CN115840214A - Optical emission device and optical sensor - Google Patents
Optical emission device and optical sensor Download PDFInfo
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- CN115840214A CN115840214A CN202111196361.4A CN202111196361A CN115840214A CN 115840214 A CN115840214 A CN 115840214A CN 202111196361 A CN202111196361 A CN 202111196361A CN 115840214 A CN115840214 A CN 115840214A
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Abstract
The application discloses an optical emission device and an optical sensor, wherein the optical emission device comprises a main body, a light source and a first light blocking structure; the main body is provided with an emission cavity extending along a first preset direction, and the emission cavity is provided with a light inlet and a light outlet which are arranged along the first preset direction; the inner wall of the firing chamber has a first inner wall portion and a second inner wall portion, the first inner wall portion being disposed opposite the second inner wall portion; the light source and the main body are arranged along a first preset direction; the first light blocking structure is arranged on the first inner wall part of the emission cavity, and a light transmitting channel is arranged between the first light blocking structure and the second inner wall part; the first light blocking structure comprises a plurality of first light blocking sheets, and the first light blocking sheets are arranged along a first preset direction and are arranged at intervals. An extinction space is formed between every two adjacent first light blocking sheets, so that the energy of the wide-angle stray light can be effectively lost, the effect of approximate extinction is achieved, and the influence of the wide-angle stray light on the detection effect of the optical sensor can be reduced.
Description
Technical Field
The present application relates to the field of optical sensing technology, and in particular, to an optical transmitter and an optical sensor.
Background
The optical sensor is a device capable of converting an optical signal into an electrical signal, and generally comprises an optical transmitting device and an optical receiving device, wherein a light source in the optical transmitting device transmits a detection light beam to a target object, the optical receiving device receives a reflected light beam reflected by the target object and outputs a corresponding reflected signal, and a control part in the optical sensor processes the reflected signal to obtain parameters such as distance, direction, height, speed, posture and shape of the target object, so that a detection function is realized.
However, there is a large angle of stray light in the detection beam emitted by the light source towards the target object, which affects the detection effect of the optical sensor.
Disclosure of Invention
The application provides an optical emission device and optical sensor, can alleviate the influence of wide-angle stray light to optical sensor's detection effect.
In a first aspect, the present application provides an optical emitting device comprising:
the light source comprises a main body and a light source, wherein the main body is provided with an emission cavity extending along a first preset direction, the emission cavity is provided with a light inlet and a light outlet, and the light inlet and the light outlet are arranged along the first preset direction; the inner wall of the firing chamber has a first inner wall portion and a second inner wall portion, the first inner wall portion being disposed opposite the second inner wall portion;
the light source is arranged with the main body along the first preset direction, and a light emitting surface of the light source faces the light inlet;
the first light blocking structure is arranged on the first inner wall part of the emission cavity, and a light transmitting channel is arranged between the first light blocking structure and the second inner wall part; the first light blocking structure comprises a plurality of first light blocking pieces, and the first light blocking pieces are arranged along the first preset direction and are arranged at intervals.
In some embodiments of the present application, the optical emission device further comprises:
the second light blocking structure is arranged on the second inner wall part of the emission cavity, and the light transmitting channel is positioned between the second light blocking structure and the first light blocking structure;
the second light blocking structure comprises a plurality of second light blocking sheets, and the second light blocking sheets are arranged along the first preset direction and are arranged at intervals.
Based on the above embodiment, the two adjacent second light barriers also have an extinction space therebetween, the large-angle stray light with an angle outside the preset range and emitted to the second inner wall portion is blocked by the second light barrier structure, and multiple reflections occur in the extinction space between the two adjacent second light barriers, the first light barrier structure can effectively dissipate the energy of the large-angle stray light on one side of the light source, and the second light barrier structure can effectively dissipate the energy of the large-angle stray light on the other side of the light source, so that the influence of the large-angle stray light on the detection effect of the optical emission device can be further reduced.
