WO2023221577A1 - 激光波长转换装置及投影仪 - Google Patents

激光波长转换装置及投影仪 Download PDF

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Publication number
WO2023221577A1
WO2023221577A1 PCT/CN2023/076465 CN2023076465W WO2023221577A1 WO 2023221577 A1 WO2023221577 A1 WO 2023221577A1 CN 2023076465 W CN2023076465 W CN 2023076465W WO 2023221577 A1 WO2023221577 A1 WO 2023221577A1
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WO
WIPO (PCT)
Prior art keywords
light
collimated
conversion device
wavelength conversion
reflective
Prior art date
Application number
PCT/CN2023/076465
Other languages
English (en)
French (fr)
Inventor
万安
林合山
彭柏崴
Original Assignee
深圳海翼智新科技有限公司
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Application filed by 深圳海翼智新科技有限公司 filed Critical 深圳海翼智新科技有限公司
Publication of WO2023221577A1 publication Critical patent/WO2023221577A1/zh

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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
    • G03B21/2006—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • 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
    • 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
    • G03B21/206—Control of light source other than position or intensity
    • 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

Definitions

  • the present application relates to the field of lasers, and in particular, to a laser wavelength conversion device and a projector.
  • the wavelength converter usually has a phosphor layer. After the phosphor layer is excited by the excitation light, it emits a laser line.
  • the laser line is usually collected using a condenser lens. Since the temperature of the wavelength converter is relatively high during operation, the The phosphor layer and the lens often need to be spaced apart, resulting in part of the laser line being unable to be collected by the condenser lens, reducing the light extraction efficiency.
  • Embodiments of the present application provide a laser wavelength conversion device and a projector, which can solve the problem of low light extraction efficiency.
  • embodiments of the present application provide a laser wavelength conversion device, including a wavelength converter, a reflective cup, a light source and a lens.
  • a reflective cup is arranged around the periphery of the wavelength converter, and the reflective cup has a light outlet corresponding to the wavelength converter; a light source is configured to emit excitation light; and a lens is configured corresponding to the light source; wherein, the The lens and the light source are both located in the external space of the reflective cup.
  • the excitation light emitted by the light source reaches the lens, is condensed by the lens to form collimated incident light, and is projected to the wavelength converter.
  • the wavelength converter excites the collimated incident light to form laser light, which is reflected by the inner wall surface of the reflective cup to form collimated outgoing light and is emitted from the light outlet of the reflective cup.
  • a first light hole is opened on the inner wall surface, and the collimated incident light passes through the first light hole and is projected to the wavelength converter.
  • the laser wavelength conversion device further includes a beam splitter located in an external space of the reflective cup, and the beam splitter is configured to change the propagation direction of the collimated incident light so that the collimated incident light
  • the direct incident light can reach the wavelength converter, and/or the light splitter is configured to change the propagation direction of the collimated outgoing light, so that the collimated outgoing light avoids the light outlet and emits the laser wavelength conversion device.
  • the light splitting member includes a first reflective member, and the collimated incident light is projected to the wavelength converter after being reflected by the first reflective member.
  • the light splitting member includes a second reflective member, the second reflective member is disposed corresponding to the light outlet, and after the collimated outgoing light is reflected by the second reflective member, it avoids all The light outlet emits the laser wavelength conversion device.
  • the light splitting member includes a third reflective member, the third reflective member is disposed corresponding to the light outlet, the third reflective member is provided with a second light hole, and the collimator The direct incident light passes through the second light hole and is projected to the wavelength converter. After the collimated outgoing light is reflected by the third reflective member, it prevents the light outlet from emitting from the laser wavelength conversion device.
  • the light splitting element includes a first light splitting filter, the first light splitting filter is disposed corresponding to the light outlet, and the collimated incident light transmits the first light splitting filter. Projected to the wavelength converter, the collimated outgoing light is reflected by the first dichroic filter and prevents the light outlet from emitting from the laser wavelength conversion device.
  • the beam splitter includes a second splitting filter, and the collimated incident light is projected to the wavelength converter after being reflected by the second splitting filter. After the emitted light is transmitted through the second spectroscopic filter, it is emitted from the laser wavelength conversion device.
  • projecting the collimated incident light to the wavelength converter includes: projecting the collimated incident light directly to the wavelength converter, or projecting the collimated incident light through the interior of the reflective cup.
  • the wall reflects to the wavelength converter.
  • the laser wavelength conversion device further includes a heat dissipation device connected to the wavelength converter and configured to cool the wavelength converter.
  • the inner wall surface of the reflective cup is a curved surface, configured to reflect the laser light, and cause the laser light to form a parallel collimated light emitted from the light outlet. Reflective cup.
  • embodiments of the present application provide a projector, including a laser wavelength conversion device and a lens assembly as described in any of the above embodiments, and the lens assembly is installed on the light exit side of the laser wavelength conversion device.
  • the collimated light emitted from the laser wavelength conversion device enters the lens assembly.
  • the excitation light emitted by the light source in the embodiment of the present application is collimated by the lens and then projected to the wavelength converter, so that most of the excitation light can be incident on the wavelength converter, reducing the incident loss of the excitation light.
  • the reflective cup can collimate the received laser light.
  • the received laser light only needs to be reflected once by the inner wall of the reflective cup before being emitted from the light outlet, reducing the energy loss caused by multiple reflections of the reflective cup, and the wavelength converter is used in the reflective At the bottom of the cup, all the received laser light passes through the light outlet of the reflective cup and is emitted into the optical system to improve the light extraction efficiency.
  • the wavelength converter is located in the internal space of the reflective cup, and the light source and lens are located in the external space of the reflective cup, making the optical path of the entire device unobstructed and preventing the optical path from being affected by improper installation of structural parts. generated, reducing optical loss.
  • Figure 1 is a schematic structural diagram of a laser wavelength conversion device in an embodiment of the present application
  • Figure 2 is a schematic structural diagram of a reflective cup with a first light hole in an embodiment of the present application
  • Figure 3 is a schematic structural diagram of the first reflective member corresponding to the light source in an embodiment of the present application
  • Figure 4 is a schematic structural diagram of the second reflective member corresponding to the light outlet in an embodiment of the present application.
  • Figure 5 is a schematic structural diagram of the first reflective member corresponding to the light source and the second reflective member corresponding to the light outlet in an embodiment of the present application;
  • Figure 6 is a schematic structural diagram of the third reflective member corresponding to the light outlet in an embodiment of the present application.
  • Figure 7 is a schematic structural diagram of the first spectroscopic filter corresponding to the light outlet in an embodiment of the present application.
