CN109752908A - A kind of multi-wavelength visible light light source, display module and projection display apparatus - Google Patents
A kind of multi-wavelength visible light light source, display module and projection display apparatus Download PDFInfo
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Abstract
The invention discloses a kind of multi-wavelength visible light light source, display module and projection display apparatus, comprising: the infrared light generating device of laser pumping source, beam splitter, multi-wavelength, bundling device and the first nonlinear crystal；The laser pumping source is for exporting pump light；The beam splitter is used to the pump light beam splitting be first via pump light and the second road pump light；The infrared light generating device of multi-wavelength is used under the excitation of the first via pump light, generates the infrared light of multiple and different wavelength；The bundling device is used to merge the infrared light and second road pump light of the multiple different wave length；The light of the multiple different wave length and second road pump light are incident to first nonlinear crystal, so that the light of the multiple different wave length carries out respectively with the second road pump light and frequency, generate the visible light of the different wave length of multiple same colors.Disappear the ropy technical problem of light beam of light source of speckle device for solving multi-wavelength in the prior art, improves light beam of light source quality.
Description
Technical field
The present invention relates to solid state laser field more particularly to a kind of multi-wavelength visible light light sources, display module and projection
Show equipment.
Background technique
In the field of display, have using laser as display light source and have an enormous advantage, superiority be mainly manifested in
Lower several points: the first, the monochromaticjty of laser is good, and color domain coverage ratio and color saturation are very high；The second, the wavelength spectral line of laser is rich
Richness, optical source wavelength are alternative more.
In practical applications, laser can be used as projection light source, and the optical wave proj ection of laser transmitting is to body surface (such as curtain
Cloth or metope) when, for the wavelength of the light wave of laser transmitting, most of body surfaces are that roughness is greater than light wave wave
It is long, due to the high coherence of laser, when light wave is reflected from body surface, many can be formed in space due to coherent phase
Long, cancellation spot, these spots are mainly to be formed since the relevant wavelet of each point scattering on the rough surface of object is superimposed,
Also, since the roughness of body surface is greater than optical wavelength, the relevant wavelet of each point scattering reaches point of observation (i.e. people on object
Eye) position be mutually random distribution, the stack result of relevant wavelet just produces the spot of similar random patterns, i.e. laser dissipates
Spot, laser speckle will have a direct impact on the contrast of laser imaging.
In the prior art, can achieve the purpose that eliminate speckle using multi wave length illuminating source, because working as the light source of same color
In contain multiple wavelength light wave when, the interference effect between Different lightwave can be effectively reduced, effectively weaken speckle influence.
The device of multi-wavelength dissipation spot is used in patent US006304237B1, but the nonlinear crystal that its light source uses to be excessively various,
Structure is wordy, and experimental provision implements excessively many and diverse.Swashed in CN102064473B patent using the semiconductor of Broadband emission
Light device realizes the diversity of light source, and to achieve the purpose that dissipation spot, but the angle of divergence that semiconductor laser goes out light is bigger, with
The light beam of light source for causing such method to realize is of poor quality.Edge-emission semiconductor is realized using photonic crystal in CN104993376A patent
Super-radiation light source, wide range superradiation light-emitting is realized using chirp slit, and such method equally has beam optical is ropy to ask
Topic.
The purpose of the present invention is to provide a kind of new multi wave length illuminating sources, dissipate to solve multi-wavelength in the prior art
The light-source structure of spot device is complicated, the technical problem of beam quality difference.
Summary of the invention
The object of the present invention is to provide a kind of multi-wavelength visible light light source, display module and projection display apparatus, for solving
Multi-wavelength certainly in the prior art disappear speckle device light-source structure it is complicated, the technical problem of beam quality difference, raising light source light
Beam quality.
