FR862286A - Measuring or focusing plate for optical instruments - Google Patents

Measuring or focusing plate for optical instruments

Info

Publication number
FR862286A
FR862286A FR862286DA FR862286A FR 862286 A FR862286 A FR 862286A FR 862286D A FR862286D A FR 862286DA FR 862286 A FR862286 A FR 862286A
Authority
FR
France
Prior art keywords
measuring
optical instruments
focusing plate
focusing
plate
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
Dahl Joseph
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 FR862286A publication Critical patent/FR862286A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/40—Optical focusing aids

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Transforming Electric Information Into Light Information (AREA)
FR862286D 1938-02-26 1939-02-23 Measuring or focusing plate for optical instruments Expired FR862286A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE211140X 1938-02-26

Publications (1)

Publication Number Publication Date
FR862286A true FR862286A (en) 1941-03-03

Family

ID=5801054

Family Applications (1)

Application Number Title Priority Date Filing Date
FR862286D Expired FR862286A (en) 1938-02-26 1939-02-23 Measuring or focusing plate for optical instruments

Country Status (2)

Country Link
CH (1) CH211140A (en)
FR (1) FR862286A (en)

Also Published As

Publication number Publication date
CH211140A (en) 1940-08-31

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