CN112968350A - Laser equipment and electronic equipment - Google Patents
Laser equipment and electronic equipment Download PDFInfo
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- CN112968350A CN112968350A CN202110378629.XA CN202110378629A CN112968350A CN 112968350 A CN112968350 A CN 112968350A CN 202110378629 A CN202110378629 A CN 202110378629A CN 112968350 A CN112968350 A CN 112968350A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
- G01S7/4814—Constructional features, e.g. arrangements of optical elements of transmitters alone
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Abstract
本发明提出一种激光设备和电子设备，包括：基板；支架，设置在所述基板上；激光器，设置在所述基板上，位于所述支架内；光学元件，设置在所述支架上，所述光学元件包括相对设置的第一表面和第二表面；粘结层，设置在所述第二表面上；平凸透镜，设置在所述粘结层上；其中，所述第一表面朝向所述激光器，所述第一表面上设置有微透镜阵列，所述微透镜阵列中微透镜的曲率半径与孔径的比值小于0.5；其中，所述激光器发射的激光光束依次经过所述光学元件和所述平凸透镜出射，形成折射光束；其中，所述折射光束中心的照度小于所述折射光束边缘的照度。本发明提出的激光设备和电子设备可以减少能量损失。
The present invention provides a laser device and an electronic device, comprising: a substrate; a bracket, arranged on the substrate; a laser, arranged on the substrate, located in the bracket; an optical element, arranged on the bracket, the The optical element comprises a first surface and a second surface arranged oppositely; an adhesive layer is arranged on the second surface; a plano-convex lens is arranged on the adhesive layer; wherein, the first surface faces the A laser, a microlens array is arranged on the first surface, and the ratio of the curvature radius to the aperture of the microlens in the microlens array is less than 0.5; wherein, the laser beam emitted by the laser passes through the optical element and the The plano-convex lens emerges to form a refracted beam; wherein, the illuminance at the center of the refracted beam is smaller than the illuminance at the edge of the refracted beam. The laser equipment and electronic equipment proposed by the present invention can reduce energy loss.
Description
Technical Field
The present invention relates to the field of lasers, and in particular, to a laser device and an electronic device.
Background
A Vertical-Cavity Surface-Emitting Laser (VCSEL) is a semiconductor, and Laser light is emitted perpendicular to a top Surface, which is different from edge-Emitting Laser light generally emitted from an edge, because the VCSEL has a more advanced function than the edge-Emitting Laser light, with the rapid development of technology and the deep research of the VCSEL and the expansion of application requirements, the VCSEL not only plays an increasingly important role in the fields of mobile phones, consumer electronics, and the like, but also is used for face recognition, 3D sensing, gesture detection, VR (virtual reality)/AR (augmented reality)/MR (mixed reality), and the like.
When the VCSEL is applied to a TOF ranging module, a laser beam irradiates a target object and is subjected to diffuse reflection. The diffuse reflection light is received by the photosensitive array, so that the distance measurement work is carried out. However, when a larger Field angle (Field of View) is required to be used in the distance measuring module, the light sensing element receives light spots with high light intensity in the middle and low two sides, so that the overall distance measuring effect is affected, and meanwhile, the luminous intensity outside the Field angle is larger, and the energy consumption is increased.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention provides a laser device and an electronic device, wherein when a laser beam emitted from the laser device is irradiated onto a target object, the illuminance of the center of a refracted beam or a refracted spot is smaller than that of the edge of the refracted beam or the refracted spot, so that after being reflected by the target object, a reflected beam with uniform energy can be formed, and thus the ranging effect can be improved.
To achieve the above and other objects, the present invention provides a laser apparatus comprising:
a substrate;
a support disposed on the substrate;
the laser is arranged on the substrate and positioned in the bracket;
an optical element disposed on the support, the optical element including first and second oppositely disposed surfaces;
an adhesive layer disposed on the second surface;
a plano-convex lens disposed on the adhesive layer;
wherein the first surface faces the laser, a micro-lens array is arranged on the first surface, and the ratio of the curvature radius of the micro-lens in the micro-lens array to the aperture is less than 0.5;
the laser beam emitted by the laser sequentially passes through the optical element and the plano-convex lens to be emitted, and a refracted beam is formed;
wherein the illumination at the center of the refracted light beam is less than the illumination at the edge of the refracted light beam.
