WO2018028240A1 - 光源***及投影设备 - Google Patents

光源***及投影设备 Download PDF

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Publication number
WO2018028240A1
WO2018028240A1 PCT/CN2017/081490 CN2017081490W WO2018028240A1 WO 2018028240 A1 WO2018028240 A1 WO 2018028240A1 CN 2017081490 W CN2017081490 W CN 2017081490W WO 2018028240 A1 WO2018028240 A1 WO 2018028240A1
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WO
WIPO (PCT)
Prior art keywords
light
laser
light source
supplemental
source system
Prior art date
Application number
PCT/CN2017/081490
Other languages
English (en)
French (fr)
Inventor
胡飞
郭祖强
李屹
Original Assignee
深圳市光峰光电技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市光峰光电技术有限公司 filed Critical 深圳市光峰光电技术有限公司
Priority to US16/324,081 priority Critical patent/US11048157B2/en
Priority to JP2019506692A priority patent/JP6811306B2/ja
Priority to EP17838372.5A priority patent/EP3499309A4/en
Publication of WO2018028240A1 publication Critical patent/WO2018028240A1/zh
Priority to US17/336,076 priority patent/US20210286246A1/en

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Classifications

    • 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
    • G03B21/206—Control of light source other than position or intensity
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/007—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light
    • G02B26/008—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light in the form of devices for effecting sequential colour changes, e.g. colour wheels
    • 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
    • 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
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2013—Plural light sources
    • 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
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • 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
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
    • 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
    • G03B21/2066—Reflectors in illumination beam
    • 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
    • G03B21/2073—Polarisers in the lamp house
    • 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
    • G03B33/00—Colour photography, other than mere exposure or projection of a colour film
    • G03B33/08—Sequential recording or projection

Definitions

  • the present invention relates to the field of optical technology, and more particularly to a light source system and a projection apparatus.
  • solid-state light sources have been widely used in general illumination, special illumination and projection display due to their long life and environmental protection.
  • white light solid-state light source has great development potential in the field of lighting.
  • the prior art provides a white light source that uses a laser to excite a phosphor to achieve ultra-high brightness.
  • the white light source uses a blue-violet laser of 440 nm to 455 nm to excite a yellow phosphor of YAG:Ce material to generate high-efficiency yellow fluorescence.
  • a blue laser having a wavelength of 440 nm to 470 nm is used to form a blue laser complementary to the yellow fluorescence, and the yellow fluorescent light and the blue laser are combined to form a white light source.
  • This white light source can be used in the field of projection display where a high brightness light source is required.
  • a high brightness light source For example, single-chip, two-chip, three-chip DLP, LCD or LCOS projectors.
  • the white light emitted by the white light source is spectrally divided into three primary colors of red light, green light and blue light, which are respectively incident on one or more light modulation devices, such as DMD, LCD chips or LCOS chips.
  • the three primary colors of red, green and blue modulated by the light modulation device are spectrally combined and output to a screen through a projection lens to form a color image.
  • the phosphor of YAG:Ce material Due to the high efficiency of the blue-violet laser, thermal stability and long-term reliability are good.
  • the phosphor of YAG:Ce material has high luminescence quantum efficiency and good thermal stability, so the combination of blue-violet laser and YAG:Ce phosphor forms a high-efficiency, high-reliability, and high-brightness white light source. That is to say, for two-piece and three-piece projectors, a combination of a blue-violet laser and a yellow phosphor is generally used to realize a white light source.
  • the prior art provides a filter for the excess green light component in the synthesized white light, so that the white balance point is restored to the Planck black body curve to solve the white balance. problem.
  • this method reduces the light extraction efficiency of the white light source by filtering the green light component.
  • the prior art provides another method for adding a red laser in yellow fluorescent or red fluorescent light to solve the white balance problem of a white light source, such as supplementing a laser having a spectral range of around 638 nm or 650 nm in yellow fluorescence to increase the combined light.
  • the red component thus solves the white balance problem.
  • the light source system includes a blue excitation light source 11, a red supplemental light source 12, a spectral filter 13 having a central region and an edge region, a color wheel 14, a collecting lens 15, and a light homogenizing device 16.
  • the central region of the spectral filter 13 transmits blue light and red light, reflects green light, and reflects red, green, and blue light in the edge region.
  • the blue excitation light emitted by the blue laser light source 11 and the red light emitted from the red supplemental light source 12 are transmitted to the color wheel 14 through the central region of the spectral filter 13, and the yellow phosphor on the color wheel 14 absorbs the blue excitation light.
  • the red light is scattered, the yellow fluorescence and the scattered red light are emitted, and the yellow fluorescence and the scattered red light are incident on the spectroscopic filter 13 through the collecting lens 15, and the yellow light is incident on the central portion of the spectroscopic filter 13.
  • the green light in the fluorescence is reflected to the light homogenizing device 16, and the yellow fluorescent light and the red light incident to the edge region of the spectral filter 13 are also reflected to the light homogenizing device 16 and incident on the central region of the spectral filter 13
  • the red light in the yellow fluorescence and the scattered red light are transmitted and lost.
  • the red light emitted by the red supplemental light source is lost by the scattering of the fluorescent material, and the loss is roughly 5% to 10%.
  • the Lambertian light distribution is formed, it is collected by the collecting lens to cause loss, and the loss is about 10%.
  • the central region of the spectroscopic filter is transmitted to lose a part of the light, and the loss is about 10%, which causes the red light to be supplemented by the red complementary light source.
  • red light utilization rate of red light is relatively low, about 60-70%, and the red complementary light source has higher cost, and has higher requirements for heat dissipation, requiring harsh heat dissipation conditions, so red light utilization rate Low will lead to a large increase in cost, which is unfavorable.
  • a method of adding a green laser to the light source will be adopted. Similar to the above method of increasing the red laser, there is also a utilization rate. Low problem.
  • the blue, green, and red segments of the blue-violet laser excitation timing are generally used to generate time-series red, green, and blue light to form white light.
  • the blue light is provided by the blue-violet laser itself, and the green light is excited by the blue-violet laser.
  • the green phosphor is produced, the red segment is a blue-violet laser to excite the red phosphor, and the red phosphor has a severe efficiency degradation problem at a higher energy density, resulting in a low red light ratio, affecting white balance and image quality.
  • the method of increasing the red color segment is generally used to maintain the white balance, but this reduces the white light brightness and the overall light effect.
  • the present invention provides a light source system and a projection apparatus to solve the problem of low light utilization efficiency of red light or other color light emitted by a complementary light source including a red supplementary light source in the prior art.
  • a light source system including an excitation light source, a first supplemental light source, a first light guiding component, a wavelength conversion device, and a second light guiding component, wherein: the excitation light source For emitting excitation light; the first supplemental light source is for emitting the first supplemental light.
  • the first light guiding component is for directing the excitation light to the wavelength conversion device; the wavelength conversion device is for converting the excitation light into a laser light and emitting the laser light to the first light guiding component.
  • the first light guiding assembly is further configured to direct the laser light such that the laser light is directed toward the second light guiding assembly; at least a portion of the second light guiding assembly is disposed on the optical path after the laser light exits the first light guiding assembly.
  • the second light directing assembly is configured to direct at least a portion of the laser and the first supplemental light such that the first supplemental light and at least a portion of the laser are exiting from the same exit channel.
  • the first light guiding component comprises a beam splitting component and a light reflecting component
  • the light splitting component transmits/reflects the excitation light and is correspondingly reflected/transmitted at least partially by the laser light
  • the light reflecting component further guides at least part of the laser light to the second light guiding component.
  • the second light guiding component includes a selective optical component that reflects/transmits the first supplemental light, or reflects/transmits the first supplemental light and correspondingly transmits/reflects at least a portion of the laser light.
  • the selective optical component is a filter that reflects the first supplemental light and transmits at least a portion of the laser light, or is a reflective sheet or a polarizer that reflects the first supplemental light and is not at least partially reflected by the laser, or is set in a region
  • the filter of the polarizer is coated or aread.
  • the second light guiding assembly further includes a scattering member or/and a light concentrating member disposed between the first supplemental light source and the selective optical member.
  • the second light guiding assembly further includes a second concentrating lens for concentrating the first complementary light of the scattering component or/and the light concentrating component to the selective optical component, and the first supplement The focus of the light will be on the selective optics.
  • the light source system further includes a filter device located between the first light guiding component and the second light guiding component or on the same exit channel.
  • the wavelength conversion device is a reflective color wheel
  • the filter device is a filter wheel
  • the filter wheel is disposed on the outer circumference or the inner circumference of the reflective color wheel to be integrated with each other.
  • the second light guiding component is located between the first light guiding component and the filter wheel or downstream of the optical path of the light emerging from the filter wheel.
  • the wavelength conversion device is a transmissive color wheel
  • the filter device is a filter wheel
  • the filter wheel is disposed separately from the transmissive color wheel
  • at least part of the second light guiding component is located at the filter wheel and the transmissive color In the gap between the wheels.
  • the filter wheel is parallel or coincident with the respective axes of rotation of the transmissive color wheel.
  • the light source system further includes a light homogenizing device, the light homogenizing device being located on the same exit channel.
  • the light source system further includes a filter device and a light homogenizing device, the filter device is located between two components of the first light guiding component, and the light homogenizing device is located on the exit channel after the laser light passes through the filtering device, first The supplemental light source and the second light guiding component are disposed on the exit channel after the laser passes through the light homogenizing device.
  • the excitation light is blue light, violet light or ultraviolet light.
  • the first supplemental light is one or more of red light, green light or blue light.
  • the first supplemental light source comprises two, the two first supplemental light sources respectively emit the first supplemental light of red light and green light, and the second light guiding component further comprises a light splitting component, the red light and the green light pass through the light splitting component Exit to selective optics.
  • the wavelength conversion device comprises a wavelength conversion material, and the wavelength conversion material is a yellow phosphor.
  • the amount of optical expansion of the first supplemental light is smaller than the amount of optical expansion of the laser.
  • the present invention provides a projection apparatus including the above-described light source system.
  • the invention can increase the proportion of the first supplemental light in the combined light by supplementing the first supplemental light in the laser, and at the same time, since at least part of the laser light is directly emitted from the same exit channel through the second optical guiding component, A supplemental light is not scattered by the wavelength conversion device, thereby avoiding light loss caused by scattering of the first supplemental light by the wavelength conversion device, and greatly improving the light utilization efficiency of the first supplemental light.
  • FIG. 1 is a schematic structural view of a light source system provided by the prior art
  • FIG. 2 is a schematic structural diagram of a light source system according to a first embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a light source system according to a second embodiment of the present invention.
  • FIG. 4 is a schematic diagram showing the relationship between the reflectance of the coating film of the selective optical component and the spectrum of the first complementary light and the received laser light in the embodiment shown in FIG. 3;
  • FIG. 5 is a schematic diagram showing the correspondence between the transmittance of the coating film of the selective optical component and the spectrum of the first complementary light and the received laser light according to still another embodiment of the second embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of a light source system according to a third embodiment of the present invention.
  • FIG. 7 is a schematic diagram showing a correspondence relationship between light transmittance of a plating film of a selective optical component and a spectrum of a first complementary light and a laser beam according to still another embodiment of the 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 source system according to a fifth embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a light source system according to a sixth embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of a light source system according to a seventh embodiment of the present invention.
  • the present invention provides a light source system comprising at least two light sources, a wavelength conversion device, a first light guiding assembly and a second light guiding assembly. At least two of the light sources include an excitation light source and a first supplemental light source, wherein: the excitation light source is for emitting excitation light, and the first supplemental light source emits the first supplemental light.
  • the first light guiding component is configured to direct the excitation light emitted by the excitation light source to the wavelength conversion device.
  • the excitation light is converted into a laser light by the wavelength conversion device, and the laser light is emitted to the first light guiding component, and the first light guiding component is further configured to guide the laser light to the second light guiding component.
  • the amount of optical expansion of the first supplemental light is less than the amount of optical expansion of the laser.
  • the second light directing assembly is configured to direct at least a portion of the laser and the first supplemental light such that the first supplemental light and at least a portion of the laser are exiting from the same exit channel.
  • the structural size of the selective optical component included in the second light guiding component may be based on the amount of light loss when the excitation light passes through the selective optical component, the amount of light loss when the first supplemental light passes through the selective optical component,
  • the laser is set by one or a combination of the amount of light loss when the optical component is selectively used.
  • the present invention also provides a projection apparatus comprising the light source system as described above.
  • the light source system provided by the present invention comprises at least two light sources, the at least two light sources comprising an excitation light source and a first supplemental light source, and the excitation light emitted by the excitation light source is guided to the wavelength conversion device through the first light guiding component, through wavelength conversion
  • the device can see that the excitation light is converted into a laser light, and the laser light is guided to the second light guiding component through the first light guiding component, the first complementary light source emits an optical expansion amount smaller than the optical expansion amount of the laser light, and the first supplementary light passes through the second light.
  • the guiding assembly is combined with at least part of the laser light and further guided to the same exit channel, so that by supplementing the first supplemental light in the laser, the proportion of the first supplemental light in the combined light can be increased, and at the same time
  • a light homogenizing device or a light homogenizing device and a filtering device may be disposed on the exit channel, and the second light guiding component may directly guide the first supplemental light to the homogenizing device or guide the first supplemental light to the homogenizing device through the filtering device.
  • Light loss for example, greatly improves the light utilization efficiency of the first supplemental light red light, red light utilization efficiency can be increased to about 80% or more.
  • the present embodiment provides a light source system 20, as shown in FIG. 2, the light source system 20 includes two light sources, respectively an excitation light source 21 and a first supplemental light source 22, and further includes a first light guiding component 23 and wavelength conversion. Device 24, second light guiding assembly 25.
  • the wavelength conversion device is a reflective color wheel 24 (such as a wavelength conversion layer directly coated on a reflective substrate).
  • the wavelength conversion device may also be a transmissive wavelength conversion device (eg, A transparent substrate and a wavelength conversion material doped inside the transparent substrate are included.
  • wavelength conversion materials include, but are not limited to, phosphors, quantum dot materials, and the like.
  • the wavelength conversion layer is a wavelength conversion material layer or a film obtained by sintering a wavelength conversion material and an adhesive.
  • the wavelength converting material may be a yellow phosphor, a yellow-green phosphor, a green phosphor or the like.
  • the first light guiding component 23 includes a spectroscopic member such as a total reflection sheet 231 which is provided with a plating film, and a reflecting member such as a mirror 232, as the total reflection sheet 231 and the mirror 232.
  • the total reflection sheet 231 and the mirror 232 are disposed at different 45[deg.] angles with respect to the horizontal plane.
  • the total reflection sheet 231 is provided with a plating film corresponding to the incident light incident region to transmit the excitation light and to reflect the laser light, and other regions are set to reflect the laser light, the excitation light, or both.
  • an annular filter wheel may be disposed on the outer circumference or the inner circumference of the circular color wheel, that is, the reflective color wheel.
  • the reflective color wheel and the filter wheel of the integrated structure are provided with an annular filter wheel disposed on the outer circumference of the circular color wheel.
  • the type and partition of the wavelength converting material on the reflective or transmissive color wheel, and the corresponding integrated or split type (described further below), the type and partition of the filter of the filter wheel may be determined according to the actual situation. And the color wheel and the partition of the filter wheel are matched to each other.
  • the first light guiding component 23 may also be included between the total reflection sheet 231 and the reflective color wheel 24, between the total reflection sheet 231 and the mirror 232, the mirror 232 and the filter.
  • a first collecting lens 233 disposed between the light wheels 26 and between the filter wheel 26 and the second light guiding assembly 25, and the first collecting lens 233 may be a convex lens, a concave lens or a combination of the two, etc., and the first The number of the condenser lenses 233 can be determined according to actual needs.
  • the excitation light source 21 and the first supplemental light source 22 are used to emit excitation light and first complementary light, respectively.
  • the excitation light source 21 and the first supplemental source 22 each comprise a solid state lighting assembly that is a single solid state lighting device or a solid state lighting device array that includes a plurality of solid state lighting devices.
  • the solid state light emitting device may be a laser diode (LD) or a light emitting diode (LED).
  • the excitation light is blue light, violet light, or ultraviolet light.
  • the spectral range of the first supplemental light is different from the spectral range of the excitation light, and the spectral range of the first complementary light is narrower than the spectral range of the laser to increase the color saturation of the combined light of the laser and the first complementary light.
  • the amount of optical expansion of the first supplemental light is less than the amount of optical expansion of the laser.
  • the color of the first supplemental light emitted by the first supplemental light source 22 may be set according to different requirements for receiving the laser light, such as when the light is missing or insufficient in a certain color in the laser, then the first complementary light That is, the light of the color, such as the first supplemental light, may be one or more of red light, green light, blue light, etc., preferably, the color of the first supplementary light is different from the above-mentioned laser light lacking or insufficient. A certain color of light is consistent.
  • the first supplemental light is, for example, a laser light emitted by a solid-state light source
  • the laser light is, for example, a fluorescence generated by excitation of a wavelength conversion material. Since the spectrum of the laser and the fluorescence overlap, the Both are optically extended to combine light for better image quality and higher fill efficiency.
  • the second light guiding component 25 includes a selective optical component 251.
  • the second light guiding component 25 further includes a first supplemental light source 22 and an optional optical component 251.
  • a diffusing sheet 252 that can serve as a scattering member and a fly-eye lens pair 253 that can serve as a light-shaping member, wherein the diffusing sheet 252 can perform decoherent processing on the first supplemental light emitted by the solid-state light-emitting assembly included in the first supplemental light source 22,
  • the scattering sheet 252 may be a rotating diffusing sheet, a vibrating diffusing sheet, or the like.
  • the second condensing lens 254 is disposed between the pair of fly-eye lenses and the selective optical member 251, so that the multiplexed lens can converge the first supplemental light after the concentrating to the selective optical component 251, preferably.
  • the mutual position of the second collecting lens 254 and the selective optical member 251 is set such that the focus of the first complementary light is on the selective optical member 251, since the focus of the first complementary light is on the selective optical member 251.
  • the selective optical component 251 reflects the first supplemental light to the exit channel, thereby reducing the area on the selective optical component 251 for reflecting the first supplemental light, and correspondingly, reducing the spectral range of the first supplemental light
  • the light loss caused by the laser or the partial light containing the near-spectral range is reflected by the laser light passing through the area, thereby improving the light utilization efficiency.
  • the first light guiding component may further include a square bar (not shown) that can serve as a light homogenizing device, the square bar being disposed between the filter wheel 26 and the second light guiding component 25, and a first collecting lens 233 and Between the filter wheels 26.
  • the selective optical component reflects the first supplemental light or reflects the first supplemental light and transmits at least a portion of the laser.
  • the selective optical component is a filter comprising a central diaphragm and an edge diaphragm, wherein the central diaphragm is smaller in size than the edge diaphragm.
  • the central diaphragm and the edge diaphragm may be integral diaphragms or separate diaphragms.
  • the size of the center diaphragm may be one according to the amount of light loss when the first supplemental light passes through the center diaphragm, the amount of light loss when the excitation light passes through the center diaphragm, or the amount of light loss when the laser passes through the center diaphragm. Various combinations are set.
  • the selective optical component is a separate reflective sheet or polarizing plate, or the selective optical component comprises a reflective sheet or a polarizing plate and a fixing member for fixing the reflective sheet or the polarizing sheet (not shown)
  • a plating film is disposed on the reflective sheet or the polarizing plate such that the reflective sheet or the polarizing plate reflects the first complementary light, at least partially transmitted by the laser light without being reflected by the reflective sheet, preferably, the size of the reflective sheet and the polarizing sheet
  • the spot that is incident on one of the first supplemental lights is matched, that is, the entire area of the reflective sheet or the polarizing plate is coated, so that the adverse effect of the reflecting sheet or the polarizing plate on, for example, reflection of the laser light can be reduced.
  • the reflective sheet may not include a plating film, and the portion of the laser light incident on the reflective sheet may be totally reflected by the laser light and may not be transmitted, thereby causing a large loss of light to the laser portion, but relative to the reflective sheet.
  • the selective optical component is a filter, and the filter is provided with a first plating film or a polarizing plate in a central region, and a coating film is disposed on a central region of the filter.
  • One side of the area reflects the first supplemental light, and the other side transmits the laser light or is partially received by the laser but is reflected by the light in the laser that is close to the spectral range of the first complementary color to cause a certain loss.
  • the edge region of the filter is transmitted by the laser, and the polarizer is a polarizer for the first supplemental light, that is, the first complementary light reflection of the polarizer has a first polarization state.
  • the first supplemental light emitted by the first complementary light source 22 can be controlled to have substantially one a light of a polarization state, such as a P state.
  • the polarizing plate reflects the first complementary light having a P polarization state while transmitting a portion of the laser light having the S polarization state by a laser, for example,
  • the fluorescence received by the laser includes light of two polarization states, P state and S state. Therefore, by providing a polarizing plate corresponding to the first complementary light incident region of the filter, the polarization state of the laser can be guided to be different from the first complementary light.
  • the light and the first supplemental light are emitted from the same exit channel, and therefore, only the light of the P-polarized state of the light passing through the polarizing plate region is reflected and lost, thereby reducing the polarization of the laser light. Losses, more efficient use of converted light.
  • the selective optical component is provided with a second coated wavelength filter for the central region, the second coating having different filter curves for light of different polarization states, for example, for the first complementary light.
  • the second coating film can be reflected as the first complementary light of the P-polarized red light, and transmitted.
  • the red light in the P and S polarization states of the laser, the blue light in the P and S polarization states, and the red light in the S polarization state are red light that is only reflected by the second coating film and is lost by the second coating film.
  • a polarizing plate is disposed in a central region of the filter, and the polarizing plate allows only one of two polarization states of light included in each light to be transmitted.
  • the second coating may allow a portion of the light to be included in the light. Both polarization states of light are transmitted, so that the loss of the laser through the second coating can be further reduced.
  • the central film of each of the filters of the above various embodiments, the first plating film provided in the central region, the area of the polarizing plate in the central region, or the area of the second plating film disposed in the central region of the wavelength filter are smaller than 50% of the useful spot area.
  • the useful spot area refers to the area of the spot formed by the wavelength conversion device by the laser light formed on the entire filter.
  • the above description of the position of the center and the center area is not essential, and the position can be adjusted according to actual needs.
  • the above describes the case where the selective optical component reflects the first supplemental light or reflects the first supplemental light and transmits at least part of the received laser light, but according to the needs of the optical path design, the optical component arrangement, etc., The adjustment is made by referring to any of the selective optical components described above such that the selective optical component transmits the first supplemental light or transmits the first supplemental light and reflects at least a portion of the received laser light.
  • the light source system provided by the embodiment of the present invention will be described below with reference to FIG. 2 in a specific example. It is assumed that the excitation light emitted by the excitation light source 21 is the blue excitation light B, and the first complementary light emitted by the first supplementary light source 22 is the red light R. Alternatively, the first complementary light may also be green light, or A supplemental light can include red and green light.
