Optical arrangement for coupling light into a light guide, lighting device and display with such an optical arrangement

Abstract

Optical arrangement (1) with at least one light source (2), an optical fiber (3) and a coupling device (5), wherein the coupling device (5) has at least one concave mirror (4) for coupling light into the optical fiber (3), wherein the coupling device (5) is arranged directly on the optical fiber (3) or is mechanically connected directly to the optical fiber (3), wherein the concave mirror (4) is designed and arranged such that only the light reflected by the concave mirror (4) reaches the optical fiber (3) or is coupled into the optical fiber (3) and that the concave mirror (4) collimates the light from the light source (2), characterized in that the light source (2) is formed by a coupling point in a further optical fiber or in an optical fiber or that the light sources (2) are each formed by one of several coupling points in a further optical fiber or in an optical fiber.and that a coupling device (14) is arranged at a coupling side (13) of the optical fiber (3), which is designed as a holographic grating.

Description

[0001] The invention relates to a device for coupling light into a, in particular planar, light guide, in particular a light guide of a backlighting device for a display, wherein the device has at least one concave mirror.

[0002] The invention also relates to an optical arrangement, in particular a lighting device, in particular a backlighting device for a display with such a device, as well as a display with such a device and / or such an optical arrangement.

[0003] From JP 2006 058480 A, a backlight unit for an LCD display is known. The backlight unit is designed for direct transmitted light illumination of an LCD (Liquid Crystal Device) without the use of a light guide and features a plurality of elongated light sources arranged parallel to each other, positioned behind the back of the LCD to be illuminated. To utilize light that is not emitted directly onto the LCD, paraboloid mirrors are provided to deflect this light towards the LCD. This backlight unit has the particular disadvantage of requiring a considerable amount of installation space. A particularly flat display cannot be manufactured with such a backlight unit.

[0004] Displays with planar, flat light guides for backlighting a pixel matrix or a controllable, spatial light modulator are more advantageous in terms of installation space requirements and are known in various embodiments. For example, defects can be provided on one of the reflective layers to extract the light propagating in the light guide. The use of a flat light guide for backlighting has the particular advantage that it can be designed with a flatter profile.

[0005] Such an arrangement is known, for example, from the scientific publication "Short period holographic structures for backlight display applications," Roberto Caputo et al., OPTICS EXPRESS 10540, Vol. 15, No. 17. This arrangement has the disadvantage that a large portion of the light from the light source is lost before being coupled into the optical fiber or leaves the optical fiber prematurely due to incorrect coupling angles.

[0006] WO 2004 / 109380 A1 discloses a scanning backlight device for a flat panel display. In this device, the light from matrix-arranged LEDs (Light Emitting Diodes) is reflected by means of a cylindrical mirror into the thick end of a wedge-shaped, essentially flat light guide. This arrangement, however, still requires too much installation space, and a significant portion of the light generated by the LEDs is lost.

[0007] The object of the present invention is to provide a device for coupling light into a, in particular planar, optical fiber which enables a high and constant coupling efficiency with low installation space requirements.

[0008] The problem is solved by a device of the type mentioned above, which is characterized in that the coupling device is designed and intended to be arranged directly on the optical fiber and / or to be mechanically connected directly to the optical fiber.

[0009] According to the invention, it was recognized that the proportion of light available for illuminating, for example, a pixel matrix depends in particular on the degree of divergence of the light coupled into the optical fiber. Simply positioning a light source in the immediate vicinity of the coupling point of the optical fiber has proven inefficient. Rather, it is advantageous if the light is coupled into the optical fiber in such a way that, after coupling, it can propagate within the optical fiber while maintaining the critical angle for total internal reflection – based on the optical properties of the optical fiber.

[0010] This can generally be achieved, for example, with the help of an imaging optic. However, an imaging optic, which usually uses lenses for this purpose, has the disadvantage of requiring a large amount of installation space, which will be explained further below using the following examples. Fig. 5 is explained in detail. Therefore, according to the invention, a coupling device is provided which has at least one concave mirror, which allows a folding of the beam path.

