Broadband holocam from UV to ir

Abstract

The invention relates to an imaging system, comprising: a waveguide; a first holographic in-coupling element, which is designed to redirect light of at least one first wavelength from a first field of view of the first in-coupling element at least in part within the waveguide; and at least one second in-coupling element, which is designed to redirect light of at least one second wavelength from at least one second field of view of the second in-coupling element at least in part within the waveguide, wherein the first in-coupling element and the second in-coupling element are spaced apart from each other and wherein the first and the at least one second field of view overlap one another at least in part.

Description

[0001] o6. August 2025 Carl Zeiss Jena GmbH Z17432OWO ANE / Ris

[0002] Broadband holocam from UV to IR

[0003] 1. Technical field

[0004] 5 The present invention relates to waveguide-based imaging systems, e.g. for holographic RGB cameras (RGB holocams). Examples of the invention are imaging systems based on holographic coupling elements for coupling light incident on the coupling elements into a waveguide. 2. Prior Art

[0005] Diffraction-based optical elements, such as gratings or holograms, can be used to deflect light incident on a waveguide within the waveguide. This allows, for example, the creation of customized imaging systems.5

[0006] Although waveguides can be designed in a variety of ways, for some applications they can be implemented as one or more disks, or integrated into them. The example of multiple disks could include laminated glass, which can consist of at least two glass disks, each connected by an intermediate layer, such as plastic, casting resin, and / or a laminated film. For example, light striking the waveguide (e.g., a disk) at a first position can be guided internally via the waveguide to another, second position on the waveguide (e.g., the disk), from where it can then be directed, for example, to a camera and / or an image sensor. Thus, the camera can be positioned at a location different from the first position, where it is not visible from the outside (e.g., through the disk).

[0007] Diffraction-based optical elements, such as holograms, can exhibit zero angular dependence in the spectral distribution of the deflected light. Therefore, when diffraction-based elements are used to collect light in imaging systems, a color-accurate image of the imaging system can sometimes only be achieved within a small portion of the theoretically available field of view (FOV). At angles of incidence outside this FOV, angle-dependent blue or red shifts can occur. Diffraction-based optical elements typically have an FOV that encompasses the solid angle from which incident light can be collected and / or deflected by the optical element. This can work well for essentially one wavelength. For example,Monochromatic holograms are designed to deflect light of a specific wavelength at a specific angle when it arrives from a predetermined direction, for example, along a central direction of the field of view (FOV). However, if the direction of incidence of the light deviates from the predetermined direction, a different color may be deflected along the predetermined direction instead of the actual color the hologram is intended to project. When such a diffraction-based element is used in imaging systems, unwanted spectral angular dependencies can occur: Depending on the angle, only a portion of the complete spectrum can be imaged, so spectral ranges for one or more corresponding angles are missing. As a result, images may display colors other than those intended. With RGB optical elements, this effect can cause a white light image to be created in a portion of the FOV.The complete spectrum (e.g., including red, green, and blue components) may be present, but stronger red or blue shifts can occur at the edges of the field of view. For a so-called complete spectrum, it may suffice if the spectrum includes, for example, red, green, and blue components. Accordingly, it does not have to encompass a complete, continuous spectrum across the entire visible range, but it can do so in some examples.

[0008] The present invention is therefore based on the objective of at least partially improving corresponding imaging systems, systems and associated methods.

[0009] 3. Summary of the invention

[0010] This problem is at least partially solved by the aspects described herein. A first aspect of the invention relates to an imaging system comprising: a waveguide and a first holographic coupling element (EE) configured to deflect light of at least a first wavelength from a first viewing area of ​​the first EE at least partially within the waveguide. Furthermore, the imaging system comprises a second EE configured to deflect light of at least a second wavelength from a second viewing area of ​​the second EE at least partially within the waveguide, wherein the first EE and the second EE are spaced apart from each other and wherein the first and second viewing areas at least partially overlap.

[0011] In some examples, at least a third optical element (EE) may be provided in the imaging system, configured to deflect light of at least one third wavelength from a respective third viewing field, at least partially, within the waveguide. The third EE may be spaced apart from the first and second EEs. The respective third viewing field may be at least partially superimposed on the first and / or second viewing field.

[0012] In some examples, it may also be intended that the first and second EE are adjacent to each other or partially overlap (e.g., if the first and second EE are at least partially stacked on top of each other and / or written into the same material via multiplexing), but are at least partially arranged adjacent to each other.

[0013] The understanding underlying the invention is explained below:

[0014] Basically, holograms are designed to project light of a specific wavelength (e.g., the exposure wavelength) at an angle ct v = o (i.e., along a central direction of incidence) striking the hologram, to deflect it at a predetermined angle. For example, ct v = o corresponds to a light incidence perpendicular to the surface of the waveguide and the EE. If the angle of incidence deviates from a v = o ab, so redshifted (for ct) can be used instead. v > o) or blueshifted light (ct v < o) are deflected along the direction of the specified deflection angle. This is a direct consequence of the fact that the EE are holographic or diffraction-based elements, in which such angle-dependent spectral shifts can occur. Thus, holograms typically exhibit a spectral angle dependence.

[0015] Thus, the following results directly from the spectral angular dependence described herein: For the field of view in the region a v > o the blue spectral range is missing and for a v < o the red spectral range. The field of view can, in principle, be described not only in angular coordinates but also, for example, in Cartesian coordinates, e.g., to determine a position within the FOV by a position / distance.

[0016] This presents the problem underlying the invention: If holograms are used for imaging purposes, a color-accurate image across the full spectral range is not possible with deviations of ct. v = o as difficult.

[0017] With regard to the imaging system io of Fig. a1-a1, this could mean that the EE 30 can be configured to reflect light of a specific color that strikes the EE at a specific angle of incidence (e.g., a). v = o), to redirect to AE 40.

[0018] If the angle of incidence deviates from ct v If the angle of incidence is reduced, the EE 30 may no longer be able to deflect light of this wavelength to the AE 40. Instead, light of a different wavelength may fulfill the spectral conditions to be deflected from the EE 30 to the AE. This results in the angle-dependent redshift or blueshift of the image, as described here, which is produced by the imaging system. Consequently, areas of the field of view (FOV) of the imaging system may not be imaged in the desired color, but rather with a redshift or blueshift.

[0019] The inventors recognized this problem and have at least partially solved it with the aspects described herein. In particular, the spacing allows the EEs to be optimized independently for the first and second wavelengths.

[0020] The first and second wavelengths are different and can differ, for example, by 10 nm or more, preferably by 50 nm or more, and particularly preferably by 100 nm or more. These differences can be determined, for example, based on the wavelengths that are most efficiently deflected when light is incident along a central direction of incidence of the respective field of view. By using several EEs that are spaced apart from each other and have overlapping fields of view, the following technical advantages can be achieved through the synergy of the aforementioned features:

[0021] Because the first EE and at least one second EE have overlapping fields of view, the absence of a spectral range in one area of ​​the first field of view can be compensated for by the fact that this spectral range is present in the corresponding area of ​​at least one second field of view.

