CN208654318U - A kind of solid state scanning laser radar based on LCOS technology - Google Patents
A kind of solid state scanning laser radar based on LCOS technology Download PDFInfo
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- CN208654318U CN208654318U CN201821320471.0U CN201821320471U CN208654318U CN 208654318 U CN208654318 U CN 208654318U CN 201821320471 U CN201821320471 U CN 201821320471U CN 208654318 U CN208654318 U CN 208654318U
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- laser radar
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- liquid crystal
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- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The utility model belongs to laser radar technique field, discloses a kind of solid state scanning laser radar based on LCOS technology, including emitting laser, transmitting optical element and LCOS device；The emitted optical element collimation output of the detection optical signal that the emitting laser issues is incident to the LCOS device；The LCOS device includes that substrate, glass cover-plate and perfusion liquid crystal, the substrate and glass cover-plate connect into a cavity box body by micro- glass bar, the perfusion liquid crystal are arranged in the cavity box body；Effective plane of the LCOS device is made of the pixel of Two dimensional Distribution.The utility model solid state scanning laser radar realizes the movement-less part scanning of laser acquisition light beam, solves a series of problems existing for Current mechanical scanning mode laser radar, further widens the application field of laser radar.
Description
Technical field
The utility model belongs to laser radar technique field, and in particular to one kind is based on LCOS (liquid crystal on silicon, Liquid
Crystal On Silicon, abbreviation LCOS) technology solid state scanning laser radar.
Background technique
There are mainly two types of scanning modes for laser radar, are mechanical scanning mode and non-mechanical scanning mode respectively.Machinery is swept
Retouch the advantages that mode is due to technology maturation, flexible design, simple and low in cost structure, it has also become the mainstream of present laser radar
Light beam scanning mode is successfully applied in various types of laser radar products, and has realized batch production and sale.But it is mechanical
For scanning mode there is also a series of problem, size is larger, and scanning speed is slow, and moving component easily influences long-term reliability.It is above-mentioned
Problem limits high-volume of the laser radar in the fields such as automatic Pilot or industrial detection and promotes and applies.
Utility model content
In order to solve the above problems existing in the present technology, the utility model aim is to provide a kind of based on LCOS technology
Solid state scanning laser radar, realize laser acquisition light beam movement-less part scanning, solve Current mechanical scanning mode laser
A series of problems existing for radar further widens the application field of laser radar.
The technology employed by the present utility model is
A kind of solid state scanning laser radar based on LCOS technology includes emitting laser, transmitting optical element and LCOS device
Part；
The detection optical signal that the emitting laser issues is incident to described through transmitting optical element collimation output
LCOS device；
The LCOS device includes substrate, glass cover-plate and perfusion liquid crystal, and the substrate and glass cover-plate pass through micro- glass
Stick connects into a cavity box body, and the perfusion liquid crystal is arranged in the cavity box body；
Effective plane of the LCOS device is made of the pixel of Two dimensional Distribution.
Further, the substrate is CMOS IC chip, and the glass cover-plate is the glass for being coated with transparent electrode
Cover board.
Further, the transmitting optical element is diversing lens.
Further, the diversing lens are non-spherical lens.
Further, the perfusion liquid crystal is the perfusion liquid crystal of high refractive index.
The utility model has the following beneficial effects:
On the basis of existing machinery scanning mode, mechanical scanner is replaced with into LCOS optical beam scanner part, LCOS
The position phase that can control incident beam flexibly changes the phase change angle of light beam according to the demand of light beam scanning angle, realizes
The angle change continuous scanning of light beam, in addition, single mechanical scanner is only capable of providing one-dimensional angle rotation, if you need to realize two dimension
Angle rotation, needs to install the mechanical scanner of another dimension again on single mechanical scanner, substantially increases laser
The complexity of radar system, relative to mechanical scanning mode, LCOS solid state scanning mode can also realize two-dimensional scanning, individually
Any phase change on two-dimensional directional can be achieved in LCOS optical beam scanner part, i.e., controllable scanning light beam is at the angle of two-dimensional directional
Spend continuous rotation.
Detailed description of the invention
Fig. 1 is the light beam scanning theory schematic diagram of the solid state scanning laser radar based on LCOS technology of the utility model.
Fig. 2 is the planar structure schematic diagram of the LCOS device of the utility model.
Fig. 3 is effect picture when all pixels on the LCOS device to the utility model apply identical voltage.
Fig. 4 is light incidence and the exit direction when applying the voltage of small phase difference to the LCOS device of the utility model
(positive direction) schematic diagram.
