CN201302105Y - Area light source - Google Patents

Abstract

The utility model provides an area light source with uniform illuminance and extremely low coherence, which comprises: a plurality of lasers; a plurality of optical fibers; a scanning device and a laser receiving device, wherein, each optical fiber comprises a receiving end and a transmitting end, each receiving end is used to receive laser sent by one of the plurality of lasers, and a plurality of sub-fiber bundles are formed by the plurality of optical fibers at the transmitting ends of the optical fibers, and the plurality of sub-fiber bundles are arranged in a linear optical fiber array; the scanning device is used to scan the linear laser transmitted by the plurality of sub-fiber bundles along the direction vertical to arrangement direction ofthe linear optical fiber array; and the laser receiving device is used to receive the scanned laser so as to form a scanning face. The area light source has good decoherence effects and satisfies various laser projection sites; saves a shimming device, simplifies the systems structure and reduces the system volume; and does not have high requirements on processing difficulty and installation precision to the scanning device, reduces the system cost and improves the reliability.

Description

A kind of area source

Technical field

The utility model relates to laser field, is specifically related to the area source in the laser display field.

Background technology

Laser display is because advantages such as its big colour gamut, long-life and low energy consumption are considered to the developing direction of Display Technique of future generation.Because laser is coherent light, if its processing is not directly carried out projection as light source, can occur the laser interference speckle pattern of Luminance Distribution inequality on the screen, promptly so-called speckle causes the picture quality variation, has a strong impact on onlooker's impression.Therefore eliminating coherence is a step essential in the existing laser display technology, needs in this external laser light projection display system to obtain therefore the even area source that throws light on of light valve is carried out the shimming shaping to laser beam and also be absolutely necessary.

Publication number is the patent of CN200976052 adopt multifiber to be coupled respectively a light beam that a plurality of laser instruments send, utilize the minute differences and the irrelevant phase relation of frequency between the laser that a plurality of laser instruments send to realize to the laser eliminating coherence, after with the shimming apparatus for shaping of integrating rod or fly's-eye lens and so on laser beam being transformed into the even brightness area source then light valve is thrown light on, the speckle that the method for this eliminating coherence comes down to each laser instrument is produced superposes, human eye is discovered less than speckle, its effect aligns the incompatible theory of projection field and still can accept, but in the back projection occasion, still can produce the appreciable speckle pattern of human eye, in the process of this external above-mentioned acquisition area source, owing to used independent shimming apparatus for shaping, increased loss, made system bulk increase simultaneously laser.

Notification number is that the patent of CN2585265 shines single-point laser on the polygonal mirror that rotates at a high speed, because each face of this polygonal mirror and the inclination angle of rotor shaft direction increase progressively one by one, make scanning light beam form uniform scanning plane, again because each scanning element arrives face to be illuminated constantly in difference, do not satisfy the temporal coherence of coherent light, therefore bright the no coherent fringe that forms.Though this method is applicable to the realization of area source in the one-wavelength laser demonstration, multiple surface rotating mirror is the dozens of face at least, and up to a hundred faces are mutually certain angle again between each face at most, and it is comparatively difficult to make processing get up; In addition, single-point laser in this method is a Gaussian beam, its cross section light distribution is inhomogeneous, and next line must have with lastrow and considerablely overlappingly could form the uniform scanning plane of illumination during scanning, causes the rotation precision of multiple surface rotating mirror also must highly could guarantee above-mentioned effect like this.

Summary of the invention

Therefore, in order to overcome the prior art deficiency, the utility model provides that a kind of coherence is low, the illumination uniform surface light source.

The utility model provides a kind of area source, comprises

A plurality of laser instruments are used to produce multiple laser;

Multifiber, every described optical fiber comprises receiving terminal and exit end, the described receiving terminal of described multifiber is used to receive the laser that described a plurality of laser instrument sends, and described multifiber is arranged in the wire fiber array at described exit end place, described Line of light fibre array output linear laser;

Scanning means is used to scan the described linear laser of described Line of light fibre array outgoing; And

Light receiving element is used to receive the scanning plane that described linear laser forms after described scanning means scanning.