[0011] Furthermore, it has been shown that this alone is neither sufficient to achieve a particularly small installation space nor to achieve a particularly high coupling efficiency. According to the invention, a number of advantages are associated with a direct arrangement of the coupling device on the optical fiber and / or with a direct mechanical connection of the coupling device to the optical fiber. Firstly, it ensures that a large part of the radiation cone of a light source, or even the entire radiation cone of a light source, can be used for coupling into the optical fiber. This is particularly due to the resulting close spatial proximity and the associated fact that the dimensions of the light beams can be kept small.Due to this compact design and the resulting stable positioning of the coupling device relative to the optical fiber, the coupling efficiency is very constant over time when using the coupling device according to the invention. Even if fluctuations in the relative positioning were to occur, these would generally have no significant impact on the coupling efficiency due to the special arrangement and compact design.

[0012] In a particular embodiment, which is especially advantageous when using a point light source, the concave mirror is designed as a parabolic mirror or a spherical mirror. Particularly when using elongated and / or linear light sources, the concave mirror can advantageously be designed as an astigmatic mirror, especially as a cylindrical or paraboloid mirror.

[0013] In a particularly advantageous embodiment, several concave mirrors are provided. In particular, several concave mirrors can be provided, each configured as a parabolic or spherical mirror, and / or as an astigmatic mirror, especially as a cylindrical or paraboloidal mirror. With such an arrangement, the light from several light sources can be coupled into an optical fiber. It can be advantageously provided that the several concave mirrors are arranged in a single row and / or in a double row and / or along a straight line.

[0014] In a particularly advantageous embodiment, which can be made especially compact and robust, several concave mirrors share a common substrate. Alternatively, it is of course also possible for each concave mirror to have its own substrate.

[0015] Another particularly compact and robust design is one in which the concave mirror or several concave mirrors reflect light from a light source according to the principle of total internal reflection. In such an embodiment, a mirror coating (e.g., metallic or dielectric) can be advantageously omitted without impairing the reflection efficiency.

[0016] In particular, such a design – but also other embodiments – can be configured such that the concave mirror or at least a substrate of the concave mirror is manufactured by molding and / or by embossing, especially by hot stamping, or that the concave mirrors or at least a substrate of the concave mirrors are manufactured by molding and / or by embossing, especially by hot stamping. Such a manufacturing method allows the formation of even large-scale modular units, in particular those containing several concave mirrors. This enables cost-effective production of the concave mirror(s). In particular, the optical fiber could be coupled to the concave mirror and / or the substrate during or immediately after the stamping process.

[0017] Particularly for shaping the light emitted from the light source into a beam with a predetermined divergence or into a collimated beam, it is usually sufficient to arrange a single concave mirror in the light path between the light source and the optical fiber. However, especially for expanding the light path and for specifically shaping the coupled light beam, it can also be advantageous to arrange several concave mirrors optically in series and / or to have the light from a light source successively reach different concave mirrors.

[0018] To correct imaging errors of the concave mirror and / or other optical components in the light path, an advantageous embodiment of the optical arrangement includes corrective optics. In particular, the corrective optics may have a coupling surface for directly coupling the device to an optical fiber, for example, the end face of a planar optical fiber.

[0019] For example, the coupling device may have an exit window, which may be a surface of a corrective optic and is intended to be attached directly to the light guide – for example by means of an optical adhesive.

[0020] The corrective optics can be designed, in particular, as a Schmidt corrector plate. A Schmidt corrector plate helps to eliminate spherical aberrations and coma aberrations by influencing different parts of the total light beam of the coupled light in different ways. For this purpose, the corrective optics can, for example, have different optical thicknesses at different points and / or be curved in certain areas. It is particularly advantageous—especially with regard to coupling efficiency—if the interaction of the concave mirror and the corrective optics results in the light emanating from the coupling device and coupled into the optical fiber having a plane wavefront.

