DE106576C - - Google Patents
Info
- Publication number
- DE106576C DE106576C DENDAT106576D DE106576DA DE106576C DE 106576 C DE106576 C DE 106576C DE NDAT106576 D DENDAT106576 D DE NDAT106576D DE 106576D A DE106576D A DE 106576DA DE 106576 C DE106576 C DE 106576C
- Authority
- DE
- Germany
- Prior art keywords
- emulsion
- films
- photography
- light
- plates
- 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
- 239000000839 emulsion Substances 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/16—X-ray, infrared, or ultraviolet ray processes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
PATENTSCHRIFTPATENT LETTERING
KLASSE 57: Photographs.CLASS 57: Photographs.
Patentirt im Deutschen Reiche vom 27. Januar 1897 ab.Patented in the German Empire on January 27, 1897.
Vorliegende Erfindung, welche sich auf die Photographie mit Röntgenstrahlen erstreckt, besteht in der Verwendung doppelseitig mit Emulsion bedeckter photographischer Platten, Films oder dergl.The present invention, which extends to X-ray photography, consists in the use of photographic plates covered with emulsion on both sides, Films or the like.
Alle bisherigen Versuche, eine für Röntgenstrahlen besonders empfindliche Emulsion herzustellen, haben kein Ergebnifs gehabt. Die gewöhnliche, hochempfindliche photographische Platte hat sich am geeignetsten erwiesen. Dagegen hat es sich gezeigt, dafs Platten, Films, Papiere und dergl., die doppelseitig mit Emulsion versehen sind, für die Röntgenphotographie besondere Vortheile bieten. Der Grund hierfür ist darin zu suchen, dafs auf beiden Schichten annähernd gleiche Bilder hervorgerufen werden, die sich gegenseitig aufs Genaueste decken und durch ihren einheitlichen Träger dauernd in ihrer gegenseitigen Lage fixirt werden. Durch diese Deckung von Licht und Schatten zweier normaler Bilder entsteht in der Durchsicht ein Bild, das gegen jedes einzelne nicht allein an Dichte, sondern vor allem an Contrastreichthum bedeutend gewonnen hat. Zur Erzielung gleichen Contrastreichthums genügt daher eine kürzere Belichtungszeit. All previous attempts to produce an emulsion that is particularly sensitive to X-rays, have had no result. The ordinary high speed photographic plate has been found to be the most suitable. Against it it has been shown that plates, films, papers, and the like, which are double-sided with emulsion are provided, for which X-ray photography offer particular advantages. The reason for that is to be sought in the fact that approximately the same images are produced on both layers that exactly match each other and through their uniform Bearers are permanently fixed in their mutual position. Through this covering of light and the shadow of two normal images, when looking through them, an image emerges that contrasts with each other some not only in density, but above all in richness of contrast Has. A shorter exposure time is therefore sufficient to achieve the same richness in contrast.
Dieser Effect kommt bei der Photographie mit gewöhnlichem Licht nicht recht zur Geltung, weil die der Lichtquelle abgewendete Schichtseite infolge der Diffusion und Absorption des Lichtes in der vorderen Emulsionsschicht ein unklares, nur ganz schwaches Bild liefert.This effect does not really come into its own in photography with ordinary light, because the side of the layer facing away from the light source as a result of diffusion and absorption of the light in the front emulsion layer an unclear, only very faint image supplies.
Zweiseitig mit Emulsion bedeckte Platten, Films etc., welche in der englischen Patentschrift Nr. 2699/1885 zur Erzielung einer gröfseren Brillanz des Bildes empfohlen worden sind, haben in der gewöhnlichen Photographie nur geringe Verwendung gefunden, weil der davon erwartete Erfolg nicht erreicht worden ist.Plates, films, etc. covered on both sides with emulsion, which are described in the English patent specification No. 2699/1885 has been recommended to achieve a greater brilliance of the picture have found little use in ordinary photography because of the of which expected success has not been achieved.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE106576T |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE106576C true DE106576C (en) |
Family
ID=5650719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT106576D Active DE106576C (en) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE106576C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3125715A1 (en) * | 1980-07-21 | 1982-02-25 | Drexler Technology Corp., Palo Alto, Calif. | DOUBLE-SIDED PHOTOGRAPHIC SILVER HALOGENIDE MATERIAL |
| US12377499B2 (en) | 2019-08-20 | 2025-08-05 | Baosteel Lasertechnik Gmbh | Method for producing a welded T-beam or I-beam profile |
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0
- DE DENDAT106576D patent/DE106576C/de active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3125715A1 (en) * | 1980-07-21 | 1982-02-25 | Drexler Technology Corp., Palo Alto, Calif. | DOUBLE-SIDED PHOTOGRAPHIC SILVER HALOGENIDE MATERIAL |
| US12377499B2 (en) | 2019-08-20 | 2025-08-05 | Baosteel Lasertechnik Gmbh | Method for producing a welded T-beam or I-beam profile |
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