In order to achieve the above-mentioned object of the invention, first aspect of the embodiment of the present invention provides a kind of multi-wavelength visible light light source, packet
It includes:
The infrared light generating device of laser pumping source, beam splitter, multi-wavelength, bundling device and the first nonlinear crystal；
The laser pumping source is for exporting pump light；
The beam splitter is located on the emitting light path of the laser pumping source, and the beam splitter is used for the pump light point
Beam is first via pump light and the second road pump light；
The infrared light generating device of multi-wavelength is located on the emitting light path of the first via pump light, and the multi-wavelength is red
Outer light generating device is used under the excitation of the first via pump light, generates the infrared light of multiple and different wavelength；
The bundling device is arranged on the emitting light path of the infrared light generating device of the multi-wavelength, and the bundling device is for closing
And the infrared light of the multiple different wave length and second road pump light；
First nonlinear crystal is located on the emitting light path of the bundling device, the light of the multiple different wave length and institute
It states the second road pump light and is incident to first nonlinear crystal, so that the light of the multiple different wave length is pumped with the second tunnel respectively
Pu light carries out and frequency, generates the visible light of the different wave length of multiple same colors.
Optionally, the color of the visible light is red or green, and the infrared light generating device of multi-wavelength includes laser
Crystal and the second nonlinear crystal；
The laser crystal is located on the emitting light path of the first via pump light, and the laser crystal is in the first via
Under the excitation of pump light, third road pump light is generated；
Second nonlinear crystal is the nonlinear crystal of multicycle, and second nonlinear crystal is located at the laser
On the emitting light path of crystal, optical parametric oscillation occurs for third road pump light and second nonlinear crystal, described in generation
The infrared light of multiple and different wavelength.
Optionally, the light source further include:
First reflecting mirror, between second nonlinear crystal and the bundling device, first reflecting mirror is to institute
The infrared light for stating multiple and different wavelength is anti-reflection, high to third road pump light anti-；
The light incident side of the laser crystal is anti-reflection in face of the first via pump light, to third road pump light height
Instead；The light exit side of the laser crystal is anti-reflection in face of the first via pump light, anti-reflection to third road pump light.
Optionally, first nonlinear crystal is periodic polarized lithium niobate PPLN crystal or periodic polarized phosphoric acid oxygen
Titanium potassium PPKTP crystal；Second nonlinear crystal is periodic polarized lithium niobate PPLN crystal or periodic polarized iodine
Sour crystalline lithium.
Optionally, the color of the visible light is blue, and the infrared light generating device of multi-wavelength includes laser crystal, institute
It states laser crystal to be located on the emitting light path of the first via pump light, the laser crystal is used in the first via pump light
Excitation under, generate third road pump light, third road pump light includes the infrared light of two different wave lengths.
Optionally, the light source further include:
Second reflecting mirror, between the laser crystal and the bundling device, second reflecting mirror is with the first transmission
Rate penetrates third road pump light, and second reflecting mirror is high to the first via pump light anti-；
The light incident side of the laser crystal is anti-reflection in face of the first via pump light, to third road pump light height
Instead；The light exit side of the laser crystal in face of first pump light, third road pump light is anti-reflection.
Optionally, first nonlinear crystal is periodic polarized lithium niobate PPLN crystal or periodic polarized phosphoric acid oxygen
Titanium potassium PPKTP crystal.
Optionally, the laser crystal is neodymium-doped yttrium neodymium garnet Nd:YAG, Nd-doped yttrium vanadate Nd:YVO4, neodymium-doped are fluorinated
Yttrium lithium Nd:YLF, neodymium-doped yttrium aluminate Nd:YAP, Nd-doped lanthanum-magnesium aluminate Nd:LMA, Nd-doped yttrium vanadate Nd:GdVO4.
Second aspect of the embodiment of the present invention provides a kind of display module, including light source, optical fiber, actuator, the light source packet
Include multiple multi-wavelength visible light light sources as described in relation to the first aspect, the different colours that the multiple multi-wavelength visible light light source generates
Multi-wavelength visible light be coupled into the optical fiber, the actuator is for driving the optical fiber to swing in three dimensions.
The third aspect of the embodiment of the present invention provides a kind of projection display apparatus, including one or more is as described in second aspect
Display module.