  • the wavelength conversion device is a reflective wavelength conversion device, and the wavelength conversion material is a yellow phosphor.
  • the optical path principle of the light source system 20 is as follows: the blue excitation light B passes through the region-provided total reflection sheet 231 and the first condensing lens.
  • the filter 251 of the polarizing plate 251A is provided in the central region of the component.
  • the light of the yellow received laser light Y emitted to the polarizing plate 251A which is different from the polarization state of the first complementary light is transmitted and the light having the same polarization state as that of the first complementary light is reflected by the polarizing plate 251A to be lost, thereby reducing
  • the light reflected by the polarizing plate in the laser light different from the polarization state of the first complementary light improves the utilization of the laser light.
  • the yellow laser light Y that is emitted to the region other than the polarizing plate 251A of the filter 251 is transmitted.
  • the red light R emitted from the first supplemental light source 22 is de-coherent processed by the diffusion sheet 252 and is homogenized by the fly-eye lens pair 253 to be concentrated to the polarizing plate 251A and reflected to the exit channel.
  • the red light R can be supplemented by the laser light, and the red light R of the first complementary light and the red light receiving laser can be optically expanded by the polarizing plate 251A. Since the red light R is not directly scattered by the wavelength conversion device, it is directly guided to the exit channel through the polarizing plate 251A, thereby reducing the light loss of the red light R and improving the light utilization efficiency of the red light R. It can be seen that the red light R and the yellow light-receiving light Y can be incident on the light modulation device through the same exit channel, such as a one-piece or three-chip DMD light modulation device.
  • the excitation light emitted by the excitation light source is guided to the wavelength conversion device by the first light guiding component, and the laser light emitted from the wavelength conversion device is guided to the filter device and then directed to the second light guiding component, and
  • the first supplemental light emitted by the first supplemental light source is guided by the second light guiding component to be combined with the laser light incident on the second light guiding component and injected into the exit channel. Since the first complementary light is not scattered by the wavelength conversion device, Thereby, the light loss of the first supplemental light is greatly reduced, and the fill light efficiency of the first supplemental light is improved.
  • This embodiment provides another light source system 30.
  • the main difference between the light source system 30 and the light source system 20 shown in FIG. 2 is the arrangement of the second light guiding assembly 35, specifically, the second.
  • the light guiding member 35 is not provided with a scattering member and a light-shaping member between the selective optical member 351 and the first supplemental light source 32, and further, the first complementary light and the same exit channel that is emitted by the laser light, compared to the embodiment 1.
  • a light homogenizing device 37 is disposed thereon.
  • the above-mentioned light source system 30 provided by the embodiment is described below with a specific example.
  • the excitation light emitted by the excitation light source 31 is the blue excitation light B
  • the first complementary light emitted by the first supplementary light source 32 is the red light R.
  • the wavelength conversion device is a reflective color wheel 34, and the wavelength conversion material is excited by the excitation light to generate one or more kinds of laser light of blue B, green G, and red R, which may be according to the light modulation device.
  • the laser light is emitted from the reflective color wheel 34 and incident on the filter wheel 36 by the guidance of the first light guiding member 33, and the laser light emitted from the filter wheel 36 is further directed toward the second light guiding unit.
  • the selective optical member 351 of 35 is emitted together with the red light R, which can be the first supplemental light, to the fly-eye lens pair 37 which can function as a light homogenizing means.
  • the first supplemental light source 32 uses a red laser array that emits a red laser light R
  • the excitation light source 31 uses a blue laser array that emits a blue laser B, which emits a reflective color wheel 34.
  • the fluorescent material capable of functioning as a wavelength converting material generates the fluorescent light of one or more of the above, and the red laser light R and the red fluorescent light adopt a method of expanding the combined light at the coating of the selective optical member 351, see FIG. 4, and FIG.
  • the spectrum RP of the red laser spectrum RL and the red fluorescence and the reflectance curve CR of the coating of the selective optical member 351 are shown. Since the wavelength range of the spectrum of the red laser is narrow, the wavelength range of the red fluorescence spectrum is wide, for Within a certain range of the peak wavelengths of the red laser spectrum RL and the red fluorescence spectrum RP, the wavelength range corresponding to the partial red fluorescence spectrum RP1 (shown by the bold curve in FIG. 4) and the reflectance curve CR and the reflectance curve CR The wavelength ranges all have overlapping portions. It can be seen that the coating film inevitably reflects red laser light having multiple overlapping wavelengths while reflecting the red laser light, thereby causing red fluorescence.
  • the red laser occupies a small area of the center of the fly-eye lens pair 37, and the fluorescence of one or more of the above-mentioned blue B, green G, and red R occupies the remaining area, and finally images onto the light modulation device, the red laser and Fluorescence can form a spot with good uniformity, and the spot is finally formed by the projection lens to be observed by the human eye. Therefore, the complex eye lens is utilized to align the light to form a good surface distribution, thereby saving Optical components such as scattering members and light-shaping members can be used to reduce the cost while still ensuring that the emitted light is within an acceptable range.
  • Optical components such as scattering members and light-shaping members can be used to reduce the cost while still ensuring that the emitted light is within an acceptable range.
  • the selective optical member 351 can be further modified to have the above-described selective optical member 351 having the plating film having the characteristics shown in FIG. Polarization characteristics, such as a possible improvement, improved selective optics can be obtained by providing a coating on the polarizer, and the improved selective optic has the reflectivity and transmission shown in Figures 4 and 5 above. Rate characteristics.
  • the improved selective optical component reflects the S-polarized red light R, and In addition to the S-polarized light reflection in the red fluorescence corresponding to the red laser R spectrum range, the red fluorescence outside the above-mentioned substantially the same wavelength range has two polarizations, the P state and the S state.
  • the light of the state can be transmitted through the modified selective optical component 351, so that the red laser light R can have a very high light-filling efficiency while greatly reducing the loss of red fluorescence, and therefore, by the above, through the improvement
  • the selective optical member 351 can achieve a combined amount of light combining and polarization combining light for the red laser and the red fluorescent light incident thereon.
  • This embodiment provides another light source system 40.
  • the main difference between the light source system 40 and the light source system 30 shown in FIG. 3 is that a first supplemental light source 42' is added.
  • the first supplemental light source 42 and the first supplemental light source 42' are disposed on the same side of the selective optical component 451, the first supplemental light source 42'
  • the first supplemental light source 42 is located on both sides of the light splitting element 455 included in the second light guiding component 45, and the light splitting element 455 utilizes wavelength splitting to cause one of the first supplemental light source 42' and the first supplemental light source 42 to emit light.
  • the first supplementary light sources may also be respectively emitted through different second light guiding components corresponding thereto, for example, Assuming that the two first supplemental light sources emit two different color lights, one of the first supplemental light sources and the corresponding second light guiding component are disposed before the filter wheel with respect to the direction of the light path of the laser-assisted light-receiving wheel, A first supplemental light source and a second light guiding component corresponding thereto are disposed behind the filter wheel.
  • a solid-state light source capable of emitting light of two different colors may be disposed in a first supplemental light source, the two different colors of light being emitted to the second light guiding component in substantially parallel directions.
  • the above-mentioned light source system 40 provided by the embodiment is described below with a specific example. It is assumed that the excitation light emitted by the excitation light source 41 is the blue excitation light B, and the first complementary light emitted by the first supplementary light source 42 is the red light R.
  • the first supplemental light emitted by the first supplemental light source 42' is green light G
  • the wavelength conversion device is a reflective color wheel 44
  • the wavelength conversion material is excited by the excitation light to generate a yellow laser light Y or a yellow laser light Y and is not Converted blue excitation light (not shown).
  • the laser light is emitted from the reflective color wheel 44 through the guiding of the first light guiding component 43 and is incident on the filter wheel 46.
  • the laser light emitted from the filter wheel 46 is further incident on the second light guiding component 45, and is selected.
  • the red light R or/and the green light G reflected by the optical component 451 are emitted together to a fly-eye lens pair 47 which can function as a light homogenizing means.
  • the laser light of the red fluorescent light and the green fluorescent light can be respectively respectively according to actual needs. Red light R and green light G are added to obtain better image quality.
  • the color of the first complementary light source 42' can be replaced by green to blue, that is, the two first complementary light sources respectively emit a complementary blue laser and a complementary red laser.
  • the excitation blue light source excited by the excitation light source 41 excites the wavelength converting material to produce yellow fluorescence.
  • the excitation light source 41 that does not excite the wavelength converting material does not operate when the first complementary light source that emits the blue laser is operating.
  • FIG. 7 schematically shows the transmittance curves of the excitation blue laser spectrum BE, the complementary blue laser spectrum BL, the complementary red laser spectrum RP, the yellow fluorescence spectrum YP, and the coating of the selective optical member 451.
  • the wavelength range of the blue laser light emitted by the first supplementary light source is larger than the wavelength range of the blue laser light emitted by the first light source 41, and specifically, the blue laser light close to blue-violet is used as the excitation blue laser excitation phosphor, due to blue-violet
  • the blue laser excitation efficiency is higher than that of other wavelengths of blue laser. Therefore, the short-wavelength excitation blue laser is used to excite the phosphor, and the long-wavelength supplemental blue laser is used as the blue-based color of the light source system to achieve high-efficiency fluorescence excitation. It also guarantees the purity of the color gamut.
  • the coating can transmit most of the yellow fluorescence while transmitting the blue laser light, supplementing the blue laser and supplementing the red laser, and thus having the transmittance shown in FIG.
  • the coating of the curve characteristics can reduce the loss caused by the laser while ensuring the complementary light efficiency of the complementary light.
  • the blue color coordinate setting is set by providing a first complementary light source that emits a blue laser.
  • both the excitation blue laser and the first supplemental light can be reflected by the selective optical component 451 and emitted to the same exit channel by the yellow received laser light Y.
  • the complementary blue laser light emitted by the first complementary light source is closer to the subsequent optical path, so The supplemental blue laser does not need to pass through the first light guiding component, thereby reducing the inevitable light loss caused by the supplemental blue laser passing through the components of the first light guiding component, and can satisfy the situation that the light source system 40 requires a relatively large amount of blue light.
  • This embodiment provides another light source system 50.
  • the main difference between the light source system 50 and the light source systems shown in FIGS. 2, 3 and 6 is the first supplemental light source 52 and the second light guide assembly 55.
  • the position, the components included in the second light guiding component 55, and specifically the second light guiding component 55 in each of the above embodiments, with respect to the optical path of the filter wheel which is incident as a filter by the laser light The filter is disposed behind the filter wheel, and the second light guide assembly 55 in this embodiment is disposed before the filter wheel 56.
  • the case where the excitation light and the laser light are included is the same as that of the first embodiment, and details are not described herein again.
  • red light R which may serve as the first supplemental light, is reflected by the selective optical member 551 of the second light guiding member 55 and yellow laser light Y or yellow laser light Y and unconverted blue excitation light B.
  • the selective optical member 551 of the second light guiding member 55 is disposed between the mirror 532 and the filter wheel 56, and the selective optical member 551 guides the red reflected therethrough.
  • the light R and the yellow reflected laser light Y or the yellow received laser light Y and the unconverted blue excitation light B reflected by the mirror 532 are output to the filter wheel 56.
  • the selective optical component 551 of the second light guiding component 55 may also be disposed between the total reflection sheet 531 and the mirror 532 of the region-provided coating (not shown), selective optics.