In some embodiments of the present application, all the first light blocking sheets are disposed parallel to each other, and all the second light blocking sheets are disposed parallel to each other.
Based on the above embodiment, the design difference between each first light blocking sheet and each second light blocking sheet can be reduced, so that the difficulty of the preparation process of the first light blocking structure and the second light blocking structure can be reduced, and the first light blocking structure and the second light blocking structure can be conveniently prepared and molded.
In some embodiments of the present application, the first light blocking sheet and the second light blocking sheet are disposed in parallel.
Based on above-mentioned embodiment, reduce the design difference between first light blocking piece and the second light blocking piece to can further reduce the degree of difficulty of the preparation technology of first structure and the second structure of being in the light, be convenient for first structure and the preparation shaping of second structure of being in the light, make the difference of the extinction effect of first structure and the extinction effect of second structure of being in the light less simultaneously, thereby can promote the homogeneity of the light beam of following the light outlet of emission chamber and ejaculating.
In some embodiments of the present application, the first light blocking structure and the second light blocking structure are symmetrically distributed about a light emitting surface of the light source.
Based on the above embodiment, the first light blocking structure blocks and attenuates large-angle stray light on one side of the light source, the second light blocking structure can block and attenuate large-angle stray light on the other side of the light source, and the first light blocking structure and the second light blocking structure can be symmetrically distributed about the light emitting surface of the light source, so that light beams emitted from the light outlet of the emission cavity are approximately symmetrically distributed about the light emitting surface, thereby facilitating adjustment of the angle of the light beams emitted from the light outlet of the emission cavity, enabling the angle of most light beams in the light beams emitted from the light outlet of the emission cavity to be within a preset angle range, enabling the attenuation degree of the large-angle stray light on two sides of the light source to be approximately equal, and further improving the uniformity of the light beams emitted from the light outlet of the emission cavity.
In some embodiments of the present application, a light emitting surface of the light source extends along a second preset direction, the first inner wall portion and the second inner wall portion are arranged along a third preset direction, and the first preset direction, the second preset direction and the third preset direction are perpendicular to each other.
Based on the above embodiment, the position of the light source and the extending direction of the light emitting surface of the light source are designed, so that the angle of most light in the light beam emitted from the light outlet of the emission cavity is within the preset angle range, the influence of large-angle stray light on the detection effect of the optical emission device is reduced, the light emitting amount of the light source is increased, and the detection precision of the optical emission device can be improved.
In some embodiments of the present application, the first light blocking structure and the second light blocking structure both extend from the light inlet to the light outlet.
Based on the above embodiment, by increasing the extending length of the first light blocking structure and the second light blocking structure, the extinction effect of the first light blocking structure and the extinction effect of the second light blocking structure can be further increased, and the first light blocking structure and the second light blocking structure have a light blocking function.
In some embodiments of this application, the light source with go into the light mouth and follow the interval of first predetermined direction is a1, the transmission chamber is followed the length of first predetermined direction is a2, the center of light emitting area with the interval of first inner wall part along the third predetermined direction is L1, the center of light emitting area with the interval of second inner wall part along the third predetermined direction is L2, first light blocking piece with an contained angle that forms between the first inner wall part is theta 1, the second light blocking piece with an contained angle that forms between the second inner wall part is theta 2, wherein:
based on the above embodiment, by designing θ 1 and θ 2, after the light beam emitted into the emission cavity from the light source is adjusted by the first light blocking structure and the second light blocking structure, the angle of most of light in the light beam emitted from the light outlet is within the preset angle range, so that the influence of large-angle stray light on the detection effect of the optical emission device can be reduced.
In some embodiments of the present application, in the first light blocking structure, a length of the first light blocking sheet along the third preset direction is m1, a distance between the first light blocking sheet and the light entrance along the first preset direction is n1, and m1 is in direct proportion to n 1;
in the second light blocking structure, the length of the second light blocking sheet along the third preset direction is m2, the distance between the second light blocking sheet and the light inlet along the first preset direction is n2, and m2 is in direct proportion to n 2.
