CN108988121B

CN108988121B - Optical device and apparatus

Info

Publication number: CN108988121B
Application number: CN201810829128.7A
Authority: CN
Inventors: 郝宁
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2018-07-25
Filing date: 2018-07-25
Publication date: 2020-01-07
Anticipated expiration: 2038-07-25
Also published as: CN108988121A

Abstract

The present disclosure relates to an optical device and apparatus. The optical device includes: the device comprises a surface emitting laser, an impedance detection circuit, a controller and an optical component positioned on a light-emitting path of the surface emitting laser; the optical assembly comprises a support and a Diffractive Optical Element (DOE) positioned in the support, wherein paired conductive contacts are arranged on the inner side wall of the support, a conductive film formed by a preset material is attached to the light emergent surface of the DOE, and the edge of the conductive film is connected with the paired conductive contacts through a conductive substance; the impedance detection circuit is respectively connected with the paired conductive contacts and the controller; the controller is also connected with the surface emitting laser, and the controller is used for controlling the surface emitting laser to be closed when the impedance detected by the impedance detection circuit is not in a preset range. The surface emitting laser device has the advantages that the situation that laser emitted by the surface emitting laser device is not uniformly dispersed due to DOE position movement or damage is avoided, single-point energy is too high, and the human eyes are injured irreversibly, so that the safety is improved.

Description

Optical device and apparatus

Technical Field

The present disclosure relates to the field of optical technology, and more particularly, to an optical apparatus and device.

Background

Currently, more and more devices support face recognition functions based on surface emitting lasers.

In the related art, since the laser has a high energy, there is a risk that the homogenized laser is not scattered to directly irradiate the human eye. Therefore, the surface emitting laser generally needs to combine with a Diffractive Optical Element (DOE) to scatter the collected laser light and emit the scattered laser light as a uniform surface light source. The single-point intensity of the laser after the DOE is scattered is harmless, but the DOE has the risk of position movement or damage in the use process of the equipment, once the DOE is damaged or the position is moved, the laser is not uniformly dispersed, and the single-point energy is too high to cause unrecoverable damage to human eyes.

Disclosure of Invention

To overcome the problems in the related art, the present disclosure provides an optical device and apparatus.

According to a first aspect of embodiments of the present disclosure, there is provided an optical apparatus comprising: the device comprises a surface emitting laser, an impedance detection circuit, a controller and an optical component positioned on a light-emitting path of the surface emitting laser; wherein the content of the first and second substances,

the optical component comprises a bracket and a Diffractive Optical Element (DOE) positioned in the bracket, wherein the inner side wall of the bracket is provided with a pair of conductive contacts, the light-emitting surface of the DOE is attached with a conductive film formed by a preset material, and the edge of the conductive film is connected with the pair of conductive contacts through a conductive substance;

the impedance detection circuit is respectively connected with the paired conductive contacts and the controller;

the controller is also connected with the surface emitting laser, and is used for controlling the surface emitting laser to be turned off when the impedance detected by the impedance detection circuit is not in a preset range.

In one possible implementation design, a plurality of pairs of conductive contacts are arranged on the inner side wall of the support, a plurality of conductive films are attached to the light-emitting surface of the DOE, and the edge of each conductive film is connected with the corresponding pair of conductive contacts through the conductive substance.

In one possible design, an insulating gap is provided between the conductive films.

In one possible implementation design, the plurality of conductive films are spread over the light exit surface of the DOE.

In one possible implementation, the pairs of conductive contacts are distributed symmetrically.

In one possible implementation design, the edge of the conductive film that connects to the conductive contact extends to the edge of the DOE.

In one possible implementation, the controller is further configured to control the surface emitting laser to operate continuously when the impedance detected by the impedance detecting circuit is within a preset range.

In one possible implementation, the edges of the conductive film are connected to the pairs of conductive contacts by conductive material bonding.

In one possible implementation, the conductive contacts are contacts formed from conductive foam.

In one possible design, the predetermined material is Indium Tin Oxide (ITO).

In one possible design, the predetermined material is a material that is transparent and fragile.

In one possible implementation design, the surface emitting laser is a vertical cavity surface emitting laser VCSEL.

