FR901191A - Procédé de fabrication de couches de gradation grises absorbant la lumière - Google Patents

Procédé de fabrication de couches de gradation grises absorbant la lumière

Info

Publication number
FR901191A
FR901191A FR901191DA FR901191A FR 901191 A FR901191 A FR 901191A FR 901191D A FR901191D A FR 901191DA FR 901191 A FR901191 A FR 901191A
Authority
FR
France
Prior art keywords
manufacturing process
light absorbing
gray gradation
gradation layers
absorbing gray
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
English (en)
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.)
Zeiss Ikon AG
Original Assignee
Zeiss Ikon AG
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 Zeiss Ikon AG filed Critical Zeiss Ikon AG
Application granted granted Critical
Publication of FR901191A publication Critical patent/FR901191A/fr
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
    • G01J1/14—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void using wholly visual means using comparison with a surface of graded brightness

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
FR901191D 1943-03-03 1944-01-13 Procédé de fabrication de couches de gradation grises absorbant la lumière Expired FR901191A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE901191X 1943-03-03

Publications (1)

Publication Number Publication Date
FR901191A true FR901191A (fr) 1945-07-19

Family

ID=6856592

Family Applications (1)

Application Number Title Priority Date Filing Date
FR901191D Expired FR901191A (fr) 1943-03-03 1944-01-13 Procédé de fabrication de couches de gradation grises absorbant la lumière

Country Status (1)

Country Link
FR (1) FR901191A (fr)

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