OPTICAL INFORMATION READING APPARATUS
First Claim
1. An optical information reading apparatus, comprising:
- a light projection means for projecting light to an object to be read having portions with different light reflectances;
a reflector for deflecting the reflected light from the object to be read;
an imaging optical system for forming an image of deflected light by the reflector a light receiving position;
a photoelectric conversion means located at the light receiving position for photoelectrically converting the image made of the deflected light and outputting an electric signal; and
a calculation means for calculating the electric signal outputted from said photoelectric conversion means and outputting bar code binarized data indicating information of the object to be read, said calculation means forms a multipurpose processing circuit by integrally providing, on a single substrate, a data converter for converting the electric signal into a digital signal;
a digital signal calculation unit having a calculation processor for calculating the digital signal converted by said data converter and generating bar code binarized data, a data correction section for correcting the bar code binarized data, and a noise reduction section for reducing noises, for outputting the bar code binarized data indicating information of the object to be read;
an input accumulation unit for accumulating the bar code binarized data output from said digital signal calculation unit; and
a timing control unit for controlling operation timings of said light projection means, said photoelectric conversion means, said data converter, said digital signal calculation unit, and said input accumulation unit.
1 Assignment
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Accused Products
Abstract
An optical information reading apparatus applies light to an object to be read such as a bar code symbol, photoelectrically converts by a photodetector element a light image formed by the reflection light, and processes the obtained electric signal to output code data. Among the portions performing the signal processing, at least a data converter (13) for converting a photoelectrically converted electric signal into a digital signal, a digital signal calculation unit (17) for calculating the digital signal and generating code data indicating information of an object to be read, an input accumulation unit (20) for accumulating the code data, and a timing control unit (12) for controlling operation timings of these components are arranged on a single substrate as a multipurpose processing circuit block (10).
16 Citations
16 Claims
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1. An optical information reading apparatus, comprising:
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a light projection means for projecting light to an object to be read having portions with different light reflectances;
a reflector for deflecting the reflected light from the object to be read;
an imaging optical system for forming an image of deflected light by the reflector a light receiving position;
a photoelectric conversion means located at the light receiving position for photoelectrically converting the image made of the deflected light and outputting an electric signal; and
a calculation means for calculating the electric signal outputted from said photoelectric conversion means and outputting bar code binarized data indicating information of the object to be read, said calculation means forms a multipurpose processing circuit by integrally providing, on a single substrate, a data converter for converting the electric signal into a digital signal;
a digital signal calculation unit having a calculation processor for calculating the digital signal converted by said data converter and generating bar code binarized data, a data correction section for correcting the bar code binarized data, and a noise reduction section for reducing noises, for outputting the bar code binarized data indicating information of the object to be read;
an input accumulation unit for accumulating the bar code binarized data output from said digital signal calculation unit; and
a timing control unit for controlling operation timings of said light projection means, said photoelectric conversion means, said data converter, said digital signal calculation unit, and said input accumulation unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification