DE1154290B - Honeycomb condenser system for film projectors - Google Patents
Honeycomb condenser system for film projectorsInfo
- Publication number
- DE1154290B DE1154290B DEV10620A DEV0010620A DE1154290B DE 1154290 B DE1154290 B DE 1154290B DE V10620 A DEV10620 A DE V10620A DE V0010620 A DEV0010620 A DE V0010620A DE 1154290 B DE1154290 B DE 1154290B
- Authority
- DE
- Germany
- Prior art keywords
- honeycomb
- lens
- center
- light source
- raster
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/02—Simple or compound lenses with non-spherical faces
- G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
- G02B19/0009—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only
- G02B19/0014—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only at least one surface having optical power
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
- G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
-
- 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
- G03B21/208—Homogenising, shaping of the illumination light
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Projection Apparatus (AREA)
- Lenses (AREA)
Description
Wabenkondensorsystem für Filmprojektoren Die Erfindung betrifft ein Wabenkondensorsystem für Filmprojektoren mit sphärischen optischen Gliedern zur Abbildung einer Lichtquelle in das Bildfenster und zwei in dem Abbildungsstrahlengang angeordneten, je aus einer Vielzahl von Elementarlinsen bestehenden Linsenrastern, von deren vorderem (dem Bildfeldlinsenraster) jede einzelne Linse die Lichtquelle auf eine entsprechende Linse des hinteren (des Leuchtfeldlinsenrasters) abbildet, während diese Linse die entsprechende Linse des Bildfeldlinsenrasters in das ganze Bildfenster abbildet.Honeycomb Condenser System for Film Projectors The invention relates to a Honeycomb condenser system for film projectors with spherical optical elements for Imaging of a light source in the image window and two in the imaging beam path arranged lens grids, each consisting of a large number of elementary lenses, from the front (the image field lens grid) each individual lens is the light source images onto a corresponding lens of the rear (the luminous field lens grid), while this lens is the corresponding lens of the field lens grid in the whole Image window.
Optische Systeme aus zwei Linsenrastern sind bekannt, aber bei diesen Systemen bildet jedoch nicht jede Linse des hinteren Leuchtfeldlinsenrasters die entsprechende Linse des vorderen Bildfeldlinsenrasters auf das ganze Bildfenster ab.Optical systems made up of two lens grids are known, but these are the case However, not every lens of the rear luminous field lens grid forms the systems corresponding lens of the front image field lens grid on the entire image window away.
Die der vorliegenden Erfindung zugrunde liegenden Wabenkondensoren hatten bisher eine solche Form, daß die Krümmungsmittelpunkte jeder der Wabenf(ächen auf je einer achsenparallelen Geraden, die durch die Mitte der einzelnen Wabe hindurchgeht, liegen, so daß die in der Mitte jeder Wabe an diese angelegte Tangentialebene rechtwinklig zur optischen Achse steht.The honeycomb condensers on which the present invention is based hitherto had such a shape that the centers of curvature of each of the honeycomb f (surfaces on a straight line parallel to the axis that goes through the middle of the individual honeycomb, lie so that the tangential plane applied to this in the center of each honeycomb is at right angles to the optical axis.
Solche Wabenkondensorsysteme setzen zur Abbildung der Lichtquelle in das Bildfenster voraus, daß der Grundkondensor mit den dafür erforderlichen optischen Gliedern (Spiegeln und Linsen) bei genügend großer Lichtquelle schon für sich allein Gleichmäßigkeit in der Ausleuchtung des Bildfensters gewährleistet. Die beiden Linsenraster dienten dazu, bei Projektion mit kleineren Bogenlampenkratern, falls ein geringerer Lichtstrom ausreichend war, eine gleichmäßige Ausleuchtung des Bildfensters zu erzielen. Die durch die Mitten einander entsprechender Waben der beiden Raster verlaufenden Hauptstrahlen werden durch die Waben selbst nicht beeinflußt. Ihr Verlauf ist allein durch jene optischen Glieder des Grundkondensors bestimmt.Such honeycomb condenser systems are used to image the light source in the picture window that the basic condenser with the necessary optical Structuring (mirrors and lenses) with a sufficiently large light source alone Uniformity in the illumination of the picture window guaranteed. The two lens grids were used for projection with smaller arc lamp craters, if a smaller one Luminous flux was sufficient to achieve uniform illumination of the picture window. The honeycombs of the two grids running through the centers of corresponding one another Main rays are not influenced by the honeycomb itself. Your course is alone determined by those optical members of the basic condenser.
Für sehr lichtstarke Projektionsobjektive läßt sich bei den bisher bekannten Wabenkondensorsystemen dieser Art ein einigermaßen aberrationsfreier Verlauf dieser Wabenhauptstrahlen nur durch Verwendung einer größeren Anzahl sphärischer optischer Glieder oder durch Verwendung asphärischer Flächen ermöb lichen.For very bright projection lenses, the previously known honeycomb condenser systems of this type have a somewhat aberration-free course of these honeycomb main rays only by using a larger number of spherical ones optical elements or by using aspherical surfaces.
