FR475318A - Heat ray absorption filter for projection devices - Google Patents

Heat ray absorption filter for projection devices

Info

Publication number
FR475318A
FR475318A FR475318DA FR475318A FR 475318 A FR475318 A FR 475318A FR 475318D A FR475318D A FR 475318DA FR 475318 A FR475318 A FR 475318A
Authority
FR
France
Prior art keywords
heat ray
ray absorption
absorption filter
projection devices
projection
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
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.)
Francaise Du Cinema M Hansen & Cie Ste
Original Assignee
Francaise Du Cinema M Hansen & Cie Ste
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 Francaise Du Cinema M Hansen & Cie Ste filed Critical Francaise Du Cinema M Hansen & Cie Ste
Application granted granted Critical
Publication of FR475318A publication Critical patent/FR475318A/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
    • G03B21/16—Cooling; Preventing overheating

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR475318D 1913-07-19 1914-07-18 Heat ray absorption filter for projection devices Expired FR475318A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE475318X 1913-07-19

Publications (1)

Publication Number Publication Date
FR475318A true FR475318A (en) 1915-05-04

Family

ID=1513223

Family Applications (1)

Application Number Title Priority Date Filing Date
FR475318D Expired FR475318A (en) 1913-07-19 1914-07-18 Heat ray absorption filter for projection devices

Country Status (1)

Country Link
FR (1) FR475318A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2464887A (en) * 1946-01-12 1949-03-22 American Optical Corp Heat absorbing screen for projectors
US2552185A (en) * 1950-06-02 1951-05-08 Eastman Kodak Co Illuminator for optical projectors
US2552184A (en) * 1950-06-02 1951-05-08 Eastman Kodak Co Illuminator for optical projectors
US2688271A (en) * 1950-03-31 1954-09-07 Gretener Edgar Illumination system for the projection of pictures

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2464887A (en) * 1946-01-12 1949-03-22 American Optical Corp Heat absorbing screen for projectors
US2688271A (en) * 1950-03-31 1954-09-07 Gretener Edgar Illumination system for the projection of pictures
US2552185A (en) * 1950-06-02 1951-05-08 Eastman Kodak Co Illuminator for optical projectors
US2552184A (en) * 1950-06-02 1951-05-08 Eastman Kodak Co Illuminator for optical projectors

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