Above-mentioned area source wherein, also comprises apparatus for shaping, is arranged between described Line of light fibre array and the described scanning means, is used for described linear laser shaping to the predetermined angle of divergence and predetermined length-width ratio.

Above-mentioned area source, wherein, described a plurality of laser instruments are many primary colours laser instrument or mono-colour laser.

Above-mentioned area source, wherein, the quantity of each primary colours laser instrument of described many primary colours laser instrument is by the separate unit laser power decision of vision white balance power ratio principle and each primary colours.

Above-mentioned area source, wherein, the arranging situation of the exit end of the described optical fiber in the described Line of light fibre array satisfies uniform color mixture principle and vision white balance power ratio principle.

Above-mentioned area source, wherein, described light receiving element is DMD light valve or polarizing component.

Above-mentioned area source, wherein, the linearly polarized light that produces by described polarizing component be used to throw light on LCD light valve or LCOS light valve.

Above-mentioned area source, wherein, the scanning direction of described linear laser is perpendicular to the line orientations of described Line of light fibre array.

Above-mentioned area source, wherein, described scanning means is vibratile right-angle prism or vibratile polygonal prism.

Above-mentioned area source, wherein, described light entrance face and the light-emitting face that vibrates right-angle prism or vibratile polygonal prism is in a certain angle.

Above-mentioned area source, wherein, described scanning means is the tetragonal prism of band rotating shaft or the polygonal prism of band rotating shaft.

Above-mentioned area source, wherein, the light entrance face of the polygonal prism of the tetragonal prism of described band rotating shaft or band rotating shaft is parallel with light-emitting face.

Above-mentioned area source, wherein, the vibration frequency 〉=30Hz of the tetragonal prism of described vibratile right-angle prism or vibratile polygonal prism or band rotating shaft or the polygonal prism of band rotating shaft.

Above-mentioned area source, wherein, the light entrance face of described scanning means and light-emitting face are coated with the anti-reflection film of the laser place wave band that produces at described a plurality of laser instruments.

Area source of the present utility model has following beneficial effect:

1. eliminating coherence is effective.Because the appearing and subsiding of the speckles of any two row is independent of each other on the scanning plane, so the zone that speckle occurs greatly reduces, and the utility model device can satisfy laser orthographic projection and back projection occasion;

2. owing to the area source that utilizes the utility model device to obtain forms for continuous sweep, make in the time of eliminating coherence that the area source illuminance uniformity is also high, therefore the utility model device has saved shimming device, has simplified system architecture, helps reducing system bulk.

3. the process that forms scanning plane is continuous sweep, is progressive formation between the up-downgoing, compares with simple scan being become the technology of scanning plane, does not have the design that needs up-downgoing overlapping, and is therefore less demanding to the running precision of scanning means, and reliability improves; And employed scanning means is in the optical field optical element commonly used, and the processing aspect does not have special requirement yet, so cost is very low.

Description of drawings

Fig. 1 is for being used for area source of the present utility model in the schematic diagram of a kind of embodiment of tricolor laser optical projection system;

Fig. 2 is a kind of arranging situation schematic diagram of wire fiber array in the area source of the present utility model;

Fig. 3 is with the operation principle schematic diagram of right-angle prism as scanning means;

Fig. 4 is will be with the tetragonal prism of the rotating shaft operation principle schematic diagram as scanning means;

Fig. 5 is will be with the polygon tilting mirror of the rotating shaft operation principle schematic diagram as scanning means;

Fig. 6 is for being used for area source of the present utility model in a kind of schematic diagram of embodiment of tricolor laser optical projection system of the DMD of employing light valve;

Fig. 7 is for being used for area source of the present utility model in a kind of schematic diagram of embodiment of tricolor laser optical projection system of the LCD of employing light valve.