Die Erfindung bezweckt, diesen Mangel zu beseitigen und mit möglichst wenigen sphärischen Flächen, ohne daß asphärische Flächen erforderlich sind, einen Kondensor zur Verfügung zu stellen, der bei Verwendung einer Höchstdrucklampe das Schmalfilmformat gleichmäßig ausleuchtet und erlaubt, die Lichtstärke beispielsweise eines Projektionsobjektivs 1:1,2 weitgehend auszunutzen.The invention aims to eliminate this deficiency and with as possible a few spherical surfaces without the need for aspherical surfaces To make available a condenser that, when using a high pressure lamp, has the Narrow film format evenly illuminates and allows the light intensity, for example of a projection lens 1: 1.2 to a large extent.
Nach der Erfindung wird dies dadurch erreicht, daß die Elementarlinsen jedes der beiden Raster mit von der Mitte bis zum Rand des Rasters zunehmender Wirkung keilförmig so ausgebildet werden, daß bei den Wabenftächen, abgesehen von der symmetrisch zur optischen Achse des Kondensors liegenden Mittelwabe, die in der Mitte der einzelnen Waben angelegte Tangentialebene einen von 90° abweichenden Winkel mit der optischen Achse bildet. Dabei ist diese Abweichung des Winkels von 90° um so stärker, je weiter die betreffende Wabe von der optischen Achse entfernt ist. Dies bedeutet, daß die Elementarlinsen zu einem wesentlichen Teil die sammelnde Wirkung jener sphärischen optischen Glieder übernehmen und die erforderliche Abknickung der Wabenhauptstrahlen verursachen.According to the invention this is achieved in that the elementary lenses each of the two grids with increasing effect from the center to the edge of the grid be wedge-shaped so that the honeycomb surfaces, apart from the symmetrical to the optical axis of the condenser lying central honeycomb, which is in the middle of each The tangential plane created by the honeycomb has an angle deviating from 90 ° with the optical one Axis forms. This deviation of the angle from 90 ° is greater the further the honeycomb in question is removed from the optical axis. This means that the Elementary lenses to a large extent the collecting power of those spherical ones take over optical elements and the necessary kinking of the main honeycomb rays cause.
In den Veröffentlichungen über die für die vorliegende Erfindung als bekannt vorausgesetzten Wabenkondensoren ist bereits vorgeschlagen worden, zur Beseitigung von Fehlern der sphärischen Aberration, mit denen die bei der Abbildung der Lichtquelle mitwirkenden sphärischen optischen Gliederbehaftet sind, die Elementarlinsen der Raster nicht symmetrisch zum optischen Mittelpunkt, sondern symmetrisch zum Mittelpunkt der Leuchtfeldbilder zu begrenzen. Eine gewisse keilige Wirkung tritt auch dadurch ein, doch ist der der vorliegenden Erfindung entsprechende Grundgedanke, daß die sammelnde Wirkung jener sphärischen optischen Glieder zu einem wesentlichen Teil den Elementarlinsen der Raster übertragen ist, nicht verwirklicht.In the publications on the for the present invention as known presupposed honeycomb condensers has already been proposed for elimination of errors in spherical aberration with which the image of the light source contributing spherical optical links, the elementary lenses of the Grid not symmetrical to the optical center, but symmetrical to the center to limit the luminous field images. A certain wedge effect also occurs as a result a, but the basic idea consistent with the present invention is that the the collecting effect of those spherical optical elements becomes an essential one part the elementary lenses of the grid is transferred, not realized.
In der Zeichnung ist ein der Erfindung gemäß ausgebildetes Wabenkondensorsystem veranschaulicht. Abb.1 ist ein Schnitt entlang der optischen Achse; Abb.2 und 3 sind Ansichten des Büdfeldlinsenrasters und des Leuchtfeldlinsenrasters.The drawing shows a honeycomb condenser system designed in accordance with the invention illustrated. Fig.1 is a section along the optical axis; Fig. 2 and 3 are views of the Büdfeld lens grid and the luminous field lens grid.
