermined angle, the first radiated light out of the first and second radiated light does not reach the image sensor, but part of the diffused reflected light is reflected on a specular surface and introduced to the image sensor along the above-mentioned optical path. This enables even a bar code formed on a specular surface to be read by a regular reading operation in which such a bar code is read by a bar code reader disposed with its read port in contact with the specular surface.</p> |
