WO2020073812A1 - 一种光源装置 - Google Patents

一种光源装置 Download PDF

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Publication number
WO2020073812A1
WO2020073812A1 PCT/CN2019/108007 CN2019108007W WO2020073812A1 WO 2020073812 A1 WO2020073812 A1 WO 2020073812A1 CN 2019108007 W CN2019108007 W CN 2019108007W WO 2020073812 A1 WO2020073812 A1 WO 2020073812A1
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WO
WIPO (PCT)
Prior art keywords
wavelength conversion
light
light source
conversion unit
excitation light
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PCT/CN2019/108007
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English (en)
French (fr)
Inventor
余新
张贤鹏
常静
李屹
Original Assignee
深圳光峰科技股份有限公司
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Publication of WO2020073812A1 publication Critical patent/WO2020073812A1/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
    • G03B21/2006—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
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • 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
    • G03B21/16—Cooling; Preventing overheating
    • 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
    • G03B21/2033—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
    • G03B21/2066—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
    • G03B21/208—Homogenising, shaping of the illumination light

Definitions

  • the invention relates to the technical field of optics, in particular to a light source device.
  • the existing illumination light sources are mainly LED, xenon and halogen light sources. These light sources have the disadvantages that the brightness is not high enough, the service life is not long enough, and the beam divergence angle is large, which results in insufficient illumination distance. As an emerging lighting technology, laser lighting has become a future lighting development trend due to its high brightness, long service life, and small beam collimation divergence angle.
  • the white light obtained by the red, green and blue laser has a large color gamut range, high brightness and high cost, and is suitable for application in the high-end display field.
  • the red, green, and blue lasers cover a narrow wavelength range and low display index, which is not practical.
  • the white light obtained by laser excitation of the wavelength conversion material also has the characteristics of high brightness, and it is more economical than the red, green, and blue laser solution.
  • the bottleneck is mainly whether the wavelength conversion material can withstand the high power density. With laser irradiation, the wavelength conversion material is prone to decrease in luminous efficiency at high temperatures.
  • the diameter of the fluorescent color wheel used is getting larger and larger, which makes the advantage of the "small volume" of the laser light source gradually reduce;
  • the size of the incident spot of the laser on the wavelength conversion material Reduce the excitation light power per unit area, whether it is a transmissive color wheel or a reflective color wheel, the size of the exit spot is directly related to the area of the incident spot (approximately equal), which makes the light collection system of the exit light also size It becomes larger, which is not conducive to compact structural design.
  • the improvement of the heat dissipation effect by expanding the spot area is non-linear, and the heat in the center of the spot becomes more and more difficult to dissipate, which leads to diminishing heat dissipation benefits.
  • the brightness improvement of this technical solution is not scalable.
  • the present invention provides a high-brightness, small-volume light source device, including: an excitation light source for emitting excitation light; a rotating tube, including a side And a plurality of wavelength conversion units distributed along the circumferential direction.
  • the wavelength conversion unit includes a wavelength conversion material for absorbing the excitation light and emitting a received laser, and a driving device for driving the rotating cylinder to rotate around its central axis;
  • the excitation light enters the wavelength conversion unit along the radial direction of the rotating cylinder, and the received laser light exits the wavelength conversion unit along the axial direction of the rotating cylinder.
  • the present invention includes the following beneficial effects: by arranging the wavelength conversion unit on the peripheral side of the rotating cylinder, the excitation light is incident on the wavelength conversion unit in the radial direction of the rotating cylinder, and the laser light is received along the rotating cylinder Axial exit from the wavelength conversion unit, so that the incident spot of the excitation light and the exit spot of the laser beam are completely separated, so that the area of the incident spot can be arbitrarily enlarged without changing the size of the exit spot to achieve high brightness and light source device Compact structure.
  • the total area of the incident spot where the excitation light enters the wavelength conversion unit is larger than the total area of the exit spot where the received laser light exits from the wavelength conversion unit.
  • the excitation light includes an array of sub-excitation beams, and an array of incident sub-spots arranged along the axis of the rotating cylinder is formed on the surface of the wavelength conversion unit.
  • the excitation light source includes a sub-excitation light source array for emitting the sub-excitation light beam array; or the excitation light source includes a laser light source and a mirror array, and the mirror array includes a plurality of parallel arranged Reflectors, and each reflector gradually increases in reflectance and decreases in transmittance in a direction away from the laser light source, and the excitation light emitted from the laser light source is sequentially incident on each reflector of the mirror array in the same direction After reflection, a parallel array of the sub-excitation beams is formed.
  • the wavelength conversion unit includes a first surface and a second surface disposed oppositely, a first end surface and a second end surface disposed oppositely, and two side surfaces connecting the first surface and the second surface;
  • the first surface is the light incident surface of the wavelength conversion unit, the first surface is parallel to the central axis of the rotating cylinder, the first end surface is the light exit surface of the wavelength conversion unit, and the first end surface Perpendicular to the central axis of the rotating cylinder, the area of the first end surface is smaller than that of the first surface, and both the second surface and the second end surface are light reflecting surfaces.
  • the first surface is provided with a filter layer that transmits the excitation light and reflects the received laser light.
  • the technical solution is beneficial to improving the utilization rate of excitation light and ensuring that the received laser light all exits from the light exit surface different from the light entrance surface.
  • the first surface is provided with an angle-selective film layer, transmits excitation light with an incident angle smaller than a preset angle, reflects laser light and excitation light with an incident angle greater than a preset angle.
  • This technical solution enables the wavelength conversion unit to emit a mixture of excitation light and laser light.
  • the wavelength conversion unit includes a wavelength conversion layer disposed close to the second surface, and a cavity or a high refractive index medium is provided between the wavelength conversion layer and the first surface.
  • the wavelength conversion layer of each of the wavelength conversion units is a part of a continuum.
  • the wavelength conversion unit includes a fluorescent single crystal, and the first surface and the second surface are two opposite surfaces of the fluorescent single crystal.
  • it further includes a light blocking sheet disposed between adjacent sides of the wavelength conversion unit, and the light blocking sheet has light reflection properties.
  • it further includes a light collection device, which is disposed on the exit light path of the laser beam, and the light collection device includes a uniform light rod, a compound parabolic concentrator, or a condensing lens.
  • the first end surface area is greater than twice the surface area.
  • the rotating cylinder further includes a cylindrical base body, the wavelength conversion unit is disposed around the cylindrical base body, and a heat sink is provided in a cavity of the cylindrical base body.
  • the technical solution uses the internal space of the rotating cylinder to form a heat dissipation channel. Further, the heat dissipation fins are arranged in a turbine, which drives the air flow to flow in one direction, forming a self-heat dissipation structure, which improves the heat dissipation effect.
  • FIG. 1 is a schematic structural diagram of a light source device according to Embodiment 1 of the present invention.
