FR1271303A - Improvements to Variable Focal Length Optical Lenses - Google Patents

Improvements to Variable Focal Length Optical Lenses

Info

Publication number
FR1271303A
FR1271303A FR837656A FR837656A FR1271303A FR 1271303 A FR1271303 A FR 1271303A FR 837656 A FR837656 A FR 837656A FR 837656 A FR837656 A FR 837656A FR 1271303 A FR1271303 A FR 1271303A
Authority
FR
France
Prior art keywords
focal length
optical lenses
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
FR837656A
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.)
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 FR837656A priority Critical patent/FR1271303A/en
Application granted granted Critical
Publication of FR1271303A publication Critical patent/FR1271303A/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
    • G02B15/143—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)
FR837656A 1959-09-03 1960-09-02 Improvements to Variable Focal Length Optical Lenses Expired FR1271303A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR837656A FR1271303A (en) 1959-09-03 1960-09-02 Improvements to Variable Focal Length Optical Lenses

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
FR837656A FR1271303A (en) 1959-09-03 1960-09-02 Improvements to Variable Focal Length Optical Lenses

Publications (1)

Publication Number Publication Date
FR1271303A true FR1271303A (en) 1961-09-08

Family

ID=26187341

Family Applications (1)

Application Number Title Priority Date Filing Date
FR837656A Expired FR1271303A (en) 1959-09-03 1960-09-02 Improvements to Variable Focal Length Optical Lenses

Country Status (1)

Country Link
FR (1) FR1271303A (en)

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