CN105573037A - Laser light source and laser projection equipment - Google Patents
Laser light source and laser projection equipment Download PDFInfo
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- CN105573037A CN105573037A CN201610120030.5A CN201610120030A CN105573037A CN 105573037 A CN105573037 A CN 105573037A CN 201610120030 A CN201610120030 A CN 201610120030A CN 105573037 A CN105573037 A CN 105573037A
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/208—Homogenising, shaping of the illumination light
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0933—Systems for active beam shaping by rapid movement of an element
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/48—Laser speckle optics
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2013—Plural light sources
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
- G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
Abstract
The invention discloses a laser light source. The laser light source comprises a blue laser device and a red laser device which respectively emit blue laser light and red laser light, and further comprises a fluorescence wheel which is excited to emit green fluorescence, wherein a first diffusion part and a second diffusion part are arranged on a transmission light path of the at least one color laser light, the first diffusion part and the second diffusion part are respectively driven to do motion, motion tracks are different, the space position scope with phase change increases when laser beams sequentially pass through the two diffusion parts, the probability that correlation degrees among phases after change are relatively low increases, the quantity of random phase patterns can be greatly improved, the eye integration effect is utilized to alleviate the speckle removal effect, so the relatively good speckle purpose is realized. The invention further discloses laser projection equipment equipped with the laser light source.
Description
This application claims the right of priority of the Chinese invention application 201511013799.9 of the denomination of invention " a kind of LASER Light Source and laser projection device " that on Dec 31st, 2015 proposes.
Technical field
The present invention relates to field of projection display, particularly relating to a kind of LASER Light Source for projecting and laser projection device.
Background technology
Laser is a kind of high brightness, and high directivity sends the light source of monochromatic coherent light bundle, due to the plurality of advantages of laser, in recent years by gradually as light source applications in projection display technique field.The high coherence of laser also brings speckle effect when laser projection shows, so-called speckle refers to that coherent source is when irradiating coarse object, after scattering light, because its wavelength is identical, phase-constant, interference will be produced in space, in space, some part interferes long mutually, have part to interfere to disappear mutually, final result is on screen, occur granular light and dark spot, these unfocused spots are in blink states at human eye, long-time viewing easily produces dizzy sense of discomfort, more cause the deterioration of projected image quality, reduce the viewing experience of user.
From the principle suppressing speckle, generally include, use the method for space superposition to make speckle refinement; The average method of operate time makes speckle superpose, and utilizes human eye integral action to weaken; Use and expand the coherence that spectrum width reduces LASER Light Source, and the method for operating frequency superposition weakens the coherence of light source.Prior art is in laser delivery optics, the diffusion sheet of rotation or diffusion sheet is used to carry out dissipation spot, mainly make use of above-mentioned space superposition and time averaging principle, by light beam is split multiple beamlet, by speckle refinement, and the speckle pattern of different time point is carried out superposition homogenize, by the integral action in human eye, speckle phenomena is desalinated, weakens.But the dissipation spot effect of diffusion sheet is relevant with mode of motion with the dispersion angle that diffusion sheet itself is arranged in prior art, in actual applications, limited efficiency, effectively cannot improve the display quality of projected picture.
Summary of the invention
The invention discloses a kind of LASER Light Source and laser projection device, comprise blue laser and red laser, send blue laser and red laser respectively; Also comprise fluorescent wheel, described fluorescent wheel is used for being excited to send green fluorescence, by arranging the first proliferation part and the second proliferation part in the laser delivery optics of at least one color, two proliferation parts are driven to carry out moving and movement locus is different, the laser beam phase change making these two proliferation parts of transmission is diversity, is beneficial to the dissipation spot effect improving LASER Light Source.
The present invention seeks to be achieved through the following technical solutions:
A kind of two-color laser light source, comprises blue laser and red laser, sends blue laser and red laser respectively; Also comprising fluorescent wheel, sending green fluorescence for being excited;
In the transmission light path of the laser of at least one color, arrange the first proliferation part, the second proliferation part, two proliferation parts are respectively by driving campaign, and the first proliferation part is different with the movement locus of the second proliferation part;
Preferably, the first proliferation part and the second proliferation part front and back in the transmission light path of the laser of at least one color are disposed adjacent.
Or preferably, the first proliferation part and the second proliferation part in the middle of the transmission light path of the laser of at least one color every setting.
Preferably, the first proliferation part and the second proliferation part carry out linear reciprocating vibration by driving respectively.
Or preferably, the first proliferation part and the second proliferation part one of them rotate by driving, another is undertaken swinging or translation by driving.
Preferably, the first proliferation part and the second diffusion part direction of vibration orthogonal.
Preferably, one of at least the first proliferation part and the second proliferation part do aperiodicity motion.
Preferably, the first proliferation part and the second proliferation part all do cyclical movement.
Preferably, the first proliferation part and the second proliferation part are diffusion sheet or diffusion sheet.
Present invention also offers a kind of laser projection device, comprise LASER Light Source, ray machine, camera lens, LASER Light Source provides illumination for ray machine, and ray machine is modulated light beam of light source, and exports camera lens to and carry out imaging, be projected to projection medium and form projected picture, LASER Light Source is the LASER Light Source of above-mentioned arbitrary technical scheme.
