FR1080099A - Very bright lens with variable focal length - Google Patents

Very bright lens with variable focal length

Info

Publication number
FR1080099A
FR1080099A FR1080099DA FR1080099A FR 1080099 A FR1080099 A FR 1080099A FR 1080099D A FR1080099D A FR 1080099DA FR 1080099 A FR1080099 A FR 1080099A
Authority
FR
France
Prior art keywords
focal length
variable focal
bright lens
bright
lens
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
Other languages
French (fr)
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.)
MECHANIK ZEISS IKON VEB
Original Assignee
MECHANIK ZEISS IKON VEB
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 MECHANIK ZEISS IKON VEB filed Critical MECHANIK ZEISS IKON VEB
Application granted granted Critical
Publication of FR1080099A publication Critical patent/FR1080099A/en
Expired legal-status Critical Current

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
    • G02B15/144—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 four groups only
    • G02B15/1445—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 four groups only the first group being negative
    • G02B15/144513—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 four groups only the first group being negative arranged --++

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR1080099D 1953-05-19 1953-05-19 Very bright lens with variable focal length Expired FR1080099A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1080099T 1953-05-19

Publications (1)

Publication Number Publication Date
FR1080099A true FR1080099A (en) 1954-12-06

Family

ID=9609468

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1080099D Expired FR1080099A (en) 1953-05-19 1953-05-19 Very bright lens with variable focal length

Country Status (1)

Country Link
FR (1) FR1080099A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2766658A (en) * 1955-05-20 1956-10-16 Schwesinger Gerhard Variable focal length focusing lens system and device therefor
DE1040280B (en) * 1955-02-08 1958-10-02 Schneider Co Optische Werke Bright photographic or cinematographic lens with variable focal length
US3045546A (en) * 1957-10-02 1962-07-24 Taylor Taylor & Hobson Ltd Optical objectives of variable focal length

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1040280B (en) * 1955-02-08 1958-10-02 Schneider Co Optische Werke Bright photographic or cinematographic lens with variable focal length
US2766658A (en) * 1955-05-20 1956-10-16 Schwesinger Gerhard Variable focal length focusing lens system and device therefor
US3045546A (en) * 1957-10-02 1962-07-24 Taylor Taylor & Hobson Ltd Optical objectives of variable focal length

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