FR326368A - Improvements to photometers - Google Patents

Improvements to photometers

Info

Publication number
FR326368A
FR326368A FR326368DA FR326368A FR 326368 A FR326368 A FR 326368A FR 326368D A FR326368D A FR 326368DA FR 326368 A FR326368 A FR 326368A
Authority
FR
France
Prior art keywords
photometers
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
Marks Louis-Benedict
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.)
MARKS LOUIS BENEDICT
Original Assignee
MARKS LOUIS BENEDICT
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 MARKS LOUIS BENEDICT filed Critical MARKS LOUIS BENEDICT
Application granted granted Critical
Publication of FR326368A publication Critical patent/FR326368A/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
    • G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
    • G01J1/12—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void using wholly visual means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
FR326368D 1902-07-11 1902-07-11 Improvements to photometers Expired FR326368A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR326368T 1902-07-11

Publications (1)

Publication Number Publication Date
FR326368A true FR326368A (en) 1903-05-23

Family

ID=1376463

Family Applications (1)

Application Number Title Priority Date Filing Date
FR326368D Expired FR326368A (en) 1902-07-11 1902-07-11 Improvements to photometers

Country Status (1)

Country Link
FR (1) FR326368A (en)

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