According to a second aspect of embodiments of the present disclosure, there is provided an apparatus comprising an optical device; the optical device includes: the device comprises a surface emitting laser, an impedance detection circuit, a controller and an optical component positioned on a light-emitting path of the surface emitting laser; wherein the content of the first and second substances,

In one possible design, the predetermined material is Indium Tin Oxide (ITO).

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: the inner side wall of the bracket is provided with paired conductive contacts, the light-emitting surface of the DOE is adhered with a conductive film formed by a preset material, the edge of the conductive film is connected with the paired conductive contacts through a conductive substance, the impedance detection circuit is respectively connected with the paired conductive contacts and is used for detecting the impedance between the conductive film and the conductive contacts, the controller is respectively connected with the impedance detection circuit and the surface-emitting laser and is used for controlling the surface-emitting laser to be turned off when the impedance detected by the impedance detection circuit is not in a preset range, the impedance between the conductive contact and the conductive film can be changed due to the movement or damage of the position of the DOE, and the surface-emitting laser is controlled to be turned off when the impedance between the conductive contact and the conductive film is not in the preset range, so that the situation that the laser emitted by the surface-emitting laser is not uniformly dispersed due to the movement or damage of the position of the DOE can be avoided, the single-point energy is too high, so that the human eyes are irreparably injured, and the safety is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

FIG. 1 is a block diagram one of an optical apparatus shown in accordance with an exemplary embodiment;

FIG. 2 is a block diagram two of an optical device shown in accordance with an exemplary embodiment;

FIG. 3 is a block diagram of an optical device shown in accordance with another exemplary embodiment;

FIG. 4 is a block diagram of an optical apparatus shown in accordance with yet another exemplary embodiment;

FIG. 5 is a block diagram of an optical apparatus shown in accordance with yet another exemplary embodiment;

FIG. 6 is a block diagram of an optical device shown in accordance with yet another exemplary embodiment;

FIG. 7 is a block diagram of an optical device shown in accordance with yet another exemplary embodiment;

fig. 8 is a block diagram illustrating an apparatus 800 according to an example embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.

Fig. 1 is a first block diagram of an optical apparatus according to an exemplary embodiment, and fig. 2 is a second block diagram of an optical apparatus according to an exemplary embodiment. As shown in fig. 1 and 2, the optical apparatus of the present embodiment may include: a surface-emitting laser (not shown), an impedance detection circuit 11, a controller 12, and an optical component located on an optical path of the surface-emitting laser; the optical assembly comprises a bracket 13 and a DOE14 located inside the bracket 13, wherein a pair of conductive contacts 131 is arranged on the inner side wall of the bracket 13, a conductive film 141 made of a preset material is attached to the light exit surface of the DOE14, and the edge of the conductive film 141 is connected with the pair of conductive contacts 131 through a conductive substance; the impedance detection circuit 11 is connected to the pair of conductive contacts 131 and the controller 12; the controller 12 is also connected to the surface emitting laser, and the controller 12 is configured to control the surface emitting laser to turn off when the impedance detected by the impedance detecting circuit 11 is not within a preset range.

When the impedance detected by the impedance detection circuit 11 is not within the preset range, the DOE position may be moved or damaged; when the impedance detected by the impedance detection circuit 11 is within a preset range, it can indicate that the DOE position is not moved and is not broken. That is, the positional shift and breakage of the DOE can be detected by the impedance detection circuit 11 detecting the impedance between the conductive film 141 and the conductive contact 131. Alternatively, the predetermined range may be determined experimentally.

Specifically, after the conductive film 141 attached to the light exit surface of the DOE14 and the conductive contact 131 of the bracket 13 are connected based on the conductive substance, the impedance between the conductive film 141 and the conductive contact 131 can be detected by the impedance detection circuit 11. If DOE14 has no position shift or breakage, the impedance detected by impedance detection circuit 11 remains within a certain range (i.e., a preset range), and at this time DOE14 can be considered normal, i.e., DOE14 has no position shift or breakage. Once the DOE14 is moved or broken, the impedance between the conductive film 141 and the conductive contact 131 is affected, and a large change in impedance between the conductive film 141 and the conductive contact 131 is caused, and the impedance detection circuit 11 detects the large change in impedance, and the controller 12 may turn off the surface-emitting laser, so that the surface-emitting laser no longer emits laser light.