[0022] This can be explained using a hologram in the visible spectral range (VIS) as a first example: In the center of the field of view, there is an area where – in the example of an RGB hologram – red, green, and blue color information is present. If the field of view covers angles larger than a certain angle a*, the blue spectral range, for example, is missing in the corresponding angular range. Since in this example the field of view is in the range ct vIf the blue spectral range is missing (because the wavelengths in this range are redshifted), the second optical element (EE) can, for example, be configured to deflect a further blueshifted wavelength (e.g., in the ultraviolet (UV) range) so that in the area of ​​the second field of view, the second EE can efficiently deflect precisely the wavelength missing in the corresponding area of ​​the first field of view. Redshifted UV wavelengths produce exactly the missing blue wavelength. If the field of view covers angles whose magnitude is greater than a certain angle α, the red spectral range is missing in the corresponding angular range. In this example, the red spectral range is specifically missing in the field of view in the area ct. v< a” (< o) represents the red spectral range (since the wavelengths in this range are blueshifted). Accordingly, the third EE can be configured to deflect a further redshifted wavelength (e.g., in the infrared (IR)), so that in the region of the third field of view, the third EE can efficiently deflect precisely the wavelength missing in the corresponding region of the first field of view. Blueshifted IR wavelengths result in precisely the missing red wavelength. This concept can, in principle, also be applied to EEs other than those described in this example.

[0023] Because the EEs are spaced apart, each EE can have a high

[0024] Efficiency and accuracy (e.g., written or produced separately) can be achieved without the typical quality losses that can occur when multiplexing holograms. Furthermore, filtering and interference effects that can occur when, for example, holograms are superimposed are avoided.

[0025] The respective field of view can be defined, for example, such that light of the central wavelength is deflected within it with at least a predetermined deflection efficiency (as described herein). This deflection efficiency can be, for example, 10% or more, or 50% or more. For example, the respective field of view can encompass a field of view that opens essentially conically from the EE. The field of view can therefore be defined, for example, by the maximum opening angle of the field of view within which the EE can deflect light. This can be, for example, 15°. 0 , 30°, 45 0 , 60°, 75 0or more relative to the central direction of incidence. The central direction of incidence can, for example, correspond to the direction of exposure of the EE.

[0026] In an exemplary embodiment, the first EE and the second EE can be arranged essentially parallel to each other. For example, there can be a parallel displacement such that the first EE and the second EE are located in at least partially different positions.

[0027] Especially in a corresponding parallel arrangement of the EEs, the compensation of missing spectral ranges between the EEs described herein becomes particularly apparent.

[0028] Parallelism can be defined, for example, by the fact that the longitudinal axes of the EE can be essentially parallel to each other. Lines that differ from each other by less than 5 arcseconds can be considered essentially parallel to each other. 0 , preferably tilted relative to each other by less than 1°.

[0029] It is emphasized that the properties described herein with reference to the second EE also apply accordingly to at least a third EE.

[0030] The EEs can, for example, each have a longitudinal axis and can preferably be configured to deflect the incident light in essentially the same way relative to the respective longitudinal axis. The longitudinal axis of an EE, e.g., of the first EE and the second EE (and optionally the third EE), can accordingly be defined, for example, by a straight line that is perpendicular to a central direction of the EE's field of view and perpendicular to a central deflection direction of the corresponding EE.

[0031] In some examples, the imaging system can be configured such that the first and second EEs (and optionally the third EE) deflect light from a first sub-region of the superposition area of ​​their fields of view at different wavelengths, e.g., the first and second wavelengths, respectively. Furthermore, the imaging system can be configured such that, from a second sub-region of the superposition area in which the first EE no longer deflects a certain wavelength (or spectral range), the second EE deflects light of that wavelength (or within that spectral range). Preferably, the second EE can be configured so that it does not deflect the certain wavelength (or spectral range) from the first sub-region.

[0032] Alternatively or additionally, the first EE can deflect a first spectral range from the first subrange, and / or the second EE can deflect a second spectral range from the first subrange. The first and second spectral ranges can be at least partially or even completely disjoint. The first EE can be designed such that light from the second subrange in the first spectral range is at least partially no longer deflected, so that a gap exists in the first spectral range in the second subrange. The second EE can be designed such that light from the second subrange is deflected out of this gap, so that this gap is at least partially closed.

[0033] The first sub-area can, for example, correspond to an area around a central direction of incidence of the first EE and / or the second EE (e.g., an angular range around ct). v= o). The second sub-area can, for example, correspond to an area that is spaced away from the central direction of incidence (e.g., an area with an angular deviation from the central direction of incidence by at least a predetermined threshold). For example, the second EE can be configured to deflect light from the second sub-area at a wavelength at which the first EE no longer deflects light from this sub-area. Thus, for example, a gap in the spectrum can arise because redshifted (or blueshifted) light relative to the first wavelength is no longer present in a specific sub-area of ​​the overlapping fields of view within the deflection spectrum of the first EE. This gap can, for example, be at least partially closed by light within this gap in the spectrum that is deflected from this sub-area by the second EE.For example, this may apply to an area of ​​the field of vision characterized by an angle of incidence that is emanating from a central direction of incidence (angle ct. v = o) deviates upwards (or downwards) by at least a certain threshold.

[0034] Alternatively or additionally, the imaging system can be configured to at least partially close a gap in the spectrum that arises from the absence of blueshifted (or redshifted) light relative to the first wavelength in the deflection spectrum of the first imaging element (EE) within a specific sub-region of the superposition of the fields of view. For this purpose, the third imaging element can be designed to deflect light from this sub-region within this gap in the spectrum. For example, this can apply to a region of the field of view characterized by an angle of incidence that differs from a central incidence direction (angle ct). v= o) deviates downwards (or upwards) by at least a certain threshold.

[0035] The first EE and the second EE can have superimposed fields of view, designed in such a way that the absence of a spectral range in one area (e.g. ct) v > a*) of the first field of vision is compensated by the fact that in a corresponding area (e.g. ct v > a*) of at least one second field of view that at least partially overlaps the aforementioned area of ​​the first field of view, this spectral range is present.

[0036] Alternatively or additionally, the first EE and the third EE can have superimposed fields of view designed in such a way that the absence of a spectral range in one area (e.g. ct) v < a”) of the first visual field is compensated for by the fact that in a corresponding area (e.g. ct v< a”) of at least a third field of view that at least partially overlaps the aforementioned area of ​​the first field of view, this spectral range is present.