The one or more technical scheme of the embodiment of the present invention, at least has following technique effect or advantage:
The LASER Light Source that embodiment of the present invention technical scheme provides, by arranging the speckle device that disappears in laser delivery optics, this speckle device that disappears comprises two proliferation parts set gradually, two proliferation parts move respectively under the driving of driver part, thus compared to using diffusion sheet or the diffusion sheet of a slice rotary motion in prior art, laser beam can through double scattering, homogenize effect gets a promotion, and, because the movement locus of two proliferation parts is different, thus the track plane surrounded after the superposition of the movement locus of two proliferation parts or scope are greater than track plane or the scope of former first proliferation part or the second proliferation part, and be also greater than superimposed motion track plane or the scope of two proliferation parts with same motion trajectory, make laser beam successively through two proliferation parts, the locus scope that phase place changes increases, and the lower probability of the degree of correlation between phase place after changing increases, namely the probability producing random phase increases, greatly can increase the quantity of random phase pattern, utilize the integral action of human eye, speckle effect is weakened, reach the object of the spot that preferably dissipates, high-quality LASER Light Source can be provided to throw light on, simultaneously, speckle effect weaken the display quality that improve projected picture.
The laser projection device that embodiment of the present invention technical scheme provides, applies above-mentioned LASER Light Source scheme, can weaken the speckle effect of projected picture, improves the display quality of projected picture, strengthens the competitive power of product.
Accompanying drawing explanation
Fig. 1 is LASER Light Source configuration diagram in the embodiment of the present invention one;
Fig. 2 is the spot apparatus structure schematic diagram that dissipates in the embodiment of the present invention one;
Fig. 3 is the speckle device mode of motion schematic diagram that disappears in the embodiment of the present invention one;
Fig. 4 is the speckle device matching movement locus schematic diagram that disappears in the embodiment of the present invention one;
Fig. 5 A is the speckle device another matching movement locus schematic diagram that disappears in the embodiment of the present invention one;
Fig. 5 B is the speckle device matching movement locus schematic diagram again that disappears in the embodiment of the present invention one;
Fig. 6 is LASER Light Source configuration diagram in the embodiment of the present invention two;
Fig. 7 A is the speckle device one mode of motion schematic diagram that disappears in the embodiment of the present invention three;
Fig. 7 B is the another mode of motion schematic diagram of speckle device that disappears in the embodiment of the present invention three;
Fig. 8 is LASER Light Source configuration diagram in the embodiment of the present invention three;
Fig. 9 is LASER Light Source configuration diagram in the embodiment of the present invention four;
Figure 10 is LASER Light Source configuration diagram in the embodiment of the present invention five;
Figure 11 is laser projection device structural representation in the embodiment of the present invention six.
Embodiment
In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail, and obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Below in conjunction with accompanying drawing, the technical scheme that the embodiment of the present invention provides is described in detail.
Embodiment one
The embodiment of the present invention one provides a kind of LASER Light Source, as shown in Figure 1, the present embodiment one discloses a kind of two-color laser light source, laser instrument specifically comprises blue laser 11 and red laser 12, both homeotropic alignments, send blue laser and red laser respectively, wherein blue laser is as excitation source.And fluorescent wheel 20, fluorescent wheel 20 substrate is provided with green emitting phosphor, excites send green fluorescence for Stimulated Light, thus and blue laser, red laser forms three primary colours.Wherein, be provided with the speckle device 30 that disappears in the transmission light path after red laser and blue laser close light, the speckle device 30 that disappears comprises before and after the first proliferation part 31 and the second proliferation part 32, two proliferation part and being disposed adjacent.As shown in Figure 2, the speckle device 30 that disappears also comprises the first driver part 33, second driver part 34, first proliferation part 31 and the second proliferation part 32 also drive by the first driver part 33 and the second driver part 34 respectively simultaneously and move, and the first proliferation part 31 is different with the movement locus of the second proliferation part 32.
Particularly, in the present embodiment light source, the blue laser that blue laser 11 sends and the red laser that red laser 12 sends, first beam shaping is carried out through contracting bundle parts, the comparatively large spot sent by laser instrument carries out reducing rear being just beneficial to be transmitted in optical mirror slip, improves light treatment effect, and, the more direct object of beam shaping meets fluorescent wheel to be excited required spot size, such as about 0.8mm diameter.Conventional pack parts comprise condenser lens or telescopic system (being made up of a slice convex lens and a slice concavees lens), adopt telescopic system in the present embodiment.Particularly, every road laser first carries out convergent beam through the convex lens that a slice is large, by closing the identical road of light parts 40 compound direction, then through a slice concavees lens.Particularly, closing light parts 40 can be dichroic mirror, can transmitting blue laser, and reflection Red laser, or be tool spaced catoptron group unit, hollow out or transparent region allow blue laser transmission, reflecting optics reflection Red laser, thus the mutually perpendicular light beam of two-way becomes a road light transmits.Close at two-way in the transmission of light owing to being provided with the speckle device 30 that disappears of the first proliferation part 31 and the second proliferation part 32 composition, the period can be lighted according to blue laser and red laser, carry out dissipation spot when blue laser or this two proliferation parts of red laser transmission.
