CN207457649U - Disappear speckle device, laser light source and laser projection system - Google Patents
Disappear speckle device, laser light source and laser projection system Download PDFInfo
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- CN207457649U CN207457649U CN201721662867.9U CN201721662867U CN207457649U CN 207457649 U CN207457649 U CN 207457649U CN 201721662867 U CN201721662867 U CN 201721662867U CN 207457649 U CN207457649 U CN 207457649U
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Abstract
The utility model discloses one kind and disappears speckle device, laser light source and laser projection system, the speckle device that disappears includes controller and the liquid crystal panel in laser beam exits light path, liquid crystal panel includes at least two liquid crystal sub-panels, controller applies the deflection voltage of different voltages value to each liquid crystal sub-panel, so that the deflection direction of the liquid crystal in each liquid crystal sub-panel is different.The utility model can eliminate laser speckle phenomenon.
Description
Technical field
The utility model is related to laser technology fields.Disappear speckle device, laser light source and laser more particularly, to one kind
Optical projection system.
Background technology
During light source of the laser light source as optical projection system, since the high coherence of laser can cause laser beam itself to generate light
Spot interference (from relevant), laser beam, which is produced from relevant condition, is：Laser frequency is identical, direction of vibration is consistent and phase difference is permanent
It is fixed.Hot spot interference can cause the veiling glare that brightness irregularities are formed beside laser emitting hot spot, be known as laser speckle, laser speckle
Phenomenon can influence the imaging effect of projection.The more coarse laser speckle phenomenon in surface that laser projection arrives is more apparent.
Accordingly, it is desirable to provide a kind of direction of vibration by making laser in laser beam is different to eliminate disappearing for laser speckle phenomenon
Speckle device, laser light source and laser projection system.
Utility model content
Disappear speckle device, laser light source and laser projection system the purpose of this utility model is to provide one kind, to pass through
Make the direction of vibration of laser in laser beam is different to eliminate laser speckle phenomenon.
In order to achieve the above objectives, the utility model uses following technical proposals：
The utility model discloses one kind and disappears speckle device, the liquid crystal surface including controller and in laser beam exits light path
Plate, the liquid crystal panel include at least two liquid crystal sub-panels, and the controller applies different voltages value to each liquid crystal sub-panel
Deflection voltage so that the deflection direction of liquid crystal in each liquid crystal sub-panel is different.
Preferably, the liquid crystal panel includes at least two independent liquid crystal sub-panels.
Preferably, the liquid crystal sub-panel includes first substrate, second substrate, between first substrate and second substrate
Liquid crystal, the first substrate is equipped with first electrode, and the second substrate is equipped with second electrode, and the controller is to described first
Electrode and second electrode apply deflection voltage.
Preferably, the liquid crystal panel includes the liquid crystal region at least two as liquid crystal sub-panel.
Preferably, the liquid crystal panel includes first substrate, second substrate, between first substrate and second substrate
Liquid crystal, the first substrate are equipped at least two first electrodes corresponding with liquid crystal region, and the second substrate is equipped with and liquid crystal
Corresponding at least two second electrode in region, the controller apply deflection voltage to the first electrode and second electrode.
Preferably, the controller applies the deflection voltage that voltage value is sine wave respectively to each liquid crystal sub-panel.
Preferably, the liquid crystal panel includes two liquid crystal sub-panels, the deflection side of the liquid crystal in two liquid crystal sub-panels
It it is 90 ° to difference.
Preferably, the voltage value that the controller applies in deflection voltage to each liquid crystal sub-panel is 0V.
A kind of laser light source is also disclosed in the utility model, the laser including shoot laser, further includes above-mentioned dissipation spot dress
It puts.
A kind of laser projection system is also disclosed in the utility model, including above-mentioned laser light source.
The beneficial effects of the utility model are as follows：
Technical solution described in the utility model is different by making the direction of vibration of laser in laser beam, in other words by making to swash
The polarization state of laser is different in light beam eliminates laser speckle phenomenon, and technical solution described in the utility model is small, structure is simple
Single, reliability height, energy consumption are relatively low.
