Handle like reading unit for use in code reading apparatus and having plural light reflectors and direct light shielding plate
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United States of America Patent
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Oct 20, 1998
Grant Date -
N/A
app pub date -
Dec 20, 1995
filing date -
Dec 26, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The apparatus for reading a symbol of a 2-dimensional code has a diffusion plate and a diffuse reflection surface between a light source unit and an opening to prevent light emitted from the light source unit from directly reaching the opening. Illumination light from the light source unit reaches the diffuse reflection surface while the central axis of the light is shifted from the optical path to the diffusion plate. With this arrangement, nonuniformity of illumination light irradiated on a a symbol on object can be prevented, and a halation of light can be prevented. The symbol of the 2-dimensional code can therefore be accurately read.
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