FR1380830A - Very bright projection lens with variable focal length - Google Patents

Very bright projection lens with variable focal length

Info

Publication number
FR1380830A
FR1380830A FR955566A FR955566A FR1380830A FR 1380830 A FR1380830 A FR 1380830A FR 955566 A FR955566 A FR 955566A FR 955566 A FR955566 A FR 955566A FR 1380830 A FR1380830 A FR 1380830A
Authority
FR
France
Prior art keywords
focal length
projection lens
variable focal
bright projection
bright
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
FR955566A
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.)
Agfa Gevaert NV
Original Assignee
Agfa AG
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 DEA41769A external-priority patent/DE1187825B/en
Application filed by Agfa AG filed Critical Agfa AG
Priority to FR955566A priority Critical patent/FR1380830A/en
Application granted granted Critical
Publication of FR1380830A publication Critical patent/FR1380830A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR955566A 1962-12-01 1963-11-29 Very bright projection lens with variable focal length Expired FR1380830A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR955566A FR1380830A (en) 1962-12-01 1963-11-29 Very bright projection lens with variable focal length

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEA41769A DE1187825B (en) 1962-12-01 1962-12-01 Bright projection lens with variable focal length
FR955566A FR1380830A (en) 1962-12-01 1963-11-29 Very bright projection lens with variable focal length

Publications (1)

Publication Number Publication Date
FR1380830A true FR1380830A (en) 1964-12-04

Family

ID=25963841

Family Applications (1)

Application Number Title Priority Date Filing Date
FR955566A Expired FR1380830A (en) 1962-12-01 1963-11-29 Very bright projection lens with variable focal length

Country Status (1)

Country Link
FR (1) FR1380830A (en)

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