One or more technical solution in the embodiment of the present invention, at least has the following technical effect that or advantage:
In the embodiment of the present invention, for monochromatic visible light, it is only necessary to which laser pumping light source generates a branch of pump light, and should
Beam pump light beam splitting is first via pump light and the second road pump light, and first via pump light is for motivating multi-wavelength infrared light to generate
Device, generates the infrared light of multiple and different wavelength, and it is non-that the infrared light of the second road pump light and multiple and different wavelength is incident to first
Linear crystal, so that the light of multiple and different wavelength carries out respectively with the second road pump light and frequency, to obtain multiple and different wavelength
Monochromatic visible light.Scheme in the embodiment of the present invention is using solid laser material as operation material, it is only necessary to a laser
Pump light source, the infrared light generating device of a multi-wavelength and a nonlinear crystal, so that it may multi-wavelength monochromatic visible light is obtained,
Its capacity usage ratio is high, and good beam quality has the advantages of simple structure and easy realization.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings:
Fig. 1 is the structural schematic diagram of multi-wavelength visible light light source provided in an embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of the possible infrared light generating device of multi-wavelength provided in an embodiment of the present invention；
Fig. 3 is the schematic diagram of optical parametric oscillation process provided in an embodiment of the present invention；
Fig. 4 is the light path schematic diagram of green-light source provided in an embodiment of the present invention；
Fig. 5 is the light path schematic diagram of red-light source provided in an embodiment of the present invention；
Fig. 6 is the structural schematic diagram of the first reflecting mirror provided in an embodiment of the present invention；
Fig. 7 is the structural schematic diagram of the infrared light generating device of alternatively possible multi-wavelength provided in an embodiment of the present invention；
Fig. 8 is the light path schematic diagram of blue light source provided in an embodiment of the present invention；
Fig. 9 is the structural schematic diagram of the second reflecting mirror provided in an embodiment of the present invention；
Figure 10 is the structural schematic diagram of display module provided in an embodiment of the present invention；
Figure 11 is the structural schematic diagram in rgb light source provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to FIG. 1, Fig. 1 is the structural schematic diagram of multi-wavelength visible light light source provided in an embodiment of the present invention, the device
It include: laser pumping source 10, beam splitter 20, the infrared light generating device 30 of multi-wavelength, bundling device 40 and the first nonlinear crystal 50；
The laser pumping source 10 is for exporting pump light；The beam splitter 20 is located on the emitting light path of the laser pumping source 10,
The beam splitter 20 is used to the pump light beam splitting be first via pump light and the second road pump light；The multi-wavelength infrared light
Generation device 30 is located on the emitting light path of the first via pump light, and the infrared light generating device 30 of multi-wavelength is used in institute
Under the excitation for stating first via pump light, the infrared light of multiple and different wavelength is generated；The bundling device 40 is arranged in the multi-wavelength
On the emitting light path of infrared light generating device 30, the bundling device 40 is used to merge the infrared light and the of the multiple different wave length
Two road pump lights；First nonlinear crystal 50 is located on the emitting light path of the bundling device 40, the multiple different wave length
Light and second road pump light be incident to first nonlinear crystal 50 so that the light of the multiple different wave length is distinguished
It is carried out with the second road pump light and frequently, generates the visible light of the different wave length of multiple same colors, wherein M1 is reflecting mirror, instead
The film that is all-trans can be plated by penetrating on mirror M1.
Wherein, it is seen that the color of light can be red, green or blue, in other words, implement through the invention in side
RGB three-color light source may be implemented in case.
In the embodiment of the present invention, the pump light beam splitting that laser pumping source 10 is exported is that first via pump light and the second tunnel pump
Pu light, first via pump light is for motivating the infrared light generating device 30 of the multi-wavelength, to generate the infrared of multiple and different wavelength
Light, the second road pump light is used to carry out respectively with the infrared light of multiple and different wavelength and frequency, to generate the visible light of different wave length.
Scheme in the embodiment of the present invention is using solid laser material as operation material, it is only necessary to a laser pumping light source 10, one
A infrared light generating device 30 of multi-wavelength and first nonlinear crystal 50, so that it may multi-wavelength monochromatic visible light is obtained,
Capacity usage ratio is high, and good beam quality has the advantages of simple structure and easy realization.