[0037] In one example, the first EE and the second EE can be arranged essentially adjacent to each other along their longitudinal axis. This can include arrangements in which the longitudinal axes run parallel to each other and are lined up along the longitudinal axis, for example, so that the short sides (e.g., perpendicular to the longitudinal direction) of the EEs are adjacent to each other. In other examples, the longitudinal axes can also run parallel and close together.

[0038] In such an arrangement, the fields of view can overlap particularly advantageously, so that, for example, the compensation effect described herein can be used and / or high-quality overall images can be created based on the fields of view, e.g., as described herein.

[0039] For example, the first EE can comprise a VIS hologram, preferably a three- or multi-color hologram, most preferably an RGB hologram. The at least one second EE can, for example, comprise an IR hologram and / or a UV hologram.

[0040] Especially for the hologram combinations mentioned, the compensation of missing spectral ranges described herein can be achieved through the interaction of the EEs. Specifically, the second EE can be configured to redirect the missing wavelength in a region of the field of view where the first EE cannot. For example, in a peripheral area of ​​the first field of view, the red spectral range may no longer be redirected due to a blueshift. In this example, the second EE can be configured to redirect a wavelength from the (missing) red spectral range in precisely this peripheral area of ​​the second field of view (which may overlap with the peripheral area of ​​the first), as described herein, so that the second EE can compensate for the missing wavelength of the first EE.

[0041] For example, the VIS hologram, preferably the three- or multi-color hologram, and particularly preferably the RGB hologram, can be configured to deflect light from the visible spectral range, preferably between 380 nm and 780 nm. Accordingly, the first wavelength can, for example, lie between 380 nm and 780 nm (i.e., the VIS range). In one example, the VIS hologram can be configured as an RGB hologram to deflect red light (e.g., 690 nm to 710 nm), green light (e.g., 540 nm to 560 nm), and blue light (e.g., 430 nm to 450 nm) for the central incidence direction of the viewing field. This can be demonstrated, for example, by the transmission spectrum of the first EE exhibiting three (local) minima at the aforementioned wavelengths for the central incidence direction.In another example, the VIS hologram can be configured to be a monochromatic hologram, deflecting only one wavelength from the specified spectral range for the central direction of incidence of the field of view. The wavelengths mentioned can have a finite spectral width (e.g., expressed as a full width at half maximum of 20 nm or less).

[0042] For example, the IR hologram can be configured to deflect light from the IR spectral range, preferably between 780 nm and 1400 nm; and / or the UV hologram can be configured to deflect light from the UV spectral range, preferably between 315 nm and 380 nm. Accordingly, the second wavelength can be, for example, between 780 nm and 1400 nm (i.e., the NIR range) and / or between 315 nm and 380 nm (i.e., the UV-A range). In one example, the IR hologram and / or the UV hologram can be configured to deflect only one wavelength from the aforementioned spectral range as a monochromatic hologram for the central direction of incidence of the field of view. The aforementioned wavelengths can have a finite spectral width (e.g., expressed by a full width at half maximum of 20 nm or less).

[0043] The deflection (for the first and / or second EE) can occur for one or more wavelengths from the specified spectral ranges. The deflection efficiency can be greater than 50%, preferably greater than 80%, or particularly preferably greater than 90%. The deflection efficiency can be quantified, for example, by a transmission measurement (e.g., along a predetermined incidence direction, such as along the central incidence direction of the respective field of view). A deflection efficiency of greater than x% can be experimentally verified by reducing the transmission by more than x% relative to a reference transmission measurement (e.g., without a sample in the measurement beam or with an unexposed substrate in the measurement beam).

[0044] For the aforementioned wavelength ranges, the IR and / or UV hologram can compensate for the absence of the red or blue VIS spectral range of the VIS hologram at one spectral end, respectively. The VIS spectral range has the most applications, making efficient compensation particularly advantageous there.

[0045] In other embodiments, the EEs can be spaced apart from each other but instead (e.g. directly and / or over a surface) placed on top of each other - e.g. in embodiments with a VIS hologram and an IR and / or UV hologram as described herein.

[0046] In one example, the at least one first and at least one second wavelength can include an exposure wavelength (e.g. from the wavelength ranges mentioned herein) with which the respective EE was exposed and / or a central wavelength that is deflected with maximum efficiency in a center of the respective field of view.

[0047] Maximum efficiency in deflection can also affect local deflection maxima (e.g., the three colors in RGB holograms). For example, maximum deflection can be measured by a transmission spectrum that exhibits at least one (local or global) minimum for a given direction of incidence (e.g., the central direction of the field of view) at at least one wavelength.

[0048] For example, the imaging system described herein can further comprise at least one holographic output coupling element (AE), wherein the at least one AE can be configured to at least partially couple the deflected light out of the waveguide. Specifically, for example, an AE can be assigned to one or more output elements (EEs), and each can at least partially couple out its respective deflected light.

[0049] In principle, all characteristics described herein in relation to the EE can be transferred analogously to the (associated) AE and vice versa.

[0050] In exemplary embodiments of the imaging system, the at least one imaging unit (AE) can comprise a first AE and / or at least a second AE. The first AE can be configured to deflect at least part of the light of at least one first wavelength from the first field of view of the first AE to the first AE, and / or the second AE can be configured to deflect at least part of the light of at least one second wavelength from the second field of view of the second AE to at least one second AE.

[0051] In exemplary imaging systems with at least two AEs, an EE and an AE can each form a pair. For example, each EE can deflect light to exactly one AE and no other AE, and / or each AE can only receive deflected light from one EE and no other EE.

[0052] A paired arrangement can be a simple and efficient configuration in which each EE has an associated AE with which it forms a pair. The imaging system can have several essentially identical pairs tilted relative to each other and / or shifted relative to each other (e.g., in a planar or curved waveguide plane), and / or different pairs that can be adapted, for example, in their size, position, and / or orientation according to their intended function, in order to optimize the overall efficiency of the imaging system.

[0053] For example, a paired arrangement allows for an initial internal optimization of the interaction between the EE and AE of the pair, and separately, a fine-tuning of the pairs of the imaging system in their interaction during image generation, e.g., with regard to the color quality of the image over the largest possible area of ​​the field of view. For example, the EEs of a pair, as described herein, can be configured to deflect at least some of the light striking the EE of the pair to the AE of the pair.

[0054] If an energy exchanger (EE) and an energy exchanger (AE) are used as a pair, the EE of the pair can be configured to deflect light specifically to the respective AE of the pair, and the AE to couple the incoming deflected light out of the waveguide. This allows for precise tuning of the EE of the pair to the AE of the pair and vice versa, which can have a positive effect on the efficiency of light coupling, deflection, and coupling out within the imaging system.

[0055] For example, the AE of a pair can be arranged essentially parallel to the EE of the pair. In addition, and overall, the orientation or tilt of an AE can be defined as described herein for the EE.