Fig. 5 is light incidence and the exit direction when applying the voltage of big phase difference to the LCOS device of the utility model
(positive direction) schematic diagram.
Fig. 6 is light incidence and the exit direction when applying the voltage of small phase difference to the LCOS device of the utility model
(negative direction) schematic diagram.
Fig. 7 is light incidence and the exit direction when applying the voltage of big phase difference to the LCOS device of the utility model
(negative direction) schematic diagram.
In figure: 1- emitting laser；2- diversing lens；3-LCOS device.
Specific embodiment
With reference to the accompanying drawing and specific embodiment is further elaborated the utility model.
As shown in Figure 1, a kind of solid state scanning laser radar based on LCOS technology of the present embodiment includes emitting laser
1, emit optical element and LCOS device 3；By the driving voltage for controlling LCOS pixel, thus it is possible to vary be incident on each pixel surface
Light position phase, when generating ladder position phase, can control incident beam deflection.It is each by quickly changing when carrying out light beam scanning
The corresponding phase difference of pixel realizes the flexible quick scanning of incident beam.
Fig. 1 show the light beam scanning theory signal of the solid state scanning laser radar based on LCOS technology of the utility model
Figure.Emitting laser 1 emits laser signal, and (transmitting optical element is specially diversing lens 2 to emitted optical element, and transmitting is saturating
Mirror is preferably non-spherical lens, can optimize the lens aberration that multi-wavelength distribution introduces) collimation output, it is incident on LCOS device 3
Face.The planar structure of LCOS device 3 is as shown in Fig. 2, effectively plane is made of the pixel of Two dimensional Distribution, the emergent light of laser radar
Spot covers multiple pixels in horizontal and vertical direction.The substrate of LCOS device 3 is CMOS IC chip, and cover board is to be coated with
The glass cover-plate of transparent electrode, CMOS substrate and glass cover-plate are combined together by micro- glass bar, form a cavity box body；
Liquid crystal filling is entered again, forms LCOS device 3.It is described perfusion liquid crystal select high refractive index perfusion liquid crystal (refractive index between
Between 1.4-1.8), under the premise of realizing identical bits phase modulation depth, it can effectively reduce the box for the cavity box body that connection is formed
Thickness improves the response speed of LCOS device.
Because liquid crystal material has birefringence effect, and birefringence effect becomes with the voltage change applied on it
Change, therefore, the position phase by liquid crystal material light can be changed by changing the voltage being applied on liquid crystal material.LCOS device
3 each pixel can independently be powered on and flexibly change the size of voltage, and then independently change liquid crystal material on each pixel
Birefringence effect intensity, it is final to change the light position phase being incident on each pixel.Current LCOS device 3 is most of to be all
Relevant liquid crystal device is polarized, is herein simple device, does not draw and polarized monotectic, it in actual use, need to be according to LCOS device
The direction of part selects specific light beam to be polarized direction.
Fig. 3 is that effect picture when all pixels on the LCOS device to the utility model apply identical voltage (while being applied
Adding no-voltage is one of application scenarios), in this case, LCOS device 3 is equivalent to plane mirror, if incident beam hangs down
Directly it is incident on the surface of LCOS device 3, outgoing beam is by backtracking；If incident beam is incident on LCOS along certain angle
The surface of device 3, outgoing beam will be emitted along the direction of mirror-reflection.Fig. 4 and Fig. 5 is to apply to the pixel on LCOS device 3
Stepping is added to increase alive effect and beam exit schematic illustration, the turn left direction of polarization of regulation light beam is positive direction herein.
Fig. 4 is the smaller situation of voltage steps amplitude, and Fig. 5 is the larger situation of voltage steps amplitude, it can be seen that the reflection of outgoing beam
Angle changes with the variation of voltage steps amplitude.Fig. 6 and Fig. 7 is the effect diagram that opposite direction applies voltage steps, out
Irradiating light beam is emitted along negative direction.In actual use, can flexibly change when the voltage change of positive negative direction, and change
Time, quick, the accurate scan of outgoing beam may be implemented in amplitude very little quickly.The position phase driving method of the utility model is wanted
Meet certain shape need, as shown in figs. 4-7, mutually drives shape by quickly adjusting different positions, realize that light beam is quickly swept
It retouches.Because the corresponding phase difference of each pixel can independently change along horizontal direction or vertical direction, LCOS device 3 can be real
Existing light beam does not need to cascade multiple similar devices in the independent scan of both direction.The step that Fig. 4 to Fig. 7 is drawn represents
The corresponding light phase difference of each pixel, practical not have moving component, therefore, this scheme has very high reliability.
