CN204575981U - Laser Multiplexing apparatus and projector equipment - Google Patents
Laser Multiplexing apparatus and projector equipment Download PDFInfo
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- CN204575981U CN204575981U CN201520162028.5U CN201520162028U CN204575981U CN 204575981 U CN204575981 U CN 204575981U CN 201520162028 U CN201520162028 U CN 201520162028U CN 204575981 U CN204575981 U CN 204575981U
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Abstract
The utility model discloses a kind of laser Multiplexing apparatus and projector equipment, comprise beam condensing unit, first light source, reflection unit and light collecting device, this beam condensing unit comprises the reflecting curved surface had with central shaft, first light source comprises at least two groups and is plane arrangement and the array of source being positioned at the surrounding of central shaft, this array of source is along the directional spreding of central shaft, and emergent light direction and central axis, reflection unit is positioned on the emitting light path of the first light source, re-shoot in reflecting curved surface for the emergent light of the first light source is guided to the direction parallel with central shaft, the converging light of light collecting device self-reflection curved surface in future guides along the direction outgoing away from reflecting curved surface.Based on technique scheme, the convergent beam after parallel beam and compression shaping exists overlapping, and to make the space on light-combining area length and width two direction be reused, topology layout is compact, achieves high brightness laser and export while reducing Multiplexing apparatus volume.
Description
Technical Field
The utility model relates to a projection display technology field especially relates to a laser closes light device and projection equipment.
Background
Currently, more and more projection display products achieve high brightness output by adopting a light source scheme of laser-excited fluorescent powder. As is well known to those skilled in the art, the brightness of the output beam is directly related to the laser power, and in the case of high brightness requirement, it is usually implemented by using a low-power laser array, which needs to combine the beams emitted from the respective lasers. However, the conventional laser light combining structure has a large volume, which is not favorable for subsequent light path processing and layout of the internal structure of the whole machine.
SUMMERY OF THE UTILITY MODEL
A primary object of the present invention is to provide a laser beam combining device, which solves the problem of the prior laser beam combining structure.
In order to achieve the above object, the present invention provides a laser beam combining device, a light condensing device, wherein the light condensing device comprises a reflecting curved surface having a central axis; the first light source comprises at least two groups of light source arrays which are arranged in a plane shape, the light source arrays are positioned around the central shaft and distributed along the direction of the central shaft, and the emergent light direction of the first light source is vertical to the central shaft; the reflecting device comprises reflecting unit arrays which are in one-to-one correspondence with the light source arrays of each group, is positioned on an emergent light path of the first light source and is used for guiding emergent light of the first light source to a direction parallel to the central axis and then incident on the reflecting curved surface; the light collection device is positioned on the central shaft and at least partially positioned between the two groups of light source arrays, the reflecting curved surface converges the light from the reflecting device to the incident surface of the light collection device, and the light is guided by the light collection device to be emitted in the direction far away from the reflecting curved surface.
Preferably, the laser light combining device further comprises a light scattering element arranged at a beam entrance of the light collecting device.
Preferably, the laser light sources of each group of light source arrays in the first light source are staggered from each other in a direction perpendicular to the outgoing light axis thereof and perpendicular to the central axis.
Preferably, the light source arrays are symmetrically arranged on two sides of the central shaft, and the reflecting devices are symmetrically arranged on two sides of the central shaft.
Preferably, the reflection unit array is composed of reflection strips, the reflection strips are perpendicular to the emergent light axis of the first light source and perpendicular to the direction of the central axis, the reflection strips corresponding to a group of the reflection unit array of the light source array are arranged along the emergent light direction of the light source array in a staggered manner, and the light beam distance is reduced after the light emitted by the light source array is reflected by the reflection unit array.
Preferably, the reflective strip includes reflective regions and transmissive regions alternately arranged in a direction of a maximum length thereof.
Preferably, the laser light combining device further comprises a second light source, the second light source is located on one side of the light condensing device away from the first light source, and the second light source emits light with a wavelength band different from that of the first light source;
the light condensing device comprises a lens body and a dielectric film plated on the reflecting curved surface, the lens body is used for condensing the light from the second light source to the incident surface of the light collecting device, and the dielectric film reflects the light beam from the reflecting device and transmits the light beam emitted by the second light source.