  • Figure 8 is a schematic structural diagram of the second spectroscopic filter corresponding to the light outlet in an embodiment of the present application.
  • Figure 9 is a schematic structural diagram of the third reflective member corresponding to the light outlet in another embodiment of the present application.
  • Figure 10 is a schematic structural diagram of the first spectroscopic filter corresponding to the light outlet in another embodiment of the present application.
  • Figure 11 is a schematic structural diagram of the second spectroscopic filter corresponding to the light outlet in another embodiment of the present application.
  • Figure 12 is a schematic structural diagram of a projector in an embodiment of the present application.
  • 100 laser wavelength conversion device; 110, reflective cup; 110a, first light hole; 120, wavelength converter; 130, light source; 140, lens; 151, first reflective member; 151a, first Reflective surface; 152, second reflective member; 152a, second reflective surface; 153, third reflective member; 153a, second light hole; 153b, third reflective surface; 154, first dichroic filter; 154a, First transmission surface; 154b, fourth reflection surface; 155, second spectroscopic filter; 155a, second transmission surface; 155b, fifth reflection surface; 160, heat dissipation device; 170a, collimated incident light; 170b, collimation Emitted light; 200, projector; 210, lens assembly.
  • an embodiment of the present application provides a laser wavelength conversion device 100 .
  • the laser wavelength conversion device 100 includes a reflective cup 110 , a wavelength converter 120 , a light source 130 and a lens 140 .
  • the light source 130 is configured to emit excitation light
  • the lens 140 is configured corresponding to the light source 130.
  • the excitation light generated by the light source 130 is condensed by the lens 140 to form collimated incident light 170a, and is projected to the wavelength converter 120.
  • the lens 140 can be a plano-convex lens or a meniscus lens. The plano-convex lens or the meniscus lens collimates the incident excitation light, so that more of the excitation light can illuminate the wavelength converter 120 and reduce the optical loss of the excitation light.
  • the wavelength converter 120 includes a phosphor layer, which may be a single-color phosphor or a dual-color phosphor.
  • the phosphor layer is configured to absorb and convert the collimated incident light 170a into laser light. For example, when the light source 130 emits blue excitation light, the blue excitation light is projected to the phosphor layer of the wavelength converter 120 and is excited by the phosphor layer to generate laser light including mixed red light, green light or other wavelengths.
  • the reflective cup 110 is arranged around the wavelength converter 120 , and has a light outlet corresponding to the wavelength converter 120 .
  • the lens 140 and the light source 130 can both be disposed in the external space of the reflective cup 110 .
  • the collimated incident light 170a can enter the internal space of the reflective cup 110 from the light outlet and be projected to the wavelength converter 120.
  • the wavelength converter 120 excites the collimated incident light 170a to form a laser beam, and the laser beam is reflected by the inner wall of the reflective cup 110 to form a collimated laser beam.
  • the emitted light 170b, the collimated emitted light 170b exits the reflective cup 110 through the light outlet of the reflective cup 110.
  • the inner wall surface of the reflective cup 110 has a collimating effect on the reflected light. For example, it can reflect the laser light so that it can be reflected from the inner wall surface of the reflective cup 110 and emit from the light outlet to prevent the laser light from being trapped in the reflective cup 110. Multiple reflections cause greater light loss, thereby reducing the output efficiency.
  • the inner wall surface can be coated to improve the reflection effect of the inner wall surface.
  • the embodiment of the present application collects the received laser light through the reflective cup 110.
  • the reflective cup 110 collects the received laser light more efficiently and the brightness of the received laser light is higher.
  • the lens 140 in the embodiment of the present application has a collimating effect, which can make the received laser light reflect from the reflective cup 110 once and then exit from the light outlet, thereby reducing the energy loss caused by multiple reflections by the reflective cup 110, and the wavelength converter 120
  • the wavelength converter 120 At the bottom of the reflective cup 110, all the laser light passes through the mouth of the reflective cup 110 and is emitted into the optical system, which reduces the light loss of the laser light and improves the emission efficiency of the laser light.
  • the lens 140 in the embodiment of the present application can collimate the excitation light emitted by the light source 130, so that most of the excitation light is incident on the wavelength converter 120, reducing the optical loss of the excitation light and improving the incident efficiency of the excitation light.
  • the wavelength converter 120 is located in the internal space of the reflective cup 110, and the light source 130 and the lens 140 are located in the external space of the reflective cup 110, making the light path of the entire device unobstructed, preventing the light path from being affected by improper installation of structural parts, and reducing light loss. .
  • a first light hole 110a is opened on the inner wall surface, and the collimated incident light 170a is also The first light hole 110a can be penetrated into the internal space of the reflective cup 110 and projected to the wavelength converter 120.
  • the aperture of the first light hole 110a can be set equal to the outer diameter of the collimated incident light beam 170a, so that the collimated incident light 170a can completely pass through the first light hole 110a, and the diameter of the first light hole 110a can be reduced as much as possible.
  • the aperture allows most of the received laser light to be reflected, while a small proportion of the received laser light is transmitted through the first light hole 110a, thereby reducing light loss.
  • the specific optical path of the laser wavelength conversion device 100 is as follows: the light source 130 emits excitation light. After the excitation light is collimated by the lens 140, it becomes collimated incident light 170a. The collimated incident light 170a passes through the side wall of the reflective cup 110. After the first light hole 110a, it is projected to the wavelength converter 120. The wavelength converter 120 converts the excitation light irradiated thereon into the laser light. The laser light is scattered to the collimated reflective cup 110 and passes through the reflective cup 110. After reflection from the inner wall surface, it is emitted from the light outlet to form collimated emitted light 170b, which is emitted from the laser wavelength conversion device 100.
  • the laser wavelength conversion device 100 further includes a beam splitter located in an external space of the reflective cup 110 .
  • the beam splitter is configured to change the propagation direction of the collimated incident light 170a, so that the collimated incident light 170a can reach the wavelength converter 120, and/or, the beam splitter is configured to change the propagation direction of the collimated outgoing light 170b, so that the collimated outgoing light 170b can be collimated.
  • 170b avoids the light outlet and emits the laser wavelength conversion device 100 .
  • the light splitter can change the incident angle of the collimated incident light 170a to make the position arrangement of the light source 130 more flexible; or the light splitter can change the exit angle of the collimated outgoing light 170b to make the position arrangement of the preset light receiving device more flexible; and Or the light splitter can change the incident angle of the collimated incident light 170a and the exit angle of the collimated outgoing light 170b at the same time, so as to take into account the above advantages.
  • the light-receiving device can be the LCD panel of the projector or the slide film.
  • the light splitting element includes a first reflective element 151.
  • the first reflective element 151 has a first reflective surface 151a.
  • the collimated incident light 170a is reflected by the first reflective surface 151a and then projected to the wavelength converter. 120.
  • the first reflective member 151 and the light source 130 may be located on the same side of the reflective cup 110 , or may be located on different sides of the reflective cup 110 .
  • the first reflective member 151 can optionally be disposed in the external space of the reflective cup 110 to prevent blocking of the laser beam and affecting the light extraction efficiency of the laser beam.
  • the first reflecting member 151 may specifically be a reflector or the like.
  • the light source 130 cooperates with the first reflective member 151.
  • the collimated incident light 170a at the incident angle can be reflected to the wavelength converter 120, thereby making the position setting of the light source 130 more flexible.
  • the laser wavelength conversion device 100 should be installed in a projector, and the light sources 130 can be installed at multiple positions in the internal space of the projector, thereby leaving more space for other components and reducing the difficulty of arranging other components.
  • the specific optical path of the laser wavelength conversion device 100 is as follows: the light source 130 emits excitation light. After the excitation light is collimated by the lens 140, it becomes collimated incident light 170a. The collimated incident light 170a is reflected by the first reflective surface 151a. Projected to the wavelength converter 120, the wavelength converter 120 converts the excitation light irradiated thereon into the laser light, and the laser light is scattered to On the collimated reflective cup 110, the laser wavelength conversion device 100 is emitted from the light outlet after being reflected by the inner wall surface of the reflective cup 110.
  • the light splitting member includes a second reflective member 152.
  • the second reflective member 152 has a second reflective surface 152a, and the collimated outgoing light 170b is reflected by the second reflective surface 152a and then emitted.
  • the light source 130 can be disposed on the side where the second reflective surface 152a is located. Since the collimated outgoing light 170b has a high parallelism, the second reflective member 152 can be disposed close to the light outlet or away from the light outlet.
  • the second reflective member 152 may be a reflective mirror or a reflective filter.
  • the second reflective member 152 can change the emission direction of the collimated light 170b. By adjusting the angle of the second reflective member 152, the collimated light 170b can be reflected to a preset light receiving device.
  • the specific optical path of the laser wavelength conversion device 100 is as follows: the light source 130 emits excitation light. After being collimated by the lens 140, the excitation light becomes collimated incident light 170a. The collimated incident light 170a is projected to the wavelength converter 120. The converter 120 converts the excitation light irradiated on it into the laser light, which is scattered to the collimated reflective cup 110, reflected by the inner wall surface of the reflective cup 110, and then emitted from the light outlet to form collimated outgoing light 170b. After the collimated outgoing light 170b is reflected by the second reflective surface 152a, it emits out of the laser wavelength conversion device 100.
  • the light splitting element includes a first reflective element 151 and a second reflective element 152.
  • the first reflective element 151 has a first reflective surface 151a.
  • the collimated incident light 170a is reflected by the first reflective surface 151a and then projected to the wavelength converter. 120.
  • the second reflective member 152 has a second reflective surface 152a, and the collimated outgoing light 170b is reflected by the second reflective surface 152a and then emitted.
  • the light source 130 can be disposed on one side of the first reflective surface 151a.
  • the first reflective member 151 and the light source 130 can be located on the same side of the reflective cup 110, or they can be located on different sides of the reflective cup 110.
  • the specific optical path of the laser wavelength conversion device 100 is as follows: the light source 130 emits excitation light. After the excitation light is collimated by the lens 140, it becomes collimated incident light 170a. The collimated incident light 170a is reflected by the first reflective surface 151a. Projected to the wavelength converter 120, the wavelength converter 120 converts the excitation light irradiated on it into the laser light, the laser light is scattered to the collimated reflective cup 110, reflected by the inner wall surface of the reflective cup 110, and then emitted from the light outlet. , forming collimated emitted light 170b, which is reflected by the second reflective surface 152a and then emitted from the laser wavelength conversion device 100.
  • a first light hole 110 a is opened on the inner wall surface, and the collimated incident light 170 a passes through the first light hole 110 a and is projected to the wavelength converter 120 .
  • the light splitting member includes a second reflective member 152.
  • the second reflective member 152 has a second reflective surface 152a.
  • the collimated outgoing light 170b is reflected by the second reflective surface 152a and then emitted.
  • the specific optical path of the laser wavelength conversion device 100 is as follows: the light source 130 emits excitation light. After the excitation light is collimated by the lens 140, it becomes collimated incident light 170a. The collimated incident light 170a passes through the side wall of the reflective cup 110. After the first light hole 110a, it is projected to the wavelength converter 120, and the wavelength converter 120 converts the excitation light irradiated thereon into the The laser is scattered by the laser light onto the collimated reflective cup 110. After being reflected by the inner wall surface of the reflective cup 110, it is emitted from the light outlet to form collimated outgoing light 170b. Then, after the collimated outgoing light 170b is reflected by the second reflective surface 152a, The laser wavelength conversion device 100 is emitted.
  • the proportion of the received laser light transmitted through the second light hole 153a is very small, and its loss is negligible. Since the collimated outgoing light 170b has a high degree of parallelism, the third reflecting member 153 can be placed close to the light outlet or away from the light outlet.
  • the third reflective member 153 may be a reflective mirror or a reflective filter.
  • the specific optical path of the laser wavelength conversion device 100 is as follows: the light source 130 emits excitation light. After the excitation light is collimated by the lens 140, it becomes collimated incident light 170a. The collimated incident light 170a passes through the third reflective member 153. After the second light hole 153a, it is projected to the wavelength converter 120. The wavelength converter 120 converts the excitation light irradiated thereon into the laser light. The laser light is scattered to the inner wall surface of the reflective cup 110 and passes through the inner wall of the reflective cup 110. After reflection on the wall, it is emitted from the light outlet to form collimated emitted light 170b. After being reflected by the third reflective member 153, the collimated emitted light 170b is emitted from the laser wavelength conversion device 100.
  • the first reflective surface 151a, the second reflective surface 152a and the third reflective surface 153b may be flat surfaces or curved surfaces.
  • the flat reflective surfaces only have a reflection effect.
  • the curved reflective surface can also achieve other optical purposes while reflecting, such as further collimation or focusing.
  • the light splitting element includes a first light splitting filter 154.
  • the first light splitting filter 154 has a first transmission surface 154a and a fourth reflection surface 154b arranged oppositely.
  • the fourth reflection surface 154b is disposed toward the light outlet of the reflective cup 110.
  • the light source 130 and the lens 140 are disposed on the side of the first transmission surface 154a.
  • the collimated incident light 170a enters the first spectroscopic filter 154 from the first transmission surface 154a and is reflected from the fourth After the first dichroic filter 154 is emitted from the surface 154b, it is projected to the wavelength converter 120.
