FR1259007A - Simple construction variable focal length lens - Google Patents

Simple construction variable focal length lens

Info

Publication number
FR1259007A
FR1259007A FR820986A FR820986A FR1259007A FR 1259007 A FR1259007 A FR 1259007A FR 820986 A FR820986 A FR 820986A FR 820986 A FR820986 A FR 820986A FR 1259007 A FR1259007 A FR 1259007A
Authority
FR
France
Prior art keywords
focal length
simple construction
length lens
variable focal
construction 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
FR820986A
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.)
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 FR820986A priority Critical patent/FR1259007A/en
Application granted granted Critical
Publication of FR1259007A publication Critical patent/FR1259007A/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
    • G02B15/142—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
    • G02B15/1421—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 positive

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR820986A 1960-03-09 1960-03-09 Simple construction variable focal length lens Expired FR1259007A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR820986A FR1259007A (en) 1960-03-09 1960-03-09 Simple construction variable focal length lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR820986A FR1259007A (en) 1960-03-09 1960-03-09 Simple construction variable focal length lens

Publications (1)

Publication Number Publication Date
FR1259007A true FR1259007A (en) 1961-04-21

Family

ID=8726838

Family Applications (1)

Application Number Title Priority Date Filing Date
FR820986A Expired FR1259007A (en) 1960-03-09 1960-03-09 Simple construction variable focal length lens

Country Status (1)

Country Link
FR (1) FR1259007A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3143590A (en) * 1961-02-28 1964-08-04 Nippon Kogaku Kk Zoom lens
US4991945A (en) * 1989-07-05 1991-02-12 Eastman Kodak Company Zoom lens

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3143590A (en) * 1961-02-28 1964-08-04 Nippon Kogaku Kk Zoom lens
DE1236817B (en) * 1961-02-28 1967-03-16 Nippon Kogaku Kk Pancratic lens
US4991945A (en) * 1989-07-05 1991-02-12 Eastman Kodak Company Zoom lens

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