CA1023982A - Ensemble de lentilles zoom - Google Patents

Ensemble de lentilles zoom

Info

Publication number
CA1023982A
CA1023982A CA208,624A CA208624A CA1023982A CA 1023982 A CA1023982 A CA 1023982A CA 208624 A CA208624 A CA 208624A CA 1023982 A CA1023982 A CA 1023982A
Authority
CA
Canada
Prior art keywords
zoom lens
lens assembly
assembly
zoom
lens
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
CA208,624A
Other languages
English (en)
Other versions
CA208624S (en
Inventor
Wai-Min Liu
Roscoe J. Donnel
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.)
Xerox Corp
Original Assignee
Xerox Corp
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 Xerox Corp filed Critical Xerox Corp
Application granted granted Critical
Publication of CA1023982A publication Critical patent/CA1023982A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/24—Optical objectives specially designed for the purposes specified below for reproducing or copying at short object distances
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
CA208,624A 1973-10-15 1974-09-06 Ensemble de lentilles zoom Expired CA1023982A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US406734A US3880498A (en) 1973-10-15 1973-10-15 Zoom lens assembly

Publications (1)

Publication Number Publication Date
CA1023982A true CA1023982A (fr) 1978-01-10

Family

ID=23609240

Family Applications (1)

Application Number Title Priority Date Filing Date
CA208,624A Expired CA1023982A (fr) 1973-10-15 1974-09-06 Ensemble de lentilles zoom

Country Status (2)

Country Link
US (1) US3880498A (fr)
CA (1) CA1023982A (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1523492A (en) * 1974-12-28 1978-09-06 Nippon Kogaku Kk Zoom lens system
US4159865A (en) * 1975-08-22 1979-07-03 Canon Kabushiki Kaisha Zoom lens system
JPS5695211A (en) * 1979-12-28 1981-08-01 Nippon Kogaku Kk <Nikon> Wide angle zoom lens
JPS5767908A (en) * 1980-10-14 1982-04-24 Canon Inc Wide-angle zoom lens
JPS5768873A (en) * 1980-10-18 1982-04-27 Asahi Optical Co Ltd Variable scale factor copying optical device which is capable of magnification and reduction
US5301065A (en) * 1992-09-04 1994-04-05 Industrial Technology Research Institute Compact zoom lens system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3630599A (en) * 1970-10-21 1971-12-28 Xerox Corp Mechanically compensated zoom lens system

Also Published As

Publication number Publication date
US3880498A (en) 1975-04-29

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