Based on the above embodiment, the first light blocking structure is a trapezoid structure gradually widening from the light inlet to the light outlet, and the second light blocking structure is also a trapezoid structure gradually widening from the light inlet to the light outlet, so that the light transmission channel between the second light blocking structure and the first light blocking structure gradually narrows from the light inlet to the light outlet, and the width of the light outlet can be reduced on the premise of ensuring the extinction effect of the first light blocking structure and the second light blocking structure, thereby reducing the angle of the light beam emitted from the light outlet of the emission cavity.
In a second aspect, the present application also provides an optical sensor comprising an optical emitting device as described in any of the above embodiments.
The beneficial effect of this application does: the first light blocking structure is arranged on the first inner wall part, an extinction space is formed between every two adjacent first light blocking sheets, light with the angle within a preset angle range in a light beam entering the emission cavity is emitted through the light transmission channel normally, large-angle stray light with the angle outside the preset angle range and emitted to the first inner wall part can be blocked by the first light blocking structure, multiple reflection occurs in the extinction space between every two adjacent first light blocking sheets, the energy of the large-angle stray light can be effectively consumed, the effect of approximate extinction is achieved, the influence of the large-angle stray light on the detection effect of the optical sensor can be reduced, and the radar point cloud effect is optimized.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or related technologies of the present application, the drawings needed to be used in the description of the embodiments or related technologies are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic perspective view of an optical transmitter in an embodiment of the present application;
FIG. 2 is a schematic plan view of an optical transmitter according to an embodiment of the present application;
FIG. 3 is a schematic perspective view of an optical transmitter according to another embodiment of the present application;
fig. 4 is a schematic perspective view of an optical transmitter according to another embodiment of the present application.
Reference numerals:
10. a main body; 11. a launch chamber; 111. a light inlet; 112. a light outlet; 113. a first inner wall portion; 114. a second inner wall portion; 20. a light source; 21. a light emitting face; 30. a first light blocking structure; 31. a first light-blocking sheet; 40. a second light blocking structure; 41. a second light blocking sheet; 50. a light-transmitting channel.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The optical sensor is a device capable of converting an optical signal into an electrical signal, and generally comprises an optical transmitting device and an optical receiving device, wherein a light source in the optical transmitting device transmits a detection light beam to a target object, the optical receiving device receives a reflected light beam reflected by the target object and outputs a corresponding reflected signal, and a control part in the optical sensor processes the reflected signal to obtain parameters such as distance, direction, height, speed, posture and shape of the target object, so that a detection function is realized.
However, when the light source emits the probe beam toward the target object, the probe beam may be reflected multiple times on the wall of the emission cavity to cause large-angle stray light, which may affect the detection effect of the optical sensing device.
The embodiment of the application provides an optical emission device and an optical sensor, which are used for solving the problem that the detection effect of the optical sensor is influenced by large-angle stray light in a detection beam emitted to a target object by a light source.
In a first aspect, the present application provides an optical emission device, as shown in fig. 1 and 2, comprising a body 10 and a light source 20.
The main body 10 has an emission cavity 11 extending along a first preset direction AA, the emission cavity 11 has a light inlet 111 and a light outlet 112, and the light inlet 111 and the light outlet 112 are arranged along the first preset direction AA; the inner wall of the emission cavity 11 has a first inner wall portion 113 and a second inner wall portion 114, the first inner wall portion 113 is disposed opposite to the second inner wall portion 114, it should be noted that the main body 10 may be made of a non-light-transmissive material, such as a non-light-transmissive plastic, a metal, a wood, or a resin, and the embodiment of the present application is not limited in particular. The shapes of the main body 10 and the emission cavity 11 may be cylindrical, square cylindrical or other shapes, and the embodiment of the present application is not particularly limited, and taking the shape of the emission cavity 11 as a square cylindrical shape as an example, at this time, the emission cavity 11 has a plurality of inner wall surfaces, the first inner wall portion 113 is one inner wall surface of the emission cavity 11, and the second inner wall portion 114 is another inner wall surface of the emission cavity 11.