Description of the drawings
Specific embodiment of the present utility model is described in further detail below in conjunction with the accompanying drawings；
Fig. 1 shows to disappear the schematic diagram of speckle device.
Fig. 2 shows the schematic diagram for including the speckle device that disappears of the liquid crystal panel of another structure.
Fig. 3 shows the schematic diagram of laser light source.
Specific embodiment
In order to illustrate more clearly of the utility model, the utility model is done into one with reference to preferred embodiments and drawings
The explanation of step.Similar component is indicated with identical reference numeral in attached drawing.It will be appreciated by those skilled in the art that below
Specifically described content is illustrative and be not restrictive, and should not limit the scope of protection of the utility model with this.
If Fig. 1 and Fig. 2 are jointly shown, the speckle device provided in this embodiment that disappears, including controller 10 and positioned at laser beam
Liquid crystal panel on emitting light path, liquid crystal panel include at least two liquid crystal sub-panels, and controller 10 is applied to each liquid crystal sub-panel
Add the deflection voltage of different voltages value, so that the deflection direction of the liquid crystal in each liquid crystal sub-panel is different, in the present embodiment only
It is illustrated so that liquid crystal panel includes two liquid crystal sub-panels as an example, then liquid crystal panel is included in first be located above in Fig. 1
Liquid crystal sub-panel 20 and in Fig. 1 underlying second liquid crystal sub-panel 30, controller 10 is to 20 He of the first liquid crystal sub-panel
Second liquid crystal sub-panel 30 applies the deflection voltage of different voltages value, so that 201 He of liquid crystal in the first liquid crystal sub-panel 20
The deflection direction of liquid crystal 301 in second liquid crystal sub-panel 30 is different.
Deflection direction of the liquid crystal under the action of different deflection voltages is different, since liquid crystal has optical activity, incides into liquid
The direction of vibration (polarization direction or polarization state in other words) of laser can change as liquid crystal deflection direction is different in brilliant laser beam
Become.In the speckle device provided by the embodiment that disappears, controller 10 applies to the first liquid crystal sub-panel 20 and the second liquid crystal sub-panel 30
The deflection voltage of different voltages value, so that in 201 and second liquid crystal sub-panel 30 of liquid crystal in the first liquid crystal sub-panel 20
The deflection direction of liquid crystal 301 is different, that is to say, that due to the 201 and second sub- face of liquid crystal of liquid crystal in the first liquid crystal sub-panel 20
The deflection direction of liquid crystal 301 in plate 30 is different, incides into the direction of vibration of the fraction of laser light in the laser beam of liquid crystal 201 and enters
It is also just different to be mapped to the direction of vibration of the fraction of laser light in the laser beam of liquid crystal 301, so as to which the laser in laser beam is divided into
The different laser of two parts direction of vibration will not form interference between this two parts laser, therefore also eliminate the need for incident laser
The laser speckle phenomenon of beam.In addition, controller 10 applies different electricity to the first liquid crystal sub-panel 20 and the second liquid crystal sub-panel 30
The deflection voltage of pressure value is defined in the input voltage range of the first liquid crystal sub-panel 20 and the second liquid crystal sub-panel 30, otherwise can damage
Bad first liquid crystal sub-panel 20 and the second liquid crystal sub-panel 30.
It is above-mentioned illustrated so that liquid crystal panel includes two liquid crystal sub-panels as an example on the basis of, those skilled in the art
It will be seen that as long as controller 10 applies to each liquid crystal sub-panel when being arranged to include more liquid crystal sub-panels by liquid crystal panel
The deflection voltage of different voltages value, so that the deflection direction of liquid crystal in each liquid crystal sub-panel is different, you can realization eliminate into
Penetrate the laser speckle phenomenon of laser beam.