  • FIG. 2 is a cross-sectional view of the rotating barrel of the light source device shown in FIG. 1.
  • FIG. 3 is a schematic diagram of the positional relationship between the rotating cylinder and the excitation light at different periods.
  • FIG. 4 is a schematic structural diagram of a light source device according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic structural diagram of a light source device according to a modified embodiment of Embodiment 2 of the present invention.
  • FIG. 6 is a schematic structural diagram of a light source device according to Embodiment 3 of the present invention.
  • FIG. 7 is a cross-sectional view of the rotating barrel of the light source device shown in FIG. 6.
  • Embodiment 8 is a wavelength conversion unit of a light source device according to a modified embodiment of Embodiment 3 of the present invention
  • FIG. 9 is a schematic structural diagram of a light source device according to Embodiment 4 of the present invention.
  • FIG. 1 is a schematic structural diagram of a light source device according to Embodiment 1 of the present invention.
  • the light source device 10 includes a laser light source 110, a rotating cylinder 120, and a driving device 130.
  • the laser light source 110 emits the excitation light L1, and the excitation light L1 irradiates the side surface of the rotary cylinder 120 along the radial direction of the rotary cylinder 120.
  • the driving device 130 is connected to the rotating cylinder 120, and the rotating cylinder 120 is driven to rotate about its central axis AX so that different areas of the rotating cylinder 120 are illuminated by the excitation light L1.
  • the driving device 130 specifically includes a motor and a connection between the motor and the rotating cylinder 120 unit.
  • the rotating drum 120 includes a plurality of wavelength conversion units 121 disposed on the side and distributed along the circumferential direction. Driven by the driving device 130, the wavelength conversion units are sequentially located on the optical path of the excitation light L1 in time sequence.
  • the wavelength conversion unit 121 includes a wavelength conversion material, and the excitation light L1 incident on the wavelength conversion unit is at least partially absorbed and converted to be emitted by the laser light L2.
  • the received laser light L2 is emitted from the wavelength conversion unit 121 along the axial direction of the rotating cylinder 120 (and the AX axis direction).
  • the light incident surface and the light exit surface of the wavelength conversion unit 121 are two different surfaces, and the emitted laser light L2 changes the direction of 90 ° relative to the original incident excitation light L1 (understandably, “along the axial direction "And" in the radial direction "are not strictly along this direction, and the angle of the beam within the error range is also within the scope of protection of the present invention, for example, within ⁇ 5 ° from the radial or axial direction), which makes the incident spot
  • the total area is not necessarily related to the size of the total area of the exit spot. Unlike the color wheel scheme, whether it is a reflective color wheel or a transmissive color wheel, the area of the outgoing light spot is always similar to the area of the incoming light spot. This allows the technical solution of the present invention to have a higher degree of freedom in design. According to the brightness requirements of the emitted light and the size requirements of the rear optical path device, different incident surface areas and exit surface areas can be designed to obtain the desired light beam.
  • the total area of the incident spot where the excitation light L1 enters the wavelength conversion unit 121 is larger than the total area of the outgoing spot emitted by the laser light L2 from the wavelength conversion unit 121, which can increase the optical power density of the outgoing light.
  • the focus of the invention is on the structure of the rotating cylinder and the relationship between the light incident surface and the light exit surface of the rotating cylinder.
  • the structure of the rotating drum 120 of this embodiment will be described in further detail below.
  • FIG. 2 is a cross-sectional view of the rotating barrel of the light source device shown in FIG.
  • 16 wavelength conversion units are circumferentially arranged along the side of the rotating cylinder 120 (it can be understood that this embodiment takes 16 as an example, and does not limit the number of wavelength conversion units).
  • the size of each wavelength conversion unit is the same.
  • the wavelength conversion unit 121 includes a first surface 1211 and a second surface 1212 disposed oppositely, including a first end surface 1213 and a second end surface 1214 disposed oppositely, and two side surfaces 1215 and 1216 connecting the first surface and the second surface.
  • the first surface 1211 is a light incident surface of the wavelength conversion unit 121, the first surface 1211 is parallel to the central axis AX of the rotating cylinder 120, and the second surface 1212 opposite to the first surface 1211 is a light reflecting surface (such as a mirror reflecting surface , Diffuse reflection surface) to avoid direct emission of excitation light.
  • the first end surface 1213 is a light exit surface of the wavelength conversion unit, the first end surface 1213 is perpendicular to the central axis AX of the rotating cylinder, and the second end surface 1214 opposite to the first end surface 1213 is a light reflection surface (such as a mirror reflection surface and a diffuse reflection surface ), So that the received laser light L2 is emitted from the first end surface 1213.
  • the first surface 1211 has a larger size in the direction along the central axis AX, so that the area of the first surface 1211 is larger than the first end surface 1213.
  • the first surface 1211 further includes a filter layer 1211a for transmitting excitation light and reflecting the received laser light.
  • the filter layer 1211a ensures that the received laser light does not exit the first surface 1211, so that the received laser light is concentrated on the first end surface 1213 with a small area and exits.
  • the filter film layer 1211a can be optimized as an angle filter film, transmitting excitation light with an incident angle less than a preset angle (eg, 5 °), reflecting laser light, and having an incident angle greater than a preset Excitation light at an angle (such as 5 °).
  • the filter film 1211a may be a filter film with an angle of 0 °, transmitting only the excitation light incident vertically, reflecting the excitation light at other angles, and reflecting all the received laser light. This technical solution enables the outgoing light to include not only the received laser but also the excitation light.
  • the excitation light is blue light
  • the yellow wavelength conversion material can be combined to obtain a mixture of blue light and yellow light as the outgoing light, thereby obtaining white light.
  • a light blocking sheet 123 is also provided between the side surfaces of adjacent wavelength conversion units.
  • the light blocking sheet 123 has a light reflection property, so that light incident on the side surfaces 1215 and 1216 of the wavelength conversion unit is reflected Back inside the wavelength conversion unit 121.
  • the light blocking sheet may be glass or sapphire plated with a highly reflective film layer, or may be a diffuse reflection material layer, or a reflective film layer (such as a silver or aluminum metal reflective layer or dielectric film directly plated on the side of the wavelength conversion unit) Reflective layer) to separate each wavelength conversion unit.
  • the light blocking sheet 123 can be fixed by being inserted into the groove, or fixed by glue.
  • the excitation light source in this embodiment may be a laser light source or an LED light source, either a single light source or a combined array of multiple light sources. This embodiment does not further describe the excitation light source. In the following embodiments, some embodiments of the excitation light source will be listed.
  • the wavelength conversion material of the wavelength conversion unit 121 is a fluorescent single crystal
  • the internal main structure of the wavelength conversion unit 121 is a fluorescent single crystal
  • the first surface 1211 and the second surface 1212 are two opposite sides of the fluorescent single crystal. s surface.
  • the filter layer 1211a is directly plated on the first surface 1211 of the fluorescent single crystal.