Das Kondensorsystem enthält eine Lichtquelle 1 sowie vier sphärische Sammellinsen 2, 3, 4 und 5, von denen 3, 4 und 5 plankonvex sind. Mit der ebenen Fläche der Linse 3 sind die Elementarlinsen 6 des Bildfeldlinsenrasters verkittet, die in parallelen Reihen aneinanderschließen, von Reihe zu Reihe gegeneinander versetzt sind und deren Umrißformen der Umrißform des Bildfensters 7 gleichen (s. Abb. 2). Entsprechend sind mit der ebenen Fläche der Linse 4 die Elementarlinsen 8 des Leuchtfeldlinsenrasters verkittet, die von rhombischer Umrißform sind (s. Abb. 3). Die Elementarlinsen jedes Rasters sind keilig so ausgebildet, daß sie in ihrer Gesamtheit die Wirkung einer Fresnel-Platte haben. Die Brennweite der Elementarlinsen 6 des Bildfeldlinsenrasters ist so bemessen, daß jede dieser Linsen die Lichtquelle 1 je in die zugeordnete Elementarlinse 8 des Leuchtfeldlinsenrasters abbildet, während die Brennweite der Elementarlinsen 8 so gewählt ist, daß jede von ihnen die zugeordnete Elementarlinse 6 vergrößert in das Bildfenster abbildet.The condenser system contains a light source 1 and four spherical converging lenses 2, 3, 4 and 5, of which 3, 4 and 5 are plano-convex. The elementary lenses 6 of the image field lens grid are cemented to the flat surface of the lens 3; Correspondingly, the elementary lenses 8 of the luminous field lens grid, which have a rhombic outline shape, are cemented to the flat surface of the lens 4 (see Fig. 3). The elementary lenses of each grid are wedge-shaped so that in their entirety they have the effect of a Fresnel plate. The focal length of the elementary lenses 6 of the image field lens grid is dimensioned so that each of these lenses images the light source 1 into the associated elementary lens 8 of the luminous field lens grid, while the focal length of the elementary lenses 8 is chosen so that each of them enlarges the associated elementary lens 6 into the image window maps.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEV10620A DE1154290B (en) | 1956-05-11 | 1956-05-11 | Honeycomb condenser system for film projectors |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEV10620A DE1154290B (en) | 1956-05-11 | 1956-05-11 | Honeycomb condenser system for film projectors |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1154290B true DE1154290B (en) | 1963-09-12 |
Family
ID=7573162
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEV10620A Pending DE1154290B (en) | 1956-05-11 | 1956-05-11 | Honeycomb condenser system for film projectors |
Country Status (1)
Country | Link |
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DE (1) | DE1154290B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4368951A (en) * | 1980-01-07 | 1983-01-18 | Blom C James | Method of making a mold for a segmented mirror |
EP0788006A2 (en) * | 1996-02-01 | 1997-08-06 | Texas Instruments Incorporated | Improvements in or relating to spatial light modulators |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1081210A (en) * | 1913-03-06 | 1913-12-09 | Corning Glass Works | Fresnel lens. |
GB168255A (en) * | 1920-09-13 | 1921-09-01 | Arthur Prince | Improvements in and relating to safety locking devices for the doors of railway carriages |
AT97322B (en) * | 1920-02-16 | 1924-06-25 | Corning Glass Works | Projector. |
US1762932A (en) * | 1927-05-11 | 1930-06-10 | Eastman Kodak Co | Projection system for color pictures |
DE554037C (en) * | 1932-07-04 | Zeiss Ikon Ag | Condenser | |
US2082100A (en) * | 1933-09-07 | 1937-06-01 | Holophane Co Inc | Light spreading lens |
GB660352A (en) * | 1948-01-08 | 1951-11-07 | Holophane Sa | Lenses for light projectors and projectors incorporating the same |
GB741127A (en) * | 1951-12-19 | 1955-11-30 | Harold Martin | Improvements in and relating to optical light-projecting systems particularly for diascopic projection |
-
1956
- 1956-05-11 DE DEV10620A patent/DE1154290B/en active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE554037C (en) * | 1932-07-04 | Zeiss Ikon Ag | Condenser | |
US1081210A (en) * | 1913-03-06 | 1913-12-09 | Corning Glass Works | Fresnel lens. |
AT97322B (en) * | 1920-02-16 | 1924-06-25 | Corning Glass Works | Projector. |
GB168255A (en) * | 1920-09-13 | 1921-09-01 | Arthur Prince | Improvements in and relating to safety locking devices for the doors of railway carriages |
US1762932A (en) * | 1927-05-11 | 1930-06-10 | Eastman Kodak Co | Projection system for color pictures |
US2082100A (en) * | 1933-09-07 | 1937-06-01 | Holophane Co Inc | Light spreading lens |
GB660352A (en) * | 1948-01-08 | 1951-11-07 | Holophane Sa | Lenses for light projectors and projectors incorporating the same |
GB741127A (en) * | 1951-12-19 | 1955-11-30 | Harold Martin | Improvements in and relating to optical light-projecting systems particularly for diascopic projection |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4368951A (en) * | 1980-01-07 | 1983-01-18 | Blom C James | Method of making a mold for a segmented mirror |
EP0788006A2 (en) * | 1996-02-01 | 1997-08-06 | Texas Instruments Incorporated | Improvements in or relating to spatial light modulators |
EP0788006A3 (en) * | 1996-02-01 | 2000-03-01 | Texas Instruments Incorporated | Improvements in or relating to spatial light modulators |
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