FR1244934A - Objectif à distance focale variable - Google Patents

Objectif à distance focale variable

Info

Publication number
FR1244934A
FR1244934A FR805580A FR805580A FR1244934A FR 1244934 A FR1244934 A FR 1244934A FR 805580 A FR805580 A FR 805580A FR 805580 A FR805580 A FR 805580A FR 1244934 A FR1244934 A FR 1244934A
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
FR805580A
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 FR805580A priority Critical patent/FR1244934A/fr
Application granted granted Critical
Publication of FR1244934A publication Critical patent/FR1244934A/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
    • G02B15/143—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 three groups only
    • G02B15/1431—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 three groups only the first group being positive
    • G02B15/143101—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 three groups only the first group being positive arranged +--
FR805580A 1959-09-21 1959-09-21 Objectif à distance focale variable Expired FR1244934A (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR805580A FR1244934A (fr) 1959-09-21 1959-09-21 Objectif à distance focale variable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR805580A FR1244934A (fr) 1959-09-21 1959-09-21 Objectif à distance focale variable

Publications (1)

Publication Number Publication Date
FR1244934A true FR1244934A (fr) 1960-11-04

Family

ID=8719312

Family Applications (1)

Application Number Title Priority Date Filing Date
FR805580A Expired FR1244934A (fr) 1959-09-21 1959-09-21 Objectif à distance focale variable

Country Status (1)

Country Link
FR (1) FR1244934A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5015077A (en) * 1989-02-28 1991-05-14 Minolta Camera Kabushiki Kaisha Zoom lens system for use in a microfilm projection apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5015077A (en) * 1989-02-28 1991-05-14 Minolta Camera Kabushiki Kaisha Zoom lens system for use in a microfilm projection apparatus

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