CN210007102U

CN210007102U - Laser module capable of controlling polarization direction in programmable mode and structured light laser module

Info

Publication number: CN210007102U
Application number: CN201920905059.3U
Authority: CN
Inventors: 殷长志
Original assignee: SHANGHAI RUILIKE INFORMATION TECHNOLOGY Co Ltd
Current assignee: SHANGHAI RUILIKE INFORMATION TECHNOLOGY Co Ltd
Priority date: 2019-06-17
Filing date: 2019-06-17
Publication date: 2020-01-31
Anticipated expiration: 2029-06-17

Abstract

The utility model discloses a programmable control polarization direction's laser module and structured light laser module, relate to semiconductor laser's development, application area, it includes automatically controlled liquid crystal polarization module, laser emitter, control circuit, data interface and fixes above-mentioned content at the structure carrier, control circuit simultaneously with automatically controlled liquid crystal polarization module, laser emitter carries out control connection, be signal connection between data interface and the control circuit, laser emitter, automatically controlled liquid crystal polarization module and light path module are according to light beam propagation direction fixed mounting in proper order.

Description

Laser module capable of controlling polarization direction in programmable mode and structured light laser module

Technical Field

The utility model relates to a development, the application of semiconductor laser ware is kinds of programmable control polarization direction change's laser instrument particularly, can obtain different polarization state light beams when generating space structure light according to instruction dynamic change laser beam's polarization direction to obtain abundanter light field under the complicated reflection environment in machine vision is used.

Background

The laser application technology utilizes LD (laser diode) laser diodes to cooperate with corresponding optical elements to obtain laser spot shapes of different types, such as dots, lines, patterns and the like, which can meet the specific requirements of different application scenes, the optical rotation effect of the liquid crystal material can change the polarization direction of light, corresponding polarization angles can be obtained by applying different voltages, and light beams with different polarization properties can form different light fields in a complex reflection surface.

SUMMERY OF THE UTILITY MODEL

To the technical problem that LD drive circuit and the liquid crystal drive circuit that provide lack the integration among the background art, the utility model discloses the purpose aims at providing programmable control beam polarization direction's laser module, through installing automatically controlled liquid crystal polarization module and laser emitter integration on the structure carrier to utilize control circuit to control, control circuit includes LD drive circuit and liquid crystal drive circuit, thereby reaches the purpose with LD drive circuit and the integrated application of liquid crystal drive circuit.

In order to achieve the th objective, the utility model provides a following technical scheme:

laser modules for programmable control of light beam polarization direction comprises an electric control liquid crystal polarization module, a laser emitter, a control circuit, a data interface and a mechanical structure carrier for fixing the above components at , wherein the control circuit is simultaneously connected with the electric control liquid crystal polarization module and the laser emitter in a control manner, the data interface is in signal connection with the control circuit, and the laser emitter and the electric control liquid crystal polarization module are sequentially and fixedly installed according to the light beam propagation direction.

According to the technical scheme, the data interface receives an external control signal and transmits the external control signal to the control circuit, the control circuit outputs a driving signal to trigger the laser transmitter to emit a light beam and also outputs control orthogonal voltage to the electric control liquid crystal polarization module, the emitted light beam is modulated by the electric control liquid crystal polarization module to change the polarization direction of the light beam, and the light path module is arranged in the light beam transmission direction to control the size and the emission angle of the emitted light beam in steps.

The control circuit comprises an LD driving module, a liquid crystal driving module and an MCU control module; the MCU control module is in signal connection with the LD drive module and the liquid crystal drive module, the LD drive module is electrically connected with the laser transmitter, the liquid crystal drive module is electrically connected with the electric control liquid crystal polarization mode, and the MCU control module is in signal connection with the data interface and receives and responds to external signals.

Through above-mentioned technical scheme, can realize that the circuit integrates, miniaturization and easily installation, the user easily quick control light beam polarization state changes to through changing light beam polarization state under the complicated plane of reflection scene, obtain better light beam and shine feedback effect.

The utility model discloses the second purpose aims at providing programmable control light beam polarization direction's structured light laser module, through having increased the light path module, with laser emitter, automatically controlled liquid crystal polarization module, light path module according to light beam propagation direction fixed mounting in proper order to the carrier to let the user according to different demands, change different structured light subassemblies.

In order to achieve the second objective, the present invention provides the following technical solution:

the light path module is arranged on the carrier in a detachable and fixed mode, wherein the light path module is matched with the electric control liquid crystal polarization module to carry out various modulation and transformation on the light beam, and the installation sequence in the light path can be crossed.

Through above-mentioned technical scheme, can let the user according to different demands, change different structured light subassemblies, for example DOE, Baowell prism, or the different lens module of specification to constitute the structured light laser ware of different focuses, different form faculas, the polarization direction who works as these laser beam changes, can obtain different visual results in polarization camera.

