CH506801A - Device for autofocusing a slide projection lantern - Google Patents

Device for autofocusing a slide projection lantern

Info

Publication number
CH506801A
CH506801A CH1250969A CH1250969A CH506801A CH 506801 A CH506801 A CH 506801A CH 1250969 A CH1250969 A CH 1250969A CH 1250969 A CH1250969 A CH 1250969A CH 506801 A CH506801 A CH 506801A
Authority
CH
Switzerland
Prior art keywords
autofocusing
slide projection
projection lantern
lantern
slide
Prior art date
Application number
CH1250969A
Other languages
French (fr)
Inventor
Besancenot Serge
Original Assignee
Besancenot Serge
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
Priority claimed from FR6903970A external-priority patent/FR2034178A6/fr
Priority claimed from FR6911009A external-priority patent/FR2042288A6/fr
Application filed by Besancenot Serge filed Critical Besancenot Serge
Publication of CH506801A publication Critical patent/CH506801A/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/40—Optical focusing aids
    • 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)
  • Optics & Photonics (AREA)
  • Projection Apparatus (AREA)
  • Microscoopes, Condenser (AREA)
CH1250969A 1968-09-27 1969-08-13 Device for autofocusing a slide projection lantern CH506801A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR167791 1968-09-27
FR6903970A FR2034178A6 (en) 1969-02-13 1969-02-13
FR6911009A FR2042288A6 (en) 1969-04-10 1969-04-10

Publications (1)

Publication Number Publication Date
CH506801A true CH506801A (en) 1971-04-30

Family

ID=27244891

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1250969A CH506801A (en) 1968-09-27 1969-08-13 Device for autofocusing a slide projection lantern

Country Status (6)

Country Link
BE (1) BE736454A (en)
CA (1) CA929641A (en)
CH (1) CH506801A (en)
DE (1) DE1947337C3 (en)
ES (1) ES370160A1 (en)
NL (1) NL6913622A (en)

Also Published As

Publication number Publication date
DE1947337C3 (en) 1974-03-14
DE1947337B2 (en) 1973-08-16
BE736454A (en) 1969-12-31
DE1947337A1 (en) 1970-04-16
NL6913622A (en) 1970-04-01
CA929641A (en) 1973-07-03
ES370160A1 (en) 1971-04-01

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Legal Events

Date Code Title Description
PL Patent ceased