[0021] The aforementioned problem is also solved by an optical arrangement comprising at least one light source, a light guide (in particular a planar one), and a device according to the invention. The optical arrangement can be configured, in particular, as a lighting device, especially as a backlight device for a display, particularly for a stereoscopic or holographic 3D display, as described above. Such an optical arrangement can be designed to be particularly compact. Furthermore, such an optical arrangement offers the particular advantage that it can be designed as a prefabricated module that can be installed as a whole, for example, in a display.Due to the advantages already mentioned regarding the coupling device, specifically concerning the achievable consistency of the coupling efficiency of the light source and the achievable robustness, there is – particularly in a modular design – largely no risk of an unintended deterioration of the coupling efficiency when installing such an optical arrangement – ​​especially in a modular design.

[0022] In a particularly efficient version of such an optical arrangement, the concave mirror is designed and positioned in such a way that only the light reflected by the concave mirror reaches the light guide and / or is coupled into it. This effectively prevents light from entering the light guide at an undesirable angle of incidence and ultimately, since it cannot propagate as intended – especially with regard to total internal reflection – exiting the light guide as stray light that can negatively affect the image characteristics of a display.

[0023] In a particularly advantageous embodiment, the concave mirror is designed and arranged such that it collimates the light from the light source. This embodiment has the special advantage that all light rays of the coupled light have the same direction of propagation, so that all light rays can be coupled into the optical fiber at a predetermined or optimal angle of incidence; namely, at an angle of incidence that ensures propagation of the coupled light within the optical fiber, in particular total internal reflection at one of the interfaces of the optical fiber. Alternatively or additionally, the concave mirror is designed and arranged such that the light source is located in a focal plane of the concave mirror. Alternatively or additionally, it can also be provided that several light sources are each arranged in a focal plane of one of several concave mirrors.

[0024] In a special embodiment, which enables not only collimation but also simultaneous folding of the beam path of the coupled light, and thus compactness and adaptability to the respective given spatial boundary conditions, it is provided that the light source is arranged outside the focal point of the concave mirror and / or that several light sources are each arranged outside the focal points of one of several concave mirrors.

[0025] In a particularly advantageous embodiment of the optical arrangement, which can be especially robust and very compact, the concave mirror is arranged directly adjacent to the optical fiber. Alternatively or additionally, the concave mirror can be part of the optical fiber. In particular, it can be provided that the optical fiber, or at least one component of the optical fiber (especially an optical component), and the substrate of the concave mirror are manufactured together in one piece. For example, it can be provided that the optical fiber essentially comprises a plane-parallel plate or a wedge-shaped plate in which the light propagates between two interfaces, and that at least part of the coupling device, for example, the concave mirror or the substrate of the concave mirror, is manufactured in one piece with the plate.The shape of the concave mirror could be produced, for example, by milling, grinding, but especially by hot stamping.

[0026] In a design particularly suitable for a holographic display, multiple light sources are provided, wherein the individual light sources can be switched on and off independently or have their light output adjustable. In particular, multiple light sources can be provided, wherein the individual light sources can be switched on or off as needed for use in a display, especially a holographic display, depending on the image or information to be displayed, and / or their light output can be individually controlled depending on the holographic image or reconstruction to be displayed.

[0027] Many embodiments are possible with regard to the optical fiber. For example, it can be wedge-shaped or have two parallel reflective layers. In particular, it can be provided that the optical fiber has a light-guiding layer in which coupled light is guided between two essentially opposing, especially totally reflective, reflective layers.

[0028] In an advantageous embodiment, the concave mirror is designed and arranged such that it directs light emanating from the light source, particularly primarily at its front face, into the light guide. Such an embodiment has the particular advantage that a display equipped with such a coupling device can be made especially flat, because the essential components of the device can be arranged laterally.

[0029] In principle, virtually any type of light source can be used. Light sources that are nearly point-like or nearly linear are particularly advantageous because they allow for the generation of especially well-collimated light. Specifically, the light source can be formed by a coupling point in another optical fiber, and / or the light sources can each be formed by one of several coupling points in another optical fiber, particularly an optical guide. Alternatively or additionally, the light source can be configured to emit coherent light. In particular, the light source can be a laser, especially a semiconductor laser.

