Three-piece optical pickup lens
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United States of America Patent
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Dec 25, 2012
Grant Date -
Jan 5, 2012
app pub date -
Feb 1, 2011
filing date -
Jun 30, 2010
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A three-piece optical pickup lens includes, sequentially from an object side to an image side of the three-piece optical pickup lens along an optical axis thereof, an aperture stop, a first lens, a second lens, and a third lens. The first lens is a meniscus lens of positive refractive power. The second lens has an object side and an image side, on each of which at least one inflection point is formed at a position located between a center and a periphery of the second lens. The third lens has an object side and an image side, on each of which at least one inflection point is formed at a position located between a center and a periphery of the third lens, and has positive refractive power at paraxial region of optical axis.
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