DE386071C - Lens spotlights - Google Patents

Lens spotlights

Info

Publication number
DE386071C
DE386071C DESCH66511D DESC066511D DE386071C DE 386071 C DE386071 C DE 386071C DE SCH66511 D DESCH66511 D DE SCH66511D DE SC066511 D DESC066511 D DE SC066511D DE 386071 C DE386071 C DE 386071C
Authority
DE
Germany
Prior art keywords
lens
objective
focal length
spotlights
negative lens
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
DESCH66511D
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.)
Schwabe & Co
Original Assignee
Schwabe & Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Schwabe & Co filed Critical Schwabe & Co
Priority to DESCH66511D priority Critical patent/DE386071C/en
Application granted granted Critical
Publication of DE386071C publication Critical patent/DE386071C/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/02—Controlling the distribution of the light emitted by adjustment of elements by movement of light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/40—Lighting for industrial, commercial, recreational or military use
    • F21W2131/406—Lighting for industrial, commercial, recreational or military use for theatres, stages or film studios

Description

Linsenscheinwerfer. Gegenstand der Erfindung ist ein Scheinwerfer, welcher ebenso wie Ader im Hauptpatent beschriebene trotz langer Brennweite seines Objektivs nur ein kurzes Gehäuse und dementsprechend eine leichte Beweglichkeit hat und sich von dem Scheinwerfer nach dem Hauptpatent durch ein wesentlich geringeres Volumen des Gehäuses und eine einfachere Bauart unterscheidet, so daß er besonders geeignet ist, einzelne sich auf der Bühne bewegende Personen zu beleuchten. Diese Eigenschaft wird erfindungsgemäß dadurch erreicht, daß zwischen dem Kondensor und dem gleichachsigen Objektiv eine Negativlinse angeordnet ist, deren Brennweite kleiner ist als die des Objektivs und deren Entfernung von dem Ob- jektiv größer ist als die Differenz ihrer Brennweiten. Diese Anordnung ist bereits bei feststehenden Projektionsapparaten bekannt.Lens spotlights. The subject of the invention is a headlight, which, like Ader described in the main patent, has only a short housing despite the long focal length of its lens and is accordingly easy to move and differs from the headlight according to the main patent by a much smaller housing volume and a simpler design, so that it is particularly suitable for illuminating individual people moving on the stage. This property is inventively achieved in that a negative lens is arranged between the condenser and the equiaxed lens whose focal length is smaller than that of the lens and its distance from the lens is greater than the difference in their focal lengths. This arrangement is already known in fixed projection apparatus.

Die Zeichnung zeigt schematisch Ausführungsformen des Erfindungsgedankens in senkrechtem Längsschnitt durch die optische Achse. In Abb. i ist a das Gehäuse, weiches oben und unten mit Entlüftungsvorrichtungen versehen ist, b eine Glühlampe mit der Leuchtfläche d. Die Fassung der Glühlampe ist in der Höhe verschiebbar, um die leuchtende Fläche in die optische Achse einzu.stel#len. In der Wand des Gehäuses ist der zweckmäßig aus drei Linsen f, bis f2, bestehende Kondensor befestigt, in oder nahe welchem eine Blende g angebracht werden kann. An dem Gehäuse a ist seitlich das Rohr r angesetzt, an dessen anderem Ende sich die Negativlinse m und das Objektiv o befinden. Das Rohr r ist wesentlich kürzer, als für ein Objektiv der üblichen Bauart erforderlich wäre,welches dieselbe äquivalente Brennweite hat als das aus derNegativlinse n und dem Objektiv o bestehende System.The drawing shows schematically embodiments of the inventive concept in a vertical longitudinal section through the optical axis. In Fig. I, a is the housing, which is provided with ventilation devices at the top and bottom, b an incandescent lamp with the luminous surface d. The height of the bulb holder can be adjusted in order to adjust the luminous surface in the optical axis. The condenser, which expediently consists of three lenses f 1 to f 2, is fastened in the wall of the housing, in or near which a diaphragm g can be attached. The tube r is attached to the side of the housing a, at the other end of which the negative lens m and the objective o are located. The tube r is considerably shorter than would be required for an objective of the usual type, which has the same equivalent focal length as the system consisting of the negative lens n and the objective o.

Will man einen Scheinwerfer mit einer so großen äquivalenten Brinnweite anwenden, daß trotz der durch die Negativlinse n bedingten Verkürzung das Rohr r infolge seiner Länge unhandlich würde, so kann man die Anordnung der vorliegenden Erfindung mit der nach dem Hauptpatent in der Art vereinigen, wie es Abb. 2 zeigt. s, und s, sind zwei Spiegel, welche das aus der Kondensorlinse fz, tretende Lichtbündel zweimal zurückwerfen und dem aus der Negativlinse n und der Positivlinse o bestehenden optischen System zuführen.If you want to use a headlight with such a large equivalent focal length that, despite the shortening caused by the negative lens n, the tube r would become unwieldy due to its length, the arrangement of the present invention can be combined with that according to the main patent in the manner as it does Fig. 2 shows. s, and s, are two mirrors which reflect the light beam emerging from the condenser lens fz, twice and feed it to the optical system consisting of the negative lens n and the positive lens o.

Claims (1)

PATENT-ANspRucH: Linsenscheinwerfer für Bühnenzwecke mit langer Brennweite nach Patent 384477, gekennzeichnet durch die Anordnung einer Negativlinse zwischen dem Kondensor und dem Objektiv, deren Brennweite kleiner ist als die des Objektivs, und deren Entfernung vom Objektiv größer ist als die Differenz ihrer Brennweiten. PATENT CLAIM: Lens spotlights for stage purposes with long focal length according to patent 384477, characterized by the arrangement of a negative lens between the condenser and the objective, the focal length of which is smaller than that of the objective and whose distance from the objective is greater than the difference between their focal lengths.
DESCH66511D 1922-12-01 1922-12-01 Lens spotlights Expired DE386071C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DESCH66511D DE386071C (en) 1922-12-01 1922-12-01 Lens spotlights

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DESCH66511D DE386071C (en) 1922-12-01 1922-12-01 Lens spotlights

Publications (1)

Publication Number Publication Date
DE386071C true DE386071C (en) 1923-12-14

Family

ID=7438878

Family Applications (1)

Application Number Title Priority Date Filing Date
DESCH66511D Expired DE386071C (en) 1922-12-01 1922-12-01 Lens spotlights

Country Status (1)

Country Link
DE (1) DE386071C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1610055A1 (en) 2004-06-23 2005-12-28 Dedo Weigert Film GmbH Focusable projector with asymmetrical light distribution

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1610055A1 (en) 2004-06-23 2005-12-28 Dedo Weigert Film GmbH Focusable projector with asymmetrical light distribution
US7347588B2 (en) 2004-06-23 2008-03-25 Dedo Weigert Film Gmbh Focusable spotlight with asymmetrical light distribution

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