[0030] As already mentioned in relation to the coupling device, corrective optics can be provided to correct imaging errors of the concave mirror and / or other optical components present in the light path. In such an advantageous embodiment of the optical arrangement, it can be provided, in particular, that the corrective optics have a coupling surface for direct coupling to the optical fiber.

[0031] In particular, it may be provided that a corrective optic, especially a Schmidt corrector plate, is provided in the light path of the light emanating from the concave mirror and / or that a corrective optic, especially a Schmidt corrector plate, is provided between the concave mirror and the light guide. The corrective optic may, for example, be designed as a plate that has a different optical density or a different refractive index at different locations and / or that has a different thickness at different locations or whose interfaces have partially different curvatures.

[0032] Several of the optical arrangements can also be combined like tiles to form a large backlighting unit. The gaps between the combined tiles have a width d < 100 µm, for example, so that they cannot be resolved by the eye.

[0033] The aforementioned problem is also solved by a display and / or a 3D display, in particular a stereoscopic or holographic 3D display, which has a device according to the invention as described above and / or which has an optical arrangement according to the invention, because such a display can be particularly compact and optically stable. In particular, such a display has a constant coupling efficiency and thus exhibits a constant and fluctuation-free backlight with respect to light transmission – apart from intentionally controlled fluctuations in light output, for example by controlling the light output of the light source.

[0034] In particular, it is possible to manufacture such a display and / or 3D display in a modular design, whereby in particular the coupling device and / or the optical arrangement, which can be designed as a backlight unit, can be prefabricated as individual modules.

[0035] The invention is schematically depicted in the drawing and is described below with reference to the figures, whereby identical or similarly acting elements are mostly provided with the same reference numerals. The figures show:

[0036] Fig. 1 a first embodiment of an optical arrangement according to the invention with a device according to the invention,

[0037] Fig. 2 another embodiment of an optical arrangement according to the invention with a device according to the invention,

[0038] Fig. 3 an embodiment of a device according to the invention,

[0039] Fig. 4 another embodiment of a device according to the invention and

[0040] Fig. 5 an optical arrangement according to the invention compared to an arrangement with lenses.

[0041] Fig. Figure 1 shows an optical arrangement according to the invention. 1 , which is designed as a backlighting device for a display. The optical arrangement 1 indicates a light source 2 and a flat optical fiber 3 on.

[0042] Furthermore, a device 5 for coupling light from the light source 2 provided for, which are arranged in a series of adjacent concave mirrors 4 exhibits the longitudinal extent of the series of adjacent concave mirrors. 4 runs perpendicular to the plane of the drawing, so that only one of the concave mirrors 4 can be seen. The concave mirrors 4are designed as parabolic mirrors.

[0043] The light source 2 It essentially consists of an optical fiber running perpendicular to the plane of the drawing, which has defects at equidistant intervals for coupling light out of the optical fiber, so that the defects essentially represent secondary individual light sources. Each concave mirror 4 is associated with a defect and thus with a secondary individual light source. Furthermore, every concave mirror 4 arranged in such a way relative to the associated fault location that it collimates the light emanating from the fault location.

[0044] The defects are located outside the focal point of the concave mirrors. 4 – also off-axis – arranged. This advantageously ensures that the light emanating from the defects is not only collimated, but also focused by the concave mirrors. 4directly – without coming into spatial conflict with the light source – into the light guide 3 is being diverted.

[0045] The concave mirrors 4 are directly attached to the light guide 3 arranged and preferably manufactured at least partially in one piece with it. The concave mirrors 4 Furthermore, they are designed and arranged in such a way that the light source 2 Outgoing light is totally reflected at the mirror plane.

[0046] On the coupling side 13 of the planar optical fiber 3 is a decoupling device 14 arranged as a holographic grating, which ensures that on every impact of the light within the optical fiber 3 propagating light is used to extract a portion of the light for backlighting, for example, a pixel matrix or an LCD that is not displayed (right-pointing arrows). 15). The holographic grating is not spatially constant but is designed such that the coupling efficiency η increases in a direction away from the coupling device in order to achieve a uniform light intensity of the coupled light across the entire surface of the optical fiber.

