IT947867B - Meccanismo per la messa a fuoco di lenti - Google Patents

Meccanismo per la messa a fuoco di lenti

Info

Publication number
IT947867B
IT947867B IT20993/72A IT2099372A IT947867B IT 947867 B IT947867 B IT 947867B IT 20993/72 A IT20993/72 A IT 20993/72A IT 2099372 A IT2099372 A IT 2099372A IT 947867 B IT947867 B IT 947867B
Authority
IT
Italy
Prior art keywords
focusing lenses
lenses
focusing
Prior art date
Application number
IT20993/72A
Other languages
English (en)
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
Application granted granted Critical
Publication of IT947867B publication Critical patent/IT947867B/it

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)
  • Projection-Type Copiers In General (AREA)
  • Structure And Mechanism Of Cameras (AREA)
IT20993/72A 1971-02-25 1972-02-24 Meccanismo per la messa a fuoco di lenti IT947867B (it)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
IT947867B true IT947867B (it) 1973-05-30

Family

ID=22380924

Family Applications (1)

Application Number Title Priority Date Filing Date
IT20993/72A IT947867B (it) 1971-02-25 1972-02-24 Meccanismo per la messa a fuoco di lenti

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
CA971785A (en) 1975-07-29
DE2207606A1 (de) 1972-09-07
ZA72613B (en) 1972-10-25
ES400098A1 (es) 1974-12-16
CH543099A (de) 1973-10-15
BE779755A (fr) 1972-06-16
FR2126374B1 (it) 1976-01-16
DE2207606B2 (de) 1980-04-10
JPS523579B1 (it) 1977-01-28
FR2126374A1 (it) 1972-10-06
DK144253C (da) 1982-06-21
US3717400A (en) 1973-02-20
DK144253B (da) 1982-01-25
GB1325985A (en) 1973-08-08

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