CH380406A - Objectif optique à longueur focale variable - Google Patents
Objectif optique à longueur focale variableInfo
- Publication number
- CH380406A CH380406A CH992360A CH992360A CH380406A CH 380406 A CH380406 A CH 380406A CH 992360 A CH992360 A CH 992360A CH 992360 A CH992360 A CH 992360A CH 380406 A CH380406 A CH 380406A
- Authority
- CH
- Switzerland
- Prior art keywords
- focal length
- optical lens
- variable focal
- length optical
- variable
- Prior art date
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
- G02B15/143—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 three groups only
- G02B15/1431—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 three groups only the first group being positive
- G02B15/143105—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 three groups only the first group being positive arranged +-+
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
- Lens Barrels (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB30034/59A GB953864A (en) | 1959-09-03 | 1959-09-03 | Improvements in or relating to optical objectives of variable focal length |
Publications (1)
Publication Number | Publication Date |
---|---|
CH380406A true CH380406A (fr) | 1964-07-31 |
Family
ID=10301203
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH992260A CH373905A (fr) | 1959-09-03 | 1960-09-02 | Objectif optique à longueur focale variable |
CH992360A CH380406A (fr) | 1959-09-03 | 1960-09-02 | Objectif optique à longueur focale variable |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH992260A CH373905A (fr) | 1959-09-03 | 1960-09-02 | Objectif optique à longueur focale variable |
Country Status (4)
Country | Link |
---|---|
US (1) | US3191496A (fr) |
CH (2) | CH373905A (fr) |
GB (2) | GB953864A (fr) |
NL (2) | NL255488A (fr) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1260292B (de) * | 1966-03-12 | 1968-02-01 | Schneider Co Optische Werke | Verstelleinrichtung fuer optische Apparate, insbesondere fuer Objektive mit veraenderlicher Brennweite |
US4297007A (en) * | 1979-04-24 | 1981-10-27 | Polaroid Corporation | Optical apparatus and method for changing a zoom camera to a fixed focus camera |
JPS574018A (en) * | 1980-06-10 | 1982-01-09 | Konishiroku Photo Ind Co Ltd | Focusing system for zoom lens |
US5727236A (en) * | 1994-06-30 | 1998-03-10 | Frazier; James A. | Wide angle, deep field, close focusing optical system |
CA2270451A1 (fr) | 1998-06-17 | 1999-12-17 | Wolfgang Weigel | Systeme optique d'appoint pour appareil photo |
JP2012032597A (ja) | 2010-07-30 | 2012-02-16 | Canon Inc | 光学装置 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2165341A (en) * | 1936-07-28 | 1939-07-11 | Eastman Kodak Co | Photographic objective |
FR1120271A (fr) * | 1955-01-24 | 1956-07-03 | Objectif à longueur focale variable | |
US2913957A (en) * | 1958-06-27 | 1959-11-24 | Frank G Back | Varifocal lens assembly |
DE1086062B (de) * | 1958-09-17 | 1960-07-28 | Zeiss Carl Fa | Photographisches Objektiv mit kontinuierlich veraenderlicher Brennweite |
-
0
- NL NL255490D patent/NL255490A/xx unknown
- NL NL255488D patent/NL255488A/xx unknown
-
1959
- 1959-09-03 GB GB30034/59A patent/GB953864A/en not_active Expired
- 1959-09-03 GB GB30046/59A patent/GB953865A/en not_active Expired
-
1960
- 1960-09-01 US US53413A patent/US3191496A/en not_active Expired - Lifetime
- 1960-09-02 CH CH992260A patent/CH373905A/fr unknown
- 1960-09-02 CH CH992360A patent/CH380406A/fr unknown
Also Published As
Publication number | Publication date |
---|---|
CH373905A (fr) | 1963-12-15 |
NL255490A (fr) | |
GB953864A (en) | 1964-04-02 |
US3191496A (en) | 1965-06-29 |
GB953865A (en) | 1964-04-02 |
NL255488A (fr) |
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