DE767467C - Method and apparatus for the isolation of ultra-red radiation - Google Patents

Method and apparatus for the isolation of ultra-red radiation

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Publication number
DE767467C
DE767467C DEJ62701D DEJ0062701D DE767467C DE 767467 C DE767467 C DE 767467C DE J62701 D DEJ62701 D DE J62701D DE J0062701 D DEJ0062701 D DE J0062701D DE 767467 C DE767467 C DE 767467C
Authority
DE
Germany
Prior art keywords
ultra
red
isolation
filters
red radiation
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
DEJ62701D
Other languages
German (de)
Inventor
Hanns Dr Rein
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.)
Cassella Farbwerke Mainkur AG
Original Assignee
Cassella Farbwerke Mainkur 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 Cassella Farbwerke Mainkur AG filed Critical Cassella Farbwerke Mainkur AG
Priority to DEJ62701D priority Critical patent/DE767467C/en
Application granted granted Critical
Publication of DE767467C publication Critical patent/DE767467C/en
Expired legal-status Critical Current

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Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03CPHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C7/00Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
    • G03C7/04Additive processes using colour screens; Materials therefor; Preparing or processing such materials
    • G03C7/06Manufacture of colour screens

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Filters (AREA)

Description

Verfahren und Vorrichtung zur Isolierung ultraroter Strahlung - Zur Isolierung ultraroter- Strahlung sind bereits die verschied-eilisten Mittel angegehein worden. Trotzdem war es bisher noch nicht möglich, mit wirklich einfachen Mitteln in wirtschaftlicher Weise ein technisch brauchbares Ultrarotfilter herzustellen, das bei genügender Durchläs#sigkeit für Ultrarot selbst bei Anwendung von den i.nte-n.s#ivsten technischen Lichtquelltin, kein sichtbares Licht mehr durchläßt.Method and device for the isolation of ultra -red radiation - The various means of isolating ultra-red radiation have already been approached. In spite of this, it has not yet been possible to economically manufacture a technically usable ultrared filter with really simple means which, with sufficient permeability for ultrared, no longer allows any visible light to pass through, even when using the most advanced technical light sources.

Für vielei Zwecke der technischen Anwendung ultraroter Strahlen, insbesondere für geheime üb,erwachun.g*s-, Kontroll- und Beob,-achtungsverfahren, ist dies jedoch eine dringende Forderung und bereitet gerade bei Verwendung intensiver Lichtquellen nicht unerhebliche Schwierigkeiten. So zeigt das bekannte Ultraxotfilter der Firma Schott RG 7 in :2 mm Dicke, das bei diffusem Tage:slicht kaum durchsichtig erscheint, in Kombination. init einer stark belasteten Glühlampe; z. B. einer goo-Watt-KinoprojeI<tionislampe, noch deutlich den Glühkörper der Lichtquelle, selbst noch, auf größere Entfernungen. Gegen die Mittagssonne gerichtet, ist der Sonnenkörper noch. deutlich, sichtbar. Auch Filter, die unter Verwendung einer oder mehrerer Kolloidschichten hergestellt werden, dieeinerseits mit deinem Farbstoff der Carbocyaninreihe" anderseit#s mit bekannten, die Strahlen von Ultraviolett bis zum klaren Rot absorbierenden Farbstoffen gefärbt sind, e#ntsprechen in keiner U'eise den Anforderungen, welche an Ultrarotfilter zur Herstellung hochintensiver Ultrarotstrahler gestellt werden, sondern genügen nur Anforderungen, welche etwa der Ultrarotphotographie genügen.For many purposes of the technical application of ultra-red rays, in particular for secret exercise, control and observation, observation processes, this is an urgent requirement and causes considerable difficulties, especially when using intensive light sources. The well-known Ultraxot filter from Schott RG 7 in: 2 mm thickness, which in a diffuse day hardly appears transparent, in combination. with a heavily loaded incandescent lamp; z. B. a goo-watt cinema projection lamp, the incandescent body of the light source is still clearly visible, even at greater distances. Directed against the midday sun, the solar body is still. clear, visible. Filters that are manufactured using one or more colloid layers, on the one hand with your dye of the carbocyanine series, on the other hand with known dyes that absorb rays from ultraviolet to clear red, do not in any way meet the requirements, which are placed on ultra-red filters for the production of high-intensity ultra-red emitters, but only meet requirements that, for example, meet those of ultra-red photography.

