Optical measuring device for determining object information of an object in at least one monitoring region

Abstract

The invention relates to an optical measuring device for determining object information of objects in at least one monitored area, having at least one receiving device for receiving optical signals from at least one object. The at least one receiving device comprises at least one electro-optical receiver (34) for converting the optical signals into electrical signals. In the receiver light path of the at least one receiving device, in front of the at least one receiver (34), there is at least one light-diffraction element (52). The at least one receiver (34) has a plurality of receiving areas (40) which, when viewed in the direction of the at least one receiver axis (42), are arranged one behind the other and can be evaluated individually depending on the optical intensity received in each case. At least one boundary edge (54) of the at least one light-diffraction element (52), when viewed projected onto the at least one receiver (34), extends at least in some sections not perpendicularly to the at least one receiver axis (42).

Description

Technical Field

[0001] This invention relates to an optical measuring device for determining object information of an object in at least one monitored area, comprising at least one receiving device for receiving optical signals from at least one object.

[0002] - At least one of the receiving devices includes at least one electro-optic receiver for converting optical signals into electrical signals.

[0003] - and at least one of the optical diffraction elements is arranged in the receiver optical path of at least one receiving device upstream of at least one receiver. Background Technology

[0004] DE102011107585A1 discloses an optical measuring device including a housing. A transmission window is formed in the front wall of the housing. A pulsed laser is emitted to the outside through the transmission window. Furthermore, the housing includes a receiving window in the front wall located below the transmission window. A laser beam reflected by an object detected around a vehicle is received via the receiving window and processed by a receiving unit arranged in the housing. The receiving unit includes a receiver printed circuit board on which a photoreceiver, for example in the form of a detector, is arranged, and further includes a receiving optical unit, which may have a receiving lens and a deflecting mirror as a receiving deflector. The photoreceiver is preferably an APD diode. The receiving lens has a quadrilateral embodiment relative to its peripheral contour.

[0005] It has been found that, in particular, the diffraction effect at the straight periphery of the quadrilateral receiving lens can affect the complete illumination of the light signal on the light receiver.

[0006] As is well known, lines and edges produce diffraction patterns depending on their alignment. This effect was discovered in the single-slit experiment. Therefore, diffraction effects are caused by opaque objects. The light aperture in the receiver's optical path and the boundary of the opaque object thus produce diffraction patterns.

[0007] The present invention is based on the purpose of designing a measuring device of the type described in the introduction, wherein the determination of object information can be improved, particularly the complete illumination of the light receiver by the light signal. Summary of the Invention

[0008] According to the present invention, this objective is achieved by:

[0009] - At least one receiver has multiple receiving areas, which are arranged one after another when viewed along the axis of the at least one receiver, and can be evaluated individually with respect to the intensity of the light received by each area.

[0010] - and at least one boundary periphery of at least one optical diffraction element does not extend at least partially perpendicular to the axis of at least one receiver when viewed projected onto at least one receiver.

[0011] According to the present invention, at least one receiver has multiple receiving areas, on which optical signals can be incident and evaluated individually. Spatial resolution measurement is possible by means of multiple receiving areas. Since the optical signal is assigned to each receiving area separately, the direction from which the captured optical signal originates and the orientation of the corresponding object can be determined.

[0012] In this invention, light is understood to refer to electromagnetic radiation that is both visible and invisible to the human eye.

[0013] The receiving regions are arranged one after another along at least one receiver axis. Because at least one boundary periphery of at least one optical diffraction element extends at least partially not perpendicular to at least one receiver axis, the corresponding diffraction effect in the direction of at least one receiver axis is reduced. In this way, so-called "crosstalk" between adjacent receiving regions is reduced.

[0014] According to the present invention, the symmetry of the optical measurement device is used to influence the diffraction direction of the diffraction effect, thereby reducing crosstalk of the optical signal to multiple receiving areas.

[0015] Furthermore, the optical measuring device may advantageously have at least one transmission device. The transmission device can be used to generate an optical signal.

