WO2020199670A1 - 光源系统及投影设备 - Google Patents

光源系统及投影设备 Download PDF

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Publication number
WO2020199670A1
WO2020199670A1 PCT/CN2019/127280 CN2019127280W WO2020199670A1 WO 2020199670 A1 WO2020199670 A1 WO 2020199670A1 CN 2019127280 W CN2019127280 W CN 2019127280W WO 2020199670 A1 WO2020199670 A1 WO 2020199670A1
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WO
WIPO (PCT)
Prior art keywords
prism
light
image
emitted
spatial
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PCT/CN2019/127280
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English (en)
French (fr)
Inventor
杜鹏
郭祖强
李屹
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深圳光峰科技股份有限公司
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Publication of WO2020199670A1 publication Critical patent/WO2020199670A1/zh

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/208—Homogenising, shaping of the illumination light
    • 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 technology, in particular to a light source system and projection equipment.
  • the commonly used spatial light modulators include DMD, LCD, and LCOS.
  • LCD is a transmissive polarizing device and is also the most mature light modulator. Its disadvantages are poor heat dissipation, low aperture ratio, and response time. It is difficult to achieve high-brightness, color (time-sequential three primary colors) projection display on a single chip, so three-chip LCD projection technology is commonly used. Since LCD modulation is only for polarized light, more polarizing devices are required in the optical path, and the optical path structure is complicated. DMD and LCOS are reflective devices.
  • DMD uses the inversion of the micromirror unit to spatially distinguish the input illuminating light and the output image light
  • LCOS is similar to the LCD using polarization characteristics to distinguish illuminating light and image light.
  • the reflective modulator has the advantages of good scattering performance, high aperture ratio, and high modulation rate. Take DMD as an example. Common household, business, education and other markets use single-chip projection systems, while theaters use three-chip projection systems.
  • the monolithic system has a simple opto-mechanical structure, and the light source needs to provide sequential illumination light, which modulates the image light sequentially through SLM; in the three-chip system, the light source provides white-light illuminating light, and the illuminating light is incident on the The RGB monochromatic image light is respectively modulated on the SLM, and then the color image light is synthesized through the light combining device.
  • the related art light source system includes a light source, a square rod, a relay lens, a beam splitter, a TIR prism, a spatial light modulator, and a projection lens.
  • the light source provides sequential illumination light, which respectively passes through the square rod, the relay lens, the light splitting device, the TIR prism, the spatial light modulator, and the projection lens in order.
  • the illuminating light of the related art light source system passes through the square rod, the relay lens, and the light splitting device, and then passes through the spatial light modulator to combine the light and enter the projection lens.
  • the above-mentioned projection system requires a long back focal length of the projection lens, which makes the design of the lens more difficult and the volume of the lens increases, and the cost of the lens and the volume of the projection system increase.
  • the blue illuminating light is usually provided by a blue laser, and the red and green illuminating light is excited by the blue laser to generate fluorescence, and then the color is corrected by the filter. get.
  • red illuminating light is usually excited by laser to produce yellow phosphor with a broad spectrum.
  • the filter filters out the green light in the fluorescence and transmits the red light. Therefore, the SLM modulates the red light image. At a time, more green light will be lost, and green light usually contributes the most to the brightness, so the output brightness of the monolithic SLM projection system is limited.
  • the light source In a two-chip SLM system, there are two ways of lighting photosynthesis in time sequence and space; at the first moment, the light source outputs blue illuminating light to illuminate a piece of SLM, at the second moment, the light source outputs yellow illuminating light in the light machine The light is split, and the red light and the green light illuminate the two SLMs respectively, and the red and green lights have no loss of sequential light splitting.
  • the light splitting and light combining device uses a coating method to achieve wavelength splitting.
  • the illuminating light is a collection of many light cones emitted by the light source, and each light cone has a certain light cone angle
  • the coating of the light combining device is a key factor affecting the function of wavelength and incident angle.
  • the incident angle of the light is different, and the energy and spectrum of the light transmitted are different.
  • the optical path and the light combining and splitting device are complicated and difficult to process.
  • the purpose of the present invention is to overcome the above technical problems, and provide a light source system and projection equipment that can ensure the uniformity of the coating properties of the light splitting and combined light, reduce the assembly and process difficulty, and have a good user experience.
  • the present invention provides a light source system, which includes:
  • Light-emitting device used to emit sequential illumination light
  • the light splitting device is arranged on the light path of the illumination light, and is used to divide the illumination light into the first light transmitted along the first light channel and the second light transmitted along the second light channel;
  • a prism component wherein the prism component is a symmetric structure made by gluing a plurality of prisms, and a light combining device is provided on the glue surface of the prism component along the direction of the symmetry axis;
  • the first spatial light modulator and the second optical spatial modulator are respectively arranged on both sides of the symmetry axis of the prism assembly, and the first spatial light modulator receives the first light and modulates the first light into The first image light, the second spatial light modulator receives the second light and modulates the second light into a second image light, the first image light and the second image light from the
  • the two sides of the symmetry axis of the prism component are incident into the prism component, and the light is combined by the light combining device and then emitted along the same channel.
  • the light source system further includes a light homogenizing device arranged between the light emitting device and the light splitting device, the light homogenizing device is used to homogenize the illumination light emitted by the light emitting device, and the light splitting device It is arranged at the telecentric position of the optical path of the homogenizing device.
  • the prism component is made by cementing 4 prisms or 6 lenses.
  • the prism assembly includes a first prism and a second prism cemented and symmetrically arranged, and a third prism and a fourth prism cemented with the first prism and the second prism respectively, the third prism and the second prism
  • the fourth prism is arranged symmetrically with respect to the bonding surface of the first prism and the second prism; the first light emitted from the light splitting device enters the third prism, and the light passing through the third prism is connected to the first prism.
  • the sides of the prism glued together are totally reflected after being emitted from the third prism and incident on the first spatial light modulator.
  • the first spatial light modulator modulates the received first light into the first image light, so The first image light passes through the third prism and the first prism to enter the light combining device; the second light emitted from the light splitting device enters the fourth prism and passes through the fourth prism After the side surface cemented with the second prism is totally reflected, it is emitted from the fourth prism and incident to the second spatial light modulator, and the second spatial light modulator modulates the received second light The second image light passes through the fourth prism and the second prism and enters the light combining device.
  • the light source system further includes a first relay system arranged between the light splitting device and the third prism, and a second relay system arranged between the light splitting device and the fourth prism,
  • the first relay system is used for guiding the first light emitted from the light splitting device to the third prism; the second relay system is used for guiding the second light emitted from the light splitting device The light is guided to the fourth prism.
  • the prism assembly includes a first prism and a second prism cemented and symmetrically arranged, a third prism cemented with the first prism, a fourth prism cemented with the second prism, and a fourth prism cemented with the second prism.
  • a fifth prism cemented with the third prism, a sixth prism cemented with the second prism and the fourth prism, the third prism and the fourth prism are related to the first prism and the first prism
  • the bonding surfaces of the two prisms are arranged symmetrically, and the fifth prism and the sixth prism are arranged symmetrically with respect to the bonding surfaces of the first prism and the second prism; the first prism exiting from the light splitting device
  • the first spatial light modulator modulates the received first light into the first image light, and the first image light passes through the fifth prism, the third prism, and the first prism.
  • the second light emitted from the light splitting device enters the sixth prism, and is totally reflected by the side surface of the sixth prism cemented with the second prism and the fourth prism Emitted from the sixth prism and incident on the second spatial light modulator, the second spatial light modulator modulates the received second light into the second image light, and the second image light Passing through the sixth prism, the fourth prism, and the second prism and entering the light combining device.
  • the first image light emitted by the first spatial light modulator is mixed with first non-image light, and the first non-image light passes through the third prism or/and the fifth prism.
  • the side surface of the first prism is totally reflected and then emitted from the prism assembly; the second image light emitted by the second spatial light modulator is mixed with second non-image light, and the second non-image light passes through the
  • the side surfaces of the fourth prism or/and the sixth prism cemented with the second prism are totally reflected and emitted from the prism component.
