[go: up one dir, main page]

FR1404284A - Vari-focal lens with large aperture and large variation ratio - Google Patents

Vari-focal lens with large aperture and large variation ratio

Info

Publication number
FR1404284A
FR1404284A FR985259A FR985259A FR1404284A FR 1404284 A FR1404284 A FR 1404284A FR 985259 A FR985259 A FR 985259A FR 985259 A FR985259 A FR 985259A FR 1404284 A FR1404284 A FR 1404284A
Authority
FR
France
Prior art keywords
vari
focal lens
variation ratio
aperture
large aperture
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
FR985259A
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.)
Nikon Corp
Original Assignee
Nippon Kogaku KK
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 Nippon Kogaku KK filed Critical Nippon Kogaku KK
Priority to FR985259A priority Critical patent/FR1404284A/en
Application granted granted Critical
Publication of FR1404284A publication Critical patent/FR1404284A/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
    • G02B15/144113—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 arranged +-++

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR985259A 1963-08-27 1964-08-14 Vari-focal lens with large aperture and large variation ratio Expired FR1404284A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR985259A FR1404284A (en) 1963-08-27 1964-08-14 Vari-focal lens with large aperture and large variation ratio

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP4507763 1963-08-27
FR985259A FR1404284A (en) 1963-08-27 1964-08-14 Vari-focal lens with large aperture and large variation ratio

Publications (1)

Publication Number Publication Date
FR1404284A true FR1404284A (en) 1965-06-25

Family

ID=26209465

Family Applications (1)

Application Number Title Priority Date Filing Date
FR985259A Expired FR1404284A (en) 1963-08-27 1964-08-14 Vari-focal lens with large aperture and large variation ratio

Country Status (1)

Country Link
FR (1) FR1404284A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4198127A (en) * 1977-12-02 1980-04-15 Asahi Kogaku Kogyo Kabushiki Kaisha Wide angle zoom lens system having small distortion
US4380376A (en) * 1979-06-18 1983-04-19 Canon Kabushiki Kaisha Zoom objective
US4515446A (en) * 1981-12-29 1985-05-07 Canon Kabushiki Kaisha Zoom objective

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4198127A (en) * 1977-12-02 1980-04-15 Asahi Kogaku Kogyo Kabushiki Kaisha Wide angle zoom lens system having small distortion
US4380376A (en) * 1979-06-18 1983-04-19 Canon Kabushiki Kaisha Zoom objective
US4515446A (en) * 1981-12-29 1985-05-07 Canon Kabushiki Kaisha Zoom objective

Similar Documents

Publication Publication Date Title
FR1398210A (en) Variable ratio transmission
CH381878A (en) Vari-focal lens
CH417141A (en) Lens with variable focal length, large aperture and large focal length range
AT245821B (en) Lens with variable focal length
FR1509262A (en) Large aperture microscope objective
FR1404284A (en) Vari-focal lens with large aperture and large variation ratio
CH481390A (en) Vari-focal lens
FR1543304A (en) Insulator with variable flexibility and damping
FR1499093A (en) Large aperture hollow cathode
FR1408066A (en) Wide angle lens with large aperture
FR1380792A (en) Wide angle lens with large relative aperture
FR1443391A (en) Improvements in cable manufacturing
FR1354067A (en) Large span bridge
CH477131A (en) Static element with logical function
FR1384153A (en) Large aperture gauss type lens
FR1547509A (en) Microphone with changeable one-sided directional characteristic
FR1477856A (en) Variable ratio transmission mechanism
FR1346238A (en) Large opening headlock
FR1377796A (en) Cinematographic camera with incorporated photometer
FR1204816A (en) Large aperture lens
FR1407593A (en) High brightness varifocal lens
FR1442171A (en) Variable ratio transmission
FR1371676A (en) Vari-focal lens
CH380407A (en) Vari-focal lens
CH472152A (en) Ternary decoder with nonlinear characteristic