  • the fluorescent single crystal may be, for example, a Ce: YAG single crystal, capable of absorbing blue light and emitting yellow light. It is transparent or semi-transparent, so that the light beam can be conducted inside, and finally exits through the first end face 1213.
  • each wavelength conversion unit surrounding the rotating cylinder 120 is the same fluorescent single crystal, then the light source device emits light of a single spectrum. It can be understood that, in other embodiments of the present invention, different types of wavelength conversion units may also be provided around the rotating cylinder to emit light of different spectra at different time periods.
  • the light source device 10 of this embodiment further includes a light collecting device 140, which is disposed on the exit light path of the laser beam L2.
  • the light collecting device 140 of this embodiment is a lens group composed of light collecting lenses.
  • FIG. 3 is the positional relationship between the rotating cylinder 120 and the excitation light L1 in different periods.
  • the rotating drum rotates clockwise, T1 ⁇ T2 ⁇ T3 ⁇ T4 from left to right in order according to time.
  • the end surface of the wavelength conversion unit marked with oblique lines corresponds to the outgoing light spot.
  • the position of the exit spot is constantly changing.
  • the excitation light L1 is irradiated between two adjacent wavelength conversion units, the excitation light enters the two wavelength conversion units at the same time, making the area of the exit spot double. .
  • the periodic change is made within the dotted frame shown in the figure.
  • the incident surface area of the light collection device is the spot area that the light collecting lens can collect at its object plane position.
  • the rotating cylinder 120 of this embodiment further includes a cylindrical base 122 for carrying the wavelength conversion unit 121, and the wavelength conversion unit 121 is disposed around the cylindrical base 122.
  • the rotating cylinder 120 of this embodiment further includes fins 124 disposed in the cavity of the cylindrical base 122.
  • the radiating fins are arranged in a turbine, which drives the airflow to flow in one direction, forming a self-radiating structure and improving the cooling effect.
  • the heat sink 124 is not a necessary structure of the light source device of the present invention, and a heat sink may not be provided.
  • the excitation light source 110 as a whole emits the excitation light L1 to the wavelength conversion unit of the rotating cylinder 120.
  • the excitation light source may be a single light source, or may be composed of a light source array including multiple light sources.
  • FIG. 4 is a schematic structural diagram of a light source device according to Embodiment 2 of the present invention.
  • the light source device 20 includes an excitation light source 210, a rotating cylinder 220, a driving device 230, and a light collecting device 240.
  • the excitation light source 210 includes a sub-excitation light source array for emitting a sub-excitation beam array, and the sub-excitation beam array constitutes the excitation light, which is converted at a wavelength
  • the cell surface forms an array of incident sub-spots arranged along the axial direction of the rotating cylinder 220.
  • the excitation light source 210 of this embodiment includes a plurality of sub-excitation light sources 211, and different sub-excitation light sources 211 respectively form an incident spot on the surface of the rotating cylinder 220, so that the total area of the incident spot is greatly increased, and it is not necessary to concentrate the energy on one spot.
  • the wavelength conversion material is overloaded.
  • the number of sub-excitation light sources 211 that are turned on can be independently controlled to control the brightness of the output light.
  • the light output surface of the wavelength conversion unit is made so that the total area of the outgoing light spot does not change with the area of the incident light spot, which can ensure that there is no need to adjust the size of the light collection device.
  • different sub-excitation light sources may have different excitation light spectral ranges.
  • the light collection device 240 of this embodiment includes a uniform rod, which is specifically a cone rod, and the incident surface area is smaller than the exit surface area.
  • the light homogenizing rod is used for homogenizing the light emitted by the wavelength conversion unit, and on the other hand, reducing the divergence angle of the light emitted by the wavelength conversion unit.
  • the incident surface area of the light collection device 240 in order to enable the light collection device 240 to collect most of the light emitted by the wavelength conversion unit, it is necessary to make the incident surface area of the light collection device 240 greater than twice the first end surface area of the wavelength conversion unit .
  • FIG. 5 is a schematic structural diagram of a light source device according to a modified embodiment of the second embodiment shown in FIG. 4 of the present invention.
  • the light source device 20 ' includes an excitation light source 210', a rotating cylinder 220 ', a driving device 230' and a light collecting device 240 '.
  • the difference between this embodiment and the second embodiment is specifically that the excitation light source 210 'and the light collection device 240' are different.
  • the excitation light source 210 'in this embodiment includes a laser light source 211' and a mirror array 212 ', wherein the mirror array 212' includes a plurality of mirrors arranged in parallel, and each mirror reflects in a direction away from the laser light source 211 ' The rate gradually increases and the transmittance gradually decreases.
  • the excitation light emitted by the laser light source 211 ' is sequentially incident on the mirrors of the mirror array 212' in the same direction, partially transmitted and partially reflected, and finally forms a parallel array of sub-excitation beams .
  • the technical solution has a higher degree of flexibility in position design, and a denser array of incident sub-spots can be obtained without being limited by the spacing requirements of adjacent lasers.
  • a high-power laser can be used to provide excitation light, and a sub-excitation beam array can be obtained through the mirror array.
  • the laser light source in this embodiment is disposed away from the laser receiving outlet. It can be understood that in other embodiments of the present invention, the laser light source may also be disposed on the side close to the laser receiving outlet to achieve the folding of the optical path and achieve compactness Type structure design.
  • the light collecting device 240 replaces the light diffusing rod of the light collecting device 240 in the second embodiment with a compound parabolic concentrator.
  • the entrance of the compound parabolic concentrator is close to the first end surface of the wavelength conversion unit. Realize the collection of the received laser L2.
  • the entrance area of the compound parabolic concentrator needs to be greater than twice the area of the first end surface of the wavelength conversion unit.
  • the light collection devices listed above include a uniform light rod, a compound parabolic concentrator, and a collecting lens. Such structures can be arbitrarily replaced or combined in various embodiments of the present invention.
  • the wavelength conversion unit includes a fluorescent single crystal.
  • FIG. 6 is a schematic structural diagram of a light source device according to Embodiment 3 of the present invention.
  • FIG. 7 is a cross-sectional view of a rotating barrel of the light source device shown in FIG. 6.
  • the light source device 30 includes an excitation light source 310, a rotating cylinder 320, a driving device 330, and a light collection device 340.
  • the excitation light source 310 can refer to the description of the excitation light source 110, 210 or 210 'in the above embodiments
  • the driving device 330 can refer to the description of the driving device 130
  • the light collection device 340 can refer to the light collection device in the above embodiments The description will not be repeated here.
  • the rotating cylinder 320 includes a cylindrical base 322 and a plurality of wavelength conversion units 321 disposed on the side of the rotating cylinder 320 and distributed along the circumferential direction.
  • the wavelength conversion unit 321 includes a first surface 3211 and a second surface 3212 disposed oppositely, including a first end surface 3213 and a second end surface 3214 disposed oppositely, and two side surfaces connecting the first surface and the second surface.