Further, the microlenses in the microlens array are quadric of revolution, and the function of the section of the microlenses is as follows:
where c denotes a curvature radius of the microlens, and k denotes a conic constant of the microlens.
Further, the conic constant is-1.5 to-0.5.
Furthermore, the central thickness of the plano-convex lens is 0.5-1.5 mm.
Further, the conic constant of the plano-convex lens is-1.5 to-0.5.
Furthermore, the curvature radius of the plano-convex lens is-10 to-30 mm.
Further, the thickness of the bonding layer is 100-200 microns.
Further, the angle of the center of the refracted light beam is-20 degrees to-20 degrees.
Further, the angle of the refracted beam edge is 20-60 degrees and-20-60 degrees.
Further, the present invention also provides an electronic device, comprising:
a laser device for emitting a laser beam, said laser beam being irradiated on an object to form a reflected beam;
a receiving device for receiving the reflected beam;
wherein the laser apparatus comprises:
a substrate;
a support disposed on the substrate;
the laser is arranged on the substrate and positioned in the bracket;
an optical element disposed on the support, the optical element including first and second oppositely disposed surfaces;
an adhesive layer disposed on the second surface;
a plano-convex lens disposed on the adhesive layer;
wherein the first surface faces the laser, a micro-lens array is arranged on the first surface, and the ratio of the curvature radius of the micro-lens in the micro-lens array to the aperture is less than 0.5;
the laser beam emitted by the laser sequentially passes through the optical element and the plano-convex lens to be emitted to form a refracted beam, and the refracted beam is reflected by the object to form a reflected beam;
wherein the illumination at the center of the refracted light beam is less than the illumination at the edge of the refracted light beam.
In summary, the present invention provides a laser device and an electronic device, the laser device is disposed on a substrate, an optical element is disposed above the laser device, a micro lens array is disposed on a side of the optical element close to the laser device, a side of the optical element far from the laser device is a plane, a plano-convex lens is disposed on the plane, so that when a laser beam emitted by the laser device is irradiated on the optical element, the optical element can act as a light-homogenizing function, and then the laser beam is irradiated on a target object after passing through the plano-convex lens, since the plano-convex lens can adjust an energy distribution of the laser beam, when the laser beam is irradiated on the target object, a refracted beam (refracted spot) having a central illuminance smaller than an edge illuminance can be formed, the refracted beam can also have a larger side slope (sideslope), after the refracted beam is reflected by the object, a reflected light beam with uniform illumination is formed, that is, a reflected light beam with uniform energy is obtained, so that when the receiving device receives the reflected light beam, the energy loss outside the angle of the field of view can be made smaller, and the ranging effect can be improved.
Drawings
FIG. 1: the laser device of the invention emits a schematic diagram of a refracted light beam.
FIG. 2: schematic representation of a laser apparatus of the present invention.
FIG. 3: top view of the bracket of the present invention.
FIG. 4: another schematic of the laser apparatus of the present invention.
FIG. 5: the laser apparatus of fig. 2 and 4 of the present invention forms the illuminance distribution of the refracted beam.
FIG. 6: the laser device in fig. 2 and 4 forms the beam profile and the fitting graph of the illumination distribution of the refraction beam in the X direction
FIG. 7: schematic representation of an electronic device of the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
Both manned and unmanned vehicles use imaging and image recognition to identify potential collisions or obstacles. In some embodiments, the vehicle may use a 3D imaging system to calculate the distance and closing speed of potential obstacles for collision avoidance and navigation. A 3D imaging system with a longer effective range and greater angular resolution may allow more time to respond to potential collisions and/or allow greater navigation accuracy.
In some embodiments, the accuracy with which a 3D imaging system can be utilized to image a target and/or environment can be related, at least in part, to the ratio of reflected light (light emitted from and reflected back to the imaging system) and ambient light captured by the imaging system. The captured reflected light may be increased by increasing the intensity or by altering the illumination field of the emitted light. In other embodiments, the accuracy with which the 3D imaging system can be utilized to image the target and/or environment can be related, at least in part, to the angular resolution with which the reflected light is collected and the accuracy with which the location of the visual feature can be identified.