Drawings

FIG. 1: the hardware logic module schematic diagram describes the relationship constitution between the hardware circuit modules;

FIG. 2: a laser transmitter driving module circuit schematic diagram;

FIG. 3: a schematic circuit diagram of the electric control liquid crystal driving module;

FIG. 4: a laser emitter of the LD array;

FIG. 5: an electrically controlled liquid crystal polarization module of a liquid crystal pixel array structure;

FIG. 6: a structured light laser module.

Reference numerals: 1. a laser emitter drive module; 2. an electric control liquid crystal driving module; 3. an MCU control unit; 4. a laser transmitter; 5. an electric control liquid crystal module; 6. a level signal input/output interface; 7. an upper computer communication interface; 8. a data interface; 11. a circuit board; 12. a laser transmitter; 13. an electrically controlled liquid crystal polarization module; 14. a data interface; 15. the lens and the auxiliary light path element group in the light path module; 16. a structured light DOE; 17. and (3) a structural carrier.

Detailed Description

The present invention will be described in further detail in with reference to examples and drawings, but the present invention is not limited to these examples.

As can be seen from FIG. 1, the present invention includes two parts: hardware design and software design. The laser emitter driving module and the electric control liquid crystal driving module are integrated, the matching working relation between the laser emitter driving module and the electric control liquid crystal driving module is defined by writing software in the MCU control unit 3, and the integrated data interface 8 receives an external control signal to realize programmable control.

Referring to fig. 1, it can be seen that a logic diagram of hardware design and a logic diagram of hardware configuration are shown, referring to fig. 2, it is a schematic circuit diagram of a laser transmitter driving module, referring to fig. 3, it is a schematic circuit diagram of an electrically controlled liquid crystal driving module, and hardware is integrated into circuit PCBs.

Referring to fig. 1, the LD driving module 1 is responsible for driving the laser diode to work, the laser emitter 4 is a laser diode, referring to fig. 4, it is a single or multiple arrays, connected to the PCB, and receives the current/voltage signal from the LD driving module 1 to turn off or emit the light beams with different powers, the electrically controlled liquid crystal driving module 2 outputs the orthogonal driving voltage, and loads the voltage on the electrically controlled liquid crystal module 5, referring to fig. 5, the electrically controlled liquid crystal polarization module 5 is a single-pixel or multi-pixel liquid crystal cell structure, wherein the liquid crystal material can change the polarization direction of the incident light with the voltage change, and the electrically controlled liquid crystal polarization module 5 is connected to the hardware circuit board through electrical connection.

The liquid crystal box utilizes the optical rotation property of liquid crystal molecules, can be of a reflection type or a transmission type, can be additionally provided with a polarizer (a static linear polarization element, a vector polarization element and the like) on an incident plane, has the thickness of the liquid crystal box not more than 3um, has the response time not more than 3 ms., and can be of a single-pixel structure or an M-N multi-pixel structure as shown in figure 5.

The utility model discloses a with two module integrations, the design core of PCB has carried out synchronous connection with the work of two modules through the MCU unit, and this kind of synchronous relation is realized by the MCU unit, and not only the electricity is connected, and step more says, its work relies on the Firmware definition content that realizes control logic.

Combine fig. 1, MCU unit 3 mainly accomplishes control logic and data processing, does the utility model discloses a core carrier, MCU unit 3 can be the singlechip or the powerful embedded system chip of function constitutes the processor module, through defining built-in Firmware, provides data processing logic and programming interface.

The utility model discloses a data interface is by level signal input/output interface 6 and host computer communication interface 7, and data interface is the data channel who accepts external control signal, its specification definition is defined and explained by MCU unit 3, level signal input/output interface 6 is the TTL passageway of standard or the GPIO passageway that accords with the standard generally, and its definition is accomplished and is carried out in MCU unit 3, when level signal input/output interface 6 is pencil structure or aviation plug interface, merge power input interface and play the power supply for whole device at .

The upper computer communication interface 7 is a serial port or a USB HID interface or other interfaces and is responsible for communicating with an upper computer and receiving various instruction information, specification definition and realization of the instructions are completed by the MCU unit 3, and the MCU unit 3 is responsible for responding and controlling related modules to work.

The above implementation steps describe basic hardware components, and further , the design of the liquid crystal polarization direction control proposed by the present invention has its specific control method when meeting the use requirement, and the method is implemented by combining software and hardware, where the software is a code implemented in hardware, and is itself part of hardware, and appears as an instruction set and a trigger signal to the user.