It should be noted that when the DOE14 is moved, the relative position between the conductive contact 131 and the conductive film may be changed, so as to cause a change in impedance between the conductive contact 131 and the conductive film 141. When the DOE14 is broken, damage (e.g., breakage) of the conductive film 141 may be caused, which in turn causes a change in the conductive characteristics of the conductive film 141, thereby causing a change in the impedance between the conductive contact 131 and the conductive film 141. Specifically, the positional shift or breakage of the DOE14 may cause an increase in impedance between the conductive contact 131 and the conductive film 141.

Optionally, the Surface Emitting Laser may be a Vertical Cavity Surface Emitting Laser (VCSEL).

Alternatively, the impedance detection circuit 11 may be any circuit capable of detecting impedance. Specifically, the impedance detecting circuit 11 may form a closed-loop circuit with the pair of conductive contacts 131, and is used for detecting the impedance between the conductive film 141 and the conductive contacts 131.

Wherein the controller 12 may be used to control the surface-emitting laser to be off. It should be noted that the present disclosure is not limited to the specific manner in which the controller 12 controls the emitting laser to be turned off. Alternatively, the control surface emitting laser may be turned off by outputting a control signal. For example, the control signal may be a control signal for controlling the power supply of the cut surface emitting laser, for example.

Further optionally, the impedance detection circuit 11 may be further configured to determine whether the detected impedance is within a preset range; or, the controller 12 may be further configured to determine whether the impedance detected by the impedance detecting circuit 11 is within a preset range; alternatively, a judging circuit may be connected between the impedance detecting circuit 11 and the control circuit 12, and is configured to judge whether the impedance detected by the impedance detecting circuit 11 is within a preset range.

Optionally, in order to enable the conductive property of the conductive film to sensitively reflect the damage of the DOE and not cause a large influence on the intensity of light, the predetermined material may be a transparent and fragile material. Specifically, the predetermined material may be a material having an electrical conductivity greater than a predetermined electrical conductivity and a mechanical stress greater than or equal to a predetermined stress. Wherein the predetermined conductivity and the predetermined stress may be determined experimentally. The predetermined material may be Indium Tin Oxide (ITO), for example.

The present disclosure is not limited to a specific manner of forming the conductive film 141 on the light exit surface of the DOE 14. Alternatively, a predetermined material may be attached to the light exit surface of the DOE14 by evaporation to form the conductive film 141.

Alternatively, in order to achieve better connection between the edge of the conductive film 141 and the conductive contact 131, the conductive contact may be a contact formed by a conductive substance having a certain elasticity. Further alternatively, the conductive contacts may be contacts formed from conductive foam. It should be noted that the shape and size of the conductive contact 131 are not limited in the present disclosure. For example, the conductive contacts 131 may be rectangular.

It should be noted that the disclosure is not limited to a specific process for connecting the edge of the conductive film 141 and the conductive contact 131 by a conductive substance. For example, the edges of the conductive film 141 and the pair of conductive contacts 131 are connected by conductive substance soldering (bonding). Here, the conductive material may be, for example, Anisotropic Conductive Films (ACFs).

Alternatively, in order to facilitate the connection of the edge of the conductive film 141 and the conductive contact 131 through a predetermined material, as shown in fig. 1, the edge of the conductive film 141 connected to the conductive contact 131 may extend to the edge of the DOE 14.

Optionally, when the impedance detected by the impedance detecting circuit 11 is within a preset range, the controller 12 may not perform any operation; or, the controller 12 is further configured to control the surface emitting laser to continuously operate when the impedance detected by the impedance detecting circuit 11 is within a preset range, so that the emitting laser can continuously emit laser light, which is convenient for face recognition.

It should be noted that, in fig. 1, the conductive film 141 is located at the lower right side, and the light exit surface of the DOE14 is not covered with the conductive film 141, alternatively, the conductive film 141 may be located at other positions of the light exit surface of the DOE 14. Alternatively, in order to improve the detection sensitivity to positional displacement and breakage of the DOE14, the conductive film 141 may be spread over the light exit surface of the DOE 14. In fig. 1, the shape of the conductive module 141 is a square, and alternatively, the conductive film may also have other shapes, such as a rectangle, a diamond, and the like, which is not limited in this disclosure.