Further illustrate that the present embodiment eliminates the principle of laser speckle below by function formula：The deflection side of liquid crystal molecule
To change phase relation formula be：N in formulaoFor slow-axis direction refractive index, neFor
Fast axis direction refractive index, θ press from both sides for incidence angle and fast axis direction, and phase relation isWherein, d is thickness of liquid crystal, and n is
Refractive index.Apply the deflection voltage of different voltages value to the first liquid crystal sub-panel 20 and the second liquid crystal sub-panel 30 in controller 10
In the case of, the deflection direction of the liquid crystal 301 in 201 and second liquid crystal sub-panel 30 of liquid crystal in the first liquid crystal sub-panel 20 is not
Together, so the first liquid crystal sub-panel 20 is different with the refractive index of the second liquid crystal sub-panel 30, the first liquid crystal sub-panel is ultimately resulted in
20 is different with the phase relation of the second liquid crystal sub-panel 30.The wave function of laser is：Wherein A is ripple
The amplitude function of function,For the phase function of wave function；Total is from relevant wave function：
For the hot spot of small size, in the amplitude approximately equal of the first liquid crystal sub-panel 20 and the second liquid crystal sub-panel 30, i.e. Ai is equal,
And each regionDifference, and value is random.Final because position is mutually different, the summing value of Φ is 0, is so allowed for by the
Fraction of laser light in the laser beam of the second liquid crystal sub-panel 30 of fraction of laser light and process in the laser beam of one liquid crystal sub-panel 20
Polarization state it is different, interference will not be formed between this two parts laser, you can eliminate the laser speckle phenomenon of incoming laser beam.
In the specific implementation,
A kind of optional mode is that liquid crystal panel includes at least two independent liquid crystal sub-panels.Further, the sub- face of liquid crystal
Plate includes first substrate, second substrate, the liquid crystal between first substrate and second substrate, and first substrate is equipped with the first electricity
Pole, second substrate are equipped with second electrode, and controller 10 applies deflection voltage to first electrode and second electrode.As shown in Figure 1, this
It is still only illustrated in embodiment by taking liquid crystal panel includes two liquid crystal sub-panels as an example, liquid crystal panel is included in Fig. 1 middle positions
The first liquid crystal sub-panel 20 and underlying second liquid crystal sub-panel 30 in Fig. 1 in top, the first liquid crystal sub-panel 20
It is independent from each other with the second liquid crystal sub-panel 30.First liquid crystal sub-panel 20 includes first substrate 202,203 and of second substrate
Liquid crystal 201 between first substrate 202 and second substrate 203, first substrate 202 are equipped with first electrode 2021, the second base
Plate 203 is equipped with second electrode 2031.Second liquid crystal sub-panel 30 includes first substrate 302, second substrate 303 and arranged on the first base
Liquid crystal 301 between plate 302 and second substrate 303, first substrate 302 are equipped with first electrode 3021, and second substrate 303 is equipped with the
Two electrodes 3031.Controller 10 applies first electrode 2021 from deflection electricity to the first liquid crystal sub-panel 20 and second electrode 2031
Pressure, and first electrode 3021 and the application deflection voltage of second electrode 3031 to the second liquid crystal sub-panel 30.
Another optional mode is that liquid crystal panel includes the liquid crystal region at least two as liquid crystal sub-panel.Into one
Step, liquid crystal panel include first substrate, second substrate, the liquid crystal between first substrate and second substrate, and first substrate is set
There are at least two first electrodes corresponding with liquid crystal region, second substrate is equipped with corresponding with liquid crystal region at least two second electricity
Pole, controller apply deflection voltage to first electrode and second electrode.As shown in Fig. 2, still only with liquid crystal surface in the present embodiment
Plate includes illustrating exemplified by two liquid crystal sub-panels, and liquid crystal panel 40 is included in the first liquid crystal of conduct being located above in Fig. 2
First liquid crystal region of sub-panel and in fig. 2 underlying the second liquid crystal region as the second liquid crystal sub-panel, first
Liquid crystal region and the second liquid crystal region belong to liquid crystal panel, and the first liquid crystal region and the second liquid crystal region are whole to liquid crystal panel
What the liquid crystal region of body divided.Liquid crystal panel 40 includes first substrate 402, second substrate 403, arranged on first substrate 402
With the liquid crystal between second substrate 403, wherein, liquid crystal includes the liquid for belonging to the first liquid crystal region as the first liquid crystal sub-panel
Crystalline substance 401 and the liquid crystal 401` for belonging to the second liquid crystal region as the second liquid crystal sub-panel, first substrate 402 are equipped with and the first liquid
The corresponding first electrode 4021 in crystalline region domain and first electrode 4022 corresponding with the second liquid crystal region, second substrate 403 be equipped with
The corresponding second electrode 4031 of first liquid crystal region and second electrode 4032 corresponding with the second liquid crystal region, liquid crystal surface in Fig. 2
Dotted line among plate 40 illustrates that the boundary of the first liquid crystal region and the second liquid crystal region.Controller 10 to the first liquid crystal area
The corresponding first electrode 4021 in domain and second electrode 4031 apply deflection voltage, and first electrode corresponding with the second liquid crystal region
4022 and second electrode 4032 apply deflection voltage.
