JPS5848010A - ビデオディスク用対物レンズ - Google Patents

ビデオディスク用対物レンズ

Info

Publication number
JPS5848010A
JPS5848010A JP14670481A JP14670481A JPS5848010A JP S5848010 A JPS5848010 A JP S5848010A JP 14670481 A JP14670481 A JP 14670481A JP 14670481 A JP14670481 A JP 14670481A JP S5848010 A JPS5848010 A JP S5848010A
Authority
JP
Japan
Prior art keywords
lens
group
positive
focal length
conditions
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
JP14670481A
Other languages
English (en)
Japanese (ja)
Other versions
JPS612927B2 (enExample
Inventor
Takahiro Sugiyama
孝浩 杉山
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.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo 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 Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Priority to JP14670481A priority Critical patent/JPS5848010A/ja
Publication of JPS5848010A publication Critical patent/JPS5848010A/ja
Publication of JPS612927B2 publication Critical patent/JPS612927B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/34—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having four components only
    • 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)
JP14670481A 1981-09-17 1981-09-17 ビデオディスク用対物レンズ Granted JPS5848010A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14670481A JPS5848010A (ja) 1981-09-17 1981-09-17 ビデオディスク用対物レンズ

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14670481A JPS5848010A (ja) 1981-09-17 1981-09-17 ビデオディスク用対物レンズ

Publications (2)

Publication Number Publication Date
JPS5848010A true JPS5848010A (ja) 1983-03-19
JPS612927B2 JPS612927B2 (enExample) 1986-01-29

Family

ID=15413653

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14670481A Granted JPS5848010A (ja) 1981-09-17 1981-09-17 ビデオディスク用対物レンズ

Country Status (1)

Country Link
JP (1) JPS5848010A (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6032052A (ja) * 1983-08-03 1985-02-19 Toray Ind Inc 静電記録体
JPH0867918A (ja) * 1994-06-20 1996-03-12 Kobe Steel Ltd 連続式加熱炉における炉温決定方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6032052A (ja) * 1983-08-03 1985-02-19 Toray Ind Inc 静電記録体
JPH0867918A (ja) * 1994-06-20 1996-03-12 Kobe Steel Ltd 連続式加熱炉における炉温決定方法

Also Published As

Publication number Publication date
JPS612927B2 (enExample) 1986-01-29

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