  • the collimated light 170b is reflected by the fourth reflective surface 154b and then emitted from the laser wavelength conversion device 100.
  • the specific optical path of the laser wavelength conversion device 100 is: the light source 130 emits excitation light, and the excitation light After being collimated by the lens 140, it becomes collimated incident light 170a. After being transmitted through the first transmission surface 154a, the collimated incident light 170a is projected to the wavelength converter 120.
  • the wavelength converter 120 converts the excitation light irradiated thereon into the laser light.
  • the laser light is scattered onto the collimated reflective cup 110, reflected by the inner wall surface of the reflective cup 110, and then emitted from the light outlet to form collimated emitted light 170b. After being reflected by the fourth reflective surface 154b, the collimated emitted light 170b is emitted.
  • Laser wavelength conversion device 100 the light source 130 emits excitation light, and the excitation light After being collimated by the lens 140, it becomes collimated incident light 170a. After being transmitted through the first transmission surface 154a, the collimated incident light 170a is projected to the wavelength converter 120.
  • the light splitting element includes a second light splitting filter 155.
  • the second light splitting filter 155 has a second transmission surface 155a and a fifth reflection surface 155b arranged oppositely.
  • the fifth reflection surface 155b is set toward the light outlet of the reflective cup 110.
  • the light source 130 and the lens 140 are set on the side where the fifth reflective surface 155b is located.
  • the second spectroscopic filter 155 reflects the excitation light and transmits the laser light.
  • the collimated incident light 170a is split by the second spectrophotometer. After reflection by the optical filter 155, it is projected to the wavelength converter 120, and the collimated outgoing light 170b is transmitted through the second dichroic filter 155 and then emitted.
  • the second transmission surface 155a can filter out the excitation light, thereby making the wavelength consistency of the collimated outgoing light 170b better.
  • the specific optical path of the laser wavelength conversion device 100 in this embodiment is as follows: the light source 130 emits excitation light. After the excitation light is collimated by the lens 140, it becomes collimated incident light 170a. After being reflected by the fifth reflective surface 155b, the collimated incident light 170a is projected. to the wavelength converter 120.
  • the wavelength converter 120 converts the excitation light irradiated on it into the laser light, which is scattered to the collimated reflective cup 110, reflected by the inner wall surface of the reflective cup 110, and then emitted from the light outlet. Collimated outgoing light 170b is formed. After being transmitted through the second transmission surface 155a, the collimated outgoing light 170b is emitted from the laser wavelength conversion device 100.
  • One is to directly project the collimated incident light 170a to the wavelength converter 120.
  • the direct mode has an incidence efficiency of higher.
  • the second is that the collimated incident light 170a is incident on the inner wall surface and reflected to the wavelength converter 120 through the inner wall surface.
  • the position arrangement of the reflective light source 130 is more flexible.
  • the laser wavelength conversion device 100 further includes a heat sink 160 , the heat sink 160 is connected to the wavelength converter 120 , and the heat sink 160 can support the wavelength converter 120 .
  • the heat dissipation device 160 is configured to cool the wavelength converter 120, try to ensure that the wavelength converter 120 is at a suitable operating temperature, and extend the service life of the wavelength converter 120.
  • the heat dissipation device 160 may include a heat pipe radiator and a fan.
  • the heat pipe radiator is in contact with the wavelength converter 120, so that the heat pipe radiator can take away the heat generated by the wavelength converter 120.
  • the fan can be disposed on the heat pipe radiator, and the rotation of the fan can be accelerated. Heat pipe radiator for heat dissipation.
  • the inner wall surface of the reflective cup 110 is a curved surface, and the inner wall surface of the curved surface is configured to reflect the laser light, and cause the laser light to form parallel collimated outgoing light and emit the reflective cup from the light outlet.
  • the inner wall surface of the reflective cup 110 may be a free curved surface, a parabolic curved surface, a hyperbolic curved surface, etc.
  • the inner wall surface of the reflective cup 110 can be designed based on the principle of specular reflection and using different incident angles of the excitation light at the irradiation point on the inner wall surface to design the curvature of the inner wall surface to form a collimated design. due to anti
  • the inner wall surface of the optical cup 110 is collimated and designed so that the excitation light can be emitted from the light outlet after one reflection, thereby improving the emission efficiency of the excitation light.
  • the second aspect of the embodiment of the present application provides a projector 200, including the laser wavelength conversion device 100 and the lens assembly 210 of any of the above embodiments.
  • the laser wavelength conversion device 100 is hidden in The interior of projector 200 is therefore not shown.
  • the lens assembly 210 is installed on the light exit side of the laser wavelength conversion device 100.
  • the collimated light 170b emitted from the laser wavelength conversion device 100 enters the lens assembly 210, and the lens assembly 210 further performs optical processing on the collimated light 170b.