[0047] The concave mirrors 4 , can in particular be off-axis paraboloids in the form of a series at the lower end of an optical fiber designed as a plane-parallel, light-guiding plate 3 An off-axis paraboloid array can be attached to direct the light into total internal reflection. This array can be created by molding a plastic material – particularly as a single piece and / or together with the plate. If not all angles are reflected under total internal reflection, an additional external mirror coating could be applied.

[0048] Fig. Figure 2 shows another embodiment of an optical arrangement according to the invention. 1 with a device according to the invention 5 , which are a double row of concave mirrors, each designed as a parabolic mirror 4 features. Even in this design, each concave mirror 4 a light source 2 assigned. The design shown has the particular advantage that a particularly large amount of light enters the light guide. 3 can be coupled in, and therefore the backlighting device is very bright.

[0049] Fig. Figure 3 shows an embodiment of a device according to the invention. 5 to couple the light from a light source 2 outgoing light into an optical fiber (not shown in this figure). The light emerging from a defect in the light source, which is designed as an optical fiber, is then transferred to an optical fiber. 2 exiting, encounters a first aperture 6and a second aperture 7 The apertures 6 , 7 are arranged one behind the other and serve, on the one hand, to limit the light cone in order to block out stray light, and on the other hand, to homogenize the intensity distribution of the wavefront of the collimated, coupled-in light.

[0050] The device 5 It also features a correction plate 8 for correcting imaging errors of the concave mirror 4 Specifically, it is a transparent plate that has different thicknesses at different points.

[0051] The concave mirrors 4 exhibit a substrate 9 on, which has a dielectric or metallic reflective coating 10 is provided.

[0052] Fig. Figure 4 shows another embodiment of a device according to the invention. 5concave mirrors that reflect according to the principle of total internal reflection 4 This device also features 5 a correction plate 8 on, whose material has a different refractive index at different points. Into the aperture 7 An apodization profile is integrated, which homogenizes the radiation characteristics and ensures that a homogeneous intensity distribution is present at the output of the collimation unit.

[0053] Fig. Figure 5 shows in the right-hand illustration a further embodiment of an optical arrangement according to the invention. 1 with a fiber optic cable 3 and an optical device according to the invention 5 for coupling the light from a light source 2 into the optical fiber 3 The optical fiber 3 In this version, it is wedge-shaped. Furthermore, the device has... 5 a decoupling device14 which essentially works like the one in Fig. 1 shown decoupling device 14 , however, here – in contrast to the Fig. 1 – across the area of ​​the extraction, for example, there is an almost constant extraction efficiency.

[0054] The diagram on the left schematically shows an optical device with a similar mode of operation. However, this device uses concave mirrors instead of concave mirrors. 4 lenses 11 on which apertures 12 are subordinate. It is clearly evident that such a device requires significantly more installation space than the device according to the invention. 5 .

[0055] Since the area of ​​spatial coherence has a minimum diameter of, for example, 5 mm and corresponds to the lens diameter, the approach of using an increased number of lenses (left illustration) cannot be pursued further. This means that, in the design shown on the left, it would not be possible to simply use, for example, a row of four lenses with the same numerical aperture and shorter overall length to further reduce the overall length of the collimation unit.

[0056] The numerical aperture of refractive lenses – for example, those made from molded lenses – is limited by the minimum radius of curvature κ that can be manufactured. However, with the same radius of curvature, a mirror has only 1 / 4 the focal length of a refractive lens with a refractive index n = 1.5. This can be used to advantageously reduce the overall length of the collimation unit.

[0057] Even if the reduction in length only refers to the collimation unit and does not seem absolutely necessary for desktop monitors, it results in a significantly more compact design for mobile ASD and holographic display devices using off-axis paraboloids than is the case for refractive lenses.

