FR1150483A - Variable focal length optical system - Google Patents

Variable focal length optical system

Info

Publication number
FR1150483A
FR1150483A FR1150483DA FR1150483A FR 1150483 A FR1150483 A FR 1150483A FR 1150483D A FR1150483D A FR 1150483DA FR 1150483 A FR1150483 A FR 1150483A
Authority
FR
France
Prior art keywords
optical system
focal length
variable focal
length optical
variable
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.)
Societe dOptique et de Mecanique de Haute Precision
Original Assignee
Societe dOptique et de Mecanique de Haute Precision
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 Societe dOptique et de Mecanique de Haute Precision filed Critical Societe dOptique et de Mecanique de Haute Precision
Application granted granted Critical
Publication of FR1150483A publication Critical patent/FR1150483A/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
    • G02B15/02—Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR1150483D 1956-05-07 1956-05-07 Variable focal length optical system Expired FR1150483A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1150483T 1956-05-07

Publications (1)

Publication Number Publication Date
FR1150483A true FR1150483A (en) 1958-01-14

Family

ID=9647339

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1150483D Expired FR1150483A (en) 1956-05-07 1956-05-07 Variable focal length optical system

Country Status (1)

Country Link
FR (1) FR1150483A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3014406A (en) * 1959-02-19 1961-12-26 Frank G Back Varifocal lens assembly for still camera photography
US3023673A (en) * 1958-12-12 1962-03-06 Bell & Howell Co Variable magnification afocal lens member

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3023673A (en) * 1958-12-12 1962-03-06 Bell & Howell Co Variable magnification afocal lens member
US3014406A (en) * 1959-02-19 1961-12-26 Frank G Back Varifocal lens assembly for still camera photography

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