The software module (Firmware) mainly functions to realize a communication protocol, analyze input and output level signals, respond to instruction information and realize time synchronization logic. FIG. 4 depicts software implemented logic, the objects processed by the software including: voltage signal on liquid crystal, drive signal of LD and time sequence relation. The manner of processing is embodied externally as instruction set and trigger signal specifications.

The instruction set establishes a standard hardware interface and a data specification by using a standard communication protocol such as RS232 or USB; based on the instruction characteristics of the MCU, the instruction set comprises an object, a time point and an action assignment; the utility model provides a change of liquid crystal polarization angle and laser brightness on instruction set definition polarization state deflection angle value and liquid crystal drive voltage's mapping relation, LD drive voltage and laser brightness's corresponding relation, time axis.

The definition of the above instruction set can be composed of part being action class, part being parameter class, further step, action class mainly means that each instruction represents group of actions, the laser will execute corresponding change according to the instruction content, and the parameter class mainly means that each instruction represents the setting of the control parameter of the laser, the parameter includes the time relation of polarization angle, brightness, polarization change and brightness change, such as delay, repetition frequency and frequency, and the like, after setting the parameter, the control action is executed according to the parameter, wherein the time relation is processed by the timing controller, the hardware clock device generates the reference clock signal, the actions sequentially occur according to the time sequence, the instruction form can be but not limited to instruction name + instruction object + instruction assignment, for example, ANG 45C 410, ANG represents that the polarization angle change 45 represents the clockwise change 45 ° C4 represents the continuous change 4 times, that is 45 °, 90 °, 135 °, 180 ° continuous change four times, and 10 represents the change time interval 10 ms.

The hardware internal programming of the instruction set further includes response logic to the trigger signal. For example, a GPIO interface directly converts a level signal into instruction content, and directly controls the level signal through a TTL level or an optocoupler. Through programming in the MCU unit, the hardware can identify the trigger signal, so that the signal source of the programmable control can come from a PLC control module or a grating ruler module and can also come from the communication control of an upper computer.

The basic laser module capable of controlling the polarization angle of the light beam in a programmable manner is completed in the steps, in order to form lasers or structured light lasers meeting the machine vision requirements in steps, a light path module is additionally arranged, the light path module comprises a lens group, a Powell prism, a DOE and the like, the main purpose is to change the divergence angle of the light beam, the focal characteristics or the light spot shape, the light path modules are sequentially installed and connected according to the functional characteristics of the light beam propagation direction, and detachable connection such as threaded connection, plug connection and the like is adopted.

As can be seen from the above description, the above description constitutes the specific implementation steps of the present invention, the above-mentioned functional module finally integrates the circuit board 11, the laser emitter 12, the electrically controlled liquid crystal polarization module 13, the data interface 14, the optical path module 15, the structured light DOE16 and other parts by setting the structural carrier 17, and constitutes complete lasers with variable polarization direction that can meet the requirements of the measurement field.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

The laser module capable of controlling the polarization direction of light beams in a programmable way is characterized by comprising an electric control liquid crystal polarization module, a laser emitter, a control circuit, a data interface and a structural carrier for fixing the electric control liquid crystal polarization module and the laser emitter at , wherein the laser emitter and the electric control liquid crystal polarization module are fixedly installed in sequence according to the propagation direction of the light beams;

the data interface is in signal connection with the control circuit, the control circuit is used for receiving external input signals, and the control circuit is respectively in control connection with the electric control liquid crystal polarization module and the laser transmitter so as to control the electric control liquid crystal polarization module and the laser transmitter.
2. The laser module capable of programmably controlling the polarization direction of light beam according to claim 1, wherein the control circuit comprises an LD driver module, a liquid crystal driver module, and an MCU control module, the MCU control module is in signal connection with the LD driver module and the liquid crystal driver module, the LD driver module is electrically connected with the laser transmitter, the liquid crystal driver module is electrically connected with the electrically controlled liquid crystal polarization mode, and the MCU control module is in signal connection with the data interface for receiving and responding to external signals.
3. The laser module for programmable control of polarization direction of light beam as claimed in claim 1, wherein the MUC control module has Firmware therein, which defines sets of instruction set and trigger signal specifications, i.e. standard programming API specifications for users, which describe the signal timing relationship between the LD driving module and the liquid crystal driving module, and the MCU control unit.
4, structured light laser modules capable of controlling the polarization direction of light beams in a programmable manner, characterized in that laser modules capable of controlling the polarization direction of light beams in a programmable manner are based on any in claims 1-3, and further comprise a light path module, wherein the laser emitter, the electric control liquid crystal polarization module and the light path module are fixedly arranged on the structural carrier in sequence according to the propagation direction of the light beams.
5. The kind of programmable beam polarization direction control structured light laser module of claim 4, wherein the optical path module is detachably mounted on the structure carrier.