  • the first surface is a light incident surface of the wavelength conversion unit
  • the first end surface is a light exit surface of the wavelength conversion unit
  • the area of the first surface is larger than the area of the first end surface.
  • the wavelength conversion unit 321 includes a wavelength conversion layer 321a and a high refractive index medium 321b (medium with a refractive index greater than or equal to 1.6, such as glass, sapphire, etc.), wherein the wavelength conversion layer 321a is disposed near the second surface 3212, and the wavelength conversion layer 321a and the third Between the surfaces 3211 is a high refractive index medium 321b. After the excitation light L1 enters the wavelength conversion unit 321 through the first surface 3211, it passes through the high refractive index medium 321b and reaches the wavelength conversion layer 321a. After being at least partially absorbed, the wavelength conversion layer 321a exits the received laser light L2.
  • a high refractive index medium 321b medium with a refractive index greater than or equal to 1.6, such as glass, sapphire, etc.
  • the received laser light L2 is reflected and conducted in the high refractive index medium 321b, reaches the first end surface 3213, and then exits.
  • the refractive index difference between the high-refractive-index medium 321b and the outside air can be used to totally reflect the laser light incident on the first surface at a large angle, or a filter layer can be additionally provided on the first surface to ensure the laser light reception Of reflection.
  • the high-refractive-index medium 321b can also be replaced by a cavity.
  • a filter film layer that transmits excitation light and reflects the received laser light needs to be provided on the layer structure where the first surface is located, so that the received laser light can be reflected and conducted to the first end surface.
  • the wavelength conversion layer of each wavelength conversion unit is a part of a continuum, and the light blocking sheet separates the high refractive index medium 321 b of each wavelength conversion unit.
  • This technical solution can be realized by surrounding the wavelength conversion layer on the outer surface of the cylindrical base 322 of the rotating cylinder 320.
  • the wavelength conversion layer 321a in this embodiment may be a layered structure in which phosphors are bonded with silica gel or epoxy resin, or a layered structure in which phosphors are bonded after softening / melting of glass powder, or a ceramic material and
  • the layered structure of the phosphor after co-sintering can also be a fluorescent single crystal.
  • the wavelength conversion material contained in the wavelength conversion layer 321a may be a single type of phosphor, or may include two or more types of phosphors to adjust the spectral characteristics of the emitted light.
  • FIG. 8 is a schematic structural diagram of a wavelength conversion unit of a light source device according to a modified embodiment of Embodiment 3 of the present invention.
  • the wavelength conversion unit 321 ' includes a wavelength conversion layer 321'a and a high refractive index medium 321b', wherein the wavelength conversion layer 321'a includes three wavelength conversion sublayers 321a'1, 321a'2, and 321a ' 3.
  • Each wavelength conversion sub-layer contains different phosphors respectively, and different wavelength conversion sub-layers are irradiated by the spots formed by the excitation photon beams at different positions, so as to adjust the emission light spectrum.
  • FIG. 9 is a schematic structural diagram of a light source device according to Embodiment 4 of the present invention.
  • the light source device 40 includes an excitation light source 410, a rotating cylinder 420, and a driving device 430.
  • the rotating cylinder 420 includes a cylindrical base 422, a wavelength conversion unit 421, and a heat sink 424.
  • the rotating cylinder 420 includes a plurality of wavelength conversion units 421, and the wavelength conversion units 421 are distributed along the circumferential direction on the side of the rotating cylinder.
  • the wavelength conversion unit 421 is located on the inner side rather than the outer side of the rotating cylinder 420, that is, the cylindrical base 422 surrounds the wavelength conversion unit 421 inside.
  • the cylindrical base 422 drives the wavelength conversion unit 421 to rotate around the central axis AX of the rotating cylinder 420.
  • the wavelength conversion unit 421 of this embodiment also includes a first surface 4211 and a second surface 4212 disposed oppositely, including a first end surface 4213 and a second end surface 4214 disposed oppositely, and two side surfaces connecting the first surface and the second surface .
  • the first surface 4211 is a light incident surface of the wavelength conversion unit, and is close to the central axis AX relative to the second surface 4212.
  • the first end surface 4213 is a light exit surface of the wavelength conversion unit.
  • the second surface 4212, the second end surface 4214, and the two side surfaces are reflective surfaces.
  • the excitation light L1 emitted by the excitation light source 410 in this embodiment is emitted radially outward from the inside of the rotating cylinder, so as to be incident on the wavelength conversion unit 421.
  • the received laser light generated by the wavelength conversion unit 421 is emitted from the first end surface in the axial direction.
  • the excitation light source 410 in the fourth embodiment includes a laser light source and a mirror array.
  • the excitation light source 410 in this embodiment can also be replaced by the excitation light source described in FIG. 1 or FIG. 4, but it should be noted that the internal space of the rotating cylinder 420 is limited, it is difficult to place the light source directly, and a light guide device such as a mirror can be used The excitation light L1 is guided into the interior of the rotating cylinder.
  • the wavelength conversion unit 421 is provided on the inner side of the rotating cylinder, it is difficult to arrange the heat sink on the same side. . It can be understood that the heat dissipation fins may be provided on the inside and outside of the cylindrical base body without affecting the optical path.

