FR2343268A1 - Objectif a distance focale variable - Google Patents

Objectif a distance focale variable

Info

Publication number
FR2343268A1
FR2343268A1 FR7705943A FR7705943A FR2343268A1 FR 2343268 A1 FR2343268 A1 FR 2343268A1 FR 7705943 A FR7705943 A FR 7705943A FR 7705943 A FR7705943 A FR 7705943A FR 2343268 A1 FR2343268 A1 FR 2343268A1
Authority
FR
France
Prior art keywords
focal distance
variable focal
distance lens
lens
variable
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
FR7705943A
Other languages
English (en)
French (fr)
Other versions
FR2343268B1 (nl
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
Priority claimed from US05/663,394 external-priority patent/US4056308A/en
Priority claimed from US05/663,397 external-priority patent/US4061419A/en
Application filed by Xerox Corp filed Critical Xerox Corp
Publication of FR2343268A1 publication Critical patent/FR2343268A1/fr
Application granted granted Critical
Publication of FR2343268B1 publication Critical patent/FR2343268B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/08—Catadioptric systems
    • G02B17/0896—Catadioptric systems with variable magnification or multiple imaging planes, including multispectral systems
    • 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
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/008—Systems specially adapted to form image relays or chained systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/08—Catadioptric systems

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Lenses (AREA)
FR7705943A 1976-03-03 1977-03-01 Objectif a distance focale variable Granted FR2343268A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/663,394 US4056308A (en) 1976-03-03 1976-03-03 Variable focal length reflector lens system
US05/663,397 US4061419A (en) 1976-03-03 1976-03-03 Variable magnification lens system

Publications (2)

Publication Number Publication Date
FR2343268A1 true FR2343268A1 (fr) 1977-09-30
FR2343268B1 FR2343268B1 (nl) 1980-09-12

Family

ID=27098728

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7705943A Granted FR2343268A1 (fr) 1976-03-03 1977-03-01 Objectif a distance focale variable

Country Status (5)

Country Link
CH (1) CH611717A5 (nl)
DE (1) DE2703914C2 (nl)
FR (1) FR2343268A1 (nl)
GB (1) GB1553054A (nl)
NL (1) NL7702191A (nl)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2849128A1 (de) * 1977-11-15 1979-05-17 Gretag Ag Zoom-objektiv

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2045760A1 (nl) * 1969-04-02 1971-03-05 Eastman Kodak Co
FR2061647A1 (nl) * 1969-09-10 1971-06-25 Xerox Corp
US3659922A (en) * 1971-02-25 1972-05-02 Xerox Corp Symmetrical half-lens optical system
US3687522A (en) * 1971-02-01 1972-08-29 Ilex Optical Co Inc Variable magnification lens system for finite conjugate distances
US3865471A (en) * 1974-01-02 1975-02-11 Xerox Corp Lens system for photoelectrophoretic copying machine
US3871749A (en) * 1972-06-20 1975-03-18 Olympus Optical Co Lens system having magnification {33 1

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2045760A1 (nl) * 1969-04-02 1971-03-05 Eastman Kodak Co
FR2061647A1 (nl) * 1969-09-10 1971-06-25 Xerox Corp
US3687522A (en) * 1971-02-01 1972-08-29 Ilex Optical Co Inc Variable magnification lens system for finite conjugate distances
US3659922A (en) * 1971-02-25 1972-05-02 Xerox Corp Symmetrical half-lens optical system
US3871749A (en) * 1972-06-20 1975-03-18 Olympus Optical Co Lens system having magnification {33 1
US3865471A (en) * 1974-01-02 1975-02-11 Xerox Corp Lens system for photoelectrophoretic copying machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2849128A1 (de) * 1977-11-15 1979-05-17 Gretag Ag Zoom-objektiv

Also Published As

Publication number Publication date
DE2703914C2 (de) 1986-06-26
DE2703914A1 (de) 1977-09-08
CH611717A5 (en) 1979-06-15
NL7702191A (nl) 1977-09-06
FR2343268B1 (nl) 1980-09-12
GB1553054A (en) 1979-09-19

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Legal Events

Date Code Title Description
ST Notification of lapse