[0016] Furthermore, the optical measuring device may advantageously include at least one optical signal deflection device. The optical signal deflection device can be used to guide an optical signal from at least one transmitting device to at least one monitoring area and / or to at least one receiving device from at least one monitoring area.

[0017] Furthermore, the optical measuring device may advantageously include at least one control and evaluation device. The control and evaluation device can be used to control at least one transmitting device and / or at least one receiving device and / or at least one optical signal deflection device. Using the control and evaluation device, electrical signals from at least one receiving device that can characterize information about a specific object can be further received, evaluated, and / or possibly specifically transmitted to a driver assistance system.

[0018] At least one measuring device can advantageously operate according to the time-of-flight method, particularly the optical pulse time-of-flight method. Optical measuring devices operating according to the optical pulse time-of-flight method can be designed and referred to as time-of-flight (TOF) systems, optical detection and ranging (LiDAR) systems, laser detection and ranging (LaDAR) systems, etc. Here, the time of flight from transmitting a transmitted signal, particularly a light pulse, using a transmitter to receiving the corresponding reflected transmitted signal using a receiver is measured, thereby determining the distance between the measuring device and the identified object.

[0019] Advantageously, the measuring device can be designed as a scanning system. In this case, the monitored area can be sampled, i.e., scanned, using a transmitted signal. For this purpose, the corresponding transmitted signals, particularly the transmitted light beams, can be pivoted relative to their propagation direction over the monitored area. In this case, at least one deflection device can be used, particularly a scanning device, a deflecting mirror device, etc. Alternatively, the measuring device can be designed as a flash LiDAR. In this case, the monitored area can be completely illuminated by at least one light signal simultaneously.

[0020] Advantageously, the measuring device can be designed as a laser-based distance measurement system. A laser-based distance measurement system can have at least one laser as a light source. The at least one laser can be used to transmit, in particular, a pulsed laser beam as a transmission signal. The laser-based distance measurement system can advantageously be a laser scanner. A laser scanner can be used to sample the monitored area with a specific pulsed laser beam.

[0021] This invention can be used with vehicles, particularly motor vehicles. It is advantageously applicable to land-based vehicles, particularly buses, trucks, public buses, motorcycles, etc., as well as aircraft and / or ships. It can also be used with vehicles capable of autonomous or at least partially autonomous operation. However, the invention is not limited to vehicles. It can also be used for stationary operations.

[0022] The measuring device can be advantageously connected to at least one electronic control device of the vehicle, particularly a driver assistance system and / or chassis control system and / or driver information device and / or parking assistance system and / or gesture recognition, etc., or can be part of such a device or system. In this way, at least partial autonomous operation of the vehicle can be achieved.

[0023] Optical measuring equipment can be used to capture standing or moving objects, especially vehicles, people, animals, plants, obstacles, uneven roads, especially potholes or rocks, road boundaries, traffic signs, free space, especially free parking spaces, etc.

[0024] In an advantageous embodiment,

[0025] – At least one boundary periphery of at least one optical diffraction element may be at least one periphery of at least one optical lens.

[0026] – and / or at least one boundary periphery of at least one optical diffraction element may be the periphery of an aperture or a mask.

[0027] – and / or at least one boundary periphery of at least one optical diffraction element may be the periphery of a heating filament.

[0028] – and / or at least one boundary periphery of at least one optical diffraction element may be the periphery of a window of the housing of the measuring device.

[0029] In this way, the functional components of the measuring device, particularly optical lenses, apertures, masks, heating wires, windows, etc., can be arranged in the optical path of the receiver. These components represent optical diffraction elements, and their influence on the optical signal can be adjusted by means of the present invention.

[0030] Advantageously, at least one periphery of at least one optical lens can have the profile according to the invention. In this way, light diffraction effects can be easily and directly adapted to the lens.

[0031] At least one aperture or mask can be advantageously arranged at at least one optical lens. At least one aperture or mask can cover at least one periphery of the optical lens. This prevents light diffraction at the periphery of the optical lens. Instead, light diffraction occurs at the periphery of at least one aperture or mask. At least one periphery of at least one aperture or mask can have a profile according to the invention.

[0032] Advantageously, at least one heating wire can be arranged at a window in the housing of the measuring device. This allows for temperature control of the window, thus reducing the risk of fogging.

[0033] Advantageously, the periphery of the window in the housing of the measuring device can have the profile according to the invention. In this way, the effects of light diffraction can be easily and directly adapted to the window.

[0034] A window in the housing of the measuring device can be advantageously positioned in the optical path of the receiver. The optical signal can be transmitted from the monitoring area to at least one receiver through the window.

[0035] In another advantageous embodiment, when viewed projected onto at least one receiver, more than 7 / 10 of the periphery of at least one boundary of at least one optical diffraction element may not extend perpendicular to the axis of at least one receiver. This reduces crosstalk to multiple receiving regions and achieves a periphery of at least one boundary extending transversely to the axis of at least one receiver.

[0036] Advantageously, no portion of the perimeter of at least one boundary can extend perpendicular to the axis of at least one receiver. In this way, crosstalk in the direction of the axis of at least one receiver can be minimized.

[0037] In another advantageous embodiment, at least one boundary periphery of at least one optical diffraction element may extend at least partially in a zigzag shape and / or at least partially in a wavy shape and / or at least partially in a zigzag shape with flat and / or rounded tips and / or at least partially have a free-curved profile. This allows for the realization of a range of at least one optical diffraction element transverse to at least one receiver axis, wherein the extension perpendicular to at least one receiver axis can be minimized.

[0038] Advantageously, the profile around at least one boundary can be varied. This allows for more flexible adjustment of the profile, particularly to suit the geometry of the measuring device, in order to reduce the effect of the diffraction pattern on crosstalk.

[0039] In another advantageous embodiment, the optical measuring device may have a housing in which at least one receiving device is disposed, and the housing may have at least one window through which an optical signal can be transmitted from a monitoring area to the at least one receiving device. The at least one receiving device and possibly other components may be housed within the housing for protection. The at least one window may transmit optical signals, and in particular, receive optical signals. Furthermore, the at least one window may have at least one heating device, and in particular at least one heating wire. By means of the heating device, and in particular at least one heating wire, fogging of the at least one window can be prevented.

[0040] In another advantageous embodiment, at least one receiver may include a plurality of individual receiving elements, each having at least one receiving area, and / or at least one receiver may have at least one linear or area arrangement of the plurality of receiving areas. The individual receiving elements can be easily read separately, and the corresponding information can be evaluated. A linear or area arrangement of the plurality of receiving areas can be generated together.

[0041] At least one receiver may advantageously have or include at least one detector, particularly a line sensor or a surface sensor, especially multiple (avalanche) photodiodes, photodiode lines, CCD sensors, etc. Using such a receiver, optical signals can be quickly and accurately converted into corresponding electrical signals.

[0042] In another advantageous embodiment, at least one rectangular or square optical lens may be arranged in the receiver optical path. Compared to a circular optical lens, the optical signal can be better imaged onto the receiving area with a linear or planar arrangement of rectangular or square lenses. The periphery of the optical lens can be considered as the boundary periphery that can produce a diffraction pattern.

[0043] In another advantageous embodiment, the optical measuring device can be designed to determine at least one orientation of at least one captured object relative to the measuring device. This allows the determination of the object's position and / or size, particularly in the direction of at least one receiver axis. The object's height and / or width can be determined by means of the optical measuring device.

