Invention Grant
US08169880B2 Optical pickup having radially arranged lenses in a low profile construction
有权
光拾取器具有处于低轮廓结构的径向布置的透镜
- Patent Title: Optical pickup having radially arranged lenses in a low profile construction
- Patent Title (中): 光拾取器具有处于低轮廓结构的径向布置的透镜
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Application No.: US13209732Application Date: 2011-08-15
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Publication No.: US08169880B2Publication Date: 2012-05-01
- Inventor: Tomoto Kawamura , Yoshiro Konishi , Toshimasa Kamisada , Yasuo Kitada
- Applicant: Tomoto Kawamura , Yoshiro Konishi , Toshimasa Kamisada , Yasuo Kitada
- Applicant Address: JP Oshu-shi, Iwate
- Assignee: Hitachi Media Electronics Co., Ltd.
- Current Assignee: Hitachi Media Electronics Co., Ltd.
- Current Assignee Address: JP Oshu-shi, Iwate
- Agency: Kilpatrick Townsend & Stockton LLP
- Priority: JP2006-283246 20061018
- Main IPC: G11B7/00
- IPC: G11B7/00

Abstract:
An optical pickup includes a first source which emits a first beam with a first wavelength; a second source which emits a second beam with a wavelength shorter than the first wavelength; a first collimate lens which collimates the first beam; a second collimate lens which collimates the second beam; a first objective lens which converges the first collimated beam onto an optical disc; and a second objective lens which converges the second collimated beam onto the disc. The first and second objective lenses are arranged in the disc radial direction. The second objective lens is arranged closer to the side of the disc outer circumference than the first objective lens. The first collimate lens is arranged on the right-hand side when the second objective lens is viewed from the first objective lens. The second collimate lens is arranged on the left-hand side when the first objective lens is viewed from the second objective lens. The gap between the first collimate lens and the first objective lens is larger than the gap between the second collimate lens and the second objective lens.
Public/Granted literature
- US20110299378A1 Optical Pickup Having Radially Arranged Lenses in a Low Profile Construction Public/Granted day:2011-12-08
Information query
IPC分类: