FR1602663A - I r filter material comprising an indanthrene blue-dyed - Google Patents

I r filter material comprising an indanthrene blue-dyed

Info

Publication number
FR1602663A
FR1602663A FR1602663DA FR1602663A FR 1602663 A FR1602663 A FR 1602663A FR 1602663D A FR1602663D A FR 1602663DA FR 1602663 A FR1602663 A FR 1602663A
Authority
FR
France
Prior art keywords
filter material
dyed
indanthrene blue
na2s2o4
water
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)
French (fr)
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 FR1602663A publication Critical patent/FR1602663A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/22—Absorbing filters
    • G02B5/223—Absorbing filters containing organic substances, e.g. dyes, inks or pigments

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Coloring (AREA)
FR1602663D 1967-07-13 1968-07-11 I r filter material comprising an indanthrene blue-dyed Expired FR1602663A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEE0034369 1967-07-13

Publications (1)

Publication Number Publication Date
FR1602663A true FR1602663A (en) 1971-01-11

Family

ID=7076732

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1602663D Expired FR1602663A (en) 1967-07-13 1968-07-11 I r filter material comprising an indanthrene blue-dyed

Country Status (2)

Country Link
FR (1) FR1602663A (nl)
NL (1) NL152986B (nl)

Also Published As

Publication number Publication date
NL152986B (nl) 1977-04-15
NL6809988A (nl) 1969-01-15
DE1720097B1 (de) 1972-01-13

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Legal Events

Date Code Title Description
CD Change of name or company name
ST Notification of lapse