Registers – Coded record sensors – Particular sensor structure
Patent
1995-12-20
1998-10-20
Hajec, Donald T.
Registers
Coded record sensors
Particular sensor structure
235462, 235455, 235456, 235483, G06K 710
Patent
active
058250115
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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Itoh Takashi
Suzuki Masashi
Hajec Donald T.
Kabushiki Kaisha TEC
Lee Michael G.
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