[0044] Furthermore, the optical measuring device can be advantageously designed to determine at least one distance and / or velocity of the captured object relative to the measuring device. With this object information, the object can be better characterized, and in particular, identified. The object information can be transmitted to the driver assistance system of a vehicle carrying the optical measuring device, resulting in the vehicle operating autonomously or partially autonomously. Attached Figure Description

[0045] Other advantages, features, and details of the invention will become apparent from the following description, wherein exemplary embodiments of the invention will be explained in more detail with reference to the accompanying drawings. Those skilled in the art will also readily consider individually the features disclosed in combination with the drawings, description, and claims, and combine them to form further meaningful combinations. Illustratively, in the drawings:

[0046] Figure 1 A front view of a motor vehicle with an optical measuring device is shown, which is used to monitor a monitored area in front of the motor vehicle in the direction of travel.

[0047] Figure 2 A longitudinal section of an optical measuring device according to a first exemplary embodiment is shown, which can be used in... Figure 1 In the vehicles;

[0048] Figure 3 It shows the way Figure 2 A view of the window of an optical measuring device;

[0049] Figure 4 This diagram shows a view through a window of an optical measuring device according to a second exemplary embodiment, which can be used in... Figure 1 In the vehicles;

[0050] Figure 5 This diagram shows a view through a window of an optical measuring device according to a third exemplary embodiment, which can be used in... Figure 1 In the vehicles;

[0051] Figure 6 It shows the way Figure 2 A view of the receiving lens of an optical measuring device;

[0052] Figure 7A view is shown through a receiving lens of an optical measuring device according to a fourth exemplary embodiment, which can be used in the vehicle shown in the figure;

[0053] Figure 8 A longitudinal section of an optical measuring device is shown, in which the present invention is not used;

[0054] Figure 9 It shows the way Figure 8 A view of the window of an optical measuring device.

[0055] In the accompanying drawings, the same parts have the same reference numerals. Detailed Implementation

[0056] Figure 1 A front view of a motor vehicle 10 in the form of a passenger car is illustrated. The motor vehicle 10 has a driver assistance system 12, which enables the motor vehicle 10 to operate autonomously or partially autonomously in a manner no longer of interest here.

[0057] The motor vehicle 10 also includes an optical measuring device 14, which is, for example, arranged in the front bumper. The optical measuring device 14 can be used to monitor an object 18 in a monitoring area 16 ahead of the motor vehicle 10 in the direction of travel, such as... Figure 2 As shown. The optical measuring device 14 can also be arranged at different positions on the motor vehicle 10 and have different alignments.

[0058] The optical measuring device 14 can be used to capture standing or moving objects 18, such as vehicles, people, animals, plants, obstacles, road irregularities, especially potholes or rocks, road boundaries, traffic signs, free space, especially free parking spaces, etc.

[0059] The optical measuring device 14 can be used to determine object information, such as the distance, direction, and speed of the captured object 18 relative to the optical measuring device 14, that is, relative to the motor vehicle 10. The measuring device 14 can be designed as, for example, a laser-based distance measuring system, such as a LiDAR system.

[0060] Optical measuring device 14 is connected to driver assistance system 12 for signal transmission. Object information of object 18 captured by optical measuring device 14 is transmitted to driver assistance system 12. The object information is processed by driver assistance system 12 and can be used to control the functions of motor vehicle 10.

[0061] Figure 2 A longitudinal section of the optical measuring device 14 according to a first exemplary embodiment is shown.

[0062] The optical measuring device 14 includes a housing 20. The housing 20 has a window 22 on its side facing the monitoring area 16.

[0063] The transmission device 24, the receiving device 26, and the control and evaluation device 28 are arranged in the housing 20.

[0064] During the operation of the measuring device 14, a transmitted light signal 30, for example in the form of a laser pulse, is generated using a transmission device 24. For example, the transmitted light signal 30 may be invisible to the human eye. The window 22 is made of a material that transmits the transmitted light signal 30. The transmitted light signal 30 is transmitted through the window 22 into the monitoring area 16.

[0065] Optionally, a light signal deflection device (not shown), such as a deflection mirror device, can be arranged in the housing 20 to guide the transmitted light signal 30 into the monitoring area 16.