[0058] Instead of a series of off-axis paraboloids, analogous to the left-hand representation in Fig. Figure 5, which shows the use of a double row of lenses, also shows a double row of off-axis paraboloids being used, with the individual mirrors, for example, each providing a collimated wavefront of dimensions 5 mm × 5 mm.

[0059] In principle, diffractive lenses and holographic off-axis lenses can also be used to achieve a higher numerical aperture and thus a reduction in the overall length of the collimation unit, however, a refractive surface is easier to manufacture than these diffractive elements.

[0060] Since laser diodes are typically used for holographic backlighting units, and spatial incoherence of the radiation must be generated in one direction during 1D encoding, a dynamic scatterer can be advantageously placed directly behind the exit surfaces of the optical fiber. This can be a segment of a scattering foil deflected by a small magnetic coil. If there is insufficient space around the fiber, the focal length of the off-axis paraboloids could be increased slightly to accommodate the dynamic scatterer.

[0061] The invention has been described with regard to a particular embodiment. However, it is understood that modifications and adaptations can be made without departing from the scope of protection of the following claims. QUOTES INCLUDED IN THE DESCRIPTION

[0062] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0063] JP 2006058480 A

[0003] WO 2004 / 109380 A1

[0006] Cited non-patent literature

[0064] “Short period holographic structures for backlight display applications,” Roberto Caputo et al., OPTICS EXPRESS 10540, Vol. 15, No. 17

[0005]

