FR860778A - Devices and objects instantly recognizable in the dark - Google Patents

Devices and objects instantly recognizable in the dark

Info

Publication number
FR860778A
FR860778A FR860778DA FR860778A FR 860778 A FR860778 A FR 860778A FR 860778D A FR860778D A FR 860778DA FR 860778 A FR860778 A FR 860778A
Authority
FR
France
Prior art keywords
dark
devices
instantly recognizable
objects
objects instantly
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)
Inventor
Benguerel
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 filed Critical
Application granted granted Critical
Publication of FR860778A publication Critical patent/FR860778A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
FR860778D 1939-10-10 1939-10-10 Devices and objects instantly recognizable in the dark Expired FR860778A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR860778T 1939-10-10

Publications (1)

Publication Number Publication Date
FR860778A true FR860778A (en) 1941-01-23

Family

ID=9335819

Family Applications (1)

Application Number Title Priority Date Filing Date
FR860778D Expired FR860778A (en) 1939-10-10 1939-10-10 Devices and objects instantly recognizable in the dark

Country Status (1)

Country Link
FR (1) FR860778A (en)

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