  • the light source system further includes a third relay system arranged between the light splitting device and the fifth prism, and a fourth relay system arranged between the light splitting device and the sixth prism.
  • the third relay system is used to guide the first light emitted from the light splitting device to the fifth prism;
  • the fourth relay system is used to guide all the light emitted from the light splitting device The second light is guided to the sixth prism.
  • the light combining device is a light splitting film.
  • the present invention also provides a projection device, which includes the light source system of any one of the above.
  • the present invention provides a light source system including: the light emitting device is used to emit the illumination light in time sequence; the light splitting device is arranged on the optical path of the illumination light, and the illumination light Divided into the first light transmitted along the first light channel and the second light transmitted along the second light channel; the prism assembly has the combined light provided on the glue surface along the direction of the symmetry axis Device; the first spatial light modulator and the second optical spatial modulator are respectively arranged on both sides of the symmetry axis of the prism assembly, receiving the first light and the second light to modulate the first One image light and the second image light, the first image light and the second image light respectively enter the prism assembly from both sides of the symmetry axis of the prism assembly, and are combined by the light combining device The light is emitted along the same channel.
  • the light source system and projection equipment of the present invention are designed to make the illumination light modulated into image light in the light source system and projection equipment of the present invention, so that the modulated image light is transmitted in the glass medium, compared with the traditional In the air transmission, the actual optical path is shortened, thereby reducing the back focus of the lens, and can achieve better uniformity, avoid the use of gradient coating, and have high structural precision, reducing the difficulty of optical path adjustment and production process. Good user experience.
  • Fig. 1 is a schematic structural diagram of a first embodiment of a light source system of the present invention
  • FIG. 2 is a schematic structural diagram of an integrated prism of the first embodiment of the light source system of the present invention
  • FIG. 3 is a schematic structural diagram of a second embodiment of the light source system of the present invention.
  • FIG. 4 is a schematic structural diagram of an integrated prism in a second embodiment of the light source system of the present invention.
  • FIG. 5 is a schematic structural diagram of a third embodiment of the light source system of the present invention.
  • FIG. 6 is a schematic structural diagram of an integrated prism of a third embodiment of the light source system of the present invention.
  • Fig. 7 is a schematic structural diagram of a fourth embodiment of the light source system of the present invention.
  • Fig. 8 is a schematic diagram of the structure of an integrated prism of the fourth embodiment of the light source system of the present invention.
  • the invention provides a light source system including a light source, a light splitting device, a spatial light modulator, a prism assembly and a receiving device.
  • the prism assembly is a symmetrical structure made by gluing a plurality of prisms
  • a light combining device is arranged on the glued surface of the prism assembly along the direction of the symmetry axis
  • the spatial light modulator is arranged on both sides of the prism assembly
  • the light source emits sequential illumination light
  • the light splitting device splits the illumination light and outputs it to the two spatial light modulators respectively, and the light modulated by the two spatial light modulators passes through the prism assembly to combine the light.
  • the combined light enters the receiving device, and is output from the receiving device to the outside.
  • the present invention also provides a projection device, including the light source system. Specifically, the present invention will be described in detail with four embodiments:
  • the light source system provided by the present invention includes a light source 101, a light homogenizing device 102, a relay system 103, a light splitting device 304, a spatial light modulator 106, a prism assembly 108, and a receiving device 107.
  • the light source 101 may be a bulb, an LED light source, a laser light source, or a secondary excited fluorescent light source, but it is not limited thereto.
  • the light source 101 emits sequential illumination light, such as blue and yellow sequential illumination light, purple and yellow sequential illumination light, etc.;
  • the receiving device 107 is a projection lens for receiving the emitted image light;
  • the optical device 102 is a square rod for homogenizing the light beam emitted by the light source 101;
  • the beam splitting device 304 is a beam splitting lens, which is arranged on the light path of the illumination light, and is used to divide the illumination light along the first The first light transmitted by one optical channel and the second light transmitted along the second optical channel, the light splitting device 304 realizes wavelength splitting by means of coating.
  • the homogenizing device 102 and the relay system 103 are arranged between the beam splitting device 304 and the light source 101, and the beam splitting device 304 is arranged at a telecentric position of the optical path of the beam homogenizing device 102.
  • the beam splitter 304 is located at the telecentric position of the optical path, which can ensure the illuminance and color uniformity of the projected image.
  • the exit surface of the homogenizing device 102 ie, the square rod
  • emits the same cone of light from each field of view, and the main optical axes are parallel to each other. When each cone of light passes through the beam splitter 304, the transmitted energy and spectrum are the same.
  • the relay system 103 includes at least two lenses, and the lenses are used to condense the illuminating light onto the light splitting device 304.
  • the relay system 103 includes two lenses, namely a lens 103a and a lens 103b.
  • the prism component 108 is a symmetrical structure made by gluing a plurality of prisms.
  • the number of prisms is an even multiple, and the prism components 108 are distributed and arranged along the axis of symmetry on both sides of the symmetry axis of the prism component 108.
  • a light combining device (not shown in the figure) is arranged on the glued surface along the direction of the symmetry axis.
  • the light combining device realizes wavelength light combining by coating, and the light combining device is arranged along the direction of the symmetry axis.
  • the light combining device is a spectroscopic film, that is, a spectroscopic coating.
  • a first spatial light modulator 106b receives the first light and modulates the first light into a first image light
  • the second spatial light modulator 106a receives the second light and modulates the The second light is modulated into a second image light
  • the first image light and the second image light respectively enter the prism assembly from both sides of the symmetry axis of the prism assembly 108 and pass through the prism assembly.
  • the receiving device 107 is a projection lens.
  • the light combining device is arranged on the glued surface of the symmetrical structure of the prism assembly, and the prism assembly and the first spatial light modulator 106b and the second spatial light modulator 106a are arranged symmetrically along the glued surface.
  • the light splitting device 304 The bonding surface is in the same plane, that is, the light splitting device 304 and the light combining device are in the same plane.
  • the prism component 108 in this embodiment is made by glueing 4 prisms. As shown in Figure 2, there are four prisms A, B, C, and D. It includes a first prism D and a second prism C cemented and symmetrically arranged, and a third prism A and a fourth prism B cemented with the first prism D and the second prism C, respectively.
  • the third prism A and the fourth prism B are TIR prisms, and the TIR prisms are total internal reflection prisms.
  • the third prism A and the fourth prism B are arranged symmetrically with respect to the bonding plane of the first prism D and the second prism C, and the light combining device (light splitting coating) is located on the first prism D and The glued surface of the two prism C.
  • the first light emitted from the light splitting device 304 enters the third prism A, is totally reflected by the side surface of the third prism A cemented with the first prism D, and then exits the third prism A and It is incident on the first spatial light modulator 106a, the first spatial light modulator 106b modulates the received first light into the first image light, and the first image light passes through the third prism A and the first prism D are incident on the light combining device; the second light emitted from the light splitting device 304 enters the fourth prism B, and the second light from the fourth prism B and the second light The cemented side surface of the prism C is totally reflected after being emitted from the fourth prism B and incident to the second spatial light modulator 106b.
  • the second spatial light modulator 106a modulates the received second light into For the second image light, the second image light passes through the fourth prism B and the second prism C and enters the light combining device.
  • the first prism D and the second prism C are designed as a polygonal structure, and the third prism A and the fourth prism B are designed as a triangular structure.
  • the first prism D is an irregular quadrilateral structure, and the third prism A is attached to the first prism D and the second prism D C is on the adjacent side of the bonding surface.
  • the fourth prism B is attached to an adjacent side surface of the bonding surface of the second prism C and the first prism D.
  • the second spatial light modulator 106a is located on the side of the fourth prism B away from the second prism C, and the first spatial light modulator 106b is located on the third prism A away from the first prism. D's side.
  • each prism can be the entire side gluing, or the edge area gluing, such as the partial gluing of the air gap in the middle part.
  • the light source system also includes a first relay system (not shown) arranged between the beam splitting device 304 and the third prism A, and a first relay system (not shown) arranged between the beam splitting device 304 and the fourth prism B.