Es wurde nun gefunden, daß man technisch gut brauchbare, sehr beständige Filter erhält, -welche -unter obigen Bedingungen undurch#i;ich,tig sind, dabei aber eine recht gute Ultrarotdurchlässigkeit aufweisen, wenn man an und für sich gut ultrarotdurchlässige Trägersubstanzen, insbesondere Cellophan, verwendet, welche mit hochlichteebten wasserunlöslichen Farbstoffen, insbesondere Küpenfarbstoffen, die schwermetallfrei sind, gefärbt werden. Letztere Bedingung ist wesentlich, da schwermetallhaltige Farbstoffe in dem fraglichen Bereich Licht absorbieren.It has now been found that technically useful, very stable Filter receives -which -under the above conditions are impenetrable # i; i, tig, but at the same time Have a reasonably good ultra-red transmission if you are good in and of itself ultraredransparent carrier substances, in particular cellophane, used which with highly light, water-insoluble dyes, especially vat dyes, that are free of heavy metals, are colored. The latter condition is essential there Heavy metal-containing dyes in the area in question absorb light.

Die Filter können aus einer oder mehreren Schichten bzw. Folien bestehen. Sie, können, falls mehrere Folien verwendet werden, zur Vermeidung von Reflexionsverlusten mit entsprechenden Bindemitteln verkittet sein. Zum Schutz geggen äußere Einflüsse können. sie mit Schutzlacküberzüggen versehen werden. Sie können weiterhin in Kombination mit bisher bekannten Filtern, z. B. dem obengenannten Schott-Ultrarotfilter RG 7 verwendet werden. B e i s p i e 1 je eine Cellophanfolie wird mit Indanthrenschwarz BGA (S c li u 1 t Z, Farbstofftabellen. 7. Aufl. Nr. 126,9) und Indanthrenschar-lach R (Ergänzungsband S. io7) - gefärbt. Die Kombination der beiden Folien ergibt ein Ultrarotfilter von guter Durchlässigkeit für Ultrarot, ist aber praktisch undurchsichtig. Währelnd das genannte Schott-Ultrarotfilter RG 7 bei Verwendung einer c)oo-Watt-Projeltiolislampe noch deutlich den Glühkörper selb(st in größerer Entfernung erkennen läßt, ist dieser bei Venvendung der vorstehend genannten Filterkombination selbst bei dunkeladaptiertem Auze unsichtbar. Dabei erLibt sieh etwa fol- -ende Durchlässigkeit: Skalen- Gesamtstrahlung der goo-Watt-Lampe teile thermoelektrisch ............... ioo Strahlung hinter dem Schott-Filter RG 7 2 MM (Glühkörper sichtbar) . So Strahlung hinter obiger Filterkombi- nation (Glühkörper unsichtbar) ... 6o Wenn Man berücksichtigt, daß die beanspruchten Filter in technisch beliebigerl Aus-Maßen hergestellt werden können, so ist die außerordentlich wirtschaftliche und technische Bedeutung unverkennbar.The filters can consist of one or more layers or foils. If several foils are used, they can be cemented with appropriate binders to avoid reflection losses. To protect against external influences. they are provided with protective lacquer coatings. You can continue to use in combination with previously known filters such. B. the above-mentioned Schott ultra-red filter RG 7 can be used. B ice p y 1 each is a cellophane film with Indanthrenschwarz BGA (S c li u 1 t Z, dye tables 7th ed No. 126.9...) And laughing Indanthrenschar-R (Suppl S. IO7) - colored. The combination of the two films results in an ultra-red filter with good permeability for ultra-red, but is practically opaque. While the above-mentioned Schott RG 7 ultra-red filter, when using a c) oo-watt projection lamp, clearly shows the incandescent body itself (st at a greater distance, this is invisible even with a dark-adapted lens when using the above-mentioned filter combination - -end permeability: scale- Total radiation of the goo-watt lamp parts thermoelectric ............... ioo Radiation behind the Schott filter RG 7 2 MM (incandescent body visible) . So Radiation behind the above filter combination nation (incandescent body invisible) ... 6o If one takes into account that the filters claimed can be produced in any technical size, the extremely economic and technical importance is unmistakable.

