Laser lens, preparation method thereof and laser equipment

Abstract

The embodiment of the invention belongs to the technical field of optical equipment, provides a laser lens, a preparation method thereof and laser equipment, and aims to solve the technical problem that the projection picture effect of a laser television is affected due to the temperature drift problem of the laser lens in the related technology. The laser lens comprises a lens seat, a lens assembly and a reflector, preparation materials of the reflector comprise a heat dissipation material and an optical material, the heat conductivity coefficient of the heat dissipation material is larger than that of the optical material, and the heat dissipation material is configured to conduct heat generated by light reflected by the reflector so as to reduce the temperature of the reflector. In the laser lens, the heat dissipation material can reduce the temperature of the reflector, the reflector is prevented from deforming due to excessive heat, the problem of temperature drift of the laser lens is further avoided, and the image display effect of laser equipment is ensured.

Description

Technical Field

[0001] The embodiments of the present application relate to optical equipment technology, and more particularly to a laser lens, a method for manufacturing the same, and a laser device. Background Art

[0002] Laser TVs operate by projecting light from a laser projector onto a screen, which then reflects the light back into the user's eyes. Current laser TVs typically use ultra-short-throw lenses, enabling larger displays at shorter distances. With increasing demand for thinner and lighter laser TVs, the size of ultra-short-throw lenses is shrinking. Heat generated by the light beam can easily deform at least one of the microlenses within the lens, leading to temperature drift in the laser lens and affecting the quality of the laser TV's projection. Summary of the Invention

[0003] The embodiments of the present application provide a laser lens, a preparation method thereof, and a laser device, which can solve the technical problem that the micro-lens of the ultra-short focus lens deforms, thereby causing the laser lens to drift in temperature, thereby affecting the projection image effect of the laser TV.

[0004] In a first aspect, an embodiment of the present application provides a laser lens, comprising:

[0005] lens mount;

[0006] A lens assembly, the lens assembly being arranged on the lens mount and being used to form an image of incident light;

[0007] a reflector, wherein the reflector is arranged on the lens mount;

[0008] The reflector has a reflective surface, which is arranged opposite to the output end of the lens assembly and faces the lens assembly, and is used to reflect the image light beam emitted from the output end; the preparation material of the reflector includes a heat dissipation material and an optical material, the thermal conductivity of the heat dissipation material is greater than the thermal conductivity of the optical material, and the heat dissipation material is configured to conduct the heat generated by the reflector when reflecting the light so as to reduce the temperature of the reflector.

[0009] In the laser lens of the embodiment of the present application, the materials used to prepare the reflector include optical materials and heat dissipation materials. The heat dissipation material has thermal conductivity better than that of the optical material. In the process of the reflector reflecting light and generating heat, the heat dissipation material can conduct the heat to the outside of the reflector, thereby reducing the temperature of the reflector and preventing the reflector from being deformed due to excessive heat, thereby avoiding the problem of temperature drift in the laser lens, thereby ensuring the picture display effect of the laser device.

[0010] In some embodiments of the present application, the thermal conductivity of the heat dissipation material is greater than or equal to 5 W / (m*K).

[0011] With this arrangement, the heat dissipation material has good thermal conductivity, and the heat is conducted through the heat dissipation material at a faster rate. When the reflector is mixed with the above-mentioned heat dissipation material, the heat dissipation material can conduct the heat to the outside of the reflector at a higher conduction rate, which can quickly reduce the temperature of the reflector, avoid deformation of the reflector due to excessive heat, and thus avoid temperature drift problems in the laser lens, thereby ensuring the picture display effect of the laser equipment.

[0012] In some embodiments of the present application, the thermal expansion coefficient of the heat dissipation material is less than or equal to 60*10 -6 ℃.

[0013] In this way, when the thermal expansion coefficient of the heat dissipation material is less than or equal to 60*10 -6 When the temperature is 0.1°C, the heat dissipation material is less susceptible to deformation due to temperature changes. When the reflector is mixed with the above-mentioned heat dissipation material, under the same temperature change, the heat dissipation material can reduce the deformation of the reflector, preventing the reflector from deforming to a large extent, thereby preventing the laser lens from temperature drift, thereby ensuring the image display quality of the laser device; at the same time, it can reduce the probability of damage to each lens in the laser lens, thereby extending the service life of the projection lens.

[0014] In some embodiments of the present application, the diameter of the heat dissipation material is less than or equal to 1 mm.

