ZA72613B - A lens focusing mechanism - Google Patents

A lens focusing mechanism

Info

Publication number
ZA72613B
ZA72613B ZA720613A ZA72613A ZA72613B ZA 72613 B ZA72613 B ZA 72613B ZA 720613 A ZA720613 A ZA 720613A ZA 72613 A ZA72613 A ZA 72613A ZA 72613 B ZA72613 B ZA 72613B
Authority
ZA
South Africa
Prior art keywords
focusing mechanism
lens focusing
lens
focusing
Prior art date
Application number
ZA720613A
Other languages
English (en)
Inventor
W Schutrum
R Funkhouser
Original Assignee
Ncr
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 filed Critical Ncr
Publication of ZA72613B publication Critical patent/ZA72613B/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)
ZA720613A 1971-02-25 1972-01-31 A lens focusing mechanism ZA72613B (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
ZA72613B true ZA72613B (en) 1972-10-25

Family

ID=22380924

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA720613A ZA72613B (en) 1971-02-25 1972-01-31 A lens focusing mechanism

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
US3717400A (en) 1973-02-20
DK144253C (da) 1982-06-21
JPS523579B1 (it) 1977-01-28
CH543099A (de) 1973-10-15
ES400098A1 (es) 1974-12-16
FR2126374A1 (it) 1972-10-06
BE779755A (fr) 1972-06-16
GB1325985A (en) 1973-08-08
IT947867B (it) 1973-05-30
DK144253B (da) 1982-01-25
DE2207606B2 (de) 1980-04-10
DE2207606A1 (de) 1972-09-07
FR2126374B1 (it) 1976-01-16
CA971785A (en) 1975-07-29

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