  • the laser wavelength conversion device 100 has fewer optical paths and a simple structure, which is beneficial to the layout of the optical system in the projector and can save space in the projector.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Semiconductor Lasers (AREA)

Abstract

一种激光波长转换装置（100）及投影仪（200），包括波长转换器（120）、反光杯（110）、光源（130）及透镜（140）。反光杯（110）围设于波长转换器（120）外围且具有与波长转换器（120）对应的出光口；光源（130）设置为发射激发光；透镜（140）对应光源（130）设置；透镜（140）和光源（130）均设于反光杯（110）的外部空间，光源（130）发射的激发光到达透镜（140），经透镜（140）汇聚后形成准直入射光（170a），并投射至波长转换器（120），波长转换器（120）激发准直入射光（170a）形成受激光，并经反光杯（110）的内壁面反射后形成准直出射光（170b）从反光杯（110）的出光口射出。

Description

激光波长转换装置及投影仪
本申请要求于2022年05月19日提交中国专利局，申请号为202210545283.2、发明名称为“激光波长转换装置及投影仪”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及激光领域，尤其涉及一种激光波长转换装置及投影仪。
背景技术
相关技术中，波长转换件通常具有荧光粉层，荧光粉层被激发光激发后，发出受激光线，受激光线通常采用聚光透镜进行收集，由于波长转换件在工作时温度较高，使得荧光粉层与透镜往往需要间隔设置，从而导致部分受激光线无法被聚光透镜收集，降低了出光效率。
发明内容
本申请实施例提供了一种激光波长转换装置及投影仪，可以解决出光效率低的问题。
第一方面，本申请实施例提供一种激光波长转换装置，包括波长转换器、反光杯、光源及透镜。反光杯围设于所述波长转换器外围，且所述反光杯具有与所述波长转换器对应的出光口；光源，设置为发射激发光；及透镜，对应所述光源设置；其中，所述透镜和所述光源均设于所述反光杯的外部空间，所述光源发射的激发光到达所述透镜，经所述透镜汇聚后形成准直入射光，并投射至所述波长转换器，所述波长转换器激发所述准直入射光形成受激光，并经所述反光杯的内壁面反射后形成准直出射光从所述反光杯的出光口射出。
在一些示例性的实施例中，所述内壁面上开设有第一通光孔，所述准直入射光穿设所述第一通光孔并投射至所述波长转换器。
在一些示例性的实施例中，激光波长转换装置还包括分光件，分光件位于所述反光杯的外部空间，所述分光件设置为改变所述准直入射光的传播方向，以使所述准直入射光能够到达所述波长转换器，和/或，所述分光件设置为改变所述准直出射光的传播方向，以使所述准直出射光避让所述出光口，射出所述激光波长转换装置。
在一些示例性的实施例中，所述分光件包括第一反射件，所述准直入射光经所述第一反射件反射后投射至所述波长转换器。
在一些示例性的实施例中，所述分光件包括第二反射件，所述第二反射件对应所述出光口设置，所述准直出射光经所述第二反射件反射后，避让所述出光口射出所述激光波长转换装置。
在一些示例性的实施例中，所述分光件包括第三反射件，所述第三反射件对应所述出光口设置，所述第三反射件上开设有第二通光孔，所述准直入射光穿射所述第二通光孔并投射至所述波长转换器，所述准直出射光经所述第三反射件反射后，避让所述出光口射出所述激光波长转换装置。
在一些示例性的实施例中，所述分光件包括第一分光滤光片，所述第一分光滤光片对应所述出光口设置，所述准直入射光透射所述第一分光滤片后投射至所述波长转换器，所述准直出射光经所述第一分光滤光片反射后，避让所述出光口射出所述激光波长转换装置。
在一些示例性的实施例中，所述分光件包括第二分光滤光片，所述准直入射光经所述第二分光滤光片反射后，投射至所述波长转换器，所述准直出射光透射所述第二分光滤光片后，射出所述激光波长转换装置。
在一些示例性的实施例中，所述准直入射光投射至所述波长转换器包括：所述准直入射光直接投射至所述波长转换器，或所述准直入射光经所述反光杯的内壁面反射至所述波长转换器。
在一些示例性的实施例中，激光波长转换装置还包括散热装置，所述散热装置与所述波长转换器连接，设置为冷却所述波长转换器。
在一些示例性的实施例中，所述反光杯的内壁面为曲面，设置为反射所述受激光，且使所述受激光形成平行的所述准直出射光从所述出光口射出所述反光杯。
第二方面，本申请实施例提供了一种投影仪，包括如上述任一实施例所述的激光波长转换装置及镜头组件，所述镜头组件装设在所述激光波长转换装置的出光侧，所述激光波长转换装置出射的所述准直出射光进入所述镜头组件。
本申请实施例光源发出的激发光通过透镜准直后投射至波长转换器，从而使得大部分的激发光都能入射至波长转换器，减少了激发光的入射损失。其次，反光杯可以对受激光进行准直，受激光只需经反光杯的内壁面一次反射，即可从出光口出射，减少因反光杯多次反射造成的能量损失，并且波长转换器在反光杯底部，受激光全部经反光杯的出光口，出射到光学系统中，提高出光效率。再者，波长转换器位于反光杯的内部空间，光源和透镜位于反光杯的外部空间，使整个装置的光路通畅，防止因结构件位置安装不当导致影响光路的情况发 生，降低光损耗。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例中所需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申请的一些实施例，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为本申请一种实施例中的激光波长转换装置的结构示意图；
图2为本申请一种实施例中的反光杯开设有第一通光孔的结构示意图；
图3为本申请一种实施例中的第一反射件对应光源设置的结构示意图；
图4为本申请一种实施例中第二反射件对应出光口设置的结构示意图；
图5为本申请一种实施例中第一反射件对应光源设置及第二反射件对应出光口设置的结构示意图；
图6为本申请一种实施例中第三反射件对应出光口设置的结构示意图；
图7为本申请一种实施例中第一分光滤光片对应出光口设置的结构示意图；
图8为本申请一种实施例中第二分光滤光片对应出光口设置的结构示意图；
图9为本申请又一种实施例中第三反射件对应出光口设置的结构示意图；
图10为本申请又一种实施例中第一分光滤光片对应出光口设置的结构示意图；
图11为本申请又一种实施例中第二分光滤光片对应出光口设置的结构示意图；
图12为本申请一种实施例中的投影仪的结构示意图。
附图标记说明：100、激光波长转换装置；110、反光杯；110a、第一通光孔；120、波
长转换器；130、光源；140、透镜；151、第一反射件；151a、第一反射面；152、第二反射件；152a、第二反射面；153、第三反射件；153a、第二通光孔；153b、第三反射面；154、第一分光滤光片；154a、第一透射面；154b、第四反射面；155、第二分光滤光片；155a、第二透射面；155b、第五反射面；160、散热装置；170a、准直入射光；170b、准直出射光；200、投影仪；210、镜头组件。