As shown in fig. 1, the present embodiment proposes a laser apparatus 100, the laser apparatus 100 can be used to emit a laser beam, and since the laser apparatus 100 is provided with an optical element and a plano-convex lens, the laser beam exits after passing through the optical element and the plano-convex lens, so as to form a refracted beam 1, and when the refracted beam 1 is irradiated on a target object 300, a refracted spot can be formed. In the present embodiment, due to the action of the optical element and the plano-convex lens, the illuminance at the center of the refracted light beam 1 is less than the illuminance at the edge of the refracted light beam 1, so that a reflected light beam with uniform illuminance can be formed after the refracted light beam 1 is reflected by the target object 300, and therefore, when the laser device 100 is applied to an electronic device, the reflected light beam is received by the sensing device, so that the ranging effect can be improved.
As shown in fig. 1-2, the laser apparatus 100 may include a substrate 110, and a first pad 111 and a second pad 112 are further disposed on the substrate 110, and the first pad 111 is disposed on one side of the second pad 112. The substrate 110 may be a ceramic material with high thermal conductivity such as aluminum oxide, beryllium oxide, silicon carbide, and the like. The material of the first and second pads 111 and 112 may be a metal material, such as copper or gold.
As shown in fig. 2-3, fig. 3 shows a top view of the bracket 120. A holder 120 is provided on the substrate 110, and the holder 120 is used to support the optical element 140. The bracket 120 may be, for example, a square configuration, although the bracket 120 may also be a circular or oval configuration. The support 120 is, for example, perpendicular to the substrate 110. The material of the support 120 may be resin or alumina ceramic material. The holder 120 is, for example, glued to the base plate 110. An optical element 140 is disposed on the support 120, a laser 130 is disposed on the substrate 110, and the laser 130 is positioned within the support 120. The laser 130 may be a vertical cavity surface emitting laser, and the wavelength of the laser 130 may be 905 nm, 940 nm, 1350 nm, or other wavelengths. Of course, in some embodiments, in order to reduce the volume of the laser device 100, a step portion may be further provided on the top of the support 120, and the step portion may be used for placing the optical element 140.
As shown in fig. 2, in the present embodiment, the laser 130 is disposed on the first pad 111, for example, the cathode of the laser 130 is soldered on the first pad 111 through ag/au/sn, the anode of the laser 130 is connected to the second pad 112 through the gold wire 113, and when a voltage is applied to the first pad 111 and the second pad 112, the laser 130 is excited, so that the laser 130 emits a laser beam. The substrate 110 may be made of a ceramic material with high thermal conductivity such as aluminum oxide, beryllium oxide, silicon carbide, etc., and the thermal expansion systems of the ceramic substrate and the vertical cavity surface emitting laser of the gaas substrate are close to each other, so that stress can be reduced and reliability can be improved when the thermal expansion systems of the ceramic substrate and the gaas substrate are close to each other, and thermoelectric separation can be achieved because the ceramic substrate has high thermal conductivity and good insulation.
As shown in fig. 2, in the present embodiment, an optical element 140 is disposed on the top of the support 120, and the optical element 140 can perform a light-homogenizing function, i.e., improve the energy uniformity of the laser beam, thereby improving the energy utilization rate of the laser beam. The optical element 140 may include a first surface and a second surface. The first surface is disposed opposite the second surface, the first surface facing, for example, the substrate 110, and the second surface facing, for example, away from the substrate 110. That is, the back surface of the optical element 140 is a first surface, and the front surface of the optical element 140 is a second surface. A microlens array is also disposed on the first surface, and the microlens array may include a plurality of microlenses 141. The micro-lens 141 is also directed towards the substrate 110 or the laser 130. In the present embodiment, the optical element 140 may be a diffuser, and the optical element 140 may also adjust the shape/divergence angle/light intensity distribution of the laser beam.
As shown in fig. 2, in the present embodiment, the microlens 141 can be a quadric surface of revolution, and the cross section of the microlens 141 is, for example, a function of:
where c denotes a curvature radius of the microlens, and k denotes a conic constant of the microlens.