  • a second relay system (not shown), the first relay system is used to guide the first light emitted from the light splitting device 304 to the third prism; the second relay system is used to direct The second light emitted from the light splitting device 304 is guided to the fourth prism.
  • the light combining device (light splitting coating) is located at the bonding surface of the first prism D and the second prism C, so that the modulated image light is on the glass medium Compared with the traditional mid-air transmission, the actual optical path length is shortened, thereby reducing the back focal length of the receiving device 107 (projection lens).
  • the integrated prism ensures the positioning accuracy of the TIR prism (the third prism A and the fourth prism B), and reduces the difficulty of optical path adjustment and production process.
  • the light source system includes a light source 101 , Homogenizing device 102, relay system 103, light splitting device 304, spatial light modulator 106, prism assembly 208, and receiving device 107.
  • the light source 101 emits illuminating light sequentially
  • the receiving device 107 is a projection lens
  • the light homogenizing device 102 is a square rod
  • the light splitting device 304 is a light splitting lens.
  • the prism assembly 208 is made of 4 prisms glued together. It includes four prisms A, B, C, and D.
  • the third prism A and the fourth prism B are TIR prisms.
  • the light After passing through the third prism A and the fourth prism B, the light enters the first spatial light modulator 106b and the second spatial light modulator 106a respectively, and passes through the first spatial light modulator 106b and the second spatial light modulator respectively.
  • the light modulated by the device 106a passes through the first prism D and the second prism C respectively, and the light is combined on the light combining device on the bonding surface of the first prism D and the second prism C. Enter the receiving device 107.
  • the first prism D and the second prism C are irregular quadrilateral structures
  • the third prism A and the fourth prism B are triangular structures
  • the third prism A and the fourth prism B are symmetrically arranged with respect to the bonding surface of the first prism D and the second prism C. That is to say, the third prism A is attached to the non-adjacent side of the bonding surface of the first prism D and the second prism C of the first prism D
  • the fourth prism B is attached On the non-adjacent side of the bonding surface of the second prism C and the first prism D of the second prism C.
  • the first spatial light modulator 106b and the second spatial light modulator 106a are arranged on the side of the first prism D and the second prism C away from the third prism A and the fourth prism B, respectively.
  • a plurality of reflecting mirrors 109 and a plurality of reflecting mirrors 109 are arranged between the A lens used to converge the optical path, and the lens is used to realize the folding of the optical path and correct the incident angle of the prism component 108.
  • two reflecting mirrors ie, reflecting mirror 109a and reflecting mirror 109b are provided on both sides of the prism assembly 108.
  • this embodiment can transmit the illumination light to the surface of the spatial light modulator 106 through the reflector 109 and the lens, and the image light is combined inside the prism assembly 208 , And finally enter the receiving device 107, that is, the projection lens, so as to ensure the clarity of the projected image.
  • the light source system includes a light source 101, a homogenizing device 102, The relay system 103, the light splitting device 304, the spatial light modulator 106, the prism assembly 308, and the receiving device 107.
  • the light source 101 emits illuminating light sequentially
  • the receiving device 107 is a projection lens
  • the light homogenizing device 102 is a square rod
  • the light splitting device 304 is a light splitting lens.
  • the prism assembly 308 is a symmetrical structure made of 6 prisms glued together, including a total of six prisms A, B, C, D, E, and F. Including the first prism D and the second prism C on both sides of the symmetry plane, the third prism A and the fourth prism B, the fifth prism E cemented with the first prism D and the third prism A, and the second prism C and the fourth prism.
  • the sixth prism F glued by prism B.
  • the first prism D and the second prism C are respectively located on both sides of the symmetry axis, the third prism A and the fourth prism B are arranged symmetrically with respect to the bonding surface of the first prism D and the second prism C, so The fifth prism E and the sixth prism F are symmetrically arranged with respect to the bonding plane of the first prism D and the second prism C.
  • the first prism D and the second prism C are both quadrangular structures, including a first edge forming a bonding surface, a second edge not adjacent to the first edge, and a connecting first edge and the second edge. The third edge and the fourth edge.
  • the third prism A, the fourth prism B, the fifth prism E, and the sixth prism F are all triangular prism prisms with a certain thickness in the direction perpendicular to the paper surface, and the first prism D is an example, the third prism A is attached to the third edge of the first prism D, and at the same time, the third prism A is attached to one edge of the fifth prism E; The prism E is attached to the second edge of the first prism D; similarly, the fourth prism B is attached to the third edge of the second prism C, and at the same time, the fourth prism B It is attached to one edge of the sixth prism F; the sixth prism F is attached to the second edge of the second prism C.
  • the fifth prism E and the sixth prism F are symmetrically arranged with respect to the bonding plane of the first prism D and the second prism C.
  • the third prism A and the fourth prism B are arranged symmetrically with respect to the bonding plane of the first prism D and the second prism C, and the third prism A and the fourth prism B are respectively attached to the On the third edge of the first prism D and on the third edge of the second prism C, and the edges of the third prism A and the fourth prism B both exceed the first prism D to which they are attached
  • a gap is formed between the third edge of the second prism C and the third edge of the second prism C and the corresponding third edge, and the fifth prism E and the sixth prism F are arranged in the gap.
  • the two sides of the fifth prism E are respectively connected to the first prism D and the third prism A
  • the two sides of the sixth prism F are respectively connected to the second prism C and the fourth prism B Connected.
  • the third prism A and the fourth prism B are TIR prisms.
  • the first light emitted from the beam splitting device 304 enters the third prism A, passes through the third prism A, and is totally reflected from the bonding surface of the third prism A and the fifth prism E, and then passes from the The third prism A emits and enters the first spatial light modulator 106b.
  • the first spatial light modulator 106b modulates the received first light into first image light, and the first image light passes through all
  • the third prism A, the fifth prism E, and the first prism D are incident on the light combining device.
  • the second light emitted from the light splitting device enters the second prism B, passes through the second prism B, and is totally reflected from the cemented surface of the second prism B and the sixth prism F.
  • the second prism B emits and enters the second spatial light modulator 106a, and the second spatial light modulator 106a modulates the received second light into second image light, and the second image light sequentially passes through
  • the second ridge B, the sixth prism F, and the fourth prism C are incident on the light combining device.
  • the first image light emitted by the first spatial light modulator 106b is mixed with first non-image light, and the exit angles of the first image light and the first non-image light are different. After the first non-image light passes through the third prism A and the fifth prism E in turn, the angle at which the first non-image light enters the total reflection surface of the fifth prism E satisfies the total reflection condition. Therefore, the first non-image light passes through the second prism E.
  • the pentaprism E emits from the fifth prism E after total reflection.
  • the second image light emitted by the second spatial light modulator 106a is mixed with second non-image light, and after the second non-image light passes through the fourth prism B and the sixth prism F in sequence, And it is emitted from the fourth prism after total reflection from the cemented surface of the sixth prism F and the second prism C.
  • the first image light and the second image light formed by the light source system enter the first prism D and the second prism C through the fifth prism E and the sixth prism F, respectively, and enter the In the receiving device 107, the integrated prism of the prism assembly 308 ensures the positioning accuracy of the third prism A and the fourth prism B, and reduces the difficulty of optical path adjustment and production process.
  • This embodiment also includes a third relay system provided between the beam splitting device 304 and the fifth prism E, and a fourth relay system provided between the beam splitting device 304 and the sixth prism F ,
  • the third relay system is used to guide the first light emitted from the light splitting device to the fifth prism;
  • the fourth relay system is used to guide the second light emitted from the light splitting device to the first light Six prisms.
  • this embodiment can prevent stray light such as non-image light from entering the lens to interfere with the image effect, and improve the contrast of the projected image.
  • the light source system includes a light source 101, a homogenizing device 102, The relay system 103, the light splitting device 304, the spatial light modulator 106, the prism assembly 408, the receiving device 107 and the light combining device (not shown).
  • the light source 101 emits illuminating light sequentially
  • the receiving device 107 is a projection lens
  • the light homogenizing device 102 is a square rod
  • the light splitting device 304 is a light splitting lens.
  • the prism component 408 is made of 6 prisms glued together.