具体实施方式
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本申请，并不 用于限定本申请。
如图1所示，本申请实施例提供一种激光波长转换装置100，激光波长转换装置100包括反光杯110、波长转换器120、光源130及透镜140。
光源130设置为发射激发光，透镜140对应光源130设置，光源130产生的激发光经透镜140汇聚后形成准直入射光170a，并投射至波长转换器120。透镜140可以为平凸透镜或凹凸透镜，平凸透镜或凹凸透镜对入射的激发光进行准直，使更多地激发光可以照射到波长转换器120上，减小激发光的光损。
波长转换器120包括荧光粉层，荧光粉层可以为单色荧光粉或双色荧光粉，荧光粉层设置为将准直入射光170a吸收并转化成受激光。例如，光源130发射蓝色激发光时，蓝色激发光投射至波长转换器120的荧光粉层，并被荧光粉层激发，产生包括混合红光、绿光或者其他波长的受激光。
其中，反光杯110围设于波长转换器120外围，且反光杯110具有与波长转换器120对应的出光口，透镜140和光源130可以均设于反光杯110的外部空间。准直入射光170a可从出光口进入反光杯110的内部空间，并投射至波长转换器120，波长转换器120激发准直入射光170a形成受激光，受激光经反光杯110的内壁面反射形成准直出射光170b，准直出射光170b经反光杯110的出光口射出反光杯110。
反光杯110的内壁面对反射的光线具有准直的效果，例如对受激光进行反射，使受激光经过反光杯110的内壁面反射，即可从出光口出射，防止受激光在反光杯110内多次反射，造成较大的光损，从而降低出射效率。内壁面可以进行镀膜，以提升内壁面的反射效果。
综上所述，本申请的实施例通过反光杯110收集受激光，相比于透镜140，反光杯110收集受激光的效率更高，受激光的亮度更高。其次，本申请实施例的透镜140具有准直的效果，可以使得受激光通过反光杯110一次反射后即可从出光口出射，减少因反光杯110多次反射造成的能量损失，并且波长转换器120在反光杯110的底部，受激光全部经反光杯110口，出射到光学系统中，减少了受激光的光损，提升受激光的出射效率。再者，本申请实施例的透镜140可以对光源130发出的激发光进行准直，从而使得大部分的激发光入射至波长转换器120，减少了激发光光损，提升激发光的入射效率。波长转换器120位于反光杯110的内部空间，光源130和透镜140位于反光杯110的外部空间，使整个装置的光路通畅，可以防止因结构件位置安装不当导致影响光路的情况发生，降低光损耗。
如图2所示，在一些实施例中，内壁面上开设有第一通光孔110a，准直入射光170a也 可穿设第一通光孔110a进入反光杯110的内部空间，并投射至波长转换器120。可设置第一通光孔110a的孔径与准直入射光170a光束的外径相等，使准直入射光170a能够全部穿设第一通光孔110a即可，尽可能地缩小第一通光孔110a的孔径，使大部分受激光都可以被反射，而从第一通光孔110a透射的受激光的比例很小，降低光损耗。
本实施例中，激光波长转换装置100具体的光路路径为，光源130发出激发光，激发光经过透镜140准直后，变成准直入射光170a，准直入射光170a穿过反光杯110侧壁上的第一通光孔110a后，投射到波长转换器120，波长转换器120将照射在其上的激发光转换成受激光，受激光散射到准直设计的反光杯110上，通过反光杯110的内壁面反射后从出光口射出形成准直出射光170b，射出激光波长转换装置100。
在一些实施例中，激光波长转换装置100还包括分光件，分光件位于反光杯110的外部空间。分光件设置为改变准直入射光170a的传播方向，以使准直入射光170a能够到达波长转换器120，和/或，分光件设置为改变准直出射光170b的传播方向，以使准直出射光170b避让所述出光口，射出激光波长转换装置100。换言之，分光件可以改变准直入射光170a的入射角度，以使得光源130的位置布置更加灵活；或者分光件可以改变准直出射光170b的出射角度，使得预设受光装置的位置布置更加灵活；又或者分光件可以同时改变准直入射光170a的入射角度与准直出射光170b的出射角度，以同时兼顾上述优点。受光装置可以是投影仪的LCD面板或者是投影片。
如图3所示，在一些实施例中，分光件包括第一反射件151，第一反射件151具有第一反射面151a，准直入射光170a经第一反射面151a反射后投射至波长转换器120。第一反射件151与光源130可以位于反光杯110的同一侧，也可以位于反光杯110的不同侧。第一反射件151可选设置于反光杯110的外部空间，以防止对受激光造成遮挡，影响受激光的出光效率。第一反射件151具体可以为反光镜等。本实施例中光源130与第一反射件151配合，通过改变第一反射件151的角度，可以将入射角度的准直入射光170a反射至波长转换器120，从而使得光源130的位置设置更加灵活。例如，激光波长转换装置100应设置为在投影仪中，光源130可以设置在投影仪内部空间的多个位置，从而留出更多的空间给其他部件，降低其他部件的排布难度。
本实施例中，激光波长转换装置100具体的光路路径为，光源130发出激发光，激发光经过透镜140准直后，变成准直入射光170a，准直入射光170a经第一反射面151a反射后投射至波长转换器120，波长转换器120将照射在其上的激发光转换成受激光，受激光散射到 准直设计的反光杯110上，通过反光杯110的内壁面反射后从出光口射出激光波长转换装置100。
如图4所示，在一些实施例中，分光件包括第二反射件152，第二反射件152具有第二反射面152a，准直出射光170b经第二反射面152a反射后射出。光源130可以设置于第二反射面152a所在的一侧，由于准直出射光170b的平行度较高，第二反射件152可以靠近出光口或者远离出光口设置。第二反射件152具体可以为反光镜或者反光滤光片等。第二反射件152可以改变准直出射光170b的出射方向，通过调整第二反射件152的角度，可以将准直出射光170b反射至预设的受光装置上。
本实施例中，激光波长转换装置100具体的光路路径为，光源130发出激发光，激发光经过透镜140准直后，变成准直入射光170a，准直入射光170a投射至波长转换器120，波长转换器120将照射在其上的激发光转换成受激光，受激光散射到准直设计的反光杯110上，通过反光杯110的内壁面反射后从出光口射出，形成准直出射光170b，准直出射光170b经第二反射面152a反射后，射出激光波长转换装置100。
如图5所示，分光件包括第一反射件151及第二反射件152，第一反射件151具有第一反射面151a，准直入射光170a经第一反射面151a反射后投射至波长转换器120。第二反射件152具有第二反射面152a，准直出射光170b经第二反射面152a反射后射出。光源130可以设置于第一反射面151a的一侧，同时，第一反射件151与光源130可以位于反光杯110的同一侧，也可以位于反光杯110的不同侧。
本实施例中，激光波长转换装置100具体的光路路径为，光源130发出激发光，激发光经过透镜140准直后，变成准直入射光170a，准直入射光170a经第一反射面151a反射后投射至波长转换器120，波长转换器120将照射在其上的激发光转换成受激光，受激光散射到准直设计的反光杯110上，通过反光杯110的内壁面反射后从出光口射出，形成准直出射光170b，准直出射光170b经第二反射面152a反射后射出激光波长转换装置100。
