DE402810C - Device for showing photos in transmitted light - Google Patents

Device for showing photos in transmitted light

Info

Publication number
DE402810C
DE402810C DEB103115D DEB0103115D DE402810C DE 402810 C DE402810 C DE 402810C DE B103115 D DEB103115 D DE B103115D DE B0103115 D DEB0103115 D DE B0103115D DE 402810 C DE402810 C DE 402810C
Authority
DE
Germany
Prior art keywords
transmitted light
screen
chamber
light
chambers
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
DEB103115D
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.)
Individual
Original Assignee
Individual
Publication date
Priority to DEB103115D priority Critical patent/DE402810C/en
Application granted granted Critical
Publication of DE402810C publication Critical patent/DE402810C/en
Expired legal-status Critical Current

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
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • 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
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/10—Projectors with built-in or built-on screen
    • 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
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G03B21/62—Translucent screens

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection Apparatus (AREA)

Description

Die Erfindung betrifft eine Einrichtung zum Vorführen von Lichtbildern im Durchlicht bei Tage oder in künstlich erleuchteten Vorführungsräumen.The invention relates to a device for presenting photographs in transmitted light during the day or in artificially lit presentation rooms.

Es ist «bekannt, bei Einrichtungen dieser Art vor dem von hinten belichteten Bildschirm eine nach vorn offene dunkle Kammer vorzusehen, um schädliches Licht abzuhalten. Ferner ist es nicht mehr neu, in der Kammer zwischen Lichtquelle und Bildschirm drehbare Spiegel anzuordnen, um die gegen die Kammerwand fallenden Lichtstrahlen in verschiedenen Winkeln gegen die Schirmfläche zurückzuwerfen. It is “known, in devices of this type, in front of the backlit screen Provide a dark chamber open to the front to keep out harmful light. Furthermore, it is no longer new to be able to rotate in the chamber between the light source and the screen To arrange mirrors to the light rays falling against the chamber wall in different Throw back angles against the screen surface.

Demgegenüber sind bei der Einrichtung nach der Erfindung in dem vor dem Schirm zwischen diesem und den Beschauern befindlichen kammerartigen Ansätze im Innern in geeigneten Abständen hintereinander Blenden mit nach außen zunehmenden lichten öffnungen angeordnet, die jede Rückstrahlung des durch den Schirm hindurchgehenden oder von vorn einfallenden Lichtes ,in die Kammer verhindern sollen. Ferner sind derartige Blenden auch in der zwischen Lichtquelle und Bildschirm befindlichen Kammer vorgesehen, die aber im Gegensatz zu den erwähnten Spiegeln die Aufgabe haben, das von der beleuchteten Schirmfläche zurückfallende Licht unschädlich zu machen.In contrast, are in the device according to the invention in front of the screen between this and the spectators located chamber-like approaches in the interior in suitable spacing one behind the other with diaphragms with clear openings that increase towards the outside arranged that any reflection of the light passing through the screen or incident from the front into the chamber should prevent. Furthermore, such diaphragms are also located between the light source and Screen located chamber provided, but in contrast to those mentioned The task of mirrors is to reflect the light returning from the illuminated screen surface to render harmless.

Die Abb. 1 zeigt eine beispielsweise Ausführungsform. An den Raum a, in dem sich der Bildwerfer befindet, schließt sich eine Kammer b an, die nach den Beschauern zu · durch den Bildschirm e abgeschlossen -ist. Vor dem letzteren befindet sich die Kammer c, die entsprechend der Abbildung einen bühnenähnlichen Anbau haben kann.Fig. 1 shows an exemplary embodiment. A chamber b adjoins the room a, in which the projector is located, which, according to the spectators , is closed off by the screen e . In front of the latter is the chamber c, which can have a stage-like extension as shown in the illustration.

Die Wände beider Kammern sind schwarz oder mit einer anderen dunklen Farbe angestrichen. Die Innenwände der Kammern b und c sind mit Blenden h versehen, deren nach vorn zunehmender lichter Durchmesser dem Verlauf der die Abbildung bewirkenden Lichtstrahlen angepaßt ist. Hierdurch wird 4-5 die Güte und Sichtbarkeit der Lichtbilder, insbesondere beim Bildwurf in erleuchteten Räumen oder am Tage, wesentlich erhöht,The walls of both chambers are painted black or some other dark color. The inner walls of the chambers b and c are provided with diaphragms h whose clear diameter, which increases towards the front, is adapted to the course of the light rays causing the image. This significantly increases the quality and visibility of the photos, especially when throwing images in lighted rooms or during the day,

Claims (1)

Patent-Anspruch: 5<>Patent claim: 5 <> Einrichtung zum Vorführen von Lichtbildern· im Durchlicht, bei der zwischen dem Bildwerfer und dem Bildschirm sowie zwischen letzterem und den Beschauern dunkle Kammern vorgesehen sind, gekennzeichnet durch in den Kammern vorgesehene, in geeigneten Abständen hintereinanderliegende Blenden (A) mit nach außen hin zunehmenden lichten Öffnungen, die dem Verlauf der die Abbildung bewirkenden Lichtstrahlen angepaßt sind.Device for presenting photographs · in transmitted light, in which between the projector and the screen as well as between the latter and the spectators dark chambers are provided, characterized by those provided in the chambers, Panels (A) arranged one behind the other at suitable intervals with clear openings that increase towards the outside, which are adapted to the course of the light rays causing the image.
DEB103115D Device for showing photos in transmitted light Expired DE402810C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB103115D DE402810C (en) Device for showing photos in transmitted light

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB103115D DE402810C (en) Device for showing photos in transmitted light

Publications (1)

Publication Number Publication Date
DE402810C true DE402810C (en) 1924-09-22

Family

ID=6990638

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB103115D Expired DE402810C (en) Device for showing photos in transmitted light

Country Status (1)

Country Link
DE (1) DE402810C (en)

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