FR1272216A - Light reduction device for projection lanterns - Google Patents

Light reduction device for projection lanterns

Info

Publication number
FR1272216A
FR1272216A FR841473A FR841473A FR1272216A FR 1272216 A FR1272216 A FR 1272216A FR 841473 A FR841473 A FR 841473A FR 841473 A FR841473 A FR 841473A FR 1272216 A FR1272216 A FR 1272216A
Authority
FR
France
Prior art keywords
reduction device
light reduction
lanterns
projection
projection lanterns
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
FR841473A
Other languages
French (fr)
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.)
Voigtlander AG
Original Assignee
Voigtlander AG
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 Voigtlander AG filed Critical Voigtlander AG
Priority to FR841473A priority Critical patent/FR1272216A/en
Application granted granted Critical
Publication of FR1272216A publication Critical patent/FR1272216A/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
    • G03B21/20—Lamp housings
    • 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
    • G03B21/20—Lamp housings
    • G03B21/2053—Intensity control of illuminating light

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
FR841473A 1960-10-18 1960-10-18 Light reduction device for projection lanterns Expired FR1272216A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR841473A FR1272216A (en) 1960-10-18 1960-10-18 Light reduction device for projection lanterns

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR841473A FR1272216A (en) 1960-10-18 1960-10-18 Light reduction device for projection lanterns

Publications (1)

Publication Number Publication Date
FR1272216A true FR1272216A (en) 1961-09-22

Family

ID=8740988

Family Applications (1)

Application Number Title Priority Date Filing Date
FR841473A Expired FR1272216A (en) 1960-10-18 1960-10-18 Light reduction device for projection lanterns

Country Status (1)

Country Link
FR (1) FR1272216A (en)

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