Invention Grant
US5665957A Lens device comprising light blocking means and an optical pickup
apparatus using the lens device
失效
包括遮光装置的透镜装置和使用透镜装置的光学拾取装置
- Patent Title: Lens device comprising light blocking means and an optical pickup apparatus using the lens device
- Patent Title (中): 包括遮光装置的透镜装置和使用透镜装置的光学拾取装置
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Application No.: US640553Application Date: 1996-05-01
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Publication No.: US5665957APublication Date: 1997-09-09
- Inventor: Chul-woo Lee , Dong-ho Shin , Kyung-hwa Rim , Chong-sam Chung , Kun-ho Cho , Pyong-yong Seong , Jang-hoon Yoo , Yong-hoon Lee
- Applicant: Chul-woo Lee , Dong-ho Shin , Kyung-hwa Rim , Chong-sam Chung , Kun-ho Cho , Pyong-yong Seong , Jang-hoon Yoo , Yong-hoon Lee
- Applicant Address: KRX Suwon
- Assignee: Samsung Electronics Co., Ltd.
- Current Assignee: Samsung Electronics Co., Ltd.
- Current Assignee Address: KRX Suwon
- Priority: KRX95-27715 19950830; KRX95-31679 19950925; KRX95-33914 19951004; KRX96-1605 19960125; KRX96-3605 19960214
- Main IPC: B29D11/00
- IPC: B29D11/00 ; G02B3/10 ; G02B27/58 ; G11B7/00 ; G11B7/0045 ; G11B7/005 ; G11B7/09 ; G11B7/13 ; G11B7/135 ; G01S1/20 ; H01J3/14
Abstract:
A lens device which can be used as an objective lens in an optical pickup apparatus includes an objective lens provided along a light path facing a disc and having a predetermined effective diameter, and light controlling means provided along the light path for controlling the light in an intermediate region between near and far axes of an incident light beam, thus providing a simplified and inexpensive device for using discs of differing thickness in a single disc drive, by reducing the spherical aberration effect.
Public/Granted literature
- US5138266A Single-probe charge measurement testing method Public/Granted day:1992-08-11
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