CN1900805A - Method for preparing red-green-blue color laser display light source - Google Patents
Method for preparing red-green-blue color laser display light source Download PDFInfo
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- CN1900805A CN1900805A CN200610040808.8A CN200610040808A CN1900805A CN 1900805 A CN1900805 A CN 1900805A CN 200610040808 A CN200610040808 A CN 200610040808A CN 1900805 A CN1900805 A CN 1900805A
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- WSMQKESQZFQMFW-UHFFFAOYSA-N 5-methyl-pyrazole-3-carboxylic acid Chemical compound CC1=CC(C(O)=O)=NN1 WSMQKESQZFQMFW-UHFFFAOYSA-N 0.000 description 2
- 229910017502 Nd:YVO4 Inorganic materials 0.000 description 2
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- 229910012463 LiTaO3 Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 241001465805 Nymphalidae Species 0.000 description 1
- LNSNNRROEHVHIP-UHFFFAOYSA-N [K].[Ti].[O].P(O)(O)(O)=O Chemical compound [K].[Ti].[O].P(O)(O)(O)=O LNSNNRROEHVHIP-UHFFFAOYSA-N 0.000 description 1
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- QBLDFAIABQKINO-UHFFFAOYSA-N barium borate Chemical compound [Ba+2].[O-]B=O.[O-]B=O QBLDFAIABQKINO-UHFFFAOYSA-N 0.000 description 1
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Abstract
The display light source includes infrared laser, two blocks of non-linear frequency changer crystal, and three pieces of light intensity adjusted scan control unit. The laser supplies a light beam in fundamental frequency. The light beam irradiates a frequency changer crystal so as to generate new laser beam. Being irradiated by the new laser beam, the second frequency changer crystal generates three visible light beams, which are introduced to light intensity adjusted scan control units respectively. Emergence light beams from the light intensity adjusted scan control units form pattern needed. One block of non-linear frequency changer crystal carries conversion from first wavelength lambda i to second wavelength lambda g, and the other block of non-linear frequency changer crystal carries conversion from second wavelength lambda g to third wavelength lambda r and fourth wavelength lambda b.
Description
Technical field
The present invention relates to the preparation method of red-green-blue color laser display light source.
Background technology
Colored demonstration normally utilizes the mixing of three kinds of basic colors light to realize the output of full color.Three kinds of colors of RGB are to form three kinds of basic colors of visible light.Three kinds of color of light are mixed by different proportion and are realized any color.Under the ratio of specific RGB light, can mix and obtain white light output.The RGB light of high strength high repetition frequency is used to produce various static state or dynamic color picture in large-area display system and imaging system.Utilize the laser of three kinds of colors of RGB to realize that panchromatic demonstration is compared to the display system of various bulbs as light source, it is abundanter to have color, color saturation is advantages of higher more, the great technological development direction that becomes the display technique field is general, and basic colors is red, green, blue or bluish-green, purplish red, three kinds of colors of violet.Under the intensity of three kinds of suitable color of light, can realize the color output of needs.More typical display system is the picture that all produces a width of cloth light distribution by three kinds of basic colors light separately, just can obtain the image of a width of cloth full color when three pictures project to same zone simultaneously.The light source that display system adopted has a variety of, as bulb or combination LED etc.Available one or several laser instrument is as system source.
The applicant discloses some technical schemes in laser frequency and parametric process: as CN200510038121.6 is the method to set up of the high-efficient full solid-state quasi-white light laser of frequency-changer crystal with the cascade connection superlattice: the optical superlattice that adopts two sections different structure cascades is all solid state laser that nonlinear crystal produces accurate white light output, by the semiconductor laser instrument is pump light source, adopt dual wavelength (as 1342 and 1064nm) laserresonator produces dual-wavelength laser output; Insert by one that multichannel cascade optical superlattice produces the suitable red, green, blue three look laser of ratio in the temperature control furnace, be mixed into accurate white light.This nonlinear crystal is to be formed by two sections superlattice cascades, and first section superlattice realized accurate the frequency multiplication that is complementary simultaneously to the dual wavelength first-harmonic of first-harmonic light source output, obtains ruddiness and green glow; Connect with first section for second section, second section that want to finish second-harmonic red laser and long-wavelength infrared light with frequently produce blue light, second block of superlattice generally adopts the hyperchannel periodic structure so that obtain top efficiency and adjustment blue light and ratio red, green glow.
