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FR1114644A - Improvement in projection objectives - Google Patents

Improvement in projection objectives

Info

Publication number
FR1114644A
FR1114644A FR1114644DA FR1114644A FR 1114644 A FR1114644 A FR 1114644A FR 1114644D A FR1114644D A FR 1114644DA FR 1114644 A FR1114644 A FR 1114644A
Authority
FR
France
Prior art keywords
improvement
projection objectives
objectives
projection
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
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.)
PHYSIQUE ET IND
Original Assignee
PHYSIQUE ET IND
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 PHYSIQUE ET IND filed Critical PHYSIQUE ET IND
Application granted granted Critical
Publication of FR1114644A publication Critical patent/FR1114644A/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
    • G02B15/142—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 two groups only
    • G02B15/1421—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 two groups only the first group being positive

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR1114644D 1954-11-19 1954-11-19 Improvement in projection objectives Expired FR1114644A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1114644T 1954-11-19

Publications (1)

Publication Number Publication Date
FR1114644A true FR1114644A (en) 1956-04-16

Family

ID=9628467

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1114644D Expired FR1114644A (en) 1954-11-19 1954-11-19 Improvement in projection objectives

Country Status (1)

Country Link
FR (1) FR1114644A (en)

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