JPS5838916A - 光磁気デイスク用対物レンズ - Google Patents

光磁気デイスク用対物レンズ

Info

Publication number
JPS5838916A
JPS5838916A JP56137967A JP13796781A JPS5838916A JP S5838916 A JPS5838916 A JP S5838916A JP 56137967 A JP56137967 A JP 56137967A JP 13796781 A JP13796781 A JP 13796781A JP S5838916 A JPS5838916 A JP S5838916A
Authority
JP
Japan
Prior art keywords
lens
object side
group
lenses
focal length
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.)
Granted
Application number
JP56137967A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6233566B2 (cs
Inventor
Yoji Kubota
洋治 久保田
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 JP56137967A priority Critical patent/JPS5838916A/ja
Publication of JPS5838916A publication Critical patent/JPS5838916A/ja
Publication of JPS6233566B2 publication Critical patent/JPS6233566B2/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)
JP56137967A 1981-09-02 1981-09-02 光磁気デイスク用対物レンズ Granted JPS5838916A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56137967A JPS5838916A (ja) 1981-09-02 1981-09-02 光磁気デイスク用対物レンズ

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56137967A JPS5838916A (ja) 1981-09-02 1981-09-02 光磁気デイスク用対物レンズ

Publications (2)

Publication Number Publication Date
JPS5838916A true JPS5838916A (ja) 1983-03-07
JPS6233566B2 JPS6233566B2 (cs) 1987-07-21

Family

ID=15210917

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56137967A Granted JPS5838916A (ja) 1981-09-02 1981-09-02 光磁気デイスク用対物レンズ

Country Status (1)

Country Link
JP (1) JPS5838916A (cs)

Also Published As

Publication number Publication date
JPS6233566B2 (cs) 1987-07-21

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