LU79144A1 - DEVICE FOR OBSERVING THE INTERIOR OF A SPEAKER - Google Patents

DEVICE FOR OBSERVING THE INTERIOR OF A SPEAKER

Info

Publication number
LU79144A1
LU79144A1 LU79144A LU79144A LU79144A1 LU 79144 A1 LU79144 A1 LU 79144A1 LU 79144 A LU79144 A LU 79144A LU 79144 A LU79144 A LU 79144A LU 79144 A1 LU79144 A1 LU 79144A1
Authority
LU
Luxembourg
Prior art keywords
observing
speaker
interior
Prior art date
Application number
LU79144A
Other languages
French (fr)
Inventor
R Pirlet
Original Assignee
Centre Rech Metallurgique
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 Centre Rech Metallurgique filed Critical Centre Rech Metallurgique
Publication of LU79144A1 publication Critical patent/LU79144A1/en

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
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G02B23/2407—Optical details

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
LU79144A 1977-03-02 1978-02-28 DEVICE FOR OBSERVING THE INTERIOR OF A SPEAKER LU79144A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE852016 1977-03-02

Publications (1)

Publication Number Publication Date
LU79144A1 true LU79144A1 (en) 1978-06-27

Family

ID=3861492

Family Applications (1)

Application Number Title Priority Date Filing Date
LU79144A LU79144A1 (en) 1977-03-02 1978-02-28 DEVICE FOR OBSERVING THE INTERIOR OF A SPEAKER

Country Status (1)

Country Link
LU (1) LU79144A1 (en)

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