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FR1485148A - Enhancements to Variable Equivalent Focal Length Optical Lenses - Google Patents

Enhancements to Variable Equivalent Focal Length Optical Lenses

Info

Publication number
FR1485148A
FR1485148A FR67452A FR67452A FR1485148A FR 1485148 A FR1485148 A FR 1485148A FR 67452 A FR67452 A FR 67452A FR 67452 A FR67452 A FR 67452A FR 1485148 A FR1485148 A FR 1485148A
Authority
FR
France
Prior art keywords
enhancements
focal length
optical lenses
length optical
equivalent focal
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
FR67452A
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 Organization Ltd
Original Assignee
Rank Organization 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
Application filed by Rank Organization Ltd filed Critical Rank Organization Ltd
Priority to FR67452A priority Critical patent/FR1485148A/en
Application granted granted Critical
Publication of FR1485148A publication Critical patent/FR1485148A/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
    • G02B15/144—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 four groups only
    • G02B15/1441—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 four groups only the first group being positive
    • G02B15/144109—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 four groups only the first group being positive arranged +--+

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR67452A 1965-06-29 1966-06-29 Enhancements to Variable Equivalent Focal Length Optical Lenses Expired FR1485148A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR67452A FR1485148A (en) 1965-06-29 1966-06-29 Enhancements to Variable Equivalent Focal Length Optical Lenses

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2752665 1965-06-29
FR67452A FR1485148A (en) 1965-06-29 1966-06-29 Enhancements to Variable Equivalent Focal Length Optical Lenses

Publications (1)

Publication Number Publication Date
FR1485148A true FR1485148A (en) 1967-06-16

Family

ID=26171655

Family Applications (1)

Application Number Title Priority Date Filing Date
FR67452A Expired FR1485148A (en) 1965-06-29 1966-06-29 Enhancements to Variable Equivalent Focal Length Optical Lenses

Country Status (1)

Country Link
FR (1) FR1485148A (en)

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