Mounting system for an image acquisition device on an optical observation device, and optical observation device

Abstract

A mounting system (30) for an image acquisition device (31), in particular a smartphone (32), on an optical observation device (1, 2, 70) is described. The mounting system (30) has a retaining ring (34) which, at least in the intended mounting state, is arranged on an eyepiece tube (16) of the observation device (1, 2, 70) on a side of an eyecup (20) of the eyepiece tube (16) facing away from the viewing end of the eyepiece tube (16), wherein the retaining ring (34) comprises or is made of ferro- or ferrimagnetic material. Furthermore, the mounting system (30) has a mounting ring (40) which is configured for magnetic coupling with the retaining ring (34) and supports the image acquisition device (31, 32) in the intended operating state. The fastening ring (40) surrounds the eyecup (20) on the outside when in its intended operating state.

Description

[0001] The invention relates to a mounting system for an image acquisition device on an optical observation device. Furthermore, the invention also relates to such an optical observation device, for example a spotting scope or binoculars.

[0002] Optical observation devices are used in various fields and in different forms. For nature observation, binoculars (usually designed for binocular viewing with two parallel optical paths) and spotting scopes (designed for monocular viewing, similar to a telescope) are most commonly used, particularly depending on the "professional" nature of the observation and the required mobility. Spotting scopes often have higher magnification. Target shooters usually use spotting scopes mounted on a tripod, fixed to a target, for recording and / or evaluating hits, while hunters often use binoculars due to their greater flexibility.

[0003] Particularly in the field of nature observation, recording (and especially saving) the currently viewed image is also of interest, for example, for documentation purposes or for the subsequent classification of an observed animal species, or similar purposes. To avoid having to carry a camera with a correspondingly large and often very expensive (telephoto) lens in addition to at least one of the aforementioned observation devices, so-called "digiscoping" has become popular. This involves using an image capture device, especially a digital camera—usually a smartphone camera—to capture an image of the view through the eyepiece of the observation device. For the most precise alignment of the image capture device with the eyepiece, mounting devices are already available that include an adapter on the eyepiece side for holding the image capture device.For example, such an adapter is known from US 2023 / 0359107 A1.

[0004] US Patent 2023 / 0221625A1 describes a mounting system for connecting a mobile computing device to an optical device. The optical device can be, among other things, a riflescope, binoculars, or similar. The mounting system uses mounting devices and a bracket with openings that allow a mobile computing device to be coupled to the optical device in such a way that the mounting system establishes a line of sight between a camera on the mobile computing device and the lens of the optical device. This allows the camera on the mobile computing device to capture images and videos using the powerful zoom function of the optical device and the ease of use of the mobile computing device.

[0005] US 2022 / 0 397 811 A1 describes a device comprising a tab with a tab shaft having a first side, a second side, and an opening; one or more magnets arranged within the tab shaft; and a means for connecting the first side to a device such that a camera lens of the device is aligned with the tab opening. The device further comprises an adapter with an adapter body having a first side, a second side, and an opening; one or more magnets arranged within the adapter body, the one or more adapter magnets being aligned with the one or more tab magnets to magnetically attach the tab to the adapter; and an adapter side wall projecting along an axis perpendicular to an edge of the first side to attach the adapter to an eyepiece of an optical instrument with a lens.

[0006] US 2022 / 0 299 748 A1 also describes a device for attaching a smartphone to an observation device. This device comprises a body positioned to engage with an optical sight. The body includes a first section and a second section that is movable relative to the first section between a first position and a second position. The first section includes a side wall defining an opening with a central axis, and the second section includes a magnet. In the first position, the second section is positioned to cover the opening, and the radial distance from the central axis to the side wall is greater than the radial distance from the central axis to the magnet.

[0007] The term (optical) observation device includes not only the aforementioned binoculars and spotting scopes, but also, in principle, rifle scopes and microscopes, for which such image capture as described above may be of interest.

[0008] The invention is based on the objective of further improving known holding devices.