  • the member 551 guides the red light R reflected therethrough and the yellow laser light Y or the yellow laser light Y and the unconverted blue excitation light B reflected by the total reflection sheet 531 to the mirror 532 and further to the filter. Wheel 56. Further, the laser light received by the filter wheel 56 and the first supplemental light are further incident on the third condensing lens 59 and the light homogenizing device (not shown).
  • the second light guiding component 55 further includes a diffusion sheet 552 and a fourth collecting lens 554 disposed between the first supplemental light source 52 and the selective optical component 551, and the scattering sheet is disposed.
  • the advantages of the 552 and the third concentrating lens 554 can be referred to the relevant content in the first embodiment above.
  • the positions at which the first supplemental light source and the second light guiding member are disposed utilize the gap between the mirror 532 and the filter wheel 56, the structure of the light source system can be made more compact.
  • This embodiment provides another light source system 60.
  • the main difference between the light source system 60 and the light source system 50 shown in FIG. 8 is the structure of the wavelength conversion device 64 and the filter device 66, and the first light.
  • the filter wheel 66 is a split structure, which is respectively disposed on the blue excitation light B emitted by the excitation light source 61 and the outgoing light path of the laser received light, and at least part of the components of the second light guiding component 65 are disposed in the split transmission mode.
  • the excitation light source 61 emits blue excitation light B
  • the first supplemental light emitted by the first supplementary light source 62 is red light R.
  • the blue excitation light is first incident on the transmissive color wheel 64 through the first condensing lens 631 included in the first light guiding component 63 to generate a laser beam, and the color of the laser beam may be any one of the other embodiments described above.
  • the laser is transmitted through the transmissive color wheel 64 and then directed to the selective optical component 651 of the second light guiding component 65 and is emitted to the filter wheel 66 together with the red light R, preferably in the transmissive color wheel 64.
  • the first concentrating lens 631 included in the first light guiding component 63 is disposed between the component and the selective optical component 651, and the laser light and the red light R of the filtering light wheel 66 are further incident to the compound eye which can function as a light homogenizing device.
  • Lens pair 67 is disposed between the component and the selective optical component 651, and the laser light and the red light R of the filtering light wheel 66 are further incident to the compound eye which can function as a light homogenizing device.
  • the gap is fully utilized, and therefore, Helps reduce the overall space occupied by the optical system 60.
  • the filter wheel 66 also has the function of scattering or decoherence. Therefore, compared with the embodiment 4, the scattering between the first complementary light source and the selective optical component can be correspondingly reduced in this embodiment. Tablets, thus saving costs.
  • This embodiment provides another light source system 70.
  • the main difference between the light source system 70 and the light source system 50 shown in FIG. 8 is the position of the second supplemental light source 72 and the second light guiding component 75,
  • the components included in the second light guiding component 75 are therefore not described again for the same components and optical paths as those in FIG. 8 and Embodiment 4.
  • the second light guiding component 75 of the present embodiment includes a selection. a selective optical component 751 that transmits the first supplemental light and reflects the laser light or the laser light and the unconverted excitation light to jointly output to the filter disposed outside the color wheel 74 and integrated with the color wheel 74.
  • the second light guiding assembly 75 can further include a diffusing sheet 752 and a fourth collecting lens 754 disposed between the first supplemental light source 72 and the selective optical member 751.
  • the above-described light source system 70 provided by the present embodiment will be described below with a specific example.
  • the red light R which can be used as the first supplemental light, is provided with a plated total reflection sheet 751 through the region which can be used as the selective optical component, and the total reflection sheet 751
  • the central region is provided with a coating film that transmits red light R and reflects yellow laser light Y or yellow laser light Y and unconverted blue excitation light B.
  • the edge region of total reflection sheet 751 reflects yellow laser light Y or yellow laser light Y and The blue excitation light B that is not converted, whereby the total reflection sheet 751 guides the red light R and the laser light Y, or the red light R, the yellow laser light Y, and the unconverted blue excitation light B to the filter wheel. 76.
  • the first supplemental light source 72 may also be disposed with respect to the region-provided total reflection sheet 731.
  • the first supplemental light source 72 is transmitted through the coating of the total reflection sheet 731, and is reflected by the laser or the laser and the unconverted excitation light through the region 731 except the plating film of the total reflection sheet, thereby being collectively emitted to the mirror, which is the mirror and the fourth embodiment.
  • the described mirrors have the same effect. That is, the total reflection sheet 731 described above may transmit the first supplemental light and the excitation light and reflect the laser light or the laser light and the unconverted excitation light.
  • the arrangement position of the first supplementary light source is more flexible, and in addition, with respect to the other embodiments above, it can be understood that the first light guiding component and the second light guiding component actually include The same components, that is, the same components are shared, thus helping to reduce the cost of the light source system.
  • This embodiment provides another light source system 80.
  • the first supplemental light passes through the optical component, there is inevitably a certain optical loss. Therefore, in order to further improve the light-filling efficiency of the first complementary light.
  • the number of optical components through which the first supplemental light passes is reduced.
  • the first supplemental light source 82 and the second light guiding component 85 in this embodiment are disposed on the exit channel after the laser light passes through the light homogenizing device 87.
  • the laser light emitted from the filter wheel 86 disposed outside the color wheel 84 and integrated with the color wheel 84 is emitted to the fly-eye lens pair 87, which can be used as a homogenizing device, and the received laser light and the first complementary light are used.
  • the red light R is emitted together under the guidance of a selective optical member such as a total reflection sheet 851 which is coated in a region. Specifically, the red light R can be transmitted through the coating of the total reflection sheet 851, and is subjected to the uniform light.
  • the laser or the laser and the unconverted excitation light may be reflected by the region other than the plating of the total reflection sheet 851, and the coating region may also reflect the wavelength range corresponding to the spectrum of the red light R incident thereon or with red.
  • the spectrum of the light R corresponds to a portion having a different wavelength range and different polarization states, and is partially emitted by the laser light.
  • the specific structure and action of the total reflection sheet 851 can be referred to the above, and will not be described in detail.
  • the light that is co-emitted is incident on the light valve 88 through the same exit channel, and a mirror, a condensing lens, or the like may be disposed on the same exit channel, and the light valve may be a DMD, an LCD, an LCOS, or the like.
  • the first complementary light source 82 and the second light guiding component 85 of the optical system 80 are disposed behind the light homogenizing device 87 with respect to the optical path of the light receiving device 87 that is incident on the light receiving device through the first collecting lens 833.
  • the amount of optical components passing through the red light R is greatly reduced, and the light loss of the red light R is reduced, and the light utilization rate of the red light R can be increased to about 90% or more.
  • the first light guiding component 83 includes a first collecting lens 833 and a light homogenizing device 87, that is, the filter wheel 86 is located in two of the first light guiding components, that is, two Between the first collecting lenses 833.
  • a diffusion sheet 852 and a fly-eye lens pair 853 may be disposed between the first supplementary light source 82 and the total reflection sheet 851, so that even if the first complementary light is not uniformized The homogenization of the device 87 still ensures a high degree of uniformity.
  • the main inventive point of the present invention is that the optical expansion amount of the first complementary light is smaller than the optical expansion of the laser beam by appropriately arranging the plating film on the selective optical member or the plating film integrally used for the selective optical member.
  • the amount is such that the two are optically expanded at the coating, and further, according to the wavelength spectrum of the first complementary light, the wavelength spectrum of the laser is smaller than the wavelength spectrum of the laser, so that the two also perform wavelength combining at the coating, and
  • the polarization is better (for example, the polarization state of the laser can be controlled to be substantially one), and the laser includes two polarization states (for example, the polarization state of the fluorescence includes two types).
  • the two polarization states that is, by properly setting the characteristics of the coating, for the first complementary light and the received laser light, both can be combined only by the extended amount of light, or can be realized
  • the wavelength combining light or/and the polarization state is further combined, thereby improving the light filling efficiency of the first complementary light and reducing Less loss of laser light.
  • the first supplemental light and the laser-assisted emission described herein include a case where any of the above-described light combining modes is adopted such that the first complementary light and a part of the laser light are collectively emitted through the plating film.
  • the present invention also provides a projection apparatus comprising the light source system of any of the above embodiments.
  • the light-shaping member and the light-shaping device described above may respectively adopt a light-dancing rod or a fly-eye lens pair, and the above mainly uses the first supplementary light as red light as an example, but
  • the first supplemental light may also be green light, blue light, or the like.
  • the structure and position of the filter device may also be set according to the color condition of the light passing through the filter device and the actual needs of the direction of the common exit light path, for example, different from the rotation axis of the filter wheel described in the present specification.
  • the rotating shaft of the filter wheel may also be disposed at a certain angle of preferably 45° with the rotating shaft of the color wheel.
  • the selective optical component can select at least a portion of the transmitted or/and reflected light from the laser depending on the wavelength of the light incident thereon, the polarization state, or a combination of the two.
  • the combination of the means for reflecting and transmitting the excitation light and the laser light used in the above optical path may be changed according to actual needs.
  • the X-mirror may be used instead of the total reflection sheet. It is reflected by the X mirror to the color wheel, and the laser is also reflected by the X mirror to the mirror.
  • the first light guiding assembly further includes a reflecting member disposed on the laser beam path for reflecting the laser light to the filter wheel.
  • the common exit described above can be understood as the simultaneous emission of two or more lights, and can also be understood as the emission of more than one light sequence. The description of the common exit is mainly intended to indicate that the light exits the exit channel. It is the same and should not be interpreted restrictively.

