发明名称 |
Lens, manufacturing method thereof, and optical pickup |
摘要 |
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.
|
申请公布号 |
US6783707(B2) |
申请公布日期 |
2004.08.31 |
申请号 |
US20010788922 |
申请日期 |
2001.02.20 |
申请人 |
SONY CORPORATION |
发明人 |
UEDA HIROYUKI;SAITO SHINJI;KAWAKITA SATOSHI;SAKAKIBARA HIROYUKI |
分类号 |
G02B1/04;B29C35/08;B29C43/18;B29D11/00;C03B11/08;C03B11/14;G02B5/18;G02B27/00;G11B7/135;(IPC1-7):B29D11/00 |
主分类号 |
G02B1/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|