The light source 20 and the main body 10 are arranged along the first preset direction AA, and a light emitting surface 21 of the light source 20 faces the light inlet 111. It should be noted that the light source 20 is used for emitting light beams into the emission cavity 11 of the main body 10, the light source 20 may be a surface light source 20, a point light source 20 or a line light source 20, the light source 20 may be a laser light source 20, and of course, the light source 20 may also be other kinds of light sources 20, such as a high-intensity LED light source 20.
It can be understood that, taking an optical sensor as an example of a laser radar applied to a vehicle, a light source 20 in an optical transmitter transmits a detection light beam to a target object according to a transmission signal, an optical receiver in the optical sensor receives a reflected light beam reflected by the target object and outputs a corresponding reflection signal, a control part in the optical sensor processes the reflection signal to form a radar cloud point image, and after data processing is performed on the radar cloud point image, parameters such as a distance, an azimuth, a height, a speed, an attitude, a shape and the like of the target object can be obtained, so that a radar detection function is realized. Of course, the optical sensor may also perform functions such as part diameter detection, surface roughness detection, strain detection, displacement detection, vibration detection, speed detection, distance detection, acceleration detection, and shape detection of an object, according to actual requirements.
In the present application, the main body 10 may adjust the beam angle of the light beam emitted by the light source 20, after the light beam emitted by the light source 20 enters the emission cavity 11 through the light entrance 111, the light beam emitted through the light exit 112 of the emission cavity 11 is the detection light beam, and the size of the light exit 112 is designed, so that the angle of most of the light in the light beam emitted from the emission cavity 11 is within the preset angle range, thereby eliminating a part of the large-angle stray light and obtaining the detection light beam within the preset angle range.
However, in the related art, the inner wall of the emission cavity 11 is generally a smooth plane, and it is known to those skilled in the art that when the light beam emitted from the light source 20 is emitted into the emission cavity 11, the inner wall of the emission cavity 11 reflects the light, so that the angle of the part of the light emitted from the light outlet 112 is not within the predetermined angle range, and thus the main body 10 cannot effectively eliminate the influence of the stray light on the optical sensor.
In particular, with continued reference to fig. 1 and 2, the optical emission device further includes a first light blocking structure 30, the first light blocking structure 30 is disposed on the first inner wall portion 113 of the emission cavity 11, and a light transmission channel 50 is disposed between the first light blocking structure and the second inner wall portion 114; the first light blocking structure 30 includes a plurality of first light blocking sheets 31, and the plurality of first light blocking sheets 31 are arranged along the first preset direction AA and are spaced apart from each other.
It should be noted that, in the present application, the first light blocking structure 30 is disposed on the first inner wall portion 113, an extinction space is formed between two adjacent first light blocking sheets 31, light with an angle within a preset angle range in the light beam entering the emission cavity 11 is emitted through the light transmission channel 50, and large-angle stray light with an angle outside the preset range and emitted to the first inner wall portion 113 is blocked by the first light blocking structure 30, and multiple reflections occur in the extinction space between two adjacent first light blocking sheets 31, so that energy of the large-angle stray light can be effectively lost, and an effect of approximate extinction is achieved, thereby an influence of the large-angle stray light on a detection effect of the optical sensor can be reduced, and a point cloud radar effect is optimized.
Specifically, with continued reference to fig. 1 and fig. 2, the optical emission device may further include a second light blocking structure 40, the second light blocking structure 40 is disposed on the second inner wall portion 114 of the emission cavity 11, and the light transmission channel 50 is located between the second light blocking structure 40 and the first light blocking structure 30.
