CH399770A - Pancratic lens for recording and playback purposes - Google Patents

Pancratic lens for recording and playback purposes

Info

Publication number
CH399770A
CH399770A CH1144161A CH1144161A CH399770A CH 399770 A CH399770 A CH 399770A CH 1144161 A CH1144161 A CH 1144161A CH 1144161 A CH1144161 A CH 1144161A CH 399770 A CH399770 A CH 399770A
Authority
CH
Switzerland
Prior art keywords
recording
pancratic lens
playback purposes
playback
purposes
Prior art date
Application number
CH1144161A
Other languages
German (de)
Inventor
G Dr Back Frank
Original Assignee
Voigtlaender Ag
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 Voigtlaender Ag filed Critical Voigtlaender Ag
Publication of CH399770A publication Critical patent/CH399770A/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/145—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having five groups only
    • G02B15/1455—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having five groups only the first group being negative
    • G02B15/145527—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having five groups only the first group being negative arranged -+-++

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
  • Telescopes (AREA)
CH1144161A 1959-01-21 1961-10-02 Pancratic lens for recording and playback purposes CH399770A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEV15795A DE1094480B (en) 1959-01-21 1959-01-21 Pancratic lens for recording and playback purposes
DEV0021158 1961-08-11

Publications (1)

Publication Number Publication Date
CH399770A true CH399770A (en) 1965-09-30

Family

ID=26001327

Family Applications (2)

Application Number Title Priority Date Filing Date
CH860A CH399769A (en) 1959-01-21 1960-01-04 Fast pancratic lens
CH1144161A CH399770A (en) 1959-01-21 1961-10-02 Pancratic lens for recording and playback purposes

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CH860A CH399769A (en) 1959-01-21 1960-01-04 Fast pancratic lens

Country Status (5)

Country Link
CH (2) CH399769A (en)
DE (1) DE1094480B (en)
FR (1) FR1247591A (en)
GB (2) GB949465A (en)
NL (2) NL247454A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2253281B (en) * 1991-02-15 1994-05-25 Asahi Optical Co Ltd Zoom lens

Also Published As

Publication number Publication date
GB1016881A (en) 1966-01-12
DE1094480B (en) 1960-12-08
FR1247591A (en) 1960-12-02
GB949465A (en) 1964-02-12
NL247454A (en)
NL121784C (en)
CH399769A (en) 1965-09-30

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