Method and device for operating smart glasses, and smart glasses

Abstract

The invention relates to a method for operating smart glasses (100), wherein the smart glasses (100) have an spectacle lens (102) with a hologram element (104) and a temple (106) with a sensor unit (108), wherein the sensor unit (108) has a laser feedback interferometry sensor (110), wherein the method comprises the steps of: emitting modulated light using the sensor unit (108), the modulated light being directed onto an eye in a beam path via the hologram element (104); receiving reflected light using the sensor unit (108), the reflected light comprising light reflected via the beam path in response to the modulated light; analysing the reflected light using the sensor unit (108) in order to determine the distance between the sensor unit (108) and an optical device in the beam path; and determining at least one operating parameter for operating the smart glasses (100) using the determined distance.

Description

[0001] Description

[0002] title

[0003] Method and device for operating data glasses and data glasses

[0004] State of the art

[0005] The invention relates to a method and a device for operating data glasses, as well as to data glasses according to the preamble of the independent claims. The present invention also relates to a computer program.

[0006] One expected future trend is the wearing of data glasses that can overlay virtual image information into a user's field of vision. While some data glasses are opaque, for example, and thus block out the surrounding environment, other concepts pursue the approach of overlaying virtual image content with the surrounding environment. The overlaying of virtual image content with the perceived environment is referred to as augmented reality. One application, for example, is the overlaying of information during professional activities. For example, a mechanic could see a technical drawing, or the data glasses could color-code certain areas of a machine. However, the concept also has applications in computer games and other leisure activities.

[0007] Disclosure of the invention

[0008] Against this background, the approach presented here presents a method for operating smart glasses, a control device that uses this method, and finally a corresponding computer program and smart glasses according to the main claims. The measures listed in the dependent claims enable advantageous refinements and improvements of the device specified in the independent claim.

[0009] The approach presented here can create a way to detect, for example, bends or distortions, particularly those caused by damage to the frame of the smart glasses. This allows users to continue to receive the desired information as accurately as possible.

[0010] A method for operating data glasses is presented, wherein the data glasses have a spectacle lens with a hologram element and a spectacle temple with a sensor unit. The sensor unit has a laser feedback interferometry sensor. The method comprises a step of outputting modulated light using the sensor unit, wherein the modulated light is directed onto an eye in a beam path via the hologram element. The method also comprises a step of receiving reflected light using the sensor unit, wherein the reflected light comprises light reflected via the beam path in response to the modulated light. In an evaluation step, the reflected light is evaluated using the sensor unit to determine a distance between the sensor unit and an optical device in the beam path.The method further comprises a step of determining at least one operating parameter for operating the data glasses using the determined distance.

[0011] The method can advantageously be carried out for and in a pair of smart glasses. The smart glasses can, for example, be designed to overlay virtual image content with the perceived environment.

[0012] Advantageously, the spectacle lens, which can be designed, for example, as a disc-like and transparent element, can also have a transparent hologram element, referred to as an HOE (holographic optical element). The HOE can advantageously be designed as a film-like layer. HOEs can fulfill different optical functions, such as the function of a lens, a mirror, or a prism. Furthermore, the HOE can be color-selective and, additionally or alternatively, angle-selective. In addition to the hologram element, the data glasses can also have further optical devices, such as projection optics. The sensor unit can be implemented, for example, as a projection device and comprise at least one light source and one sensor. The light source can be implemented, for example, as an RGB light source, as a laser, or RGB laser.Furthermore, the light can be directed to the eye of a wearer of the data glasses so that they can see a corresponding image or corresponding information. The laser feedback interferometry (LFI) sensor of the sensor unit can advantageously detect and analyze the light reflected by the eye. More precisely, the reflected light can travel the same path in the opposite direction as the modulated light emitted by the sensor unit during the emitting step. A distance between the sensor unit and the HOE, the spectacle lens, a projection lens, or another optical device in the beam path to the eye can be determined. Advantageously, the method can be used to infer a temple position in relation to the spectacle lens based on the distance between the two.Advantageously, the method can provide active support, for example, when trying on data glasses without additional external measuring systems.

[0013] In the outputting step, the modulated light can be output in the beam path by means of an optical element that can be deflected with a given angular orientation and directed onto the eye via the hologram element. In the evaluating step, the distance for the given angular orientation of the optical element can be determined. Advantageously, this makes it possible to determine a distance between the optical element and the spectacle lens for the given angular orientation of the optical element. The optical element can advantageously be designed as a deflectable mirror that can be configured to reflect and thus direct light. The angular orientation can relate to a position of the optical element, which can advantageously be preset, in particular relative to the temple.

[0014] According to one embodiment, in the evaluation step, the reflected light can be evaluated using at least one evaluation rule, which can use a laser power, an electrical voltage, and additionally or alternatively a light frequency of the sensor unit. The light frequency can be, for example, the Doppler frequency or a beat frequency. The evaluation rule can advantageously specify which parameter of the reflected light is to be evaluated. This can advantageously be situation-dependent or dependent on an area of ​​application.

[0015] Additionally, the method can include a step of controlling at least one eyeglass component of the data glasses using the at least one operating parameter. The eyeglass component can, for example, be an actuator within the data glasses, which can be configured to change the position of the optical element. A light source of the sensor unit can also be referred to as an eyeglass component, for example. In this way, the operation of the data glasses can be reliably and precisely adapted to the determined positional relationship between the lens and the temples.

[0016] According to one embodiment, in the step of controlling, the at least one spectacle component of the data glasses can be controlled using the at least one operating parameter in order to adjust the angular orientation of the optical element depending on the operating parameter.

[0017] Advantageously, the data glasses can continue to function correctly even if, for example, a temple has been deformed.

[0018] Furthermore, in the controlling step, the at least one spectacle component of the data glasses can be controlled using the at least one operating parameter in order to adjust a light intensity of the modulated light using the operating parameter if the at least one operating parameter exhibits a rotational deformation and additionally or alternatively a translational displacement. By adjusting the light intensity, color errors can advantageously be corrected. For example, such color errors can be detected by particularly noticeable deviations from reference data with which the at least one operating parameter can be compared. The method can comprise a step of storing the at least one operating parameter in a memory device of the data glasses. The memory device can be designed, for example, as a permanent memory that can be read out, for example, in the event of repair.Advantageously, orientation deviations can be stored for warranty queries and additionally or alternatively to assist in the event of a repair.

[0019] Furthermore, in the outputting step, the modulated light can be output using the sensor unit, wherein the modulated light can be directed via the hologram element onto an eye by means of the optical element, which can be deflected with at least one given further angular orientation. In the receiving step, the reflected light can be received using the sensor unit, which can be reflected at the eye in response to the modulated light and directed via the hologram element and the optical element onto the sensor unit. In the evaluating step, the reflected light can be evaluated using the sensor unit to determine a further distance between the optical element and the spectacle lens for the given further angular orientation of the optical element.In the determining step, the at least one operating parameter for operating the data glasses can be determined using the determined additional distance. This means that the steps of the method can be repeated or cyclically repeated for different angular orientations. For example, multiple distances can be determined, each of which can refer to a different angular orientation.

[0020] According to one embodiment, in the step of determining the at least one operating parameter, a determination rule can be used to determine the angular orientation, the further angular orientation, the distance, the at least one further distance, and a mathematical compensation model to determine an orientation of the spectacle lens relative to the sensor unit as an operating parameter. This means that, for example, from a known deflection of the optical element and the distance between the sensor unit and the spectacle lens or the optical element, several points can be determined, which together can be referred to as a 3D point cloud. Advantageously, a position of a plane can be determined from the determined values.

[0021] Furthermore, in the determining step, the determined distance can be compared with a reference value in order to determine the at least one operating parameter. Advantageously, a deviation can be easily detected from this, which can be counteracted by an action, such as controlling at least one component of the data glasses using the at least one operating parameter.

[0022] This method can be implemented, for example, in software or hardware or in a mixed form of software and hardware, for example in a control unit.

[0023] The approach presented here further provides a control unit configured to perform, control, or implement the steps of a variant of a method presented here in corresponding devices. This embodiment of the invention in the form of a control unit also allows the problem underlying the invention to be solved quickly and efficiently.

[0024] For this purpose, the control unit can have at least one computing unit for processing signals or data, at least one memory unit for storing signals or data, at least one interface to a sensor or an actuator for reading sensor signals from the sensor or for outputting control signals to the actuator, and / or at least one communication interface for reading or outputting data embedded in a communication protocol. The computing unit can be, for example, a signal processor, a microcontroller, or the like, wherein the memory unit can be a flash memory or a magnetic storage unit.The communication interface can be designed to read in or output data wirelessly and / or wired, wherein a communication interface that can read in or output wired data can read this data, for example, electrically or optically from a corresponding data transmission line or output it to a corresponding data transmission line.

[0025] In this context, a control unit can be understood as an electrical device that processes sensor signals and outputs control and / or data signals depending on them. The control unit can have an interface that can be implemented in hardware and / or software. In a hardware implementation, the interfaces can, for example, be part of a so-called system ASIC, which contains a wide variety of functions of the control unit. However, it is also possible for the interfaces to be separate integrated circuits or to consist at least partially of discrete components. In a software implementation, the interfaces can be software modules that are present, for example, on a microcontroller alongside other software modules.

[0026] Also advantageous is a computer program product or computer program with program code that can be stored on a machine-readable carrier or storage medium such as a semiconductor memory, a hard disk memory or an optical memory and is used to carry out, implement and / or control the steps of the method according to one of the embodiments described above, in particular when the program product or program is executed on a computer or a device.

[0027] Furthermore, data glasses are presented which have at least one spectacle lens having a hologram element, a temple connected to the spectacle lens, a sensor unit arranged on the temple and having a laser feedback interferometry sensor, at least one deflectable optical element arranged on the temple, and a control unit in a previously mentioned variant, wherein the control unit is coupled to the sensor unit and additionally or alternatively to the optical element in a signal-transmitting manner. The data glasses can advantageously have a plurality of spectacle lenses, into each of which, for example, at least one hologram element can be integrated. Alternatively, the at least one hologram element can be arranged on a surface of the spectacle lens. The spectacle lens can, for example, be transparent or tinted.The lens and the temple can be coupled to each other, for example, by means of a frame element. The temple can be pivotable relative to the lens. The sensor unit can be integrated into the temple or arranged thereon. The at least one optical element can be optional. The at least one optical element can advantageously be designed as a mirror that can be pivoted in at least one plane. The control unit can advantageously also be arranged in or on the temple.

[0028] Examples of the approach presented here are shown in the drawings and explained in more detail in the following description. It shows:

[0029] Fig. 1 is a schematic representation of an embodiment of data glasses;

[0030] Fig. 2 is a schematic representation of an embodiment of the functioning of data glasses;

[0031] Fig. 3 is a schematic diagram of a spectrum detected by a sensor unit of an embodiment of data glasses;

[0032] Fig. 4 is a schematic representation of an embodiment of the functioning of data glasses;

[0033] Fig. 5 is a flowchart of an embodiment of a method for operating data glasses; and

[0034] Fig. 6 shows a block diagram of a control unit according to one embodiment. In the following description of advantageous embodiments of the present invention, the same or similar reference numerals are used for the elements shown in the various figures and having similar functions, whereby a repeated description of these elements is omitted.

[0035] Fig. 1 shows a schematic representation of an embodiment of data glasses 100. The data glasses 100 have at least one spectacle lens 102, which has a hologram element 104 connected to the spectacle lens 102 and arranged, for example, as a transparent layer in or on the spectacle lens 102. The data glasses 100 also have a temple 106 connected to the spectacle lens 102, and a sensor unit 108 arranged on the temple 106, which has a laser feedback interferometry sensor 110. Furthermore, the data glasses 100 have at least one deflectable optical element 112 arranged on the temple 106, and a control unit 114 coupled to the sensor unit 108 and / or to the optical element 112 for signal transmission. In addition to the feedback interferometry sensor 110, the sensor unit 108 has a light source 116, which is designed, for example, as a laser.

[0036] The control unit 114 is configured to control and / or execute a method for operating the data glasses 100, as described in at least one of the following figures. More specifically, the method and the data glasses 100 enable a determination of the mechanical alignment of the spectacle lens 102 relative to the temple 106 by means of the sensor unit 108, which is also referred to, for example, as a moving beamlet retina projector. Such data glasses 100 with a hologram element 104 are used, for example, to display information to a user that overlays the environment. The user should therefore continue to see the environment through the data glasses 100, but at the same time, information or data is displayed to them.

[0037] Since, as with normal eyeglasses, deformations of the temples 106 can also occur with data glasses 100, the described approach describes a concept and structure of the data glasses 100 with the holographic optical element (HOE), described here as hologram element 104, and with the sensor unit 108, which is also referred to as a laser-based retina projector, to enable the determination of the orientation of the lens coordinate system relative to the frame coordinate system. These temporary or permanent deformations are thereby compensated, for example.To achieve this, an alignment of the temple 106 to the lens 102 is continuously determined, which has arisen, for example, due to a deformation when putting on the data glasses 100, such as bending of the temple 106 in the case of a broad head, or due to permanent bending of the temple 106 to the lens 102 in the case of overstressing of the temple 106, for example after a fall or overstretching of the temple 106.

[0038] Fig. 2 shows a schematic representation of an embodiment of the functionality of data glasses, which, for example, corresponds to or is similar to the data glasses described in Fig. 1. Here, too, a sensor unit 108 is shown, which has both the feedback interferometry sensor 110 and the light source 116 for outputting modulated light 200. Furthermore, with reference to Fig. 2, an approach for a retinal projection system with a scanned laser system and a moving beamlet approach are described, which can also be implemented in data glasses as described in Fig. 1.

[0039] The sensor unit 108, also referred to as the laser module, integrates the laser feedback interferometry sensor 110 or LFI sensor and the light source 116, for example, an RGB color laser. Their outputs are combined via a beam combining unit, such as prisms, waveguides, or light couplers, to form an RGB / IR beam, previously described as light 200. Alternatively to integrating the LFI sensor 110 into the sensor unit 108, it can also be dedicatedly integrated into the system as a sensor element 202 and integrated into the overall system via a coupling structure 204.

[0040] According to this exemplary embodiment, the light 200 is then deflected in two dimensions via a 2D deflection unit 206. For example, the deflection unit 206 is embodied as at least one one-dimensional (1D) microelectromechanical system (MEMS) mirror, as a two-dimensional (2D) MEMS mirror, or as another 2D beam deflection unit, such as an SLM (spatial light modulator), a rotating prism, or as a mechanically actuated mirror. The light 200 is then guided as a 2D beam field onto a mechanical mirror, which was described, for example, as optical element 112 in Fig. 1 and which also deflects the light 200 in two dimensions. The light 200 is then redirected onto the spectacle lens 102 via a projection lens 208, which is embodied, for example, as a segment lens.A diffractive element, such as the hologram element 104, is integrated into the spectacle lens 102, which redirects the incident light 200 onto the eye 210.

[0041] The deflection function for visible RGB light 212 differs from the function for infrared light (IR). The RGB light 212 is deflected convergently so that the laser beams collect in the pupil 214. The IR light, on the other hand, is deflected less convergently, parallel, or even divergently, so that it illuminates an area 216 in the pupil plane. For pupil detection, for example, either a photodetector 218, such as a photodiode or a charge-coupled device (CCD), which is integrated or can be integrated into the spectacle frame or lens 102 and measures light 220 scattered by the surface of the eye, or the photodiode integrated in the LFI sensor 110, which evaluates the light 222 from the retina scattered back into the laser, is used.

[0042] If the eye 210 now moves, the cone of visible light 212 should be shifted so that colored light, and thus image content, continues to fall into the pupil 214, allowing an image to be written on the retina. To this end, the cone is shifted on the surface of the hologram element 104 using the optical element 112, also referred to as a 2D tilt mirror, and the projection optics. The optical element 112 is rotated so that a 2D scan field of the deflection unit 206 is deflected differently, so that the beam cone of visible light 212' follows the pupil 214', and light is projected into the eye 210 at the new pupil position. The following describes the operation of the LFI sensor 210 as an example. LFI sensors are based on an interferometric measuring method to detect both the distance to a target, i.e., to a target point, and the surface speed of the target.A laser, preferably in the infrared spectrum, emits light that strikes a surface with a reflectivity R at an angle y. The light is scattered back from this surface, returning to the laser cavity. There, it interferes with the locally oscillating field of the laser. This leads to a modulation of the laser power, which can be detected either by a photodiode integrated into the back reflector of the laser cavity or by direct measurement of the laser voltage. Furthermore, the laser current can be modulated with a preferably triangular modulation signal to achieve a cyclic shift of the laser wavelength.

[0043] If the laser parameters are known, the beat frequency fo and the Doppler frequency fd can then be determined using the following equations.

[0044] With known wavelength X, wavelength shift dA dt and cos(y), the surface velocity and the distance to the target can be determined.

[0045] For example, if the laser beam of an LFI sensor hits several partially transparent targets, several signals from the respective surfaces appear in the spectrum.

[0046] Fig. 3 shows a schematic diagram of a spectrum 300 detected by a sensor unit of an embodiment of data glasses. Such a spectrum 300 is detected or generated, for example, by an LFI sensor, the operation of which was previously described in Fig. 2. If a laser beam of an LFI sensor strikes, for example, several partially transparent targets, several signals or signal peaks from the respective surfaces occur in the spectrum 300, as mentioned above. In the diagram, a signal strength or signal power is plotted against a distance, for example in millimeters, in order to represent the spectrum 300.

[0047] According to this exemplary embodiment, a total of four signals or peaks 302, 304, 306, 308 can be seen in spectrum 300, which can be assigned to a corresponding distance. Peak 302, for example, represents reflections from the installed lenses, peak 304 represents a partial reflection from the 2D MEMS mirror, peak 306 represents the partial reflection from the optical element, and peak 308 represents the partial reflection from the optical deflector or the lens of the data glasses.

[0048] Fig. 4 shows a schematic representation of an embodiment of the functionality of data glasses, as described, for example, in Fig. 1 and / or Fig. 2. In other words, a setup for determining a spectacle lens pose relative to the spectacle coordinate system is described. For this purpose, the sensor unit 108 emits light 200 modulated by the light source, which is directed at the optical element 112 to the spectacle lens 102 and there finally directed to the eye 210. At the eye 210, the modulated light 200 is at least partially reflected back as reflected light 400, so that it travels the same path as the modulated light 200, with the sensor unit 108 ultimately evaluating the reflected light 400.

[0049] In order to determine the pose of the spectacle lens 102 relative to the coordinate system of the data glasses, the LFI sensor, which is already installed in the system for eye tracking, can be modulated to measure the distance between the HOE 104 in the spectacle lens 102 and the fixed sensor unit 108.

[0050] For this purpose, for example, the MEMS mirrors not shown in Fig. 4 are stopped and the optical element 112 is deflected along the two axes, while the LFI sensor is triangular modulated in order to measure the distance between a point 401 on the spectacle lens surface and the sensor unit 108 and / or the optical element 112. From known deflections of the optical element 112 and the measured distance to the optical element 112 and / or to the spectacle lens 102, for example in the x-direction, a 3D point cloud can be created. The 3D points are created from a unit vector with the optical element 112 as the origin of the vector and the direction from the elevation and azimuth angle of the optical element 112 as well as the vector length, which corresponds to the measured distance between the optical element 112 and the spectacle lens 102. A plane can then be determined using a determination rule in the generalThe plane equation ax + by + cz -d = 0 can be determined using, for example, a least-squares approach. The normal vector of the plane determines the orientation to optical element 112, which is fixed in the temple. The position of the plane is determined from the measured distances.

[0051] If, for example, the distances deviate from those previously determined during a factory calibration, this can be detected and the projection can then be adjusted to the new geometric relationships or the deviation can be entered in the permanent memory of the data glasses, which can be read out when the warranty is claimed.

[0052] Furthermore, the rasterizer can be adjusted for the changed measured geometry or deformation in the event of rotational deformations and / or translational displacements, so that different Tiit and MEMS mirror angles are used for the desired eyebox to create an eyebox at the original location. Furthermore, for example, the intensity of the laser can be adjusted for rotational deformations and / or translational displacements so that no color errors occur when the rays hit the HOE 104 at different angles, resulting in a corresponding reduction in diffraction efficiency. It is also possible to use the information obtained from the 3D point cloud to control a mechanical actuator that compensates for the negative consequences of the changed position of the spectacle lens 102.

[0053] Fig. 5 shows a flowchart of an embodiment of a method

[0054] 500 for operating data glasses, as described, for example, in one of the above-mentioned figures. Method 500 allows a pose of the spectacle lens relative to the coordinate system of the data glasses to be determined, as described, for example, in Fig. 4.

[0055] The method 500 comprises an output step 502, a receiving step 504, an evaluating step 506, and a determining step 508. In output step 502, modulated light is output using the sensor unit, wherein the modulated light is directed via the hologram element onto an eye of a wearer of the data glasses by means of the optical element, which is deflected with a given angular orientation. In receiving step 504, reflected light is received using the sensor unit, which, in response to the modulated light, is reflected at the eye and directed via the hologram element and the optical element onto the sensor unit. In evaluating step 506, the reflected light is evaluated using the sensor unit to determine a distance between the optical element and the spectacle lens for the given angular orientation of the optical element.In step 508 of determining, at least one operating parameter for operating the data glasses is determined using the determined distance.

[0056] According to one embodiment, in step 506 of evaluation, the reflected light is evaluated using at least one evaluation rule that uses a laser power, an electrical voltage, and / or a light frequency, such as the Doppler frequency or a beat frequency, of the sensor unit. Furthermore, in step 508 of determination, the determined distance is optionally additionally compared with a reference value to determine the at least one operating parameter.

[0057] According to one embodiment, the method 500 comprises a step 510 of storing the at least one operating parameter in a storage device, such as a permanent memory, of the data glasses. Further optionally, the method 500 comprises a step 512 of controlling at least one eyeglass component of the data glasses using the at least one operating parameter. For example, the angular orientation of the optical element is thereby adjusted depending on the operating parameter in order to continue to function correctly, for example, when the temple is deformed. Additionally or alternatively, a light intensity of the modulated light is thereby adjusted using the operating parameter if the at least one operating parameter indicates a rotational deformation and / or a translational displacement.

[0058] Steps 502, 504, 506, 508, 510, 512 of method 500 can further be carried out, for example, for multiple angular orientations, so that, for example, in step 502 of outputting, the modulated light is output using the sensor unit, wherein the modulated light is directed via the hologram element onto an eye by means of the optical element, which is deflected with at least one given further angular orientation. In step 504 of receiving, the reflected light is received using the sensor unit, which is reflected at the eye in response to the modulated light and directed via the hologram element and the optical element onto the sensor unit. The optical element still has the given further angular orientation.In step 506 of evaluation, the reflected light is evaluated using the sensor unit to determine a further distance between the optical element and the spectacle lens for the given further angular orientation of the optical element, and in step 508 of determination, the at least one operating parameter for operating the data glasses is determined using the determined further distance. For example, in step 508 of determination, the at least one operating parameter is determined using a determination rule that uses the angular orientation, the further angular orientation, the distance, the at least one further distance, and a mathematical compensation model to determine an orientation of the spectacle lens relative to the sensor unit as an operating parameter.

[0059] Fig. 6 shows a block diagram of a control unit 114, such as was described in Figure 1 as part of a pair of data glasses. For this purpose, the control unit 114 has an output unit 600, a receiving unit 602, an evaluation unit 604, and a determination unit 606. Only optionally, the control unit 114 has a control unit 608 and a memory unit 610. The output unit 600 is configured to output modulated light using the sensor unit 108, wherein the light is directed via the hologram element onto an eye of a wearer of the data glasses by means of the optical element, which is deflected with a given angular orientation. The receiving unit 602 is configured to receive reflected light using the sensor unit, wherein the reflected light is reflected off the eye in response to the modulated light and is directed via the hologram element and the optical element onto the sensor unit.The evaluation unit 604 is configured to evaluate the reflected light using the sensor unit in order to determine a distance 612 between the optical element and the spectacle lens for the given angular orientation of the optical element. The determination unit 606 is configured to determine at least one operating parameter 614 for operating the data glasses using the determined distance 612. For example, the control unit 608 is configured to control at least one spectacle component 616 of the data glasses using the at least one operating parameter 614. The storage unit 610 is configured to store the at least one operating parameter 614 in a storage device 618, such as a permanent memory of the data glasses.

[0060] If an angular orientation of the optical element is changed, the evaluation unit 604 is further configured to evaluate the reflected light using the sensor unit 108 in order to determine a further distance 620 between the optical element and the spectacle lens for the given further angular orientation of the optical element. Consequently, the determination unit 606 is also configured to determine the at least one operating parameter 614 for operating the data glasses using the determined further distance 620. For example, the determination unit 606 is configured to determine the at least one operating parameter 614 using a determination rule 622 that uses the angular orientation, the further angular orientation, the distance 612, the at least one further distance 620, and a mathematical compensation model to determine an orientation of the spectacle lens relative to the sensor unit 108 as the operating parameter 614.

[0061] If an embodiment includes an “and / or” connection between a first feature and a second feature, this is to be read as meaning that the

[0062] Embodiment according to one embodiment has both the first feature and the second feature and according to another embodiment has either only the first feature or only the second feature.