In a kind of possible embodiment, when the color of visible light is red or green, as shown in Fig. 2, described more
IR wavelengths generation device includes laser crystal 301 and the second nonlinear crystal 302；The laser crystal 301 is located at described
On the emitting light path of first via pump light, the laser crystal 301 generates third road under the excitation of the first via pump light
Pump light；Second nonlinear crystal 302 is the nonlinear crystal of multicycle, and second nonlinear crystal 302 is located at institute
On the emitting light path for stating laser crystal 301, the wavelength of third road pump light is greater than the wavelength of first via pump light, and described the
Three road pump lights and second nonlinear crystal 302 meet the condition of quasi-phase matched, so that it may optical parametric oscillation occur, produce
The infrared light of raw multiple and different wavelength, wherein M2 is concave mirror, and concave mirror M2 is high to third road pump light anti-.
Referring to FIG. 3, being the schematic diagram of optical parametric oscillation process provided in an embodiment of the present invention, optical parametric oscillation can be incited somebody to action
The laser of one frequency is converted to frequency signal and the output of idle frequence signal of needs, moreover, its frequency range can be one
Tuning is realized in a very wide frequency range.As shown in figure 3, ωpFor be incident on the second nonlinear crystal 302 light angular frequency
Rate, ωsAnd ωiThe respectively angular frequency of the light of optical parametric oscillation generation, the π of ω=2 f, wherein ω is the angular frequency of light, and f is light
Frequency, the wavelength and frequency of light are in inversely prroportional relationship, and the wavelength of the light specifically generated is by conservation of energy conditional decision.
In the embodiment of the present invention, and frequency is a kind of processing method of nonlinear optics, this phenomenon mainly eliminates two
With angular frequency1And ω2Photon, while generating an angular frequency3Photon.In other words, in the embodiment of the present invention, pass through
The infrared light for multiple and different wavelength that the infrared light generating device of multi-wavelength is generated, respectively with the second road pump light and frequency, energy
Access the visible light of different wave length.
For example, as shown in Figure 4 and Figure 5,10 output wavelength of laser pumping source is the pump light of 808nm, beam splitter 20
Pump light is divided into first via pump light and the second road pump light, the first via pumps optically pumped laser crystal 301, and generation wavelength is
The third road pump light of 1064nm, then, the second nonlinear crystal 302 of third road pump light and multicycle interact, hair
Raw optical parametric oscillation, generates nearly 1.5 μm and nearly 3.5 μm of light, the wavelength specifically generated is by conservation of energy conditional decision.
In the embodiment of the present invention, when light source is green-light source, as shown in figure 4, it is to need that wavelength, which is nearly 1.5 μm of light,
Infrared light, it is assumed that the wavelength of nearly 1.5 μm of light is respectively 1500nm, 1550nm, 1650nm, by the infrared of these three different wave lengths
The the second road pump light and frequency that light is respectively 808nm with wavelength, so that it may which generation wavelength is respectively 525nm, 531nm and 542nm
Green light, to realize multi-wavelength green-light source.
In the embodiment of the present invention, when light source is red-light source, as shown in figure 5, it is to need that wavelength, which is nearly 3.5 μm of light,
Infrared light, it is assumed that the wavelength of nearly 3.5 μm of light is respectively and 3500nm, 3600nm, 3800nm, then by these three different wave lengths
The the second road pump light and frequency that infrared light is respectively 808nm with wavelength, so that it may generation wavelength is respectively 656nm, 659nm and
The feux rouges of 666nm, to realize multi-wavelength red-light source.
It should be noted that above-mentioned wavelength is merely illustrative, it in the specific implementation process, can be right according to the actual situation
The wavelength of light source is configured, and the present invention is without limitation.
In the embodiment of the present invention, laser crystal 301 can be neodymium-doped yttrium neodymium garnet Nd:YAG, Nd-doped yttrium vanadate Nd:
YVO4, neodymium-doped yttrium-fluoride lithium Nd:YLF, neodymium-doped yttrium aluminate Nd:YAP, Nd-doped lanthanum-magnesium aluminate Nd:LMA, Nd-doped yttrium vanadate Nd:
GdVO4 etc., the present invention are without limitation.Second nonlinear crystal 302 is periodic polarized lithium niobate PPLN crystal or iodine
Sour crystalline lithium, the first nonlinear crystal 50 can be periodic polarized lithium niobate PPLN crystal or periodic polarized potassium titanyl phosphate
PPKTP crystal etc., the amount of cycles of linear crystal can be by polarizing controls, and different wave length that optical parametric oscillation generates
The quantity of light and the amount of cycles of nonlinear crystal are related, different according to the period of crystal, the light of available different wave length.