In the specific implementation, controller 10 can apply the deflection voltage that voltage value is sine wave to liquid crystal panel, i.e.,
The deflection voltage for the different voltages value that controller 10 applies to each liquid crystal sub-panel is respectively the deflection voltage of sine wave, this
The voltage value that sample can meet the deflection voltage applied to each liquid crystal sub-panel is different, meanwhile, controller 10 is to the sub- face of each liquid crystal
Plate apply deflection voltage voltage value easily modulation and it is easy to control.
In the specific implementation, with foregoing citing similarly, liquid crystal panel preferably includes two liquid crystal sub-panels, into one
Step, controller 10 cause to the deflection voltage for the different voltages value that two liquid crystal sub-panels of liquid crystal apply in two liquid crystal sub-panels
Liquid crystal deflection direction difference for 90 °, then by the direction of vibration of the fraction of laser light in the laser beam of a liquid crystal sub-panel
90 ° are also differed with the direction of vibration by the fraction of laser light in the laser beam of another liquid crystal sub-panel, such as by a liquid
Fraction of laser light in the laser beam of matted crystal panel is S states linearly polarized light then by the portion in the laser beam of another liquid crystal sub-panel
Shunt excitation light is P state linearly polarized lights, and such maximizing realizes the effect of dissipation spot.
In the specific implementation, controller 10 applies a voltage value in deflection voltage as 0V to each liquid crystal sub-panel, this
Sample can reduce energy consumption and not interfere with the effect of dissipation spot.
As shown in figure 3, the present embodiment additionally provides a kind of laser light source, laser 50 including shoot laser and above-mentioned disappear
Speckle device, the laser beam that laser 50 is emitted can eliminate laser speckle phenomenon after liquid crystal panel, further, in laser
In laser beam exits light path between device 50 and liquid crystal panel, laser light source further includes to swash for the diverging for being emitted laser 50
Light beam is converted to the collimation lens 60 of collimated laser beam.
The present embodiment additionally provides a kind of laser projection system, including above-mentioned laser light source.
, it is necessary to the orientation or position relationship of the instructions such as explanation, term " on ", " under " in the description of the utility model
To be based on orientation shown in the drawings or position relationship, being for only for ease of description the utility model and simplifying description, without referring to
Show or imply that the device of meaning or element there must be specific orientation, with specific azimuth configuration and operation, therefore cannot manage
It solves as the limitation to the utility model.Unless otherwise clearly defined and limited, term " installation ", " connected ", " connection " should be done
It broadly understood, for example, it may be being fixedly connected or being detachably connected or be integrally connected；Can be mechanical connection,
It can also be electrical connection；It can be directly connected, can also be indirectly connected by intermediary, can be inside two elements
Connection.For the ordinary skill in the art, it can understand above-mentioned term in the utility model as the case may be
Concrete meaning.
It should also be noted that, in the description of the utility model, relational terms such as first and second and the like are only
Only it is used for distinguishing one entity or operation from another entity or operation, without necessarily requiring or implying these realities
There are any actual relationship or orders between body or operation.Moreover, term " comprising ", "comprising" or its it is any its
He is intended to non-exclusive inclusion by variant, so that process, method, article or equipment including a series of elements are not
Only include those elements, but also including other elements that are not explicitly listed or further include for this process, method,
Article or the intrinsic element of equipment.In the absence of more restrictions, it is wanted by what sentence "including a ..." limited
Element, it is not excluded that also there are other identical elements in the process, method, article or apparatus that includes the element.