The specific embodiment

Embodiment 1:

Fig. 1 is for being used for area source of the present utility model in the schematic diagram of a kind of embodiment of tricolor laser optical projection system.Embodiment shown in Fig. 1 comprises red-light source 101, green-light source 102, blue light source 103, optical fiber sleeve 104, Line of light fibre array 105, apparatus for shaping 106, scanning means 107, DMD light valve 108, TIR (Total internal reflection) prism 114, projection objective 109 and screen 110.It is that multi-laser among the CN200976052 is as light source that the utility model adopts publication number, wherein red-light source 101, green-light source 102 and blue light source 103 all include a plurality of semiconductor lasers (3 laser instruments that each primary light source has only been drawn and has been used to illustrate among Fig. 1, down together), the quantity of described each primary colours semiconductor laser is by the power decision of required vision white balance power ratio and each primary colours semiconductor laser of separate unit, this is a known technology in this area, here will not give unnecessary details, three primary light source and DMD light valve 108 be coupling ground time division multiplex mutually.Those skilled in the art will be understood that, when being used to produce monochromatic scanning plane, a plurality of semiconductor lasers in the present embodiment can be the laser instrument of wavelength of the same race, accordingly, its quantity is not subjected to the restriction of vision white balance power ratio principle, and should decide according to the power of the laser instrument of required general power of reality and this wavelength of separate unit.In the present embodiment, being provided with of red-light source 101 is as follows: the laser emitting end of red light semiconductor laser 111 is placed with shaping lens 112, it is used for laser beam shaping that red light semiconductor laser 111 is sent so that coupled into optical fibres 113 better, optical fiber is corresponding one by one with semiconductor laser, shaping lens 112 can be a slice GRIN Lens or non-spherical lens or cylindrical lens, also can be the set of lenses that comprises the multi-disc spherical lens.The setting of green-light source 102 and blue light source 103 and red-light source 101 are basic identical.The optical fiber of all laser of all kinds that have been coupled carries out boundling by optical fiber sleeve 104, and optical fiber sleeve 104 is nonessential parts, if number of fibers is less, length is shorter, does not cause the mixed and disorderly of space, also can carry out boundling to it.The principle of following RGB three primary colours uniform color mixture at fiber-optic output rearranges into Line of light fibre array 105 with all optical fiber, and the light beam that Line of light fibre array 105 sends forms the wire white light by apparatus for shaping 106 backs.The wire white light scans along the line orientations perpendicular to above-mentioned wire white light through scanning means 107, guiding through TIR prism 114 forms the uniform scanning plane of illumination on DMD light valve 108, the image that produces after 108 modulation of DMD light valve projects on the screen 110 by projection objective 109 and forms image.

The utility model device is scanned into the wire white light in the process of flat light source can realize eliminating coherence, its concrete principle is as described below: arbitrary constantly independent, has only delegation's scanning light beam in 108 of the DMD light valves, also only interfere at this delegation place, and it is constantly independent other one, light beam is scanned another row on the DMD light valve 108, interfere at another row, accordingly, the appearing and subsiding of the speckle of any two row also is independent of each other on the screen, the zone that speckle occurs greatly reduces, and because human eye vision persists effect, 110 interior speckles of whole screen obtain time integral, and speckle is not discovered, this eliminating coherence method be on the basis of multi-laser to the further weakening of speckle, its final effect is better than only using the method for multi-laser.Based on above-mentioned scanning imagery principle, picture homogeneous degree also is guaranteed, and need not to establish in addition shimming device.

The arranging situation that is arranged in the Line of light fibre array 105 of fiber-optic output is shown specifically at Fig. 2.Below with reference to plane coordinate system XOY the arrangement of described fiber-optic output is elaborated.Line of light fibre array 105 is arranged along directions X by experimental process fibre bundle 201 and is formed (in order to illustrate that 6 sub-fibre bundles only draw among Fig. 2), and optionally, it encapsulates by shell 202.Sub-optical fibre bundle 201 is made up of the multifiber of conduction tricolor laser, and be shaped with crust 203 parcel, alignment of the end face of described multifiber and the principle of following uniform color mixture are arranged in order, in sub-optical fibre bundle 201 inside, space between the optical fiber can be filled to avoid it to misplace with glue 204, the quantity ratio of the optical fiber of conduction RGB laser should be identical with RGB number of lasers ratio in the three primary light source in the sub-optical fibre bundle 201, makes that from the light of Line of light fibre array 105 emissions be uniform white light.Illustrate, according to vision white balance power ratio principle, the ratio of RGB number of lasers is 6 (R) in the three primary light source that present embodiment adopts: 6 (G): 7 (B), sub-optical fibre bundle 201 is made up of 19 optical fiber, wherein the quantity of rgb light fibre is respectively 6 (R), 6 (G) and 7 (B), and the ratio of RGB number of lasers is similarly 6 (R) in its ratio and the three primary light source: 6 (G): 7 (B); Optionally, optical fiber in the sub-optical fibre bundle 201 can be arranged in hexagon, number of fibers according to reality can be made variation, for example line up square or rectangle etc., as long as the optical fiber arranging situation meets uniform color mixture principle and vision white balance power ratio principle in wire fiber array 105 inner adjacent areas, its specific implementation is then unrestricted in a word.Accordingly, when whether the optical fiber in judging Line of light fibre array 105 is arranged according to uniform color mixture principle and vision white balance power ratio principle, also adjacent several sub-optical fibre bundles can be lumped together and add up, as long as the ratio of the fine quantity of rgb light that adjacent several sub-optical fibre bundles are total satisfies 6 (R): 6 (G): 7 (B), for example the quantity of three primary colours optical fiber is 3 (R) root in a sub-fibre bundle, 3 (G) root, 3 (B) root, quantity at the intrafascicular three primary colours optical fiber of its adjacent sub-optical fibre is respectively 3 (R) root, 3 (G) root, 4 (B) root, it is 6 (R) that such two sub-fibre bundles are added up described ratio altogether: 6 (G): 7 (B), arrange the Line of light fibre array 105 that forms like this and meet the utility model spirit too.Need to prove that given ratio 6 (R): 6 (G): 7 (B) only are as example, can adopt different proportionings according to different needs here.

Generally, what the end face of Line of light fibre array 105 sent is directrix shape white light, its angle of divergence is bigger, if directly with its scanning and shine on the DMD light valve 108, then cause it that certain light-receiving scope is arranged because the optical extend of DMD light valve 108 is limited, segment beam can not enter the admittance scope of DMD light valve 108, thereby cause the loss of luminous energy.Laser is Gaussian beam, the product of its beam waist and the angle of divergence is a constant, so more little its angle of divergence with a tight waist of laser beam is big more, therefore often described wire white light being carried out shaping makes its angle of divergence be no more than the admittance scope of DMD light valve 108, but too small the causing again of the angle of divergence covered multirow or multiple row pixel, made dissipation spot effect good inadequately again; Therefore will be according to the actual conditions of optical projection system to the suitable shaping of described directrix shape white light, make the admittance scope that dissipation spot effect is more satisfactory and have most light to enter DMD light valve 108, apparatus for shaping also can be made certain adjustment to the length-width ratio of the scanning plane that forms in addition.Adopt apparatus for shaping 106 (being generally cylindrical lens) that described directrix shape white light is carried out shaping in the present embodiment, it is transformed into the wire white light of the default angle of divergence and default length-width ratio.Certainly, and nonessential employing apparatus for shaping 106, shaping feature can be integrated on other parts fully for some particular cases, if the angle of divergence of described directrix shape white light is just suitable, also can not adopt apparatus for shaping 106 under some situation.

Fig. 3 is a kind of scanning means operation principle schematic diagram of the present utility model.Scanning means can be common refraction or reflective optical devices, for example the vibratile right-angle prism 301 shown in Fig. 3.As shown in Figure 3, the directrix shape white light 303 that Line of light fibre array 105 sends forms wire white light 304 and perpendicular to the right angle face A incident of right-angle prism 301 after apparatus for shaping 106 shapings, wire white light 304 forms irradiating light beam 305 by inclined-plane C outgoing and falls on the DMD light valve 108 behind right-angle prism 301 deviations, wherein, the face A of right-angle prism 301 and face C are coated with the anti-reflection film at RGB three look laser place wave bands.Right-angle prism 301 is driven by vibrating device 302 (described vibrating device can be motor or piezoelectric ceramics or arbitrarily can be by the device of assigned frequency vibration) and along vibrating perpendicular to the direction of face B, also promptly vibrates along the Y direction.When right-angle prism 301 was mobile from top to bottom, outgoing beam 305 was also scanning formation one frame scan face from top to bottom on the overall optical valve face on the DMD light valve 108; Subsequently when right-angle prism 301 then when mobile from bottom to top, outgoing beam 305 then scans the overall optical valve face from bottom to top and forms the next frame scanning plane on light valve, so move in circles and be formed on the scanning plane of the uninterrupted demonstration of human eye on DMD light valve 108.The Oscillation Amplitude of right-angle prism 301 should make the scanning area of outgoing beam 305 on DMD light valve 108 cover whole light valve just fully, and moving up and down of right-angle prism 301 should be tried one's best at the uniform velocity so that the illuminance that obtains on the DMD light valve 108 is even; Because right-angle prism 301 moves up and down and once forms 2 frame scan faces, so the vibration frequency of right-angle prism 301 equal described scanning plane per second frame number 1/2nd, when scanning plane frame number during more than or equal to 60 frames/second, human eye can not produce the sensation of film flicker, accordingly, the vibration frequency of right-angle prism 301 is answered 〉=30Hz, and preferred, described vibration frequency is 30Hz to 50Hz.Scanning means does not change the shape and the angle of divergence of described wire white light in the scanning process.It will be understood by those skilled in the art that, the face B of the right-angle prism 301 in the present embodiment is in fact to scanning without any contribution, therefore right-angle prism 301 can replace to the polygonal prism of other shapes, for example tetragonal prism, pentagonal prism etc., as long as above-mentioned setting is satisfied at certain angle of these prisms, can finish scan function and get final product.

Scanning means can also be the tetragonal prism 401 of band rotating shaft as shown in Figure 4, tetragonal prism 401 is driven by motor 402 and rotates, the light entrance face of tetragonal prism 401 and light-emitting face all are coated with the anti-reflection film at RGB three look laser place wave bands, the position of not blocking light path on tetragonal prism 401 is provided with rotating shaft, make the incidence angle and the incidence point that incide its surperficial light beam constantly change by rotating tetragonal prism 401, thereby scanning form scanning plane on DMD light valve 108.Operation principle by rotating right-angle prism 301 among operation principle that tetragonal prism 401 is scanned into the wire white light scanning plane and Fig. 3 is similar, herein detailed description no longer.Same, the vibration frequency of tetragonal prism 401 is answered 〉=30Hz, and preferred, described vibration frequency is 30Hz to 50Hz.It will be understood by those skilled in the art that tetragonal prism 401 herein also can be replaced by the polygonal prism of other shapes such as pentagonal prism, hexagonal prism, as long as these polygonal prisms have two parallel relative faces and tetragonal prism 401 same settings.The material refractive index and the thickness on the optical direction that it will be understood by those skilled in the art that tetragonal prism 401 can influence the light beam degree of deviation therein, and this deviation degree has also determined angular range and velocity of rotation that tetragonal prism 401 rotates.In general, be provided with under the identical situation at other, obtain the scanning plane of same area, the thickness on the big more and optical direction of the material refractive index of tetragonal prism 401 is big more, and the scope of its scanning is just more little, and is also low more to the rate request of its rotation.

In addition, scanning means can also be the polygon tilting mirror 501 of band rotating shaft as shown in Figure 5, and it is driven by motor 502 and rotates, and utilizes polygon tilting mirror 501 also the wire white light can be scanned into scanning plane, this is a technique known in scanning demonstration field, omits the description to its operation principle herein.Different with the multiple surface rotating mirror that spot light is scanned into scanning plane, each reflecting surface of polygon tilting mirror 501 all with its shaft parallel, difficulty of processing is more much lower than multiple surface rotating mirror.Any in a word realization all can be adopted the wire white light along the device that the direction vertical with its lines scans.

Embodiment 2:

Fig. 6 is for being used for area source of the present utility model in a kind of schematic diagram of embodiment of tricolor laser optical projection system of the DMD of employing light valve.Fig. 6 bag adopts the utility model device among the 3 cover embodiment 1 respectively RGB (RGB) tricolor laser to be handled, with ruddiness is example, ruddiness forms ruddiness scanning plane illumination ruddiness DMD light valve 601 after the utility model device is handled, the forming process of green glow scanning plane and blue light scanning plane is similar with the ruddiness scanning plane, the ruddiness scanning plane forms the ruddiness image after 601 modulation of ruddiness DMD light valve, green glow scanning plane and blue light scanning plane form green glow image and blue light image respectively after green glow DMD light valve and the modulation of blue light DMD light valve.Ruddiness image, green glow image and blue light image are joined at X-cube prism 602 and are formed coloured image, and last coloured image is projected to screen 110 via projection objective 109.Though present embodiment has adopted 3 cover the utility model devices, on being provided with, show complicated slightly, because the RGB three primary light source does not need and DMD light valve coupling ground time-sharing multiplex separately, so lower to the requirement of circuit.

Embodiment 3:

DMD light valve among the embodiment 2 can be replaced by LCD light valve or LCOS light valve, and is corresponding, the polarizing component Line of light that degree of polarization is lower should be set before LCD light valve or LCOS light valve be transformed into the linear polarization Line of light.

Fig. 7 is for being used for area source of the present utility model in a kind of schematic diagram of embodiment of tricolor laser optical projection system of the LCD of employing light valve.Fig. 7 adopts the utility model device among the 3 cover embodiment 1 respectively RGB (RGB) three primary colours to be handled, with ruddiness is example, ruddiness forms the ruddiness scanning plane illumination ruddiness polarizer 701 of non-linear polarization behind the utility model device, the ruddiness scanning plane of described non-linear polarization becomes linear polarization behind ruddiness polarizer 701 ruddiness scanning plane throws light on to ruddiness LCD light valve 702, the forming process of the green glow scanning plane of linear polarization and the blue light scanning plane of linear polarization is similar with the ruddiness scanning plane of linear polarization, the ruddiness scanning plane of described linear polarization forms red image after 702 modulation of ruddiness LCD light valve, the green glow scanning plane of linear polarization and the blue light scanning plane of linear polarization form green glow image and blue light image through green glow LCD light valve and blue light LCD light valve modulation back respectively.Ruddiness image, green glow image and blue light image are joined in X-cube prism 602 and red image and are formed coloured image, and last coloured image is projected to screen 110 via projection objective 109.Ruddiness polarizer 701 can follow scanning means closely and place, and also can follow apparatus for shaping closely and place.It will be understood by those skilled in the art that; the ruddiness polarizer 701 that adopts in the present embodiment is a kind of of polarizing component; non-polarisation can be changed into the element of polarised light and method has a variety ofly, do not enumerate one by one here, but it all should be included in the claimed scope of the utility model.

With area source of the present utility model be used for adopting the laser projection system setting of LCOS light valve and embodiment 3 the utility model is used to adopt the LCD light valve laser projection system be provided with similar, repeated description no longer.It will be understood by those skilled in the art that, used fiber lengths more in short-term in the foregoing description, optical fiber is very little to the depolarization effect of laser, the area source that can be directly the utility model device be produced be used to throw light on LCD light valve and LCOS light valve, and need not to rise partially through for example polarizing component of polarizer one class.

Optionally, the light valve in the foregoing description can not replace the light receiving element that light is modulated with other yet, and the polarizer among the embodiment 3 for example, perhaps described light receiving element are directly for needing illuminated device.The coherence of the scanning plane in the utility model is very low, illumination is very even, can also use it for the illumination of occasions such as stage laser performance.

Though in the above-described embodiments, the scanning direction of described linear laser is preferably perpendicular to the bearing of trend of Line of light fibre array, but when being shaped as non-rectangle for some specific application examples such as light valve, described scanning direction also can be selected to become any specific angle with the line orientations of described Line of light fibre array as the case may be.

The process that in the foregoing description the wire white light is scanned into scanning plane is continuous sweep, it between the up-downgoing progressive formation, compare with simple scan being become the technology of scanning plane, do not have the design that needs up-downgoing overlapping, therefore less demanding to the running precision of scanning means; Above-mentioned scanning means is optical element commonly used in the optical field, and the processing aspect does not have special requirement yet, so cost is very low.Though in the foregoing description, used optical fiber is corresponding one by one with laser instrument, but in the practical application, the laser coupled of a plurality of laser instruments can also be entered an optical fiber, and the laser instrument in the utility model is not limited to semiconductor laser, can also be the laser instrument of other types such as solid state laser, gas laser.In addition, the utility model also can be used for forming monochromatic scanning plane or many primary colours (for example four primary colours) the white light scanning plane except that three primary colours.In addition, related " wire " is not " line " on the absolute sense in the utility model, and is meant " line " of the broad sense with certain width.

It should be noted last that above embodiment is only unrestricted in order to the explanation the technical solution of the utility model.Although the utility model is had been described in detail with reference to embodiment, those of ordinary skill in the art is to be understood that, the technical solution of the utility model is made amendment or is equal to replacement, the spirit and scope that do not break away from technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.

Claims (11)

1. an area source is characterized in that, comprises

A plurality of laser instruments are used to produce multiple laser;

Multifiber, every described optical fiber comprises receiving terminal and exit end, the described receiving terminal of described multifiber is used to receive the laser that described a plurality of laser instrument sends, and described multifiber is arranged in the wire fiber array at described exit end place, described Line of light fibre array output linear laser;

Scanning means is used to scan the described linear laser of described Line of light fibre array outgoing; And

Light receiving element is used to receive the scanning plane that described linear laser forms after described scanning means scanning.

2. area source as claimed in claim 1 wherein, also comprises apparatus for shaping, is arranged between described Line of light fibre array and the described scanning means, is used for described linear laser shaping to the predetermined angle of divergence and predetermined length-width ratio.

3. area source as claimed in claim 1 or 2, wherein, described a plurality of laser instruments are many primary colours laser instrument or mono-colour laser.

4. area source as claimed in claim 3, wherein, the quantity of each primary colours laser instrument of described many primary colours laser instrument is by the separate unit laser power decision of vision white balance power ratio principle and each primary colours.

5. area source as claimed in claim 4, wherein, the arranging situation of the exit end of the described optical fiber in the described Line of light fibre array satisfies uniform color mixture principle and vision white balance power ratio principle.

6. area source as claimed in claim 1 or 2, wherein, described light receiving element is DMD light valve or polarizing component.

7. area source as claimed in claim 6, wherein, the linearly polarized light that produces by described polarizing component be used to throw light on LCD light valve or LCOS light valve.

8. area source as claimed in claim 1 or 2, wherein, the scanning direction of described linear laser is perpendicular to the line orientations of described Line of light fibre array.

9. area source as claimed in claim 1 or 2, wherein, described scanning means is vibratile right-angle prism or vibratile polygonal prism.

10. area source as claimed in claim 9, wherein, described light entrance face and the light-emitting face that vibrates right-angle prism or vibratile polygonal prism is in a certain angle.

11. area source as claimed in claim 1 or 2, wherein, described scanning means is the band rotating shaft

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