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FR891829A - Optical assembly for magnification of the reading of dial devices - Google Patents

Optical assembly for magnification of the reading of dial devices

Info

Publication number
FR891829A
FR891829A FR891829DA FR891829A FR 891829 A FR891829 A FR 891829A FR 891829D A FR891829D A FR 891829DA FR 891829 A FR891829 A FR 891829A
Authority
FR
France
Prior art keywords
magnification
reading
optical assembly
dial devices
dial
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 Thomas
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 FR891829A publication Critical patent/FR891829A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B25/00—Eyepieces; Magnifying glasses
    • G02B25/02—Eyepieces; Magnifying glasses with means for illuminating object viewed

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR891829D 1942-11-26 1942-11-26 Optical assembly for magnification of the reading of dial devices Expired FR891829A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR891829T 1942-11-26

Publications (1)

Publication Number Publication Date
FR891829A true FR891829A (en) 1944-03-21

Family

ID=9389313

Family Applications (1)

Application Number Title Priority Date Filing Date
FR891829D Expired FR891829A (en) 1942-11-26 1942-11-26 Optical assembly for magnification of the reading of dial devices

Country Status (1)

Country Link
FR (1) FR891829A (en)

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