Preferably, the laser light combining device further comprises a second light source and a light condensing element; the second light source is positioned on one side of the light condensing device far away from the first light source, and the second light source emits light with a wave band different from that of the first light source; the light condensing device comprises a lens body and a dielectric film plated on the reflecting curved surface, and the dielectric film reflects the light beam from the reflecting device and transmits the light beam emitted by the second light source; the light condensing element is positioned between the second light source and the light condensing device, a main optical axis of the light condensing element is coincided with the central axis, and the light condensing element condenses light from the second light source to an incident surface of the light collecting device.
Preferably, the laser light combining device further comprises a second light source, a light condensing element and a dichroic reflecting element; the second light source and the first light source are positioned on the same side of the light condensing device, and the second light source emits light with a different waveband from the first light source; the dichroic reflecting element is positioned between the light condensing device and the light collecting device and is used for transmitting the light beam emitted by the first light source and reflecting the light beam emitted by the second light source; the light-condensing element is located between the second light source and the dichroic reflection element, and the light-condensing element condenses light from the second light source to an incident surface of the light collection device through the dichroic reflection element.
Preferably, the incident angle of the light beam emitted by the second light source on the incident surface of the light collection device is smaller than the incident angle of the light beam emitted by the first light source on the incident surface of the light collection device.
In addition, in order to achieve the above object, the present invention further provides a projection apparatus, including the laser beam combining device in any one of the above technical solutions.
The utility model provides a laser closes light device and projection equipment, produce the parallel light beam of intensive range through first light source earlier, recycle spotlight device and reflect meter and compress the plastic to this parallel light beam, the even facula of guide output through light collection device at last, the light beam closes the light beam transmission path who restraints the in-process and all is located the region that first light source encloses and closes, there is the overlap parallel light beam and the convergent light beam after spotlight device converges, so that close the space in the regional length width both sides of light and obtain reuse, the whole structural configuration who closes the light device is compacter, can hold more laser light source, from this reduce and close the light device volume when having realized high brightness laser output.
Drawings
Fig. 1 is a top view of a first embodiment of a laser beam combining device according to the present invention;
FIG. 2 is a simplified structural diagram of a partial structure of the laser beam combiner shown in FIG. 1 at a side view;
fig. 3 is a top view of a second embodiment of the laser beam combining device of the present invention;
fig. 4 is a top view of a third embodiment of the laser beam combining device of the present invention;
fig. 5 is a top view of a fourth embodiment of the laser beam combining device of the present invention;
fig. 6 is a top view of a fifth embodiment of the laser beam combining device of the present invention;
fig. 7 is a plan view of a sixth embodiment of the laser beam combining device of the present invention;
fig. 8 is a side view of the laser beam combining device shown in fig. 7.
Detailed Description
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The utility model provides a laser closes light device, see fig. 1, in the first embodiment, this laser closes light device includes beam condensing unit 100, first light source 200, reflect meter and light collection device 500, wherein beam condensing unit 100 includes reflection curved surface 110, this reflection curved surface 110 has the center pin, reflection curved surface 110 can be the arbitrary suitable curved surface such as sphere, parabolic cylinder, the light of giving out to first light source 200 has high reflectivity, for example is the mirror surface; the first light source 200 includes at least two sets of light source arrays arranged in a plane, the light source arrays are located around the central axis and distributed along the direction of the central axis, the light source arrays are composed of a plurality of laser light sources arranged according to a certain rule, the laser light sources are preferably blue light solid state light sources, such as laser diodes, blue lasers and any suitable lasers, wherein the laser diodes are shown in the figure, and the emergent light direction of the first light source 200 is perpendicular to the central axis; the reflection device comprises reflection unit arrays corresponding to the light source arrays of each group one by one, which are positioned on the emergent light path of the first light source 200 and used for guiding the emergent light of the first light source 200 to the direction parallel to the central axis and then incident on the reflection curved surface 110; the light collection means 500 is located on the central axis, and at least partially between the two sets of arrays of light sources, the two groups of light source arrays refer to light source arrays in a direction perpendicular to the central axis, so that the light collecting device 500 is arranged in a space enclosed by the light source arrays, the space utilization rate of the laser light combining device in the direction perpendicular to the central axis is improved, the reflecting curved surface 110 converges light from the reflecting device to an incident surface of the light collecting device 500, and the concentrated light is directed by the light collection device 500 to exit in a direction away from the curved reflective surface 110, i.e., the light collection device 500 is a light-homogenizing rod, which has high transmittance to the light beam emitted from the first light source 200, and the diffusion angle of the light beam can be reduced by the diffusion of the light beam by the light-homogenizing rod, a uniform light spot is obtained at the beam exit of the dodging plate, but the light collecting means 500 may be any other suitable optical device.