The dielectric body superlattice material of CN00119007.5 quasi-periodic structure, the preparation method is set, make electricdomain quasi-periodicity with ferroelectric single crystal material, the selection of its parameter is that reciprocal lattice vector satisfies accurate condition that is complementary in the coupling light parametric process in making between its turned letter: this quasi-periodic structure is by A, two primitives of B are pressed quasi-periodic sequence and are arranged formation, this sequence can obtain with the method for projection, the straight line that promptly to do a slope in a two-dimension square dot matrix be tan θ, view field's width is sin θ+cos θ, and to have constituted projected angle to the subpoint of this straight line be the two constituent element quasi-periodic sequences of θ to lattice point in the zone.The present invention realizes that with the quasi-periodic structure material the multiple accurate position of coupling paameter process is complementary.
CN01108024.8 is full-solid-state red, the blue two-color laser device of frequency-changer crystal with superlattice, the laser instrument of red blue dichromatism conversion outside the chamber with block period optical superlattice composition, by the semiconductor laser instrument is pump light source, the resonator cavity that constitutes 1.342 μ m laser together with the front surface plated film of mixing Nd:YVO4 crystal (3) and chamber mirror (5); Be the temperature control furnace (9) that 14.778 μ m LiTaO3 superlattice (8) place the pumping light path with a block period again.
Though it is full-solid-state red, the blue two-color laser device of frequency-changer crystal even the basic means of white light laser that said method provides superlattice, still must improve on cost and the practicality.
The objective of the invention is: under condition cheaply, provide one simple in structure, the RGB LASER Light Source of high-level efficiency and high brightness.Especially utilize an infrared laser that infrared light supply is provided, utilize one or two blocks of nonlinear optical crystals and infrared light effect to produce the output of redgreenblue light again.The object of the invention also is, can allow mixed light present white by wavelength and its intensity of controlling three coloured light, perhaps other random color.
Technical solution of the present invention is: the preparation method of red-green-blue color laser display light source, comprise infrared laser 110, two additive mixing crystal 114 and 116, and three light intensity regulating scanning monitors 122,124 and 126, wherein laser instrument 110 provides a branch of fundamental frequency light 111, incide in the frequency-changer crystal 114, produce new laser beam 113 from frequency-changer crystal 114, incide in second frequency-changer crystal 116, can outgoing three beams visible light 117,118 and 119 from frequency-changer crystal 116, it is introduced light intensity regulating scanning monitor 122,124 and 126 respectively.Form the pattern that needs after the light beam 123,125 of process light intensity regulating scanning monitor and 127 outgoing.
Comprise first wavelength X
iTo second wavelength X
gConversion, and from second wavelength X
gTo wavelength lambda
rWith the 4th wavelength X
bConversion.λ here
iBe the light of infrared wavelength, λ
r, λ
gAnd λ
bBe respectively red-green-blue light.
The RGB three-beam that produces is from the frequency-changer crystal outgoing, and they have intensity separately, under specific relative intensity, can mix the generation white light.
By exciting light λ
iBe converted to λ
gProcess, be to comprise that medium produces exciting light λ
i, finish λ by the another one medium again
iTo λ
gTransfer process.By exciting light λ
iBe converted to λ
gProcess, be a frequency multiplication process, i.e. 2 λ
g=λ
iBy exciting light λ
iBe converted to λ
gFrequency-changer crystal, can be nonlinear crystals such as KTP, LBO, BBO, PPSLT or Mg:PPSLT.
By second wavelength X
gProduce wavelength lambda with the frequency-changer crystal effect
rλ
rCan be λ
gProduce by the parametric oscillation process with frequency-changer crystal, produce λ simultaneously
Nir(λ
r＜λ
Nir).λ
rAlso can be λ
gProduce by the parameter production process with frequency-changer crystal, produce λ simultaneously
Nir(λ
r＜λ
Nir).
By λ
gTo λ
bTransfer process, be λ by the front
gTo λ
NirConversion, by λ
gAnd λ
NirHave an effect with frequency-changer crystal and to produce λ
bTotally two processes are finished.λ
bBe by λ
gAnd λ
NirWith frequency-changer crystal through and frequently process produce.
λ
gTo λ
rAnd λ
bFrequency conversion conversion crystal, can be nonlinear crystals such as PPSLT or Mg:PPSLT.
Comprise RGB light (λ to producing
r, λ
gAnd λ
b) modulate, form required display pattern by the RGB light after ovennodulation.
System: comprise that a laser instrument is used to produce exciting light λ
i, first frequency-changer crystal is used to finish λ
iTo λ
gConversion, second frequency-changer crystal is used to finish λ
gTo λ
rAnd λ
bFrequency inverted.
Laser instrument can be a pulsed laser.Exciting light λ
iBe the light of an infrared wavelength.
Second frequency-changer crystal comprises two parts, all is the superlattice structure by the preparation of farmland inversion technique, λ
gWith the effect generation λ of first
rAnd λ
Nir, λ
gAnd λ
NirProduce λ with second portion effect and frequency
b
Two parts length of second frequency-changer crystal is respectively l
1And l
2, can be by selecting l
1And l
2Size come the λ of control system outgoing
r, λ
gAnd λ
bThe relative intensity of light, thus the color of exporting mixed light can be controlled.Two end faces of second frequency-changer crystal can make crystal itself form an optical resonator by the method for plated film, make the flashlight λ in the parametric process
rResonance has improved conversion efficiency and stability therein, and system architecture also is simplified.
Can place one to several optical mirror slips at the two ends of second frequency-changer crystal, make it constitute resonator cavity, make the flashlight λ in the parametric process
rResonance therein.Can also comprise three intensity modulation scanning monitors, the RGB three-beam that is used for respectively preceding plane system being produced is modulated.
Can also comprise an electronic controller, be used for the intensity modulation scanning monitor is controlled, is that control signal passes to the intensity modulation scanning monitor by electronic controller with the information translation of want display image, it is controlled the RGB three-beam, produce corresponding image in the zone of needs.
Development along with laser technology and nonlinear optical material technology, the technology of making now all solid state infrared laser of high power is ripe, utilizes designed nonlinear crystal can realize effective conversion from infrared light to new wavelength light wave by accurate position (QPM) process that is complementary.The present invention relates to an infrared laser infrared light supply is provided, utilize one or two blocks of nonlinear optical crystals and infrared light effect to produce the output of redgreenblue light again.Can allow mixed light present white by wavelength and its intensity of controlling three coloured light, perhaps other random color.
Laser display system of the present invention has many good qualities compared to other display system.
1. this display system has higher efficient, and its output power can be approximately equal to the power of exciting light, so the conversion efficiency from electricity to output light can reach maximum.
2. this display system stability is fine.Its frequency-changer crystal is operated in more than the room temperature, can make the temperature fluctuation of frequency-changer crystal very little (as ± 0.1 ℃) by temperature regulating device.So the variation of ambient temperature is very little to the stability influence of system.The raising of frequency-changer crystal temperature also helps the serviceable life of crystal.
3. this display system can realize dynamic demonstration well, because the repetition frequency of laser can reach several ten thousand hertz, hundreds of thousands hertz or higher all can be realized up to continuous light output, so it can extraordinaryly realize fine and smooth dynamic menu, avoids flicker.
4. this display system can come good increase can show color gamut space by the selection to the redgreenblue optical wavelength.Can reach more than 70% of full gamut space.Can obtain the most real colour picture.
So the present invention can well be applied in fields such as color video demonstration and laser performance.
Description of drawings
Fig. 1 is the laser display system synoptic diagram with two frequency-changer crystals
Fig. 2 is the structural representation of second frequency-changer crystal 116
Fig. 3 is the laser display system synoptic diagram that frequency-changer crystal is included in laserresonator
Fig. 4 is the laser display system synoptic diagram of two frequency-changer crystal connected structures
Fig. 5 has reflection cavity laser display system synoptic diagram subjectively
Fig. 6 has reflection and divides optical cavity laser display system synoptic diagram subjectively
Embodiment
Done detailed introduction among detailed content of the present invention and characteristics thereof legend, description and the embodiment below.
For Fig. 1, display system 100 mainly comprises 110, two additive mixing crystal 114 of an infrared laser and 116, and three light intensity regulating scanning monitors 122,124 and 126.Laser instrument 110 provides a branch of fundamental frequency light 111, and the optical element 141 (as lens, polaroid, wave plate and wave filter etc.) by necessity incides
In the frequency-changer crystal 114, produce new laser beam 113 from first frequency-changer crystal 114, by optical element (as lens, polaroid, wave plate and wave filter etc.), incide in second frequency-changer crystal 116, can outgoing three beams visible light 117,118 and 119 from frequency-changer crystal 116, it is introduced light intensity regulating scanning monitor 122,124 and 126 respectively.Form the pattern that needs after the light beam 123,125 of process light intensity regulating scanning monitor and 127 outgoing.Display system 100 also comprises an electronic controller 120 (as a microprocessor), controls three light intensity regulating scanning monitors 122,124 and 126 by the information of want display pattern, thereby the colour that can produce required pattern shows.
