JPH0434124B2 - - Google Patents

Info

Publication number
JPH0434124B2
JPH0434124B2 JP56029437A JP2943781A JPH0434124B2 JP H0434124 B2 JPH0434124 B2 JP H0434124B2 JP 56029437 A JP56029437 A JP 56029437A JP 2943781 A JP2943781 A JP 2943781A JP H0434124 B2 JPH0434124 B2 JP H0434124B2
Authority
JP
Japan
Prior art keywords
lens
group
condition
object side
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.)
Expired - Lifetime
Application number
JP56029437A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57144512A (en
Inventor
Norikazu Arai
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta Inc
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 Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP2943781A priority Critical patent/JPS57144512A/ja
Publication of JPS57144512A publication Critical patent/JPS57144512A/ja
Publication of JPH0434124B2 publication Critical patent/JPH0434124B2/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
    • 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)
JP2943781A 1981-03-03 1981-03-03 Objective lens for reproduction of video disk Granted JPS57144512A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2943781A JPS57144512A (en) 1981-03-03 1981-03-03 Objective lens for reproduction of video disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2943781A JPS57144512A (en) 1981-03-03 1981-03-03 Objective lens for reproduction of video disk

Publications (2)

Publication Number Publication Date
JPS57144512A JPS57144512A (en) 1982-09-07
JPH0434124B2 true JPH0434124B2 (enrdf_load_stackoverflow) 1992-06-05

Family

ID=12276105

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2943781A Granted JPS57144512A (en) 1981-03-03 1981-03-03 Objective lens for reproduction of video disk

Country Status (1)

Country Link
JP (1) JPS57144512A (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60189702A (ja) * 1984-03-09 1985-09-27 Hitachi Ltd プリズム光学系およびそれを用いた情報装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5244210B2 (enrdf_load_stackoverflow) * 1974-02-21 1977-11-05
US3944338A (en) * 1974-11-11 1976-03-16 Bell & Howell Company Short focal length long back focus objective
US3942877A (en) * 1974-11-11 1976-03-09 Bell & Howell Company Short focal length Petzval-type optical system
JPS5774716A (en) * 1980-10-14 1982-05-11 Sankyo Seiki Mfg Co Ltd Objective lens for video disk reproduction

Also Published As

Publication number Publication date
JPS57144512A (en) 1982-09-07

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