Specifically, in order to combine a plurality of light beams to realize high-brightness laser output, the optical element adopts the following combination structure: as shown in fig. 1, the first light sources 200 are a plurality of groups, and are symmetrically disposed on two sides of the central axis of the curved reflective surface 110, and the reflective devices corresponding to the groups of first light sources 200 located on the same side are staggered from each other in the light emitting direction of the first light sources 200, more specifically, two groups of first light sources 200 separated by a given distance along the central axis of the curved reflective surface 110 are disposed on each side, and the light emitting direction of the first light sources 200 is perpendicular to the central axis of the curved reflective surface 110, so that the space occupied by the first light sources 200 in the width direction of the light combining area can be reduced. However, it should be understood that the number of the first light sources 200 and the position relationship thereof with respect to the curved reflective surface 110 in the present embodiment are merely examples, and can be flexibly adjusted in practical applications.
The number of the reflection devices is equal to that of the first light sources 200, and each reflection device is located on the corresponding exit light path of the first light source 200 to reflect the light beams emitted by the first light source 200 to the reflection curved surface 110 along the direction parallel to the central axis of the reflection curved surface 110, thereby ensuring that the light beams emitted by the first light sources 200 are converged together and realizing high-brightness laser output.
The laser beam combining device of this embodiment first generates densely arranged parallel light beams by the first light source 200, then adjusts the transmission direction of the parallel light beams by the reflection device, so that the parallel light beams irradiate the reflection curved surface 110 along the direction parallel to the central axis of the reflection curved surface 110, and then adjusts the transmission direction of the parallel light beams by the reflection curved surface 110 and compresses and shapes the parallel light beams, and each light beam converges at the focal point of the reflection curved surface 110, and is finally received by the light collecting device 500, for example, when the light collecting device 500 is a dodging rod, a high-brightness uniform laser beam can be obtained. Therefore, light beam transmission paths in the light beam combining process are all located in an area enclosed by the first light source 200, and parallel light beams and converging light beams converged by the light converging device 100 are overlapped, so that the space in the length direction and the width direction of a light combining area is recycled, the structural layout of the whole device is more compact, more laser light sources can be accommodated, and high-brightness laser output is realized while the size of the device is reduced.
Further, the laser beam combining apparatus further includes a light diffusion element (not shown) disposed at the beam entrance of the light collection apparatus 500, which may be a diffusion sheet with high transmittance, and the light diffusion element diffuses the light beam converged at the focal point of the curved reflective surface 110, so that the light beam is first adjusted to a uniform surface light source before entering the light collection apparatus 500, and then the light collection apparatus 500 adjusts the light beam to output a combined light beam with a small diffusion amount.
With reference to fig. 1 and 2, the first light source 200 is illustrated as including two sets of light source arrays. Specifically, the laser light sources of each group of the first light source 200 are staggered from each other in a direction perpendicular to the light emitting axis thereof and perpendicular to the central axis of the reflective curved surface 110, and for convenience of description, the two groups of the first light source 200 are respectively the first light source array 210 and the second light source array 220 (defined as a transverse direction being a direction parallel to the central axis of the reflective curved surface 110 and a longitudinal direction being a direction perpendicular to the central axis of the reflective curved surface 110), so that the light beams emitted by each laser light source in the first light source array 210 are staggered from the light beams emitted by each laser light source in the second light source array 220 in a direction perpendicular to the central axis of the reflective curved surface 110. The number of the laser light sources in the first light source array 210 and the second light source array 220 may be the same or different, for example, both the light source arrays are composed of the laser light sources in a 4 × 8 matrix arrangement, that is, there are 32 laser light sources in each light source array. The reflecting device is provided with reflecting regions corresponding to the first light source array 210 and the second light source array 220, the reflecting regions can be formed by reflecting mirrors or coating films with high reflectivity, the position of the reflecting device corresponding to the first light source array 210 is also provided with a transmitting region through which light beams emitted by the second light source array 220 can pass, the transmitting region can be an optical lens with high transmissivity or a through hole, and the light beams emitted by the first light source array 210 and the light beams emitted by the second light source array 220 are coplanar, so that the purpose of reducing the space occupied by the first light source 200 and the reflecting device in the width direction of the light combination region is achieved.
As shown in fig. 1, the first light sources 200 located on the same side of the light condensing device 100 are arranged on the same plane, and in order to prevent the reflection device close to the light condensing device 100 from blocking the light beam reflected by the reflection device far from the light condensing device 100, the reflection devices corresponding to the sets of first light sources 200 located on the same side are mutually staggered in the light emitting direction of the first light sources 200, thereby avoiding the problem of light beam blocking caused when multiple sets of first light sources 200 are distributed on the same side. As an example, along the transmission direction of the convergent light beam, the reflection device gradually approaches the central axis of the curved reflection surface 110 to form a step-shaped distribution structure, thereby achieving the purpose of avoiding the light path. Of course, in other embodiments, along the transmission direction of the convergent light beam, the reflection device gradually keeps away from the central axis of the curved reflection surface 110, and a step-shaped distribution structure is also formed, so as to achieve the purpose of avoiding the light path, and the distribution structure of the reflection device can be arbitrarily selected in specific application, which is not limited by the present invention.
In this embodiment, the reflective unit array is composed of reflective strips, and the reflective strips have a maximum length in a direction perpendicular to the optical axis of the emergent light of the first light source 200 and perpendicular to the central axis of the reflective curved surface 110, for example, the reflective strips are strip-shaped, and may be specifically a rectangular plate-shaped structure, that is, the long sides of the reflective strips are perpendicular to the central axis of the reflective curved surface 110. The reflective strips of the reflective unit arrays corresponding to one group of light source arrays are arranged along the emergent light direction of the light source arrays in a staggered manner, and the light beam space of the light beams emitted by the light source arrays is reduced after the light beams are reflected by the reflective unit arrays, so that the groups of reflective unit arrays in the reflective device are overlapped in the direction parallel to the central axis of the reflective curved surface 110, and the volume of the laser light combining device is reduced.
Specifically, the reflective strip includes reflective regions and transmissive regions alternately arranged in a direction of maximum length thereof, whereby the reflective cell array positioned at the front does not block the reflected light from the rear on the reflected light path. For example, corresponding to the first light source array 210 and the second light source array 220, the reflection device includes a first reflection unit array 300 and a second reflection unit array 400, the first reflection unit array 300 includes first reflection bars 310 corresponding to the longitudinal alignment laser light sources in the first light source array 210, and the second reflection unit array 400 includes second reflection bars 410 corresponding to the longitudinal alignment laser light sources in the second light source array 220, wherein the first reflection bars 310 in the first reflection unit array 300 are distributed at equal intervals and are staggered from each other in a direction perpendicular to the central axis of the curved reflection surface 110, and the second reflection bars 410 in the second reflection unit array 400 are distributed at equal intervals and are staggered from each other in a direction perpendicular to the central axis of the curved reflection surface 110.
Specifically, the first reflection bar 310 includes first reflection regions 311 and transmission regions 312 alternately distributed, the first reflection regions 311 are used for reflecting the light beams emitted by the longitudinal column laser light sources in the corresponding first light source array 210, as shown in fig. 2, the first reflection bar 310 includes eight first reflection regions 311, so that multiple laser beams can be reflected simultaneously, the direction uniformity is high, and the light beam quality is good; the second reflective strips 410 include spaced apart second reflective regions or continuously disposed second reflective regions (not numbered), in order to simplify the structural design, the second reflective region is preferably a continuous integral structure, and the second reflective region is used for reflecting the light beams emitted by the longitudinal nematic laser light sources in the corresponding second light source array 220, and the transmissive regions 312 of the first reflective strips 310 serve to transmit the light beams reflected by the corresponding second reflective strips 410, the first and second reflection unit arrays 300 and 400 do not need to be staggered from each other in a direction perpendicular to the central axis of the curved reflection surface 110, that is, the first reflecting unit array 300 and the second reflecting unit array 400 are overlapped in the direction parallel to the central axis of the curved reflecting surface 110, so that the space occupied by the first light source 200 and the reflecting device in the width direction of the light combining area is greatly reduced, and the structure of the whole light combining device is more compact. In addition, the first and second reflection bars 310 and 410 may have the same configuration.
