DE731831C - Lighting device for projector - Google Patents
Lighting device for projectorInfo
- Publication number
- DE731831C DE731831C DEL102200D DEL0102200D DE731831C DE 731831 C DE731831 C DE 731831C DE L102200 D DEL102200 D DE L102200D DE L0102200 D DEL0102200 D DE L0102200D DE 731831 C DE731831 C DE 731831C
- Authority
- DE
- Germany
- Prior art keywords
- mirror
- shadow
- lighting device
- piston
- bulb
- 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
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/202—Incandescent light sources
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Arrangements Of Lighting Devices For Vehicle Interiors, Mounting And Supporting Thereof, Circuits Therefore (AREA)
Description
Beleuchtungseinrichtung für Bildwerfer ' Zus<<tz zum Patent 717455 Gegenstand des Patents 717455 ist eine Beleuchtungsvorrichtung für Bildwerfer mit einem Rückspiegel und einem zwischen Lichtquelle und Bildfenster angeordneten Spiegelsystem, dessen einer Teil im Schatten der Lichtquelle steht und Licht von dem seitlich j angeordneten anderen Teil des Spiegelsystems erhält, bei der bei Verwendung einer Glühlampe als Lichtquelle die seitlichen Spiegel als Hohlspiegelstreifen ausgebildet und außerhalb des vom Rückspiegel ausgehenden Strahlenkegels so angeordnet sind, da.ß sie nur von der Lichtquelle unmittelbar ausgehende Strahlen aufnehmen.Illumination device for projectors' addition to the patent 717455 The subject of patent 717455 is a lighting device for projectors with a rearview mirror and one arranged between the light source and the picture window Mirror system, part of which is in the shadow of the light source and light from the other part of the mirror system arranged laterally j, in which at Using an incandescent lamp as a light source, the side mirrors as concave mirror strips formed and arranged outside of the beam cone emanating from the rearview mirror that they only absorb rays emanating directly from the light source.
Nach der Erfindung wird die Beleuchtungseinrichtung nach dem Hauptpatent dahin geändert, daß im Lichtquellenschatten nur ein Spiegel von der Breite des Kolbenschattens und seitlich hiervon außerhalb des vom Rückspiegel ausgehenden Strahlenkegels nur ein so ausgebildeter Hohlspiegelstreifen angeordnet ist, daß das von ihm aufgenommene Strahlenbündel nach Reflexion den im Kolbenschatten stehenden Spiegel voll ausfüllt. Hierdurch wird im Vergleich mit der Einrichtung nach dem Hauptpatent, bei der die 'Spiegel paarweise symmetrisch zur optischen Achse angeordnet sind, der Vorteil erreicht, daß nur ein Spiegelstreifen anzufertigen und beim Zusammenbau nur ein Spiegelpaar zwischen Lichtquelle und Bildfenster ztt justieren ist.According to the invention, the lighting device according to the main patent changed so that in the shadow of the light source only a mirror the width of the shadow of the bulb and to the side of this outside of the cone of rays emanating from the rearview mirror only a concave mirror strip designed in such a way is arranged that the one received by it After reflection, the bundle of rays completely fills the mirror in the shadow of the bulb. This is in comparison with the device according to the main patent, in which the 'Mirrors are arranged in pairs symmetrically to the optical axis, the advantage achieved that only one mirror strip to be made and only one when assembling The pair of mirrors between the light source and the picture window is ztt adjust.
In der Zeichnung ist die Erfindung in einem Ausführungsbeispiel, und zwar in einem waagerechten Schnitt, dargestellt.In the drawing, the invention is in one embodiment, and although shown in a horizontal section.
Mittels des Hohlspiegels t werden"die Wendel 2 der Glühlampe 3 in das Filmfenster abgebildet. Seitlich des Strahlenkegels 5 ist ein Hohlspiegelstreifen 6 angeordnet, der zusammen mit dem im Kolbenschatten liegenden Planspiegel; ein unmittelbar von der Glühlampe ausgehendes Strahlenbündel in das Filmfenster lenkt, wodurch der Kolbenschatten der Glühlampe aufgehellt wird.By means of the concave mirror t, the filament 2 of the incandescent lamp 3 in pictured the movie window. To the side of the cone of rays 5 is a concave mirror strip 6 arranged, together with the plane mirror lying in the piston shadow; a directs the beam of rays emanating directly from the incandescent lamp into the film window, whereby the bulb shadow of the light bulb is brightened.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEL102200D DE731831C (en) | 1940-10-29 | 1940-10-29 | Lighting device for projector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEL102200D DE731831C (en) | 1940-10-29 | 1940-10-29 | Lighting device for projector |
Publications (1)
Publication Number | Publication Date |
---|---|
DE731831C true DE731831C (en) | 1943-02-15 |
Family
ID=7289717
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEL102200D Expired DE731831C (en) | 1940-10-29 | 1940-10-29 | Lighting device for projector |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE731831C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3229579A (en) * | 1961-12-27 | 1966-01-18 | Aerojet General Co | Solar energy collector |
DE2461918A1 (en) * | 1974-01-11 | 1975-07-17 | Faulhaber Fritz | Motor car spot lamp - with narrow angle beam of high intensity and gas discharge light source |
-
1940
- 1940-10-29 DE DEL102200D patent/DE731831C/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3229579A (en) * | 1961-12-27 | 1966-01-18 | Aerojet General Co | Solar energy collector |
DE2461918A1 (en) * | 1974-01-11 | 1975-07-17 | Faulhaber Fritz | Motor car spot lamp - with narrow angle beam of high intensity and gas discharge light source |
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