WO2019090958A1 - Système de source de lumière et dispositif de projection utilisant le système de source de lumière - Google Patents

Système de source de lumière et dispositif de projection utilisant le système de source de lumière Download PDF

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Publication number
WO2019090958A1
WO2019090958A1 PCT/CN2018/071425 CN2018071425W WO2019090958A1 WO 2019090958 A1 WO2019090958 A1 WO 2019090958A1 CN 2018071425 W CN2018071425 W CN 2018071425W WO 2019090958 A1 WO2019090958 A1 WO 2019090958A1
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Prior art keywords
light
light source
spot
source system
reflective
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PCT/CN2018/071425
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English (en)
Chinese (zh)
Inventor
侯海雄
唐晓峰
李屹
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深圳光峰科技股份有限公司
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Publication of WO2019090958A1 publication Critical patent/WO2019090958A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings

Definitions

  • the present invention relates to the field of optical technologies, and in particular, to a light source system and a projection apparatus using the same.
  • the advantages of laser light source in the field of cinema light sources are gradually revealed.
  • the efficiency of laser phosphor conversion to yellow fluorescence is 50%, which means that 50% of the laser energy is emitted in the form of heat.
  • the temperature rise of the fluorescent color wheel will affect the fluorescence output, in the technical field of phosphors, When the temperature rises, the decrease in the fluorescence output power causes thermal quenching.
  • the output light flux of the laser light source can reach tens of thousands of lumens, which can meet the requirements of general cinema light sources.
  • the laser light source is required to have a larger luminous flux output.
  • the present invention provides a light source system comprising a first light source module and a second light source module and a light combining device, the first light source module generates a first light, and the second light source module generates a second light; the first light is incident on The light combining device forms a first light spot, and the second light is incident on the light combining device to form a second light spot, and the light combining device combines the first light spot and the second light spot and simultaneously projects into the entrance of a light machine system. Glossy.
  • the present invention also provides a projection apparatus including the above-described light source system.
  • the light combining device of the light source system of the present invention projects the first spot and the second spot to the light incident surface of the light machine system, so that the light fluxes of the first light and the second light simultaneously enter the light incident surface of the light machine system, thereby increasing the projection.
  • the luminous flux to the optomechanical system increases the output brightness of the optomechanical system.
  • FIG. 1 is a schematic structural view of a light source system according to a first embodiment of the present invention.
  • FIG. 2 is a schematic plan view of a region beam splitter of a light source system according to a first embodiment of the present invention.
  • FIG 3 is a schematic structural view of a light combining device of a light source system according to a first embodiment of the present invention.
  • FIG. 4 is a schematic diagram of another optical path of a light source system according to a first embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a light combining device of a light source system according to a second embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a forming process of a light combining device of a light source system according to a second embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a light combining device of a light source system according to a third embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a light source system according to a fourth embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a light combining device of a light source system according to a fourth embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a light source system according to a fifth embodiment of the present invention.
  • Figure 11 is a schematic illustration of an embodiment of a light incident surface of a square bar of an optical machine.
  • Fig. 12 is a schematic view showing another embodiment of the light incident surface of the square rod of the optical machine.
  • FIG. 13 is a schematic structural diagram of a light source system according to a sixth embodiment of the present invention.
  • Light source system 100a, 100b, 100c, 100d Optical machine 7 Glossy surface 72, 72a, 72b First light source module 10 Second light source module 20 Reflective element 3, 4 Double telecentric lens system 6 Reflector 122, 123, 124 Upper laser module 111 Lower laser module 112 Reflective strip 121 Converging lens 131, 132 Square stick 14 Relay lens 151, 152 Regional beam splitter 16 Intermediate area 162 Surrounding area 164 Huang Guanglun 17 Collecting lens group 18 Scatter sheet 19 Cutting line g Light combining device 5a, 5b, 5c, 5d, 5e, 5f Reflector 51, 52 Reflective prism 54, 55a, 55b, 56a, 56b Right angle 541, 542 Bevel 543 side 544
  • the light source system of the invention is applied to a projection device for combining the spots emitted by two single light sources to be projected into the optical system, so that the luminous flux of the two light sources simultaneously enters the optical system, thereby improving the output brightness of the optical system.
  • the optomechanical system includes a glazing square bar 7, and a rectangular entrance surface 72 is formed at the entrance of the glazing bar 7.