再次参考图2，在一些实施例中，内壁面上开设有第一通光孔110a，准直入射光170a穿设第一通光孔110a并投射至波长转换器120。分光件包括第二反射件152，第二反射件152具有第二反射面152a，准直出射光170b经第二反射面152a反射后射出。
本实施例中，激光波长转换装置100具体的光路路径为，光源130发出激发光，激发光经过透镜140准直后，变成准直入射光170a，准直入射光170a穿过反光杯110侧壁上的第一通光孔110a后，投射到波长转换器120，波长转换器120将照射在其上的激发光转换成受 激光，受激光散射到准直设计的反光杯110上，通过反光杯110的内壁面反射后从出光口射出形成准直出射光170b，然后准直出射光170b经第二反射面152a反射后，射出激光波长转换装置100。
如图6所示，在一些实施例中，分光件包括第三反射件153，第三反射件153上开设有第二通光孔153a，第三反射件153具有第三反射面153b，准直入射光170a穿射第二通光孔153a并投射至波长转换器120，准直出射光170b经第三反射件153反射后射出。其中入射于第三反射面153b上第二通光孔153a以外的部分的受激光被反射，由于第二通光孔153a占第三反射面153b的面积很小，因此大部分受激光都可以被反射，而从第二通光孔153a透射的受激光的比例很小，其损失可以忽略不计。由于准直出射光170b的平行度较高，第三反射件153可以靠近出光口或者远离出光口设置。第三反射件153可以为反光镜或者反光滤光片。
本实施例中，激光波长转换装置100具体的光路路径为，光源130发出激发光，激发光经过透镜140准直后，变成准直入射光170a，准直入射光170a穿过第三反射件153上的第二通光孔153a后，投射至波长转换器120，波长转换器120将照射在其上的激发光转换成受激光，受激光散射到反光杯110的内壁面，通过反光杯110的内壁面反射后从出光口射出，形成准直出射光170b，准直出射光170b经第三反射件153反射后，射出激光波长转换装置100。
需要说明的是，上述实施例中，第一反射面151a、第二反射面152a及第三反射面153b可以是平面，也可以是曲面。第一反射面151a、第二反射面152a及第三反射面153b为平面时，平面反射面只起到反射的效果。第一反射面151a、第二反射面152a及第三反射面153b为曲面时，曲面反射面在反射的同时还可以实现其它的光学目的，比如进一步的准直或者聚焦。
如图7所示，在一些实施例中，分光件包括第一分光滤光片154，第一分光滤光片154具有相对设置的第一透射面154a和第四反射面154b，第四反射面154b朝向反光杯110的出光口设置，光源130和透镜140设于第一透射面154a所在的一侧，准直入射光170a从第一透射面154a进入第一分光滤光片154并从第四反射面154b射出第一分光滤光片154后，投射至波长转换器120，准直出射光170b经第四反射面154b反射后，射出激光波长转换装置100。
本实施例中，激光波长转换装置100具体的光路路径为，光源130发出激发光，激发光 经过透镜140准直后，变成准直入射光170a，准直入射光170a透射于第一透射面154a后，投射到波长转换器120，波长转换器120将照射在其上的激发光转换成受激光，受激光散射到准直设计的反光杯110上，通过反光杯110的内壁面反射后从出光口射出，形成准直出射光170b，准直出射光170b经第四反射面154b反射后，射出激光波长转换装置100。
如图8所示，在一些实施例中，分光件包括第二分光滤光片155，第二分光滤光片155具有相对设置的第二透射面155a和第五反射面155b，第五反射面155b朝向反光杯110的出光口设置，光源130和透镜140设于第五反射面155b所在的一侧，第二分光滤光片155反射激发光且透射受激光，准直入射光170a经第二分光滤光片155反射后，投射至波长转换器120，准直出射光170b透射于第二分光滤光片155后射出。第二透射面155a可以滤除激发光，从而使得准直出射光170b的波长一致性更好。
本实施例激光波长转换装置100具体的光路路径为，光源130发出激发光，激发光经过透镜140准直后，变成准直入射光170a，准直入射光170a经第五反射面155b反射后，投射到波长转换器120，波长转换器120将照射在其上的激发光转换成受激光，受激光散射到准直设计的反光杯110上，通过反光杯110的内壁面反射后从出光口射出，形成准直出射光170b，准直出射光170b经第二透射面155a透射后，射出激光波长转换装置100。
在一些实施例中，准直入射光170a投射至波长转换器120包括两种方式，如图1-8所示，其一是准直入射光170a直接投射至波长转换器120，直射式的方式入射效率较高。如图9-11所示，其二是准直入射光170a入射至内壁面，经内壁面反射至波长转换器120，反射式的方式光源130的位置布置更加灵活。
如图1-11所示，在一些实施例中，激光波长转换装置100还包括散热装置160，散热装置160与波长转换器120连接，散热装置160可以支撑波长转换器120。散热装置160设置为冷却波长转换器120，尽量保证波长转换器120处于合适的工作温度，延长波长转换器120的使用寿命。散热装置160可以包括热管散热器和风扇，热管散热器与波长转换器120抵接，使得热管散热器可以带走波长转换器120产生的热量，风扇可以设置于热管散热器上，风扇转动可以加快热管散热器的散热。
如图1-11所示，在一些实施例中，反光杯110的内壁面为曲面，曲面的内壁面设置为反射受激光，且使受激光形成平行的准直出射光从出光口射出反光杯，例如反光杯110的内壁面可为自由曲面、抛物线曲面或双曲线曲面等。反光杯110的内壁面可以根据镜面反射原理，利用激发光在内壁面照射点的入射角度不同，设计内壁面曲率，形成准直设计。由于反 光杯110的内壁面经过准直设计，从而使激发光进行一次反射后，即可从出光口射出，提升激发光的出射效率。
如图1-12所示，本申请实施例第二方面提供一种投影仪200，包括上述任一实施例的激光波长转换装置100及镜头组件210，图12中，激光波长转换装置100隐藏于投影仪200的内部，因而未示出。镜头组件210装设在激光波长转换100装置的出光侧，激光波长转换装置100出射的准直出射光170b进入镜头组件210，镜头组件210对准直出射光170b进一步进行光学处理。本实施例的投影仪中，激光波长转换装置100的光路较少，结构简单，有利于投影仪内光学系统的布置，同时可以节省投影仪内的空间。
本实施例的附图中相同或相似的标号对应相同或相似的部件；在本申请的描述中，需要理解的是，若有术语“上”、“下”、“左”、“右”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此附图中描述位置关系的用语仅用于示例性说明，不能理解为对本专利的限制，对于本领域的普通技术人员而言，可以根据具体情况理解上述术语的具体含义。
以上所述仅为本申请的较佳实施例而已，并不用以限制本申请，凡在本申请的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本申请的保护范围之内。

Claims (20)

  1. 一种激光波长转换装置，其中，所述激光波长转换装置包括：
    波长转换器；