  • the prism assembly 408 includes a first prism D and a second prism C, a third prism A and a fourth prism B, and a fifth prism E and a sixth prism F.
  • the first prism D and the two prisms C are glued and arranged symmetrically, and a light combining device is arranged on the glued surface.
  • the first prism D and the second prism C are quadrangular, and each includes a first edge forming a bonding surface, a second edge not adjacent to the first edge, and The first edge and the third edge and the fourth edge of the second edge.
  • the third prism A, the fourth prism B, the fifth prism E, and the sixth prism F are all triangular prisms with a certain thickness in the direction perpendicular to the paper surface, and the first prism D is an example, the third prism A is attached to the second edge of the first prism D, and the fifth prism E is attached to the third edge of the first prism D; in the same way, the fourth prism The prism B is attached to the second edge of the second prism C, and the sixth prism F is attached to the third edge of the second prism C.
  • the third prism A and the fourth prism B are symmetrically arranged with respect to the bonding surface of the first prism D and the second prism C.
  • the third prism A is attached to the second edge of the first prism D, and the edge of the third prism A exceeds the second edge of the first prism D and is in line with the third edge of the first prism D.
  • a gap is formed between the fifth prism E, and the fifth prism E is connected to the third prism A and the first prism D.
  • the fourth prism B is attached Converge at the second edge of the second prism C, the edge of the fourth prism B exceeds the second edge of the second prism C and forms a gap with the third edge of the second prism C,
  • the sixth prism F is arranged in the gap, and the sixth prism F is connected to the fourth prism B and the second prism C respectively.
  • the third prism A and the fourth prism B are TIR prisms. After passing through the third prism A and the fourth prism B, the light enters the first spatial light modulator 106b and the second spatial light modulator 106a respectively, and passes through the first spatial light modulator 106b and the second spatial light modulator 106a. The light modulated by the spatial light modulator 106a enters the fifth prism E and the sixth prism F.
  • the non-image light enters the fifth prism E, it is totally reflected on the bonding surface of the fifth prism E and the first prism D and is emitted from the fifth prism E, and the non-image light enters the After the sixth prism F, it performs total reflection on the cemented surface of the sixth prism F and the second prism C and is emitted from the sixth prism F; the image light passes through the fifth prism E and the The sixth prism F enters the first prism D and the second prism C to combine light and enters the receiving device 107.
  • a plurality of reflecting mirrors 109 are provided between the third prism A and the fourth prism B and the beam splitting device 304, and a plurality of mirrors 109 are provided between the reflecting mirrors 109.
  • the lens on the convergent light path is used to realize the folding of the light path and the correction of the incident angle of the prism component 108.
  • two reflecting mirrors are provided on both sides of the prism assembly 108.
  • This embodiment is a combination of the second embodiment and the third embodiment. Compared with the third embodiment, this embodiment can transmit the illumination light to the spatial light modulation through the reflector 109 and the lens. On the surface of the device 106, the image light is combined inside the prism assembly 408, and finally enters the receiving device 107, that is, the projection lens, so as to ensure the clarity of the projected image, so that the modulated image light is transmitted in the glass medium. Compared with the traditional air transmission, the actual optical length is shortened, thereby reducing the back focus of the lens.