[0056] A parallel arrangement can achieve particularly efficient light deflection, e.g. by allowing the AE to present the largest possible area perpendicular to the effective beam path of the light deflected by the EE.

[0057] If, in an example, the EE and AE of a pair exhibit a hologram, a characteristic axis can be defined for each, perpendicular to the first and second exposure directions by which the hologram is written, as described herein. A longitudinal axis can also be defined geometrically for typical EE and / or AE, e.g., for EE and / or AE that have the shape of an elongated rectangle, the perpendicular bisector along the longitudinal extent of the rectangle.

[0058] For parallel EE and AE, these characteristic axes and / or longitudinal axes can, for example, be parallel. This principle can be applied equally to all other possible axes that can be defined for the EE and AE of a pair.

[0059] The EE and AE of a pair can, for example, be designed such that the beam path between the EE and AE is essentially axially symmetric. Such an axially symmetric beam path from the EE to the AE can allow for a more uniform efficiency of light deflection across the entire imaging area than, for example, asymmetric beam paths, since, for example,

[0060] Absorption losses along the beam path occur approximately uniformly for all paths the light takes. This can, for example, optimize the uniformity of the image across the imaged field of view.

[0061] In exemplary embodiments, the EE and the AE can be arranged such that each has its own axis of symmetry and is positioned and oriented relative to each other such that the pair of EE and AE shares a common axis of symmetry. In such configurations, the path of the deflected light from the EE to the AE, for example, through the waveguide, can run approximately in a trapezoidal region between the EE and AE. The axis of symmetry of this trapezoid can define the effective beam path of the deflected light from the EE to the AE, which in this example is then axially symmetric.

[0062] For example, at least one AE can have a smaller surface area than one of the EE.

[0063] Large energy emitters (EEs) can generally be large compared to image emitters (AEs) in order to collect as much light as possible, which can positively affect image quality and the field of view (FOV). The light collected in this way can then be deflected to comparatively small image emitters (AEs), which, due to their small size, can concentrate the light and, for example, output it to a sensor.

[0064] The size of an EE and / or AE can be measured, for example, by its area, volume, and / or its extent along a characteristic axis.

[0065] In an exemplary embodiment, the imaging system can further comprise at least one light source, wherein the at least one light source can be configured to emit light at least partially into the first and / or second field of view. This allows the imaging system to be used not only for its imaging function (as described herein) but also, conversely, as an exposure system. Specifically, for example, the at least one light source can direct its emitted light onto at least one emitter, which deflects the emitted light at least partially within the waveguide to the associated emitter. The emitter can then be configured to extract the emitted light within its field of view. Thus, for example, precisely the area that can also be detected by the imaging system can be illuminated. If an object in the field of view is illuminated in this way, it can be imaged more effectively by the imaging system.

[0066] The synergy between the two functionalities (imaging and illumination) can become particularly apparent when at least one light source and the EE and / or AE are coordinated:

[0067] For example, the at least one light source may comprise a first light source configured to emit light from the visible spectral range, preferably between 380 nm and 780 nm, and / or comprise at least a second light source configured to emit light from the IR spectral range, preferably between 780 nm and 1400 nm, and / or configured to emit light from the UV spectral range, preferably between 315 nm and 380 nm.

[0068] This ensures that the emitted light reaches the emitter as efficiently as possible via the AE (Advanced Light Source) and is deflected from there into the field of view. Generally, it may be preferable to use spectral ranges outside the visible spectrum, as these are not perceived as disturbing or even at all by the user. On the other hand, the first light source could, for example, be set up to provide a flash for taking flash-exposed photographs.

[0069] The at least one light source can be configured to direct light, at least partially, onto the at least one emitter. For example, the at least one emitter can be configured to deflect the light emitted by the at least one light source, at least partially, within the waveguide and / or to the first and / or second emitter.

[0070] For example, the first and / or second EE can be configured to at least partially couple the light emitted by the at least one light source out of the waveguide.

[0071] The functionality of the EE and / or the AE, and especially their interaction, allows the light source to be located at a different position than the EE, i.e., beyond the point from which the light is emitted. This can be particularly advantageous in applications with specific installation space requirements or where the light source should not be visible (e.g., due to the waveguide), for example, to meet installation space requirements or to provide a more visually appealing product. In many application examples, the light source can be positioned on the side of the waveguide facing away from the field of view.

[0072] For example, the waveguide can have a first and a second surface opposite the first, which are separated from each other by an essentially constant layer thickness.

[0073] Such waveguides can therefore be particularly well suited to guiding the deflected light from the EE to the AE in a controlled manner through total internal reflection and with low losses, which can have a positive effect on the efficiency and image quality of the imaging system.

[0074] In an exemplary imaging system, at least one of the EEs can be located substantially on the first surface of the waveguide and / or the at least one AE can be located substantially on the second surface of the waveguide, i.e., on opposite sides of the waveguide. Alternatively, in another exemplary imaging system, at least one of the EEs and / or the at least one AE can be located substantially on the same (first or second) surface of the waveguide. If the EEs and AEs are located on opposite sides of the waveguide, the deflection of light from the EE to the AE is possible without reflection or by means of reflection within the waveguide.

[0075] In such exemplary embodiments, the EE and AE can be positioned and oriented relative to each other in the waveguide plane to optimize the deflection from the EE to the AE.

[0076] The EE and AE can be, for example, attached to an outside of the waveguide, integrated into the waveguide, etc.

[0077] All holograms in examples where the EE and / or the AE include holograms can include a volume hologram and / or a relief hologram, be a transmission or reflection hologram and / or be embedded in the pane or between two panes (e.g. laminated glass).

[0078] In another example, the imaging system can include a sensor, wherein the imaging system can have at least one AE configured to at least partially couple the deflected light to the sensor.

[0079] The sensor can be a suitable component directly matched to the imaging system, enabling digital recording of the image created by the imaging system. This can allow for digital post-processing and / or the merging of the light contributions collected and deflected by the various energy sources.

[0080] The sensor, at least one of which can comprise, for example, an image sensor (e.g., a CCD or CMOS sensor (complementary metal oxide semiconductor)) with an array of individually addressable sensor elements for capturing images of a sample, and optics (e.g., one or more lenses, an objective, mirrors or reflective surfaces, filters, and / or apertures) for directing and / or focusing light or radiation from one or more light or radiation sources into and out of the field of view onto the sensor. The superposition of identical and / or similar points of the images, based on the light coming from different EEs on the sensor, can thus be digitally processed and, if necessary, used to create the final image after image corrections have been made. For example, shifts, distortions, different scalings, etc., can be compensated for by such digital processing, so that a coherent overall image is obtained.An overall picture can be created.

[0081] The imaging system may, for example, still include a lens, whereby the lens may be configured to couple at least some of the light extracted from the at least one AE into the sensor.