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Abstract

光源***（20），包括激发光光源（21）、第一补充光源（22）、第一光引导组件（23）、波长转换装置（24）和第二光引导组件（25）。激发光光源（21）用于发出激发光；第一补充光源（22）用于发出第一补充光。第一光引导组件（23）用于将激发光引导至波长转换装置（24）。波长转换装置（24）用于将激发光转换成受激光，并将受激光出射至第一光引导组件（23）。第一光引导组件（23）还用于引导受激光，使得受激光射向第二光引导组件（25）。第二光引导组件（25）的至少部分部件设置于受激光从第一光引导组件出射之后的光路上。第二光引导组件（25）用于引导受激光和第一补充光中的一者或两者，使得第一补充光和至少部分受激光从相同的出射通道出射。还提供一种投影设备。

Description

光源***及投影设备 技术领域
本发明涉及光学技术领域，更具体地说，涉及光源***及投影设备。
 背景技术
目前，固态光源由于其寿命长、环保等特点，已经在通用照明、特种照明和投影显示中得到了广泛的应用。其中，白光固态光源在照明领域更是有着巨大的发展潜力。
现有技术提供了一种利用激光激发荧光粉来实现超高亮度的白光光源，该白光光源采用440nm-455nm波长的蓝紫色激光激发YAG：Ce材料的黄色荧光粉，生成高效率的黄色荧光，再采用波长在440nm-470nm的蓝色激光形成与黄色荧光互补的蓝光激光，黄色荧光和蓝色激光合光后形成白色光源。
这种白色光源可以用于需要高亮度光源的投影显示领域。例如单片、双片、三片式的DLP、LCD或者LCOS投影仪等。这种白光光源发出的白光在光谱上被分为红光，绿光和蓝光三种基色光，分别入射到一个或者多个光调制器件，比如DMD、LCD芯片或者LCOS芯片上。被光调制器件调制后的红绿蓝三种基色光在光谱上再被合并起来通过一个投影镜头输出到屏幕上形成彩色图像。
由于蓝紫色激光的效率比较高，热稳定性和长期可靠性好。YAG：Ce材料的荧光粉的发光量子效率高，热稳定性好，所以蓝紫色激光和YAG：Ce荧光粉的结合形成了一个高效率，高可靠性，和高亮度的白光光源。也就是说，对于双片和三片式投影仪来说，一般采用蓝紫色激光和黄色荧光粉结合实现白光光源。
 技术问题
然而，在采用蓝紫色激光激发YAG：Ce材料的荧光粉形成白光的白光光源中，由于YAG：Ce材料的荧光粉受激发射的黄光光谱强度在红色段是减弱的，所以使得该种白光光源存在白平衡问题，即白光平衡点偏离普朗克黑体曲线，呈现一种偏绿的白色。
为了避免双片和三片式投影仪的白平衡问题，现有技术提供了一种过滤合成的白光中过剩的绿光成分，使得白平衡点恢复到普朗克黑体曲线上，以解决白平衡问题。但这种方法由于过滤了绿光成分，从而降低了该白光光源的出光效率。
现有技术提供了另一种在黄色荧光或者红色荧光中增加红色激光的方法来解决白光光源的白平衡问题，如在黄色荧光中补充光谱范围在638nm或者650nm附近的激光，以增加合光中的红色成分，从而解决白色平衡问题。
如图1所示，为现有技术提供的在黄色荧光中增加红色激光的光源***的结构。该光源***包括蓝色激发光源11，红色补充光源12，具有中心区域和边缘区域的分光滤光片13，色轮14，聚光透镜15以及匀光装置16。其中分光滤光片13的中心区域透射蓝光和红光，反射绿光，边缘区域反射红光、绿光和蓝光。这样，蓝色激光光源11发出的蓝色激发光以及红色补充光源12发出的红光经分光滤光片13的中心区域透射至色轮14，色轮14上的黄色荧光粉吸收蓝色激发光同时对红光进行散射，出射黄色荧光和散射后的红光，黄色荧光和散射后的红光经聚光透镜15入射至分光滤光片13，入射至分光滤光片13的中心区域的黄色荧光中的绿光被反射至匀光装置16，入射至分光滤光片13的边缘区域的黄色荧光和红光也被反射至匀光装置16，而入射至分光滤光片13的中心区域的黄色荧光中的红光以及散射后的红光被透射而损失。
在上述现有的白光光源中，由于红色补充光源发出的红光被荧光材料散射造成损失，大致损失5%-10%。形成朗伯光分布后被聚光透镜收集造成损失，大致损失10%，再被分光滤光片的中心区域透射而损失一部分光，大致损失10%左右，从而导致红色补充光源发出的红光的损失较大，红光的光利用率较低，大概在60-70%左右，而红色补充光源由于成本较高，同时对于散热又有较高要求，需要苛刻的散热条件，因此红光利用率低会导致成本的大幅增加，这是不利的，同理，为了得到较好的绿光，也会采用在光源中添加绿色激光的方式，类似于以上增加红色激光的增加方式，同样存在利用率低的问题。
对于单片式投影仪来说，一般采用蓝紫色激光激发时序的蓝、绿、红色段产生时序的红、绿、蓝光构成白光，蓝光即由蓝紫色激光本身提供，绿光为蓝紫色激光激发绿色荧光粉产生，红色段为蓝紫色激光激发红色荧光粉产生，而红色荧光粉在较高能量密度情况下，具有严重的效率衰减问题，导致红光占比过低，影响白平衡和图像质量
为了避免单片式投影仪的白平衡问题，现有技术中一般采用增大红光色段的方式来保持白平衡，然而这会降低白光亮度和总体光效。
因此，针对现有技术的不足，亟需提出能够提高红色、绿色等补充光源的利用率的技术方案。
 技术解决方案
有鉴于此，本发明提供了一种光源***及投影设备，以解决现有技术中包括红色补充光源在内的补充光源发出的红光或其他颜色光的光利用效率低的问题。
为实现上述一个目的，本发明提供如下技术方案：一种光源***，其包括激发光光源、第一补充光源、第一光引导组件、波长转换装置和第二光引导组件，其中：激发光光源用于发出激发光；第一补充光源用于发出第一补充光。第一光引导组件用于将激发光引导至波长转换装置；波长转换装置用于将激发光转换成受激光，并将受激光出射至第一光引导组件。第一光引导组件还用于引导受激光，使得受激光射向第二光引导组件；第二光引导组件的至少部分部件设置于受激光从第一光引导组件出射之后的光路上。第二光引导组件用于引导至少部分受激光和第一补充光中的一者或两者，使得第一补充光和至少部分受激光从相同的出射通道出射。
进一步的，第一光引导组件包括分光部件和反光部件，分光部件透射/反射激发光且相应反射/透射至少部分受激光，反光部件进一步引导至少部分受激光射向第二光引导组件。
进一步的，第二光引导组件包括选择性光学部件，选择性光学部件反射/透射第一补充光，或反射/透射第一补充光且相应透射/反射至少部分受激光。
再进一步的，选择性光学部件为反射第一补充光且透射至少部分受激光的滤光片，或者为反射第一补充光且不对至少部分受激光反射的反射片或偏振片，或者为区域设置镀膜或区域设置偏振片的滤光片。
再进一步的，第二光引导组件还包括设置于第一补充光源和选择性光学部件之间的散射部件或/和匀光部件。
再进一步的，第二光引导组件还包括第二聚光透镜，第二聚光透镜用于将经散射部件或/和匀光部件的第一补充光会聚至选择性光学部件，且第一补充光的会聚焦点在选择性光学部件上。
进一步的，光源***还包括滤光装置，滤光装置位于第一光引导组件和第二光引导组件之间，或者位于相同出射通道上。
再进一步的，波长转换装置为反射式色轮，滤光装置为滤光轮，滤光轮设置在反射式色轮的外周或内周而彼此成一体结构。
又进一步的，第二光引导组件位于第一光引导组件与滤光轮之间，或者位于从滤光轮出射的光的光路的下游。
再进一步的，波长转换装置为透射式色轮，滤光装置为滤光轮，滤光轮与透射式色轮分体设置，第二光引导组件的至少部分部件位于滤光轮与透射式色轮之间的间隙中。
又进一步的，滤光轮与透射式色轮的各自转轴平行或者重合。
再进一步的，光源***还包括匀光装置，匀光装置位于相同出射通道上。
进一步的，光源***还包括滤光装置和匀光装置，滤光装置位于第一光引导组件的其中两个部件之间，匀光装置位于受激光经过滤光装置后的出射通道上，第一补充光源和第二光引导组件所述受激光经过匀光装置后的出射通道上。
进一步的，激发光为蓝光、紫光或者紫外光。
进一步的，第一补充光为红光、绿光或蓝光中的一种或以上。
再进一步的，第一补充光源包括两个，两个第一补充光源分别发出为红光和绿光的第一补充光，第二光引导组件还包括分光元件，红光和绿光经分光元件出射至选择性光学部件。
进一步的，波长转换装置包括波长转换材料，波长转换材料为黄色荧光粉。
进一步的，第一补充光的光学扩展量小于受激光的光学扩展量。
为实现上述另一个目的，本发明提供了一种投影设备，投影设备包括上述的光源***。
 有益效果
与现有技术相比，本发明所提供的技术方案具有以下优点：
本发明通过在受激光中补充第一补充光，从而可以提高合光中第一补充光的比例，同时由于经过第二光光引导组件直接将至少部分受激光从相同的出射通道出射，而第一补充光没有经过波长转换装置的散射，从而避免了该第一补充光由于波长转换装置的散射而造成的光损失，极大的提高了该第一补充光的光利用率。
 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为现有技术提供的光源***的结构示意图；
图2为本发明第一实施例提供的光源***的结构示意图；
图3为本发明第二实施例提供的光源***的结构示意图；
图4为图3所示实施例中选择性光学部件的镀膜的反光率与第一补充光、受激光的光谱的对应关系示意图；
图5为本发明第二实施例的又一实施方式中选择性光学部件的镀膜的透光率与第一补充光、受激光的光谱的对应关系示意图
图6为本发明第三实施例提供的光源***的结构示意图；
图7为本发明第三实施例的又一实施方式中选择性光学部件的镀膜的透光率与第一补充光、受激光的光谱的对应关系示意图；
图8为本发明第四实施例提供的光源***的结构示意图；
图9为本发明第五实施例提供的光源***的结构示意图；
图10为本发明第六实施例提供的光源***的结构示意图；
图11为本发明第七实施例提供的光源***的结构示意图。
 本发明的最佳实施方式
本发明提供了一种光源***，该光源***包括至少两个光源，波长转换装置，第一光引导组件和第二光引导组件。其中至少两个光源包括激发光光源和第一补充光源，其中：激发光光源用于发出激发光，第一补充光源发出第一补充光。第一光引导组件用于将激发光光源发出的激发光引导至波长转换装置。激发光经过波长转换装置可被转换成受激光，并将该受激光出射至第一光引导组件，第一光引导组件还用于引导受激光射向第二光引导组件。优选的，该第一补充光的光学扩展量小于受激光的光学扩展量。第二光引导组件用于引导至少部分受激光和第一补充光中的一者或两者，使得第一补充光和至少部分受激光从相同的出射通道出射。
优选的，该第二光引导组件所包括的选择性光学部件的结构尺寸可以根据激发光经选择性光学部件时的光损失量、第一补充光经选择性光学部件时的光损失量、受激光经选择性光学部件时的光损失量中的一种或者多种组合进行设置。
本发明还提供了一种投影设备，包括如上所述的光源***。
本发明所提供的光源***包括至少两个光源，该至少两个光源包括激发光光源和第一补充光源，激发光光源发出的激发光通过第一光引导组件引导至波长转换装置，通过波长转换装置可见激发光转换成受激光，受激光通过第一光引导组件引导至第二光引导组件，第一补充光源发出的光学扩展量小于受激光的光学扩展量，第一补充光通过第二光引导组件与至少部分受激光合光并进一步引导至相同的出射通道出射，这样通过在受激光中补充第一补充光，从而可以提高合光中第一补充光的比例，同时由于在该相同的出射通道上可设置匀光装置或匀光装置和滤光装置，第二光引导组件可直接将第一补充光引导至匀光装置或将第一补充光经过滤光装置引导至匀光装置，而没有经过波长转换装置的散射，从而避免了该第一补充光由于波长转换装置的散射而造成的光损失，极大地提高了例如为红光的该第一补充光的光利用率，红光的光利用率大概可以提高至80%以上。