  • the prism assembly of the present invention can also be combined in other ways, for example, using 8 prisms for combination, and the principles are the same.
  • the present invention provides a light source system including: the light emitting device is used to emit the illumination light in time sequence; the light splitting device is arranged on the optical path of the illumination light, and the illumination light Divided into the first light transmitted along the first light channel and the second light transmitted along the second light channel; the prism assembly has the combined light provided on the glue surface along the direction of the symmetry axis Device; the first spatial light modulator and the second optical spatial modulator are respectively arranged on both sides of the symmetry axis of the prism assembly, receiving the first light and the second light to modulate the first One image light and the second image light, the first image light and the second image light respectively enter the prism assembly from both sides of the symmetry axis of the prism assembly, and are combined by the light combining device The light is emitted along the same channel.
  • the light source system and projection equipment of the present invention are designed to make the illumination light modulated into image light in the light source system and projection equipment of the present invention, so that the modulated image light is transmitted in the glass medium, compared with the traditional In the air transmission, the actual optical path is shortened, thereby reducing the back focus of the lens, and can achieve better uniformity, avoid the use of gradient coating, and have high structural precision, reducing the difficulty of optical path adjustment and production process. Good user experience.

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Abstract

一种光源系统包括:发光装置(101)，用于出射时序的照明光；分光器件(304)，设置在照明光光路上，将照明光分成沿第一光通道传输的第一光以及沿第二光通道传输的第二光；棱镜组件(108)，沿对称轴方向的胶合面上设置有合光器件；第一空间光调制器(106b)和第二空间光调制器(106a)，分别设置于棱镜组件(108)对称轴的两侧，接收第一光和第二光调制成第一图像光和第二图像光，第一图像光和第二图像光分别从棱镜组件(108)对称轴的两侧射入棱镜组件(108)，并经合光器件合光后沿同一通道射出。光源系统及投影设备通过光路的设计，通过棱镜组件(108)和分光器件(304)实现光路的分光和合光，可以保证分光合光的镀膜属性一致，降低了装配及工艺难度，具有良好的用户体验。

Description

光源系统及投影设备 技术领域
本发明涉及光学技术领域，特别是涉及一种光源系统及投影设备。
背景技术
在投影显示领域，通常使用的空间光调制器有DMD、LCD、LCOS，其中LCD属于透射式的偏振器件，也是最成熟光调制器，而其缺点则为散热性能差，开口率低、响应时间长等，很难在单片式上实现高亮度、彩色(时序三基色)投影显示，因此普遍使用的是三片式LCD投影技术。由于LCD调制只针对于偏振光，因此在光路中需要较多的偏振器件，光路结构复杂。DMD和LCOS属于反射式器件，不同的是DMD利用微镜单元的翻转在空间上区分输入的照明光及输出的图像光，LCOS则类似于LCD利用偏振特性区分照明光与图像光。反射式的调制器具有散射性能好、开口率高、调制速率高等优点。以DMD为例，普遍的家用、商务、教育等市场使用的是单片式投影系统，影院则使用三片式投影系统。单片式系统光机结构简单，光源则需要提供时序的照明光，经过SLM时序地调制图像光；三片式系统中，光源提供白光照明光，照明光经过光机空间分光后，入射到三片SLM上分别调制出RGB单色图像光，再经过合光器件合成彩色图像光。
相关技术的光源系统包括光源、方棒、中继镜、分光器件、TIR棱镜、空间光调制器以及投影镜头。所述光源则提供时序的照明光，该照明光按照顺序分别通过所述方棒、所述中继镜、所述分光器件、所述TIR棱镜、所述空间光调制器以及所述投影镜头。
然而，相关技术的光源系统的照明光经过所述方棒、所述中继镜以及所述分光器件的分光，再经过所述空间光调制器合光后进入到所述投 影镜头。上述的投影系统需要所述投影镜头的后截距很长，使得镜头的设计难度加大并且镜头的体积增大，镜头的成本及投影系统的体积增大。
另外，相关技术在采用激光荧光光源的单片式SLM系统中，蓝光照明光通常由蓝光激光提供，红光和绿光照明光则是由蓝激光激发荧光粉产生荧光，再经过滤光片修正颜色得到。例如，红光照明光通常由激光激发黄色荧光粉产生宽光谱的黄色荧光，滤光片则滤掉荧光中绿光波段的光，透过红光波段的荧光，因此在SLM调制红光图像的时刻，将损失较多的绿光，而绿光通常对亮度的贡献最大，因此单片式SLM投影系统的输出亮度有限。在双片式的SLM系统中，同时存在时序和空间的两种照明光合光方式；在第一时刻，光源输出蓝光照明光照射一片SLM，在第二时刻，光源输出黄光照明光在光机中进行分光，分为红光和绿光照明光分别照射两片SLM，红绿光没有时序分光的损失。
在双片式或三片式SLM系统中，利用分光、合光装置对照明光进行分光或合光是必要的，并且分光、合光装置是利用镀膜的方式实现波长分光。在实际中，照明光是由光源发出的很多光锥的集合，每束光锥都存在一定的光锥角度，而所述合光装置的镀膜是影响波长和入射角的函数的关键因素。光束以一定光锥入射镀膜装置时，光线的入射角度不同，光线透过的能量和光谱不同。现有技术的光路，合光分光的装置复杂，加工难度较大。
因此，实有必要提供一种新的光源系统以及投影设备以解决上述问题。
发明内容
本发明的目的是克服上述技术问题，提供一种可以保证分光合光的镀膜属性一致，降低了装配及工艺难度，具有良好的用户体验的光源系统及投影设备。
为了实现上述目的，本发明提供一种光源系统，所述光源系统包括:
发光装置，用于出射时序的照明光；
分光器件，设置在所述照明光光路上，用于将所述照明光分成沿第一光通道传输的第一光以及沿第二光通道传输的第二光；
棱镜组件，所述棱镜组件为多个棱镜胶合制成的对称结构，所述棱镜组件沿对称轴方向的胶合面上设置有合光器件；