[0009] This problem is solved according to the invention by a fastening system with the features of claim 1. Furthermore, this problem is solved according to the invention by an optical observation device with the features of claim 12. Further advantageous and partly inventive embodiments and developments of the invention are set out in the dependent claims and the following description.

[0010] The mounting system according to the invention is designed and intended for attaching an image acquisition device to an optical observation device. For this purpose, the mounting system includes a retaining ring. This retaining ring is arranged, at least in one intended mounting or operating state (of the mounting system), on an eyepiece tube of the observation device, specifically on a side of an eyecup of the eyepiece tube facing away from the viewing end of the eyepiece tube. Furthermore, the retaining ring comprises or is made of ferromagnetic or ferrimagnetic material. The mounting system also includes a mounting ring that is designed for magnetic coupling with the retaining ring and supports the image acquisition device in the intended operating state. In particular, the image acquisition device is connected to the mounting ring in the intended operating state.Furthermore, in its intended state of use, the fastening ring surrounds the eyecup on the outside, preferably at least over part of its extension from the viewing end to an opposite (image-side) end of the eyecup, and is magnetically coupled to the retaining ring.

[0011] According to the invention, the eyecup of the eyepiece tube preferably remains unchanged, i.e., it is not replaced by the retaining ring or covered by it on the eye or viewing side. This allows the original function of the eyecup—to provide comfortable contact with the eyepiece tube for the user of the observation device—to be maintained. Preferably, the eyecup is made of a plastic, in particular an elastomer (rubber or the like), so that the eyecup is soft and pliable and can provide cushioning, while also preventing skin contact with cold metal, especially at low temperatures.

[0012] The term "viewing end" here and in the following refers in particular to the end of the eyepiece tube into which a user of the observation device looks for observation.

[0013] The magnetic coupling between the retaining and fastening ring advantageously allows the connection to be formed or released easily, without tools and also quickly.

[0014] Preferably, the image capture device is a digital camera, preferably a smartphone with such a digital camera integrated into it.

[0015] The retaining ring is advantageously made of ferromagnetic or ferrimagnetic steel, particularly preferably stainless steel. However, the retaining ring can also be made of a plastic filled with such a magnetic material. In this case, the retaining ring preferably comprises a permanent magnetic material, e.g., neodymium-iron-YAG or comparable materials, especially those based on neodymium (commonly referred to simply as "neodymium magnets").

[0016] The magnetic coupling between the retaining ring and the mounting ring has the advantage of being simple, particularly straightforward and quick to create, but also easy to detach. Especially in the case of smartphones, which are usually flat and relatively lightweight, magnetic coupling with conventional magnetic materials is generally sufficiently stable.

[0017] According to a suitable design, the mounting ring has or can be connected to retaining means for holding the image capture device and / or a case for the image capture device. For example, these retaining means serve for magnetic mounting. Particularly in the case of smartphones, these now often have means for magnetic coupling with accessories (e.g., a charging pad, wallets, cases, and the like). Preferably, the mounting ring is therefore designed to establish a corresponding magnetic connection with such a smartphone and / or its case. Alternatively, the mounting ring can also be equipped with, for example, a suction cup, a clamp, a case, or the like for holding or receiving the smartphone.

[0018] According to a suitable embodiment, the mounting ring, in particular as a holding element, has a retaining plate extending transversely to an annular axis (especially the axis of symmetry) of the mounting ring, on which the image capture device and / or the case for the image capture device rests in the intended operating state. This retaining plate incorporates, for example, at least one retaining magnet for coupling with the image capture device (especially the smartphone) or its case. Optionally, the mounting ring can be designed for a specific model of the image capture device, especially a smartphone, so that the mounting system or at least the mounting ring can be purchased specifically for a smartphone model. Alternatively, the mounting ring, especially with the retaining plate, can also be suitable for several smartphone models. For this purpose, the holding elements, e.g.,The mounting plate and clamping device are adjustable to fit different smartphones.

[0019] Alternatively or in addition to magnetic holders, the mounting plate can also be designed as a kind of case for the smartphone, allowing the latter to be attached to the mounting plate using a form-fit or force-fit connection (i.e., not magnetically or not solely magnetically). For example, the mounting plate can have laterally protruding edges into which the smartphone is clipped, or the mounting plate can be the base plate of a housing that encloses the smartphone in its intended assembly state. Alternatively, the mounting plate can also have spring-loaded clamping jaws for the smartphone, allowing smartphones of different sizes to be secured between the jaws. The mounting plate can also have a suction cup or similar device for holding the smartphone. In the latter case, manual alignment of the smartphone on the mounting ring is preferred.

[0020] In a suitable design, the retaining ring, when in its intended operating state, at least partially surrounds or covers the retaining ring on its outer side. This allows for a centering effect between the retaining ring and the retaining ring.

[0021] Preferably, the mounting ring is designed to hold the image acquisition device centered with its optical axis relative to an optical axis of the observation device. For this purpose, the mounting ring—in addition to the optional magnetic mounting elements for the observation device—also includes means for centering the optical axes, such as mechanical positioning aids, which are expediently adapted to the specific smartphone model. For example, a recess is provided for one or more protruding camera lenses of the smartphone, enabling positioning of the camera lens. If the mounting elements are designed as a case or housing for the smartphone, the corresponding alignment is achieved directly when the smartphone is attached.

[0022] The retaining ring is preferably also designed to be arranged, or be arrangable, on the observation device with a ring axis (also axis of symmetry) centered with respect to the optical axis of the observation device, in particular its eyepiece tube. This is advantageously and simply achieved, for example, by designing the retaining ring for clamping onto an annular (or also sleeve- or tube-shaped) element of the eyepiece tube.

[0023] In particular, to enable a particularly simple coaxial alignment of the mounting ring to the retaining ring and thus of the respective optical axes of the image acquisition device and the observation device, especially its eyepiece tube to each other, according to an advantageous embodiment the retaining ring and / or the mounting ring have means for centering the mounting ring or the retaining ring (especially relative to each other).

[0024] According to a preferred embodiment, these centering means are formed by an outer chamfer on the retaining ring and / or an inner chamfer on the mounting ring. Preferably, this chamfer is larger than chamfers typically used for "softening" edges (i.e., a chamfered surface running obliquely to the axis of the retaining ring has a width – measured perpendicular to the circumferential direction – of, in particular, more than 0.5 mm). In the case of two chamfers (i.e., one on the retaining ring and one on the mounting ring), the inner diameter of the mounting ring is, in particular, smaller than the outer diameter of the retaining ring. This allows the two oblique chamfered surfaces to abut each other, thus facilitating centering. However, it is also possible for only the retaining ring to have the outer chamfer or only the mounting ring to have the inner chamfer.In this case, too, it is advantageous for the inner diameter of the retaining ring to be smaller than the outer diameter of the locating ring. This allows the unchamfered edge—or the edge that is only chamfered, slightly chamfered, or rounded, as is technically common—to be aligned and centered against the chamfer of the other ring. Additionally or alternatively, the centering means can also be provided by corresponding shoulders on the locating ring and the retaining ring, so that, in the intended operating state, the retaining ring and the locating ring are joined in a kind of lap joint.

[0025] According to another advantageous embodiment, the retaining ring (as mentioned above) is designed for clamping to the eyepiece tube. Preferably, the retaining ring is interrupted by a slot. This slot is optionally bridged by a clamping screw. Thus, by actuating the clamping screw, the slot can be closed, and the retaining ring can be clamped to the eyepiece tube. Alternatively, a spring can bridge the slot and exert a clamping force in the closing direction. To mount the retaining ring, it is slightly (and elastically) bent open against this (spring) clamping force, slid over the eyecup, and clamped onto the eyepiece tube, for example, an exposed sleeve- or tube-like element of the eyepiece tube.

[0026] According to an alternative embodiment, the retaining ring is integrated into the eyepiece tube. Preferably, the retaining ring forms a sleeve- or tube-like element of the eyepiece tube that is exposed to the surrounding environment (especially as mentioned above). Such a sleeve- or tube-like element forms, for example, a "design ring" (also: "brand ring"), i.e., a ring on which the manufacturer's brand, a type designation, or the like is affixed, or which has a manufacturer-specific design. Such a design ring usually has no function relevant to the optical imaging; that is, it does not serve to adjust, for example, the diopter value, the zoom setting, or the like.

[0027] According to an advantageous embodiment, the retaining ring, particularly in the case of the version integrated with the eyepiece tube, extends radially beyond the eyecup. This is especially advantageous for the centering of the retaining ring described above.

[0028] Preferably, the retaining ring and, in particular, the fastening ring are designed such that their magnetic coupling does not prescribe a specific rotational alignment relative to each other. Specifically, the retaining ring and the fastening ring are free of any complementary means for a specific rotational alignment of the two relative to each other. In other words, the retaining ring and the fastening ring are designed for free rotational alignment relative to each other. For this purpose, surfaces of the retaining ring and the fastening ring that bear against each other in the intended coupling state (e.g., the surfaces of the chamfers described above) are advantageously smooth, i.e., essentially rotationally symmetrical (optionally apart from the slot advantageously provided in the retaining ring for clamping).This allows the image capture device to be easily mounted on the observation device in any desired orientation, particularly around the optical axis of the eyepiece tube. This is advantageous, for example, with binoculars whose respective optical axes can be moved towards or away from each other using a hinge mechanism to adjust for different interpupillary distances. However, this changes the angle relative to one axis of the hinge around which the optical axes are pivoted. Free rotation is advantageous to compensate for this.

[0029] Preferably, in a further development of the above embodiment, the retaining ring and / or the fastening ring are designed such that free rotation is at least inhibited when the magnetic coupling between the retaining ring and the fastening ring is as intended. This is intended to prevent unintentional adjustment. For example, this is achieved by matching the ferro- or ferrimagnetic material of the retaining ring and the material of the fastening ring in such a way as to produce a particularly high magnetic holding force, which in turn increases the frictional force between the retaining ring and the fastening ring, particularly to such an extent that unintentional rotation of the fastening ring relative to the retaining ring is unlikely. Additionally or alternatively, the retaining ring and / or the fastening ring can also be provided with a friction-enhancing coating, e.g., a plastic, preferably an elastomer.In this case, for example, a rotational alignment is set by pulling the retaining ring at least slightly away from the retaining ring, setting the desired rotational alignment, and then placing the retaining ring (back) onto the retaining ring.

[0030] According to another advantageous embodiment, the retaining ring and / or the mounting ring are designed to position the image capture device, in particular the camera (especially its entrance lens) of the smartphone, within a predetermined distance range to an entry-side (or exit-side) lens of the eyepiece tube. This distance range defines, in particular, an upper and a lower limit of distance values, which are arranged as a tolerance around an at least theoretical ideal distance value. Advantageously, this tolerance can even be approximately 6 mm before and after the theoretical ideal distance value, so that in this case, even positioning an entrance lens of the image capture device (especially the smartphone) within a distance range of 12 mm around the ideal distance value to a camera can produce an image with sufficient image quality, e.g.with at least subjectively high sharpness, a sharply defined edge, without shading or the like. The ideal distance between the terminal lens (i.e., located at the viewing end) of the eyepiece tube and the entrance lens of the image acquisition device can be, for example, 18 mm, but may depend on the optical design of the observation device. For this "distance specification," the mounting ring is preferably designed with a correspondingly predetermined axial length. This length can advantageously be specifically tailored to an observation device or a series (model range) of observation devices.

[0031] According to an optional embodiment, the retaining ring can also be in the form of a film containing the ferro- or ferrimagnetic material. This film can – as an alternative to the clamping of the retaining ring described above – also be glued to the sleeve- or tube-shaped element of the eyepiece tube.

[0032] The optical observation device according to the invention has the eyepiece tube described above, which in turn has the eyecup and the retaining ring for the fastening system of the type described above, in particular the retaining ring integrated into the eyepiece tube.

[0033] The observation device therefore exhibits, in particular, the features and advantages described in connection with the corresponding design of the fastening system.

[0034] The optical observation device is formed, for example, by binoculars or a spotting scope, optionally also by a rifle scope, or even by a microscope.

[0035] The conjunction “and / or” is to be understood here and in the following in particular as meaning that the features linked by means of this conjunction can be formed both jointly and as alternatives to each other.

[0036] Exemplary embodiments of the invention are explained in more detail below with reference to a drawing. The drawing schematically and exemplarily shows: Fig. 1 in an exploded view an observation device with a mounting system for an image acquisition device, Fig. 2 a part of the fastening system, Fig. 3. In a top view, the observation device with the mounting system in its intended operating state, and Fig. Figure 4 shows an alternative embodiment of the observation device and the fastening system in a side view.

[0037] Corresponding parts in all figures are always marked with the same reference symbols.

[0038] In Fig. Figure 1 schematically depicts a portable optical observation device 1 in the form of (binocular) binoculars 2. The binoculars 2 have an optical group for each eye (not shown in detail), formed by a number of optical elements distributed along an optical path. In this embodiment, the optical elements are formed by several lenses made of optical glass. However, at least one prism and / or at least one mirror can also be used as optical elements. A housing tube 10 encloses each optical group around the optical path and protects the optical elements from dirt and mechanical damage. The optical path can be straight or angled and generally describes a beam path from an entrance aperture 12 to an exit aperture 14. The latter is located at the "viewing end" of the housing tube 10.The housing tube 10 is formed here by an eyepiece tube 16 (also called eyepiece for short).

[0039] The eyepiece tube 16 has an associated lens group (not shown), a housing ring, referred to here as the "design ring 18," and an eyecup 20. In the present embodiment, the design ring 18 is made of steel, in particular stainless steel, and has an engraving or coating with a type designation of the observation device 1 and optionally also a manufacturer's mark (brand) (not shown). The eyecup 20 is made of an elastomer and is fitted over a support ring of the eyepiece tube 16 (not shown). The design ring 18 and the support ring can optionally be formed as a single unit, thus forming the actual tube of the eyepiece tube 16. Alternatively, the design ring 18 and the support ring can also be connected to each other, e.g., screwed together, or adjustable relative to each other to accommodate a user's visual impairment, in particular by telescopic movement.The eyecup 20 is preferably interchangeable and thus removable from the carrier ring. Optionally, the eyepiece tube 16 can also be designed to be interchangeable in order to adapt the observation device 1 to a user's visual impairment or special user requirements. The lens group of the eyepiece tube 16 is arranged along an optical axis 22 of the eyepiece tube 16.

[0040] To enable not only live observation but also the recording of images or videos of an observed object—without having to carry a camera with a powerful telephoto lens—a mounting system 30 is provided. This mounting system 30 serves to attach an image capture device 31—here a smartphone 32 with an integrated (digital) camera—to the observation device 1 in such a way that its camera can capture the image visible through the eyepiece tube 16.

[0041] The fastening system 30 includes a retaining ring 34. In the present embodiment, this retaining ring is designed for clamping onto the design ring 18. For this purpose, the inner diameter of the retaining ring 34 is slightly larger than the outer diameter of the design ring 18. The retaining ring 34 is also interrupted by a slot 36. This slot 36 is bridged by a (tensioning) screw 38 screwed into the retaining ring 34, allowing the slot 36 to be reduced by means of the screw 38. This enables the retaining ring 34 to be clamped onto the design ring 18. Optionally, the screw 38 can serve only to close the slot 36, so that the slot 36 "opens" when the screw 38 is loosened by elastic return. Alternatively, the screw 38 can also serve—specifically, by means of threads arranged on both sides of the slot 36—to actively open the slot 36.The retaining ring 34 is also made of ferromagnetic or ferrimagnetic material, in particular steel.

[0042] The retaining ring 34 is relatively narrow, so that when clamped onto the outer surface of the design ring 18, it does not protrude beyond the eyecup 20 towards the exit opening 14; specifically, it does not cover the outer surface of the eyecup 20 (but merely rests on the design ring 18). The retaining ring 34 is thus positioned in its intended mounting position facing the eyecup 20 (i.e., away from the viewing end). This allows the retaining ring 34 to remain mounted on the design ring 18 even when the smartphone 32 is not in use. The function of the eyecup 20 – to ensure comfortable contact with the face, particularly the area around the user's eye – is therefore not affected by the retaining ring 34.