In short, the solid state scanning laser radar of the utility model sweeps machinery on the basis of existing machinery scanning mode
Imaging apparatus replaces with LCOS optical beam scanner part, and LCOS can control the position phase of incident beam, according to the need of light beam scanning angle
It asks, flexibly changes the phase change angle of light beam, realize the angle change continuous scanning of light beam (by LCOS chip to unicast long letter
Number the variation of continuous position phase signals is carried out, and realizes the external scanning of Single wavelength signal), in addition, single mechanical scanner is only
One-dimensional angle rotation can be provided if you need to realize that two dimension angular rotates to need that another dimension is installed again on single mechanical scanner
Mechanical scanner, substantially increase the complexity of laser radar system, relative to mechanical scanning mode, LCOS solid-state is swept
The mode of retouching can also realize two-dimensional scanning, and any phase change on two-dimensional directional can be achieved in single LCOS optical beam scanner part,
Angle continuous rotation of the i.e. controllable scanning light beam in two-dimensional directional.
The utility model is not limited to above-mentioned optional embodiment, anyone can obtain under the enlightenment of the utility model
Other various forms of products, however, making any variation in its shape or structure, all the utility model rights that falls into are wanted
The technical solution in confining spectrum is sought, is all fallen within the protection scope of the utility model.
Claims (5)
1. a kind of solid state scanning laser radar based on LCOS technology, it is characterised in that: including emitting laser, transmitting optics member
Part and LCOS device；
The detection optical signal that the emitting laser issues is incident to the LCOS device through transmitting optical element collimation output
Part；
The LCOS device includes substrate, glass cover-plate and perfusion liquid crystal, and the substrate and glass cover-plate are connected by micro- glass bar
It is connected into a cavity box body, the perfusion liquid crystal is set in the cavity box body；
Effective plane of the LCOS device is made of the pixel of Two dimensional Distribution.
2. the solid state scanning laser radar according to claim 1 based on LCOS technology, it is characterised in that: the substrate is
CMOS IC chip, the glass cover-plate are the glass cover-plate for being coated with transparent electrode.
3. the solid state scanning laser radar according to claim 1 based on LCOS technology, it is characterised in that: the transmitting light
Element is diversing lens.
4. the solid state scanning laser radar according to claim 3 based on LCOS technology, it is characterised in that: the transmitting is saturating
Mirror is non-spherical lens.
5. the solid state scanning laser radar based on LCOS technology described in any one of -4 claims according to claim 1, special
Sign is: the perfusion liquid crystal is the perfusion liquid crystal of high refractive index.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821320471.0U CN208654318U (en) | 2018-08-15 | 2018-08-15 | A kind of solid state scanning laser radar based on LCOS technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821320471.0U CN208654318U (en) | 2018-08-15 | 2018-08-15 | A kind of solid state scanning laser radar based on LCOS technology |
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| Publication Number | Publication Date |
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| CN208654318U true CN208654318U (en) | 2019-03-26 |
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| CN201821320471.0U Active CN208654318U (en) | 2018-08-15 | 2018-08-15 | A kind of solid state scanning laser radar based on LCOS technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111239749A (en) * | 2020-02-04 | 2020-06-05 | 成都英飞睿技术有限公司 | Novel high-line-number MEMS laser radar system |
| CN113126061A (en) * | 2020-01-16 | 2021-07-16 | 上海耕岩智能科技有限公司 | Laser radar and scanning method thereof |
-
2018
- 2018-08-15 CN CN201821320471.0U patent/CN208654318U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113126061A (en) * | 2020-01-16 | 2021-07-16 | 上海耕岩智能科技有限公司 | Laser radar and scanning method thereof |
| CN113126061B (en) * | 2020-01-16 | 2023-03-10 | 上海耕岩智能科技有限公司 | Laser radar and scanning method thereof |
| CN111239749A (en) * | 2020-02-04 | 2020-06-05 | 成都英飞睿技术有限公司 | Novel high-line-number MEMS laser radar system |
| CN111239749B (en) * | 2020-02-04 | 2022-09-06 | 成都英飞睿技术有限公司 | Novel high-line-number MEMS laser radar system |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 518000 Building 901, C1, Nanshan Zhiyuan, 1001 Xueyuan Avenue, Changyuan Community, Taoyuan Street, Nanshan District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Yuwei Optical Technology Co., Ltd. Address before: Room 2256, 2266-61, 2nd floor, E Block, Dongxin Road, Donghu New Technology Development Zone, Wuhan City, Hubei Province Patentee before: Wuhan Yu Wei Optical Technology Co., Ltd. |
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| CP03 | Change of name, title or address |