第一空间光调制器和第二光空间调制器，分别设置于所述棱镜组件对称轴的两侧，所述第一空间光调制器接收所述第一光并将所述第一光调制成第一图像光，所述第二空间光调制器接收所述第二光并将所述第二光调制成第二图像光，所述第一图像光和所述第二图像光分别从所述棱镜组件对称轴的两侧射入所述棱镜组件，并经所述合光器件合光后沿同一通道射出。
优选的，所述光源系统还包括设置于所述发光装置与所述分光器件之间的匀光器件，所述匀光器件用于对发光装置出射的照明光进行均匀化处理，所述分光器件设置在所述匀光器件的光路的远心位置。
优选的，所述棱镜组件为4个棱镜或6个透镜胶合制成。
优选的，所述棱镜组件包括相胶合且对称设置的第一棱镜和第二棱镜，以及分别与所述第一棱镜和所述二棱镜胶合的第三棱镜和第四棱镜，所述第三棱镜和所述第四棱镜关于所述第一棱镜和所述第二棱镜的胶合面对称设置；从所述分光器件出射的第一光进入所述第三棱镜，经所述第三棱镜的与所述第一棱镜相胶合的侧面全反射后从所述第三棱镜射出并入射至第一空间光调制器，所述第一空间光调制器将接收的所述第一光调制成所述第一图像光，所述第一图像光穿过所述第三棱镜和所述第一棱镜入射至所述合光器件；从所述分光器件出射的所述第二光进入所述第四棱镜，经所述第四棱镜的与所述第二棱镜相胶合的侧面全反射后从所述第四棱镜射出并入射至所述第二空间光调制器，所述第二空间光调制器将接收的所述第二光调制成所述第二图像光，所述第二图像光穿过所述第四棱镜和所述第二棱镜入射至所述合光器件。
优选的，所述光源系统还包括设置于所述分光器件与所述第三棱镜之间的第一中继系统、设置于所述分光器件与所述第四棱镜之间的第二中继系统，所述第一中继系统用于将从所述分光器件出射的所述第一光 引导至所述第三棱镜；所述第二中继系统用于将从所述分光器件出射的所述第二光引导至所述第四棱镜。
优选的，所述棱镜组件包括相胶合且对称设置的第一棱镜和第二棱镜，与所述第一棱镜胶合的第三棱镜，与所述第二棱镜胶合的第四棱镜，与所述第一棱镜和所述第三棱镜胶合的第五棱镜，与所述第二棱镜和所述第四棱镜胶合的第六棱镜，所述第三棱镜和所述第四棱镜关于所述第一棱镜和所述第二棱镜的胶合面对称设置，所述第五棱镜和所述第六棱镜关于所述第一棱镜和所述第二棱镜的胶合面对称设置；从所述分光器件出射的所述第一光进入所述第五棱镜，经所述第五棱镜的与所述第一棱镜和第三棱镜相胶合的侧面全反射后从所述第五棱镜射出并入射至所述第一空间光调制器，所述第一空间光调制器将接收的所述第一光调制成所述第一图像光，所述第一图像光穿过所述第五棱镜、所述第三棱镜和所述第一棱镜入射至所述合光器件；从所述分光器件出射的所述第二光进入所述第六棱镜，经所述第六棱镜的与所述第二棱镜和第四棱镜相胶合的侧面全反射后从所述第六棱镜射出并入射至所述第二空间光调制器，所述第二空间光调制器将接收的所述第二光调制成所述第二图像光，所述第二图像光穿过所述第六棱镜、所述第四棱镜和所述第二棱镜入射至所述合光器件。
优选的，所述第一空间光调制器出射的第一图像光中混合有第一非图像光，所述第一非图像光经所述第三棱镜或/和所述第五棱镜的与所述第一棱镜相胶合的侧面全反射后从所述棱镜组件射出；所述第二空间光调制器出射的第二图像光中混合有第二非图像光，所述第二非图像光经所述第四棱镜或/和所述第六棱镜的与所述第二棱镜相胶合的侧面全反射后从所述棱镜组件射出。
优选的，所述的光源系统还包括设置于所述分光器件与所述第五棱镜之间的第三中继系统、设置于所述分光器件与所述第六棱镜之间的第四中继系统，所述第三中继系统用于将从所述分光器件出射的所述第一光引导至所述第五棱镜；所述第四中继系统用于将从所述分光器件出射的所述第二光引导至所述第六棱镜。
优选的，所述合光器件为分光膜。第二光空间调制器
本发明还提供一种投影设备，该投影设备包括上述任意一项的光源系统。
与相关技术相比，本发明提供一种光源系统包括:所述发光装置，用于出射时序的所述照明光；所述分光器件，设置在所述照明光的光路上，将所述照明光分成沿所述第一光通道传输的所述第一光以及沿所述第二光通道传输的所述第二光；所述棱镜组件，沿对称轴方向的胶合面上设置有所述合光器件；所述第一空间光调制器和所述第二光空间调制器，分别设置于所述棱镜组件对称轴的两侧，接收所述第一光和所述第二光调制成所述第一图像光和所述第二图像光，所述第一图像光和所述第二图像光分别从所述棱镜组件对称轴的两侧射入所述棱镜组件，并经所述合光器件合光后沿同一通道射出。本发明的光源系统及投影设备通过光路的设计，使所述照明光在本发明的光源系统及投影设备中调制成图像光，使得调制后的图像光在玻璃介质中传输，相比于传统的空气中传中，实际光程缩短，进而减小了镜头的后截距，而且能够实现较好的均匀性，避免了使用梯度镀膜，并且结构精度高，减少了光路调节和生产工艺难度，具有良好的用户体验。
附图说明
图1是本发明光源系统的第一种实施方式的结构示意图；
图2是本发明光源系统的第一种实施方式的一体式棱镜的结构示意图；
图3是本发明光源系统的第二种实施方式的结构示意图；
图4是本发明光源系统的第二种实施方式的一体式棱镜的结构示意图；
图5是本发明光源系统的第三种实施方式的结构示意图；
图6是本发明光源系统的第三种实施方式的一体式棱镜的结构示意图；
图7是本发明光源系统的第四种实施方式的结构示意图；
图8是本发明光源系统的第四种实施方式的一体式棱镜的结构示意 图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
本发明提供一种光源系统，包括光源、分光器件、空间光调制器、棱镜组件以及接收装置。其中，所述棱镜组件为多个棱镜胶合制成的对称结构，所述棱镜组件沿对称轴方向的胶合面上设置有合光器件，所述空间光调制器设置于所述棱镜组件的两侧，所述光源发射时序的照明光，所述分光器件将照明光分光并分别输出至两个所述空间光调制器，经两所述空间光调制器调制后的光经过所述棱镜组件合光，该合光进入所述接收装置，并由所述接收装置往外界输出。本发明还提供一种投影设备，包括所述的光源系统。具体以四个实施例来详细描述本发明：
实施例一
请参阅图1和图2所示，本发明提供的光源系统包括光源101、匀光器件102、中继系统103、分光器件304、空间光调制器106、棱镜组件108和接收装置107。
其中所述光源101可以为灯泡、LED光源、激光光源或者二次激发的荧光光源，但并不限于此。所述光源101出射时序的照明光，如蓝光与黄光时序的照明光、紫光与黄光时序的照明光等；所述接收装置107为投影镜头，用于接收出射的图像光；所述匀光器件102为方棒，用于将所述光源101射出的光束进行均匀化处理；所述分光器件304为分光镜片，设置在所述照明光光路上，用于将所述照明光分成沿第一光通道传输的第一光以及沿第二光通道传输的第二光，所述分光器件304利用镀膜的方式实现波长分光。
所述匀光器件102和所述中继系统103设置在所述分光器件304与 所述光源101之间，所述分光器件304设置在所述匀光器件102的光路的远心位置。所述分光器件304位于光路的远心位置，能够保证投影图像的照度及颜色均匀性。所述匀光器件102(即方棒)的出射面每个视场出射同样的光锥，并且主光轴相互平行，每个光锥经过所述分光器304时透过的能量和光谱一致。所述中继系统103包括至少两个透镜，所述透镜，用于将所述照明光会聚到所述分光器件304上。具体在本实施方式中，所述中继系统103包括两个所述透镜，分别为透镜103a和透镜103b。
所述棱镜组件108为多个棱镜胶合制成的对称结构，优选的，棱镜的数量为偶数倍，且沿轴对称在所述棱镜组件108的对称轴两侧分布排列。沿对称轴方向的胶合面上设置有合光器件(图未示)，所述合光器件利用镀膜的方式实现波长合光，所述合光器件沿所述对称轴的方向设置。具体在本实施方式中，所述合光器件为分光膜，也就是分光镀膜。
具体在本实施方式中，所述空间光调制器106共有两个，包括第一空间光调制器106b和第二空间光调制器106a，沿所述棱镜组件108的对称轴对称设置在所述棱镜组件108的两侧，第一空间光调制器106b接收所述第一光并将所述第一光调制成第一图像光，所述第二空间光调制器106a接收所述第二光并将所述第二光调制成第二图像光，所述第一图像光和所述第二图像光分别从所述棱镜组件108对称轴的两侧射入所述棱镜组件，并经所述棱镜组件108合光后进入所述接收装置107置内。其中，所述接收装置107为投影镜头。
需要说明的是，合光器件设置在对称结构的棱镜组件的胶合面上，棱镜组件以及第一空间光调制器106b、第二空间光调制器106a沿胶合面对称设置，此外，分光器件304于胶合面在同一平面内，也就是，分光器件304和合光器件在同一平面内。
本实施方式的所述棱镜组件108为4个棱镜胶合制成。如图2所示，共包括A、B、C、D四个棱镜。其中包括相胶合且对称设置的第一棱镜D和第二棱镜C，以及分别与所述第一棱镜D和所述二棱镜C胶合的第三棱镜A和第四棱镜B。其中所述第三棱镜A和所述第四棱镜B为TIR 棱镜，所述TIR棱镜为全内反射棱镜。所述第三棱镜A和所述第四棱镜B关于所述第一棱镜D和所述第二棱镜C的胶合面对称设置，所述合光器件(分光镀膜)位于所述第一棱镜D和所述二棱镜C的胶合面处。