As shown in FIG. 2, in the present embodiment, the conic constant of the microlens 141 is, for example, -1.5 to-0.5, for example, -1.0. The ratio of the radius of curvature of the microlens 141 to the aperture may be less than 0.5, such as 0.2 or 0.25. For example, when the radius of curvature is 0.015mm and the aperture of the microlens 141 is 0.08mm, the ratio of the radius of curvature of the microlens 141 to the aperture is 0.18. By setting the microlens 141 for these parameters, the dodging effect can be improved, that is, the dodging effect can be achieved by improving the divergence angle/illumination distribution/spot intensity of the laser beam. In this embodiment, the ratio of the curvature radius of the microlens 141 to the aperture is smaller than 0.5, so that a light spot with a larger angle can be formed, and a light spot with uniform energy distribution can be obtained.
As shown in fig. 4, in order to further improve the energy distribution of the laser beam, the present embodiment proposes another laser apparatus 100, and the laser apparatus 100 is different from fig. 2 in that a plano-convex lens 160 is disposed on the optical element 140. In the embodiment, the adhesive layer 150 is first disposed on the second surface of the optical element 140, and the thickness of the adhesive layer 150 may be 100-200 microns, for example, 150 microns or 180 microns. A plano-convex lens 160 is then placed on the adhesive layer 150 with the flat surface of the plano-convex lens 160 in contact with the adhesive layer 150. The conic constant of the plano-convex lens 160 may be-1.5 to-0.5, the radius of curvature of the plano-convex lens 160 may be, for example, -10mm to-30 mm, for example, -15mm, and the "-" indicates the direction of curvature of the plano-convex lens 160 and does not indicate the size. The central thickness of the plano-convex lens 160 may be 0.5 to 1.5mm, for example, 1.0mm or 1.2 mm. The plano-convex lens 160 can adjust the energy distribution of the laser beam again, and can improve the utilization rate of energy while obtaining better energy distribution. The adhesive layer 150 is, for example, a transparent glue, and the adhesive layer 150 may have high transmittance to the wavelength of the laser 130. Of course, the optical element 140 and the plano-convex lens 160 may be formed by rolling integrally or by etching the micro-lenses 141 or the convex lenses on both sides. With this arrangement, the laser beam emitted from the laser 130 can be emitted through the optical element 140 and the plano-convex lens 160 in order to form a refracted beam, which is finally irradiated on the target object.
As shown in fig. 1 and 4, in the present embodiment, after the laser 130 is turned on, the laser 130 emits a laser beam, and the laser beam passes through the micro lens 141 and the plano-convex lens 160 to form the refracted beam 1, and at this time, due to the cooperation of the micro lens 141 and the plano-convex lens 160, the illuminance at the center of the refracted beam 1 is less than that at the edge of the refracted beam 1. In order to enable the plano-convex lens 160 to better adjust the energy distribution of the laser beam, in this embodiment, the ratio of the radius of curvature of the microlens 141 to the aperture is defined as a, the ratio of the radius of curvature of the plano-convex lens 160 to the aperture is set to 25A to 75A, and the ratio of the aperture of the plano-convex lens 160 to the aperture of the microlens 141 may be greater than 20, for example, 20 to 40. By designing the parameter relationship between the plano-convex lens 160 and the micro lens 141, when the laser beam is sequentially incident on the micro lens 141 and the plano-convex lens 160, the energy distribution of the laser beam can be adjusted, and thus a refracted beam with central illuminance lower than edge illuminance can be obtained.