For example, the first reflective strips 310 are formed by area coating to form the first reflective regions 311 and the transmissive regions 312, and the second reflective strips 410 may be formed by reflectors, which should ensure that the first reflective regions 311 and the second reflective regions have high reflectivity for the light beams emitted by the first light sources 200, and the transmissive regions 312 have high transmissivity for the light beams emitted by the first light sources 200.
Referring to fig. 3, in the second embodiment, the main difference from the first embodiment is that the first light source array 210 and the first light source array 210' close to the light condensing device 100, the second light source array 220 and the second light source array 220 ' are staggered in the direction parallel to the central axis of the reflective curved surface 110, the light beam emitted by the first light source array 210 firstly passes through the light-transmitting gap reserved in the first reflective unit array 300 and then irradiates on the first reflective unit array 300 ', the light beam emitted by the second light source array 220 firstly passes through the light-transmitting gap reserved in the second reflective unit array 400 and then irradiates on the second reflective unit array 400 ', and similarly, the light beam emitted by the first light source array 210 ' firstly passes through the light-transmitting gap reserved in the first reflective unit array 300 ' and then irradiates on the first reflective unit array 300, and the light beam emitted by the second light source array 220 ' firstly passes through the light-transmitting gap reserved in the second reflective unit array 400 ' and then irradiates on the second reflective unit array 400. For the remaining light source arrays far from the light condensing device 100, the light collecting device 500 interferes with the optical path crossing the central axis of the curved reflecting surface 110, so the same symmetrical arrangement as that of the first embodiment is adopted.
Referring to fig. 4, in the third embodiment, the main difference from the first embodiment is the arrangement of the reflective elements in the reflective device, and the first reflective unit array 300 and the second reflective unit array 400 shown in fig. 4 are combined to form a "V" shape, it should be understood that the reflective device is used to change the transmission direction of the light beam emitted by the first light source 200, so that the light beam emitted by the first light source 200 is irradiated on the curved reflective surface 110 in a direction parallel to the central axis of the curved reflective surface 110, and therefore the reflective elements in the reflective device have various arrangements, which are not listed here, for example, the reflective device of the present embodiment turns the light beam emitted by the first light source 200 by 90 °.
Referring to fig. 5, in the fourth embodiment, the difference from the first embodiment is that the laser beam combining device further includes a second light source 600, the first light source 200 and the second light source 600 respectively emit light in different wavelength bands, for example, the first light source 200 emits light in a blue wavelength band, and the second light source 600 emits light in a red wavelength band, and in particular, the light emitting types of the first light source 200 and the second light source 600 can be selected correspondingly. The second light source 600 is located on a side of the light focusing device 100 away from the first light source 200, i.e., the light focusing device 100 separates the first light source 200 from the second light source 600. The light condensing device 100 includes a lens body and a dielectric film coated on the reflective curved surface 110, the lens body has a condensing effect on the light beam emitted from the second light source 600, the dielectric film reflects the light beam from the reflective device, has a high reflectivity on the light beam emitted from the first light source 200, transmits the light beam emitted from the second light source 600, and has a high transmittance on the light beam emitted from the second light source 600, and the lens body condenses the light from the second light source 600 to the incident surface of the light collecting device 500, thereby realizing the synthesis of the light beams. In order to ensure the quality of the light beam, the main optical axis of the lens body coincides with the central axis of the reflective curved surface 110, and the focal point of the lens body also coincides with the focal point of the reflective curved surface 110, and the light beam of the second light source 600 is incident to the lens body in a direction parallel to the main optical axis of the lens body, and is converged by the lens body, overlapped with the converging light of the first light source 200, and received by the light collecting device 500.
Referring to fig. 6, in the fifth embodiment, the difference from the fourth embodiment is that the laser beam combining device further includes a light condensing element 700, the light condensing device 100 includes a lens body and a dielectric film plated on the curved reflective surface 110, the light condensing element 700 is located between the second light source 600 and the light condensing device 100, a main optical axis of the light condensing element 700 coincides with a central axis of the curved reflective surface 110, a light beam emitted from the second light source 600 enters the light collecting device 500 from a light beam inlet of the light collecting device 500 after being condensed by the light condensing element 700, that is, a focal point of the light condensing element 700 coincides with a focal point of the curved reflective surface 110. Compared with the fifth embodiment, the light condensing element 700 is added, and the length of the laser light combining device is increased to a certain extent, but the structural design of the light condensing device 100 can be simplified by adopting the light condensing element 700, and the production cost can be reduced, for example, the light condensing element 700 can adopt an existing convex lens or any other suitable lens.
Referring to fig. 7, in the sixth embodiment, the difference from the fourth and fifth embodiments is that the second light source 600 and the first light source 200 of the present embodiment are located on the same side of the light condensing device 100, and compared with the fourth embodiment, a light condensing element 700 and a dichroic reflective element 800 are added, and the dichroic reflective element 800 is located between the light condensing device 100 and the light collecting device 500. More specifically, the dichroic reflective element 800 is located between the light gathering device 100 and the reflective device adjacent to the light gathering device 100, the light gathering element 700 is located between the second light source 600 and the dichroic reflective element 800, the dichroic reflective element 800 has high transmittance for the light beam emitted from the first light source 200, and has high reflectance for the light beam emitted from the second light source 600, for example, the dichroic reflective element 800 may adopt a filter, and the light beam emitted from the second light source 600 is first converged by the light gathering element 700, then reflected by the dichroic reflective element 800, and enters the light gathering device 500 from the light beam inlet of the light gathering device 500. Compared with the fourth and fifth embodiments, the added optical element in this embodiment does not affect the length of the laser beam combiner, but the width of the laser beam combiner is increased.
It should be understood that the second light source light combining structure added in the fourth, fifth and sixth embodiments can also be implemented based on the second and third embodiments, and has various combinations in specific applications.
It should be noted that in practical applications, the light beams output by the light collection device 500 need to be split and combined, and the splitting and combining are simply performed by the different etendue of the light beams, so that the incident angle of the light beam emitted by the first light source 200 on the incident surface of the light collection device 500 is adjusted by adjusting the distance between the reflection device and the light collection device 500 in the direction parallel to the central axis of the curved reflection surface 110 and the distance between the reflection device and the light collection device 500 in the direction perpendicular to the central axis of the curved reflection surface 110, so that the incident angle of the light beam emitted by the second light source 600 on the incident surface of the light collection device 500 is smaller than the incident angle of the light beam emitted by the first light source 200 on the incident surface of the light collection device 500.
Therefore, the utility model discloses a laser closes light device when adopting two sets of different light sources, can select the arrangement structure that corresponds according to the allowance of length and width size, for example when the allowance of length size is great, can adopt the technical scheme of fourth, five embodiments, and when the allowance of width size is great, then can adopt the technical scheme of sixth embodiment, compare and close the light structure in current laser and have higher expansion ability.
According to the utility model discloses technical scheme, the light beam closes and restraints the light beam transmission path of in-process all to be located first light source and encloses the region of closing, and there is the overlap parallel beam and the convergent light beam after condensing unit converges to make and close the space on the regional length and width two directions of light and obtain reuse, the structural configuration of whole equipment is compacter, can hold more laser light source, has realized hi-lite laser output when reducing the device volume from this.
The utility model provides a projection equipment, in an embodiment, this projection equipment includes that laser closes light device, display element, light source side optical device, projection side optical device and controlling means etc. wherein the laser closes the laser that light device adopted above-mentioned each embodiment and closes the light device, and all the other parts are prior art.
The embodiment of the projection device comprises all technical schemes of all embodiments of the laser light combining device, the achieved technical effects are completely the same, and the details are not repeated herein.
The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (11)
1. A laser beam combining device, comprising:
a light-condensing device comprising a reflective curved surface having a central axis;
the first light source comprises at least two groups of light source arrays which are arranged in a plane shape, the light source arrays are positioned around the central shaft and distributed along the direction of the central shaft, and the emergent light direction of the first light source is vertical to the central shaft;
the reflecting device comprises reflecting unit arrays which are in one-to-one correspondence with the light source arrays of each group, is positioned on an emergent light path of the first light source and is used for guiding emergent light of the first light source to a direction parallel to the central axis and then incident on the reflecting curved surface;
the light collection device is positioned on the central shaft and at least partially positioned between the two groups of light source arrays, the reflecting curved surface converges the light from the reflecting device to the incident surface of the light collection device, and the light is guided by the light collection device to be emitted in the direction far away from the reflecting curved surface.
