FR2295449A1 - Projecteur de diapositives avec dispositif de focalisation automatique - Google Patents

Projecteur de diapositives avec dispositif de focalisation automatique

Info

Publication number
FR2295449A1
FR2295449A1 FR7538748A FR7538748A FR2295449A1 FR 2295449 A1 FR2295449 A1 FR 2295449A1 FR 7538748 A FR7538748 A FR 7538748A FR 7538748 A FR7538748 A FR 7538748A FR 2295449 A1 FR2295449 A1 FR 2295449A1
Authority
FR
France
Prior art keywords
slide
objective lens
photodetectors
projector
light reflected
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.)
Granted
Application number
FR7538748A
Other languages
English (en)
French (fr)
Other versions
FR2295449B3 (ref
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 FR2295449A1 publication Critical patent/FR2295449A1/fr
Application granted granted Critical
Publication of FR2295449B3 publication Critical patent/FR2295449B3/fr
Granted 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
    • 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
    • G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
    • G03B3/10—Power-operated focusing
    • G03B3/12—Power-operated focusing adapted for remote control

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection Apparatus (AREA)
FR7538748A 1974-12-20 1975-12-17 Projecteur de diapositives avec dispositif de focalisation automatique Granted FR2295449A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE7442401 1974-12-20

Publications (2)

Publication Number Publication Date
FR2295449A1 true FR2295449A1 (fr) 1976-07-16
FR2295449B3 FR2295449B3 (ref) 1979-10-05

Family

ID=6648018

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7538748A Granted FR2295449A1 (fr) 1974-12-20 1975-12-17 Projecteur de diapositives avec dispositif de focalisation automatique

Country Status (1)

Country Link
FR (1) FR2295449A1 (ref)

Also Published As

Publication number Publication date
FR2295449B3 (ref) 1979-10-05

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Legal Events

Date Code Title Description
ST Notification of lapse