FR2469728A3 - Objectif de projection a distance focale reglable par echelons - Google Patents

Objectif de projection a distance focale reglable par echelons Download PDF

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Publication number
FR2469728A3
FR2469728A3 FR7927661A FR7927661A FR2469728A3 FR 2469728 A3 FR2469728 A3 FR 2469728A3 FR 7927661 A FR7927661 A FR 7927661A FR 7927661 A FR7927661 A FR 7927661A FR 2469728 A3 FR2469728 A3 FR 2469728A3
Authority
FR
France
Prior art keywords
lens
free interval
doublet
group
focal length
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.)
Granted
Application number
FR7927661A
Other languages
English (en)
French (fr)
Other versions
FR2469728B3 (OSRAM
Inventor
Ladislav Pospisil
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 FR7927661A priority Critical patent/FR2469728A3/fr
Publication of FR2469728A3 publication Critical patent/FR2469728A3/fr
Application granted granted Critical
Publication of FR2469728B3 publication Critical patent/FR2469728B3/fr
Granted legal-status Critical Current

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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)
  • Lenses (AREA)
FR7927661A 1979-11-09 1979-11-09 Objectif de projection a distance focale reglable par echelons Granted FR2469728A3 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7927661A FR2469728A3 (fr) 1979-11-09 1979-11-09 Objectif de projection a distance focale reglable par echelons

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7927661A FR2469728A3 (fr) 1979-11-09 1979-11-09 Objectif de projection a distance focale reglable par echelons

Publications (2)

Publication Number Publication Date
FR2469728A3 true FR2469728A3 (fr) 1981-05-22
FR2469728B3 FR2469728B3 (OSRAM) 1981-10-16

Family

ID=9231488

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7927661A Granted FR2469728A3 (fr) 1979-11-09 1979-11-09 Objectif de projection a distance focale reglable par echelons

Country Status (1)

Country Link
FR (1) FR2469728A3 (OSRAM)

Also Published As

Publication number Publication date
FR2469728B3 (OSRAM) 1981-10-16

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