从所述分光器件304出射的所述第一光进入所述第三棱镜A，经所述第三棱镜A的与所述第一棱镜D相胶合的侧面全反射后从所述第三棱镜射A出并入射至所述第一空间光调制器106a，所述第一空间光调制器106b将接收的所述第一光调制成所述第一图像光，所述第一图像光穿过所述第三棱镜A和所述第一棱镜D入射至所述合光器件；从所述分光器件304出射的所述第二光进入所述第四棱镜B，经所述第四棱镜B的与所述第二棱镜C相胶合的侧面全反射后从所述第四棱镜B射出并入射至所述第二空间光调制器106b，所述第二空间光调制器106a将接收的所述第二光调制成所述第二图像光，所述第二图像光穿过所述第四棱镜B和第二棱镜C入射至合光器件。
在本实施方式中，为了更好的实现合光功能，将所述第一棱镜D和所述第二棱镜C设计为多边形结构，所述第三棱镜A和所述第四棱镜B设计为三角形结构，并以所述第三棱镜A和所述第一棱镜D为例，所述第一棱镜D为不规则四边形结构，所述第三棱镜A贴设在所述第一棱镜D与第所述二棱镜C贴合面的相邻一个侧面上。同理，所述第四棱镜B贴设在所述第二棱镜C与所述第一棱镜D贴合面的相邻一个侧面上。
其中，所述第二空间光调制器106a位于所述第四棱镜B远离所述二棱镜C的一侧，而所述第一空间光调制器106b位于所述第三棱镜A远离所述第一棱镜D的一侧。
需要说明的是，各棱镜的胶合可以是整个侧面全部胶合，也可以是边缘区域胶合，如中间部分为空气隙的部分胶合。
该光源系统还包括设置于所述分光器件304与所述第三棱镜A之间的第一中继系统(图未示)、设置于所述分光器件304与所述第四棱镜B之间的第二中继系统(图未示)，所述第一中继系统用于将从所述分光器件304出射的所述第一光引导至所述第三棱镜；所述第二中继系统用于将从所述分光器件304出射的所述第二光引导至所述第四棱镜。
上述的四片棱镜胶合成的一体式的棱镜，所述合光器件(分光镀膜)位于所述第一棱镜D和所述第二棱镜C的胶合面处，使得调制后的图像光在玻璃介质中传输，相比于传统的空气中传中，实际光程缩短，进而减小了所述接收装置107(投影镜头)的后截距。此外，一体式棱镜保证了TIR棱镜(所述第三棱镜A和所述第四棱镜B)的定位精度，减少了光路调节和生产工艺难度。
实施例二
如图3和图4所示，为本发明的第二种实施方式，其为在第一种实施方式的基础上进行的改进，与第一种实施方式大致相同，所述光源系统包括光源101、匀光器件102、中继系统103、分光器件304、空间光调制器106棱镜组件208和接收装置107。其中所述光源101时序发出照明光，所述接收装置107为投影镜头，所述匀光器件102为方棒，所述分光器件304为分光镜片。所述棱镜组件208为4个棱镜胶合制成。共包括A、B、C、D四个棱镜。其中包括位于沿对称轴方向的胶合面两侧的第一棱镜D和二棱镜C和分别与所述第一棱镜D和所述二棱镜C相胶合的第三棱镜A和第四棱镜B。其中所述第三棱镜A和所述第四棱镜B为TIR棱镜。光线经过所述第三棱镜A和所述第四棱镜B后分别入射第一空间光调制器106b和第二空间光调制器106a，分别经所述第一空间光调制器106b和第二空间光调制器106a调制后的光分别经过所述第一棱镜D和所述第二棱镜C，在所述第一棱镜D和所述第二棱镜C的胶合面的所述合光器件上实现合光后进入所述接收装置107内。
区别仅在于，在本实施方式中，所述第一棱镜D和所述第二棱镜C为不规则的四边形结构，所述第三棱镜A和所述第四棱镜B为三角形结构，所述第三棱镜A和所述第四棱镜B关于所述第一棱镜D和所述第二棱镜C的胶合面对称设置。也就是说所述第三棱镜A贴设在所述第一棱镜D的所述第一棱镜D和所述第二棱镜C的贴合面的非相临边上；所述第四棱镜B贴设在所述第二棱镜C的所述第二棱镜C与所述第一棱镜D的贴合面的非相临边上。所述第一空间光调制器106b和第二空间光调 制器106a分别设置在所述第一棱镜D和二棱镜C远离所述第三棱镜A和第四棱镜B的一侧。
进一步的，在本实施方式中，所述第三棱镜A和所述第四棱镜B与所述分光器件304之间的设置有多个反射镜109以及设置在所述反射镜109之间的多个用于会聚光路的透镜，该透镜用于实现光路的折叠以及对所述棱镜组件108入射角的矫正。如图3所示，在本实施方式中，所述棱镜组件108的两侧各设置两个反射镜(即反射镜109a和反射镜109b)。
相较第一种实施方式，本实施方式可以通过所述反射镜109和所述透镜将照明光传导至所述空间光调制器106表面，所述图像光则在所述棱镜组件208内侧合光，最终进入所述接收装置107，也就是投影镜头，从而确保投影图像的清晰度。
实施例三
如图5和图6所示，为本发明的第三种实施方式，其为在前述实施方式的基础上进行的改进，与前述实施方式大致相同，光源系统包括光源101、匀光器件102、中继系统103、分光器件304、空间光调制器106棱镜组件308和接收装置107。其中所述光源101时序发出照明光，所述接收装置107为投影镜头，所述匀光器件102为方棒，所述分光器件304为分光镜片。区别仅在于，在本实施方式中，所述棱镜组件308为6个棱镜胶合制成对称结构，共包括A、B、C、D、E、F六个棱镜。其中包括位于对称面两侧的第一棱镜D和二棱镜C、第三棱镜A和第四棱镜B以及与第一棱镜D和第三棱镜A胶合的第五棱镜E，与第二棱镜C和第四棱镜B胶合的第六棱镜F。第一棱镜D和二棱镜C分别位于对称轴的两侧，所述第三棱镜A和所述第四棱镜B关于所述第一棱镜D和所述第二棱镜C的胶合面对称设置，所述第五棱镜E和所述第六棱镜F关于所述第一棱镜D和所述第二棱镜C的胶合面对称设置。其中，所述第一棱镜D和所述第二棱镜C均为四边形结构，包括形成贴合面的第一边缘、与第一边缘不邻接的第二边缘和连接第一边缘和第二边缘的第三边 缘和第四边缘。所述第三棱镜A、所述第四棱镜B、所述第五棱镜E和所述第六棱镜F均为垂直纸面的方向上具有一定厚度的三棱柱型的棱镜，以所述第一棱镜D为例，所述第三棱镜A贴设在所述第一棱镜D的所述第三边缘，并同时，所述第三棱镜A与所述第五棱镜E的一个边缘贴合；所述第五棱镜E贴设在所述第一棱镜D的所述第二边缘；同理，所述第四棱镜B贴设在所述第二棱镜C的第三边缘，并同时，所述第四棱镜B与所述第六棱镜F的一个边缘贴合；所述第六棱镜F贴设在第二棱镜C的第二边缘。所述第五棱镜E和所述第六棱镜F关于所述第一棱镜D和所述第二棱镜C的胶合面对称设置。所述第三棱镜A和所述第四棱镜B关于所述第一棱镜D和所述第二棱镜C的胶合面对称设置，所述第三棱镜A和所述第四棱镜B分别贴合在所述第一棱镜D的第三边缘上和所述第二棱镜C的第三边缘上，且所述第三棱镜A和所述第四棱镜B的边缘均超过与其贴合的所述第一棱镜D的第三边缘和所述第二棱镜C的第三边缘，并与对应的第三边缘之间形成间隙，所述第五棱镜E和所述第六棱镜F设置在该间隙内。其中所述第五棱镜E的两侧分别与所述第一棱镜D和所述第三棱镜A相连，所述第六棱镜F的两侧分别与所述第二棱镜C和所述第四棱镜B相连。
所述第三棱镜A和所述第四棱镜B为TIR棱镜。从所述分光器件304出射的所述第一光进入所述第三棱镜A，经所述第三棱镜A后，并从所述第三棱镜A和所述第五棱镜E的胶合面全反射后从所述第三棱镜A射出并入射至第一空间光调制器106b，所述第一空间光调制器106b将接收的所述第一光调制成第一图像光，所述第一图像光依次穿过所述第三棱镜A、所述第五棱镜E以及所述第一棱镜D入射至所述合光器件。从所述分光器件出射的所述第二光进入所述第二棱镜B，经所述第二棱镜B后，并从所述第二棱镜B和所述第六棱镜F胶合面全反射后从所述第二棱镜B射出并入射至第二空间光调制器106a，所述第二空间光调制器106a将接收的所述第二光调制成第二图像光，所述第二图像光依次穿过所述第二棱B、所述第六棱镜F以及所述第四棱镜C入射至所述合光器件。
所述第一空间光调制器106b出射的所述第一图像光中混合有第一非图像光，第一图像光与第一非图像光的出射角度不相同。所述第一非图像光依次经过所述第三棱镜A和所述第五棱镜E后，入射到所述第五棱镜E全反射面的角度满足全反射条件，因此，第一非图像光经第五棱镜E全反射后从所述第五棱镜E射出。所述第二空间光调制器106a出射的所述第二图像光中混合有第二非图像光，所述第二非图像光依次经过所述第四棱镜B和所述第六棱镜F后，并从所述第六棱镜F和所述第二棱镜C胶合面全反射后从所述第四棱镜射出。经光源系统形成的所述第一图像光和所述第二图像光分别经所述第五棱镜E和所述第六棱镜F进入所述第一棱镜D和二棱镜C合光并进入所述接收装置107，所述棱镜组件308这种一体式棱镜保证了第三棱镜A和第四棱镜B的定位精度，减少了光路调节和生产工艺难度。
本实施方式还包括设置于所述分光器件304与所述第五棱镜E之间的第三中继系统、设置于所述分光器件304与所述第六棱镜F之间的第四中继系统，所述第三中继系统用于将从所述分光器件出射的第一光引导至第五棱镜；所述第四中继系统用于将从所述分光器件出射的第二光引导至第六棱镜。
相较前述实施方式，本实施方式可以避免非图像光等杂光进入镜头干扰图像效果，提高了投影图像的对比度。
实施例四
如图7和图8所示，为本发明的第四种实施方式，其为在前述实施方式的基础上进行的改进，与前述实施方式大致相同，光源系统包括光源101、匀光器件102、中继系统103、分光器件304、空间光调制器106、棱镜组件408、接收装置107以及合光器件(图未示)。其中所述光源101时序发出照明光，所述接收装置107为投影镜头，所述匀光器件102为方棒，所述分光器件304为分光镜片。