2. The laser beam combining device of claim 1, further comprising a light dispersing element disposed at a beam entrance of the light collecting device.
3. The laser beam combining device according to claim 1, wherein the laser light sources of the respective groups of light source arrays in the first light source are shifted from each other in a direction perpendicular to the exit light axis thereof and perpendicular to the central axis.
4. The laser beam combiner of claim 1, wherein the light source arrays are symmetrically disposed on both sides of the central axis, and the reflection means are symmetrically disposed on both sides of the central axis.
5. The laser beam combiner according to claim 1, 3 or 4, wherein the reflection unit array is composed of reflection strips, the reflection strips have maximum lengths in a direction perpendicular to the optical axis of the emergent light of the first light source and perpendicular to the central axis, the reflection strips of the reflection unit array corresponding to one group of the light source arrays are arranged in a staggered manner along the direction of the emergent light of the light source array, and the light beam pitch of the light beams emitted by the light source array is reduced after the light beams are reflected by the reflection unit array.
6. The laser combiner of claim 5, wherein the reflective strips comprise reflective regions and transmissive regions that alternate in the direction of their greatest length.
7. The laser beam combiner of claim 1, further comprising a second light source located on a side of the light collector away from the first light source, the second light source emitting light in a wavelength band different from the first light source;
the light condensing device comprises a lens body and a dielectric film plated on the reflecting curved surface, the lens body is used for condensing the light from the second light source to the incident surface of the light collecting device, and the dielectric film reflects the light beam from the reflecting device and transmits the light beam emitted by the second light source.
8. The laser beam combiner of claim 1, further comprising a second light source and a condensing element; wherein,
the second light source is positioned on one side of the light gathering device far away from the first light source and emits light with a wave band different from that of the first light source;
the light condensing device comprises a lens body and a dielectric film plated on the reflecting curved surface, and the dielectric film reflects the light beam from the reflecting device and transmits the light beam emitted by the second light source;
the light condensing element is positioned between the second light source and the light condensing device, a main optical axis of the light condensing element is coincided with the central axis, and the light condensing element condenses light from the second light source to an incident surface of the light collecting device.
9. The laser beam combining device of claim 1, further comprising a second light source, a condensing element, and a dichroic reflecting element; wherein,
the second light source and the first light source are positioned on the same side of the light condensation device, and the second light source emits light with a different waveband from the first light source;
the dichroic reflecting element is positioned between the light condensing device and the light collecting device and is used for transmitting the light beam emitted by the first light source and reflecting the light beam emitted by the second light source;
the light-condensing element is located between the second light source and the dichroic reflection element, and the light-condensing element condenses light from the second light source to an incident surface of the light collection device through the dichroic reflection element.
10. The laser beam combiner according to claim 7, 8 or 9, wherein the angle of incidence of the light beam emitted from the second light source on the incident surface of the light collecting device is smaller than the angle of incidence of the light beam emitted from the first light source on the incident surface of the light collecting device.
11. A projection apparatus comprising the laser beam combining device according to any one of claims 1 to 10.
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| CN201520162028.5U CN204575981U (en) | 2015-03-20 | 2015-03-20 | Laser Multiplexing apparatus and projector equipment |
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| CN204575981U true CN204575981U (en) | 2015-08-19 |
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| CN105573035A (en) * | 2015-12-23 | 2016-05-11 | 深圳市帅映科技有限公司 | Projector extensible to laser light source |
| CN107918213A (en) * | 2016-10-07 | 2018-04-17 | 科视数字系统美国股份有限公司 | A kind of device for beam combination |
| WO2019052126A1 (en) * | 2017-09-14 | 2019-03-21 | 深圳光峰科技股份有限公司 | Light source system and projection system |
| CN110082998A (en) * | 2018-01-25 | 2019-08-02 | 深圳光峰科技股份有限公司 | Laser Multiplexing apparatus and display equipment |
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| CN105573035A (en) * | 2015-12-23 | 2016-05-11 | 深圳市帅映科技有限公司 | Projector extensible to laser light source |
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| CN107918213A (en) * | 2016-10-07 | 2018-04-17 | 科视数字系统美国股份有限公司 | A kind of device for beam combination |
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| US20210278683A1 (en) * | 2018-01-25 | 2021-09-09 | Appotronics Corporation Limited | Laser Combining Apparatus and Display Device |
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