FR747649A - Optical signaling device - Google Patents

Optical signaling device

Info

Publication number
FR747649A
FR747649A FR747649DA FR747649A FR 747649 A FR747649 A FR 747649A FR 747649D A FR747649D A FR 747649DA FR 747649 A FR747649 A FR 747649A
Authority
FR
France
Prior art keywords
signaling device
optical signaling
optical
signaling
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.)
Carl Zeiss AG
Original Assignee
Carl Zeiss 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 Carl Zeiss AG filed Critical Carl Zeiss AG
Application granted granted Critical
Publication of FR747649A publication Critical patent/FR747649A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)
  • Optical Communication System (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
FR747649D 1931-12-23 1932-12-16 Optical signaling device Expired FR747649A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE409073X 1931-12-23

Publications (1)

Publication Number Publication Date
FR747649A true FR747649A (en) 1933-06-20

Family

ID=6422367

Family Applications (1)

Application Number Title Priority Date Filing Date
FR747649D Expired FR747649A (en) 1931-12-23 1932-12-16 Optical signaling device

Country Status (4)

Country Link
US (1) US1973089A (en)
FR (1) FR747649A (en)
GB (1) GB409073A (en)
NL (1) NL34521C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2466000A (en) * 1945-06-12 1949-04-05 Chester L Brown Photophone
US3290503A (en) * 1963-05-06 1966-12-06 Raytheon Co Light communication system

Also Published As

Publication number Publication date
US1973089A (en) 1934-09-11
GB409073A (en) 1934-04-26
NL34521C (en)

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