  • the size of the light incident surface 72 is 10.45 mm ⁇ 19.56 mm.
  • the light spot emerging from the light source is imaged on the light incident surface 72 of the light machine square bar 7 into a rectangular spot having a size matching the size of the light incident surface 72 of the light machine bar 7.
  • FIG. 1 is a schematic structural diagram of a light source system 100a according to a first embodiment of the present invention.
  • the light source system 100a includes a first light source module 10 and a second light source module 20, reflective elements 3 and 4, a light combining device 5a, and a dual telecentric lens system 6.
  • the reflective elements 3 and 4 are two mirrors.
  • the first light source module 10 and the second light source module 20 have the same composition and structure, and are symmetrically disposed. It can be understood that, in other embodiments, the first light source module 10 and the second light source module 20 may also be asymmetrically disposed. In order to simplify the description, only the first light source module 10 will be described below.
  • the first light source module 10 includes an upper laser module 111, a lower laser module 112, a plurality of reflective elements, a plurality of focusing lenses, a shaping element, a plurality of relay lenses, a beam splitting element, a fluorescent wheel, a collecting lens group 18, and a scattering Slice 19.
  • the shaping element is a component capable of homogenizing and shaping light, such as a diffractive optical element, a fly-eye lens pair, a square bar, and the like.
  • the shaping element is a rod 14;
  • the beam splitting element is a region beam splitter 16;
  • the fluorescent wheel is a yellow light wheel 17;
  • these reflecting elements include a reflective strip 121, mirrors 122, 123, 124;
  • these focusing lenses include a focusing lens 131, 132.
  • These relay lenses include relay lenses 151, 152.
  • the upper laser module 111 and the lower laser module 112 are both 8 ⁇ 12 laser arrays.
  • the upper laser module 111 and the lower laser module 112 schematically only draw a 4 x 4 laser array.
  • the parallel light emitted from the upper laser module 111 and the lower laser module 112 is reflected by the corresponding reflection strip 121 and then spatially compressed, and then reflected by the mirror 122 and then focused by the focus lens 131 to the square rod 14 for homogenization and shaping.
  • the square bar 14 By using the square bar 14, on the one hand, the laser spot which is subsequently focused on the yellow light wheel 17 is made more uniform, and the conversion efficiency of the yellow fluorescence is improved; on the other hand, the square bar 14 can shape the laser to make the shape and size of the laser spot and the light.
  • the shape of the light incident surface 72 of the square bar 7 matches.
  • the laser light emitted from the square bar 14 passes through the parallelization of the relay lens 151 and the relay lens 152, and enters the area beam splitter 16.
  • the intermediate region 162 of the regional beam splitter 16 is a transmissive blue laser; the peripheral region 164 of the regional beam splitter 16 reflects a blue laser that transmits a yellow laser.
  • the regional beam splitter can adopt the method that the central region transmits the excitation light and the reflected laser light, or the central region reflects the excitation light and transmits the laser light to perform the splitting. Therefore, the blue light transmitted through the intermediate portion 162 of the regional beam splitter 16 is focused by the collecting lens group 18 onto the reflective diffusing film 19, and the function of the diffusing sheet 19 is to reduce the coherence of the laser light, since the collecting lens group 18 is the counterpart rod 14
  • the exit pupil image is focused, so that a rectangular spot is formed on the diffuser sheet 19, and the size of the rectangular spot is 2.43 mm x 2.59 mm.
  • the blue light distribution reflected back from the rectangular spot is a Lambertian distribution which, after being parallelized by the collecting lens group 18, reaches the area beam splitter 16, is reflected to the focusing lens 132, and is then reflected by the reflecting element 4 in the A position of FIG. Focusing on a blue rectangular spot.
  • the size of the blue rectangular spot is 10.45 mm x 9.78 mm.
  • the blue laser light passing through the peripheral region 164 of the regional beam splitter 16 is reflected to the yellow light wheel 17 to excite yellow fluorescence.
  • the blue light power of the substrate incident on the yellow light wheel 17 is 550 W, and finally is also focused to a yellow rectangular spot of 10.45 mm ⁇ 9.78 mm at the A position of Fig. 1, a yellow rectangular spot and a blue rectangular spot.
  • the overlay forms a white rectangular spot.
