Image reading lens, image reading device, and image forming apparatus
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United States of America Patent
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Feb 14, 2017
Grant Date -
Jul 14, 2016
app pub date -
Dec 28, 2015
filing date -
Jan 9, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
An image reading lens includes a plurality of lenses, a first correcting mechanism that corrects a field curvature at a first correction part when temperature changes, and a second correcting mechanism that corrects an image-forming position when the temperature changes. The second correcting mechanism corrects the image-forming position at a part where a positional displacement of the image-forming position caused by a change of a lens interval is greater and a variation of the field curvature caused by the change of the lens interval is smaller than the first correction part.
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