Claims

[1] Device ( 5 ) with at least one concave mirror ( 4 ) for coupling light into a, in particular planar, optical fiber ( 3 ), in particular a fiber optic cable ( 3 ) a backlighting device for a display, characterized by that the device ( 5 ) is designed and intended for coupling directly onto the optical fiber ( 3 ) arranged and / or directly connected to the light guide ( 3 ) to be mechanically connected. [2] Device ( 5 ) according to claim 1, characterized in that a. the concave mirror ( 4 ) is designed as a parabolic mirror or as a spherical mirror, or that b. the concave mirror ( 4 ) is designed as an astigmatic mirror, in particular as a cylindrical mirror or praboloidal mirror. [3] Device ( 5) according to one of claims 1 or 2, characterized in that several concave mirrors ( 4 ) are provided and / or that several are used as concave mirrors ( 4 ) are provided, which are designed as parabolic or spherical mirrors, and / or as astigmatic mirrors, in particular as cylindrical or paraboloid mirrors. [4] Device ( 5 ) according to claim 3, characterized in that the multiple concave mirrors ( 4 ) are arranged in a row and / or in a double row and / or along a straight line. [5] Device ( 5 ) according to claim 3 or 4, characterized in that several concave mirrors ( 4 ) have a common substrate or that each concave mirror ( 4 ) has its own substrate. [6] Device ( 5 ) according to one of claims 1 to 5, characterized in that the concave mirror ( 4 ) or the multiple concave mirrors ( 4) Light from a light source ( 2 ) reflect according to the principle of total reflection. [7] Device ( 5 ) according to one of claims 1 to 6, characterized in that the concave mirror ( 4 ) or at least a substrate of the concave mirror ( 4 ) is produced by molding and / or by embossing, in particular by hot stamping, or that the concave mirrors ( 4 ) or at least a substrate of the concave mirrors ( 4 ) is produced by molding and / or by embossing, in particular by hot stamping. [8] Device ( 5 ) according to one of claims 1 to 7, characterized in that several concave mirrors ( 4 ) are optically connected in series and / or that the light from a light source ( 2 ) different concave mirrors one after the other ( 4 ) reached. [9] Device ( 5) according to one of claims 1 to 8, characterized in that at least one corrective optic, in particular a Schmidt corrective plate ( 8 ). [10] Optical arrangement ( 1 ), in particular a lighting device, in particular a backlighting device for a display, in particular for a stereoscopic or holographic 3D display, with at least one light source ( 2 ), a, in particular planar, optical fiber ( 3 ) and a device ( 5 ) according to any one of claims 1 to 9. [11] Optical arrangement ( 1 ) according to claim 10, characterized in that the concave mirror ( 4 ) is designed and arranged in such a way that only the concave mirror ( 4 ) reflected light by the light guide ( 3 ) reached and / or into the optical fiber ( 3 ) is coupled in. [12] Optical arrangement ( 1) according to claim 10 or 11, characterized in that the concave mirror ( 4 ) is designed and arranged in such a way that it directs the light from the light source ( 2 ) collimated and / or that the concave mirror ( 4 ) is designed and arranged in such a way that the light source ( 2 ) in a focal plane of the concave mirror ( 4 ) is arranged and / or that multiple light sources ( 2 ) each in a focal plane of one of several concave mirrors ( 4 are arranged. [13] Optical arrangement ( 1 ) according to claims 10 to 12, characterized in that the light source ( 2 ) outside the focal point of the concave mirror ( 4 ) is arranged and / or that multiple light sources ( 2 ) each outside the focal points of one of several concave mirrors ( 4 are arranged. [14] Optical arrangement ( 1 ) according to claims 10 to 13, characterized in that a. the device ( 5 ) for coupling directly onto the optical fiber ( 3 ) is arranged and / or that b. the device ( 5 ) for coupling directly with the optical fiber ( 3 ) is mechanically connected and / or that c. the device ( 5 ) for coupling and the optical fiber ( 3 ), into which light is to be coupled, have at least one common component. [15] Optical arrangement ( 1 ) according to one of claims 10 to 14, characterized in that the concave mirror ( 4 ) directly on the light guide ( 3 ) is arranged and / or that the concave mirror ( 4 ) Part of the optical fiber ( 3 ) is and / or that the optical fiber ( 3 ) and the substrate of the concave mirror ( 4 ) are manufactured together in one piece and / or that a component of the light guide, in particular an optical component ( 3) and the substrate of the concave mirror ( 4 ) are manufactured together in one piece. [16] Optical arrangement ( 1 ) according to one of claims 10 to 15, characterized in that a. multiple light sources ( 2 ) are provided and that the individual light sources ( 2 ) can be switched on and off independently of each other or have adjustable light output and / or that b. multiple light sources ( 2 ) are provided and that the individual light sources ( 2 ) for use in a display, in particular in a holographic display, depending on the image to be displayed or depending on the information to be displayed, can be switched on or off as needed, or that their light output can be individually controlled with regard to the light output depending on the holographic image or reconstruction to be displayed. [17] Optical arrangement ( 1 ) according to one of claims 10 to 16, characterized in that the light guide ( 3 ) has a light-guiding layer in which coupled light is guided between two essentially opposing, in particular totally reflecting, reflective layers. [18] Optical arrangement ( 1 ) according to one of claims 10 to 17, characterized in that the concave mirror ( 4 ) is designed and arranged in such a way that it is separated from the light source ( 2 ) outgoing light, especially mainly at the front end, into the light guide ( 3 ) steers. [19] Optical arrangement ( 1 ) according to one of claims 10 to 18, characterized in that the light source ( 2 ) is formed by a coupling point in another optical fiber, in particular an optical fiber, and / or that the light sources ( 2) each are formed by one of several coupling points in another optical fiber, in particular an optical fiber guide. [20] Optical arrangement ( 1 ) according to one of claims 10 to 19, characterized in that the light source ( 2 ) emits coherent light and / or that the light source ( 2 ) has a laser. [21] Optical arrangement ( 1 ) according to one of claims 10 to 20, characterized in that at least one corrective optic, in particular a Schmidt corrector plate, is provided and / or that in the light path of the concave mirror ( 4 ) outgoing light is provided with a corrective optic, in particular a Schmidt corrector plate, and / or that between the concave mirror ( 4 ) and the light guide ( 3 ) a corrective optic, in particular a Schmidt corrector plate, is provided. [22] Display and / or 3D display, in particular stereoscopic or holographic 3D display, with a device ( 5 ) according to any one of claims 1 to 9 and / or with an optical arrangement according to any one of claims 9 to 21.