As shown in fig. 1 and 5, fig. 5 shows an illuminance distribution diagram of a refracted light beam formed for the laser apparatus 100 in fig. 2 and 4. The left diagram in fig. 5 is obtained by exciting the laser apparatus 100 in fig. 2, and the right diagram in fig. 5 is obtained by exciting the laser apparatus 100 in fig. 4. In this embodiment, the laser 130 is a 10 × 10 array with a divergence angle of 21 °, the distance between the microlens 141 and the laser 130 is 0.4mm, the aperture of the microlens 141 is 0.06 × 0.08mm (square aperture array), the radius of curvature of the microlens 141 is 0.015mm, and the conic constant of the microlens 141 is-1. The aperture of the plano-convex lens 160 is 3 x 3mm, the radius of curvature of the plano-convex lens 160 is-10 mm, the conic constant of the plano-convex lens 160 is-1, and the center thickness of the plano-convex lens 160 is 0.6mm, and then the refracted light spot is formed by the receiver with the laser device 100 of fig. 2 and 4, respectively. By comparison, the angle range of the refracted light beam 1 in the left image is larger than that of the refracted light beam 1 in the right image, the illumination intensity at the center of the refracted light beam 1 in the left image is larger than that at the edge of the refracted light beam 1, and the illumination intensity at the center of the refracted light beam 1 in the right image is smaller than that at the edge of the refracted light beam 1. It can be known that, by providing the plano-convex lens 160 on the optical element 140, the plano-convex lens 160 can adjust the energy distribution of the laser beam again, thereby making the energy of the refracted beam 1 more concentrated and the light diffused at the outer circle less, so that the illuminance at the center of the refracted beam 1 is less than that at the edge of the refracted beam 1. Therefore, when the laser devices 100 in fig. 2 and 4 are respectively arranged in the electronic device, the refracted light beam 1 formed by the laser device 100 in fig. 4 can form a reflected light beam with uniform illumination or uniform energy after being reflected by the target object, and therefore, the reflected light beam can be better received by the receiving device, so that the measurement effect can be improved, and meanwhile, the utilization rate of energy can also be improved. As shown in fig. 5 to 6, fig. 6 is a beam profile and a fitting graph of the illuminance distribution of the refracted beam in the X direction formed by the laser apparatus 100 of fig. 2 and 4. This embodiment takes the beam profile in the X direction at y-0 in fig. 5, and normalizes the central intensity to obtain the curve in fig. 6.
A curve L1 in fig. 6 represents a fitted graph of the beam profile of the illuminance distribution of the refracted beam formed by the laser apparatus 100 in fig. 2 in the X direction, a curve L2 in fig. 6 represents a fitted graph of the beam profile of the illuminance distribution of the refracted beam formed by the laser apparatus 100 in fig. 4 in the X direction, and a curve L3 in fig. 6 represents a fitted graph of the illuminance to a curve L2. As can be seen from fig. 6, the curve L2 more closely follows the curve L3 than the curve L1, and the angular extent of the curve L2 is smaller than the angular extent of the curve L1. As can be seen from fig. 6, the illuminance between 0 ° and 20 ° of the curve L2 is smaller than the illuminance between 20 ° and 60 ° of the curve L2 between 0 ° and 20 °. Since the refracted light beam has a symmetrical structure, the illuminance of the curve L2 between 0 ° and-20 ° is smaller than the illuminance of the curve L2 between-20 ° and-50 °, so that-20 ° to 20 ° can be defined as the center of the refracted light beam, and-20 ° to-50 ° and 20 ° to 50 ° are defined as the edges of the refracted light beam. Comparing the curve L1 with the curve L2, the illuminance of the curve L1 between 0 ° and 20 ° is equal to or substantially equal to the illuminance of the curve L2 between 0 ° and 20 °, and the illuminance of the curve L1 between 20 ° and 60 ° is less than the illuminance of the curve L2 between 20 ° and 60 °. And as can be seen from fig. 6, the divergence angle of the curve L1 is larger than that of the curve L2, but the curve L2 has a larger side slope (sideslope), so that the energy loss of the refracted beam formed by the laser apparatus 100 in fig. 4 outside the angle of the field of view is smaller, and thus can be better applied in the electronic setting. When the laser apparatus 100 of fig. 4 is applied to an electronic apparatus, since the illuminance at the center of the refracted light beam is smaller than that at the edge of the refracted light beam, after the refracted light beam is reflected by the target object, a reflected light beam having uniform illuminance can be formed, and thus can be more easily received by the sensor.
As shown in fig. 7, the present embodiment proposes an electronic device 10, and the electronic device 10 may include a laser device 100 and a reception device 200. The laser apparatus 100 and the receiving apparatus 200 may be disposed in adjacent positions. The laser device 100 is used for emitting a refracted light beam 1, the refracted light beam 1 irradiates on a target object 300 to form a reflected light beam 2, it should be noted that the refracted light beam 1 irradiates on the target object 300 to form a light spot, and therefore the reflected light beam 2 is received by the receiving device 200 to form a reflected light spot. Since the light sensing element is provided in the receiving device 200, the reflected light beam 2 can be received by the receiving device 200, and the light sensing element can convert an optical signal into an electrical signal; then, the time difference between the time when the laser device 100 emits the refracted light beam 1 and the time when the receiving device 200 receives the reflected light beam 2 is calculated by the electronic device 10, and further the depth information of the target object 300, which can be used for ranging, for generating a depth image, or for three-dimensional modeling, or the like, is acquired. In some embodiments, the laser apparatus 100 and the receiving apparatus 200 may be fixed on the same circuit board. The circuit board can be a hard circuit board, a flexible circuit board or a rigid-flex circuit board. In the present embodiment, since the illuminance at the center of the refracted light beam 1 is smaller than that at the edge, after the refracted light beam 1 is reflected by the target object 300, the reflected light beam 2 with uniform illuminance, that is, the reflected light beam 2 with uniform energy, can be formed due to the diffuse reflection, and thus when the receiving device 200 collects the reflected light beam 2, the ranging effect can be improved.
As shown in fig. 7, in the embodiment, the electronic device 10 is, for example, a tof (time Of flight) camera module, and the tof (time Of flight) camera module can be used for a portable electronic device, such as a smart phone, a tablet computer, a portable computer, or other portable electronic devices.
As shown in fig. 7, in the embodiment, the electronic device 10 is, for example, a tof (time Of flight) camera module, which can be assembled to an electronic device to change an interaction manner between the electronic device and a person, such as functions Of gesture control, iris unlocking, and the like.
As shown in fig. 7, in this embodiment, the electronic device 10 is, for example, a tof (time Of flight) camera module, and the tof (time Of flight) camera module is applied to a video image capturing apparatus, such as a video camera, a camera, and the like, so that in the video image processing in the later stage, the special effect prop can be inserted into any position in the video image through simple post-processing, and in this way, on one hand, the fidelity Of the special effect can be enhanced, on the other hand, the shooting is not limited by the shooting location, and the manufacturing cost is greatly reduced.
As shown in fig. 7, in this embodiment, the electronic device 10 is, for example, a tof (time Of flight) camera module, and the tof camera module may be configured in a home device, such as an air conditioner, a refrigerator, a television, and the like, so as to change an interaction mode between a user and the home device, for example, to implement functions such as gesture control Of the home device.
As shown in fig. 7, in the present embodiment, the electronic device 10 is, for example, a tof (time Of flight) camera module, which can be assembled in a robot device to provide three-dimensional vision capability for the robot device, so that the robot device can achieve functions Of spatial positioning, path planning, obstacle avoidance, gesture control, and the like, so as to enable the robot device to better serve human beings, wherein the robot includes an entertainment robot, a medical robot, a home robot, a field robot, and the like.
As shown in fig. 7, in the embodiment, the electronic device 10 is, for example, a tof (time Of flight) camera module, and the tof camera module can be assembled in a security monitoring device, for example, a monitoring device, so as to improve the analysis accuracy Of the security monitoring device and increase intelligent applications such as behavior analysis.
As shown in fig. 7, in this embodiment, the electronic device 10 is, for example, a TOF (time Of flight) camera module, and the TOF camera module may be assembled in a terminal device Of the internet Of things, so as to collect depth information Of other terminal devices through the TOF camera module, so as to enhance the accuracy and the comprehensiveness Of communication between different terminals in the network Of the internet Of things.
As shown in fig. 7, in the present embodiment, the electronic device 10 is, for example, a TOF (time Of flight) camera module, which can be applied to an unmanned device, such as an unmanned vehicle, an unmanned plane, an unmanned ship, etc., and provides a three-dimensional visual base for the unmanned device through the TOF camera module to provide a technical guarantee for unmanned driving.
As shown in fig. 7, in the present embodiment, the electronic device 10 is, for example, a tof (time Of flight) camera module, and the tof camera module can be assembled in a medical device, such as an endoscope, an enteroscope, etc., so that the medical device can perform three-dimensional observation on a human organ to obtain more comprehensive information Of the human organ.