Claims

Claims 1. A method (500) for operating data glasses (100), wherein the data glasses (100) have a spectacle lens (102) with a hologram element (104) and a temple (106) with a sensor unit (108), wherein the sensor unit (108) has a laser feedback interferometry sensor (110), the method (500) comprising the following steps: Outputting (502) modulated light (200) using the sensor unit (108), wherein the modulated light (200) is directed in a beam path via the hologram element (104) onto an eye (210); Receiving (504) reflected light (400) using the sensor unit (108), wherein the reflected light (400) comprises light reflected across the beam path in response to the modulated light (200); Evaluating (506) the reflected light (400) using the sensor unit (108) to determine a distance (612) between the sensor unit (108) and an optical device in the beam path; and Determining (508) at least one operating parameter (614) for operating the data glasses (100) using the determined distance (612).

2. Method (500) according to claim 1, wherein in the step (502) of outputting, the modulated light (200) is directed by means of an optical element (112) which is deflected with a given angular orientation in the beam path via the hologram element (104) onto the eye (210) is directed, wherein in step (506) of the evaluation the distance (612) for the given angular orientation of the optical element (112) is determined.

3. Method (500) according to one of the preceding claims, wherein in the step (506) of evaluating, the reflected light (400) is evaluated using at least one evaluation rule that uses a laser power, an electrical voltage and / or a light frequency of the sensor unit (108).

4. Method (500) according to one of the preceding claims, comprising a step (512) of controlling at least one eyeglass component (616) of the data glasses (100) using the at least one operating parameter (614).

5. The method (500) according to claims 2 and 4, wherein in the step (512) of controlling, the at least one spectacle component (616) of the data glasses (100) is controlled using the at least one operating parameter (614) in order to adjust the angular orientation of the optical element (112) depending on the operating parameter (614).

6. The method (500) according to any one of claims 4 to 5, wherein in the step (512) of controlling, the at least one eyeglass component (616) of the data glasses (100) is controlled using the at least one operating parameter (614) in order to adjust a light intensity of the modulated light (200) using the operating parameter (614) when the at least one operating parameter (614) indicates a rotational deformation and / or a translational displacement.

7. Method (500) according to one of the preceding claims, comprising a step (510) of storing the at least one operating parameter (614) in a storage device (618) of the data glasses (100).

8. The method (500) according to any one of claims 2 to 7, wherein in the outputting step (502), the modulated light (200) is output using the sensor unit (200), wherein the modulated light (200) is directed via the hologram element (104) onto an eye (210) by means of the optical element (112), which is deflected with at least one given further angular orientation, wherein in the receiving step (504), the reflected light (400) is received using the sensor unit (108), which light is reflected at the eye (210) in response to the modulated light (200) and is directed via the hologram element (104) and the optical element (112) onto the sensor unit (108), wherein in the evaluating step (506), the reflected light (400) is evaluated using the sensor unit (108) to determine a further distance (620) between the optical element (112) and the spectacle lens (102) for the given further angular orientation of the optical element (112),and wherein in step (508) of determining the at least one operating parameter (614) for operating the data glasses (100) is determined using the determined further distance (620).

9. The method (500) according to claim 8, wherein in the step (508) of determining the at least one operating parameter (614) is determined using a determination rule (622) which uses the angular orientation, the further angular orientation, the distance (612), the at least one further distance (622) and a mathematical compensation model to determine an orientation of the spectacle lens (102) relative to the sensor unit (108) as an operating parameter (614).

10. The method (500) according to any one of the preceding claims, wherein in the determining step (508) the determined distance (612) is compared with a reference value in order to determine the at least one operating parameter (614). 11 . Control device (114) which is configured to execute and / or control the steps (502, 504, 506, 508, 510, 512) of the method (500) according to one of the preceding claims in corresponding units (600, 602, 604, 606, 608, 610).

12. Computer program configured to execute and / or control the steps (502, 504, 506, 508, 510, 512) of the method (500) according to one of claims 1 to 10.

13. A machine-readable storage medium on which the computer program according to claim 12 is stored.

14. Data glasses (100) with the following features: at least one spectacle lens (102) having a hologram element (104); a spectacle temple (106) connected to the spectacle lens (102); a sensor unit (108) arranged on the spectacle temple (106) and having a laser feedback interferometry sensor (110); at least one deflectable optical element (112) arranged on the spectacle temple (106); and a control unit (114) according to claim 11, wherein the control unit (114) is coupled to the sensor unit (108) and / or to the optical element (112) in a signal-transmitting manner.

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