The specific works process of speckle device 30 of disappearing is as follows: as shown in Figure 2, the speckle device 30 that disappears also comprises control assembly 35, control assembly 35 carries out signal control to the first actuated components 33 and the second actuated components 34 respectively, drive current is accordingly exported according to signal, such as different PWM ripples, or the software program of correspondence controls, the first driver part 33 and the second driver part 34 is made to drive corresponding proliferation part to do different motions.Control assembly 35 can be CUP controller, is that two driver parts export control signal simultaneously.
Owing to setting gradually before and after the first proliferation part 31 and the second proliferation part 32, thus blueness or red laser light beam can pass through two proliferation parts successively, through twice diffusion, improve the homogenize degree of light beam.Because light beam is first after the first proliferation part 31 spreads, degree of divergence increases, preferably, the face type of the second proliferation part 32 is a bit larger tham the first proliferation part 31, all can receive the laser beam in certain degree of divergence from the first proliferation part 31 outgoing.
And, first proliferation part 31 and the second proliferation part 32 are simultaneously and respectively by the driving campaign of the first driver part 11 and described second driver part 21, thus laser beam is successively by the proliferation part of two motion states, motion proliferation part compared to static setting proliferation part except change space phase except, laser beam can also be made to produce multiple random phase pattern, be conducive to the dissipation spot effect improving laser, and in embodiments of the present invention, first proliferation part 31 is different with the movement locus of the second proliferation part 32, the track plane surrounded after the movement locus superposition of two proliferation parts or scope are greater than track plane or the scope of former first proliferation part or the second proliferation part, and be also greater than superimposed motion track plane or the scope of two proliferation parts with same motion trajectory, because two proliferation parts are all random for the change of laser beam phase place, this makes laser beam successively through two proliferation parts, in the track plane or scope of larger area, the locus scope that phase place changes increases, the probability that the degree of correlation between phase place after change is less increases, namely the probability producing random phase increases, greatly can increase the quantity of random phase pattern, utilize the integral action of human eye, speckle effect is weakened, reach the object of good dissipation spot.
Particularly, first proliferation part 31 and the second proliferation part 32 can be diffusion sheet or diffusion sheet, wherein, the incidence surface of diffusion sheet or diffusion sheet arranges scattering microstructure, or, the incidence surface of diffusion sheet or diffusion sheet and exiting surface all arrange scattering microstructure, can improve laser beam through the scattering degree after these parts.And the first proliferation part 31 and the second proliferation part 32 can be circular, also can be rectangle, or oval, as long as be beneficial to the laser beam all receiving front end incidence, are not specifically limited at this to shape.
First actuated components 33 and the second actuated components 34 can be solenoid or piezoelectric ceramics, and by a clamp structure (not shown), such as carriage framework, be connected with above-mentioned first proliferation part 31 and the second proliferation part 32, and be controlled by control assembly 35, along with the change of drive current, proliferation part is carried out to the driving of different motion track.
It should be noted that, movement locus is represented by direction of motion, forms of motion and motion amplitude.Above-mentioned movement locus difference refers to arbitrary difference in direction of motion, forms of motion and motion amplitude three factors, or appoints both different, or the situation that three is all different.The first diffusion sheet 31 and the second diffusion sheet multiple different motion track combination mode will be introduced respectively below.
And, in the specific implementation, the first proliferation part 31 and the second proliferation part 32, in order to make the light transmission rate of proliferation part higher, the incident direction of corresponding laser, the first proliferation part 31 and the second proliferation part 32 all move in the plane of the incident direction perpendicular to laser.
And, it will be appreciated by those skilled in the art that based on above-mentioned setting, when the first proliferation part and the second proliferation part are disposed adjacent, and consistent through the transmission direction of the laser beam of two proliferation parts, then the plane of movement of the first proliferation part and the second proliferation part is parallel to each other.When the first proliferation part and the second proliferation part interval are arranged, when being applied in concrete dissipation spot light path, due to the change in laser optical path direction, although the plane of movement of the first proliferation part and the second proliferation part and laser optical path transmission direction keep vertical relation, but two planes may be parallel, also may be an angle, the angle that this and laser optical path occur to transfer be relevant, and the effect of two proliferation part superposition dissipation spots does not have larger difference.
In embodiments of the present invention, be brief description, be disposed adjacent with the first proliferation part and the second proliferation part, plane of movement is parallel to each other as example is introduced.
As shown in Figure 3, the incident direction of corresponding laser, the first proliferation part 31 and the second proliferation part 32 for Z axis, set up coordinate system with the optical axis of laser incident direction, first proliferation part 31 and the second proliferation part 32 respectively along perpendicular to Z axis and be parallel to each other two plane a, b move.This setup can make proliferation part carry out transmission with maximum useful area to blue or red laser light beam, improves the light diffuser efficiency to laser beam.
On plane a, b, the first proliferation part 31 and the second proliferation part 32 carry out linear reciprocating vibration by driving respectively.Wherein, the direction of vibration of two linear reciprocating vibration is different, as shown in Figure 3, first proliferation part 31 does linear reciprocating vibration along movement locus 1, second proliferation part 32 does linear reciprocating vibration along movement locus 2, the extended line of movement locus 1 and movement locus 2 is angle, and angle can be acute angle or right angle.
When angle is right angle, namely the direction of motion of two proliferation parts is orthogonal, can be specifically, and the first proliferation part 31 carries out of reciprocating vibration along horizontal X direction of principal axis, second proliferation part 32 carries out of reciprocating vibration along vertical Y direction, thus both movement locus extended lines are mutually vertical.Certainly, also can be the first proliferation part 31 along vertical Y direction, the second proliferation part carries out linear reciprocating vibration along horizontal X direction of principal axis, and under both of these case, effect is similar, does not limit concrete performance.
The linear reciprocating vibration of two proliferation parts of above-mentioned both direction can be uniform motion, also can be non-uniform movement.
The amplitude of the linear reciprocating vibration of two proliferation parts of above-mentioned both direction can be identical, also can be different, and amplitude range is preferably more than and equals 0.1mm.
And, the linear reciprocating vibration of two proliferation parts of above-mentioned both direction can be all periodic, or can one of them linear reciprocating vibration be also periodic, and another is aperiodicity, or the linear reciprocating vibration of these two parts is all acyclic.The random mode of motion of aperiodicity can increase the randomness that beam phase changes, and reduces because the stable hot spot pattern that causes of cyclical movement.
The motion process of the first proliferation part 31 and the second proliferation part 32 is described in detail below in conjunction with accompanying drawing 3 and Fig. 4.
Linear reciprocating vibration is carried out along orthogonal both direction with the first proliferation part 31 and the second proliferation part 32, and the amplitude size of two linear oscillators is identical, and to be uniform motion be example, then all carry out in the process of moving at the first proliferation part 31 and the second proliferation part 32, by the first proliferation part 31 and the second proliferation part 32 respective movement locus projection in one plane, this projection plane is perpendicular to laser beam incident direction of principal axis, movement locus after matching is also projected in same plane, thus along the Z axis of laser beam incident direction, the movement locus that two parts move contrail fitting is separately formed as shown in Figure 4.Wherein initial point O is the mid point of the first proliferation part 31 and the second proliferation part 32 linear reciprocating vibration, and suppose that the amplitude size of two linear oscillators is R, R gets and is greater than 0.1mm value range, and along with the increase of R value, being conducive to dissipation spot still can to increase facula area.A1, a2, a3, b1, b2, b3, c1, c2, c3 represent the incident point of the first proliferation part 31 and the different spatial of the second proliferation part 32 in respective movement locus and in matching movement locus respectively.
And the frequency of linear oscillator is also not specifically limited, and according to product needed and hardware driving ability, the frequency that the embodiment of the present invention preferably gets linear oscillator is 60 ~ 240HZ.It will be appreciated by those skilled in the art that vibration frequency can get 50HZ or other numerical value too.
According to diagram, the first proliferation part 31 moves along movement locus 1 in a1 to a3 scope, and the distance of a1 or a3 to center origin O is R, and the second proliferation part 32 moves along movement locus 2 in b1 to b3 scope, and the distance of b1 or b3 to center origin O is R.
Thus when the first proliferation part 31 moves to a1 point, and when the second diffusion motion parts 20 are positioned at center origin O position, i.e. peak swing position, left side, then matching movement locus point is a2 position, the amplitude position place namely divided along X-axis level to the second from left.When the first proliferation part 31 moves to a2 point, and when the second diffusion motion parts 20 move to b2 position, then matching movement locus point is c2 position.
In like manner, when the first proliferation part 31 moves to center origin O position, and when the second diffusion motion parts 20 move to b1 position, namely along Y direction upwards peak swing position, then matching movement locus point is b2 position.When the first proliferation part 31 moves to a1 or a3 point, and when the second diffusion motion parts 20 move to b1 position, then matching movement locus point is c3 or c1 position.
Thus, circle is as shown in Figure 4 formed after the movement locus of the first proliferation part 31 and the second proliferation part 32 carries out matching, namely movement locus can be expressed as: X2+Y2=c2, wherein, X represents the point in movement locus 1, Y represents the point in movement locus 2, C=R, the area that this movement locus surrounds or scope represent the first proliferation part 31 and the second proliferation part 32 can carry out phase change locus range size to light beam, because two proliferation parts are random for the change of beam phase, when the locus scope that phase place can change is larger, the probability that can produce incoherent random phase just increases, , thus the quantity of the final independent random phase place pattern produced will increase greatly, utilize the integral action of human eye, speckle effect can weaken greatly.
And, when the first proliferation part 31 is identical with the forms of motion of the second proliferation part 32, such as, in above-mentioned Fig. 2 example, all do linear reciprocal movement, but when direction of motion is in a certain angle, especially, when in vertical angle, two proliferation parts strengthen the probability of the random phase that light beam produces.This is because, due to diffusion sheet or diffusion sheet, the change to beam phase is random, when moving in orthogonal thereto direction, multiple phase change is produced in each direction, according to Vector operation and probability statistics principle, the degree of correlation between phase place after these changes, lower compared to the degree of correlation along same direction of movement phase place, in other words the degree of correlation be 0 likelihood ratio larger, thus the probability that random phase produces improves, the quantity of random phase pattern also just increases greatly, thus, when the first proliferation part 31 and the second proliferation part 32 carry out linear oscillator along orthogonal both direction simultaneously, can be dissipated by the quantity increasing random phase pattern spot preferably.
In another is specifically implemented, first proliferation part 31 and the second proliferation part 32 direction of motion still orthogonal, but motional amplitude is different, or both one of be uniform motion, another is non-uniform movement, or both one of for cyclical movement, another is aperiodicity motion, or be aperiodicity motion, movement locus face then after two proliferation part matchings may not be then disc, may be such as elliptical area as shown in Figure 5A, or the track plane of the face that surrounds of the irregular curve shown in Fig. 5 B or other shapes.
From aforementioned, the track plane of matching movement locus or scope represent the locus range size that phase place can change, therefore the track plane area of the first proliferation part, the second proliferation part motion fitting formation is larger, thus the locus scope that phase place can change will be larger, the probability producing the lower phase place of multiple degree of correlation will increase, more easily form multiple independently random phase pattern, be beneficial to eliminating coherence.
The first proliferation part 31 and the second proliferation part 32 is illustrate only along orthogonal direction at embodiment of the present invention Fig. 4, and amplitude size is identical, uniform motion when matching formed circular trace face, the direction of motion of the first proliferation part and the second proliferation part is not specifically limited at this, amplitude size, moving periodicity, as long as the track plane that the area of expectation is enough large can be formed, and be not only confined to the shape of track plane, the effect of good eliminating coherence can be played equally for laser beam, weaken the speckle phenomena of projected picture.
Analyzed from foregoing, after the speckle device 30 that disappears, the coherence of red laser or blue laser weakens, thus is beneficial to the display quality improving projected picture.
Blue laser successively after two proliferation parts or red laser re-shoot fluorescent wheel 20 after convex lens 21 are assembled.In the present embodiment one, fluorescent wheel 20 is transmission-type fluorescent wheel, there is transparency carrier, transparency carrier is provided with green phosphor layer, green phosphor layer arranged outside has dichroic film, can be anti-reflection to laser, and green fluorescence is reflected, thus green fluorescence can from fluorescent wheel 20 back side outgoing.The transparency carrier of fluorescent wheel 20 is also provided with transmission area, particularly, because red laser and blue laser are all incident on fluorescent wheel real estate, this transmission area comprises red transmission district and blue transmission district particularly, blue laser and red laser is transmitted successively for the rotation along with fluorescent wheel, thus can the input red, green, blue three primary colours light of timing from fluorescent wheel 20 back side.
Three primary colours light re-shoots optical wand 50 after the collimation lens set 22 at fluorescent wheel 20 back side collimates, and optical wand 50 belongs to a part for ray machine, is conventional even smooth parts.Because optical wand has ranges of incidence angles requirement, the three primary colours light after collimation usually also needed through a slice convergent lens 51 before incident optical wand, to reduce the incident angle of light beam, improved the incident efficiency of light beam.
The two-color laser light source that the embodiment of the present invention provides, the speckle device that disappears is provided with due in the light path that exports after blue laser and red laser close light, thus all can carry out efficient eliminating coherence to blue laser and red laser, the projected picture speckle effect that two-color laser light source projects is formed weakens greatly, improve image display quality, enhance product competitiveness.
Embodiment two
The embodiment of the present invention two provides another two-color laser light source, and as shown in Figure 6, comprise blue laser group 11, red laser group 12, is set up in parallel, and sends blue laser and red laser respectively.Blue laser and red laser are first through telescopic system 13, and 14 carry out beam shaping, and respectively after contracting bundle, blue laser incident fluorescence wheel 20, a red laser then independent road exports conjunction light parts 40 to.In embodiments of the present invention, fluorescent wheel 20 is transmission-type fluorescent wheel, comprise phosphor region, be coated with green emitting phosphor, and transmission area, for transmitting blue laser, thus along with the rotation of fluorescent wheel, green fluorescence and blue laser are successively through the outgoing of the fluorescent wheel back side, and the collimation lens set through fluorescent wheel 20 back side collimates.According to optical path direction conversion needs, blue laser after collimation and green fluorescence reflex to through plane mirror and close light parts 40, preferably, closing light parts 40 is dichroic mirror, can transmitting blue laser and green fluorescence, and reflect another road red laser, thus the light of three kinds of colors carries out conjunction light transmits in the same direction.
After the actinic light of three kinds of colors, the speckle device 30 that disappears is provided with in the light path exported, particularly, the structure of speckle device 30 of disappearing and the course of work can with the speckle devices 30 that disappears introduced in embodiment one, comprise two respectively along orthogonal both direction, the proliferation part carrying out linear reciprocating vibration, identical or approximate dissipation spot effect can be reached, also can be different from embodiment one.
In embodiments of the present invention, composition disappears, and the first proliferation part 31 of speckle device 30 is different with the movement locus of the second proliferation part 32 to be specially, one of two proliferation parts one of them rotate by driving, another is undertaken swinging or translation by driving, because the forms of motion of two proliferation parts is different, movement locus both inevitable is different, thus the movement locus scope of two movement locus superposition matching formation is greater than the movement locus scope of arbitrary proliferation part in two proliferation parts, also the movement locus scope after the matching of two proliferation parts doing same movement is greater than, thus and the lower probability of the degree of correlation between phase place after changing increases, namely the probability producing random phase increases, multiple independently random phase pattern can be produced.
Specifically, as shown in Figure 7 A, first proliferation part 31 is perpendicular in the plane a of Z axis, oscillating motion is done along the vertical bisector of proliferation part or a certain side (when proliferation part is square part), second proliferation part 32 is perpendicular in the plane b of Z axis, and the center along proliferation part rotates.
Or as shown in Figure 7 B, the first proliferation part 31, perpendicular in the plane a of Z axis, does translational motion along X-axis horizontal direction or vibrates back and forth, the second proliferation part 32 is perpendicular in the plane b of Z axis, and the center along proliferation part rotates.
Or the first proliferation part 31 rotates, the second proliferation part 32 swings or translation.
Above-mentioned first proliferation part 31 and the rotation of the second proliferation part 32 or the frequency of swing or translational motion are preferably also 60HZ ~ 240HZ.
Wherein, the amplitude of swing is at more than 0.1mm.
Thus, due to the difference of two proliferation part forms of motion, make movement locus different, when laser beam is successively through this two proliferation parts, two proliferation parts can produce multiple space phase in a different direction on the one hand, on the other hand, produce the degree of correlation between the space phase difference with mode of motion and space scope, the degree of correlation lower or be 0 probability increase, thus multiple separate random phase pattern can be produced, weaken the coherence of light beam, improve dissipation spot effect.
In the embodiment of the present invention three, the swing of the first proliferation part 31 or translation, and second rotary motion of proliferation part 32, it can be cyclical movement, also can move for aperiodicity, it can be uniform motion, also can be non-uniform movement, wherein, above-mentioned concrete motion process parameter, the shape of final matching path curves can be had influence on, thus Curves surrounds the size of track area, this matching movement locus face is preferably symmetric figure or centrosymmetric image, the track plane of symmetric figure can provide more locus, and it is relatively uniform, thus be conducive to the increase of phase change kind and be uniformly distributed.
Thus, in the embodiment of the present invention, by at blue laser, the speckle device 30 that disappears is provided with in the conjunction light output light path of red laser and green fluorescence, first proliferation part 31 is different with the forms of motion of the second proliferation part 32, cause movement locus different, as the above analysis, preferably dissipation spot effect can be reached too, therefore, the double-colored light source that the embodiment of the present invention three provides, also all efficient eliminating coherence can be carried out to blue laser and red laser, the projected picture speckle effect that two-color laser light source projects is formed weakens greatly, improve image display quality, enhance product competitiveness.
Embodiment three
In the embodiment of the present invention three, provide another kind of two-color laser light source, as shown in Figure 8, comprise blue laser 11, red laser 12, both are set up in parallel, and carry out contracting bundle respectively through contracting bundle parts 13,14.Wherein, blue laser, as exciting light source, is incident to fluorescent wheel 20, the independent road of red laser.
In embodiments of the present invention, dissipation spot parts comprise the first proliferation part 31 and the second proliferation part 32.
In embodiments of the present invention, fluorescent wheel 20 is reflective fluorescent wheel, and comprise phosphor region and transmission area, phosphor region is at least coated with green emitting phosphor.Fluorescent wheel front is provided with collimation lens set 22, and the back side is provided with blue light relaying loop 21, and blue light relaying loop 21 comprises another collimation lens set successively, multi-disc catoptron, condenser lens, and a slice dichroic mirror 41.
When blue laser is through conjunction light parts 40, when being incident to the phosphor region of fluorescent wheel 20, excite generation green fluorescence.Green fluorescence is reflected from fluorescent wheel 20 front outgoing by aluminium base, and through collimation lens set 22 collimated incident to closing light parts 40, closing light parts 40 can reflection green fluorescence.
Consider that the speckle effect susceptibility of human eye for red laser is higher than for blue laser, therefore, preferably, the first proliferation part 31 is provided with in the transmission light path of red laser, thus red laser is carrying out first time diffusion dissipation spot through telescopic system 14 contracting Shu Houzai by the first proliferation part, the first proliferation part 31 can be linear oscillator, translation, swing or rotary motion, dissipation spot can be carried out to red laser.Rear arrival catoptron 15 is penetrated by the first proliferation part 31, beam direction is transferred, dichroic mirror 41 is arrived after reflection, dichroic mirror 41 can reflect blue laser, carries out transmission to red laser, thus the laser of two kinds of colors all enters directive conjunction light parts 40, particularly, close light parts plated film, can transmission red laser and blue laser, and reflection green fluorescence.After ECDC light parts 40 close light, three coloured light export along identical direction, and arrive the second proliferation part 32 after a slice convex lens are assembled, and after the diffusion of the second proliferation part, final incident optical wand 50 carries out homogenize output.
Particularly, the second proliferation part 32 is different from the movement locus of the first proliferation part 31, can be that forms of motion is different, or identical forms of motion, and direction of motion is different with motion amplitude, or can forms of motion, the identical only motion amplitude difference of direction of motion.
In embodiments of the present invention, red laser successively through the first proliferation part 31 and the second proliferation part 32, can improve the effect of dissipation spot.Blue laser can also play certain dissipation spot effect through the diffusion of the second proliferation part 32, above-mentioned set-up mode can be reached the balance of the speckle effect of two kinds of color laser, is applicable to the visual demand of beholder.
First proliferation part 31 and the second proliferation part 32 can adopt a kind of described scheme of embodiment in embodiments of the present invention, also the scheme described in embodiment two can be adopted, with in embodiment one or embodiment two unlike in embodiment of the present invention scheme, first proliferation part 31 and the second proliferation part 32 are interval setting, be separated setting in other words, preferably, two diffusion sheet parts are all arranged at the imaging surface place of system optics, can improve the efficiency of dissipation spot.The course of work of two proliferation part dissipation spots and principle see described in embodiment one or embodiment two, can not repeat them here particularly.
Embodiment four
In the embodiment of the present invention four, two parts of the speckle device 30 that disappears, the first proliferation part 31 and the second proliferation part 32 are that interval arranges or is separated setting, in similar embodiment three, namely between two proliferation parts, are also provided with other opticses.Particularly, as shown in Figure 9, the first proliferation part 31 is arranged in the output light path after blue laser and red laser conjunction light, and before incident fluorescence wheel 20.And the second proliferation part 32 is arranged at before blue laser and red laser and green fluorescence enter optical wand 50, after convergent lens 51 can be positioned at, bar inlet, as Fig. 9 shows, (not shown) before also can being positioned at convergent lens 51.
Particularly, the structure of the first proliferation part 31 and the second proliferation part 32, forms of motion can adopt in embodiment one or adopt the scheme of the speckle device that disappears described in embodiment two.The content identical with scheme in embodiment one or embodiment two does not repeat them here.
With embodiment one, embodiment two unlike, first proliferation part 31 and the second proliferation part 32 are no longer concentrated and are disposed adjacent, multiple optics is also provided with between two parts, and the transmission direction of laser beam there occurs 90 degree of turnovers, therefore the plane of movement of the first proliferation part 31 and the second proliferation part 32 is no longer parallel to each other, but the plane of movement of each proliferation part all keeps vertical with the incident light axis direction of laser beam, and the movement locus of two proliferation parts is different, therefore, the first proliferation part 31 in the embodiment of the present invention and the second proliferation part 32 still can reach the dissipation spot effect identical with embodiment one or embodiment two, its principle of work and process do not repeat them here.
Embodiment five
The embodiment of the present invention five provides another two-color laser light source, as shown in Figure 10.
In embodiments of the present invention, still adopt the two-color laser device that blue laser 11 and red laser 12 form, identical with embodiment three or embodiment four is, disappear the first proliferation part 31 of speckle device and the second proliferation part 32 is also that interval is arranged, different from embodiment one, position relationship that the front and back of embodiment two are disposed adjacent.
With similar in embodiment three, the first proliferation part 31 is provided with in the transmission light path of red laser, thus red laser is carrying out first time diffusion dissipation spot through telescopic system 14 contracting Shu Houzai by the first proliferation part, and directive closes light parts 40, specifically can be dichroic mirror, dichroic mirror reflects red laser.
Blue laser is after telescopic system 13 contracts bundle, incident fluorescence wheel 20 after facula area is reduced further through convergent lens, in embodiments of the present invention, fluorescent wheel 20 adopts transmission-type fluorescent wheel, transmission-type fluorescent wheel eliminates the loop of blue laser than reflective fluorescent wheel, and transmission-type fluorescent wheel is exported by the back side to carry out conjunction light, and reflective fluorescent wheel needs to arrange conjunction light microscopic sheet in fluorescent wheel front, conjunction light is carried out to the blue laser that fluorescence and the turnover of reflection return, therefore compared with the embodiment of the present invention three, the embodiment of the present invention five adopts transmission-type fluorescent wheel that optical mirror slip quantity can be made to reduce, light source framework is succinct.Can output blue laser and green fluorescence successively through transmission-type fluorescent wheel 20 back side.
Blue laser and green fluorescence are also incident to dichroic mirror, by dichroic mirror transmission after collimation and reflection.Final red laser, blue laser and green fluorescence realization conjunction light, be also provided with the second proliferation part 32, first proliferation part 31 in conjunction light output light path and the second proliferation part 32 forms the speckle device 30 that disappears.
In the embodiment of the present invention five, the structure of the first proliferation part 31 and the second proliferation part 32 and forms of motion can be identical with embodiment one or embodiment two or embodiment three or embodiment four scheme, and its principle of work and process repeat no more.
In embodiments of the present invention, with similar in embodiment three, red laser successively through the first proliferation part 31 and the second proliferation part 32, can improve the effect of dissipation spot.Blue laser can also play certain dissipation spot effect through the diffusion of the second proliferation part 32, above-mentioned set-up mode can be reached the balance of the speckle effect of two kinds of color laser, is applicable to the visual demand of beholder.
As the remodeling of the embodiment of the present invention, in order to improve the dissipation spot effect of blue laser, can take turns before 20 at incident fluorescence and the static diffusion sheet of a slice is set, particularly can between fluorescent wheel front and condenser lens, static diffusion sheet can increase the space phase of blue laser on the one hand, has certain dissipation spot effect, can carry out diffusion homogenize to laser beam simultaneously, improve the homogeneity of optical density distribution, improve the conversion efficiency of fluorescence excitation.
Embodiment six
The embodiment of the present invention six provides a kind of laser projection device, can be laser movie theatre or laser television, or other laser projection instruments, as shown in figure 11, comprise LASER Light Source 1, ray machine 2, camera lens 3, LASER Light Source 1 provides illumination for ray machine 2, and ray machine 2 pairs of light beam of light source are modulated, and export camera lens 3 to and carry out imaging, be finally projected to projection Media Ratio as display frame on screen or body of wall.Particularly, camera lens 3 is ultrashort zoom lens, and this laser projection device is ultrashort out-of-focus projection equipment.Wherein, LASER Light Source in the present embodiment six can be arbitrary described LASER Light Source in above-described embodiment one to embodiment five, its identical content parts repeat no more, embodiment of the present invention laser projection device can weaken the speckle effect of projected picture, improve the display quality of projected picture, strengthen the competitive power of product.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disk memory and optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the process flow diagram of the method for the embodiment of the present invention, equipment (system) and computer program and/or block scheme.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block scheme and/or square frame and process flow diagram and/or block scheme and/or square frame.These computer program instructions can being provided to the processor of multi-purpose computer, special purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computing machine or other programmable data processing device produce device for realizing the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
These computer program instructions also can be loaded in computing machine or other programmable data processing device, make on computing machine or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computing machine or other programmable devices is provided for the step realizing the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a LASER Light Source, comprises blue laser and red laser, sends blue laser and red laser respectively; Also comprise fluorescent wheel, described fluorescent wheel is used for being excited to send green fluorescence;
It is characterized in that,
In the transmission light path of the laser of at least one color, arrange the first proliferation part, the second proliferation part, described first proliferation part and the second proliferation part are respectively by driving campaign, and described first proliferation part is different with the movement locus of the second proliferation part.
2. LASER Light Source according to claim 1, is characterized in that, described first proliferation part and described second proliferation part front and back in the transmission light path of the laser of described at least one color are disposed adjacent.
3. LASER Light Source according to claim 1, is characterized in that, described first proliferation part and described second proliferation part in the middle of the transmission light path of the laser of described at least one color every setting.
4. LASER Light Source according to claim 1, is characterized in that, described first proliferation part and the second proliferation part carry out linear reciprocating vibration by driving respectively.
5. LASER Light Source according to claim 1, is characterized in that, described first proliferation part and described second proliferation part one of them rotate by driving, another is undertaken swinging or translation by driving.
6. LASER Light Source according to claim 4, is characterized in that, described first proliferation part and described second diffusion part direction of vibration orthogonal.
7. the LASER Light Source according to claim 4 or 5, is characterized in that, one of at least described first proliferation part and described second proliferation part do aperiodicity motion.
8. the LASER Light Source according to claim 4 or 5, is characterized in that, described first proliferation part and described second proliferation part all do cyclical movement.
9. LASER Light Source according to claim 1, is characterized in that, described first proliferation part and the second proliferation part are diffusion sheet or diffusion sheet.
10. a laser projection device, comprise LASER Light Source, ray machine, camera lens, described LASER Light Source provides illumination for described ray machine, and described ray machine is modulated light beam of light source, and export described camera lens to and carry out imaging, be projected to projection medium and form projected picture, it is characterized in that, described LASER Light Source is the arbitrary described LASER Light Source of power 1-9.
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| CN201610120031.XA Active CN105573038B (en) | 2015-12-31 | 2016-03-03 | Laser light source and laser projection equipment |
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| CN113641062B (en) * | 2021-08-16 | 2023-03-14 | 深圳市火乐科技发展有限公司 | Diffuser assembly, light beam speckle eliminating device and projector |
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| Publication number | Publication date |
|---|---|
| CN105573037B (en) | 2017-09-01 |
| CN105629647B (en) | 2017-11-17 |
| CN105573038A (en) | 2016-05-11 |
| CN105573038B (en) | 2017-05-24 |
| CN105629647A (en) | 2016-06-01 |
| CN105573039A (en) | 2016-05-11 |
| CN105573039B (en) | 2017-09-01 |
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Effective date of registration: 20180509 Address after: 266599 No. 218, Qian Wan Gang Road, Huangdao District, Qingdao, Shandong. Patentee after: Qingdao Hisense laser display Limited by Share Ltd Address before: 266100 Zhuzhou Road, Laoshan District, Qingdao, Shandong Province, No. 151 Patentee before: Hisense Group Co., Ltd. |
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