  • the optical path of the second light source module 20 is the same as that of the first light source module 10, and the light emitted by the second light source module 20 forms a white rectangular spot at the B position of FIG.
  • the light combining device 5a includes two mirrors 51 disposed vertically.
  • the two mirrors 51 are symmetrically arranged with respect to a horizontal plane (XZ plane).
  • the angle between each mirror 51 and the horizontal plane is 45 degrees.
  • the outer side surface of the two mirrors 51 is a reflecting surface, and the two reflecting surfaces are perpendicular to each other and symmetrically arranged with respect to a horizontal plane.
  • the light reflected by the rectangular mirror 51 at the A position can be regarded as the light directly emitted from the virtual object A1.
  • the light reflected by the rectangular spot at the B position through the lower mirror 51 can be regarded as the light directly emitted from the virtual object B1.
  • the rectangular spot in which the virtual object A1 and the virtual object B1 are combined is imaged by the double telecentric lens system 6 on the light incident surface 72 of the optical machine square bar 7.
  • the inverted images W1 and W2 formed by the virtual object A1 and the virtual material B1 each occupy half of the light incident surface 72 of the optical machine bar 7.
  • the spot at the A position, the spot at the B position, and the light incident surface 72 of the optical square bar 7 are both rectangular, and the rectangular spot at the A position and the rectangular spot at the B position are coupled to the optical bar 7 to be more efficient than the circle.
  • the shape spot is coupled to the square rod 7 of the optical machine with high efficiency.
  • the object main ray and the image main ray of the double telecentric lens system 6 are parallel to the optical axis, and the light caused by the positional tolerances of the first light source module 10, the second light source module 20 and the double telecentric lens system 6 during installation can be avoided.
  • the coupling efficiency of the machine bar 7 becomes lower.
  • the spot emerging from the first light source module 10 increases with the propagation path, the spot gradually becomes smaller.
  • the spot is minimized, and then the spot becomes larger as the propagation path increases.
  • a part of the light is not reflected by the mirror 51 and continues to propagate downward, and a part of the luminous flux is lost.
  • the lost luminous flux is equal to about 6% of the total luminous flux.
  • the spot emitted by the second light source module 20 also loses a part of the luminous flux.
  • FIG. 4 is a schematic diagram of another optical path of the light source system 100 according to the first embodiment of the present invention.
  • the light combining device 5a ie, the two mirrors 51
  • the light emitted by the first light source module 10 and the second light source module 20 is reflected by the reflective element 3 and the second reflective element 4, respectively, in FIG. 4C.
  • the position is focused into a rectangular spot.
  • the two rectangular spots are the same size and overlap.
  • the light combining device 5a ie, the two mirrors 51
  • the light emitted from the first light source module 10 and the second light source module 20 is reflected by the reflecting surfaces of the two reflecting mirrors 51 to form two rectangular spots arranged one above the other. That is, the C1 position and the C2 position in Fig. 4 are respectively focused into a rectangular spot.
  • the rectangular spot in which the C1 position and the C2 position are combined forms an image W1 and W2 on the light incident surface 72 of the optical machine bar 7 through the double telecentric lens system 6.
  • the two mirrors 51 are in line contact, that is, there is a gap between the reflecting surfaces of the two mirrors 51, which will result in C1.
  • the rectangular spot at the position and the C2 position cannot be fitted, and there is also a certain gap, thereby affecting the uniformity of the light projected to the light incident surface 72 of the square bar 7 of the optical machine.
  • the present invention further improves the light combining device, so that the two rectangular spots can be coupled to the light entering the optical system seamlessly and non-coincidentally. Face 72.
  • a light combining device 5b of a light source system includes two mirrors 52 symmetrically disposed with respect to a horizontal plane (XZ plane).
  • the two mirrors 52 are placed perpendicular to each other, and the reflecting surfaces of the two mirrors 52 are in seamless contact, so that the light emitted from the first light source module 10 and the second light source module 20 is reflected by the two mirrors 52 to form an upper and lower arrangement without gaps.
  • the two rectangular spots W1 and W2 can be closely attached together, that is, the two rectangular spots W1 and W2 are projected to the light incident surface 72 seamlessly and non-coincidentally.
  • the light combining device 5b seamlessly couples the two rectangular spots W1 and W2 to the light incident surface 72, so that the luminous fluxes of the first light source module 10 and the second light source module 20 simultaneously enter the optical system, thereby improving the output brightness of the optical system.