The second light blocking structure 40 includes a plurality of second light blocking sheets 41, and the plurality of second light blocking sheets 41 are arranged along the first preset direction AA and are spaced apart from each other.
It can be understood that, an extinction space is also provided between two adjacent second light blocking plates 41, large-angle stray light having an angle outside the preset range and being emitted to the second inner wall portion 114 is blocked by the second light blocking structure 40, and multiple reflections occur in the extinction space between two adjacent second light blocking plates 41, the first light blocking structure 30 can effectively dissipate energy of the large-angle stray light at one side of the light source 20, and the second light blocking structure 40 can effectively dissipate energy of the large-angle stray light at the other side of the light source 20, so that the influence of the large-angle stray light on the detection effect of the optical sensor can be further reduced.
It should be noted that, in general, the more the number of the first light blocking sheets 31, the smaller the distance between two adjacent first light blocking sheets 31 is, the better the extinction effect of the first light blocking structure 30 is, and in a similar way, the more the number of the second light blocking sheets 41 is, the smaller the distance between two adjacent second light blocking sheets 41 is, the better the extinction effect of the second light blocking structure 40 is, and specific values of the distance between two adjacent first light blocking sheets 31 and the distance between two adjacent first light blocking sheets 31 may be selected according to actual requirements, which is not limited in this application.
It should be further noted that the material for preparing the first light blocking sheet 31 and the second light blocking sheet 41 can be a non-light-transmitting material, such as a non-light-transmitting plastic, a metal, a wood, or a resin, and the embodiment of the present application is not limited in particular. The shape of the first light-blocking sheet 31 may be adapted to the shape of the cross-section of the first inner wall portion 113 and the shape of the second light-blocking sheet 41 may be adapted to the shape of the cross-section of the second inner wall portion 114.
With continued reference to fig. 1 and fig. 2, in some embodiments of the present application, all of the first light blocking sheets 31 are disposed in parallel to each other, and all of the second light blocking sheets 41 are disposed in parallel to each other, so as to reduce the design difference between each first light blocking sheet 31 and each second light blocking sheet 41, thereby reducing the difficulty of the manufacturing process of the first light blocking structure 30 and the second light blocking structure 40, and facilitating the manufacturing and forming of the first light blocking structure 30 and the second light blocking structure 40.
Further, the first light blocking sheet 31 may be parallel to the second light blocking sheet 41 to reduce the design difference between the first light blocking sheet 31 and the second light blocking sheet 41, so as to further reduce the difficulty of the manufacturing process of the first light blocking structure 30 and the second light blocking structure 40, which is convenient for the manufacturing and forming of the first light blocking structure 30 and the second light blocking structure 40, and meanwhile, the difference between the extinction effect of the first light blocking structure 30 and the extinction effect of the second light blocking structure 40 is smaller, so as to improve the uniformity of the light beam emitted from the light outlet 112 of the emission cavity 11.
It should be noted that the first light blocking sheets 31 may also be disposed opposite to the second light blocking sheets 41 one by one, so as to further eliminate a difference between the extinction effect of the first light blocking structure 30 and the extinction effect of the second light blocking structure 40, and improve uniformity of the light beam emitted from the light exit 112 of the emission cavity 11.
With continued reference to fig. 1 and fig. 2, in an embodiment of the present application, the first light blocking structure 30 and the second light blocking structure 40 may also be symmetrically distributed with respect to the light emitting surface 21 of the light source 20.
It can be understood that the first light blocking structure 30 blocks and attenuates the large-angle stray light on one side of the light source 20, the second light blocking structure 40 can block and attenuate the large-angle stray light on the other side of the light source 20, and the first light blocking structure 30 and the second light blocking structure 40 can be symmetrically distributed with respect to the light emitting surface 21 of the light source 20, so that the light beam emitted from the light outlet 112 of the emission cavity 11 is substantially symmetrically distributed with respect to the light emitting surface 21, thereby facilitating adjustment of the angle of the light beam emitted from the light outlet 112 of the emission cavity 11, enabling the angle of most of the light in the light beam emitted from the light outlet 112 of the emission cavity 11 to be within a preset angle range, and the attenuation degree of the large-angle stray light on both sides of the light source 20 to be substantially equivalent, and further improving the uniformity of the light beam emitted from the light outlet 112 of the emission cavity 11.
It should be further noted that, the first light blocking structure 30 may further include a first substrate, and the second light blocking structure 40 may further include a second substrate, after the first light blocking sheet 31 is fixed on the first substrate to form the first light blocking structure 30, and the second light blocking sheet 41 is fixed on the second substrate to form the second light blocking structure 40, the first substrate and the second substrate are fixed on the first inner wall portion 113 by means of screw connection, riveting, hinging, or welding, etc., so as to facilitate the preparation and molding of the first light blocking structure 30 and the second light blocking structure 40, and also facilitate the installation and fixation of the first light blocking structure 30 and the second light blocking structure 40 in the emission cavity 11.
With continued reference to fig. 1 and fig. 2, in some embodiments of the present application, the light emitting surface 21 of the light source 20 extends along a second predetermined direction BB, the first inner wall portion 113 and the second inner wall portion 114 are arranged along a third predetermined direction CC, and the first predetermined direction AA, the second predetermined direction BB, and the third predetermined direction CC are perpendicular to each other.
It can be understood that, by designing the position of the light source 20 and the extending direction of the light emitting surface 21 of the light source 20, the light emitting amount of the light source 20 is increased on the premise of ensuring that the angle of most of the light in the light beam emitted from the light outlet 112 of the emission cavity 11 is within the preset angle range to reduce the influence of the large-angle stray light on the detection effect of the optical sensor, so that the detection accuracy of the optical sensor can be improved.
Further, the first light blocking structure 30 and the second light blocking structure 40 may both extend from the light inlet 111 to the light outlet 112, and it can be understood that the extending lengths of the first light blocking structure 30 and the second light blocking structure 40 are increased to further increase the extinction effects of the first light blocking structure 30 and the second light blocking structure 40, and the first light blocking structure 30 and the second light blocking structure 40 have a light blocking function, and when the light outlet 112 is also provided with the first light blocking sheet 31 and the second light blocking sheet 41, the lengths of the first light blocking sheet 31 and the second light blocking sheet 41 along the third preset direction CC may also be designed, so as to control the angle range of the light beam emitted from the light outlet 112 of the emission cavity 11.
Specifically, as shown in fig. 2, a distance between the light source 20 and the light inlet 111 along the first preset direction AA is a1, a length of the emission cavity 11 along the first preset direction AA is a2, a distance between a center of the light emitting surface 21 and the first inner wall portion 113 along the third preset direction CC is L1, a distance between a center of the light emitting surface 21 and the second inner wall portion 114 along the third preset direction CC is L2, an included angle formed between the first light blocking sheet 31 and the first inner wall portion 113 is θ 1, and an included angle formed between the second light blocking sheet 41 and the second inner wall portion 114 is θ 2, where:
it is to be understood that when the first light-blocking sheet 31 is perpendicular to the first inner wall portion 113, θ 1 is a right angle, and when the first light-blocking sheet 31 is not perpendicular to the first inner wall portion 113, θ 1 is an acute angle; when the second polarizer 41 is perpendicular to the second inner wall portion 114, θ 2 is a right angle, and when the second polarizer 41 is not perpendicular to the second inner wall portion 114, θ 2 is an acute angle.
It can be further understood that the angle α of the light beam emitted from the light outlet 112 of the emission cavity 11 depends on the distance between the light source 20 and the light inlet 111 along the first preset direction AA, the length of the emission cavity 11 along the first preset direction AA, the distance between the center of the light emitting surface 21 and the first inner wall portion 113 and the second inner wall portion 114 along the third preset direction CC, and the like, and the angle α of the light beam emitted from the light outlet 112 of the emission cavity 11 is:
it should be further noted that, by designing θ 1 and θ 2, after the light beam emitted into the emission cavity 11 by the light source 20 is adjusted by the first light blocking structure 30 and the second light blocking structure 40, the angle of most of the light in the light beam emitted from the light outlet 112 is within the preset angle range, so that the influence of the stray light with large angle on the detection effect of the optical sensor can be reduced.
As shown in fig. 2, in an embodiment of the present application, lengths of the first light blocking sheets 31 along the third preset direction CC may be the same, lengths of the second light blocking sheets 41 along the third preset direction CC may be the same, at this time, the whole first light blocking structure 30 is square, and the whole second light blocking structure 40 is also square.
Of course, the first light blocking structure 30 and the second light blocking structure 40 may also be designed into other shapes, as shown in fig. 3, in another embodiment of the present application, in the first light blocking structure 30, the length of the first light blocking sheet 31 along the third preset direction CC is m1, the distance between the first light blocking sheet 31 and the light entrance 111 along the first preset direction AA is n1, the m1 is in direct proportion to the n1, and at this time, the whole of the first light blocking structure 30 is trapezoidal.
In the second light blocking structure 40, a length of the second light blocking sheet 41 along the third preset direction CC is m2, a distance between the second light blocking sheet 41 and the light entrance 111 along the first preset direction AA is n2, the m2 is in direct proportion to the n2, and at this time, the whole second light blocking structure 40 is in a trapezoid shape.
It can be understood that the first light blocking structure 30 is a trapezoid structure gradually widening from the light inlet 111 to the light outlet 112, and the second light blocking structure 40 is also a trapezoid structure gradually widening from the light inlet 111 to the light outlet 112, so that the light transmitting channel 50 between the second light blocking structure 40 and the first light blocking structure 30 gradually narrows from the light inlet 111 to the light outlet 112, and the width of the light outlet 112 can be reduced on the premise of ensuring the extinction effect of the first light blocking structure 30 and the second light blocking structure 40, so that the angle of the light beam emitted from the light outlet 112 of the emission cavity 11 can be reduced.
With reference to fig. 3, in an embodiment of the present application, a length of the first light blocking sheet 31 along the second preset direction BB is greater than a length of the light source 20 along the second preset direction BB, and a length of the second light blocking sheet 41 along the second preset direction BB is greater than a length of the light source 20 along the second preset direction BB, so that most of the large-angle stray light emitted into the emission cavity 11 by the light source 20 can be ensured to be attenuated by the first light blocking structure 30 and the second light blocking structure 40.
It should be noted that, two adjacent first light-blocking sheets 31 and two adjacent second light-blocking sheets 41 are connected by a connecting portion, and fig. 1 to 3 only illustrate a case that the cross section of the connecting portion is rectangular, and according to actual needs, as shown in fig. 4, the cross section of the connecting portion may also be arc-shaped.
Based on the optical emission device, an embodiment of the present application further provides an optical sensor, where the optical sensor includes the optical emission device in any of the embodiments. Of course, the optical sensor may also comprise all or part of the components of an optical receiving device, an optical adjusting device (which may be an optical lens, for example), a rotary drive, a housing or an optical scanning device.
The optical sensor may be mounted on a vehicle body of a vehicle, and the vehicle may be a vehicle of any specification and model, which is not specifically limited in the embodiments of the present application.
The optical sensor can be applied to an environment sensing system of a vehicle, and of course, the optical sensor can also be applied to an environment sensing system of an unmanned aerial vehicle or a robot and other devices to realize functions of 3d (3 Dimensions) sensing, environment image sensing and the like.
