FR2224783B1 - - Google Patents

Info

Publication number
FR2224783B1
FR2224783B1 FR7412339A FR7412339A FR2224783B1 FR 2224783 B1 FR2224783 B1 FR 2224783B1 FR 7412339 A FR7412339 A FR 7412339A FR 7412339 A FR7412339 A FR 7412339A FR 2224783 B1 FR2224783 B1 FR 2224783B1
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
FR7412339A
Other languages
French (fr)
Other versions
FR2224783A1 (enExample
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.)
Ernst Leitz Wetzlar GmbH
Original Assignee
Ernst Leitz Wetzlar 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 Ernst Leitz Wetzlar GmbH filed Critical Ernst Leitz Wetzlar GmbH
Publication of FR2224783A1 publication Critical patent/FR2224783A1/fr
Application granted granted Critical
Publication of FR2224783B1 publication Critical patent/FR2224783B1/fr
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
    • G03B21/132—Overhead projectors, i.e. capable of projecting hand-writing or drawing during action

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Lenses (AREA)
FR7412339A 1973-04-09 1974-04-08 Expired FR2224783B1 (enExample)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732317830 DE2317830C3 (de) 1973-04-09 1973-04-09 Durchlicht-Schreibprojektor

Publications (2)

Publication Number Publication Date
FR2224783A1 FR2224783A1 (enExample) 1974-10-31
FR2224783B1 true FR2224783B1 (enExample) 1978-12-01

Family

ID=5877521

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7412339A Expired FR2224783B1 (enExample) 1973-04-09 1974-04-08

Country Status (2)

Country Link
DE (1) DE2317830C3 (enExample)
FR (1) FR2224783B1 (enExample)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE418423B (sv) * 1974-08-21 1981-05-25 Minnesota Mining & Mfg Kondensor, serskilt for anvendning i en arbetsprojektor
DE2840094A1 (de) * 1978-09-12 1980-03-20 Minnesota Mining & Mfg Refraktor/reflektor-strahlungskonzentrator
US4436392A (en) * 1983-01-03 1984-03-13 Minnesota Mining And Manufacturing Company Distortion correction for an overhead projector system
DE4335244B4 (de) * 1993-10-15 2006-10-19 Daimlerchrysler Ag Anordnung zur Bildaufnahme

Also Published As

Publication number Publication date
DE2317830C3 (de) 1980-06-19
DE2317830A1 (de) 1974-10-17
FR2224783A1 (enExample) 1974-10-31
DE2317830B2 (de) 1979-09-06

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Legal Events

Date Code Title Description
TP Transmission of property