FR49880E - screen illuminating under the influence of rays - Google Patents

screen illuminating under the influence of rays

Info

Publication number
FR49880E
FR49880E FR49880DA FR49880E FR 49880 E FR49880 E FR 49880E FR 49880D A FR49880D A FR 49880DA FR 49880 E FR49880 E FR 49880E
Authority
FR
France
Prior art keywords
rays
influence
screen illuminating
illuminating under
under
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.)
Siemens Reiniger Werke AG
Original Assignee
Siemens Reiniger Werke 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 Siemens Reiniger Werke AG filed Critical Siemens Reiniger Werke AG
Application granted granted Critical
Publication of FR49880E publication Critical patent/FR49880E/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
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR49880D 1938-10-13 1938-10-13 screen illuminating under the influence of rays Expired FR49880E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR49880T 1938-10-13

Publications (1)

Publication Number Publication Date
FR49880E true FR49880E (en) 1939-08-22

Family

ID=8684974

Family Applications (1)

Application Number Title Priority Date Filing Date
FR49880D Expired FR49880E (en) 1938-10-13 1938-10-13 screen illuminating under the influence of rays

Country Status (1)

Country Link
FR (1) FR49880E (en)

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