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Abstract

一种光源装置(10)，包括：激发光源（110）、旋转筒（120）和驱动装置（130）。激发光源（110），用于出射激发光（L1）；旋转筒（120）包括设置在侧面并沿周向分布的多个波长转换单元（121），波长转换单元（121）包括波长转换材料，用于吸收激发光（L1）并发出受激光（L2）；驱动装置（130）用于驱动旋转筒（120）绕中心轴旋转，以使多个波长转换单元（121）依时序依次位于激发光（L1）的光路上；激发光（L1）沿旋转筒（120）的径向入射至波长转换单元（121），受激光（L2）沿旋转筒（120）的轴向从波长转换单元（121）中出射。

Description

一种光源装置 技术领域
本发明涉及光学技术领域，特别是涉及一种光源装置。
背景技术
现有的照明光源主要为LED、氙灯和卤素灯光源，这几种光源分别有亮度不够高、使用寿命不够长、光束发散角较大导致照明距离不够远等缺点。作为新兴的照明技术，激光照明由于其亮度高、使用寿命长，且激光光束准直发散角小等特性，成为未来照明的发展趋势。
为了得到能够为照明、显示所用的白光，需要利用红绿蓝三色激光或者通过激光激发波长转换材料(如荧光粉)的方式。其中，红绿蓝三色激光获得的白光具有大色域范围、高亮度以及高成本，适于应用到高端显示领域。对于照明领域，红绿蓝三色激光覆盖的波长范围窄、显示指数低，并不实用。激光激发波长转换材料的方式获得的白光，同样具有高亮度的特性，而且相对于红绿蓝三色激光的方案更具有经济性，其瓶颈主要在于波长转换材料能否耐受住高功率密度的激光照射，波长转换材料在高温下容易发光效率下降。
在现有技术中的高亮度投影显示领域，有人利用激光激发旋转的荧光色轮获得高能量密度的荧光，以作为显示使用。该技术方案利用荧光色轮的旋转，避免了波长转换材料被高功率密度的激光连续照射，使得其产生的热量能够尽快发散。为了进一步提高出射的荧光功率密度，采用的荧光色轮直径越来越大，使得激光光源“小体积”的优势逐渐减小；另一方面，通过扩大激光在波长转换材料上的入射光斑大小来降低单位面积的激发光功率，无论是透射式色轮还是反射式色轮，出射光斑的面积大小都直接与入射光斑的面积相关(近似相等)，这使得出射光的光收集系统也随之尺寸变大，不利于紧凑型的结构设计。此外，通过扩大光斑面积带来的散热效果的提高是非线性的，光斑中心的热量越来越难 以发散出去，这导致散热收益递减，这种技术方案的亮度提高不具备可拓展性。
发明内容
针对上述现有技术的光源难以同时解决散热和高亮度的问题，本发明提供一种高亮度、小体积的光源装置，包括：激发光源，用于出射激发光；旋转筒，包括设置在其侧面并沿周向分布的多个波长转换单元，所述波长转换单元包括波长转换材料，用于吸收所述激发光并发出受激光，驱动装置，用于驱动所述旋转筒绕其中心轴旋转；所述激发光沿所述旋转筒的径向入射至所述波长转换单元，所述受激光沿所述旋转筒的轴向从所述波长转换单元中出射。
与现有技术相比，本发明包括如下有益效果：通过将波长转换单元设置在旋转筒的周侧，使激发光沿旋转筒的径向入射至波长转换单元，并使得受激光沿旋转筒的轴向从波长转换单元出射，使得激发光的入射光斑与受激光的出射光斑完全分离，从而可以在不改变出射光斑尺寸的情况下，任意扩大入射光斑的面积，以实现光源装置的高亮度和紧凑型结构。
在一个实施方式中，所述激发光入射至所述波长转换单元的入射光斑总面积大于所述受激光从所述波长转换单元出射的出射光斑总面积。该技术方案使得在激发光能量相同的情况下，出射光的光功率密度相较于常规的色轮方案更高。
在一个实施方式中，所述激发光包括子激发光束阵列，在所述波长转换单元表面形成沿所述旋转筒的轴向排布的入射子光斑阵列。该技术方案使得入射光斑在平行于旋转筒轴的方向的尺寸增大，大大增加了入射光斑总面积，使得波长转换单元的单位面积产热减少，有利于波长转换材料在较低温度下工作，从而具备更高的发光效率。
在一个实施方式中，所述激发光源包括子激发光源阵列，用于出射所述子激发光束阵列；或者所述激发光源包括激光光源和反射镜阵列，所述反射镜阵列包括平行设置的多个反射镜，且各反射镜沿远离所述激光光源的方向反射率逐渐增大、透射率逐渐减小，所述激光光源出射的激发光沿同一方向依次入射到所述反射镜阵列的各反射镜，经反射后形 成平行的所述子激发光束阵列。
在一个实施方式中，所述波长转换单元包括相对设置的第一表面和第二表面，相对设置的第一端面和第二端面，以及连接第一表面和第二表面的两个侧面；所述第一表面为所述波长转换单元的光入射面，所述第一表面平行于所述旋转筒的中心轴，所述第一端面为所述波长转换单元的光出射面，所述第一端面垂直于所述旋转筒的中心轴，所述第一端面的面积小于所述第一表面，所述第二表面和第二端面均为光反射面。
在一个实施方式中，所述第一表面设置有透射所述激发光并反射所述受激光的滤光膜层。该技术方案有利于提高激发光利用率，并确保受激光全部由异于光入射面的光出射面出射。
优选地，第一表面设置角度选择膜层，透射入射角小于预设角度的激发光，反射受激光以及入射角大于预设角度的激发光。该技术方案使得波长转换单元能够出射激发光与受激光的混合光。
在一个实施方式中，所述波长转换单元包括波长转换层，靠近所述第二表面设置，所述波长转换层与所述第一表面之间为空腔或者高折射率介质。
在一个实施方式中，各所述波长转换单元的波长转换层为一连续体的一部分。
在一个实施方式中，所述波长转换单元包括荧光单晶，所述第一表面和所述第二表面为所述荧光单晶的两个相对的表面。
在一个实施方式中，还包括挡光片，设置在相邻的所述波长转换单元的侧面之间，所述挡光片具有光反射属性。
在一个实施方式中，还包括光收集装置，设置于所述受激光的出射光路上，所述光收集装置包括匀光棒、复合抛物面聚光器或收光透镜，所述光收集装置的入射面面积大于两倍的所述第一端面面积。当入射光斑照射到相邻的两个波长转换单元的连接处时，两个波长转换单元都会发光，该技术方案确保了即使该情况下，光收集装置仍能够将波长转换单元发出的光尽可能多的收集到后方光路。
在一个实施方式中，所述旋转筒还包括筒状基体，所述波长转换单元环绕所述筒状基体设置，所述筒状基体的空腔内设置有散热片。该技 术方案利用旋转筒的内部空间形成散热通道。进一步地，散热片呈涡轮排布，带动空气气流单向流动，形成一种自散热结构，提高了散热效果。
附图说明
图1为本发明实施例一的光源装置的结构示意图。
图2为图1所示光源装置的旋转筒的横截面图。
图3为不同时段下旋转筒与激发光的位置关系示意图。
图4为本发明实施例二的光源装置的结构示意图。
图5为本发明实施例二的变形实施例的光源装置的结构示意图。
图6为本发明实施例三的光源装置的结构示意图。
图7为图6所示光源装置的旋转筒的横截面图。
图8为本发明实施例三的变形实施例的光源装置的波长转换单元的
结构示意图。
图9为本发明实施例四的光源装置的结构示意图。
具体实施方式
下面结合附图和实施方式对本发明实施例进行详细说明。