In summary, the present invention provides a laser device and an electronic device, the laser device is disposed on a substrate, an optical element is disposed above the laser device, a micro lens array is disposed on a side of the optical element close to the laser device, a side of the optical element far from the laser device is a plane, a plano-convex lens is disposed on the plane, so that when a laser beam emitted by the laser device is irradiated on the optical element, the optical element can act as a light-homogenizing function, and then the laser beam is irradiated on a target object after passing through the plano-convex lens, since the plano-convex lens can adjust an energy distribution of the laser beam, when the laser beam is irradiated on the target object, a refracted beam (refracted spot) having a central illuminance smaller than an edge illuminance can be formed, the refracted beam can also have a larger side slope (sideslope), after the refracted beam is reflected by the object, a reflected light beam with uniform illumination is formed, that is, a reflected light beam with uniform energy is obtained, so that when the receiving device receives the reflected light beam, the energy loss outside the angle of the field of view can be made smaller, and the ranging effect can be improved.
The above description is only a preferred embodiment of the present application and a description of the applied technical principle, and it should be understood by those skilled in the art that the scope of the present invention related to the present application is not limited to the technical solution of the specific combination of the above technical features, and also covers other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept, for example, the technical solutions formed by mutually replacing the above features with (but not limited to) technical features having similar functions disclosed in the present application.
Other technical features than those described in the specification are known to those skilled in the art, and are not described herein in detail in order to highlight the innovative features of the present invention.
Claims (10)
1. A laser apparatus, comprising:
a substrate;
a support disposed on the substrate;
the laser is arranged on the substrate and positioned in the bracket;
an optical element disposed on the support, the optical element including first and second oppositely disposed surfaces;
an adhesive layer disposed on the second surface;
a plano-convex lens disposed on the adhesive layer;
wherein the first surface faces the laser, a micro-lens array is arranged on the first surface, and the ratio of the curvature radius of the micro-lens in the micro-lens array to the aperture is less than 0.5;
the laser beam emitted by the laser sequentially passes through the optical element and the plano-convex lens to be emitted, and a refracted beam is formed;
wherein the illumination at the center of the refracted light beam is less than the illumination at the edge of the refracted light beam.
2. The laser apparatus of claim 1, wherein the microlenses in the microlens array are quadric surfaces of revolution, the function of the cross-section of the microlenses being:
where c denotes a curvature radius of the microlens, and k denotes a conic constant of the microlens.
3. The laser device according to claim 2, characterized in that the conic constant is-1.5 to-0.5.
4. The laser device of claim 1, wherein the plano-convex lens has a center thickness of 0.5-1.5 mm.
5. The laser device according to claim 1, wherein the conic constant of the plano-convex lens is between-1.5 and-0.5.
6. The laser apparatus according to claim 1, wherein the radius of curvature of the plano-convex lens is between-10 and-30 mm.
7. The laser device of claim 1, wherein the bonding layer has a thickness of 100 and 200 microns.
8. The laser apparatus of claim 1, wherein the angle of the center of the refracted beam is-20 ° to 20 °.
9. Laser device according to claim 1, characterized in that the angle of the refracted beam edge is 20-60 ° and-20 ° -60 °.
10. An electronic device, comprising:
a laser device for emitting a laser beam, said laser beam being irradiated on an object to form a reflected beam;
a receiving device for receiving the reflected beam;
wherein the laser apparatus comprises:
a substrate;
a support disposed on the substrate;
the laser is arranged on the substrate and positioned in the bracket;
an optical element disposed on the support, the optical element including first and second oppositely disposed surfaces;
an adhesive layer disposed on the second surface;
a plano-convex lens disposed on the adhesive layer;
wherein the first surface faces the laser, a micro-lens array is arranged on the first surface, and the ratio of the curvature radius of the micro-lens in the micro-lens array to the aperture is less than 0.5;
the laser beam emitted by the laser sequentially passes through the optical element and the plano-convex lens to be emitted to form a refracted beam, and the refracted beam is reflected by the object to form a reflected beam;
wherein the illumination at the center of the refracted light beam is less than the illumination at the edge of the refracted light beam.
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