FR1148396A - Objectif à distance focale variable - Google Patents

Objectif à distance focale variable

Info

Publication number
FR1148396A
FR1148396A FR1148396DA FR1148396A FR 1148396 A FR1148396 A FR 1148396A FR 1148396D A FR1148396D A FR 1148396DA FR 1148396 A FR1148396 A FR 1148396A
Authority
FR
France
Prior art keywords
focal length
length lens
variable focal
variable
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
English (en)
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.)
Jos Schneider Optische Werke GmbH
Original Assignee
Jos Schneider Optische Werke GmbH
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 Jos Schneider Optische Werke GmbH filed Critical Jos Schneider Optische Werke GmbH
Application granted granted Critical
Publication of FR1148396A publication Critical patent/FR1148396A/fr
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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
FR1148396D 1955-05-21 1956-05-07 Objectif à distance focale variable Expired FR1148396A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE797626X 1955-05-21

Publications (1)

Publication Number Publication Date
FR1148396A true FR1148396A (fr) 1957-12-06

Family

ID=6711215

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1148396D Expired FR1148396A (fr) 1955-05-21 1956-05-07 Objectif à distance focale variable

Country Status (2)

Country Link
FR (1) FR1148396A (fr)
GB (1) GB797626A (fr)

Also Published As

Publication number Publication date
GB797626A (en) 1958-07-02

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