    反光杯，围设于所述波长转换器外围，且所述反光杯具有与所述波长转换器对应的出光口；
    光源，设置为发射激发光；及
    透镜，对应所述光源设置；
    其中，所述透镜和所述光源均设于所述反光杯的外部空间，所述光源发射的激发光到达所述透镜，经所述透镜汇聚后形成准直入射光，并投射至所述波长转换器，所述波长转换器激发所述准直入射光形成受激光，并经所述反光杯的内壁面反射后形成准直出射光从所述反光杯的出光口射出。
  2. 根据权利要求1所述的激光波长转换装置，其中，所述内壁面上开设有第一通光孔，所述准直入射光穿设所述第一通光孔并投射至所述波长转换器。
  3. 根据权利要求1所述的激光波长转换装置，其中，所述激光波长转换装置还包括：
    分光件，位于所述反光杯的外部空间，所述分光件设置为改变所述准直入射光的传播方向，以使所述准直入射光能够到达所述波长转换器，和/或，所述分光件设置为改变所述准直出射光的传播方向，以使穿过所述出光口的所述准直出射光避让所述出光口，射出所述激光波长转换装置。
  4. 根据权利要求3所述的激光波长转换装置，其中，所述分光件包括第一反射件，所述准直入射光经所述第一反射件反射后投射至所述波长转换器。
  5. 根据权利要求3所述的激光波长转换装置，其中，所述分光件包括第二反射件，所述第二反射件对应所述出光口设置，所述准直出射光经所述第二反射件反射后，避让所述出光口射出所述激光波长转换装置。
  6. 根据权利要求4所述的激光波长转换装置，其中，所述分光件包括第二反射件，所述第二反射件对应所述出光口设置，所述准直出射光经所述第二反射件反射后，避让所述出光口射出所述激光波长转换装置。
  7. 根据权利要求3所述的激光波长转换装置，其中，所述分光件包括第三反射件，所述第三反射件对应所述出光口设置，所述第三反射件上开设有第二通光孔，所述准直入射光穿射所述第二通光孔并投射至所述波长转换器，所述准直出射光经所述第三反射件反射后，避让所述出光口射出所述激光波长转换装置。
  8. 根据权利要求3所述的激光波长转换装置，其中，所述分光件包括第一分光滤光片，所述第一分光滤光片对应所述出光口设置，所述准直入射光透射所述第一分光滤片后投射至所述波长转换器，所述准直出射光经所述第一分光滤光片反射后，避让所述出光口射出所述激光波长转换装置。
  9. 根据权利要求3所述的激光波长转换装置，其中，所述分光件包括第二分光滤光片，所述准直入射光经所述第二分光滤光片反射后，投射至所述波长转换器，所述准直出射光透射所述第二分光滤光片后，射出所述激光波长转换装置。
  10. 根据权利要求1所述的激光波长转换装置，其中，所述准直入射光投射至所述波长转换器包括：
    所述准直入射光直接投射至所述波长转换器，或所述准直入射光经所述反光杯的内壁面反射至所述波长转换器。
  11. 根据权利要求1所述的激光波长转换装置，其中，所述激光波长转换装置还包括散热装置，所述散热装置与所述波长转换器连接，设置为冷却所述波长转换器。
  12. 根据权利要求1所述的激光波长转换装置，其中，所述反光杯的内壁面为曲面，设置为反射所述受激光，且使所述受激光形成平行的所述准直出射光从所述出光口射出所述反光杯。
  13. 一种投影仪，其中，所述投影仪包括如激光波长转换装置及镜头组件；所述激光波长转换装置包括：
    波长转换器；
    反光杯，围设于所述波长转换器外围，且所述反光杯具有与所述波长转换器对应的出光口；
    光源，设置为发射激发光；及
    透镜，对应所述光源设置；
    其中，所述透镜和所述光源均设于所述反光杯的外部空间，所述光源发射的激发光到达所述透镜，经所述透镜汇聚后形成准直入射光，并投射至所述波长转换器，所述波长转换器激发所述准直入射光形成受激光，并经所述反光杯的内壁面反射后形成准直出射光从所述反光杯的出光口射出；
    所述镜头组件装设在所述激光波长转换装置的出光侧，所述激光波长转换装置出射的所述准直出射光进入所述镜头组件。
  14. 根据权利要求13所述的投影仪，其中，所述内壁面上开设有第一通光孔，所述准直入射光穿设所述第一通光孔并投射至所述波长转换器。
  15. 根据权利要求13所述的投影仪，其中，所述激光波长转换装置还包括：
    分光件，位于所述反光杯的外部空间，所述分光件设置为改变所述准直入射光的传播方向，以使所述准直入射光能够到达所述波长转换器，和/或，所述分光件设置为改变所述准直出射光的传播方向，以使穿过所述出光口的所述准直出射光避让所述出光口，射出所述激光波长转换装置。
  16. 根据权利要求15所述的投影仪，其中，所述分光件包括第一反射件，所述准直入射光经所述第一反射件反射后投射至所述波长转换器。
  17. 根据权利要求15所述的投影仪，其中，所述分光件包括第二反射件，所述第二反射件对应所述出光口设置，所述准直出射光经所述第二反射件反射后，避让所述出光口射出所述激光波长转换装置。
  18. 根据权利要求16所述的投影仪，其中，所述分光件包括第二反射件，所述第二反射件对应所述出光口设置，所述准直出射光经所述第二反射件反射后，避让所述出光口射出所述激光波长转换装置。
  19. 根据权利要求15所述的投影仪，其中，所述分光件包括第三反射件，所述第三反射件对应所述出光口设置，所述第三反射件上开设有第二通光孔，所述准直入射光穿射所述第二通光孔并投射至所述波长转换器，所述准直出射光经所述第三反射件反射后，避让所述出光口射出所述激光波长转换装置。
  20. 根据权利要求15所述的投影仪，其中，所述分光件包括第一分光滤光片，所述第一分光滤光片对应所述出光口设置，所述准直入射光透射所述第一分光滤片后投射至所述波长转换器，所述准直出射光经所述第一分光滤光片反射后，避让所述出光口射出所述激光波长转换装置。
PCT/CN2023/076465 2022-05-19 2023-02-16 激光波长转换装置及投影仪 WO2023221577A1 (zh)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012013898A (ja) * 2010-06-30 2012-01-19 Jvc Kenwood Corp 光源装置および投射型表示装置
CN102818170A (zh) * 2012-03-23 2012-12-12 深圳市绎立锐光科技开发有限公司 光源
CN103615671A (zh) * 2013-10-28 2014-03-05 吴震 光源
CN211318970U (zh) * 2020-03-03 2020-08-21 无锡视美乐激光显示科技有限公司 激光光源系统和光学设备

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012013898A (ja) * 2010-06-30 2012-01-19 Jvc Kenwood Corp 光源装置および投射型表示装置
CN102818170A (zh) * 2012-03-23 2012-12-12 深圳市绎立锐光科技开发有限公司 光源
CN103615671A (zh) * 2013-10-28 2014-03-05 吴震 光源
CN211318970U (zh) * 2020-03-03 2020-08-21 无锡视美乐激光显示科技有限公司 激光光源系统和光学设备

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