Lens, manufacturing method thereof, and optical pickup
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United States of America Patent
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Aug 31, 2004
Grant Date -
Aug 23, 2001
app pub date -
Feb 20, 2001
filing date -
Jul 17, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Disclosed are a lens efficiently manufactured into an accurate shape at a low cost, a manufacturing method thereof, and an optical pickup using the lens. The lens includes a geometrical optics portion for converging light having been incident thereon from its light incoming plane, and two diffraction optics portions provided on the light incoming plane and a light outgoing plane of the geometrical optics portion, wherein the diffraction optics portions are made from a material different from that of the geometrical optics portion.
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