In the course of the work, laser instrument 110 provides a fundamental frequency light 111, and wavelength is λ
i, through first frequency-changer crystal 114, with a part of λ
iBe converted to wavelength X
gLight.Comprise λ in the emergent light 113
iAnd λ
gThe laser of two kinds of frequencies.Make λ through optical element
gIncide in second frequency-changer crystal 116, in second frequency-changer crystal 116 with part λ
gLight is converted to λ
rAnd λ
bLight, the transfer process of these light will be described below.λ
r, λ
gAnd λ
bLight is from frequency-changer crystal 116 outgoing (117,118 and 119), light beam 117,118 and 119 incides respectively in light intensity regulating scanning monitor 122,124 and 126, electronic controller converts the image information of required demonstration to control signal and passes to the light intensity regulating scanning monitor, light beam is carried out intensity modulation on time and the space, constitute required pattern by light intensity regulating scanning monitor outgoing beam 123,125 and 127.The intensity modulation scanning monitor comprises digital microlens device, scanning lens device, grating controller or liquid crystal spatial light regulator etc.
Top λ
r, λ
gAnd λ
bRepresent the redgreenblue light wavelength respectively.λ for example
rBe the 600-700nm wavelength coverage, λ
gBe 500-560nm, λ
bBe 400-490nm.
λ in light beam 117,118 and 119
r, λ
gAnd λ
bThe relative intensity of light can change.For example: λ
r: λ
gCan be greater than 1 (as 1.2,1.4,2 etc.), λ
g: λ
bAlso can control the energy ratio of each coloured light by the change (as changing frequency-changer crystal temperature, incident optical power density etc.) of some conditions greater than 1 (as 1.2,1.4,2 etc.).Can make λ under given conditions
r: λ
g: λ
bEnergy reaches a predetermined value (as 2: 1.4: 1).In real work, λ
r, λ
gAnd λ
bWavelength and their relative intensity can be selected and controlled by some experiment conditions.So present shades of colour (as (in CIE dyeing coordinates) such as white, orange, purples) when they are mixed.
Laser instrument 110 is near infrared lasers, emission light beam 111, wavelength X
iCan be that 900nm is to 2000nm scope (as 1064nm).λ
iSelection be according to two frequency-changer crystal characteristics so that display system 100 output visible light (λ
r, λ
gAnd λ
bBe respectively the RGB look).
Laser instrument 110 is pulsed lasers, and repetition frequency is 1KHz or higher, and pulse width can be 1 to 100 nanosecond or higher.Under specific condition, also can be psec or subpicosecond etc.
Laser instrument 110 can provide and enough make frequency-changer crystal 114 and 116 that nonlinear effect generation λ takes place
r, λ
gAnd λ
bEnergy.The peak power that can export as laser instrument 110 is 10KW or higher (as 50KW, 100KW).Here peak power is relevant with pulse width (second) with single pulse energy (joule).
First frequency-changer crystal 114 passes through a nonlinear optical process with λ
iBe converted to λ
g, this process generally is frequency multiplication process, i.e. 2 λ
g=λ
iThe selection of frequency-changer crystal 114 and preparation are according to transfer process and λ
iWith λ
gWavelength determine.Frequency-changer crystal 114 can be KTP (phosphoric acid oxygen Titanium Potassium), LBO (three lithium borates), BBO (barium metaborate), PPSLT (period polarized chemical dosage ratio lithium tantalate) or Mg:PPSLT (the period polarized magnesium chemical dosage ratio lithium tantalate of mixing) etc.
Second frequency-changer crystal 116 is by the part λ of two nonlinear optical processs with incident
gLight wave is converted to λ
rAnd λ
bLight wave.For example pass through a parametric process with part λ
gBe converted to λ
rAnd λ
Nir, λ wherein
r＜λ
Nir, again through one and frequently process with λ
NirWith part λ
gProduce λ with frequency
b
Above-mentioned frequency-changer crystal can also use as CN200510038121.6 mixes Nd:YVO4 crystal cycle optical superlattice etc. with cascade connection superlattice as frequency-changer crystal, the dielectric body superlattice of CN00119007.5 quasi-periodic structure, CN01108024.8.
Frequency-changer crystal 116 can be an independent crystal, also can be to be combined by several crystal.Its selection is to determine according to the corresponding wavelength of conversion process and system that designs.Frequency-changer crystal 116 can be materials such as PPSLT or Mg:PPSLT.
