DE8011606U1 - FILTERS FOR PHOTOPRAPHICAL CONTRAST INFLUENCING ON REPRODUCTION EQUIPMENT - Google Patents

FILTERS FOR PHOTOPRAPHICAL CONTRAST INFLUENCING ON REPRODUCTION EQUIPMENT

Info

Publication number
DE8011606U1
DE8011606U1 DE19808011606U DE8011606U DE8011606U1 DE 8011606 U1 DE8011606 U1 DE 8011606U1 DE 19808011606 U DE19808011606 U DE 19808011606U DE 8011606 U DE8011606 U DE 8011606U DE 8011606 U1 DE8011606 U1 DE 8011606U1
Authority
DE
Germany
Prior art keywords
contrast
influencing
filters
photopraphical
reproduction equipment
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
DE19808011606U
Other languages
German (de)
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.)
MESSMACHER JUERGEN 6000 FRANKFURT DE
Original Assignee
MESSMACHER JUERGEN 6000 FRANKFURT DE
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 MESSMACHER JUERGEN 6000 FRANKFURT DE filed Critical MESSMACHER JUERGEN 6000 FRANKFURT DE
Priority to DE19808011606U priority Critical patent/DE8011606U1/en
Publication of DE8011606U1 publication Critical patent/DE8011606U1/en
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
    • G02B5/23—Photochromic filters

Description

t · f · t · f ·

Deutsche PatentamtGerman Patent Office
BDOOMdnchen 2BDOOMnchen 2 Rntragsteiieft Jitirgett ftksTfliut&fT #000/>«ηϊ/ν//·Μ>/ηJitirgett ftksTfliut & fT # 000 /> «ηϊ / ν // · Μ> / η Thema: Kontrast beeinf/ussuny an johtfopraß/sehenSubject: Contrast inf / ussuny an johtfopraß / see
filmen mi/ft///e/>tH>fa/rop'eige»schaft/ichfrfitfcrfilm mi / ft /// e /> tH> fa / rop'eige »schaft / ichfrfitfcr

(Betrifft: Beschreibung RnlageNr. Z Seitenzahl i ( Applies to: Description of Appendix no. Z Page number i

Die photographische Reproduktionstechnik kennt die Bearbeitungsproblematik der "harten Bildvorlage". Dieses Thema behandelt unerwünschte, auch "steil graduiert" genannte photographische Ursprungsbilder, die in ihren Farbton-Helligkeitswerten nach einer Grauwertskala umgesetzt, nur wenige Graustufungen zwischen schwarz und weiß aufweisen. Solche Bildvorlagen, sowohl in schwarz-weißer als auch in bunter Papierbildausführung, und in besonders hohem Maße als Diapositivbild vorkommend, bewirken ohne korrigierende reproduktionstechnische Hilfsmittel den Vorstellungen eines Betrachters zuwiderlaufende, unansehbar harte Reproduktionen.The photographic reproduction technology knows the processing problems of the "hard original image". This topic covers unwanted, Also called "steeply graduated" original photographic images, which in their hue and lightness values according to a Gray scale implemented, only a few shades of gray between exhibit black and white. Such templates, both in black and white and in colored paper versions, and in Occurring to a particularly high degree as a slide image, without corrective reproductive aids, bring about the imagination unseen hard reproductions contrary to a viewer.

Neben anderen korrigierenden Hilfsmitteln gebraucht die Reproduktionstechnik zur Begleichung des Übels häufig die kontrastmindernde grautönende Filmmaskierung, die wie folgt funktioniert: Bildvorlagenproportional wird in farbhelligkeitskonträrer Ausführung ein nur in mehr oder weniger transparenten Grautönen arbeitender Maskenfilm erstellt, welcher mit der Bildvorlage in den Belichtungsgang gebracht während des Prozesses der Reproduktionsbelichtung auf dem Wege höheren Belichtungsintensitätsbedarfs, um die Hellstfarben des Vorbildes zu erreichen, die Dunkelfarben überbelichtet und damit grauskalenmäßig flacher graduierend aufhellt.In addition to other corrective aids, reproductive technology uses to compensate for the problem often the contrast-reducing gray-tinted film masking, which works as follows: Image original is proportional in color brightness contrasting execution a mask film that works only in more or less transparent gray tones is created, which is based on the original image in the exposure cycle brought during the process of reproduction exposure on the way of higher exposure intensity requirements, in order to achieve the brightest colors of the model, overexposed the dark colors and thus flatter in terms of gray scale graduating brightens.

