GB1214341A - Improvements in or relating to objectives of variable focal length - Google Patents

Improvements in or relating to objectives of variable focal length

Info

Publication number
GB1214341A
GB1214341A GB26981/68A GB2698168A GB1214341A GB 1214341 A GB1214341 A GB 1214341A GB 26981/68 A GB26981/68 A GB 26981/68A GB 2698168 A GB2698168 A GB 2698168A GB 1214341 A GB1214341 A GB 1214341A
Authority
GB
United Kingdom
Prior art keywords
focal length
objectives
relating
variable focal
june
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
GB26981/68A
Other languages
English (en)
Inventor
Gordon Henry Cook
Francois Rene Laurent
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.)
Rank Organization Ltd
Original Assignee
Rank Organization Ltd
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 Rank Organization Ltd filed Critical Rank Organization Ltd
Priority to GB26981/68A priority Critical patent/GB1214341A/en
Priority to DE19691928692 priority patent/DE1928692A1/de
Priority to FR6918669A priority patent/FR2010288A1/fr
Priority to SU1334646A priority patent/SU440006A3/ru
Publication of GB1214341A publication Critical patent/GB1214341A/en
Priority to US104975A priority patent/US3682534A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
  • Telescopes (AREA)
  • Lens Barrels (AREA)
GB26981/68A 1968-06-06 1968-06-06 Improvements in or relating to objectives of variable focal length Expired GB1214341A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB26981/68A GB1214341A (en) 1968-06-06 1968-06-06 Improvements in or relating to objectives of variable focal length
DE19691928692 DE1928692A1 (de) 1968-06-06 1969-06-06 Objektiv mit veraenderbarer Brennweite
FR6918669A FR2010288A1 (enExample) 1968-06-06 1969-06-06
SU1334646A SU440006A3 (ru) 1968-06-06 1969-06-06 Объектив с переменным фокусным расстоянием
US104975A US3682534A (en) 1968-06-06 1971-01-08 Objectives of variable focal length

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB26981/68A GB1214341A (en) 1968-06-06 1968-06-06 Improvements in or relating to objectives of variable focal length

Publications (1)

Publication Number Publication Date
GB1214341A true GB1214341A (en) 1970-12-02

Family

ID=10252248

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26981/68A Expired GB1214341A (en) 1968-06-06 1968-06-06 Improvements in or relating to objectives of variable focal length

Country Status (5)

Country Link
US (1) US3682534A (enExample)
DE (1) DE1928692A1 (enExample)
FR (1) FR2010288A1 (enExample)
GB (1) GB1214341A (enExample)
SU (1) SU440006A3 (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5264965A (en) * 1991-02-15 1993-11-23 Asahi Kogaku Kogyo Kabushiki Kaisha Zoom lens

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2106359B1 (enExample) * 1970-09-08 1975-04-18 Eastman Kodak Co
JPS594688B2 (ja) * 1976-03-11 1984-01-31 キヤノン株式会社 ズ−ムレンズ
JPS5567717A (en) * 1978-11-17 1980-05-22 Canon Inc Focusing method which prevents change in angle of view
DE2950951A1 (de) * 1978-12-25 1980-07-10 Canon Kk Photographisches objektiv mit stabilisierung gegen eine bildwinkelaenderung waehrend des fokussierens
JPS5915214A (ja) * 1982-07-17 1984-01-26 Canon Inc ズ−ムレンズのフオ−カシング方法
US4756609A (en) * 1987-07-13 1988-07-12 Eastman Kodak Company Four component compact zoom lens
US5416639A (en) * 1991-06-29 1995-05-16 Olympus Optical Co., Ltd. Zoom lens system
JP4156777B2 (ja) 2000-05-23 2008-09-24 オリンパス株式会社 ズームレンズ
CN203930190U (zh) 2011-10-20 2014-11-05 富士胶片株式会社 投影用变焦镜头和投影型显示设备
DE102012214303B9 (de) 2012-08-10 2022-07-07 Carl Zeiss Ag Optisches System zur Abbildung eines Objekts sowie Aufnahmeeinheit mit einem optischen System
US9341827B2 (en) 2013-04-04 2016-05-17 Cooke Optics Limited Anamorphic objective lens

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3481664A (en) * 1965-09-01 1969-12-02 Canon Kk Large aperture and wide angle zoom lens system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5264965A (en) * 1991-02-15 1993-11-23 Asahi Kogaku Kogyo Kabushiki Kaisha Zoom lens

Also Published As

Publication number Publication date
FR2010288A1 (enExample) 1970-02-13
DE1928692A1 (de) 1970-01-02
SU440006A3 (ru) 1974-08-15
US3682534A (en) 1972-08-08

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees