Imaging lens assembly having multiple lenses with positive and negative refractive powers
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United States of America Patent
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Jul 19, 2011
Grant Date -
Apr 16, 2009
app pub date -
Apr 17, 2008
filing date -
Oct 10, 2007
priority date (Note) -
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Abstract
An imaging lens, which can be suitable for small-size information terminals, such as mobile phones equipped with cameras, or Personal Digital Assistants (PDAs). The imaging lens includes an iris, a first lens having a positive refractive power, a second lens, having a negative refractive power, a third lens having an aspherical shape and a positive refractive power, and a fourth lens having an aspherical shape and a negative refractive power.
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