FR1271304A - Perfectionnements aux objectifs à longueur focale variable - Google Patents

Perfectionnements aux objectifs à longueur focale variable

Info

Publication number
FR1271304A
FR1271304A FR837657A FR837657A FR1271304A FR 1271304 A FR1271304 A FR 1271304A FR 837657 A FR837657 A FR 837657A FR 837657 A FR837657 A FR 837657A FR 1271304 A FR1271304 A FR 1271304A
Authority
FR
France
Prior art keywords
enhancements
focal length
variable focal
length lenses
lenses
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
FR837657A
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.)
Rank Precision Industries Ltd
Original Assignee
Rank Precision Industries Ltd
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
Priority claimed from GB30034/59A external-priority patent/GB953864A/en
Application filed by Rank Precision Industries Ltd filed Critical Rank Precision Industries Ltd
Priority to FR837657A priority Critical patent/FR1271304A/fr
Application granted granted Critical
Publication of FR1271304A publication Critical patent/FR1271304A/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
    • G02B15/143105—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 +-+

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR837657A 1959-09-03 1960-09-02 Perfectionnements aux objectifs à longueur focale variable Expired FR1271304A (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR837657A FR1271304A (fr) 1959-09-03 1960-09-02 Perfectionnements aux objectifs à longueur focale variable

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB30034/59A GB953864A (en) 1959-09-03 1959-09-03 Improvements in or relating to optical objectives of variable focal length
FR837657A FR1271304A (fr) 1959-09-03 1960-09-02 Perfectionnements aux objectifs à longueur focale variable

Publications (1)

Publication Number Publication Date
FR1271304A true FR1271304A (fr) 1961-09-08

Family

ID=26187342

Family Applications (1)

Application Number Title Priority Date Filing Date
FR837657A Expired FR1271304A (fr) 1959-09-03 1960-09-02 Perfectionnements aux objectifs à longueur focale variable

Country Status (1)

Country Link
FR (1) FR1271304A (fr)

Similar Documents

Publication Publication Date Title
FR67970E (fr) Objectif à longueur focale variable
FR1112979A (fr) Objectif à distance focale variable
AT241152B (de) Objektiv veränderlicher Brennweite
CH376684A (de) Lichtstarkes photographisches oder kinematographisches Aufnahmeobjektiv veränderlicher Brennweite
FR1280357A (fr) Objectif photographique à distance focale variable
FR1274469A (fr) Objectif à focale variable
FR82637E (fr) Objectif de longueur focale variable
FR1267355A (fr) Perfectionnements aux objectifs à longueur focale variable
FR1299573A (fr) Perfectionnements aux lentilles multifocales
FR1274875A (fr) Perfectionnements aux lentilles électroniques
CH380406A (fr) Objectif optique à longueur focale variable
FR1315029A (fr) Objectif de longueur focale variable
CH380404A (de) Photographisches Objektiv kontinuierlich veränderbarer Brennweite
FR1311131A (fr) Perfectionnements aux objectifs de longueur focale variable
FR1271304A (fr) Perfectionnements aux objectifs à longueur focale variable
FR1376655A (fr) Perfectionnements aux objectifs à focale variable
CH369293A (fr) Objectif téléphoto inversé
FR1344261A (fr) Objectif de longueur focale variable
CH361676A (de) Lichtstarkes photographisches Teleobjektiv
FR1212286A (fr) Perfectionnements aux objectifs à distance focale variable
FR1244934A (fr) Objectif à distance focale variable
FR1217892A (fr) Perfectionnements aux lentilles bifocales
CH347650A (fr) Objectif à focale variable
FR1220082A (fr) Objectif à longueur focale variable
FR1259007A (fr) Objectif à distance focale variable de construction simple