Obviously, above-described embodiment of the utility model is only intended to clearly illustrate the utility model example, and
It is not the restriction to the embodiment of the utility model, for those of ordinary skill in the art, in above description
On the basis of can also make other variations or changes in different ways, all embodiments can not be exhaustive here,
It is every to belong to obvious changes or variations that the technical solution of the utility model is extended out still in the utility model
The row of protection domain.
Claims (10)
- The speckle device 1. one kind disappears, which is characterized in that the liquid crystal panel including controller and in laser beam exits light path, institute Stating liquid crystal panel includes at least two liquid crystal sub-panels, and the controller applies the deflection of different voltages value to each liquid crystal sub-panel Voltage, so that the deflection direction of the liquid crystal in each liquid crystal sub-panel is different.
- 2. the speckle device according to claim 1 that disappears, which is characterized in that it is independent that the liquid crystal panel includes at least two Liquid crystal sub-panel.
- 3. the speckle device according to claim 2 that disappears, which is characterized in that the liquid crystal sub-panel includes first substrate, the Two substrates, the liquid crystal between first substrate and second substrate, the first substrate are equipped with first electrode, the second substrate Equipped with second electrode, the controller applies deflection voltage to the first electrode and second electrode.
- 4. the speckle device according to claim 1 that disappears, which is characterized in that the liquid crystal panel includes at least two and is used as liquid The liquid crystal region of matted crystal panel.
- 5. the speckle device according to claim 4 that disappears, which is characterized in that the liquid crystal panel includes first substrate, second Substrate, the liquid crystal between first substrate and second substrate, the first substrate are equipped with corresponding with liquid crystal region at least two A first electrode, the second substrate are equipped at least two second electrodes corresponding with liquid crystal region, and the controller is to described First electrode and second electrode apply deflection voltage.
- 6. the speckle device according to claim 1 that disappears, which is characterized in that the controller is applied respectively to each liquid crystal sub-panel Making alive value is the deflection voltage of sine wave.
- 7. the speckle device according to claim 1 that disappears, which is characterized in that the liquid crystal panel includes two sub- faces of liquid crystal Plate, the deflection direction difference of the liquid crystal in two liquid crystal sub-panels is 90 °.
- 8. the speckle device according to claim 1 that disappears, which is characterized in that the controller applies inclined to each liquid crystal sub-panel It is 0V to turn a voltage value in voltage.
- 9. a kind of laser light source includes the laser of shoot laser beam, which is characterized in that further includes as appointed in claim 1-8 The speckle device that disappears described in one.
- 10. a kind of laser projection system, which is characterized in that including laser light source as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721662867.9U CN207457649U (en) | 2017-12-04 | 2017-12-04 | Disappear speckle device, laser light source and laser projection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721662867.9U CN207457649U (en) | 2017-12-04 | 2017-12-04 | Disappear speckle device, laser light source and laser projection system |
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| Publication Number | Publication Date |
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| CN207457649U true CN207457649U (en) | 2018-06-05 |
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| CN201721662867.9U Active CN207457649U (en) | 2017-12-04 | 2017-12-04 | Disappear speckle device, laser light source and laser projection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110873973A (en) * | 2018-09-04 | 2020-03-10 | 通用汽车环球科技运作有限责任公司 | Tunable thin film devices |
-
2017
- 2017-12-04 CN CN201721662867.9U patent/CN207457649U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110873973A (en) * | 2018-09-04 | 2020-03-10 | 通用汽车环球科技运作有限责任公司 | Tunable thin film devices |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201026 Address after: 261031 north of Yuqing street, east of Dongming Road, high tech Zone, Weifang City, Shandong Province (Room 502, Geer electronic office building) Patentee after: GoerTek Optical Technology Co.,Ltd. Address before: 266100 Qingdao, Laoshan District, North House Street investment service center room, Room 308, Shandong Patentee before: GOERTEK TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right |