Automatic range control method for an optical density/dot percentage measuring device
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United States of America Patent
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Apr 19, 1988
Issued Date -
N/A
app pub date -
Mar 18, 1987
filing date -
Oct 12, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This invention relates to an automatic range control method for a compact and portable optical density/dot percentage measuring device which can use a conventional light table as its light source, and which can digitally display a result of measurement. In the method, information obtained from an A/D converter, which converts a measured analog signal to a digital signal, is positively employed for reducing overall measuring time. An A/D conversion is first made at x1 range by a 10 bit A/D converter. The A/D conversion value is compared with predetermined values to determine a gain to be selected and perform further A/D conversion.
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- Non-US Classification not provided for expired patents
Cited Art Landscape
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- Citation Ranking not provided for expired patents
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