BE355203A - - Google Patents

Info

Publication number
BE355203A
BE355203A BE355203DA BE355203A BE 355203 A BE355203 A BE 355203A BE 355203D A BE355203D A BE 355203DA BE 355203 A BE355203 A BE 355203A
Authority
BE
Belgium
Prior art keywords
observation
angle
orientation
observer
seat
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE355203A publication Critical patent/BE355203A/fr

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
    • G02B23/16—Housings; Caps; Mountings; Supports, e.g. with counterweight

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
BE355203D BE355203A (pm)

Publications (1)

Publication Number Publication Date
BE355203A true BE355203A (pm)

Family

ID=29500

Family Applications (1)

Application Number Title Priority Date Filing Date
BE355203D BE355203A (pm)

Country Status (1)

Country Link
BE (1) BE355203A (pm)

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