以上是本发明的核心思想，为使本发明的上述目的、特征和优点能够更加明显易懂，下面结合附图对本发明的具体实施方式做详细的说明。
在下面的描述中阐述了很多具体细节以便于充分理解本发明，但是本发明还可以采用其他不同于在此描述的其它方式来实施，本领域技术人员可以在不违背本发明内涵的情况下做类似应用，因此本发明不受下面公开的具体实施例的限制。
其次，本发明结合示意图进行详细描述，在详述本发明实施例时，为便于说明，表示器件结构的剖面图会不依一般比例作局部放大，而且所述示意图只是示例，其在此不应限制本发明保护的范围。此外，在实际制作中应包含长度、宽度及深度的三维空间尺寸。
下面通过几个实施例详细描述。
实施例一
本实施例提供了一种光源***20，如图2所示，该光源***20包括两个光源，分别为激发光光源21和第一补充光源22，还包括第一光引导组件23、波长转换装置24、第二光引导组件25。在本实施例中，以波长转换装置为反射式色轮24（如直接涂覆在反射衬底上的波长转换层）为例，当然，该波长转换装置也可以为透射式波长转换装置（如包括透明基板以及参杂在透明基板内部的波长转换材料）。其中波长转换材料包括但不限于荧光粉、量子点材料等。波长转换层为波长转换材料层或者波长转换材料与粘接剂烧结而成的膜片等。优选的，该波长转换材料可以为黄光荧光粉、黄绿荧光粉、绿光荧光粉等。作为一种具体的实施方式，第一光引导组件23包括相对设置的例如为区域设置镀膜的全反射片231的分光部件和例如为反光镜232的反光部件，作为全反射片231和反光镜232一种具体的布置方式，全反射片231和反光镜232相对于水平面成相异的45°角设置。全反射片231对应于激发光入射区域设有镀膜以透射激发光并反射受激光，其他区域均设为反射受激光、激发光或两者。进一步的，为了提高受激光或受激光和第一补充光（以下作进一步说明）的光纯度，可以在圆形色轮的外周或内周设置环形滤光轮，也就是说，反射式色轮与滤光轮为一体结构，在本发明中，一体结构的反射式色轮与滤光轮，以圆形色轮的外周设置环形滤光轮为例。反射式或透射式色轮上的波长转换材料的种类及分区，以及相应的一体的或分体的（以下作进一步说明）滤光轮的滤光片的种类及分区可以根据实际情况而定，并且色轮与滤光轮的分区各自旋转角度相匹配。为了提高激发光及受激光的利用率，第一光引导组件23还可以包括在全反射片231与反射式色轮24之间、全反射片231与反光镜232之间、反光镜232与滤光轮26之间以及滤光轮26与第二光引导组件25之间均设置的第一聚光透镜233，第一聚光透镜233可以采用凸透镜、凹透镜或两者的组合等，并且第一聚光透镜233的个数可以根据实际需要而定。
上述激发光光源21和第一补充光源22分别用于发出激发光和第一补充光。该激发光光源21和第一补充光源22分别包括固态发光组件，该固态发光组件为单个固态发光器件或者为包括多个固态发光器件的固态发光器件阵列。其中固态发光器件可以为激光二极管（LD）或者发光二极管（LED）等。该激发光为蓝光、紫光或者紫外光等。该第一补充光的光谱范围不同于该激发光的光谱范围，第一补充光的光谱范围窄于受激光的光谱范围，以提高受激光和第一补充光的合光的色饱和度。优选的，该第一补充光的光学扩展量小于受激光的光学扩展量。例如来说，该第一补充光源22发出的第一补充光的颜色可以根据对受激光的不同要求进行设置，如当受激光中缺少或不足某种颜色的光时，则该第一补充光即为该种颜色的光，如该第一补充光可以为红光、绿光、蓝光等的一种或以上，较佳的是，该第一补充光的颜色与上述受激光缺少或不足的光的某种颜色相一致，第一补充光为例如固态光源所发的激光，受激光为例如由波长转换材料受激所产生的荧光，由于激光与荧光的光谱有重叠，因此，可以通过对两者进行光学扩展量合光，从而获得更好的图像质量和更高的补光效率。
第二光引导组件25包括选择性光学部件251，另外，为了获得更好的第一补充光的出光效果，第二光引导组件25还包括设置在第一补充光源22和择性光学部件251之间的可作为散射部件的散射片252和可作为匀光部件的复眼透镜对253，其中，散射片252可对第一补充光源22包括的固态发光组件发出的第一补充光进行消相干处理，该散射片252可以为旋转的散射片、振动的散射片等，由于通过散射片252对固态发光组件发出的第一补充光进行消相干处理，从而避免了受激光与第一补充光的合光存在的散斑现象。另外，优选的，在复眼透镜对与选择性光学部件251之间设置第二聚光透镜254，从而可以将经复眼透镜对匀光后的第一补充光会聚至选择性光学部件251，较佳的是，第二聚光透镜254和选择性光学部件251的相互位置设置成第一补充光的会聚焦点在选择性光学部件251上，由于第一补充光的会聚焦点在选择性光学部件251上，且选择性光学部件251将第一补充光反射至出射通道，从而减少选择性光学部件251上用于反射第一补充光的面积，相应的，可以减少与第一补充光的光谱范围相近的受激光或者包含该相近光谱范围的部分光的受激光经过该面积时被反射所造成的光损失，提高了光利用率。此外，第一光引导组件还可以包括可作为匀光装置的方棒（未图示），该方棒设置在滤光轮26与第二光引导组件25之间的第一聚光透镜233和滤光轮26之间。
以下对选择性光学部件做出详细说明，可以了解的是，以下所述的任一种选择性光学部件不仅可被应用于本实施例中，也可以应用于其他各实施例中，除非另有说明。选择性光学部件反射第一补充光或者反射第一补充光且透射至少部分受激光。作为一种可实施的方式，选择性光学部件为包括中心膜片和边缘膜片的滤光片，其中该中心膜片的尺寸小于边缘膜片的尺寸。中心膜片和边缘膜片可以为一体式膜片，或者为各自分离式膜片。该中心膜片的尺寸可以根据第一补充光经中心膜片时的光损失量、激发光经中心膜片时的光损失量、受激光经中心膜片时的光损失量中的一种或者多种组合进行设置。作为又一种可实施的方式，选择性光学部件为单独的反射片或偏振片，或者该选择性光学部件包括反射片或偏振片和用于固定该反射片或偏振片的固定件（图未示出），在反射片或偏振片上设置镀膜，使得反射片或偏振片反射第一补充光，至少部分受激光不受反射片的反射而透射，较佳的是，反射片和偏振片的大小与第一补充光入射于两者之一上的光斑相匹配，即反射片或偏振片的全部区域被镀膜，从而可以减少反射片或偏振片对受激光的例如反射的不利影响。另外，反射片也可以不包括镀膜，则受激光中入射至反射片上的部分受激光会全部被反射而不能透射，因此会造成该部分受激光有较大的光损失，但相对于在反射片上设置镀膜来说，可以降低成本。作为再一种可实施的方式，选择性光学部件为滤光片，该滤光片为中心区域设置第一镀膜或偏振片，对于滤光片中心区域设置镀膜的情形，该滤光片的镀膜区域的一面反射第一补充光，另一面透射受激光或者受激光中的一部分但反射受激光中与第一补充色的光谱范围相近的光从而造成一定损失。对于滤光片中心区域设偏振片的情形，滤光片的边缘区域透射受激光，偏振片为针对第一补充光的偏振片，即该偏振片对具有第一偏振态的第一补充光反射，对具有第二偏振态的第二补充光透射，但是，可知的是，一般来说，对于包括固态发光组件的第一补充光源22，可以控制其所发出的第一补充光为基本具有一种偏振态的光，比如P态，因此，上述偏振片对具有P偏振态的第一补充光进行反射的同时，对受激光中的具有S偏振态的部分受激光进行透射，而例如可作为受激光的荧光包括P态和S态两种偏振态的光，因此，通过在滤光片对应于第一补充光入射区域设置偏振片，可以引导受激光中与第一补充光不同偏振态的光和第一补充光从相同的出射通道出射，因此，受激光经过偏振片区域的光只有P偏振态的光会被反射而损失，因此降低了受激光经过偏振片的损失，受激光的利用效率更高。作为另一种可实施的方式，选择性光学部件为中心区域设置第二镀膜的波长滤光片，该第二镀膜对不同偏振态的光有不同的滤光曲线，例如，对于第一补充光为P偏振态的红光，且受激光包括的均具有两种偏振态的绿光、蓝光和红光的情形，该第二镀膜可以反射为P偏振态红光的第一补充光，并透射受激光中的P和S偏振态的绿光、P和S偏振态的蓝光以及S偏振态的红光，受激光中只有P偏振态的红光会被第二镀膜反射而损失，因此相较于上述滤光片中心区域设偏振片，且该偏振片仅允许各光所包括的两种偏振态的光中的一种透射的情形，该第二镀膜可以允许各光中的部分光所包括的两种偏振态的光都透射，因此可以进一步降低受激光经过第二镀膜的损失。优选的，上述各种实施方式的各滤光片的中心膜片、中心区域设置的第一镀膜、中心区域的偏振片的面积或波长滤光片的中心区域设置的第二镀膜的面积均小于有用光斑面积的50%。其中有用光斑面积是指波长转换装置出射的受激光在整个滤光片上所形成的光斑的面积。另外，可以理解的是，上述关于中心、中心区域的位置描述并非必须的，也可根据实际需要而调整位置。还需要指出的是，以上描述了选择性光学部件反射第一补充光或者反射第一补充光并透射至少部分所述受激光的情形，但是，根据光路设计、光学部件布置等的需要，也可以是通过参照上述任一种选择性光学部件进行适当调整，使得选择性光学部件透射第一补充光或者透射第一补充光并反射至少部分所述受激光。
以下参照图2，以一个具体的示例对本发明实施例提供的上述光源***进行说明。假设激发光光源21发出的激发光为蓝色激发光B，第一补充光源22发出的第一补充光为红光R，另外，可实施的，第一补充光也可以为绿光，或者第一补充光可以包括红光和绿光。波长转换装置为反射式波长转换装置，且波长转换材料为黄色荧光粉，则上述光源***20的光路原理如下：蓝色激发光B依次经过区域设置镀膜的全反射片231和第一聚光透镜233入射至色轮24，激发色轮24的黄色荧光粉所产生黄色受激光Y或者黄色受激光Y和未被转换的蓝色激发光B被反射至第一聚光透镜233，接着进一步的，黄色受激光Y被全反射片231反射，且未被转换的蓝色激发光B射被全反射片除对应于激发光入射的镀膜区域之外的其他区域所反射，然后，黄色受激光Y或者黄色受激光Y和未被转换的蓝色激发光B被引导至第一聚光透镜233和反光镜232进而入射至滤光轮26，并进一步经过滤光轮26而入射至可作为选择性光学部件的、中心区域设置偏振片251A的滤光片251。出射至偏振片251A上的黄色受激光Y中与第一补充光的偏振态不同的光被透射以及与第一补充光的偏振态相同的光被该偏振片251A反射而损失，因此，减少了受激光中被偏振片反射的与第一补充光的偏振态不同的光，提高了受激光的利用率。出射至滤光片251的除偏振片251A之外区域的黄色受激光Y被透射。第一补充光源22发出的红光R经散射片252消相干处理以及经复眼透镜对253匀光后会聚至偏振片251A并被反射至出射通道。这样，可以在受激光中补充红光R，第一补充光的红光R与红色受激光可以通过偏振片251A实现光学扩展量合光。由于该红光R未经波长转换装置的散射，直接通过偏振片251A引导至出射通道，从而减少了该红光R的光损失，提高了该红光R的光利用率。可知的是，红光R和黄色受激光Y可通过相同的出射通道入射至光调制器件，例如一片式或三片式DMD的光调制装置。