In vergleichbar wirkungsähnlicher Weise kann aber an Stelle des beschriebenen Verfahrens das phototrope Filter funktionieren. Sein hervorragender Vorteil gegenüber allen Verfahren besteht in der Nutzung der Eigenschaft des Filters,unter Lichtabschluß immer wieder zu regenerieren und dadurch zuzüglich nicht zu erfolgender Vor- oder Nachbehandlung, vorbild-ungebunden aufs Neue nutzbar zu sein.Instead of the method described, the photochromic filter can function in a comparable manner with a similar effect. Its outstanding advantage over all methods is the use of the property of the filter in the dark To regenerate again and again and thus plus any pre- or post-treatment that is not required, regardless of the model to be useful.

Mit diesen Eigenschaften kann das phototrope Filter bei entsprechender pbototropeigenschaftlicher und für die Aufgaben der Kontrastbeeinflussung an photographischen Filmmaterialien erfolgter Korrektur neue und wirtschaftlichere Wege sowohl für die Fachphotographie als auch für den Amateurbereich erschließen.With these properties, the photochromic filter can with appropriate pbototropic properties and for the tasks of influencing contrast on photographic film materials Correcting new and more economical ways for both Open up specialist photography as well as for the amateur sector.

Claims (1)

/Jn c/as/ Jn c / as DetittchePa/mfamtDetittchePa / mfamt BOOOMünchen ZBOOOMunich Z Ff/fcr tutphoteyretfiti/sehen ifattreistf einfassung an XqowefttJItfo/isgtraUnFf / fcr tutphoteyretfiti / see ifattreistf edging at XqowefttJItfo / isgtraUn SchutzannpruchClaim to protection : 3 Seitenzahl : 3 page number filter ?.ur photop;raphischen Fontrnstbeeinflussun^ sn ReproduktionsgeräteiA sind dadurch gekennzeichnet,daß (1) c°^undGte oder (2) kantige und im Quorsclinitt
(3) flächig dimensioniertSjinit (^) phototrop eigenschaftlichen Partikeln angereicherte (5) Gläser oder (5) Folien,oder (7) Glas-Folienverbundschichtcn als Filter im (9) Eelichtungsstrahlengang des
Reproduktionsgerätes angeordnet sind.Filters? .ur photopraphic fonts influencing units. Reproduction devices are characterized in that (1) c ° and dGte or (2) angular and horizontal lines
(3) planar dimensioned sjinite (^) phototropic particles enriched (5) glasses or (5) foils, or (7) glass-foil composite layers as a filter in the (9) exposure beam path of the
Reproduction device are arranged.
DE19808011606U 1980-04-29 1980-04-29 FILTERS FOR PHOTOPRAPHICAL CONTRAST INFLUENCING ON REPRODUCTION EQUIPMENT Expired DE8011606U1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19808011606U DE8011606U1 (en) 1980-04-29 1980-04-29 FILTERS FOR PHOTOPRAPHICAL CONTRAST INFLUENCING ON REPRODUCTION EQUIPMENT

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19808011606U DE8011606U1 (en) 1980-04-29 1980-04-29 FILTERS FOR PHOTOPRAPHICAL CONTRAST INFLUENCING ON REPRODUCTION EQUIPMENT

Publications (1)

Publication Number Publication Date
DE8011606U1 true DE8011606U1 (en) 1981-12-17

Family

ID=6715106

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19808011606U Expired DE8011606U1 (en) 1980-04-29 1980-04-29 FILTERS FOR PHOTOPRAPHICAL CONTRAST INFLUENCING ON REPRODUCTION EQUIPMENT

Country Status (1)

Country Link
DE (1) DE8011606U1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3221349A1 (en) * 1982-06-05 1983-12-08 Horst 2100 Hamburg Minners Method for constructing a contrast-reducing mask for producing high-contrast negatives or slides, and contrast-reducing mask produced according to the method
US4758502A (en) * 1984-02-29 1988-07-19 Image Master Limited Photographic contrast masking with a photochromic body

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3221349A1 (en) * 1982-06-05 1983-12-08 Horst 2100 Hamburg Minners Method for constructing a contrast-reducing mask for producing high-contrast negatives or slides, and contrast-reducing mask produced according to the method
US4758502A (en) * 1984-02-29 1988-07-19 Image Master Limited Photographic contrast masking with a photochromic body

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