Of course, the optical sensor may also be applied to an active suspension system of a vehicle, for example, in the active suspension system, the optical sensor can send a corresponding signal to an electronic control unit of the vehicle according to the vehicle height, the vehicle speed, the steering angle, the speed, the brake, and the like, and the electronic control unit of the vehicle controls an actuating mechanism of the suspension, so that parameters such as the rigidity of the suspension, the damping force of the shock absorber, the vehicle height, and the like are changed, and the automobile has good riding comfort and operation stability. The optical sensor can also be applied to systems such as a light control system, a vehicle speed measuring system, a driving control system and the like of a vehicle.
The above description is only a preferred embodiment of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. An optical transmitter apparatus, comprising:
the light source comprises a main body and a light source, wherein the main body is provided with an emission cavity extending along a first preset direction, the emission cavity is provided with a light inlet and a light outlet, and the light inlet and the light outlet are arranged along the first preset direction; the inner wall of the firing chamber has a first inner wall portion and a second inner wall portion, the first inner wall portion being disposed opposite the second inner wall portion;
the light source is arranged with the main body along the first preset direction, and a light emitting surface of the light source faces the light inlet;
the first light blocking structure is arranged on the first inner wall part of the emission cavity, and a light transmitting channel is arranged between the first light blocking structure and the second inner wall part; the first light blocking structure comprises a plurality of first light blocking sheets, and the first light blocking sheets are arranged along the first preset direction and are arranged at intervals.
2. The optical emission device of claim 1, further comprising:
the second light blocking structure is arranged on the second inner wall part of the emission cavity, and the light transmitting channel is positioned between the second light blocking structure and the first light blocking structure;
the second light blocking structure comprises a plurality of second light blocking pieces, and the second light blocking pieces are arranged along the first preset direction at intervals.
3. The optical transmitter as claimed in claim 2, wherein all the first light-blocking sheets are disposed parallel to each other, and all the second light-blocking sheets are disposed parallel to each other.
4. The optical transmitter as claimed in claim 3, wherein the first light barrier is disposed in parallel with the second light barrier.
5. The optical transmitter according to claim 3 or 4, wherein the first light-blocking structure and the second light-blocking structure are symmetrically distributed with respect to a light-emitting surface of the light source.
6. The optical emission device according to claim 2, wherein the light emitting surface of the light source extends along a second predetermined direction, the first inner wall portion and the second inner wall portion are arranged along a third predetermined direction, and the first predetermined direction, the second predetermined direction and the third predetermined direction are perpendicular to each other.
7. The optical emitter according to claim 6, wherein the first light-blocking structure and the second light-blocking structure extend from the light inlet to the light outlet.
8. The optical transmitter according to claim 7, wherein a distance between the light source and the light inlet along the first predetermined direction is a1, a length of the transmitting cavity along the first predetermined direction is a2, a distance between the center of the light emitting surface and the first inner wall portion along the third predetermined direction is L1, a distance between the center of the light emitting surface and the second inner wall portion along the third predetermined direction is L2, an included angle formed between the first light blocking sheet and the first inner wall portion is θ 1, and an included angle formed between the second light blocking sheet and the second inner wall portion is θ 2, wherein:
9. the optical emission device according to claim 6, wherein in the first light blocking structure, a length of the first light blocking sheet along the third predetermined direction is m1, a distance between the first light blocking sheet and the light entrance along the first predetermined direction is n1, and m1 is proportional to n 1;
in the second light blocking structure, the length of the second light blocking sheet along the third preset direction is m2, the distance between the second light blocking sheet and the light inlet along the first preset direction is n2, and m2 is in direct proportion to n 2.
10. An optical sensor, characterized in that it comprises an optical emitting device according to any one of claims 1 to 9.
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| CN202111196361.4A CN115840214A (en) | 2021-10-13 | 2021-10-13 | Optical emission device and optical sensor |
| US17/963,981 US20230109942A1 (en) | 2021-10-13 | 2022-10-11 | Optical emitting device and optical sensor |
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| CN202111196361.4A CN115840214A (en) | 2021-10-13 | 2021-10-13 | Optical emission device and optical sensor |
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