FR2334977A1 - Installation pour ameliorer la projection directe ou la retroprojection de films ou de diapositives - Google Patents

Installation pour ameliorer la projection directe ou la retroprojection de films ou de diapositives

Info

Publication number
FR2334977A1
FR2334977A1 FR7537831A FR7537831A FR2334977A1 FR 2334977 A1 FR2334977 A1 FR 2334977A1 FR 7537831 A FR7537831 A FR 7537831A FR 7537831 A FR7537831 A FR 7537831A FR 2334977 A1 FR2334977 A1 FR 2334977A1
Authority
FR
France
Prior art keywords
lenses
observer
screen
convex surfaces
film
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
FR7537831A
Other languages
English (en)
French (fr)
Other versions
FR2334977B1 (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.)
BELLIERE CARTONNERIE
Original Assignee
BELLIERE CARTONNERIE
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 BELLIERE CARTONNERIE filed Critical BELLIERE CARTONNERIE
Priority to FR7537831A priority Critical patent/FR2334977A1/fr
Publication of FR2334977A1 publication Critical patent/FR2334977A1/fr
Application granted granted Critical
Publication of FR2334977B1 publication Critical patent/FR2334977B1/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
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • 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
    • G03B21/001—Slide projectors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lenses (AREA)
FR7537831A 1975-12-10 1975-12-10 Installation pour ameliorer la projection directe ou la retroprojection de films ou de diapositives Granted FR2334977A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7537831A FR2334977A1 (fr) 1975-12-10 1975-12-10 Installation pour ameliorer la projection directe ou la retroprojection de films ou de diapositives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7537831A FR2334977A1 (fr) 1975-12-10 1975-12-10 Installation pour ameliorer la projection directe ou la retroprojection de films ou de diapositives

Publications (2)

Publication Number Publication Date
FR2334977A1 true FR2334977A1 (fr) 1977-07-08
FR2334977B1 FR2334977B1 (enExample) 1978-05-12

Family

ID=9163586

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7537831A Granted FR2334977A1 (fr) 1975-12-10 1975-12-10 Installation pour ameliorer la projection directe ou la retroprojection de films ou de diapositives

Country Status (1)

Country Link
FR (1) FR2334977A1 (enExample)

Also Published As

Publication number Publication date
FR2334977B1 (enExample) 1978-05-12

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Legal Events

Date Code Title Description
ST Notification of lapse