[0043] The fastening system 30 further comprises a device designated as a fastening ring 40. In the present embodiment, this device has a sleeve 42 as its actual "ring" and a retaining plate 44 arranged on the sleeve 42. The fastening ring 40, specifically the sleeve 42, is designed for magnetic coupling with the retaining ring 34 and therefore comprises magnetic, specifically permanent magnetic, material. For example, a (solid) neodymium magnet, e.g., in ring form, is integrated into the sleeve 42. Alternatively, the sleeve 42 is injection-molded from a plastic filled with permanent magnetic material.

[0044] The retaining plate 44 extends radially to an axis (axis of symmetry, central axis, axis of rotation; here aligned congruently with the optical axis 22) of the sleeve 42 and serves as a support surface for the smartphone 32. Fig. Figure 2 schematically illustrates how the mounting ring 40 and the smartphone 32 are arranged relative to each other as intended. The mounting plate 44 has a holding magnet 50 which, in the intended coupled state with the smartphone 32, interacts with a corresponding magnet integrated into the smartphone 32 to attach the smartphone 32 to the mounting plate 44.

[0045] The mounting plate 44 has a receiving opening 52, which is designed such that a lens 54 of the camera of the smartphone 32 is aligned concentrically with the axis of the sleeve 42. For example, the receiving opening 52 is designed to be ring-shaped and complementary to a camera protrusion 56 located on the rear of the smartphone 32.

[0046] In its intended operating condition, as shown in Fig. In the mounting system 30, the retaining ring 34 is clamped to the design ring 18 (the design ring 18 is thereby concealed and no longer visible), the smartphone 32 is held on the mounting ring 40, and the mounting ring 40 is magnetically coupled to the retaining ring 34, specifically by sliding it over the eyecup 20 of the eyepiece tube 16 and striking it against the retaining ring 34. To ensure that the axis of the sleeve 42, and thus also the lens 54 of the smartphone 32's camera, can be easily aligned with the optical axis 22 of the eyepiece tube 16, the retaining ring 34 has a chamfer 60 (see figure 3). Fig. 1) The sleeve 42 has a corresponding chamfer 62 on its inner side. These two chamfers 60 and 62, particularly in conjunction with the magnetic attraction between the sleeve 42 and the retaining ring 42, ensure that the sleeve 42 is centered relative to the retaining ring 34, so that the respective axes coincide with the optical axis 22, at least to a sufficient approximation. The two chamfers 60 and 62 thus serve as means for centering the retaining ring 34 and the mounting ring 40.

[0047] In Fig.Figure 4 shows an alternative embodiment. The observation device 1 is represented here by a spotting scope 70. The spotting scope 70 has fundamentally comparable elements to the binoculars 2, but is designed as a monocular. That is, the spotting scope 70 has only one housing tube 10, which encloses a corresponding optical group, and only one eyepiece tube 16. In this embodiment, the light path is angled at the end, i.e., before the viewing end 14. However, the spotting scope 70 can also have a straight light path. In this embodiment, the retaining ring 34 of the mounting system 30 is not designed as a separate component, but is integrated into the objective tube 16 and specifically forms a component with the design ring 18. Therefore, the design ring 18 is made of ferro- or ferrimagnetic steel and has the chamfer 60.Furthermore, the design ring 18 extends radially beyond the eyecup 20 so that the sleeve 42, with its chamfer 62, can rest on the design ring 18 or retaining ring 34. Otherwise, the components and functional features correspond to those described above.

[0048] To allow the camera to be freely rotated, at least the surfaces where the retaining ring 34 and the sleeve 42 abut each other are rotationally symmetrical. Specifically, the surfaces of the chamfers 60 and 62 are rotationally symmetrical, and in particular, macroscopically smooth, meaning they lack any waves, cams, grooves, or similar features oriented perpendicular to the circumferential direction. This allows these surfaces to slide relatively easily against each other. To increase friction and thus at least inhibit unintentional rotation, the chamfer 60 and / or 62 can, for example, be coated with an elastomer.