请参见图1，为本发明实施例一的光源装置的结构示意图。光源装置10包括激光光源110、旋转筒120和驱动装置130。其中，激光光源110出射激发光L1，激发光L1沿着旋转筒120的径向照射在旋转筒120的侧表面。驱动装置130连接在旋转筒120上，驱动旋转筒120绕其中心轴AX旋转，以使旋转筒120的不同区域被激发光L1照射，驱动装置130具体包括马达和连接马达与旋转筒120的连接部。
旋转筒120包括设置在其侧面并沿着周向分布的多个波长转换单元121。在驱动装置130的驱动下，波长转换单元依时序依次位于激发光L1的光路上。波长转换单元121包括波长转换材料，入射至波长转换单元的激发光L1至少部分被吸收，被转换为受激光L2出射。受激光L2沿着旋转筒120的轴向(及AX轴方向)从波长转换单元121中出射。
可以看出，波长转换单元121的光入射面与光出射面为不同的两个面，出射的受激光L2相对于原入射的激发光L1改变了90°的方向(可 以理解，“沿轴向”和“沿径向”并非严格的沿着该方向，在误差范围内的光束角度也在本发明的保护范围内，例如偏离径向或轴向±5°范围内)，这使得入射光斑的总面积与出射光斑的总面积的尺寸没有必然的联系。不像色轮方案，无论是反射式色轮还是透射式色轮，出射光斑的面积总是与入射光斑的面积相近。这使得本发明的技术方案具有更高的设计自由度，可以根据出射光的亮度需求和后方光路器件的尺寸要求，分别设计不同的入射面面积和出射面面积，得到所需的光束。
在本实施例中，激发光L1入射至波长转换单元121的入射光斑总面积大于受激光L2从波长转换单元121中出射的出射光斑总面积，能够提高出射光的光功率密度。
本发明的重点在于旋转筒的结构，以及旋转筒的光入射面和光出射面的关系。下面对本实施例的旋转筒120的结构做进一步详细描述。
请结合图1与图2，图2为图1所示光源装置的旋转筒的横截面图，两图的标号可以互相参照。如图1和图2所示，沿着旋转筒120的侧面，周向排布着16个波长转换单元(可以理解，本实施例以16个作为举例，并不限制波长转换单元的数量)。本实施例中，各波长转换单元的尺寸相同。
波长转换单元121包括相对设置的第一表面1211和第二表面1212，包括相对设置的第一端面1213和第二端面1214，以及连接第一表面和第二表面的两个侧面1215和1216。
其中，第一表面1211为波长转换单元121的光入射面，第一表面1211平行于旋转筒120的中心轴AX，与第一表面1211相对的第二表面1212为光反射面(如镜面反射面、漫反射面)，以避免激发光直接出射。第一端面1213为波长转换单元的光出射面，第一端面1213垂直于旋转筒的中心轴AX，与第一端面1213相对的第二端面1214为光反射面(如镜面反射面、漫反射面)，以使受激光L2从第一端面1213出射。第一表面1211在沿中心轴AX的方向具有较大的尺寸，使得第一表面1211的面积大于第一端面1213。
在本实施例中，第一表面1211进一步包括滤光膜层1211a，用于透射激发光并反射受激光。该滤光膜层1211a确保受激光不会从第一表面 1211出射，使得受激光集中于小面积的第一端面1213出射。
在本实施例的进一步的实施方式中，滤光膜层1211a可以优化为角度滤光膜片，透射入射角小于预设角度(如5°)的激发光，反射受激光以及入射角大于预设角度(如5°)的激发光。更进一步地，滤光膜片1211a可以为0°角度滤光膜片，仅透射垂直入射的激发光，反射其他角度的激发光并反射全部受激光。该技术方案使得出射光不仅包含受激光，还能够包含激发光，在激发光为蓝光的情况下，能够结合黄色波长转换材料得到蓝光与黄光的混合光作为出射光，从而得到白光。
本实施例中，在相邻的各波长转换单元的侧面之间，还设置有挡光片123，挡光片123具有光反射属性，使得入射到波长转换单元的侧面1215和1216的光被反射回波长转换单元121内部。挡光片可以为镀有高反射膜层的玻璃或蓝宝石，或者可以为漫反射材料层，还可以为直接镀在波长转换单元侧面的反射膜层(如银、铝等金属反射层或介质膜反射层)，将各波长转换单元分隔开来。当挡光片123可以通过插在凹槽中实现固定，或者通过胶粘的方式固定。
本实施例中的激发光源可以为激光光源或LED光源，既可以是单颗的光源，也可以是多颗光源的组合阵列。本实施例不对激发光源做进一步描述，在下述各实施方式中将列举一些激发光源的实施方式。
本实施例中的波长转换单元121的波长转换材料为荧光单晶，波长转换单元121的内部主体结构即为荧光单晶，第一表面1211和第二表面1212分别为荧光单晶的两个相对的表面。滤光膜层1211a直接镀制在荧光单晶的第一表面1211上。
荧光单晶可以是例如Ce:YAG单晶，能够吸收蓝光并发出黄光。其呈透明或半透明状，使得光束可以在其内部传导，最终通过第一端面1213出射。
本实施例中，环绕旋转筒120的各波长转换单元都是相同的荧光单晶，那么该光源装置出射单一光谱的光。可以理解，在本发明的其他实施方式中，也可以环绕旋转筒设置不同类型的波长转换单元，以在不同时段出射不同光谱的光。
本实施例的光源装置10还包括光收集装置140，设置在受激光L2 的出射光路上。本实施例的光收集装置140为收光透镜组成的透镜组。
经过分析可以得知，本发明的出射光斑位置不是恒定不变的。请参见图3，为不同时段下旋转筒120与激发光L1的位置关系。如图3所示，旋转筒顺时针旋转，从左往右T1→T2→T3→T4按照时间依次排列。其中，斜线标出的波长转换单元的端面对应出射光斑。可以看出，出射光斑的位置在不断变化，当激发光L1照射在相邻的两个波长转换单元之间时，激发光同时进入两个波长转换单元内，使得出射光斑的面积扩大为两倍。但是，无论出射光斑的位置和面积如何变化，都在图中所示的虚线框内做周期性变化。
为了确保光收集装置能够将出射光斑完全收集，需要使得光收集装置的入射面面积至少大于两倍的第一端面面积。对于本实施例的收光透镜而言，光收集装置的入射面面积即为收光透镜在其物平面位置能够收集到的光斑面积。
本实施例的旋转筒120还包括筒状基体122，用于承载波长转换单元121，波长转换单元121环绕筒状基体122设置。
本实施例的旋转筒120进一步包括散热片124，设置在筒状基体122的空腔内。散热片呈涡轮排布，带动空气气流单向流动，形成一种自散热结构，提高了散热效果。可以理解，散热片124并非本发明光源装置的必要结构，也可以不设置散热片。
在实施例一中，激发光源110作为一个整体向旋转筒120的波长转换单元出射激发光L1。在本发明中，激发光源可以是一个光源，也可以由包含多个光源的光源阵列组成。
请参见图4，为本发明实施例二的光源装置的结构示意图，光源装置20包括激发光源210、旋转筒220、驱动装置230和光收集装置240。与图1所示的实施例一的结构的不同之处在于，本实施例中，激发光源210包括子激发光源阵列，用于出射子激发光束阵列，子激发光束阵列组成激发光，在波长转换单元表面形成沿着旋转筒220的轴向排布的入射子光斑阵列。即本实施例的激发光源210包括多个子激发光源211，不同的子激发光源211分别在旋转筒220表面形成入射光斑，使得入射光斑的总面积大大增加，不必使得能量过于集中于一个光斑而导致波长 转换材料超负荷。在本实施例中，可以独立的控制开启的子激发光源211的数量来控制输出光的亮度。与此同时，做出波长转换单元的光输出面，其出射光斑的总面积大小不随入射光斑面积而改变，能够确保不需要调整光收集装置的尺寸。
