GB2101303B - Automatic focussing for slide projectors - Google Patents

Automatic focussing for slide projectors

Info

Publication number
GB2101303B
GB2101303B GB08214714A GB8214714A GB2101303B GB 2101303 B GB2101303 B GB 2101303B GB 08214714 A GB08214714 A GB 08214714A GB 8214714 A GB8214714 A GB 8214714A GB 2101303 B GB2101303 B GB 2101303B
Authority
GB
United Kingdom
Prior art keywords
slide projectors
automatic focussing
focussing
automatic
projectors
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
GB08214714A
Other versions
GB2101303A (en
Inventor
Norbert Langer
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.)
KINDERMANN AND CO GmbH
Original Assignee
KINDERMANN AND CO GmbH
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 KINDERMANN AND CO GmbH filed Critical KINDERMANN AND CO GmbH
Publication of GB2101303A publication Critical patent/GB2101303A/en
Application granted granted Critical
Publication of GB2101303B publication Critical patent/GB2101303B/en
Expired legal-status Critical Current

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
    • G03B21/14—Details
    • G03B21/53—Means for automatic focusing, e.g. to compensate thermal effects

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)
  • Microscoopes, Condenser (AREA)
GB08214714A 1981-05-25 1982-05-20 Automatic focussing for slide projectors Expired GB2101303B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19813120816 DE3120816A1 (en) 1981-05-25 1981-05-25 "METHOD AND DEVICE FOR AUTOMATIC FOCUSING FOR IMAGE PROJECTORS, FOR EXAMPLE DIAPROJECTORS"

Publications (2)

Publication Number Publication Date
GB2101303A GB2101303A (en) 1983-01-12
GB2101303B true GB2101303B (en) 1985-09-25

Family

ID=6133198

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08214714A Expired GB2101303B (en) 1981-05-25 1982-05-20 Automatic focussing for slide projectors

Country Status (3)

Country Link
DE (1) DE3120816A1 (en)
FR (1) FR2506469B1 (en)
GB (1) GB2101303B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3310601C2 (en) * 1982-03-24 1994-02-10 Canon Kk Distance measuring device
GB2143396B (en) * 1983-05-21 1987-06-17 Mac Co Ltd Beam riding location system
DE3400562C2 (en) * 1984-01-10 1985-11-07 Trebe-Elektronik Dipl.-Ing. Joannis Troussas & Wolfgang Ebersberger GBR, 6336 Solms Autofocus circuit for slide projectors
JPS60145764A (en) * 1984-01-10 1985-08-01 Dainippon Screen Mfg Co Ltd Method of picture scanning and recording

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3517992A (en) * 1968-04-24 1970-06-30 Leitz Ernst Gmbh Automatic focusing slide projector
DE2225972A1 (en) * 1972-05-27 1973-12-13 Agfa Gevaert Ag AUTOMATIC FOCUSING DEVICE

Also Published As

Publication number Publication date
GB2101303A (en) 1983-01-12
FR2506469B1 (en) 1985-06-07
DE3120816A1 (en) 1982-12-23
FR2506469A1 (en) 1982-11-26

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee