FR435004A - Photographic photometer - Google Patents

Photographic photometer

Info

Publication number
FR435004A
FR435004A FR435004DA FR435004A FR 435004 A FR435004 A FR 435004A FR 435004D A FR435004D A FR 435004DA FR 435004 A FR435004 A FR 435004A
Authority
FR
France
Prior art keywords
photometer
photographic
photographic photometer
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
Albrecht Erhardt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR435004A publication Critical patent/FR435004A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/38—Photometry, e.g. photographic exposure meter using wholly visual means
    • G01J1/40—Photometry, e.g. photographic exposure meter using wholly visual means using limit or visibility or extinction effect

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
FR435004D 1910-10-30 1911-10-07 Photographic photometer Expired FR435004A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE435004X 1910-10-30

Publications (1)

Publication Number Publication Date
FR435004A true FR435004A (en) 1912-02-20

Family

ID=1476840

Family Applications (1)

Application Number Title Priority Date Filing Date
FR435004D Expired FR435004A (en) 1910-10-30 1911-10-07 Photographic photometer

Country Status (1)

Country Link
FR (1) FR435004A (en)

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