BE779755A - Mecanisme destine a la focalisation de lentilles - Google Patents

Mecanisme destine a la focalisation de lentilles

Info

Publication number
BE779755A
BE779755A BE779755A BE779755A BE779755A BE 779755 A BE779755 A BE 779755A BE 779755 A BE779755 A BE 779755A BE 779755 A BE779755 A BE 779755A BE 779755 A BE779755 A BE 779755A
Authority
BE
Belgium
Prior art keywords
lenses
focusing
Prior art date
Application number
BE779755A
Other languages
English (en)
French (fr)
Inventor
W L Schutrum
R L Funkhouser
Original Assignee
Ncr Co
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 Ncr Co filed Critical Ncr Co
Publication of BE779755A publication Critical patent/BE779755A/xx

Links

Classifications

    • 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
    • G03B21/10—Projectors with built-in or built-on screen
    • G03B21/11—Projectors with built-in or built-on screen for microfilm reading
    • 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)
  • Variable Magnification In Projection-Type Copying Machines (AREA)
  • Projection Apparatus (AREA)
  • Lens Barrels (AREA)
  • Structure And Mechanism Of Cameras (AREA)
  • Projection-Type Copiers In General (AREA)
BE779755A 1971-02-25 1972-02-24 Mecanisme destine a la focalisation de lentilles BE779755A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11881871A 1971-02-25 1971-02-25

Publications (1)

Publication Number Publication Date
BE779755A true BE779755A (fr) 1972-06-16

Family

ID=22380924

Family Applications (1)

Application Number Title Priority Date Filing Date
BE779755A BE779755A (fr) 1971-02-25 1972-02-24 Mecanisme destine a la focalisation de lentilles

Country Status (12)

Country Link
US (1) US3717400A (it)
JP (1) JPS523579B1 (it)
BE (1) BE779755A (it)
CA (1) CA971785A (it)
CH (1) CH543099A (it)
DE (1) DE2207606B2 (it)
DK (1) DK144253C (it)
ES (1) ES400098A1 (it)
FR (1) FR2126374B1 (it)
GB (1) GB1325985A (it)
IT (1) IT947867B (it)
ZA (1) ZA72613B (it)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3439254A1 (de) * 1984-10-26 1986-04-30 MAP Mikrofilm Apparatebau Dr. Poehler GmbH & Co KG, 6352 Ober-Mörlen Objektivhalterung
US6324021B1 (en) 1999-09-09 2001-11-27 Lorvel J. Shields Focusing system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2908209A (en) * 1957-09-23 1959-10-13 Eastman Kodak Co Lens focusing mechanism for cameras
US3604795A (en) * 1968-05-20 1971-09-14 Eastman Kodak Co Image projection system

Also Published As

Publication number Publication date
DE2207606A1 (de) 1972-09-07
US3717400A (en) 1973-02-20
CA971785A (en) 1975-07-29
DE2207606B2 (de) 1980-04-10
FR2126374B1 (it) 1976-01-16
DK144253C (da) 1982-06-21
ES400098A1 (es) 1974-12-16
CH543099A (de) 1973-10-15
FR2126374A1 (it) 1972-10-06
DK144253B (da) 1982-01-25
ZA72613B (en) 1972-10-25
IT947867B (it) 1973-05-30
GB1325985A (en) 1973-08-08
JPS523579B1 (it) 1977-01-28

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: THE NATIONAL CASH REGISTER CY

Effective date: 19850224