In the optical device provided by this embodiment, paired conductive contacts are disposed on an inner side wall of the bracket, a conductive thin film formed by a predetermined material is attached to a light exit surface of the DOE, an edge of the conductive thin film is connected to the paired conductive contacts through a conductive material, the impedance detection circuit is connected to the paired conductive contacts respectively, and is configured to detect impedance between the conductive thin film and the conductive contacts, the controller is connected to the impedance detection circuit and the surface-emitting laser respectively, and is configured to control the surface-emitting laser to turn off when the impedance detected by the impedance detection circuit is not within a predetermined range, because the DOE position is moved or damaged, the impedance between the conductive contact and the conductive thin film is changed, and when the impedance between the conductive contact and the conductive thin film is not within the predetermined range, the surface-emitting laser is controlled to turn off, which can be avoided that laser emitted by the surface-emitting laser is not uniformly dispersed due to the DOE position movement or damage, the single-point energy is too high, so that the human eyes are irreparably injured, and the safety is improved.

Optionally, in order to improve the detection sensitivity for the positional displacement and breakage of the DOE14, a plurality of pairs of conductive contacts 131 are disposed on the inner side wall of the bracket 13, a plurality of conductive films 141 are attached to the light exit surface of the DOE14, and an edge of each conductive film 141 is connected to a corresponding pair of conductive contacts 131 through the conductive substance. Alternatively, the shapes of the plurality of conductive films 141 may be completely the same, partially the same, or completely different, and the present disclosure does not limit this.

Alternatively, the edge of each conductive film 141 may be connected to the corresponding pairs of the conductive contacts 131 through the conductive material. Here, the connection between the edge of each conductive film 141 and the corresponding pairs of the conductive contacts 131 through the conductive substance may further improve the sensitivity, but the cost is more and the design is more complicated.

It should be noted that, when a plurality of pairs of the conductive contacts 131 are provided, the impedance detecting circuit 11 may constitute an independent closed-loop circuit with each pair of the conductive contacts 131 for detecting the impedance between each pair of the conductive contacts 131 and the conductive film 141.

Further optionally, in order to avoid the problem that the impedance detected by the impedance detection circuit 11 fails to reflect the DOE position movement or breakage due to the mutual influence between different conductive films, or the DOE position movement or breakage is erroneously detected, an insulation gap may be provided between the conductive films 141.

Optionally, in order to further improve the detection sensitivity to the positional shift and breakage of the DOE14, the plurality of conductive films 141 are spread over the light exit surface of the DOE 14.

Optionally, the pairs of conductive contacts are symmetrically distributed.

On the basis of the above embodiment, the shape of the conductive film is square, the inner side wall of the bracket is provided with 8 conductive contacts, 4 conductive films are attached to the light-emitting surface of the DOE, the 4 conductive films are fully distributed on the light-emitting surface of the DOE, and the edge of the conductive film extends to the edge of the DOE. As shown in fig. 3, the 8 conductive contacts are a, b, c, d, e, f, g and h, respectively, wherein a and b may be a pair of conductive contacts, and are connected with the edge of the conductive film a through a conductive substance; c and d can be a pair of conductive contacts connected with the edge of the conductive film B through a conductive substance; e and f can be a pair of conductive contacts connected with the edge of the conductive film C through a conductive substance; g and h may be a pair of conductive contacts connected to the edge of the conductive film D through a conductive substance.

It should be noted that only the impedance detection circuit is shown in fig. 3 as being connected to the paired conductive contacts a and b, respectively, and it is understood that in practical implementation, the impedance detection circuit needs to be connected to each of the 4 paired conductive contacts, respectively, for detecting the impedance between each pair of conductive contacts and the conductive film.

As shown in fig. 3, an insulating gap 142 may be provided between the conductive films 141.

