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FR722320A - Method and apparatus for determining the position of any light sources at night - Google Patents

Method and apparatus for determining the position of any light sources at night

Info

Publication number
FR722320A
FR722320A FR722320DA FR722320A FR 722320 A FR722320 A FR 722320A FR 722320D A FR722320D A FR 722320DA FR 722320 A FR722320 A FR 722320A
Authority
FR
France
Prior art keywords
night
determining
light sources
sources
light
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
Jean Olleon
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 FR722320A publication Critical patent/FR722320A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/14—Viewfinders

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR722320D 1930-11-26 1930-11-26 Method and apparatus for determining the position of any light sources at night Expired FR722320A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR722320T 1930-11-26

Publications (1)

Publication Number Publication Date
FR722320A true FR722320A (en) 1932-03-15

Family

ID=9100899

Family Applications (1)

Application Number Title Priority Date Filing Date
FR722320D Expired FR722320A (en) 1930-11-26 1930-11-26 Method and apparatus for determining the position of any light sources at night

Country Status (1)

Country Link
FR (1) FR722320A (en)

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