[0082] A lens can compensate for aberrations in the image and thus improve image quality.

[0083] The function of the lens can also be at least partially integrated into at least one AE (Advanced Image Processor), for example, by the AE not only redirecting the light by changing its direction so that it is coupled out to the sensor, but also by the AE having a focusing and / or diverging function, so that the AE, alone or in combination with a lens, appropriately directs the light onto the sensor. The same can apply analogously to at least one of the EE (Extended Image Processor) in exemplary embodiments.

[0084] The AE can, for example, define an AE aperture, and the lens can have a lens aperture whose area can essentially correspond to the area of ​​the AE aperture.

[0085] Such a setting allows the lens aperture to be kept small.

[0086] The AE aperture can be defined, for example, as described herein with respect to the preferred embodiments, and essentially encompasses the area in which the AEs are attached to the waveguide. Generally, it is advantageous to find a compromise between sensor aperture size, waveguide thickness, EE and / or AE size, and FOV in order to optimize the imaging system, for example, with regard to the intended imaging, installation space requirements, etc.

[0087] The imaging system may further include, for example, an image processing means which may be configured to create an overall image at least partially based on the deflected light from the first field of view and the at least one second field of view, preferably so that a color error can be compensated.

[0088] In some embodiments, the image processing means may include a data processor and a storage device. The data processor in the deposition tool may count and / or measure the number of deposition steps and / or the deposition time. The storage device may store image data acquired by the imaging system, store correlations between acquisitions using different EEs, and / or access them, etc. In some implementations, the imaging system may include one or more computers containing one or more data processors configured to execute one or more programs containing a variety of instructions according to the principles described above, and / or be coupled to such computers. Each data processor may contain one or more processor cores, and each processor core may contain logic circuits for processing data.For example, a data processor can include an arithmetic and logical unit (ALU), a control unit, and various registers. Every data processor can contain a cache. Every data processor can contain a system-on-a-chip (SoC) that includes multiple processor cores, random-access memory, graphics processing units, one or more controllers, and one or more communication modules. Every data processor can contain millions or billions of transistors.

[0089] In one example of the present invention, the imaging system can comprise at least one holographic deflection element (UE) which can be configured to deflect the light deflected by the EE at least partially to the associated AE (and / or vice versa). Similarly, another aspect of the invention relates to an imaging system comprising: a waveguide, an EE, an UE, and an AE, wherein the UE is configured to deflect light deflected by the EE at least partially to the AE and / or to deflect light deflected by the AE at least partially to the EE.

[0090] The UE can, for example, be configured to deflect the light from the EE not essentially in the plane of the waveguide (e.g.), but essentially perpendicular to it, e.g., into a perpendicular part of the waveguide and / or into another perpendicular element and / or a corresponding free space. This concept is further explained here, for example, with reference to Figures 4a and 4b.

[0091] Another aspect of the present invention relates to a method for creating a composite image, comprising: capturing a first image with a first holographic EE configured to at least partially deflect light of at least a first wavelength from a first field of view of the first EE; capturing at least a second image with at least a second holographic EE spaced apart from the first EE, configured to deflect light of at least a second wavelength from at least a second field of view of the second EE, wherein the first and the at least one second field of view at least partially overlap; and creating a composite image at least partially based on the deflected light from the first field of view and the at least one second field of view.

[0092] In some examples, a method for creating a composite image may include the following steps: capturing, using a first sensor, a first image with a first holographic EE configured to deflect light of at least one wavelength from a first field of view of the first EE at least partially to the first sensor; capturing, using a second sensor, at least a second image with at least one second holographic EE spaced apart from the first EE, configured to deflect light of at least one wavelength from at least one second field of view of the second EE at least partially to the second sensor, wherein the first and the at least one second field of view at least partially overlap; and creating a composite image at least partially based on the deflected light from the first field of view and the at least one second field of view.

[0093] These methods can achieve the same advantages described herein with regard to the imaging system and / or a corresponding imaging system can be used to carry out the method.

[0094] Similarly, a third (and optionally further) image can be captured using a third (or further) EE, and / or a third (or further) sensor, etc., and combined into a complete image, for example as described herein.

[0095] It is also conceivable to implement embodiments in which the function of the various sensors described herein can be performed by a single sensor.

[0096] Another aspect of the invention relates to a computer program that includes instructions for carrying out the steps of the methods described herein.

[0097] A computer program can be written in any programming language, including compiled or interpreted languages, and it can be provided in any form, including as a standalone program or as a module, component, subroutine, or other unit suitable for use in a computer environment.

[0098] Another aspect of the invention may relate to an imaging system comprising: a waveguide, a sensor, a light source, a holographic EE, and a holographic AE, wherein the EE is configured to deflect light of at least a first wavelength from a field of view of the EE at least partially within the waveguide and to the AE, wherein the AE is configured to couple the deflected light at least partially out of the waveguide and to the sensor, wherein the AE is configured to deflect light emitted by the light source at least partially within the waveguide and to the EE, and wherein the EE is configured to couple the emitted light at least partially out of the waveguide and into the field of view.Another aspect of the invention relates to a method for producing an imaging system comprising the following steps: providing a waveguide; and generating a first holographic EE on the waveguide, wherein the first EE is configured to deflect light of at least one wavelength from a first viewing area of ​​the first EE at least partially within the waveguide; and generating at least one second EE on the waveguide, wherein the at least one second EE is configured to deflect light of at least one wavelength from at least one second viewing area of ​​the second EE at least partially within the waveguide. The first and the at least one second viewing area are at least partially superimposed on each other.

[0099] Essentially, an imaging system as described herein can be produced.

[0100] The method can, for example, further include generating at least one diffraction-based AE on the waveguide, preferably by means of holographic exposure, wherein the at least one AE can be configured to at least partially couple out of the waveguide light deflected by the at least two EE.

[0101] Such a method can provide an imaging system according to the invention, which can thus bring with it the advantages mentioned above.

[0102] Generating at least two diffraction-based EEs and / or at least one AE on the waveguide can, for example, involve direct generation at the final location of the EEs and / or AEs and / or separate generation of the EEs and / or AEs and placement of the EEs and / or AEs on the waveguide.

[0103] The data processing described herein, such as the creation of an overall image, can be performed using one or more computers, which may include one or more data processors for processing data, one or more storage devices for storing data, and / or one or more computer programs containing instructions that, when executed by the one or more computers, cause them to perform the processes. The one or more computers may include one or more input devices, such as a keyboard, mouse, touchpad, and / or speech input module, and one or more output devices, such as a display and / or a speaker.