In the embodiment of the present invention, in order to improve pump energy utilization rate, as shown in fig. 6, the multi-wavelength visible light light
Source further include: the first reflecting mirror 60, between second nonlinear crystal 302 and the bundling device 40, described first is anti-
It is anti-reflection to the infrared light of the multiple different wave length to penetrate mirror 60, it is high to third road pump light anti-；The laser crystal 301
Light-incident end 3011 is anti-reflection to the first via pump light, high to third road pump light anti-；The laser crystal 301
Light exit side face 3012 is anti-reflection to the first via pump light, anti-reflection to third road pump light.
Continue to use the example of above-mentioned realization multi-wavelength green-light source, it is assumed that the second nonlinear crystal 302 is emitted multiple infrared
The wavelength of light is respectively 1500nm, 1550nm, 1650nm, 3660nm, 3393nm, 2996nm, then the first reflecting mirror 60 is to wavelength
Light for 1500nm, 1550nm, 1650nm is anti-reflection, generates to the third road pump light and parameter concussion that wavelength is 1064nm
Wavelength be 3660nm, the light of 3393nm, 2996nm is high anti-；Corresponding, the light-incident end 3011 of laser crystal 301 is to wavelength
It is anti-reflection for the first via pump light of 808nm, it is that 1064nm third road pump light is high anti-to wavelength；The light of the laser crystal 301
Being emitted end face 3012 is that 808nm first via pump light is anti-reflection to wavelength, anti-reflection to the third road pump light that wavelength is 1064nm, is made
The third road pump light for obtaining the wavelength 1064nm being emitted from the second nonlinear crystal 302, it is non-linear can be again incident on second
Optical parametric oscillation occurs for crystal 302, to improve pump energy utilization rate.
Another example is: continuing to use the example of above-mentioned multi-wavelength red-light source, it is assumed that the second nonlinear crystal 302 is emitted multiple red
Outer light includes wavelength 3500nm, 3600nm, 3800nm, and 1529nm, 1510nm, the light of 1478nm, then the first reflecting mirror 60 is to wave
The light of a length of 3500nm, 3600nm, 3800nm are anti-reflection, produce to the third road pump light and parameter concussion that wavelength is 1064nm
Raw wavelength is 1529nm, and the light of 1510nm, 1478nm are high anti-；Corresponding, the light-incident end 3011 of laser crystal 301 is to wave
The first via pump light of a length of 808nm is anti-reflection, is that 1064nm third road pump light is high anti-to wavelength；The laser crystal 301
Light exit side face 3012 is that 808nm first via pump light is anti-reflection to wavelength, anti-reflection to the third road pump light that wavelength is 1064nm,
So that the third road pump light for the wavelength 1064nm being emitted from the second nonlinear crystal 302, it is non-thread can be again incident on second
Property crystal 302 occur optical parametric oscillation, to improve pump energy utilization rate.
As shown in fig. 6, the multi-wavelength visible light light source further includes lens L1 and lens L2, lens L1 is located at beam splitter 20
Between laser crystal 301, the light beam that lens L1 is used to export beam splitter 20 is focused, and is then incident to laser crystal
301.Between the bundling device 40 and first nonlinear crystal 50, lens L2 is used to export bundling device 40 lens L2
Light beam be focused, be then incident to the first nonlinear crystal 50.
In alternatively possible embodiment, when the color of visible light is blue, as shown in fig. 7, the multi-wavelength
Infrared light generating device includes laser crystal 301, and the laser crystal 301 is located at the emitting light path of the first via pump light
On, the laser crystal 301 generates the infrared light of two different wave lengths, wherein M1 under the excitation of the first via pump light
It is reflecting mirror with M2.
