FR85460E - Objectif de projection à distance focale progressivement variable - Google Patents

Objectif de projection à distance focale progressivement variable

Info

Publication number
FR85460E
FR85460E FR966651A FR966651A FR85460E FR 85460 E FR85460 E FR 85460E FR 966651 A FR966651 A FR 966651A FR 966651 A FR966651 A FR 966651A FR 85460 E FR85460 E FR 85460E
Authority
FR
France
Prior art keywords
focal length
projection lens
variable focal
progressively variable
progressively
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
FR966651A
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.)
Meopta np
Original Assignee
Meopta np
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 Meopta np filed Critical Meopta np
Priority to FR966651A priority Critical patent/FR85460E/fr
Application granted granted Critical
Publication of FR85460E publication Critical patent/FR85460E/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
    • G02B15/1435—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 negative
    • G02B15/143507—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 negative arranged -++

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR966651A 1961-10-16 1964-03-09 Objectif de projection à distance focale progressivement variable Expired FR85460E (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR966651A FR85460E (fr) 1961-10-16 1964-03-09 Objectif de projection à distance focale progressivement variable

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CS611161 1961-10-16
CS306563 1963-05-28
FR966651A FR85460E (fr) 1961-10-16 1964-03-09 Objectif de projection à distance focale progressivement variable

Publications (1)

Publication Number Publication Date
FR85460E true FR85460E (fr) 1965-08-20

Family

ID=27179407

Family Applications (1)

Application Number Title Priority Date Filing Date
FR966651A Expired FR85460E (fr) 1961-10-16 1964-03-09 Objectif de projection à distance focale progressivement variable

Country Status (1)

Country Link
FR (1) FR85460E (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4779969A (en) * 1985-07-03 1988-10-25 Canon Kabushiki Kaisha Finding device of variable magnification

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4779969A (en) * 1985-07-03 1988-10-25 Canon Kabushiki Kaisha Finding device of variable magnification

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