在本实施例中，通过第一光引导组件将激发光光源发出的激发光引导至波长转换装置，并将波长转换装置出射的受激光引导至滤光装置再射向第二光引导组件，并且通过第二光引导组件将第一补充光源发出的第一补充光引导与射向第二光引导组件的受激光合光并射入出射通道，由于第一补充光未经过波长转换装置的散射，从而极大的减少了第一补充光的光损失，提高了第一补充光的补光效率。
需要强调的是，为了使说明书更简洁，以下对其它实施例的描述及其相应附图中与实施例一相同的部件及结构不再一一重述及附图标记，可以参照上述内容而得知。
实施例二
本实施例提供了另一种光源***30，如图3所示，该光源***30与图2所示的光源***20的主要区别在于第二光引导组件35的设置，具体来说，第二光引导组件35相较于实施例1，未在选择性光学部件351和第一补充光源32之间设置散射部件和匀光部件，进一步的，在第一补充光和受激光出射的相同出射通道上设置匀光装置37。以下以一个具体的示例对本实施例提供的上述光源***30进行说明，假设激发光光源31发出的激发光为蓝色激发光B，第一补充光源32发出的第一补充光为红光R，波长转换装置为反射式色轮34，且波长转换材料受激发光激发产生蓝色B、绿色G、红色R的受激光中的一种或多种，该受激光具体情况可根据光调制器件的数量和类型而定，受激光经过第一光引导组件33的引导从反射式色轮34出射并入射至滤光轮36，从滤光轮36出射后的受激光进一步射向第二光引导组件35的选择性光学部件351，并与可作为第一补充光的红光R共同出射至可作为匀光装置的复眼透镜对37。更进一步来说，本实施例中，第一补充光源32采用红激光阵列，其发出红激光R，激发光光源31采用蓝激光阵列，其发出蓝激光B，蓝激光B激发反射式色轮34上可作为波长转换材料的荧光材料产生上述一种或多种的荧光，红激光R和红荧光在选择性光学部件351的镀膜处采用扩展量合光的方式，参见图4，图4示意性的示出了红激光光谱RL与红荧光的光谱RP以及选择性光学部件351的镀膜的反光率曲线CR，由于红激光的光谱的波长范围较窄，红荧光的光谱的波长范围较宽，对于红激光光谱RL与红荧光光谱RP的峰值波长的一定范围内，部分红荧光光谱RP1（如图4中的加粗曲线所示）所对应的波长范围与反光率曲线CR和反光率曲线CR的波长范围均具有重叠部分，由此可知，镀膜在对红激光反射的同时不可避免地会对具有重叠部分多对应波长的红荧光反射，从而造成红荧光的一定的损失，但是，由于红荧光的光谱的波长范围较宽，通过合理设置镀膜的带通和带阻，对应于位于加粗曲线RP1右侧的部分红荧光光谱RP2（如图4中的虚线所示）的波长范围的红荧光不会被反射而被透射利用并与红激光共同出射，提高了受激光的利用率。另外，红激光占用复眼透镜对37的中心较小的区域，上述蓝色B、绿色G、红色R的的一种或多种的荧光占用其余区域，最终成像到光调制器件上，红激光与荧光均能形成均匀性很好的光斑，该光斑又通过投影镜头最终形成图像被人眼所观察到，因此，充分利用了复眼透镜对对光匀光以形成良好的面分布，从而，在节省了例如散射部件和匀光部件的光学部件以降低成本的同时，仍能保证出射光在可接受的较好范围之内。另外，进一步参考图5，作为进一步的又一实施方式，对于上述具有图4所示特性的镀膜的选择性光学部件351，该选择性光学部件351还可以进一步改进以增加还具有图5所示的偏振态特性，例如一种可行的改进方式，改进的选择性光学部件可以通过在偏振片设置镀膜而得到，改进的选择性光学部件具有以上图4和图5所示的反光率和透过率特性。当红激光R为S偏振态光，受激光为红荧光且包括P态和S态两种偏振态的光时，该改进的选择性光学部件反射S偏振态的红光R，并且，对除了与红激光R光谱范围所对应波长范围大致相同的红荧光中的S偏振态的光反射而造成损失之外，位于上述大致相同波长范围之外的红荧光所具有的P态和S态两种偏振态的光都可以经过该改进的选择性光学部件351而透射，从而可以在保证红激光R具有很高补光效率的同时很大程度减少红荧光的损失，因此，由上所述，通过该改进的选择性光学部件351可以对入射于其上的红激光和红荧光光学实现扩展量合光和偏振态合光。
实施例三
本实施例提供了另一种光源***40，如图6所示，该光源***40与图3所示的光源***30的主要区别在于增加了一个第一补充光源42’， 具体来说，第一补充光源42与第一补充光源42’布置在选择性光学部件451的同一侧，第一补充光源42’ 和第一补充光源42位于第二光引导组件45所包括的分光元件455的两侧，该分光元件455利用波长分光以使得第一补充光源42’和第一补充光源42的所发光中的一个透射另一个反射并从同一光路出射至选择性光学部件451，因此，即使设置两个第一补充光源，选择性光学部件451的对应于所有第一补充光的入射区域的面积也无需相应扩大，从而可以避免经过选择性光学部件451时光损失的增加。另外，需知的是，对于发出两种或以上不同颜色光的两个或以上的第一补充光源，这些第一补充光源也可以分别经过与其对应的不同的第二光引导组件而出射，例如，假设两个第一补充光源发出两种不同颜色光，相对于受激光经过滤光轮的光路方向，其中一个第一补充光源及与其对应的第二光引导组件设置在滤光轮之前，另一个第一补充光源及与其对应的第二光引导组件设置在滤光轮之后。此外，需知的是，也可以在一个第一补充光源中设置能够发出两种不同颜色的光的固态光源，该两种不同颜色的光沿基本平行方向出射至第二光引导组件。以下以一个具体的示例对本实施例提供的上述光源***40进行说明，假设激发光光源41发出的激发光为蓝色激发光B，第一补充光源42发出的第一补充光为红光R，第一补充光源42’发出的第一补充光为绿光G，波长转换装置为反射式色轮44，且波长转换材料受激发光激发产生所产生黄色受激光Y或者黄色受激光Y和未被转换的蓝色激发光（未图示）。受激光经过第一光引导组件43的引导从反射式色轮44出射并入射至滤光轮46，从滤光轮46出射后的受激光进一步射向第二光引导组件45，并与经选择性光学部件451反射的红光R或/和绿光G共同出射至可作为匀光装置的复眼透镜对47。本实施例中，由于第一补充光源有两个，且分别发出为红光R和绿光G的第一补充光，因此，可以根据实际需要，对例如为红荧光和绿荧光的受激光分别补充红光R和绿光G，从而获得更佳的图像质量。
另外，作为又一实施方式，可将上述第一补充光源42’所发光的颜色由绿色替换为蓝色，即，两个第一补充光源分别发出补充蓝激光和补充红激光。激发光光源41发出的激发蓝激光激发波长转换材料可产生黄荧光。优选的是，该发出蓝激光的第一补充光源工作时，未对波长转换材料进行激发的激发光光源41不工作。进一步参照图7，图7示意性的示出了激发蓝激光光谱BE、补充蓝激光光谱BL、补充红激光的光谱RP、黄荧光光谱YP、以及选择性光学部件451的镀膜的透光率曲线CT，第一补充光源所发出的蓝色激光的波长范围大于第一光源41所发出的蓝激光的波长范围，具体的，采用接近蓝紫色的蓝激光作为激发蓝激光激发荧光粉，由于蓝紫色的蓝激光激发效率相对于其他波长的蓝激光更高，因此，采用短波长激发蓝激光激发荧光粉，稍微长波长的补充蓝激光作为光源***的蓝基色光，既实现了高效的荧光激发，又保证了色域的纯正。并且，通过合理设置该镀膜的透光率曲线可以使得镀膜在对激发蓝激光透射、补充蓝激光和补充红激光反射的同时透射绝大部分的黄荧光，因此，具有图7所示透光率曲线特性的镀膜可以在保证补充光的补光效率的同时，尽可能减少对受激光造成的损失。另外，由于激发光光源41发出的激发蓝激光B激发反射式色轮44所产生的黄荧光Y中基本不包括蓝光，因此，通过设置一发射蓝激光的第一补充光源，该蓝光色坐标设置成更接近色域要求，当光源***的蓝光部分或者全部由该第一补充光源所发射的蓝光提供时，蓝光的色坐标会更好，当然，利用率也更高。另外，该激发蓝激光与第一补充光都可以被选择性光学部件451反射而与黄色受激光Y出射至相同出射通道，该第一补充光源所发出的补充蓝激光距离后续光路较近，因此，补充蓝激光无需经过第一光引导组件，从而减少了补充蓝激光经过第一光引导组件的各部件所不可避免造成的一定光损失，可以满足光源***40需要较大量的蓝色光的情形。
实施例四
本实施例提供了另一种光源***50，如图8所示，该光源***50与图2、3和6所示的光源***的主要区别在于第一补充光源52和第二光引导组件55的位置、第二光引导组件55所包括的部件，具体来说，相对于受激光入射可作为滤光装置的滤光轮的光路来说，以上各实施例中的第二光引导组件55均设置在滤光轮之后，而本实施例中的第二光引导组件55设置在与滤光轮56之前。对于本实施例用于对所提供的上述光源***50进行说明的一个具体示例，其所包括激发光及受激光的情况与实施例一相同，在此不再赘述。参照图8，可作为第一补充光的红光R在第二光引导组件55的选择性光学部件551的反射下和黄色受激光Y或者黄色受激光Y和未被转换的蓝色激发光B共同出射至滤光轮56，在本实施例中，第二光引导组件55的选择性光学部件551设置在反光镜532和滤光轮56之间，选择性光学部件551引导经其反射的红光R以及经反光镜532所反射的黄色受激光Y或者黄色受激光Y和未被转换的蓝色激发光B共同出射至滤光轮56。另外，作为一种可替换的实施方式，第二光引导组件55的选择性光学部件551也可以设置在区域设置镀膜的全反射片531和反光镜532之间（未图示），选择性光学部件551引导经其反射的红光R以及经全反射片531所反射的黄色受激光Y或者黄色受激光Y和未被转换的蓝色激发光B共同出射至反光镜532并进一步出射至滤光轮56。并且，经过滤光轮56后的受激光和第一补充光进一步入射至第三聚光透镜59和匀光装置（未图示）。较佳的是，在本实施例中，第二光引导组件55还包括设置于第一补充光源52和选择性光学部件551之间的散射片552和第四聚光透镜554，关于设置散射片552和第三聚光透镜554的优点可参考上文实施例一中的相关内容而得知。在本实施例中，由于第一补充光源和第二光引导组件所布置的位置利用了反光镜532和滤光轮56之间的间隙，可使光源***的结构更紧凑。
实施例五
本实施例提供了另一种光源***60，如图9所示，该光源***60与图8所示的光源***50的主要区别在于波长转换装置64与滤光装置66的结构、第一光引导组件63所包括的部件、第一补充光源62和第二光引导部件65的位置，具体来说，本实施例中的可作为波长转换装置的透射式色轮64和可作为滤光装置的滤光轮66为分体结构，两者分别设置于激发光光源61发出的蓝色激发光B和受激光的出射光路上，第二光引导组件65的至少部分部件设置在分体的透射式色轮64和滤光轮66之间的间隙中。以下以一个具体的示例对本实施例提供的上述光源***60进行说明，假设激发光光源61发出蓝色激发光B，第一补充光源62发出的第一补充光为红光R。蓝色激发光首先经过第一光引导组件63所包括的第一聚光透镜631入射至上述透射式色轮64产生受激光，该受激光的颜色可以是上述其它各实施例中的任意一种情况，受激光经过透射式色轮64透射后射向第二光引导组件65的选择性光学部件651并与为红光R共同出射至滤光轮66，优选的是，在透射式色轮64和选择性光学部件651组件之间布置第一光引导组件63所包括的第一聚光透镜631，并且，经过滤光轮66的受激光和红光R进一步入射至可作为匀光装置的复眼透镜对67。在本实施例中，通过将第二光引导组件65的选择性光学部件651设置在分体的透射式色轮64和滤光轮66之间的间隙中，充分利用了该间隙，因此，有助于减小光学***60所占的整体空间。另外，一般的，滤光轮66也具有散射即消相干的作用，因此相较于实施例4，在本实施例中也可相应减少设置于第一补充光源和选择性光学部件之间的散射片，从而节约成本。