In some cases, frequency-changer crystal 116 also comprises an optical resonator, in order to the light wave that produces one or several wavelength (as λ
r, λ
NirAnd λ
bDeng).Plate multilayer film as light-incident end, make it λ at frequency-changer crystal 116
rHigh reflection (as＞99%) is to λ
gHigh-penetration (as＞99%) also plates multilayer film at the outgoing end face, and this multilayer film is to λ
gHigh-penetration (as＞99%) is to λ
rPartial reflection (as＜95%) is to λ
bHigh-penetration (as＞99%).Frequency-changer crystal 116 itself has just formed the very simple and minimum optical resonator of length of a structure like this, is used to produce λ
rAnd λ
bAlso can form resonator cavity with several optical lenses in some cases, the parameter of their parameter and 116 two end faces of last faceted crystal is similar, so also can be used to produce λ
rAnd λ
b
Fig. 2 is the structural representation of frequency-changer crystal 116, and crystal 116 is made up of 210 and 220 two parts.Total length is l, and 210 partial-lengths are l
1, 220 partial-lengths are l
2, i.e. l
1+ l
2=l.Wherein 210 parts are with cycle λ by positive farmland 212 and counter-rotating farmland 214
1Cycle arrangement forms, and counter-rotating farmland 214 width are δ
1, positive farmland 212 width are λ
1-δ
1, 210 parts are to be used at λ
gThe effect of light wave produces parameteric light λ down
rAnd λ
Nir220 parts are with cycle λ by positive farmland 222 and counter-rotating farmland 224
2Cycle arrangement forms, and counter-rotating farmland 224 width are δ
2, positive farmland 222 width are λ
2-δ
2, 220 parts are to be used at λ
gAnd λ
NirThe effect of light wave produces λ with frequency down
bLight.Can pass through l
1And l
2Selection come the ratio of the RGB output light of controlling Design, thereby can make three coloured light mix the light that forms white light or other color.
The superlattice that the frequency-changer crystal of introducing previously 116 is made up of two periodic structures also can adopt structures such as quasi-periodicity, non-periodic or binary cycle to realize above-mentioned conversion process.The preparation method of superlattice is just more flexible like this.
First and second frequency-changer crystals 114 and 116 can be bulks, can be forms such as slab guide or fibre-optic waveguide also, can select according to different application needs.
First and second frequency-changer crystals 114 and 116 are operated in high temperature (being higher than room temperature, as 100 ℃, 150 ℃ or 200 ℃) by thermostat.For example crystal 114 and 116 is placed electronic heating apparatus, monitor crystal temperature effect by a thermopair, and feedback signal is provided, make crystal reach predetermined working temperature.
Numeral little (thoroughly) mirror chip space light regulator: the digital light exchange of digital micro-mirror chip pixel comprises an aluminum micro mirror, and size is approximately 13.7 μ m
2, can light be reflexed in two predetermined directions one according to following internal storage location, depend on the state of internal storage location. each sheet micro mirror is supported on the internal storage location by two foil hinge.Each sheet micro mirror can be controlled by the electromagnetic attraction that voltage difference produced at internal storage location two ends. and the minute surface anglec of rotation is ± 10 ° by mechanical braking.When internal storage location in "open" state, minute surface rotates to+10 °, when internal storage location in "off" state, minute surface rotates to-10 °.Illumination and optics unlike traditional optical projector contain a common optical axial, and the optical axial of digital micromirror device must have certain angle.The digital micro-mirror pixel utilizes micro mirror configuration angle to control the switch of light, after mixing light source and projecting lens, micro mirror reflexes to incident light on the projecting lens (if be in " open " state) or reflexes to extinction zone (if be in " pass " state). because the deflection angle of micro mirror is positive and negative 10 degree, if device is designed to projecting lens perpendicular to chip surface (0 degree), then the extinction zone is that Z-axis becomes the angle of 40 degree. each micro mirror can be controlled respectively in the micro mirror array..
The very exquisiteness of the structural design of digital micro-mirror pixel has very short mechanical switch time (being approximately 15 μ s) and optical transition time (being approximately 2 μ s).The switching time of minute surface is very fast, to such an extent as to can realize the gray level of image with pulse-length modulation (PWM).
Light intensity modulator also comprises scanning monitor, scanning lens device, grating controller or liquid crystal spatial light regulator, and its mechanism is micro mirror roughly the same.
Embodiment, laser instrument 110 are all solid state Nd:YAG laser instruments of a diode pumping, can produce the 10KHz or the 1064nm near infrared light of high repetition frequency more, and pulse width is about 20 nanoseconds.First frequency-changer crystal is the ktp crystal of one two class coupling, and being used for the 1064nm laser freuqency doubling is the green glow of 532nm.The 532nm green glow that produces, is girdled the waist about about 100m in second frequency-changer crystal through lens focus.Second frequency-changer crystal is QPM crystal (PPSLT).L wherein
1=25mm, cycle λ
1=11.7 μ m, δ
1=λ
1/ 2=5.85 μ m; l
2=15mm, cycle λ
2=8.5 μ m, δ
2=λ
2/ 2=4.25 μ m, crystal width 5mm, thickness 1mm.Whole crystal temperature effect remains on 160 ℃.Can calculate corresponding generation wavelength according to the dispersion equation and the QPM condition of top these data by the SLT crystal, promptly parameter ruddiness is that 633nm and frequency blue light are 459nm.Light-incident end at frequency-changer crystal plates multilayer film, make it to the high reflection of 633nm light (＞99%), to 532nm high-penetration (＞99%), also plate multilayer film at the outgoing end face, this multilayer film is to 633nm partial reflection (≈ 50%), to 459nm high-penetration (＞99%) to 532nm high-penetration (＞99%).Such second crystal itself has just formed an optical resonator, is used to produce ruddiness and blue light.Because it is all very little that the SLT crystal absorbs in these wavelength coverages, so the general power of RGB three light beams of outgoing can be approximately equal to the green glow power that incides second crystal.The power ratio of three-beam can be regulated by regulating methods such as crystal temperature effect or incident light size with a tight waist, under certain condition, can make the power ratio of the redgreenblue light of outgoing reach 2: 1.4: 1, at this moment three-beam mixes and will present white (the homenergic point in the CIE photometric system).The green peak power density of incident at this moment approximately is 40MW/cm
2, approximately be more than 5 times or 5 times of thresholding, this power density is safe for the SLT crystal, damages below the thresholding at it.
The cross section of general laser beam all is circular, we can make its cross section become axial ratio 3: 1,5: 1 or the ellipse of above ratio by the processing to light beam, incide in the frequency-changer crystal like this, not to be higher than its damage thresholding is under the prerequisite, and it can be applied under the high power conditions.
In display system 100, first and second frequency-changer crystals all place the laser instrument outside.They also can have other laying method, for example first crystal can be put into laser instrument, make intracavity frequency doubling, can improve conversion efficiency like this, have also simplified system light path simultaneously.As Fig. 3, display system 300 comprises 312, two frequency-changer crystals 314 of a laser instrument and 316, three intensity modulation scanning monitors 322,324 and 326.First frequency-changer crystal 314 places laser instrument 312 inside, and the optical wavelength of laser instrument 312 outgoing directly is exactly λ
gOther principle of work is the same with system 100.
Another method for designing is that first and second frequency-changer crystals are merged together, and realizes above-mentioned several conversion process with a crystal.For example among Fig. 4, display system 400 comprises 414, three intensity modulation scanning monitors of 412, one frequency-changer crystals of laser instrument 422,424 and 426.The first of frequency-changer crystal 414 finish with system 100 in 114 the same frequency multiplication processes, with λ
iLight is converted to λ
gLight, in addition a part finish with system 100 in 116 the same conversion process with part λ
gLight is converted to λ
rAnd λ
bLight.Doing like this can simplified system, but has also increased the preparation difficulty of frequency-changer crystal simultaneously.
In real work, display system can comprise some elements beyond the system of explaining previously 100,300 and 400.For example Fig. 5 increases an outgoing chamber mirror 518 with respect to system 100 in the display system 500.It places the back of second frequency-changer crystal 516, and mirror 518 surfaces are coated with multilayer film, and it is to λ
rLight partial reflection (as 50%) is to λ
gAnd λ
bLight high-penetration (as＞99%).Rear end face at crystal 5 16 just only need be coated with λ like this
r, λ
gAnd λ
bThe multilayer film of light high-penetration (as＞99%) gets final product, and is replaced 516 rear end face to form optical resonator by chamber mirror 518.More convenient to regulating resonator cavity like this.
In Fig. 6, display system 600 comprise a laser instrument 612 (as psec, high-peak powers such as accurate psec (as＞100KW) laser instrument), first and second frequency- changer crystals 614 and 616, three intensity modulation scanning monitors 622,624 and 626.Second portion l in the crystal 6 16 wherein
2Be positioned near laser instrument 612 1 ends l
1At far-end, and be coated with λ on the surface of its far-end
r, λ
gAnd λ
bHeight reflection (as＞99%) film of light.In addition, also added a multilayer film mirror (spectroscope) 618 in display system 600, it is between laser instrument 612 and first frequency-changer crystal.It is to λ
iLight high-penetration (as＞99%) is to λ
r, λ
gAnd λ
bThe high reflection of light (as＞99%).Catoptron (corner mirror) 628 is used to reflect λ
r, λ
gAnd λ
bLight enters intensity modulation scanning monitor 622,624 and 626.
Embodiment, laser instrument 612 are stand lock mould solid-state lasers, and its repetition frequency is greater than 10MHz.Second frequency-changer crystal 616 is QPM crystal, is coated with λ at its nearly laser instrument 612 1 ends
r, λ
gAnd λ
bThe multilayer film of high-penetration (as＞99%) is coated with λ at far-end
r, λ
gAnd λ
bThe multilayer film of high reflection (as＞99%).Near infrared light λ from laser instrument 612 outgoing
iThrough frequency multiplication after first frequency-changer crystal 614 is green glow λ
g, λ
gLight incides in second frequency-changer crystal 616, about 40-60m with a tight waist, and its peak power density can reach 1-10GW/cm
2, pass through the reflection of crystal 6 16 distal faces again, so finished the parameter transfer process twice, produce λ
rAnd λ
NirLight.Under high like this peak power density, conversion efficiency is very high.Finish before for the second time parametric process leaves crystal 6 16 rest parts λ
gλ with the parameter generation
NirLight is at l
2Part and frequency produce λ
bThe advantage of display system 600 is can be applied under the demonstration situation that requires high repetition frequency.
Aforesaid several display system is by producing redgreenblue laser, realizing what colour showed through necessary optical element.In addition, we also can utilize similar system to produce bluish-green, purplish red, three kinds of colors of violet and realize colored the demonstration.
Claims (10)
1, the preparation method of red-green-blue color laser display light source, comprise infrared laser (110), two additive mixing crystal (114 and 116), it is characterized in that comprising three light intensity regulating scanning monitors (122,124 and 126), wherein laser instrument (110) provides a branch of fundamental frequency light (111), incide in the frequency-changer crystal (114), produce new laser beam (113) from frequency-changer crystal (114), incide in second frequency-changer crystal (116), from frequency-changer crystal (116) outgoing three beams visible light (117,118 and 119), it is introduced light intensity regulating scanning monitor (122 respectively, 124 and 126); Through forming the pattern that needs after light beam (123, the 125 and 127) outgoing of light intensity regulating scanning monitor; Wherein an additive mixing crystal carries out first wavelength X
iTo second wavelength X
gConversion, and the additive mixing crystal carries out from second wavelength X
gTo wavelength lambda
rWith the 4th wavelength X
bConversion; λ here
iBe the light of infrared wavelength, λ
r, λ
gAnd λ
bBe respectively red-green-blue light; The RGB three-beam that produces is from the frequency-changer crystal outgoing.
2, the preparation method of red-green-blue color laser display light source according to claim 1 is characterized in that by exciting light λ
iBe converted to second wavelength X
gProcess, be to comprise that medium produces exciting light λ
i, finish first wavelength X by the another one medium again
iTo λ
gTransfer process.By exciting light λ
iBe converted to λ
gProcess, be a frequency multiplication process, i.e. 2 λ
g=λ
iBy exciting light λ
iBe converted to λ
gFrequency-changer crystal be KTP, LBO, BBO, PPSLT or Mg:PPSLT nonlinear crystal.
3, the preparation method of red-green-blue color laser display light source according to claim 1 is characterized in that by second wavelength X
gProduce wavelength lambda with the frequency-changer crystal effect
rProcess be λ
gProduce by the parametric oscillation process with frequency-changer crystal, produce λ simultaneously
Nir, and λ
r＜λ
NirBy λ
gTo λ
bTransfer process, be λ by the front
gTo λ
NirConversion, by λ
gAnd λ
NirHave an effect with frequency-changer crystal and to produce λ
bTotally two processes are finished; λ
bBe by λ
gAnd λ
NirWith frequency-changer crystal through and frequently process produce; λ
gTo λ
rAnd λ
bFrequency conversion conversion crystal, be PPSLT or Mg:PPSLT nonlinear crystal.
4, the preparation method of red-green-blue color laser display light source according to claim 1 is characterized in that the RGB light λ to producing
r, λ
gAnd λ
bModulate, form required display pattern by the RGB light after ovennodulation; The intensity modulation scanning monitor comprises digital microlens device, scanning lens device, grating controller or liquid crystal spatial light regulator.
5, the preparation method of red-green-blue color laser display light source according to claim 1 is characterized in that placing one to several optical mirror slips at the two ends of second frequency-changer crystal, makes it constitute resonator cavity, makes the flashlight λ in the parametric process
rResonance therein.
6, the preparation method of red-green-blue color laser display light source according to claim 1, it is characterized in that being provided with controller, be used for the intensity modulation scanning monitor is controlled, is that control signal passes to the intensity modulation scanning monitor by electronic controller with the information translation of want display image, it is controlled the RGB three-beam, produce corresponding image in the zone of needs.
7, the preparation method of red-green-blue color laser display light source according to claim 1 is characterized in that frequency-changer crystal (116) in an optical resonator, in order to produce the light wave of one or several wavelength.
8, the preparation method of red-green-blue color laser display light source according to claim 7 is characterized in that plating multilayer film at the light-incident end of frequency-changer crystal (116), makes it to λ
rHigh reflection is to λ
gHigh-penetration also plates multilayer film at the outgoing end face, and this multilayer film is to second wavelength X
gHigh-penetration is to wavelength lambda
rPartial reflection is to λ
bHigh-penetration; Frequency-changer crystal (116) itself has just formed an optical resonator that length simple in structure is little like this, is used to produce λ
rAnd λ
b
9, the preparation method of red-green-blue color laser display light source according to claim 7 is characterized in that forming resonator cavity with several optical lenses, and the parameter of its parameter and (116) two end faces of described crystal is similar, is used to produce two wavelength X
rAnd λ
bEmission.
10, the preparation method of red-green-blue color laser display light source according to claim 7 is characterized in that frequency-changer crystal comprises two parts, all is the superlattice structure by the preparation of farmland inversion technique, λ
gWith the effect generation λ of first
rAnd λ
Nir, λ
gAnd λ
NirProduce λ with second portion effect and frequency
b, two parts length of frequency-changer crystal is respectively l
1And l
2, by selecting l
1And l
2Size come the λ of control system outgoing
r, λ
gAnd λ
bThe relative intensity of light, thus the color of exporting mixed light can be controlled.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610040808.8A CN1900805A (en) | 2006-07-25 | 2006-07-25 | Method for preparing red-green-blue color laser display light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610040808.8A CN1900805A (en) | 2006-07-25 | 2006-07-25 | Method for preparing red-green-blue color laser display light source |
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| Publication Number | Publication Date |
|---|---|
| CN1900805A true CN1900805A (en) | 2007-01-24 |
Family
ID=37656721
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610040808.8A Pending CN1900805A (en) | 2006-07-25 | 2006-07-25 | Method for preparing red-green-blue color laser display light source |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950919A (en) * | 2010-09-07 | 2011-01-19 | 长春理工大学 | Full solid serial pump laser |
| CN106646501A (en) * | 2015-11-03 | 2017-05-10 | 赫克斯冈技术中心 | Optoelectronic measuring device |
| CN112136017A (en) * | 2018-05-18 | 2020-12-25 | 美杜莎眼 | Light shield apparatus |
| CN113314939A (en) * | 2021-05-27 | 2021-08-27 | 长春理工大学 | Multi-wavelength mid-infrared laser energy ratio regulation and control amplifier based on Nd-MgO-APLN crystal |
| CN113314940A (en) * | 2021-05-27 | 2021-08-27 | 长春理工大学 | Multi-wavelength mid-infrared laser pulse train cavity emptying laser based on Nd, MgO and APLN crystals |
| CN113759644A (en) * | 2020-06-02 | 2021-12-07 | 华为技术有限公司 | Light source system and laser projection display device |
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2006
- 2006-07-25 CN CN200610040808.8A patent/CN1900805A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950919A (en) * | 2010-09-07 | 2011-01-19 | 长春理工大学 | Full solid serial pump laser |
| CN106646501A (en) * | 2015-11-03 | 2017-05-10 | 赫克斯冈技术中心 | Optoelectronic measuring device |
| US11035935B2 (en) | 2015-11-03 | 2021-06-15 | Hexagon Technology Center Gmbh | Optoelectronic surveying device |
| CN112136017A (en) * | 2018-05-18 | 2020-12-25 | 美杜莎眼 | Light shield apparatus |
| CN113759644A (en) * | 2020-06-02 | 2021-12-07 | 华为技术有限公司 | Light source system and laser projection display device |
| WO2021244488A1 (en) * | 2020-06-02 | 2021-12-09 | 华为技术有限公司 | Light source system and laser projection display device |
| CN113759644B (en) * | 2020-06-02 | 2022-12-27 | 华为技术有限公司 | Light source system and laser projection display device |
| EP4152092A4 (en) * | 2020-06-02 | 2023-11-08 | Huawei Technologies Co., Ltd. | Light source system and laser projection display device |
| CN113314939A (en) * | 2021-05-27 | 2021-08-27 | 长春理工大学 | Multi-wavelength mid-infrared laser energy ratio regulation and control amplifier based on Nd-MgO-APLN crystal |
| CN113314940A (en) * | 2021-05-27 | 2021-08-27 | 长春理工大学 | Multi-wavelength mid-infrared laser pulse train cavity emptying laser based on Nd, MgO and APLN crystals |
| CN113314939B (en) * | 2021-05-27 | 2022-06-03 | 长春理工大学 | Multi-wavelength mid-infrared laser energy ratio regulation and control amplifier based on Nd-MgO-APLN crystal |
| CN113314940B (en) * | 2021-05-27 | 2022-06-03 | 长春理工大学 | Multi-wavelength mid-infrared laser pulse train cavity emptying laser based on Nd, MgO and APLN crystals |
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