[0066] The transmitted light segment 30 is reflected at object 18 in the monitoring area 16. For better distinction, the transmitted light signal 30 reflected in the direction of the measuring device 14 is hereinafter referred to as the received light signal 32. The received light signal 32 is transmitted to the receiving device 26 through window 22. The received light signal 22 in the housing 20 may optionally be deflected using a deflector device.

[0067] Using the receiving device 26, the received optical signal 32 is converted into an electrical signal and transmitted to the control and evaluation device 28. Object information is determined from the captured received optical signal 32, specifically the distance, direction, and speed of the captured object 18 relative to the measuring device 14. The control and evaluation device 28 transmits the object information to the driver assistance system 12.

[0068] The receiving device 26 includes, for example, a receiver 34 and a light-receiving lens 36. The receiving lens 36 and the window 22 are located in the receiver optical path 38 of the receiver 34. The receiver optical path 38, within the scope of this invention, is the path along which the received light signal 32 from the object 18 travels. For clarity, Figure 2 The receiver optical path 38 is represented only as a dashed axis. This axis is intended to indicate the center of the receiver optical path 38. The receiver optical path 38 is actually understood to represent a three-dimensional space, in which... Figure 2 For example, it extends upwards and downwards from the axis into the drawing plane and away from the drawing plane.

[0069] The receiving lens 36 is located between the window 22 and the receiver 34. The receiving lens 36 is used to focus the received light signal 32 onto the receiver 34.

[0070] Receiver 34 has a plurality of receiving regions 40. For example, the receiving regions 40 may be implemented as avalanche photodiodes. When viewed along the direction of the receiver axis 42, the receiving regions 40 are arranged one after another. In the exemplary embodiment shown, as Figure 2As shown, the receiver axis 42 extends vertically in space, perpendicularly aligned with the vehicle 10, resulting in receiving areas 40 overlapping each other. Utilizing the vertical arrangement of the receiving areas 40 according to the exemplary embodiment, the receiver 34 can be used to determine spatial height information regarding the captured object 18.

[0071] In addition to a standalone avalanche photodiode, receiver 34 can also be implemented as a line sensor having multiple image points arranged accordingly along receiver axis 42.

[0072] The receiving lens 36 has, for example, a quadrilateral, specifically a square or rectangular design. Figure 6 In the image, receiving lens 36 is shown in front of receiver 34. For clarity, in... Figure 6 The illustration of window 22 is omitted. The receiving lens 36 is aligned such that its two peripheries, particularly the upper periphery 46 and the lower periphery 48, extend perpendicularly to the receiver axis 42 when viewed on the receiver 34.

[0073] Two masks 44 are arranged on the receiving lens 36. For example, the masks 44 are located on the side of the receiving lens 36 facing the receiver 34. One mask 44 extends along and covers the upper periphery 46 of the receiving lens 36. The other mask 44 extends along and covers the lower periphery 48 of the receiving lens 36. On their facing sides, each mask 44 has a serrated boundary periphery 50.

[0074] In each case, mask 44 acts as a light diffracting element for receiving the light signal 32. It is well known that lines and edges, depending on their alignment, produce diffraction patterns. A diffraction pattern extending along the receiver axis 42 within the receiving region 40 can cause crosstalk between receiving regions 40. When projected onto receiver 34, none of the serrated boundary perimeters 50 of mask 44 extend perpendicularly to the receiver axis 42. In this way, it is ensured that the extension of the diffraction pattern caused by the boundary perimeters 50 in the receiving region 40 along the receiver axis 42 is reduced.

[0075] For example, two heating wires 52 are arranged at window 22. The heating wires 52 are protected from the environment, for example, located on the inside of window 22 facing the interior of housing 20. The heating wires 52 are connected to a power source, which is not shown for clarity. The heating wires 52 can be used to control the temperature of window 22 to prevent, for example, fogging or icing of window 22.