在本实施例中，不同的子激发光源可以具有不同的激发光光谱范围。
在图4所示的实施例二中，另一个不同之处在于，本实施例的光收集装置240包括匀光棒，该匀光棒具体地为一锥棒，入射面面积小于出射面面积。该匀光棒一方面用于对波长转换单元的出射光进行匀光，一方面减小波长转换单元的出射光的发散角。与图1所示实施例一相同，为了使得光收集装置240能够收集到波长转换单元出射的大部分光，需要使得光收集装置240的入射面面积大于两倍的波长转换单元的第一端面面积。在本实施例中，具体地，需要使匀光棒的入射面面积大于波长转换单元的第一端面的面积的两倍。
本实施例二中的旋转筒220、驱动装置230的结构可以参照实施例一中的旋转筒120、驱动装置130的描述，此处不再赘述。
请参见图5，为本发明图4所示的实施例二的变形实施例的光源装置的结构示意图。光源装置20’包括激发光源210’、旋转筒220’、驱动装置230’和光收集装置240’。
本实施例与实施例二的区别具体为激发光源210’和光收集装置240’不同。
本实施例中，虽然激发光源210’出射的激发光也由子激发光束阵列组成，但是获取方式与实施例二不同。本实施例中的激发光源210’包括激光光源211’和反射镜阵列212’，其中，反射镜阵列212’包括平行设置的多个反射镜，且各反射镜沿远离激光光源211’的方向反射率逐渐增大、透射率逐渐减小，激光光源211’出射的激发光沿同一方向依次入射到反射镜阵列212’的各反射镜，部分透射、部分反射，最终形成平行出射的子激发光束阵列。该技术方案相较于实施例二的技术方案，激发光源具有更高的位置设计灵活度，可以获得排列更密集的入射子光斑阵列，无需受到相邻激光器的间距要求的限制。本实施例可以采用一个大功率激光器提供激发光，经过反射镜阵列得到子激发光束阵列。
本实施例中的激光光源设置在远离受激光出口的位置，可以理解，在本发明的其他实施方式中，激光光源也可以设置在靠近受激光出口的一侧，以实现光路的折叠而实现紧凑型结构设计。
本实施例中，光收集装置240’将实施例二中的光收集装置240的匀光棒替换为复合抛物面聚光器，该复合抛物面聚光器的入口靠近波长转换单元的第一端面，以实现对受激光L2的收集。同样地，为了使得光收集装置240’能够收集到波长转换单元出射的大部分光，需要使得光收集装置240’的入射面面积大于两倍的波长转换单元的第一端面面积。在本实施例中，具体地，需要使复合抛物面聚光器的入口面积大于波长转换单元的第一端面的面积的两倍。
上述列举的光收集装置包括匀光棒、复合抛物面聚光器和收光透镜，该类结构可以在本发明的各实施方式中任意相互替换或组合使用。
图5所示的实施例中的旋转筒220’、驱动装置230’的结构可以参照实施例一中的旋转筒120、驱动装置130的描述，此处不再赘述。
上述实施例中，列举了波长转换单元包括荧光单晶的技术方案，接下来，将对另一种波长转换单元进行描述。
请参见图6和图7，图6为本发明实施例三的光源装置的结构示意图，图7为图6所示光源装置的旋转筒的横截面图。
实施例三中，光源装置30包括激发光源310、旋转筒320、驱动装置330和光收集装置340。其中，激发光源310可以参照上述各实施例中的激发光源110、210或210’的描述，驱动装置330可以参照驱动装置130的描述，光收集装置340可以参照上述各实施例中的光收集装置的描述，此处不再赘述。
本实施例中，旋转筒320包括筒状基体322和设置在旋转筒320侧面并沿周向分布的多个波长转换单元321。波长转换单元321包括相对设置的第一表面3211和第二表面3212，包括相对设置的第一端面3213和第二端面3214，以及连接第一表面和第二表面的两个侧面。第一表面为波长转换单元的光入射面，第一端面为波长转换单元的光出射面，第一表面的面积大于第一端面的面积。
波长转换单元321包括波长转换层321a和高折射率介质321b(折 射率大于等于1.6的介质，如玻璃、蓝宝石等)，其中，波长转换层321a靠近第二表面3212设置，波长转换层321a与第一表面3211之间为高折射率介质321b。激发光L1通过第一表面3211进入波长转换单元321后，穿过高折射率介质321b到达波长转换层321a，至少部分被吸收后，波长转换层321a出射受激光L2。受激光L2在高折射率介质321b内反射传导，到达第一端面3213，而后出射。本实施例中，可以利用高折射率介质321b与外界空气的折射率差，使大角度入射至第一表面的受激光全反射，也可以额外在第一表面设置滤光膜层以确保受激光的反射传导。
在实施例三的一个变形实施例中，高折射率介质321b也可以替换为空腔，该技术方案中，需要在第一表面额外设置一个层结构，例如玻璃层。进一步地，需要在第一表面所在的层结构上设置透射激发光并反射受激光的滤光膜层，以使受激光能够反射传导至第一端面。
在本实施例中，如图7所示，各波长转换单元的波长转换层为一连续体的一部分，挡光片将各个波长转换单元的高折射率介质321b分隔开。该技术方案可以在旋转筒320的筒状基体322外表面环绕波长转换层实现。
本实施例中的波长转换层321a可以为硅胶或环氧树脂粘结荧光粉成层的结构，也可以为玻璃粉通过软化/熔融后粘结荧光粉成层的结构，还可以为陶瓷材料与荧光粉共烧结后成层的结构，还可以为荧光单晶。
波长转换层321a内所含有的波长转换材料可以为单一种类的荧光粉，也可以包含两种或两种以上的荧光粉，以实现对出射光光谱特性的调节。
请参见图8，为本发明实施例三的变形实施例的光源装置的波长转换单元的结构示意图。如图所示，波长转换单元321’包括波长转换层321’a和高折射率介质321b’，其中，波长转换层321’a包括三个波长转换子层321a’1、321a’2和321a’3，各波长转换子层分别含有不同的荧光粉，通过不同位置的激发光子光束形成的光斑对不同的波长转换子层进行照射，以实现对出射光光谱的调节。
请参见图9，为本发明实施例四的光源装置的结构示意图。光源装置40包括激发光源410、旋转筒420和驱动装置430。其中，旋转筒420 包括筒状基体422、波长转换单元421和散热片424，旋转筒420包括多个波长转换单元421，波长转换单元421在旋转筒的侧面沿着周向分布设置。
与上述各实施方式的不同之处在于，本实施例中，波长转换单元421位于旋转筒420的内侧面而非外侧面，即筒状基体422将波长转换单元421包围在内部。在驱动装置430的驱动下，筒状基体422带动波长转换单元421绕旋转筒420的中心轴AX转动。
本实施例的波长转换单元421同样包括相对设置的第一表面4211和第二表面4212，包括相对设置的第一端面4213和第二端面4214，以及连接第一表面和第二表面的两个侧面。其中，第一表面4211为波长转换单元的光入射面，相对于第二表面4212靠近中心轴AX。第一端面4213为波长转换单元的光出射面。第二表面4212和第二端面4214以及两个侧面为反射面。