[0104] In some embodiments, the one or more computers and / or data processors may comprise digital electronic circuits, computer hardware, firmware, software, or any combination of the above-mentioned elements. The features relating to data processing may be implemented in a computer program product tangibly embodied in an information carrier, such as a machine-readable storage device, for execution by a programmable processor; and process steps may be executed by a programmable processor that executes a program containing instructions for performing functions of the described implementations. Alternatively or additionally, the program instructions may be encoded on a propagated signal, which is an artificially generated signal, such as a signal from a computer.A machine-generated electrical, optical, or electromagnetic signal that is produced to encode information for transmission to a suitable receiving device for execution by a programmable processor.

[0105] The computer(s) can be configured, for example, to run a computer program and may include both general-purpose and specialized microprocessors and one or more processors of any type of digital computer. Generally, a processor receives instructions and data from a read-only memory area, a random-access memory area, or both. The elements of a computer system include one or more processors for executing instructions and one or more memory areas for storing instructions and data. Generally, a computer system also includes, or is operationally coupled to, one or more machine-readable storage media, such as hard disks, magnetic disks, solid-state drives, magneto-optical disks, or optical disks, to receive data from or to them, or both.Machine-readable storage media suitable for embodying computer program instructions and data include various forms of non-volatile memory, such as semiconductor storage devices (e.g., EPROM, EEPROM, flash memory devices, and solid-state drives); magnetic disks (e.g., internal hard disks or removable media); magneto-optical disks; and CD-ROM, DVD-ROM, and / or Blu-ray discs.

[0106] In some exemplary implementations, the processes described above can be implemented using software to run on one or more mobile computing devices, one or more local computing devices, and / or one or more remote computing devices (which may be, for example, cloud computing devices). For instance, the software forms procedures in one or more computer programs that run on one or more programmed or programmable computer systems, either in the mobile computing devices, local computing devices, or remote computing systems (which may have different architectures, such as...).distributed, client / server, grid or cloud systems), each comprising at least one processor, at least one data storage system (including volatile and non-volatile memory and / or storage elements), at least one wired or wireless input device or a wired or wireless port and at least one wired or wireless output device or a wireless port.

[0107] In some embodiments, the software can be provided on a medium such as CD-ROM, DVD-ROM, Blu-ray Disc, a solid-state drive, or a hard disk, which can be read by a general-purpose or specialized programmable computer or delivered over a network to the computer on which it is executed (encoded in a transmitted signal). The functions can be executed on a specialized computer or using specialized hardware, such as coprocessors. The software can be implemented in a distributed manner, with different parts of the computations specified by the software being performed by different computers. Each such computer program is preferably stored on or downloaded to a storage medium or device (e.g., solid-state storage or media, or magnetic or optical media) that...which can be read by a programmable computer for general or special purposes to configure and operate the computer when the storage medium or device is read by the computer system to perform the procedures described herein. The system according to the invention can also be considered a computer-readable storage medium configured with a computer program, wherein the storage medium so configured causes a computer system to operate in a specific and predefined manner to perform the functions described herein.

[0108] The embodiments of the present invention described herein, and the optional features and properties mentioned in this context, should also be understood as being disclosed in all combinations with one another. In particular, in the present case, the description of a feature belonging to an embodiment—unless expressly stated otherwise—should not be understood as meaning that the feature is essential or indispensable for the function of the embodiment.

[0109] The features and functions described herein can generally be implemented as components of processes, devices, or computer programs.

[0110] 4. Description of the figures

[0111] Fig. ta schematically shows a view of a mapping system with an input element and an output element in the xz-plane.

[0112] Fig. ib schematically shows a view of a mapping system with an input element and an output element in the xy-plane.

[0113] Fig. ic schematically shows a view of a imaging system with an input element and an output element in the yz-plane. Fig. id schematically shows a view of an imaging system with an input element, an output element, and a waveguide with a wedge-shaped cross-section in the xz-plane.

[0114] Fig. le shows a schematic view of an imaging system with an input coupling element, an output coupling element and a waveguide curved in the xz-plane.

[0115] Fig. 2 shows an exemplary imaging system according to the invention, comprising a first EE, a second EE and a third EE.

[0116] Fig. 3 shows an exemplary section of an imaging system comprising an EE, an AE, a sensor and a light source.

[0117] Fig. 4a shows a first exemplary imaging system comprising an EE, an AE, an UE and a sensor.

[0118] Fig. 4b shows a second exemplary imaging system comprising an EE, an AE, a UE and a sensor.

[0119] 5. Detailed description of preferred embodiments

[0120] The general principle will be explained using the following figures la - le.

[0121] Figures la - le relate to a mapping system 10 with only one EE 30 and serve to illustrate the underlying problem.

[0122] Fig. ta schematically shows a view of the imaging system 10 with the EE 30 and an output coupling element, AE, 40 in the xz-plane. The imaging system 10 further comprises a waveguide 20 with a cross-section in the xz-plane in the form of a rectangle elongated in the z-direction and a detection system 60, which may include, for example, a sensor and a lens. The EE 30 is located at the upper end of the waveguide 20 on the left side of the waveguide 20, and the AE 40 is located at the lower end of the waveguide 20 on the right side of the waveguide 20.

[0123] Waveguide 20.

[0124] The EE 30 has a vertical field of view, v-FOV. The light incident from the v-FOV is deflected by the EE 30 into the waveguide 20, as schematically illustrated by the black arrows. Within the waveguide, the deflected light reaches the AE 40 via total internal reflection. In other embodiments, the light can also reach the AE 40 with more, fewer, or even no reflections within the waveguide 20. The EE 30, the waveguide 20, and the AE 40 are matched in their respective shapes, dimensions, relative positions, and / or relative orientations such that the deflected light from the EE 30 reaches the AE 40 as efficiently as possible, from where the deflected light is at least partially coupled out to the detection system 60, as schematically illustrated by the black arrows.

[0125] The v-FOV encompasses an opening angle ct v , where ct v= o in the example of Fig. ala describes a light incidence perpendicular to the surface of the waveguide 20.

[0126] In principle, the deflection of light by the EE 30 and the AE 40 can depend on the angle of incidence of the incoming light, e.g., insofar as the deflection angle and / or the spectral distribution of the deflected light depends on the angle of incidence and / or only a part of the light reaches the AE 40.

[0127] Fig. ib schematically shows a cross-sectional view of the imaging system 10 from Fig. ta in the xy-plane, so that in particular the horizontal field of view, h-FOV, of the EE 10 can be represented. From Fig. ib, the horizontal coupling to the EE 30 and the horizontal coupling from the AE 40 to the detection system 60 are evident, while Fig. ta best represents the vertical components.

