FR1258948A - Objectif à distance focale variable - Google Patents

Objectif à distance focale variable

Info

Publication number
FR1258948A
FR1258948A FR820815A FR820815A FR1258948A FR 1258948 A FR1258948 A FR 1258948A FR 820815 A FR820815 A FR 820815A FR 820815 A FR820815 A FR 820815A FR 1258948 A FR1258948 A FR 1258948A
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
FR820815A
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.)
Chalier & Cie
Original Assignee
Chalier & Cie
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 Chalier & Cie filed Critical Chalier & Cie
Priority to FR820815A priority Critical patent/FR1258948A/fr
Application granted granted Critical
Publication of FR1258948A publication Critical patent/FR1258948A/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
    • G02B15/142—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 two groups only
    • G02B15/1425—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 two groups only the first group being negative

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR820815A 1960-03-09 1960-03-09 Objectif à distance focale variable Expired FR1258948A (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR820815A FR1258948A (fr) 1960-03-09 1960-03-09 Objectif à distance focale variable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR820815A FR1258948A (fr) 1960-03-09 1960-03-09 Objectif à distance focale variable

Publications (1)

Publication Number Publication Date
FR1258948A true FR1258948A (fr) 1961-04-21

Family

ID=8726717

Family Applications (1)

Application Number Title Priority Date Filing Date
FR820815A Expired FR1258948A (fr) 1960-03-09 1960-03-09 Objectif à distance focale variable

Country Status (1)

Country Link
FR (1) FR1258948A (fr)

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