实施例六
本实施例提供了另一种光源***70，如图10所示，该光源***70与图8所示的光源***50的主要区别在于第二补充光源72和第二光引导组件75的位置、第二光引导组件75所包括的部件，因此，对于与图8及实施例四中相同部件和光路不再赘述，具体来说，参照图10，本实施例的第二光引导组件75包括选择性光学部件751，该选择性光学部件751为透射第一补充光并反射受激光或者受激光和未被转换的激发光以共同出射至布置在色轮74外侧并与色轮74一体的滤光轮76上，可知的，第二光引导组件75还可以包括设置于第一补充光源72和选择性光学部件751之间的散射片752和第四聚光透镜754。以下以一个具体的示例对本实施例提供的上述光源***70进行说明，可作为第一补充光的红光R经过可作为选择性光学部件的区域设置镀膜的全反射片751，全反射片751的中心区域设有透射红光R和反射黄色受激光Y或者黄色受激光Y和未被转换的蓝色激发光B的镀膜，全反射片751的边缘区域反射黄色受激光Y或者黄色受激光Y和未被转换的蓝色激发光B，从而，全反射片751引导红光R和受激光Y、或者红光R、黄色受激光Y和未被转换的蓝色激发光B共同出射至滤光轮76上。另外，类似的，参照第一补充光源72相对于选择性光学部件751的布置方式，第一补充光源72也可以相对于区域设置镀膜的全反射片731布置，此种情况下，第一补充光源72透射经过全反射片731的镀膜，受激光或者受激光和未被转换的激发光经过全反射片除镀膜以外的区域731反射，从而共同出射至反光镜，此反光镜与实施例四中所描述的反光镜的作用相同。也就是说，上述全反射片731可以透射第一补充光和激发光并反射受激光或者受激光和未被转换的激发光。由上所述，本实施例中，第一补充光源的布置位置更灵活，另外，相对于以上其他各实施例，可以理解的是，第一光引导组件和第二光引导组件实际上包括了相同部件，也就是共用了相同部件，因此，有助于降低光源***的成本。
实施例七
本实施例提供了另一种光源***80，如图11所示，由于第一补充光经过光学部件时，不可避免的存在一定的光损失，因此，为了进一步提高第一补充光的补光效率，减少第一补充光所经过的光学部件的数量，本实施例中的第一补充光源82和第二光引导组件85设置在受激光经过匀光装置87后的出射通道上。以下以一个具体的示例来对本实施例做更具体的说明，对于与图3及实施例二中相同部件和光路不再赘述。从布置在色轮84外侧并与色轮84一体的滤光轮86出射后的受激光出射至可作为匀光装置的复眼透镜对87，经过匀光后的受激光和可作为第一补充光的红光R在例如为区域设置镀膜的全反射片851的选择性光学部件的引导下共同出射，具体来说，红光R可以经过全反射片851的镀膜而透射，经过匀光后的受激光或者受激光和未被转换的激发光可以经过全反射片851的镀膜以外区域而反射，并且，上述镀膜区域还可以反射入射于其上的与红光R的光谱对应波长范围不同或与红光R的光谱对应波长范围不同且偏振态相异的部分受激光，从而共同出射，关于全反射片851的具体结构及作用可以参照上文得出，不再详述。上述共同出射的光经过相同出射通道入射至光阀88，在该相同出射通道上可布置反光镜、聚光透镜等，光阀可以是DMD、LCD、LCOS等。本实施例中，相对于受激光经过第一聚光透镜833入射匀光装置87的光路，光学***80的第一补充光源82和第二光引导组件85均设置在匀光装置87之后，可以较大程度地减少红光R所经过光学部件的数量，减少红光R的光损失，红光R的光利用率大概可以提高至90%以上。可知的是，本实施例中第一光引导组件83包括了第一聚光透镜833和匀光装置87，也就是说，滤光轮86位于第一光引导组件的其中两个部件即两个第一聚光透镜833之间。另外，为了对第一补充光消相干和匀光，还可以在第一补充光源82和全反射片851之间设置散射片852和复眼透镜对853，因此，即使第一补充光未经过匀光装置87的匀光作用，其仍可保证较高的均匀性。
综合上述各实施例可知，本发明的主要发明点在于通过合理地设置选择性光学部件上的镀膜或者选择性光学部件整体采用的镀膜，根据第一补充光的光学扩展量小于受激光的光学扩展量，使得两者在镀膜处进行光学扩展量合光，在此基础上，进一步可根据第一补充光的波长光谱小于受激光的波长光谱，使得两者在镀膜处还进行波长合光，另外，进一步也可根据第一补充光的偏振性较好（例如，激光的偏振态可以控制为基本为一种），而受激光包括两种偏振态的光（例如，荧光的偏振态包括两种），因此，也可使两者进行偏振态合光，也就是说，通过合理设置镀膜的特性，对于第一补充光和受激光光，两者可以仅通过扩展量合光，也可以在实现扩展量合光的基础上，再进一步的进行波长合光或/和偏振态合光，从而既提高了第一补充光的补光效率又减少了受激光的损失。再者，本文所描述的第一补充光和受激光共同出射包括了采用上述任一合光方式使得第一补充光和部分受激光共同经过镀膜而出射的情形。关于上述镀膜的合理设置，可以参照实施例二和图4和5、及实施例三和图7所记载内容结合本领域已有制作镀膜的工艺和方法而得到，另外，可知的是，对于文中所述的滤光片的中心膜片、滤光片中心区域设置的偏振片、波长滤光片的中心区域设置的第二镀膜、单独的反射片或偏振片的镀膜均可以参照上述记载内容而设置它们的反光率或透光率曲线，从而获得相应的技术效果。此外，文中所述的镀膜仅为一种具体举例说明，不应作为限制，只要能起到本文中镀膜所起到的可对不同光进行选择性透射和反射的光学部件，均在本发明保护范围之内。
本发明还提供了一种投影设备，该投影设备包括上述任一实施例中的光源***。
需要说明的是，根据实际情况，上文所述的匀光部件和匀光装置可以分别采用匀光棒或复眼透镜对，上文主要以第一补充光为红光为例进行说明，但不应以此为限，第一补充光也可以是绿光、蓝光等。另外，滤光装置的结构和位置也可以根据经过滤光装置的光的颜色情况以及共同出射光路方向的实际需要而设定，例如，有别于本说明中所描述的滤光轮的转轴和色轮的转轴重合或平行的情形，滤光轮的转轴也可以设置成与色轮的转轴成优选为45°的一定角度。再者，选择性光学部件可以根据入射于其上的光的波长、偏振态或两者的结合等情况而选择透射或/和反射受激光中的至少部分光。还有，上述光路中所采用的对激发光和受激光的反射和透射技术手段的组合可以根据实际需要而做一定的变化，例如，可以用X镜替代全反射片，此时，激发光可以被X镜反射至色轮，而受激光亦可被X镜反射至反光镜。此外，也可以采用为一体结构的透射式色轮和滤光轮，此时，第一光引导组件还包括在受激光光路上设置的用于反射受激光至滤光轮的反光部件。再还有，上文中所述的共同出射可以理解为两个以上的光同时出射，也可以理解为一个以上的光时序出射，对该共同出射的描述主要意在说明是各光出射的出射通道是相同的，不应做限制性的理解。
以上所述仅为本发明的优选实施例，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者直接、间接运用在其他相关的技术领域，均视为包括在本发明的专利保护范围内。

Claims (16)

1、一种光源***，其特征在于，包括激发光光源、第一补充光源、第一光引导组件、波长转换装置和第二光引导组件，其中：
所述激发光光源用于发出激发光；
所述第一补充光源用于发出第一补充光；
所述第一光引导组件用于将所述激发光引导至所述波长转换装置；
所述波长转换装置用于将所述激发光转换成受激光，并将所述受激光出射至所述第一光引导组件；
所述第一光引导组件还用于引导所述受激光，使得所述受激光射向所述第二光引导组件；
所述第二光引导组件的至少部分部件设置于所述受激光从所述第一光引导组件出射之后的光路上；
所述第二光引导组件用于引导至少部分所述受激光和所述第一补充光中的一者或两者，使得所述第一补充光和至少部分所述受激光从相同的出射通道出射。
2、根据权利要求1所述的光源***，其特征在于，所述第一光引导组件包括分光部件和反光部件，所述分光部件透射/反射所述激发光且相应反射/透射至少部分所述受激光，所述反光部件进一步引导所述至少部分受激光射向所述第二光引导组件。
3、根据权利要求1所述的光源***，其特征在于，所述第二光引导组件包括选择性光学部件，所述选择性光学部件反射/透射所述第一补充光，或反射/透射所述第一补充光且相应透射/反射至少部分所述受激光。
4、根据权利要求3所述的光源***，其特征在于，所述选择性光学部件为反射所述第一补充光且透射至少部分所述受激光的滤光片，或者为反射所述第一补充光且不对至少部分所述受激光反射的至少部分区域设置镀膜的反射片或偏振片，或者为区域设置镀膜或区域设置偏振片的滤光片。
5、根据权利要求3所述的光源***，其特征在于，所述第二光引导组件还包括设置于所述第一补充光源和所述选择性光学部件之间的散射部件或/和匀光部件。
6、根据权利要求3所述的光源***，其特征在于，所述第二光引导组件还包括第二聚光透镜，所述第二聚光透镜用于将经所述散射部件或/和匀光部件的所述第一补充光会聚至所述选择性光学部件，且所述第一补充光的会聚焦点在所述选择性光学部件上。
7、根据权利要求1所述的光源***，其特征在于，所述光源***还包括滤光装置，所述滤光装置位于所述第一光引导组件和第二光引导组件之间，或者位于所述相同出射通道上。
8、根据权利要求7所述的光源***，其特征在于，所述波长转换装置为反射式色轮，所述滤光装置为滤光轮，所述滤光轮设置在所述反射式色轮的外周或内周而彼此成一体结构。
9、根据权利要求8所述的光源***，其特征在于，所述第二光引导组件位于所述第一光引导组件与所述滤光轮之间，或者位于从滤光轮出射的受激光的光路的下游。
10、根据权利要求7所述的光源***，其特征在于，波长转换装置为透射式色轮，所述滤光装置为滤光轮，所述滤光轮与所述透射式色轮分体设置，所述第二光引导组件的至少部分部件位于所述滤光轮与所述透射式色轮之间的间隙中。
11、根据权利要10所述的光源***，其特征在于，所述滤光轮与所述透射式色轮的各自转轴平行或者重合。
12、根据权利要求7所述的光源***，其特征在于，所述光源***还包括匀光装置，所述匀光装置位于所述相同出射通道上。
13、根据权利要求1所述的光源***，其特征在于，所述光源***还包括滤光装置和匀光装置，所述滤光装置位于所述第一光引导组件的其中两个部件之间，所述匀光装置位于所述受激光经过所述滤光装置后的出射通道上，所述第一补充光源和第二光引导组件位于所述受激光经过所述匀光装置后的出射通道上。
14、根据权利要求1所述光源***，其特征在于，所述第一补充光为红光、绿光或蓝光中的一种或以上。
15、根据权利要求3所述光源***，其特征在于，所述第一补充光源包括两个，所述两个第一补充光源分别发出为红光和绿光的第一补充光，所述第二光引导组件还包括分光元件，所述红光和所述绿光经所述分光元件出射至所述选择性光学部件。
16、一种投影设备，其特征在于，所述投影设备包括权利要求1至15任一项所述的光源***。
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