DE112255C - - Google Patents
Info
- Publication number
- DE112255C DE112255C DENDAT112255D DE112255DA DE112255C DE 112255 C DE112255 C DE 112255C DE NDAT112255 D DENDAT112255 D DE NDAT112255D DE 112255D A DE112255D A DE 112255DA DE 112255 C DE112255 C DE 112255C
- Authority
- DE
- Germany
- Prior art keywords
- light
- canvas
- screen
- effects
- rays
- 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.)
- Active
Links
- 239000000463 material Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 3
- 239000004744 fabric Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 210000000887 Face Anatomy 0.000 description 1
- 210000003128 Head Anatomy 0.000 description 1
- 241000322338 Loeseliastrum Species 0.000 description 1
- 230000002349 favourable Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000001795 light effect Effects 0.000 description 1
- 230000000051 modifying Effects 0.000 description 1
- 239000002365 multiple layer Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 210000001519 tissues Anatomy 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Printing Methods (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
PATENTSCHRIFTPATENT LETTERING
KLASSE 57: Photographie.CLASS 57: Photography.
Patentirt im Deutschen Reiche vom 29. Juli 1898 ab.Patented in the German Empire on July 29, 1898.
Beim Photographiren mittelst künstlicher Beleuchtung, namentlich bei der Blitzlichtphotographie, ist der Umstand störend, dafs bei Benutzung nur einer Lichtquelle ungünstige Licht- und Schattenwirkungen eintreten, während sich bei Anordnung mehrerer Lichtquellen die Schwierigkeit ergiebt, sä'mmtliche Lichtquellen genau gleichzeitig zu entzünden. Man hat diese Üebelstä'nde durch Benutzung nur einer Lichtquelle in Verbindung mit einem zwischen diese und das Object einzuschaltenden Lichtschirm zu vermeiden gesucht. Dabei aber ergab sich die Nothwendigkeit, aufserdem noch Reflexschirme anzuwenden. Trotzdem sind die auf diesem Wege gewonnenen Aufnahmen technisch mangelhaft. Die Gesichter erscheinen flach wie Ausschnitte auf dem Hintergrunde, den Köpfen fehlt in den Schattenpartien die Rundung, die Augen erhalten störende Reflexe und dergl.When taking pictures by means of artificial lighting, especially in flash photography, the fact that unfavorable light and shadow effects occur when using only one light source is disturbing If several light sources are arranged, the difficulty arises in all of the light sources to ignite exactly at the same time. You only have these bad conditions through use a light source in connection with one to be switched between this and the object Sought to avoid a light screen. In doing so, however, the necessity arose, moreover still use reflex umbrellas. Nevertheless, the recordings obtained in this way are technically inadequate. The faces appear flat like cutouts on the background, the heads lack the roundness in the shadow areas, the eyes get disturbing reflections and the like.
Die Ursache dieser Mangel ist darin zu suchen, dafs die bisher für Lichtschirme benutzten Stoffe, wie Seidenpapier, Leinwand, Kaliko, wegen ihrer Structur und ihrer stofflichen Eigenschaften eine zu geringe Durchlässigkeit für die Lichtstrahlen, namentlich aber für die chemisch wirkenden Strahlen besitzen, und dafs bei diesen Stoffen die Anwendung mehrerer Lagen behufs Erzielung harmonisch abgestufter Lichteffecte ausgeschlossen ist.The cause of this deficiency is to be found in the fact that they have hitherto been used for light screens Substances such as tissue paper, canvas, calico, because of their structure and their material properties Properties too low a permeability for the light rays, but in particular for the chemically acting rays, and that with these substances the application multiple layers in order to achieve harmoniously graduated light effects is excluded.
Zahlreiche Versuche haben nun ergeben, dafs von sämmtlichen transparenten Stoffen ausschliefslich Pausleinwand sä'mmlliche zweckdienlichen Eigenschaften besitzt, und dementsprechend wird bei vorliegender Erfindung Pausleinwand als Material für den Lichtschirm in Anwendung gebracht. Bei der Pausleinwand ist das weitmaschige Gewebe mit einer Masse angefüllt, die namentlich für die chemisch wirkenden Strahlen ä'ufserst durchlässig ist und infolge grofser Widerstandsfähigkeit gegen Lichtwirkungen diese Eigenschaft dauernd behält.Numerous experiments have now shown that of all transparent materials only the canvas has all the appropriate properties, and accordingly in the present invention, canvas is used as a material for the light screen. At the break screen the wide-meshed fabric is filled with a mass that is specifically for the chemically acting rays is extremely permeable and due to its great resistance to the effects of light permanently retains this property.
Man kann daher bei Anwendung von Pausleinwand nicht nur ohne Nachtheil mehrfache Stofflagen über einander für den Schirm benutzen , sondern erzielt gerade dadurch die günstigsten Beleuchtungseffecte und dementsprechend jeden Grad der Weichheit und Modulation bei der Aufnahme.Therefore, when using the canvas, one can not only do more than one without disadvantage Use layers of fabric on top of each other for the umbrella, but this is precisely how the the most favorable lighting effects and, accordingly, every degree of softness and Modulation when recording.
Claims (1)
Publications (1)
Publication Number | Publication Date |
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DE112255C true DE112255C (en) |
Family
ID=381925
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DENDAT112255D Active DE112255C (en) |
Country Status (1)
Country | Link |
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DE (1) | DE112255C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7547804B2 (en) | 2002-07-15 | 2009-06-16 | Myriad Genetics, Inc. | Compounds, compositions, and methods employing same |
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0
- DE DENDAT112255D patent/DE112255C/de active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7547804B2 (en) | 2002-07-15 | 2009-06-16 | Myriad Genetics, Inc. | Compounds, compositions, and methods employing same |
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