JPS6216410B2 - - Google Patents

Info

Publication number
JPS6216410B2
JPS6216410B2 JP55142408A JP14240880A JPS6216410B2 JP S6216410 B2 JPS6216410 B2 JP S6216410B2 JP 55142408 A JP55142408 A JP 55142408A JP 14240880 A JP14240880 A JP 14240880A JP S6216410 B2 JPS6216410 B2 JP S6216410B2
Authority
JP
Japan
Prior art keywords
lens
group
positive
focal length
lenses
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
Application number
JP55142408A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5774716A (en
Inventor
Yoji Kubota
Hidetoshi Hadama
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 JP55142408A priority Critical patent/JPS5774716A/ja
Publication of JPS5774716A publication Critical patent/JPS5774716A/ja
Publication of JPS6216410B2 publication Critical patent/JPS6216410B2/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 -
    • G02B9/12—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having three components only

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
  • Optical Head (AREA)
JP55142408A 1980-10-14 1980-10-14 Objective lens for video disk reproduction Granted JPS5774716A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55142408A JPS5774716A (en) 1980-10-14 1980-10-14 Objective lens for video disk reproduction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55142408A JPS5774716A (en) 1980-10-14 1980-10-14 Objective lens for video disk reproduction

Publications (2)

Publication Number Publication Date
JPS5774716A JPS5774716A (en) 1982-05-11
JPS6216410B2 true JPS6216410B2 (enrdf_load_stackoverflow) 1987-04-13

Family

ID=15314639

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55142408A Granted JPS5774716A (en) 1980-10-14 1980-10-14 Objective lens for video disk reproduction

Country Status (1)

Country Link
JP (1) JPS5774716A (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57144512A (en) * 1981-03-03 1982-09-07 Konishiroku Photo Ind Co Ltd Objective lens for reproduction of video disk
JPH02269303A (ja) * 1989-04-11 1990-11-02 Asahi Optical Co Ltd 光ディスク用色収差補正レンズ

Also Published As

Publication number Publication date
JPS5774716A (en) 1982-05-11

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