所述棱镜组件408为6个棱镜胶合制成。所述棱镜组件408包括第一棱镜D和第二棱镜C、第三棱镜A和第四棱镜B以及第五棱镜E和第 六棱镜F。所述第一棱镜D和所述二棱镜C胶合且对称设置，其胶合面上设置有合光器件。其中，本实施方式中，所述第一棱镜D和所述第二棱镜C为四边形，分别包括形成贴合面的第一边缘、与所述第一边缘不邻接的第二边缘和连接所述第一边缘和所述第二边缘的第三边缘和第四边缘。所述第三棱镜A、所述第四棱镜B、所述第五棱镜E以及所述第六棱镜F均为垂直纸面的方向上具有一定厚度的三棱柱型的棱镜，以所述第一棱镜D为例，所述第三棱镜A贴设在所述第一棱镜D的第二边缘，所述第五棱镜E贴设在所述第一棱镜D的第三边缘；同理，所述第四棱镜B贴设在所述第二棱镜C的第二边缘，所述第六棱镜F贴设在所述第二棱镜C的第三边缘。在本实施方式中，所述第三棱镜A和所述第四棱镜B关于所述第一棱镜D和所述第二棱镜C的胶合面对称设置。所述第三棱镜A贴合于所述第一棱镜D的第二边缘，所述第三棱镜A的该边缘超过所述第一棱镜D的第二边缘并与所述第一棱镜D的第三边缘之间形成间隙，所述第五棱镜E设置在该间隙内，且所述第五棱镜E分别与所述第三棱镜A和所述第一棱镜D相连；同理，所述第四棱镜B贴合于所述第二棱镜C的第二边缘，所述第四棱镜B的该边缘超过所述第二棱镜C的第二边缘并与所述第二棱镜C的第三边缘之间形成间隙，所述第六棱镜F设置在该间隙内，且所述第六棱镜F分别与所述第四棱镜B和所述第二棱镜C相连。
所述第三棱镜A和所述第四棱镜B为TIR棱镜。光线分别经过所述第三棱镜A和所述第四棱镜B后，分别入射第一空间光调制器106b和第二空间光调制器106a，经所述第一空间光调制器106b和所述第二空间光调制器106a调制后的光进入所述第五棱镜E和所述第六棱镜F。其中，非图像光进入所述第五棱镜E后，在所述第五棱镜E和所述第一棱镜D胶合面进行全反射并从所述第五棱镜E中射出，非图像光进入所述第六棱镜F后，在所述第六棱镜F和所述第二棱镜C胶合面进行全反射并从所述第六棱镜F中射出；图像光经分别由所述第五棱镜E和所述第六棱镜F进入所述第一棱镜D和所述第二棱镜C合光并进入所述接收装置107。
进一步的，在本实施方式中，所述第三棱镜A和所述第四棱镜B与所述分光器件304之间设置有多个反射镜109以及设置在所述反射镜109之间的多个用于会聚光路的透镜，用于实现光路的折叠以及对所述棱镜组件108入射角的矫正。在本实施方式中，所述棱镜组件108的两侧各设置两个反射镜(反射镜109a和反射镜106b)。
本实施方式为第二种实施方式和第三种实施方式的结合，相较第三种实施方式，本实施方式可以通过所述反射镜109和所述透镜将照明光传导至所述空间光调制器106表面，图像光则在所述棱镜组件408内侧合光，最终进入所述接收装置107，也就是投影镜头，从而确保投影图像的清晰度，使得调制后的图像光在玻璃介质中传输，相比于传统的空气中传中，实际光程缩短，进而减小了镜头的后截距。
除上述列举是四种实施例以外，本发明的棱镜组件还可以为其他的组合方式，例如采用8个棱镜进行组合，其原理是相同的。
与相关技术相比，本发明提供一种光源系统包括:所述发光装置，用于出射时序的所述照明光；所述分光器件，设置在所述照明光的光路上，将所述照明光分成沿所述第一光通道传输的所述第一光以及沿所述第二光通道传输的所述第二光；所述棱镜组件，沿对称轴方向的胶合面上设置有所述合光器件；所述第一空间光调制器和所述第二光空间调制器，分别设置于所述棱镜组件对称轴的两侧，接收所述第一光和所述第二光调制成所述第一图像光和所述第二图像光，所述第一图像光和所述第二图像光分别从所述棱镜组件对称轴的两侧射入所述棱镜组件，并经所述合光器件合光后沿同一通道射出。本发明的光源系统及投影设备通过光路的设计，使所述照明光在本发明的光源系统及投影设备中调制成图像光，使得调制后的图像光在玻璃介质中传输，相比于传统的空气中传中，实际光程缩短，进而减小了镜头的后截距，而且能够实现较好的均匀性，避免了使用梯度镀膜，并且结构精度高，减少了光路调节和生产工艺难度，具有良好的用户体验。第二光空间调制器
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或 直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (10)

  1. 一种光源系统，其特征在于，所述光源系统包括:
    发光装置，用于出射时序的照明光；
    分光器件，设置在所述照明光光路上，用于将所述照明光分成沿第一光通道传输的第一光以及沿第二光通道传输的第二光；
    棱镜组件，所述棱镜组件为多个棱镜胶合制成的对称结构，所述棱镜组件沿对称轴方向的胶合面上设置有合光器件；
    第一空间光调制器和第二光空间调制器，分别设置于所述棱镜组件对称轴的两侧，所述第一空间光调制器接收所述第一光并将所述第一光调制成第一图像光，所述第二空间光调制器接收所述第二光并将所述第二光调制成第二图像光，所述第一图像光和所述第二图像光分别从所述棱镜组件对称轴的两侧射入所述棱镜组件，并经所述合光器件合光后沿同一通道射出。
  2. 根据权利要求1所述的光源系统，其特征在于，还包括设置于所述发光装置与所述分光器件之间的匀光器件，所述匀光器件用于对发光装置出射的照明光进行均匀化处理，所述分光器件设置在所述匀光器件的光路的远心位置。
  3. 根据权利要求1所述的光源系统，其特征在于，所述棱镜组件为4个棱镜或6个透镜胶合制成。
  4. 根据权利要求3所述的光源系统，其特征在于，所述棱镜组件包括相胶合且对称设置的第一棱镜和第二棱镜，以及分别与所述第一棱镜和所述二棱镜胶合的第三棱镜和第四棱镜，所述第三棱镜和所述第四棱镜关于所述第一棱镜和所述第二棱镜的胶合面对称设置；从所述分光器件出射的第一光进入所述第三棱镜，经所述第三棱镜的与所述第一棱镜相胶合的侧面全反射后从所述第三棱镜射出并入射至第一空间光调制器，所述第一空间光调制器将接收的所述第一光调制成所述第一图像光，所述第一图像光穿过所述第三棱镜和所述第一棱镜入射至所述合光器件；从所述分光器件出射的所述第二光进入所述第四棱镜，经所述第 四棱镜的与所述第二棱镜相胶合的侧面全反射后从所述第四棱镜射出并入射至所述第二空间光调制器，所述第二空间光调制器将接收的所述第二光调制成所述第二图像光，所述第二图像光穿过所述第四棱镜和所述第二棱镜入射至所述合光器件。
  5. 根据权利要求4所述的光源系统，其特征在于，所述光源系统还包括设置于所述分光器件与所述第三棱镜之间的第一中继系统、设置于所述分光器件与所述第四棱镜之间的第二中继系统，所述第一中继系统用于将从所述分光器件出射的所述第一光引导至所述第三棱镜；所述第二中继系统用于将从所述分光器件出射的所述第二光引导至所述第四棱镜。
  6. 根据权利要求3所述的光源系统，其特征在于，所述棱镜组件包括相胶合且对称设置的第一棱镜和第二棱镜，与所述第一棱镜胶合的第三棱镜，与所述第二棱镜胶合的第四棱镜，与所述第一棱镜和所述第三棱镜胶合的第五棱镜，与所述第二棱镜和所述第四棱镜胶合的第六棱镜，所述第三棱镜和所述第四棱镜关于所述第一棱镜和所述第二棱镜的胶合面对称设置，所述第五棱镜和所述第六棱镜关于所述第一棱镜和所述第二棱镜的胶合面对称设置；从所述分光器件出射的所述第一光进入所述第五棱镜，经所述第五棱镜的与所述第一棱镜和第三棱镜相胶合的侧面全反射后从所述第五棱镜射出并入射至所述第一空间光调制器，所述第一空间光调制器将接收的所述第一光调制成所述第一图像光，所述第一图像光穿过所述第五棱镜、所述第三棱镜和所述第一棱镜入射至所述合光器件；从所述分光器件出射的所述第二光进入所述第六棱镜，经所述第六棱镜的与所述第二棱镜和第四棱镜相胶合的侧面全反射后从所述第六棱镜射出并入射至所述第二空间光调制器，所述第二空间光调制器将接收的所述第二光调制成所述第二图像光，所述第二图像光穿过所述第六棱镜、所述第四棱镜和所述第二棱镜入射至所述合光器件。
  7. 根据权利要求6所述的光源系统，其特征在于，所述第一空间光调制器出射的第一图像光中混合有第一非图像光，所述第一非图像光经所述第三棱镜或/和所述第五棱镜的与所述第一棱镜相胶合的侧面全反 射后从所述棱镜组件射出；所述第二空间光调制器出射的第二图像光中混合有第二非图像光，所述第二非图像光经所述第四棱镜或/和所述第六棱镜的与所述第二棱镜相胶合的侧面全反射后从所述棱镜组件射出。
  8. 根据权利要求6或7所述的光源系统，其特征在于，所述的光源系统还包括设置于所述分光器件与所述第五棱镜之间的第三中继系统、设置于所述分光器件与所述第六棱镜之间的第四中继系统，所述第三中继系统用于将从所述分光器件出射的所述第一光引导至所述第五棱镜；所述第四中继系统用于将从所述分光器件出射的所述第二光引导至所述第六棱镜。
  9. 根据权利要求1所述的光源系统，其特征在于，所述合光器件为分光膜。
  10. 一种投影设备，其特征在于，包括如权利要求1到9任意一项所述的光源系统。
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