DE507265C - Lighting device for photographic reproduction - Google Patents
Lighting device for photographic reproductionInfo
- Publication number
- DE507265C DE507265C DET36537D DET0036537D DE507265C DE 507265 C DE507265 C DE 507265C DE T36537 D DET36537 D DE T36537D DE T0036537 D DET0036537 D DE T0036537D DE 507265 C DE507265 C DE 507265C
- Authority
- DE
- Germany
- Prior art keywords
- image plane
- photographic reproduction
- lighting device
- light
- recorded
- 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
Links
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
- G03B27/00—Photographic printing apparatus
- G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
- G03B27/52—Details
- G03B27/54—Lamp housings; Illuminating means
- G03B27/542—Lamp housings; Illuminating means for copying cameras, reflex exposure lighting
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Facsimile Scanning Arrangements (AREA)
Description
Gegenüber bekannten Beleuchtungsvorrichtungen vorbezeichneter Art ist der vorliegende Erfindungsgegenstand derart an der Bildebene befestigt, daß er im Halbkreis schwenkbar ist, so daß dadurch die Lichtstrahlen sowohl von vorn in der Aufsicht wie von hinten in der Durchsicht unter jedem beliebigen Winkel sowohl unmittelbar als durch Beleuchten rückstrahlender FlächenCompared to known lighting devices of the type described above is the present one Subject of the invention attached to the image plane in such a way that it can be pivoted in a semicircle, so that the light rays both from the front when viewed from above and from behind when viewed from any angle, both directly and by illuminating reflective surfaces
ίο auch mittelbar auf die aufzunehmende Vorlage gerichtet werden können.ίο also indirectly on the original to be recorded can be directed.
Durch Skaleneinteilungen kann die Ablesung der jeweiligen Stellung der Lichtschirme abgelesen und festgehalten werden.The reading of the respective position of the light screens can be made using graduations can be read and recorded.
In der zeichnerischen Darstellung bedeutet K die photographische Kammer, wobei O das Ob j ektiv darstellt. Die zwangläufige notwendige Verbindung'mit (der Bildebene B ist in der Zeichnung, weil unwesentlich, fortgelassen.In the drawing, K means the photographic chamber, where O represents the object. The inevitable necessary connection with (the image plane B is omitted in the drawing because it is insignificant.
An der Bildebene B befinden sich an den zwei oder vier Kanten halbkreisförmige Kreisabschnitte S, von deren Mittelpunkt ein verstellbarer ausziehbarer Arm A um i8o° gedreht werden kann. Der Arm kann auf dem halbkreisförmigen Abschnitt an jeder gewünschten Stelle durch eine einfache Vorrichtung festgehalten werden, wobei ein Zeiger den jeweiligen Winkelstand zur Bildebene angibt. An diesen schwenkbaren und ausziehbaren Armen A sind die Leuchtkörper L, bestehend aus Glühlampen G oder Bogenlampen, in einem Leuchtschirm L drehbar angebracht, so daß, wie die Zeichnung zeigt, jede beliebige Stellung dieser Leuchtschirme L ermöglicht wird.At the two or four edges of the image plane B there are semicircular circular segments S, from the center of which an adjustable, extendable arm A can be rotated by 180 °. The arm can be held on the semicircular section at any desired point by a simple device, a pointer indicating the respective angular position to the image plane. On these pivotable and extendable arms A , the luminous bodies L, consisting of incandescent lamps G or arc lamps, are rotatably mounted in a luminous screen L so that, as the drawing shows, these luminous screens L can be positioned in any desired position.
Die Stellung I zeigt, wie das direkte Licht die Bildebene schräg von vorn trifft. In Stellung II wirft der Leuchtschirm L das Licht auf einen weißen Schirm R, so daß das Licht von diesem Schirm durch die Rückseite der Bildebene B, die in diesem Falle aus einer Glasscheibe bestehen muß, hindurchgeht. In Stellung III geht direktes Licht durch die als Bildebene B verwendete Glasscheibe, während in Stellung IV das Licht die Bildebene weder von vorn noch von rückwärts, sondern einen zwischen Objektiv und Bildebene gespannten Rückstrahler St trifft, welcher völlig gleichmäßiges indirektes Licht auf die Bildebene B abgibt. Selbstverständlich ist auch auf der anderen Seite des Objektivs genau dieselbe Stellung des Leuchtkörpers und des Rückstrahlers St durchzuführen, um auf eine gleichmäßige Beleuchtung zu kommen.Position I shows how the direct light hits the image plane at an angle from the front. In position II, the luminescent screen L throws the light onto a white screen R, so that the light from this screen passes through the back of the image plane B, which in this case must consist of a pane of glass. In position III, direct light passes through the pane of glass used as image plane B , while in position IV the light hits the image plane neither from the front nor from the back, but rather a reflector St stretched between the lens and the image plane, which emits completely uniform indirect light onto the image plane B. . Of course, exactly the same position of the luminous element and the reflector St must also be carried out on the other side of the objective in order to achieve uniform illumination.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DET36537D DE507265C (en) | Lighting device for photographic reproduction |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DET36537D DE507265C (en) | Lighting device for photographic reproduction |
Publications (1)
Publication Number | Publication Date |
---|---|
DE507265C true DE507265C (en) | 1930-10-31 |
Family
ID=7559719
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DET36537D Expired DE507265C (en) | Lighting device for photographic reproduction |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE507265C (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2519609A (en) * | 1946-09-30 | 1950-08-22 | Benjamin Sugarman | Photoengraving lamp carrier |
EP0113977A2 (en) * | 1982-12-15 | 1984-07-25 | James Railton Denner | Camera |
EP0336551A2 (en) * | 1988-02-29 | 1989-10-11 | Wilfred Bokman | Apparatus for improved image formation |
DE4125392A1 (en) * | 1990-08-02 | 1992-02-27 | Canon Kk | IMAGE INPUT DEVICE |
-
0
- DE DET36537D patent/DE507265C/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2519609A (en) * | 1946-09-30 | 1950-08-22 | Benjamin Sugarman | Photoengraving lamp carrier |
EP0113977A2 (en) * | 1982-12-15 | 1984-07-25 | James Railton Denner | Camera |
EP0113977A3 (en) * | 1982-12-15 | 1984-08-15 | James Railton Denner | Camera |
EP0336551A2 (en) * | 1988-02-29 | 1989-10-11 | Wilfred Bokman | Apparatus for improved image formation |
EP0336551A3 (en) * | 1988-02-29 | 1990-07-11 | Wilfred Bokman | Apparatus for improved image formation |
DE4125392A1 (en) * | 1990-08-02 | 1992-02-27 | Canon Kk | IMAGE INPUT DEVICE |
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