For example, as shown in Figure 7 and Figure 8,10 output wavelength of laser pumping source is the pump light of 780nm, beam splitter 20
Pump light is divided into first via pump light and the second road pump light, the first via pumps optically pumped laser crystal 301, generation wavelength point
Not Wei 1064nm and 1342nm infrared light, then, third road pump light is incident to the first non-linear crystalline substance with specific period
On body 50, so that the light of 1064nm and 1342nm generates the blue light of 450nm and 493nm respectively with the pump light of 780nm and frequency,
To obtain the blue light source of dual wavelength.
In the embodiment of the present invention, in order to improve utilization ratio of optical energy, as shown in figure 9, the light source further include: the second reflection
Mirror 70, between the laser crystal 301 and the bundling device 40, second reflecting mirror 70 penetrates institute with the first transmissivity
The infrared light of two different wave lengths is stated, and second reflecting mirror 70 is high to the first via pump light anti-.The embodiment of the present invention
In, it can be anti-come the part for realizing the infrared light of described two different wave lengths by plating part reflectance coating on the first reflecting mirror 60
It penetrates and transmits, part reflectance coating can be 5% or so to the transmissivity of the infrared light of the multiple different wave length, remaining is infrared
Light is reflected back laser crystal 301, and those skilled in the art can according to actual needs be configured the first transmissivity, the present invention
It is without limitation.The light-incident end 3011 of the laser crystal 301 is anti-reflection to the first via pump light, to described two
The infrared light of different wave length is high anti-；The light exit side face 3012 of the laser crystal 301 is to the first via pump light, described two
The infrared light of a different wave length is anti-reflection, so that first via pump light is incident to laser crystal 301 again, improves pumping luminous energy
Measure utilization rate.
For example, the example of above-mentioned multi-wavelength blue laser output is continued to use, it is assumed that the infrared light wavelength that laser crystal 301 is emitted
Respectively 1064nm and 1342nm, then the light that the second reflecting mirror 70 is 1064nm and 1342nm through wavelength with the first transmissivity,
The light of remaining 1064nm and 1342nm is reflected back laser crystal 301, and the first via that the second reflecting mirror 70 is 780nm to wavelength
Pump light is high anti-；The light-incident end 3011 of the laser crystal 301 is anti-reflection to the first via pump light that wavelength is 780nm, right
Wavelength is that the light of 1064nm and 1342nm is high anti-, and the light exit side face 3012 of the laser crystal 301 is to that wavelength is 780nm
Pump light, wavelength are anti-reflection for the infrared light of 1064nm and 1342nm all the way.
As shown in figure 9, the multi-wavelength visible light light source further includes lens L3 and lens L4, lens L3 is located at beam splitter 20
In laser crystal 301, the light beam that lens L3 is used to export beam splitter 20 is focused, and is then incident to laser crystal 301,
For lens L4 between the bundling device 40 and first nonlinear crystal 50, lens L4 is used for the light exported to bundling device 40
Beam is focused, and is then incident to the first nonlinear crystal 50.
In the embodiment of the present invention, the pump light of corresponding different wave length can choose matched laser crystal 301, swash
Luminescent crystal 301 can be neodymium-doped yttrium neodymium garnet Nd:YAG, Nd-doped yttrium vanadate Nd:YVO4, neodymium-doped yttrium-fluoride lithium Nd:YLF, neodymium-doped
Yttrium aluminate Nd:YAP, Nd-doped lanthanum-magnesium aluminate Nd:LMA, Nd-doped yttrium vanadate Nd:GdVO4 etc., the present invention are without limitation.The
One nonlinear crystal 50 can be monocyclic periodic polarized lithium niobate PPLN crystal or monocyclic periodic polarized phosphoric acid
Oxygen titanium potassium PPKTP crystal etc..
In the embodiment of the present invention, in the corresponding any embodiment of Fig. 1-Fig. 9, the beam splitter 20 can be for can thoroughly can be anti-
Mirror is used for permeation parts incident light, reflective portion incident light, so that the pump light beam splitting that laser pumping source 10 is exported is first
Road pump light and the second road pump light.The bundling device 40 is dichroscope, and the characteristics of dichroscope is the light to certain wavelength
It almost penetrates, and the light of other wavelength is almost reflected, in embodiments of the present invention, bundling device 40 is for reflecting
With the infrared light of multiple and different wavelength needed for frequency, through the second road pump light, to merge the infrared light of multiple and different wavelength
With the second road pump light.
Based on the same inventive concept, the embodiment of the present invention also provides a kind of display module, and as shown in Figure 10, Figure 10 is this hair
The structural schematic diagram for the display module that bright embodiment provides, display module includes light source 80, optical fiber 90, actuator 100, the light
Source includes the multi-wavelength visible light light source in multiple above-described embodiments, the multi-wavelength visible light for the different colours that the light source generates
It is coupled into the optical fiber 90, the actuator 100 is for driving the optical fiber 90 to swing in three dimensions.Earlier figures 1- Fig. 9 couple
The various change mode of the multi-wavelength visible light light source in embodiment and specific example is answered to be equally applicable to the display of the present embodiment
Mould group, by the aforementioned detailed description to multi-wavelength visible light light source, those skilled in the art are clear that this implementation
The implementation method of display module in example, so this will not be detailed here in order to illustrate the succinct of book.
In the embodiment of the present invention, by taking light source is rgb light source as an example, as shown in figure 11, Figure 11 provides for the embodiment of the present invention
Rgb light source structural schematic diagram, then light source 80 include multi-wavelength red-light source 801, multi-wavelength green-light source 802 and multi-wavelength
Blue light source 803, the light that three light sources generate can be coupled into optical fiber 90 after bundling device 804 closes beam, then pass through actuator 100
90 scanning imagery of optical fiber is driven not share the same light due to including multiple and different wavelength in each Color Channel to be effectively reduced
Interference effect between wave realizes the purpose for eliminating laser speckle, improves optical fiber scanning image quality.
Display module in the embodiment of the present invention can be applied in various projection display apparatus, such as: AR (full name in English:
Augmented Reality；Chinese: augmented reality) equipment, laser television, laser-projector etc., it is aobvious in these projections
Show in equipment, a display module can be used and shown, can also be shown in such a way that multiple display modules are spliced
Show, the present invention is without limitation.
One or more technical solution in the embodiment of the present invention, at least has the following technical effect that or advantage:
In the embodiment of the present invention, for monochromatic visible light, it is only necessary to which laser pumping light source generates a branch of pump light, and should
Beam pump light beam splitting is first via pump light and the second road pump light, and first via pump light is for motivating multi-wavelength infrared light to generate
Device, generates the infrared light of multiple and different wavelength, and it is non-that the infrared light of the second road pump light and multiple and different wavelength is incident to first
Linear crystal, so that the light of multiple and different wavelength carries out respectively with the second road pump light and frequency, to obtain multiple and different wavelength
Monochromatic visible light.Scheme in the embodiment of the present invention is using solid laser material as operation material, it is only necessary to a laser
Pump light source, the infrared light generating device of a multi-wavelength and a nonlinear crystal, so that it may multi-wavelength monochromatic visible light is obtained,
Its capacity usage ratio is high, and good beam quality has the advantages of simple structure and easy realization.
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Any feature disclosed in this specification (including any accessory claim, abstract and attached drawing), except non-specifically chatting
It states, can be replaced by other alternative features that are equivalent or have similar purpose.That is, unless specifically stated, each feature is only
It is an example in a series of equivalent or similar characteristics.
The invention is not limited to specific embodiments above-mentioned.The present invention, which expands to, any in the present specification to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (10)
1. a kind of multi-wavelength visible light light source characterized by comprising
The infrared light generating device of laser pumping source, beam splitter, multi-wavelength, bundling device and the first nonlinear crystal；
The laser pumping source is for exporting pump light；
The beam splitter is located on the emitting light path of the laser pumping source, and the beam splitter for being by the pump light beam splitting
First via pump light and the second road pump light；
The infrared light generating device of multi-wavelength is located on the emitting light path of the first via pump light, the multi-wavelength infrared light
Generation device is used under the excitation of the first via pump light, generates the infrared light of multiple and different wavelength；
The bundling device is arranged on the emitting light path of the infrared light generating device of the multi-wavelength, and the bundling device is for merging institute
State the infrared light and second road pump light of multiple and different wavelength；
First nonlinear crystal is located on the emitting light path of the bundling device, the light of the multiple different wave length and described the
Two road pump lights are incident to first nonlinear crystal so that the light of the multiple different wave length respectively with the second road pump light
It carries out and frequently, generates the visible light of the different wave length of multiple same colors.
2. light source as described in claim 1, which is characterized in that the color of the visible light is red or green, more waves
Long infrared light generating device includes laser crystal and the second nonlinear crystal；
The laser crystal is located on the emitting light path of the first via pump light, and the laser crystal is pumped in the first via
Under the excitation of light, third road pump light is generated；
Second nonlinear crystal is the nonlinear crystal of multicycle, and second nonlinear crystal is located at the laser crystal
Emitting light path on, optical parametric oscillation occurs for third road pump light and second nonlinear crystal, generates the multiple
The infrared light of different wave length.
3. light source as claimed in claim 2, which is characterized in that the light source further include:
First reflecting mirror, between second nonlinear crystal and the bundling device, first reflecting mirror is to described more
The infrared light of a different wave length is anti-reflection, high to third road pump light anti-；
The light incident side of the laser crystal is anti-reflection in face of the first via pump light, high to third road pump light anti-；Institute
The light exit side for stating laser crystal is anti-reflection in face of the first via pump light, anti-reflection to third road pump light.
4. light source as claimed in claim 2 or claim 3, which is characterized in that first nonlinear crystal is periodic polarized niobic acid
Lithium PPLN crystal or periodic polarized potassium titanyl phosphate PPKTP crystal；Second nonlinear crystal is periodic polarized niobium
Sour lithium PPLN crystal or periodic polarized lithium iodate.
5. light source as described in claim 1, which is characterized in that the color of the visible light is blue, and the multi-wavelength is infrared
Light generating device includes laser crystal, and the laser crystal is located on the emitting light path of the first via pump light, the laser
Crystal is used under the excitation of the first via pump light, generates third road pump light, and third road pump light includes two
The infrared light of different wave length.
6. light source as claimed in claim 5, which is characterized in that the light source further include:
Second reflecting mirror, between the laser crystal and the bundling device, second reflecting mirror is saturating with the first transmissivity
Third road pump light is crossed, and second reflecting mirror is high to the first via pump light anti-；
The light incident side of the laser crystal is anti-reflection in face of the first via pump light, high to third road pump light anti-；Institute
State the light exit side of laser crystal in face of first pump light, third road pump light is anti-reflection.
7. such as light source described in claim 5 or 6, which is characterized in that first nonlinear crystal is periodic polarized niobic acid
Lithium PPLN crystal or periodic polarized potassium titanyl phosphate PPKTP crystal.
8. the light source as described in any one of claim 2-3,5 and 6, which is characterized in that the laser crystal is neodymium-doped yttrium neodymium
Garnet Nd:YAG, Nd-doped yttrium vanadate Nd:YVO4, neodymium-doped yttrium-fluoride lithium Nd:YLF, neodymium-doped yttrium aluminate Nd:YAP, neodymium-doped magnesium aluminate
Lanthanum Nd:LMA, Nd-doped yttrium vanadate Nd:GdVO4.
9. a kind of display module, which is characterized in that including light source, optical fiber, actuator, the light source includes multiple such as claim
Multi-wavelength visible light light source described in any one of 1-8, the different colours that the multiple multi-wavelength visible light light source generates it is more
Visible light wavelengths are coupled into the optical fiber, and the actuator is for driving the optical fiber to swing in three dimensions.
10. a kind of projection display apparatus, which is characterized in that including one or more display modules as claimed in claim 9.
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| CN201910231484.3A CN109752908A (en) | 2019-03-26 | 2019-03-26 | A kind of multi-wavelength visible light light source, display module and projection display apparatus |
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Cited By (1)
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| CN111725697A (en) * | 2020-06-22 | 2020-09-29 | 中国航空工业集团公司北京长城计量测试技术研究所 | Multi-wavelength laser beam generation method and device |
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Application publication date: 20190514 |