  • the ends of the two mirrors 51 of the light combining device 5a of the first embodiment can be respectively cut off by a triangular prism.
  • the two bottom surfaces of the triangular prism are isosceles right triangles, and the length of the right angle side is the thickness of the mirror.
  • the height of the triangular prism is the height of the mirror (as shown in Figure 6).
  • the portion between the two cut lines g of the two mirrors 51 is the portion to be cut, and the height direction refers to the direction perpendicular to the right-angled surface, so that it coincides with the height of the mirror 51.
  • the light combining device 5c of the light source system according to the third embodiment of the present invention may also be an integrally formed L-shaped mirror to make seamless contact between the two reflecting surfaces (outer sides of the L-shaped mirror).
  • FIG. 8 is a schematic structural diagram of a light source system 100b according to a fourth embodiment of the present invention.
  • the light source system 100b of the fourth embodiment is the same as the light path of the light source system 100a in the first embodiment except for the structure of the light combining device.
  • the light combining device 5d is a reflective prism 54 of a unitary structure.
  • the light combining device 5d adopts an overall structure, which makes it easier to control processing and assembly errors.
  • the cross section of the reflecting prism 54 is an isosceles right triangle.
  • the inclined surface 543 of the reflecting prism 54 is perpendicular to a horizontal plane (XZ plane), and the angles of the two right-angled surfaces 541 of the reflecting prism 54 and the horizontal plane (XZ plane) are respectively 45 degrees.
  • the slope 543 of the reflecting prism 54 is perpendicular to the horizontal plane (XZ plane).
  • the two right-angled faces 541 of the reflecting prism 54 are reflecting surfaces. That is, the two reflecting surfaces are perpendicular to each other and symmetrically arranged with respect to the horizontal plane.
  • the light combining device 5d When the light combining device 5d is not placed in the optical path, the light emitted by the first light source module 10 and the second light source module 20 is reflected by the reflective element 3 and the second reflective element 4 and then focused into a rectangular spot at the D position of FIG. 8, respectively.
  • the two rectangular spots are the same size and overlap.
  • the light combining device 5d When the light combining device 5d is placed in the optical path, the light emitted by the first light source module 10 and the second light source module 20 is reflected by the reflective element 3 and the second reflective element 4 and reflected by the light combining device 5d, respectively, at the position D1 of FIG. 8 and The D2 position is focused into a rectangular spot, and the rectangular spots of the D1 position and the D2 position are arranged seamlessly up and down, and the images W1 and W2 are formed on the light incident surface 72 of the optical machine bar 7 by the double telecentric lens system 6.
  • a high-reflection film is plated on the two right-angled faces 541 of the reflecting prism 54.
  • FIG. 10 is a schematic structural diagram of a light source system 100c according to a fifth embodiment of the present invention.
  • the light source system 100c of the fifth embodiment is different from the light source system 100a of the first embodiment in the structure of the light combining device.
  • the light combining device 5e of the fifth embodiment includes two reflecting prisms 55a, 55b.
  • the two reflecting prisms 55a, 55b are symmetrically arranged with respect to a horizontal plane (XZ plane).
  • the cross section of each of the reflecting prisms 55a, 55b is an isosceles right triangle, and the inclined surface of each of the reflecting prisms 55a, 55b faces the horizontal plane and is at an angle of 45 degrees with respect to the horizontal plane.
  • the slope of each of the reflecting prisms 55a, 55b is a reflecting surface, that is, the two reflecting surfaces are perpendicular to each other and symmetrically arranged with respect to the horizontal plane.
  • the light emitted from the first light source module 10 first passes through the reflective element 3 and is focused on the right-angled surface E1 of the reflective prism 55a into a rectangular spot that matches the size of the right-angled surface E1 of the reflective prism 55a, and enters the inclined surface of the reflective prism 55a. After the light is incident on the slope, total reflection occurs from the other right angle plane E3.
  • the light emitted by the second light source module 20 first passes through the reflective element 4 and is focused at a right angle E2 of the reflective prism 55b into a rectangular spot that matches the size of the right angle of the reflective prism 55b, and enters the right angle of the reflective prism 55b.
  • the light of the surface is incident on the inclined surface, total reflection occurs from the other right-angled surface E4.
  • the light emitted from the right-angled faces of the reflecting prisms 55a, 55b is collected by the double telecentric lens system 6 to the light incident surface 72 of the optical machine bar 7.
  • Corresponding to the rectangular spot which is seamlessly arranged and not coincident at the combination of E3 and E4 is imaged by the double telecentric lens system 6 to the light incident surface 72 of the optical machine bar 7 to form images W1 and W2.
  • the inclined surface of the reflective prisms 55a, 55b is plated with a high reflective film; at the same time, the two sides of the reflective prisms 55a, 55b are polished to have good total reflection performance, and the light is prevented from directly exiting from the side. Increases the efficiency of the light emitted by the reflective prism.
  • the light incident surface 72 of the optical square bar 7 is divided into two rectangles along the center of the long side, and the rectangular light spot emitted by the first light source module 10 and the second light source module 20 is combined with the light combining device and the double telecentric lens.
  • System 6 projects onto the two rectangles, respectively.
  • the light incident surface 72 of the optical machine bar 7 is divided into two rectangles along the center of the short side, and the positions of the first light source module 10, the second light source module 20, the light combining device, or the optical square bar are adjusted. Rectangular spots emerging from a light source module 10 and a second light source module 20 can be projected onto the two rectangles, respectively.
  • FIG. 13 is a schematic structural diagram of a light source system 100d according to a sixth embodiment of the present invention.
  • the sixth embodiment is to change the size and shape of the square bar 14 of the first light source module 10 and the second light source module 20 (please refer to FIG. 1 again), so that the first light source module 10 and the second light source module 20 emit a focused rectangle.
  • the spot size is 19.56 mm x 5.225 mm and is then focused on the entrance of the optical machine bar 7 by means of two reflective prisms 56a and 56b (the cross section of each of the reflective prisms 56a, 56b is an isosceles right triangle) and the double telecentric lens system 6.
  • the smooth surface 72, the final spot size of the two spots W side by side is 19.56 mm x 10.45 mm.
  • the light combining device of the light source system of the present invention projects a rectangular spot formed by the light emitted by the first light source module and the second light source module onto a rectangular light incident surface of the optical system, thereby improving the efficiency of the spot coupling into the optical system, so that The luminous flux of the light emitted by the light source module and the second light source module simultaneously enters the optical system, increasing the luminous flux projected to the optical system and improving the output brightness of the optical system.
  • the invention uses a semiconductor laser as an excitation light source, and the laser has the advantages of high energy density and small optical expansion amount, and the phosphor is excited to generate high-efficiency fluorescence, and a light source with high energy density can be obtained, which is applied in the field of illumination, especially for beam quality requirements. Higher occasions have an absolute advantage. Therefore, the novel light source system applied in the field of illumination provided by the present invention is particularly suitable for applications where the beam quality requirements are relatively high, and has a good generalization effect on the application field of the extended laser phosphor light source.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Projection Apparatus (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

La présente invention concerne un système de source de lumière (100a, 100b, 100c, 100d) et un dispositif de projection utilisant le système de source de lumière (100a, 100b, 100c, 100d). Le système de source de lumière (100a, 100b, 100c, 100d) comprend un premier module de source de lumière (10), un second module de source de lumière (20) et un composant de combinaison de lumière (5a, 5b, 5c, 5d, 5e, 5f), le premier module de source de lumière (10) générant une première lumière et le second module de source de lumière (20) générant une seconde lumière. La première lumière est incidente sur le composant de combinaison de lumière (5a, 5b, 5c, 5d, 5e, 5f) de façon à former un premier point, tandis que la seconde lumière est incidente sur le composant de combinaison de lumière (5a, 5b, 5c, 5d, 5e, 5f) de façon à former un second point, et le composant de combinaison de lumière (5a, 5b, 5c, 5d, 5e, 5f) combine et projette le premier point et le second point sur une surface d'incidence (72) d'un système de machine optique. Le composant de combinaison de lumière (5a, 5b, 5c, 5d, 5e, 5f) du système de source de lumière (100a, 100b, 100c, 100d) fait en sorte que le flux lumineux de la première lumière et celui de la seconde lumière entrent en même temps dans le système de machine optique de façon à améliorer la luminosité de sortie du système de machine optique.
PCT/CN2018/071425 2017-11-13 2018-01-04 Système de source de lumière et dispositif de projection utilisant le système de source de lumière WO2019090958A1 (fr)

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