On the basis of the above embodiment, the shape of the conductive film is rectangular, 4 conductive contacts are arranged on the inner side wall of the support, 2 conductive films are attached to the light-emitting surface of the DOE, the 2 conductive films are fully distributed on the light-emitting surface of the DOE, and the edge of each conductive film extends to the edge of the DOE. As shown in fig. 4, the 4 conductive contacts are a, b, c and d, wherein a and b may be a pair of conductive contacts, and are connected with the edge of the conductive film a through a conductive substance; c and d may be a pair of conductive contacts connected to the edge of the conductive film B through a conductive substance.

It should be noted that only the impedance detection circuit is shown in fig. 4 as being connected to the paired conductive contacts a and b, respectively, and it is understood that, in a specific implementation, the impedance detection circuit needs to be connected to each of the 2 paired conductive contacts, respectively, for detecting the impedance between each pair of conductive contacts and the conductive film.

As shown in fig. 4, an insulating gap 142 may be provided between the conductive films 141.

On the basis of the above embodiment, the shape of the conductive film is rectangular, the inner side wall of the support is provided with 6 conductive contacts, 3 conductive films are attached to the light-emitting surface of the DOE, the 3 conductive films are fully distributed on the light-emitting surface of the DOE, and the edge of each conductive film extends to the edge of the DOE. As shown in fig. 5, the 6 conductive contacts are a, b, c, d, e and f, respectively, wherein a and b may be a pair of conductive contacts connected with the edge of the conductive film a through a conductive substance; c and d can be a pair of conductive contacts connected with the edge of the conductive film B through a conductive substance; e and f may be a pair of conductive contacts connected to the edge of the conductive film C by a conductive substance.

It should be noted that fig. 5 only shows the impedance detection circuit connected to the paired conductive contacts a and b, respectively, and it is understood that, in a specific implementation, the impedance detection circuit needs to be connected to each paired conductive contact of the 3 paired conductive contacts, respectively, for detecting the impedance between each paired conductive contact and the conductive film.

As shown in fig. 5, an insulating gap 142 may be provided between the conductive films 141.

On the basis of the above embodiment, the shape of the conductive film is triangular, the inner side wall of the bracket is provided with 4 conductive contacts, 2 conductive films are attached to the light-emitting surface of the DOE, the 2 conductive films are fully distributed on the light-emitting surface of the DOE, and the edge of the conductive film extends to the edge of the DOE. As shown in fig. 6, the 4 conductive contacts are a, b, c and d, wherein a and b may be a pair of conductive contacts, and are connected with the edge of the conductive film a through a conductive substance; c and d may be a pair of conductive contacts connected to the edge of the conductive film B through a conductive substance.

It should be noted that only the impedance detection circuit is shown in fig. 6 to be connected to the paired conductive contacts a and b, respectively, and it is understood that, in a specific implementation, the impedance detection circuit needs to be connected to each of the 2 paired conductive contacts, respectively, for detecting the impedance between each pair of conductive contacts and the conductive film.

As shown in fig. 6, an insulating gap 142 may be provided between the conductive films 141.

On the basis of the above embodiment, the shape of the conductive film is triangular, the inner side wall of the bracket is provided with 8 conductive contacts, 4 conductive films are attached to the light-emitting surface of the DOE, the 4 conductive films are fully distributed on the light-emitting surface of the DOE, and the edge of the conductive film extends to the edge of the DOE. As shown in fig. 7, the 8 conductive contacts are a, b, c, d, e, f, g and h, wherein a and b can be a pair of conductive contacts, and are connected with the edge of the conductive film a through a conductive substance; c and d can be a pair of conductive contacts connected with the edge of the conductive film B through a conductive substance; e and f can be a pair of conductive contacts connected with the edge of the conductive film C through a conductive substance; g and h may be a pair of conductive contacts connected to the edge of the conductive film D through a conductive substance.

It should be noted that only the impedance detection circuit is shown in fig. 7 to be connected to the paired conductive contacts a and b, respectively, and it is understood that, in a specific implementation, the impedance detection circuit needs to be connected to each of the 4 paired conductive contacts, respectively, for detecting the impedance between each pair of conductive contacts and the conductive film.

As shown in fig. 7, an insulating gap 142 may be provided between the conductive films 141.

Fig. 8 is a block diagram illustrating an apparatus 800 according to an example embodiment. For example, the device 800 may be a mobile phone, a computer, a digital broadcast device, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, and the like.

