JPH0429048B2 - - Google Patents

Info

Publication number
JPH0429048B2
JPH0429048B2 JP1112514A JP11251489A JPH0429048B2 JP H0429048 B2 JPH0429048 B2 JP H0429048B2 JP 1112514 A JP1112514 A JP 1112514A JP 11251489 A JP11251489 A JP 11251489A JP H0429048 B2 JPH0429048 B2 JP H0429048B2
Authority
JP
Japan
Prior art keywords
semiconductor laser
disk
lens
aspherical
height
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP1112514A
Other languages
English (en)
Japanese (ja)
Other versions
JPH02118508A (ja
Inventor
Yoji Kubota
Toshuki Inoe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nidec Instruments Corp
Original Assignee
Sankyo Seiki Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sankyo Seiki Manufacturing Co Ltd filed Critical Sankyo Seiki Manufacturing Co Ltd
Priority to JP1112514A priority Critical patent/JPH02118508A/ja
Publication of JPH02118508A publication Critical patent/JPH02118508A/ja
Publication of JPH0429048B2 publication Critical patent/JPH0429048B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/24—Optical objectives specially designed for the purposes specified below for reproducing or copying at short object distances

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
  • Optical Head (AREA)
JP1112514A 1989-05-01 1989-05-01 光ディスク用レンズ Granted JPH02118508A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1112514A JPH02118508A (ja) 1989-05-01 1989-05-01 光ディスク用レンズ

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1112514A JPH02118508A (ja) 1989-05-01 1989-05-01 光ディスク用レンズ

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP24028084A Division JPS61118708A (ja) 1984-11-14 1984-11-14 光デイスク用レンズ

Publications (2)

Publication Number Publication Date
JPH02118508A JPH02118508A (ja) 1990-05-02
JPH0429048B2 true JPH0429048B2 (enrdf_load_stackoverflow) 1992-05-15

Family

ID=14588556

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1112514A Granted JPH02118508A (ja) 1989-05-01 1989-05-01 光ディスク用レンズ

Country Status (1)

Country Link
JP (1) JPH02118508A (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6259668B1 (en) 1996-02-14 2001-07-10 Samsung Electronics Co., Ltd. Recording/reproducing apparatus having an optical pickup device to read from and record information to disks of different thicknesses
US6222812B1 (en) 1996-08-29 2001-04-24 Samsung Electronics Co., Ltd. Optical pickup using an optical phase plate
US6639889B1 (en) 1997-02-13 2003-10-28 Samsung Electronics Co., Ltd. Recording/reproducing apparatus including an optical pickup having an objective lens compatible with a plurality of optical disk formats
US6304540B1 (en) 1998-03-30 2001-10-16 Samsung Electronics Co., Ltd. Optical pickup compatible with a digital versatile disk and a recordable compact disk using a holographic ring lens
KR20030093683A (ko) 2002-06-05 2003-12-11 삼성전자주식회사 호환형 광픽업

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61190054U (enrdf_load_stackoverflow) * 1985-05-20 1986-11-27

Also Published As

Publication number Publication date
JPH02118508A (ja) 1990-05-02

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees