CN102147563A - Laser projection light source module and beam shaping method thereof as well as laser display equipment - Google Patents
Laser projection light source module and beam shaping method thereof as well as laser display equipment Download PDFInfo
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- CN102147563A CN102147563A CN2011100788694A CN201110078869A CN102147563A CN 102147563 A CN102147563 A CN 102147563A CN 2011100788694 A CN2011100788694 A CN 2011100788694A CN 201110078869 A CN201110078869 A CN 201110078869A CN 102147563 A CN102147563 A CN 102147563A
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Abstract
The invention discloses a laser projection light source module and a beam shaping method as well as laser display equipment. The laser projection light source module comprises a first laser module for emitting a first beam, a second laser module for emitting a second beam, a third laser module for emitting a third beam, and an optical coupler for receiving the first beam, the second beam and the third beam, and coupling the first, second and third beams into a first coupling beam, wherein the first laser module, the second laser module and the third laser module are the laser modules with different colours. By the invention, the speckle dissipating effect of the laser projection light source module can be improved.
Description
Technical field
The present invention relates to optical field, in particular to a kind of laser projection light source module and beam shaping method thereof, laser display apparatus.
Background technology
Laser display technology has characteristics such as rich color, energy-conserving and environment-protective, is considered to main flow display technique of future generation.Compare with led light source, the optical extend of LASER Light Source is little many, helps the design of projection ray machine efficiently.But, because the LASER Light Source coherence can bring the speckle of projected image, for reducing the speckle noise of image, dissipation spot module can place between light source and the ray machine, dissipation spot module can increase the optical extend of laser beam, so that the light beam of light source can not receive for ray machine effectively.Because the restriction of optical extend, the scattering angle of dissipation spot module can not be too big, and dissipation spot effect is not ideal enough.
Summary of the invention
For this reason, fundamental purpose of the present invention is to provide a kind of laser projection light source module and beam shaping method thereof, laser display apparatus, to address the above problem.
To achieve these goals, according to an aspect of the present invention, provide a kind of laser projection light source module.This laser projection light source module comprises: first laser module is used to send first light beam; Second laser module is used to send second light beam; The 3rd laser module is used to send the 3rd light beam; And photo-coupler, be used to receive described first light beam, described second light beam and described the 3rd light beam and be first coupled light beam described first light beam, described second light beam and described the 3rd light beam coupling, wherein, described first laser module, described second laser module and described the 3rd laser module laser module that is different colours.
To achieve these goals, according to a further aspect in the invention, provide a kind of beam shaping method of laser projection light source module.This beam shaping method comprises: receive first light beam from first laser module; Reception is from second light beam of second laser module; Reception is from the 3rd light beam of the 3rd laser module; And be first coupled light beam with described first light beam, described second light beam and described the 3rd light beam coupling, wherein, the laser module that described first laser module, described second laser module and described the 3rd laser module are different colours.
To achieve these goals, according to another aspect of the invention, provide a kind of laser display apparatus.This laser display apparatus comprises any one laser projection light source module provided by the invention.
By the present invention, adopt the laser projection light source module that comprises with the lower part: first laser module is used to send first light beam; Second laser module is used to send second light beam; The 3rd laser module is used to send the 3rd light beam; And photo-coupler, be used to receive described first light beam, described second light beam and described the 3rd light beam and with described first light beam, described second light beam and described the 3rd light beam coupling are first coupled light beam, wherein, described first laser module, the laser module that described second laser module and described the 3rd laser module are different colours, since with three light beam coupling for a light beam, thereby compressed optical extend, solve the dissatisfactory problem of laser projection light source module dissipation spot effect of the prior art, and then reached the purpose that improves dissipation spot effect.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the synoptic diagram according to the optical projection system of the embodiment of the invention;
Fig. 2 is the synoptic diagram according to light beam coupling in the laser projection light source module of the embodiment of the invention;
Fig. 3 is the synoptic diagram according to beam shaping in the laser projection light source module of the embodiment of the invention;
Fig. 4 is the synoptic diagram that light beam according to an embodiment of the present is coupled in fiber coupler;
Fig. 5 is the synoptic diagram that the light beam according to another kind of embodiment of the present invention is coupled in fiber coupler; And
Fig. 6 is the synoptic diagram that according to another embodiment of the present invention heterogeneous light expansion amount is compressed.
Embodiment
Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
Fig. 1 is the synoptic diagram according to the optical projection system of the embodiment of the invention.
As shown in Figure 1, this optical projection system comprises laser optical source module (frame of broken lines is interior among Fig. 1) and projection module.
The laser optical source module comprises three parts: monochromatic red, green, blue laser module, that is, and ruddiness module 10, green module 20 and blue module 30, polychromatic light optical extend compression module 200, laser eliminating coherence module 300.Can also comprise that in the laser optical source module shaping spares optical module.
RGB one-wavelength laser module can perhaps also can be the laser instrument permutation by single laser instrument or a plurality of laser constitution, and further, the laser instrument permutation can be laser instrument linear array or laser instrument face battle array.Laser instrument can be semiconductor laser and solid frequency double laser.The optical extend of light source is that optics sends the area of light beam and the product of the angle of divergence.For the one-wavelength laser module of a plurality of laser constitutions, can adopt methods such as the shaping of prism group, grin lens shaping, double mirror shaping to compress its optical extend.
On the basis of above-mentioned monochromatic optical extend compress technique, polychromatic light optical extend compression scheme provided by the invention, can be simultaneously module integrated with the dissipation spot be the light source module.When the output interface of RGB laser module was optical fiber, preferably, heterogeneous light optical extend compression can be realized by fiber coupler.
Fig. 2 is the synoptic diagram according to light beam coupling in the laser projection light source module of the embodiment of the invention.
As shown in Figure 2, ruddiness A enters green glow optical fiber by coupling mechanism and green glow B closes bundle, blue light C also enters green glow optical fiber by coupling mechanism and green glow B closes bundle, at this moment the area of output beam is still the area of green glow optical fiber, this with correlation technique in three beams optical fiber be stranded the scheme tie up compare, output optical fibre is one, is not three of binding scheme, the area of output beam is 1/3rd of the original RGB light beam E total area, and optical extend has obtained compression.
Owing to three light beam coupling for a light beam, have been compressed optical extend, can make the light beam of light source be the ray machine reception effectively, and then can reach the purpose that improves dissipation spot effect.
Below the laser projection light source module that the embodiment of the invention provided is described in detail.
This laser projection light source module comprises:
First laser module is used to send first light beam;
Second laser module is used to send second light beam;
The 3rd laser module is used to send the 3rd light beam; And
Photo-coupler, be used to receive first light beam, second light beam and the 3rd light beam and be first coupled light beam first light beam, second light beam and the 3rd light beam coupling, wherein, first laser module, second laser module and the 3rd laser module are the laser module of different colours.
In this laser projection light source module, since by photo-coupler with first light beam, second light beam and three light beam coupling of the 3rd light beam for light beam of first coupled light beam, thereby compressed optical extend, and then can reach the purpose that improves dissipation spot effect.
The first above-mentioned laser module, second laser module and the 3rd laser module can be to be selected from the red laser module respectively, one of in blue laser module and the green laser module (at this moment, in first light beam, second light beam and the 3rd light beam one to be ruddiness, one be blue light for green glow, one), also can be one of three kinds of colors that are selected from respectively other, for example, reddish yellow is green.
Above-mentioned laser projection light source module is except comprising the laser module of three kinds of colors, promptly, outside first laser module, second laser module and the 3rd laser module, can also comprise the laser module of four kinds of colors or five kinds of colors, for example comprise the laser module of four kinds of colors of red, yellow, green and blue.
Preferably, photo-coupler comprises first photo-coupler and second photo-coupler.
First photo-coupler is used to receive first light beam and second light beam and is second coupled light beam with first light beam and second light beam coupling;
Second photo-coupler is used to receive second coupled light beam and the 3rd light beam and is the 3rd coupled light beam with second coupled light beam and the 3rd light beam coupling.
By adopting first photo-coupler and two photo-couplers of second photo-coupler to realize coupling in twos respectively to three light beams, the better effects if that can make coupling.
Need to prove, also can adopt photo-coupler to realize the coupling of three light beams, at this moment, maximum simplified structure.
Preferably, one of in first laser module, second laser module and the 3rd laser module or a plurality of arbitrarily when being laser array, the laser projection light source module also comprises ladder lens.
Ladder lens comprises a plurality of reflecting parts, these a plurality of reflecting parts are used for reflecting the light from each laser instrument of laser array respectively, wherein, the projected length of each reflecting part light-emitting area of each laser instrument in laser array in a plurality of reflecting parts equals the length of the light-emitting area corresponding with it and each reflecting part single tube pairing with it luminous zone angle at 45 in a plurality of reflecting part respectively.
Fig. 3 is the synoptic diagram according to beam shaping in the laser projection light source module of the embodiment of the invention.
As shown in Figure 3, originally the beam diameter that sends of the array LD of five laser constitutions is D, and outgoing beam is d after ladder lens 50 shapings, and beam diameter reduces greatly, and optical extend also reduces thereupon.
Need to prove,, also can at first carry out fast axis collimation and slow axis collimation by fast and slow axis collimating mirror 40 to light from five laser instruments before ladder lens 50 shapings.
By adopting above-mentioned ladder lens that the light from first laser module, second laser module or the 3rd laser module is carried out shaping, can eliminate the gap between the light beam that each laser instrument sends, thereby compress the expansion amount further.
Preferably, the output interface of first laser module, second laser module and the 3rd laser module is the optical fiber output interface, and photo-coupler is a fiber coupler.By adopting light transmission that optical fiber sends first laser module, second laser module and the 3rd laser module to fiber coupler, it is simpler to make that optically-coupled realizes.
Preferably, the laser projection light source module can also comprise a plurality of optical fiber.Wherein:
First optical fiber is connected between first laser module and the fiber coupler, is used to transmit first light beam;
Second optical fiber is connected between second laser module and the fiber coupler, is used to transmit second light beam;
The 3rd optical fiber is connected between the 3rd laser module and the fiber coupler, is used to transmit the 3rd light beam; And
The 4th optical fiber is connected in fiber coupler, is used to transmit first coupled light beam.
By adopting three optical fiber to transmit light beam before the coupling respectively, and utilize the light beam after the coupling of Optical Fiber Transmission, can make that to realize beam cross section after the coupling easily long-pending significantly less than the sectional area sum of the three-beam before the coupling.
Preferably, the area of section of first coupled light beam be first light beam, second light beam, the 3rd light beam area of section mean value or equal in first light beam, second light beam, the 3rd light beam maximum area of section, at this moment, further preferably, the area of section of first light beam, second light beam, the 3rd light beam and first coupled light beam equates.Equal by each light beam before the feasible coupling with the beam cross section area after the coupling, can make that the area of output beam is 1/3rd of the original RGB light beam total area, optical extend has obtained effective compression.
Preferably, the laser projection light source module can also comprise: the eliminating coherence module, be connected in photo-coupler, and be used to receive first coupled light beam.
Fig. 4 is the synoptic diagram that light beam according to an embodiment of the present is coupled in fiber coupler; Fig. 5 is the synoptic diagram that the light beam according to another kind of embodiment of the present invention is coupled in fiber coupler.
Light is transferred to another root optical fiber from an optical fiber in fiber coupler be to realize by the coupling between the optical mode, as Fig. 4, when the fibre core of two optical fiber leans on enough closely, optical field patterns various in two optical fiber can be overlapping, at this moment the light field in optical fiber can excite the light field of another root optical fiber, and the result is light coupling repeatedly in two optical fiber.As the light of two different wave lengths respectively during two optical fiber of incident, the length by suitable design coupling mechanism can make the light of two different wave lengths all to an optical fiber.The close mode of the fibre core of optical fiber is parallel mode (Fig. 4), also the mode (Fig. 5) of wedge shape.
The present invention proposes to reduce the scheme of LASER Light Source optical extend, for inserting of dissipation spot module provides the design space, can add the effect of Qianxiaoshan spot.
Documents discloses variation that the polychrome free space closes the bundle scheme.The polychrome free space closes bundle and uses very generally, and our scheme has added monochromatic combiner press polish propagation module and dissipation spot module, more pays attention to the framework of laser light source module integral body.
Heterogeneous light optical extend compression can be realized by the Free Space Optics device.
Fig. 6 is the synoptic diagram that according to another embodiment of the present invention heterogeneous light expansion amount is compressed.
As shown in Figure 6, green counter to be popular in 80 couples of ruddiness A of eyeglass are full impregnateds, and green glow B is all-trans, and same, blue anti-90 couples of ruddiness A of red green lens and green glow B are full impregnateds, and blue light C is all-trans.Output is the light that RGB closes bundle at last, and the area of output beam also is 1/3rd of the original RGB light beam total area.
Above scheme is to be example with the RGB light source, equally also is suitable for the situation with four looks (as red, yellow, green and blue) and multicolored light source.
From the light beam that polychromatic light optical extend compression module 200 comes out, further enter dissipation spot module 300, from the light beam that dissipation spot module 300 is come out, enter the even polishing shape illuminator and the projection module 500 of projection ray machine at last.The optical extend of projection ray machine generally be by little throwing device (DLP, LCOS) and projection lens decision.If the optical extend of light source surpasses the optical extend of ray machine, the light beam of light source just can not collected effectively.If not by the color optical propagation compression module 200 among the figure, its optical extend may be greater than the optical extend of ray machine behind the dissipation spot from light beam that monochromatic RGB laser module comes out, particularly, the strong more module of dissipation spot effect is big more to the increase of optical extend.Such as, by the fibre bundle that the RGB output optical fibre ties up, its diameter is 2.5mm, the angle of divergence is 12 degree.Supposing to have an aperture is 5mm dissipation spot random phase sheet, and original light beam is through expanding Shu Houwei 5.0mm diameter, and the light beam of the 6 degree angles of divergence is 20 degree as the scattering angle of dissipation spot random phase sheet self, and then the optical extend of light beam is 12mm
2Sr.To adopting the ray machine of 0.6 o'clock DLP and F#/3.0, its optical extend is 8.5mm
2Sr, the light of light source can not receive for ray machine effectively.As adopt the color optical diffusing capacity to compress, this exports RGB light simultaneously by an optical fiber, the optical extend of light source is original 1/3, if again in conjunction with Fig. 3 or other monochromatic light optics propagation compress technique, with the optical extend boil down to of light source original 1/9, say that equivalently the light beam that incides 5mm dissipation spot random phase sheet can be compressed to the 2 degree angles of divergence by the original 6 degree angles of divergence, at this moment the optical extend from the light beam of dissipation spot module outgoing is 8.5mm
2Sr matches with ray machine, and the light of light source is effectively received.
The embodiment of the invention also provides the shaping methods of laser beam in a kind of laser projection light source module, and the shaping methods of laser beam comprises in this laser projection light source module:
Step S101 receives first light beam from first laser module;
Step S102 receives second light beam from second laser module;
Step S103 receives the 3rd light beam from the 3rd laser module; And
Step S104 is first coupled light beam with described first light beam, described second light beam and described the 3rd light beam coupling,
Wherein, described first laser module, described second laser module and described the 3rd laser module laser module that is different colours.
The first above-mentioned laser module, second laser module and the 3rd laser module can be to be selected from the red laser module respectively, one of in blue laser module and the green laser module (at this moment, in first light beam, second light beam and the 3rd light beam one to be ruddiness, one be blue light for green glow, one), also can be one of three kinds of colors that are selected from respectively other, for example, reddish yellow is green.
Above-mentioned laser projection light source module is except comprising the laser module of three kinds of colors, promptly, outside first laser module, second laser module and the 3rd laser module, can also comprise the laser module of four kinds of colors or five kinds of colors, for example comprise the laser module of four kinds of colors of red, yellow, green and blue.
Preferably, be that first coupled light beam comprises with described first light beam, described second light beam and described the 3rd light beam coupling: with described first light beam and described second light beam coupling is second coupled light beam; And be the 3rd coupled light beam with described second coupled light beam and described the 3rd light beam coupling.
The present invention also provides a kind of laser display apparatus, and this laser display apparatus can comprise the laser projection light source module that the arbitrary embodiment of the present invention is provided.This laser display apparatus can be projector or laser television etc.
As can be seen from the above description, the present invention can improve the effect of dissipation spot.The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. laser projection light source module is characterized in that comprising:
First laser module is used to send first light beam;
Second laser module is used to send second light beam;
The 3rd laser module is used to send the 3rd light beam; And
Photo-coupler is used to receive described first light beam, described second light beam and described the 3rd light beam and is first coupled light beam with described first light beam, described second light beam and described the 3rd light beam coupling,
Wherein, described first laser module, described second laser module and described the 3rd laser module laser module that is different colours.
2. laser projection light source module according to claim 1 is characterized in that, described photo-coupler comprises:
First photo-coupler is used to receive described first light beam and described second light beam and is second coupled light beam with described first light beam and described second light beam coupling; And
Second photo-coupler is used to receive described second coupled light beam and described the 3rd light beam and is the 3rd coupled light beam with described second coupled light beam and described the 3rd light beam coupling.
3. laser projection light source module according to claim 1, it is characterized in that, one of in described first laser module, described second laser module and described the 3rd laser module or a plurality of arbitrarily when being laser array, described laser projection light source module also comprises:
Ladder lens, comprise a plurality of reflecting parts, be respectively applied for the light of reflection from each laser instrument in the described laser array, wherein, the projected length of each reflecting part light-emitting area of each laser instrument in described laser array in described a plurality of reflecting part equals the length of the light-emitting area corresponding with it and each reflecting part single tube pairing with it luminous zone angle at 45 in described a plurality of reflecting part respectively.
4. laser projection light source module according to claim 1 is characterized in that, the output interface of described first laser module, described second laser module and described the 3rd laser module is the optical fiber output interface, and described photo-coupler is a fiber coupler.
5. laser projection light source module according to claim 4 is characterized in that also comprising:
First optical fiber is connected between described first laser module and the described fiber coupler, is used to transmit described first light beam;
Second optical fiber is connected between described second laser module and the described fiber coupler, is used to transmit described second light beam;
The 3rd optical fiber is connected between described the 3rd laser module and the described fiber coupler, is used to transmit described the 3rd light beam; And
The 4th optical fiber is connected in described fiber coupler, is used to transmit described first coupled light beam.
6. laser projection light source module according to claim 1, it is characterized in that, the area of section of described first coupled light beam be described first light beam, described second light beam, described the 3rd light beam area of section mean value or equal in described first light beam, described second light beam, described the 3rd light beam maximum area of section.
7. laser projection light source module according to claim 1 is characterized in that also comprising: the eliminating coherence module, be connected in described photo-coupler, and be used to receive described first coupled light beam.
8. the beam shaping method of a laser projection light source module is characterized in that comprising:
Reception is from first light beam of first laser module;
Reception is from second light beam of second laser module;
Reception is from the 3rd light beam of the 3rd laser module; And
With described first light beam, described second light beam and described the 3rd light beam coupling is first coupled light beam,
Wherein, described first laser module, described second laser module and described the 3rd laser module laser module that is different colours.
9. method according to claim 8 is characterized in that, is that first coupled light beam comprises with described first light beam, described second light beam and described the 3rd light beam coupling:
With described first light beam and described second light beam coupling is second coupled light beam; And
With described second coupled light beam and described the 3rd light beam coupling is the 3rd coupled light beam.
10. a laser display apparatus is characterized in that comprising each described laser projection light source module in the claim 1 to 7.
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| CN104252047A (en) * | 2013-06-26 | 2014-12-31 | Cq科技有限公司 | Laser projection system with speckle elimination function |
| WO2020181769A1 (en) * | 2019-03-08 | 2020-09-17 | 深圳市星汉激光科技有限公司 | Laser compound light source |
| CN113260890A (en) * | 2018-12-13 | 2021-08-13 | 索尼集团公司 | Optical connector, optical cable and electronic device |
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Application publication date: 20110810 |