Image-forming device

Optics: measuring and testing – Position or displacement – Position transverse to viewing axis

Reexamination Certificate

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Reexamination Certificate

active

08040531

ABSTRACT:
An image-forming device includes an image-forming unit, a sensor, a screening unit, an excluding unit, and a determining unit. The image-forming unit forms a plurality of marks on an object. The sensor detects a light reflected on the object, the reflected light including a plurality of waveforms. The screening unit screens the plurality of waveforms into a plurality of mark waveforms corresponding to the plurality of marks respectively and a plurality of noise waveforms other than the plurality of mark waveforms. The excluding unit excludes a mark waveform adjacent to the noise waveform from the plurality of mark waveforms. The determining unit determines a position of each mark based on the plurality of mark waveforms from which the mark waveform adjacent to the noise waveform is excluded.

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patent: 7822375 (2010-10-01), Osawa
patent: 2008/0056777 (2008-03-01), Osawa
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JP Office Action dtd Jun. 8, 2010, JP Appln. 2008-223994, English translation.
JP Office Action dtd Jan. 13, 2010, JP Appln. 2008-223994, English Translation.

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