FR1553144A - - Google Patents

Info

Publication number
FR1553144A
FR1553144A FR1553144DA FR1553144A FR 1553144 A FR1553144 A FR 1553144A FR 1553144D A FR1553144D A FR 1553144DA FR 1553144 A FR1553144 A FR 1553144A
Authority
FR
France
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
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 filed Critical
Application granted granted Critical
Publication of FR1553144A publication Critical patent/FR1553144A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/40—Optical focusing aids
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/53—Means for automatic focusing, e.g. to compensate thermal effects

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Projection Apparatus (AREA)
  • Focusing (AREA)
FR1553144D 1966-12-05 1967-12-05 Expired FR1553144A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US59924466A 1966-12-05 1966-12-05

Publications (1)

Publication Number Publication Date
FR1553144A true FR1553144A (fr) 1969-01-10

Family

ID=24398858

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1553144D Expired FR1553144A (fr) 1966-12-05 1967-12-05

Country Status (5)

Country Link
US (1) US3471225A (fr)
CH (2) CH470679A (fr)
DE (1) DE1597204B2 (fr)
FR (1) FR1553144A (fr)
GB (1) GB1199638A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107809628A (zh) * 2017-05-12 2018-03-16 杭州隅千象科技有限公司 多方向环幕全覆盖的投影方法、投影仪及投影系统

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2121379C3 (de) * 1971-04-30 1979-10-18 Heinz 3000 Hannover Preuss Audiovisuelles Wiedergabegerät und dafür bestimmte Bild-Ton-Platte
US6778277B2 (en) * 2001-05-24 2004-08-17 Eastman Kodak Company Apparatus and method to measure film motion in a film gate
CN103605254B (zh) * 2013-11-25 2015-10-07 广东威创视讯科技股份有限公司 投影机液冷系统加液及告警时间确定方法及装置
CN108873575B (zh) * 2018-06-27 2020-10-20 苏州佳世达光电有限公司 镜头调焦装置及投影机

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR903962A (fr) * 1943-05-04 1945-10-23 Tobis Tonbild Syndikat Gmbh Procédé de contrôle de la position du film dans les appareils de projection des films à images
US2563892A (en) * 1946-12-14 1951-08-14 Waller Fred Apparatus for locating images on screens
GB823404A (en) * 1956-07-13 1959-11-11 Essoldomatic Ltd Improvements in motion picture projection apparatus
US3249006A (en) * 1964-04-14 1966-05-03 Honeywell Inc Automatic focusing photographic projector
US3326081A (en) * 1965-02-15 1967-06-20 Eastman Kodak Co Automatic focussing slide projector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107809628A (zh) * 2017-05-12 2018-03-16 杭州隅千象科技有限公司 多方向环幕全覆盖的投影方法、投影仪及投影系统
CN107809628B (zh) * 2017-05-12 2024-05-28 杭州一隅千象科技有限公司 多方向环幕全覆盖的投影方法、投影仪及投影系统

Also Published As

Publication number Publication date
CH470679A (fr) 1969-03-31
DE1597204A1 (de) 1970-04-02
US3471225A (en) 1969-10-07
DE1597204B2 (de) 1975-12-04
GB1199638A (en) 1970-07-22
CH475571A (fr) 1969-07-15

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Legal Events

Date Code Title Description
ST Notification of lapse