[0128] Fig. ic schematically shows a cross-sectional view of the imaging system 10 from Figs. 1a and 1b in the yz-plane. It can be seen that the EE 30 is elongated in one direction, in this example along the y-axis, and has a shorter length in the perpendicular direction, in this example along the z-axis, in the plane of the waveguide 20. The EE cross-section, in the form of an elongated rectangle, defines the region in which light incident on the EE 30 is at least partially deflected within the waveguide 20. Since the area of ​​the AE 40 in the plane of the waveguide 20 is smaller than that of the EE 30, all paths along which the light is deflected from the EE 30 to the AE 40 lie, in the projection in the yz-plane, within the trapezoidal region between the EE 30 and the AE 40.Light that passes at least partially outside this trapezoid does not come from the EE 30 and / or does not hit the AE 40 and therefore does not play a decisive role in the imaging of the imaging system 10.

[0129] Fig. id, for example, shows a view of an imaging system 10 with an EE 30, an AE 40, and a waveguide 20 with a wedge-shaped cross-section in the xz-plane. The two side faces of the waveguide 20, to which either the EE 30 or the AE 40 is attached, are not parallel to each other. The AE 40 couples the deflected light out to the detection system 60 as described herein.

[0130] Fig. 1 schematically shows a view of an imaging system 10 with an EE 30, an AE 40, and a waveguide 20 curved in the xz-plane. The exemplary waveguide 20 has a constant thickness and a curvature in the xz-plane. Additionally or alternatively, the waveguide 20 could also have a curvature in the xy- and / or yz-plane. The respective curvature could be uniform or non-uniform on different sections of the waveguide 20, up to and including completely irregular curvatures. The AE 40 couples the deflected light to the detection system 60 as described herein.

[0131] Neither the relative inclination of the two side surfaces of the waveguide 20 from Fig. id nor the curvature of the waveguide from Fig. le poses an obstacle to the functionality of the imaging system 10. The functionalities described herein can be transferred to the imaging system 10 from Figs. id and le, and the coupling to the respective detection system 60 takes place as described herein.

[0132] Imaging systems as described in Figs. 1a-1le are sometimes modified in the prior art such that several parallel, essentially identical holograms are used as EE and / or that RGB holograms are used as EE instead of simple monochromatic holograms. In such imaging systems, the problem of spectral

[0133] Angular dependence as described herein by way of example with reference to Fig. i.

[0134] Fig. 2 shows an exemplary imaging system io according to the invention, comprising a first EE 31, a second EE 32, and a third EE 33. The EE 31, 32, 33 are arranged parallel to each other and are substantially adjacent to each other along the longitudinal axis L. In the example shown in Fig. 2, each EE 31, 32, 33 is assigned a sensor 51, 52, 53, and a light source 61, 62, 63. In the example shown in Fig. 2, the light from the light source 61 is emitted via the EE 31 into the field of view of the EE 31, the light from the light source 62 is emitted via the EE 32 into the field of view of the EE 32, and the light from the light source 63 is emitted via the EE 33 into the field of view of the EE 33.In the other direction, the light deflected by EE 31 is deflected from the field of view of EE 31 to sensor 51 and detected by it, the light deflected by EE 32 is deflected from the field of view of EE 32 to sensor 52 and detected by it, and the light deflected by EE 33 is deflected from the field of view of EE 33 to sensor 53 and detected by it.

[0135] Each EE 31, 32, 33 can be assigned an AE (not shown) which couples the light deflected by the EE 31, 32, 33 to the respective sensor 51, 52, 53 and / or deflects the light emitted by the respective light source 61, 62, 63 to the respective EE 31, 32, 33 (e.g., via internal (total) reflection within the waveguide). How such an interaction of EE, AE, sensor, and light source could be realized is explained below with reference to Fig. 3:

[0136] Fig. 3 shows an exemplary section of an imaging system 10 comprising an EE 30, an AE 40, a sensor 60 and a light source 50. The EE 30 can represent the first or at least a second EE described herein, the AE 40 can represent the first or at least a second AE described herein, and the sensor 60 and the light source 50 can represent the respective associated components.

[0137] The solid arrows illustrate how light from the field of view is at least partially deflected by the EE 30 into the waveguide 20 and thus reaches the AE 40, which at least partially couples the deflected light to the sensor 60, enabling it to detect an image (e.g., of an object within the field of view). The dashed arrows illustrate how the light emitted by the light source 50 is directed onto the AE 40, at least partially deflected by it into the waveguide 20 and thus reaches the EE 30, which at least partially couples the deflected light out of the waveguide 20, so that the light from the light source 50 is at least partially emitted into the field of view.

[0138] Furthermore, other exemplary embodiments may have additional features that allow for more flexible placement of the sensor and / or the light source. In particular, placement at the edge of the waveguide may be preferred in many applications such as mobile phones, screens, computers, tablets, glasses, windows, etc. Figures 4a and 4b show exemplary approaches based on the use of a UE 70:

[0139] Fig. 4a shows a first exemplary imaging system 10 comprising an EE 30, an AE 40, a UE 70 and a sensor 60 and Fig. 4b shows a second exemplary imaging system comprising an EE 30, an AE 40, a UE 70 and a sensor 60.

[0140] In both cases, the EE 30 deflects light from the field of view (v-FOV) at least partially into the waveguide 20, where it reaches the UE 70 (in the example of Fig. 4a via total internal reflection and in the example of Fig. 4b without reflection via a direct path). In the examples of Figs. 4a and 4b, the UE 70 is attached to an edge, i.e., a surface perpendicular to the surface through which the light enters the waveguide. The waveguide 20 is L-shaped, so that in its profile, next to the surface through which the light enters the waveguide, it has a perpendicular projection at the edge of said surface. The UE 70 is configured to deflect the light to the AE 40, which is attached to this projection, so that the AE 40 is not located on the surface or the opposite side of the waveguide.This allows the AE 40, as well as the sensor to which the light incident on the AE 40 is at least partially coupled, to be concealed deeper within the device, which features the exemplary imaging system 10. In this way, the components to be concealed are less visible or even completely invisible to the user. The concept explained with reference to Figures 4a and 4b can be applied analogously to imaging systems with a light source.

Claims

August 6, 2025 Carl Zeiss Jena GmbH Z17432OWO ANE / Ris REQUIREMENTS 1. Imaging system (10) comprising: a waveguide (20); 5 a first holographic coupling element, EE (31), which is configured to at least partially enclose light of a first wavelength from a first viewing field of the first EE (31) within the waveguide (20) to deflect; and at least one second EE (32, 33), spaced apart from the first EE (31), which is configured to deflect light of at least a second wavelength from a second viewing area of ​​the second EE (32, 33) at least partially within the waveguide (20); wherein the first and the second viewing areas at least partially overlap. 5 2. Imaging system (10) according to claim 1, wherein the first EE (31) and the at least one second EE (32, 33) are arranged substantially parallel to each other.

3. Imaging system (10) according to claim 1 or 2, wherein the EE (31, 32, 33) each have a longitudinal axis, and wherein the EE (31, 32, 33) are preferably configured to deflect the incident light relative to them in a substantially uniform manner with respect to their respective longitudinal axis.