[0076] The heating wire 52 is located in the receiver optical path 38, and therefore also serves as a light diffraction element for receiving the light signal 32. Figure 2 and 3The upper periphery of the heating wire 52 forms a boundary periphery 54. Both the heating wire 52 and the boundary periphery 54 have a serrated profile. When projected onto the receiver 34 for observation, the boundary periphery 54 does not extend perpendicular to the receiver axis 42 at any point. This ensures that the spread of the diffraction pattern caused by the boundary periphery 54 in the direction of the receiver axis 42 in the receiving region 40 is reduced.

[0077] In addition to a common window 22 for transmitting optical signal 30 and receiving optical signal 32, separate transmission and receiving windows can be provided.

[0078] During measurement using measuring device 14, a transmitted light signal 30 is generated using transmission device 24 and enters monitoring area 16 through window 22.

[0079] The received light signal 32 reflected at object 18 initially passes through window 22. During this process, a diffraction pattern is generated at the periphery 54 of the boundary of heating wire 52. Due to the serrated profile of the periphery 52, the diffraction pattern extends at a certain angle relative to the receiver axis 42.

[0080] The received optical signal 32 is focused onto the receiver 34 using the receiving lens 36. During this process, a diffraction pattern is generated at the periphery 50 of the boundary of the mask 44. Due to the serrated profile of the periphery 50, the diffraction pattern extends at a certain angle relative to the receiver axis 42.

[0081] Based on the height of object 18, the corresponding received light signal 32 illuminates receiver 34 at the corresponding height within the full illumination area 56, such as... Figure 2 As shown. The shape of the fully illuminated region 56 is affected by the diffraction patterns generated at the boundary perimeters 50 and 54. Figure 3 The fully illuminated region 56 is shown by way of example, for illustrative purposes only. This region is star-shaped, with the peaks of the star extending at angles relative to the receiver axis 42. The actual shape of the fully illuminated region 56 depends particularly on the contours and arrangement of the boundary peripheries 50 and 54. Figure 3 For clarity, the diagrams of the receiving lens 36 and the transmitting device 24 are omitted.

[0082] Because the range of the diffraction pattern described above is reduced in the direction of the receiver axis 42 according to the present invention, in the illustrated exemplary embodiment, the full illumination region 56 fully illuminates the second receiving region 40 only from the top. The serrated contours of the boundary peripheries 50 and 54 respectively ensure that crosstalk from the top to the adjacent, specifically the first and third receiving regions 40, does not occur, or at least greatly reduces crosstalk.

[0083] Height information related to object 18 can be obtained from the received light signal 32, which is captured by the receiving area 40 illuminated by the fully illuminated area 56.

[0084] Figure 4 A window 22 with a heating wire 52 according to a second exemplary embodiment is shown. Figure 2 and 3 The elements of the first exemplary embodiment have the same reference numerals. The second exemplary embodiment differs from the first exemplary embodiment in that the heating wire 52 extends in a serrated shape.

[0085] Figure 5 A window 22 with a heating wire 52 is shown according to a third exemplary embodiment. (With) Figure 2 and 3 The elements of the first exemplary embodiment have the same reference numerals. The third exemplary embodiment differs from the first exemplary embodiment in that the serrated heating wire 52 has a flat tip at its reversal point. For example, when viewed projected onto the receiver 34, more than 7 / 10 of the extent of the corresponding boundary periphery 54 does not extend perpendicular to the receiver axis 42.

[0086] Figure 7 A receiving lens 36 with a mask 44 and a receiver 34 are shown in the measuring device 14 according to a fourth exemplary embodiment. Figure 2 and 3 Elements similar to those in the first exemplary embodiment have the same reference numerals. The fourth exemplary embodiment differs from the first exemplary embodiment in that the receiving area 40 of the receiver 34 is arranged in two dimensions, rows and columns. The receiver 34 has a vertical receiving axis 42a and a horizontal receiving axis 42b. Using the two-dimensional receiver 34, spatial horizontal and spatial vertical orientation information relative to the measuring device 14 associated with the object 18 can be determined.