本实施例中的激发光源410发出的激发光L1从旋转筒的内部沿径向向外出射，从而入射到波长转换单元421上。波长转换单元421产生的受激光沿轴向从第一端面出射。
本实施例四中的激发光源410包括激光光源与反射镜阵列，具体结构可以参照图5所示的实施例的描述。本实施例中的激发光源410也可以替换采用图1或图4所述的激发光源，但需要注意的是，旋转筒420的内部空间有限，难以直接放置光源，可以采用反射镜等光引导装置将激发光L1引导进入旋转筒的内部。
本实施例四中，由于波长转换单元421设置在旋转筒的内侧面，因此散热片难以同样设置在内侧，本实施例中的散热片424设置在筒状基体422的外侧，用于提高散热效果。可以理解，在不影响光路的情况下，上述各种实施方式都可以在筒状基体的内外侧设置散热片。
本实施例四中的波长转换单元421的具体材料、结构可以参考上述各实施方式中的描述，此处不再赘述。
本说明书中各个实施例采用递进的方式描述，每个实施例重点说明的是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。
以上所述仅为本发明的实施方式，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 (12)

  1. 一种光源装置，其特征在于，包括：
    激发光源，用于出射激发光；
    旋转筒，包括设置在其侧面并沿周向分布的多个波长转换单元，所述波长转换单元包括波长转换材料，用于吸收所述激发光并发出受激光；
    驱动装置，用于驱动所述旋转筒绕其中心轴旋转，以使所述多个波长转换单元依时序依次位于所述激发光的光路上；
    所述激发光沿所述旋转筒的径向入射至所述波长转换单元，所述受激光沿所述旋转筒的轴向从所述波长转换单元中出射。
  2. 根据权利要求1所述的光源装置，其特征在于，所述激发光入射至所述波长转换单元的入射光斑总面积大于所述受激光从所述波长转换单元出射的出射光斑总面积。
  3. 根据权利要求1或2所述的光源装置，其特征在于，所述激发光包括子激发光束阵列，在所述波长转换单元表面形成沿所述旋转筒的轴向排布的入射子光斑阵列。
  4. 根据权利要求3所述的光源装置，其特征在于，所述激发光源包括子激发光源阵列，用于出射所述子激发光束阵列；或者
    所述激发光源包括激光光源和反射镜阵列，所述反射镜阵列包括平行设置的多个反射镜，且各反射镜沿远离所述激光光源的方向反射率逐渐增大、透射率逐渐减小，所述激光光源出射的激发光沿同一方向依次入射到所述反射镜阵列的各反射镜，经反射后形成平行的所述子激发光束阵列。
  5. 根据权利要求1或2所述的光源装置，其特征在于，所述波长转换单元包括相对设置的第一表面和第二表面，相对设置的第一端面和第二端面，以及连接第一表面和第二表面的两个侧面；
    所述第一表面为所述波长转换单元的光入射面，所述第一表面平行于所述旋转筒的中心轴，所述第一端面为所述波长转换单元的光出射面，所述第一端面垂直于所述旋转筒的中心轴，所述第一端面的面积小于所述第一表面，所述第二表面和第二端面均为光反射面。
  6. 根据权利要求5所述的光源装置，其特征在于，所述第一表面设置有透射所述激发光并反射所述受激光的滤光膜层。
  7. 根据权利要求5所述的光源装置，其特征在于，所述波长转换单元包括波长转换层，靠近所述第二表面设置，所述波长转换层与所述第一表面之间为空腔或者高折射率介质。
  8. 根据权利要求7所述的光源装置，其特征在于，各所述波长转换单元的波长转换层为一连续体的一部分。
  9. 根据权利要求5所述的光源装置，其特征在于，所述波长转换单元包括荧光单晶，所述第一表面和所述第二表面为所述荧光单晶的两个相对的表面。
  10. 根据权利要求5所述的光源装置，其特征在于，还包括挡光片，设置在相邻的所述波长转换单元的侧面之间，所述挡光片具有光反射属性。
  11. 根据权利要求5所述的光源装置，其特征在于，还包括光收集装置，设置于所述受激光的出射光路上，所述光收集装置包括匀光棒、复合抛物面聚光器或收光透镜，所述光收集装置的入射面面积大于两倍的所述第一端面面积。
  12. 根据权利要求1或2所述的光源装置，其特征在于，所述旋转筒还包括筒状基体，所述波长转换单元环绕所述筒状基体设置，所述筒状基体的空腔内设置有散热片。
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1327689A (zh) * 1999-10-08 2001-12-19 Lg电子株式会社 圆柱形彩色轮及其制造方法和采用它的投影仪
CN107250909A (zh) * 2015-02-20 2017-10-13 株式会社理光 照明装置和图像投影设备
CN107479310A (zh) * 2016-06-07 2017-12-15 海信集团有限公司 波长转换装置及投影光源
CN207488691U (zh) * 2017-06-29 2018-06-12 无锡视美乐激光显示科技有限公司 一种能够同时保证亮度与色域的动态波长转换装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011216430A (ja) * 2010-04-02 2011-10-27 Seiko Epson Corp 光源装置及びプロジェクター
JP5656058B2 (ja) * 2010-08-24 2015-01-21 カシオ計算機株式会社 発光ユニット及びプロジェクタ
CN103189794B (zh) * 2010-10-19 2015-07-29 Nec显示器解决方案株式会社 照明设备以及使用其的投影型显示设备
CN202660469U (zh) * 2012-04-27 2013-01-09 朴贤卿 发光波长转换装置及发光装置
JP2019003760A (ja) * 2017-06-13 2019-01-10 株式会社ライトショー・テクノロジー 光源装置および投射型表示装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1327689A (zh) * 1999-10-08 2001-12-19 Lg电子株式会社 圆柱形彩色轮及其制造方法和采用它的投影仪
CN107250909A (zh) * 2015-02-20 2017-10-13 株式会社理光 照明装置和图像投影设备
CN107479310A (zh) * 2016-06-07 2017-12-15 海信集团有限公司 波长转换装置及投影光源
CN207488691U (zh) * 2017-06-29 2018-06-12 无锡视美乐激光显示科技有限公司 一种能够同时保证亮度与色域的动态波长转换装置

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