Claims (2)

PATENTANSPRCCHE: i. Verfahren zur Herstellung von Ultrarot-Filtern, dadurch gekennzeichnet, daß man ultrarotdurchlässige Trägerfolien oder -schichten verwendet, welche mit hochlichtechtün sch"vermetallfreien wasserunlöslichen organischen Farbstoffen, insbesondere, Küpenfarbstoffen. gefärbt wurden. CLAIMS: i. Process for the manufacture of ultra-red filters, characterized in that there are ultra-red transparent carrier films or layers used, which are made with highly light-resistant, non-metallic, water-insoluble organic Dyes, in particular vat dyes. were colored. 2. Vorrichtung zur Isolierung ultraroter Strahlung, dadurch gekennzeichnet, daß sie nach dem Verfahren des Anspruchs i hergestellte Filter trägt. Zur Al#grenzung des Erfindungsgegenstands vorn Stand der Technik sind im Erteilungsverfahren folg-Inde Druckschriften in Betracht gezogen worden: Helwieh, »Die Infrarotpliotographie«, Halle 1034, S. 26-. deutsche Patentschriften -Nr. (>-1-t 925, 6,;4 goo, französische Patentschriften -Nr. 79-1.453.2. Device for the isolation of ultra-red radiation, characterized in that it carries filters manufactured according to the method of claim i. To delimit the subject matter of the invention from the state of the art, follow-in publications have been taken into account in the granting procedure: Helwieh, "Die Infraredpliotographie", Hall 1034, p. 26-. German patent specification no. (> -1-t 925, 6,; 4 goo, French patents -No.79-1.453.
DEJ62701D 1938-10-25 1938-10-25 Method and apparatus for the isolation of ultra-red radiation Expired DE767467C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEJ62701D DE767467C (en) 1938-10-25 1938-10-25 Method and apparatus for the isolation of ultra-red radiation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEJ62701D DE767467C (en) 1938-10-25 1938-10-25 Method and apparatus for the isolation of ultra-red radiation

Publications (1)

Publication Number Publication Date
DE767467C true DE767467C (en) 1952-09-08

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1204939B (en) * 1964-03-07 1965-11-11 Eltro G M B H & Co Ges Fuer St Method and device for the production of spectral filters in curved, preferably spherically curved, form

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR794453A (en) * 1934-09-04 1936-02-18 Ig Farbenindustrie Ag infrared permeable photographic screen
DE644925C (en) * 1935-06-08 1937-05-18 I G Farbenindustrie Akt Ges Process for the production of synthetic fibers containing nitrogen and sulfur from cellulose xanthogenate solutions
DE654900C (en) * 1933-11-04 1938-01-04 I G Farbenindustrie Akt Ges Ultraviolet absorbing light filter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE654900C (en) * 1933-11-04 1938-01-04 I G Farbenindustrie Akt Ges Ultraviolet absorbing light filter
FR794453A (en) * 1934-09-04 1936-02-18 Ig Farbenindustrie Ag infrared permeable photographic screen
DE644925C (en) * 1935-06-08 1937-05-18 I G Farbenindustrie Akt Ges Process for the production of synthetic fibers containing nitrogen and sulfur from cellulose xanthogenate solutions

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1204939B (en) * 1964-03-07 1965-11-11 Eltro G M B H & Co Ges Fuer St Method and device for the production of spectral filters in curved, preferably spherically curved, form

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