[0049] Due to the magnetic coupling described above between the mounting ring 40 and the holder ring 34, the mounting ring 40 and thus also the smartphone 32 can be removed or reattached to the holder ring 34 quickly and easily, especially without tools.

[0050] In the event that the eyecup 20 is adjustable relative to the design ring 18 along the optical axis 22, it should expediently be set to a minimum extension length for mounting the smartphone 32 by means of the mounting ring 40 on the retaining ring 34.

[0051] The subject matter of the invention is not limited to the embodiments described above. Rather, further embodiments of the invention can be derived by a person skilled in the art from the foregoing description. In particular, the individual features of the invention and their various configurations described with reference to the different embodiments can also be combined with one another in other ways. Reference symbol list 1 observation device 2 binoculars 10 Housing tube 12 Entrance opening 14 Exit opening 16 Eyepiece tube 18 Design ring 20 Eyecup 22 axle 30 fastening system 31 Image capture device 32 Smartphone 34 retaining ring 36 slots 38 screw 40 fastening rings 42 Sleeve 44 Mounting plate 50 holding magnets 52 Intake opening 54 lens 56 Camera Survey 60 phase 62nd phase 70 spotting scope 72 Nut

Claims

[1] Mounting system (30) for an image capture device (31), in particular a smartphone (32), on an optical observation device (1, 2, 70), comprising - a retaining ring (34) which, at least in the intended state of use, is arranged on an eyepiece tube (16) of the observation device (1, 2, 70) on a side of an eyecup (20) of the eyepiece tube (16) facing away from a viewing end of the eyepiece tube (16), wherein the retaining ring (34) has ferro- or ferrimagnetic material or is formed from such material, - a mounting ring (40) which is designed for magnetic coupling with the retaining ring (34) and which, in its intended state of use, carries the image acquisition device (31, 32), wherein the mounting ring (40), in its intended state of use, surrounds the eye cup (20) on the outside and is magnetically coupled to the retaining ring (34). [2] Fastening system (30) according to claim 1, wherein the fastening ring (40) has holding means for holding the image capture device (31, 32) and / or a cover for the image capture device (31, 32). [3] Fastening system (30) according to claim 1 or 2, wherein the fastening ring (40) has a retaining plate (44) extending transversely to an annular axis of the fastening ring (40), on which the image capture device (31, 32) and / or the housing for the image capture device (31, 32) rests in the intended operating state. [4] Fastening system (30) according to one of claims 1 to 3, wherein the fastening ring (40) in the intended operating state at least partially surrounds the retaining ring (34) on the outside. [5] Fastening system (30) according to claim 4, wherein the retaining ring (34) and / or the fastening ring (40) have means for centering the fastening ring (40) or the retaining ring (34). [6] Fastening system (30) according to claim 5, wherein the means for centering are formed by an outer chamfer (60) on the retaining ring (34) and / or an inner chamfer (62) on the fastening ring (40). [7] Fastening system (30) according to one of claims 1 to 6, wherein the retaining ring (34) is designed to clamp the eyepiece tube (16). [8] Fastening system (30) according to one of claims 1 to 6, wherein the retaining ring (34) is integrally formed with the eyepiece tube (16). [9] Fastening system (30) according to claim 8, wherein the retaining ring (34) extends radially beyond the eye cup (20). [10] Fastening system (30) according to any one of claims 1 to 9, wherein the retaining ring (34) and the fastening ring (40) are arranged for free rotational alignment with each other. [11] Mounting system (30) according to one of claims 1 to 10, wherein the retaining ring (34) and / or the mounting ring (40) are configured to position the image acquisition device (31, 32) within a predetermined distance range to a viewing-side lens of the eyepiece tube (16). [12] Optical observation device (1, 2, 70) with an eyepiece tube (16) which in turn has an eyecup (20) and a retaining ring (34) for a fastening system (30) according to one of claims 1 to 11.

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