[0087] To reduce the influence of the diffraction pattern caused by the lateral periphery 58 of the receiver lens 22 on the corresponding full illumination area during the corresponding measurements, the lateral periphery 58 is covered by vertically extending masks 44. Similar to the horizontally extending masks 44 at the upper periphery 46 and lower periphery 48, the lateral masks 44 have serrated boundary peripheries 54.

[0088] Figure 8 and 9For comparative purposes only, a measuring device 14 not according to the invention is shown, wherein, when viewed in projection, the heating wire 52 does not extend in a zigzag pattern but is straight and perpendicular to the receiver axis 42, i.e., not according to the invention. Without the mask 44, the upper periphery 46 and lower periphery 48, extending perpendicular to the receiver axis 42 when viewed in projection, produce a diffraction pattern that extends the full illumination area 56 in the direction of the receiver axis 42, for example, over the three receiving areas 40. This results in crosstalk of the received optical signal 32, for example, entering the first and third receiving areas 40 from the top, thus reducing accuracy in determining the height information of the object 18.

Claims

1. An optical measuring device (14) for determining object information of an object (18) in at least one monitored area (16), comprising at least one receiving device (26) for receiving an optical signal (32) from at least one object (18), - At least one of the receiving devices (26) includes at least one electro-optic receiver (34) for converting the optical signal (32) into an electrical signal and an optical receiving lens (36). - At least one of the optical diffraction elements (44, 52) is arranged in the receiver optical path (38) of at least one receiving device (26) upstream of at least one receiver (34), and - At least one receiver (34) has a plurality of receiving areas (40), which are arranged one after another when viewed in the direction of the axis (42) of the at least one receiver, and can be evaluated individually with respect to the light intensity received by each. Its features are, - At least one boundary periphery (50, 54) of the at least one optical diffraction element (44, 52) extends at least partially not perpendicular to the axis (42) of the at least one receiver when viewed when projected onto the at least one receiver (34), wherein at least one boundary periphery (50) of the at least one optical diffraction element (44) is the periphery of an aperture or mask, and at least one boundary periphery (50, 54) of the at least one optical diffraction element (44, 52) is configured to reduce crosstalk between adjacent receiving regions.

2. The optical measuring device according to claim 1, characterized in that, - At least one boundary periphery of at least one optical diffraction element is at least one periphery of at least one optical lens. - and / or at least one boundary periphery (54) of at least one optical diffraction element (52) is the periphery of the heating wire, - and / or at least one boundary periphery of at least one optical diffraction element is the periphery of the window of the housing of the measuring device.

3. The optical measuring device according to claim 1 or 2, characterized in that, When viewed on the at least one receiver (34), more than 7 / 10 of the extent of at least one boundary periphery (50, 54) of at least one optical diffraction element (44, 52) does not extend perpendicular to the axis (42) of the at least one receiver.

4. The optical measuring device according to any one of the preceding claims, characterized in that, At least one boundary periphery (50, 54) of at least one optical diffraction element (44, 52) extends at least partially in a zigzag shape and / or at least partially in a wavy shape and / or at least partially in a zigzag shape with flat and / or rounded tips and / or at least partially has a free-curved profile.

5. The optical measuring device according to any one of the preceding claims, characterized in that, The optical measuring device (14) has a housing (20) in which at least one receiving device (26) is arranged, and the housing (20) has at least one window (22) through which an optical signal (32) can be transmitted from the monitoring area (16) to the at least one receiving device (26).

6. The optical measuring apparatus according to any one of the preceding claims, characterized in that, At least one receiver (34) includes a plurality of individual receiving elements each having at least one receiving area (40), and / or at least one receiver (34) has at least one linear or planar arrangement of the plurality of receiving areas (40).

7. The optical measuring apparatus according to any one of the preceding claims, characterized in that, At least one rectangular or square optical lens (36) is arranged in the receiver optical path (38).

8. The optical measuring apparatus according to any one of the preceding claims, characterized in that, The optical measuring device (14) is designed to determine at least one orientation of at least one captured object (18) relative to the measuring device (14).

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