Referring to fig. 8, device 800 may include one or more of the following components: processing component 802, memory 804, power component 806, multimedia component 808, audio component 810, input/output (I/O) interface 812, sensor component 814, and communication component 816.

The processing component 802 generally controls overall operation of the device 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 802 may include one or more processors 820 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 802 can include one or more modules that facilitate interaction between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.

The memory 804 is configured to store various types of data to support operation at the device 800. Examples of such data include instructions for any application or method operating on device 800, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 804 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

The power component 806 provides power to the various components of the device 800. The power components 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the device 800.

The multimedia component 808 includes a screen that provides an output interface between the device 800 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front facing camera and/or a rear facing camera. The front-facing camera and/or the rear-facing camera may receive external multimedia data when the device 800 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive external audio signals when the device 800 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.

The I/O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

The sensor assembly 814 includes one or more sensors for providing various aspects of state assessment for the device 800. For example, the sensor assembly 814 may detect the open/closed state of the device 800, the relative positioning of the components, such as a display and keypad of the device 800, the sensor assembly 814 may also detect a change in the position of the device 800 or a component of the device 800, the presence or absence of user contact with the device 800, orientation or acceleration/deceleration of the device 800, and a change in the temperature of the device 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

Communications component 816 is configured to facilitate communications between device 800 and other devices in a wired or wireless manner. The device 800 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the device 800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components.

In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions, such as the memory 804 including instructions, is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

The apparatus 800 may include, among other things, an optical device. The optical device includes:

the optical device includes: the device comprises a surface emitting laser, an impedance detection circuit, a controller and an optical component positioned on a light-emitting path of the surface emitting laser; wherein the content of the first and second substances,

In one possible design, the predetermined material is Indium Tin Oxide (ITO).

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims

1. An optical device, comprising: the device comprises a surface emitting laser, an impedance detection circuit, a controller and an optical component positioned on a light-emitting path of the surface emitting laser; wherein the content of the first and second substances,

the optical assembly comprises a bracket and a Diffractive Optical Element (DOE) positioned in the bracket, wherein a pair of conductive contacts are arranged on the inner side wall of the bracket, a conductive film formed by a preset material is attached to the light emergent surface of the DOE, and the edge of the conductive film is connected with the pair of conductive contacts through a conductive substance;

the controller is also connected with the surface emitting laser, and the controller is used for controlling the surface emitting laser to be closed when the impedance detected by the impedance detection circuit is not in a preset range.

2. The optical device according to claim 1, wherein a plurality of pairs of conductive contacts are disposed on the inner side wall of the bracket, a plurality of conductive films are attached to the light exit surface of the DOE, and an edge of each conductive film is connected to a corresponding pair of the pairs of the conductive contacts through the conductive material.

3. The optical device of claim 2, wherein an insulating gap is disposed between each of the conductive films.

4. The optical device of claim 2, wherein the plurality of conductive films are interspersed across the DOE's light exit surface.

5. The optical device of claim 2, wherein the plurality of pairs of electrically conductive contacts are symmetrically distributed.

6. The optical device of claim 1, wherein the edge of the conductive film connected to the conductive contact extends to the edge of the DOE.

7. The optical device according to any one of claims 1 to 6, wherein the controller is further configured to control the surface emitting laser to operate continuously when the impedance detected by the impedance detection circuit is within a preset range.

8. An optical device as claimed in any one of claims 1 to 6, wherein the edges of the conductive film are connected to the pairs of conductive contacts by means of conductive substance solder bonding.

9. An optical device as claimed in any one of claims 1 to 6, characterized in that the electrically conductive contact is a contact formed by a conductive foam.

10. The optical device according to any one of claims 1 to 6, wherein the predetermined material is Indium Tin Oxide (ITO).

11. An optical device as claimed in any one of claims 1 to 6, characterized in that the predetermined material is a material which is light-transmissive and brittle.

12. The optical device according to any of claims 1 to 6, characterized in that the surface emitting laser is a vertical cavity surface emitting laser, VCSEL.

13. An optical device, characterized in that the device comprises an optical apparatus according to any one of claims 1-12.