4. Imaging system (10) according to claim 3, wherein the first EE (31) and the at least one second EE (32, 33) are arranged substantially adjacent to each other along the longitudinal axis.

5. Imaging system (10) according to one of the preceding claims, wherein the first EE (31) comprises a VIS hologram, preferably a three- or more-color hologram, particularly preferably an RGB hologram; and / or wherein the second EE (32, 33) comprises an IR hologram and / or a UV hologram.

6. Imaging system (io) according to claim 5, wherein the VIS hologram, preferably the three- or multi-color hologram, particularly preferably the RGB hologram, is configured to deflect light from the visible spectral range, preferably between 380 nm and 780 nm; wherein the IR hologram is configured to deflect light from the IR spectral range, preferably between 780 nm and 1400 nm; and / or wherein the UV hologram is configured to deflect light from the UV spectral range, preferably between 315 nm and 380 nm.

7. Imaging system (10) according to one of the preceding claims, wherein the at least one first and the at least one second wavelength comprise an exposure wavelength with which the respective EE (31, 32, 33) was exposed and / or comprise a central wavelength which is deflected with maximum efficiency in a center of the respective field of view.

8. Imaging system (10) according to one of the preceding claims, further comprising at least one holographic coupling element, AE (41, 42, 43), wherein the at least one AE (41, 42, 43) is configured to at least partially couple the deflected light out of the waveguide (30).

9. Imaging system (10) according to claim 8, wherein the at least one AE (41, 42, 43) comprises a first AE (41) and / or at least a second AE (42, 43); wherein the first EE (31) is configured to deflect the light of the at least one first wavelength from the first field of view of the first EE (31) at least partially to the first AE (41); and / or wherein the second EE (32, 33) is configured to deflect the light of the at least one second wavelength from the second field of view of the second EE (32, 33) at least to the at least one second AE (42, 43).

10. Imaging system (10) according to one of claims 8 or 9 with at least two AE (41, 42, 43), wherein one EE (31, 32, 33) and one AE (41, 42, 43) form a pair.

11. Imaging system (io) according to claim io, wherein the AE (41, 42, 43) of a pair is arranged substantially parallel to the EE (31, 32, 33) of the pair.

12. Imaging system (10) according to one of claims 10 or 11, wherein the EE (31, 32, 33) and AE (41, 42, 43) of a pair are configured such that the beam path between EE (31, 32, 33) and AE (41, 42, 43) is substantially axially symmetric.

13. Imaging system (10) according to one of claims 8 - 12, wherein the EE (31, 32, 33) and the at least one AE (41, 42, 43) are arranged substantially axially symmetric about an axis of symmetry.

14. Imaging system (10) according to one of claims 8-13, wherein the at least one AE (41, 42, 43) has a smaller surface area than one of the EE (31, 32, 33)- 15. Imaging system (10) according to one of the preceding claims, further comprising at least one light source (51, 52, 53), wherein the at least one light source (51, 52, 53) is configured to emit light at least partially into the first and / or second field of view.

16. Imaging system according to claim 15, wherein the at least one light source (51, 52, 53) comprises a first light source (51) configured to emit light from the visible spectral range, preferably between 380 nm and 780 nm; and / or comprises at least a second light source (52, 53) configured to emit light from the IR spectral range, preferably between 780 nm and 1400 nm, and / or configured to emit light from the UV spectral range, preferably between 315 nm and 380 nm.

17. Imaging system (10) according to claim 15 or 16, referring back to any one of claims 8-14, wherein the at least one light source (51, 52, 53) is configured to is set up to apply light at least partially to at least one AE (41, 42, 43).

18. Imaging system (10) according to claim 17, wherein the at least one AE (41, 42, 43) is configured to deflect the light emitted by the at least one light source (51, 52, 53) at least partially within the waveguide (20) and / or to the first and / or second EE (31, 32, 33).

19. Imaging system (10) according to claim 17 or 18, wherein the first and / or second EE (31, 32, 33) is configured to at least partially couple out of the waveguide (20) emitted by the at least one light source (51, 52, 53).

20. Imaging system (10) according to one of the preceding claims, wherein the waveguide (20) has a first and a second surface opposite the first, which are separated from each other by a substantially constant layer thickness.

21. Imaging system (10) according to claim 20, referring back to any one of claims 8 - 19, wherein at least one of the EE (31, 32, 33) is substantially arranged on the first surface of the waveguide (20); and / or the at least one AE (41, 42, 43) is substantially arranged on the second surface of the waveguide (20).

22. Imaging system (10) according to one of the preceding claims, further comprising at least one sensor (60); wherein the imaging system (10) has at least one AE (41, 42, 43) which is configured to at least partially couple the deflected light to the at least one sensor (60).

23. Imaging system (10) according to claim 22, further comprising at least one lens, wherein the lens is configured to project from at least one AE (41, 4 2 , 43) coupled out light at least partially into the at least one sensor (60).

24. Imaging system (10) according to one of the preceding claims, further comprising an image processing means which is configured to create an overall image at least partially based on the deflected light from the first field of view and the at least one second field of view, preferably such that a color error is compensated.

25. Methods for creating a comprehensive overview: Recording, by means of a first sensor (61), a first image with a first holographic coupling element, EE (31), which is configured to deflect light of at least a first wavelength from a first viewing field of the first EE (31) at least partially to the first sensor (61); Recording, by means of a second sensor (62, 63), at least a second image with at least one second holographic EE (32, 33) spaced apart from the first EE (31), which is configured to deflect light of at least a second wavelength from at least a second field of view of the second EE (32, 33) at least partially to the second sensor (62, 63); wherein the first and the at least one second field of view at least partially overlap each other; and Creating an overall image at least partially based on the deflected light from the first field of view and at least one second field of view.

26. Method for producing an imaging system (10) comprising the following steps: Providing a waveguide (20); and Generating a first holographic coupling element, EE, (31) on the waveguide (20), wherein the first EE (31) is configured to deflect light of at least a first wavelength from a first viewing field of the first EE (31) at least partially within the waveguide (20); and generating at least one second EE (32, 33) spaced apart from the first EE (31) on the waveguide (20), wherein the at least one second EE (32, 33) is configured to is arranged to deflect light of at least a second wavelength from at least a second viewing field of the second EE (32, 33) at least partially within the waveguide (20); wherein the first and the at least one second viewing field at least partially overlap each other.

27. Method according to claim 26, further comprising: Generating at least one holographic coupling element, AE (41, 42, 43), on the waveguide (20), preferably by means of holographic exposure; wherein the at least one AE (41, 42, 43) is configured to at least partially couple light deflected from the waveguide (20) by the at least two EE (31, 32, 33).

Images