[0015] With this arrangement, the diameter of the heat dissipation material is smaller, and the heat dissipation material can be exposed to the outer surface of the reflector with a lower probability, thereby reducing the probability of diffuse reflection of light.

[0016] In some embodiments of the present application, the heat dissipation material includes one or more of graphene, carbon fiber and metal materials.

[0017] In this way, by setting the heat dissipation material of the above material, when the heat dissipation material has good thermal conductivity, the heat is conducted through the heat dissipation material at a faster rate. When the reflector is mixed with the above heat dissipation material, the heat dissipation material can conduct the heat to the outside of the reflector at a higher conduction rate, which can quickly reduce the temperature of the reflector, avoid deformation of the reflector due to excessive heat, and then avoid temperature drift problems of the laser lens, thereby ensuring the picture display effect of the laser equipment.

[0018] When the degree of deformation of the heat dissipation material caused by temperature changes is low, when the reflector is mixed with the above-mentioned heat dissipation material, under the same degree of temperature change, the heat dissipation material can alleviate the deformation of the reflector, avoid the reflector from deforming to a large extent, and thus avoid the temperature drift problem of the laser lens, thereby ensuring the picture display effect of the laser equipment; at the same time, it can reduce the probability of damage to each lens in the laser lens, thereby increasing the service life of the projection lens.

[0019] When the diameter of the heat dissipation material is small, it can be exposed to the outer surface of the reflector with a smaller probability, thereby reducing the probability of diffuse reflection of light.

[0020] In some embodiments of the present application, the reflector further has a non-reflective surface, and the reflective surface and the non-reflective surface are arranged adjacent to each other along the surface extension direction of the reflector;

[0021] The reflective surface comprises at least a first area and a second area adjacent to each other, wherein the light intensity of the first area is greater than the light intensity of the second area;

[0022] The heat dissipation material is located in the first region, or the heat dissipation material is located in the first region and the second region.

[0023] With this arrangement, the heat dissipation material located in the first area can conduct heat to the outside of the reflector at a higher conduction rate, which can quickly reduce the temperature of the reflector, prevent the reflector from being deformed due to excessive heat, and further avoid temperature drift problems in the laser lens, thereby ensuring the picture display effect of the laser equipment.

[0024] In a second aspect, an embodiment of the present application provides a laser lens, comprising a lens holder, a lens assembly, and a reflector;

[0025] The lens assembly is used to image the incident light;

[0026] The reflector has a reflective surface, which is arranged opposite to the output end of the lens assembly and faces the lens assembly, and is used to reflect the image light beam emitted from the output end;

[0027] The reflector is made of materials including heat dissipation materials and optical materials. The heat dissipation materials are configured to conduct heat generated by the reflector reflecting light, so as to reduce the temperature of the reflector.

[0028] In the laser lens provided in the embodiment of the present application, the reflector is made of a material including a mixed optical material and a heat dissipation material. The heat dissipation material has a thermal conductivity that is better than that of the optical material. When the reflector generates heat by reflecting light, the heat dissipation material can conduct the heat to the outside of the reflector, thereby reducing the temperature of the reflector and preventing the reflector from being deformed due to excessive heat, thereby avoiding the problem of temperature drift in the laser lens, thereby ensuring the picture display effect of the laser device.

[0029] In a third aspect, an embodiment of the present application provides a method for preparing a laser lens, comprising:

[0030] mixing and melting the heat dissipation material and the optical material to form a molten mixed material;

[0031] injecting the molten mixed material into an injection mold to form a reflector;

[0032] Coating a film on the surface of the reflector to form a reflective surface;

[0033] The reflector and the lens assembly are mounted on a lens mount, with the reflective surface facing the lens assembly.

[0034] In the method for preparing a laser lens provided in an embodiment of the present application, the materials for preparing the reflector include optical materials and heat dissipation materials; the heat dissipation material has thermal conductivity better than that of the optical material. In the process of heat generated by the reflective surface of the reflector reflecting light, the heat dissipation material can conduct the heat to the outside of the reflector, thereby reducing the temperature of the reflector and preventing the reflector from being deformed due to excessive heat, thereby avoiding the problem of temperature drift in the laser lens, thereby ensuring the picture display effect of the laser device.

[0035] In some embodiments of the present application, injecting the molten mixed material into the injection mold includes:

[0036] Providing a first injection mold and a second injection mold, wherein the first injection mold and the second injection mold are relatively combined to form an injection cavity and an injection channel, and the injection channel is connected to the injection cavity; wherein the injection cavity has a processing surface corresponding to the reflective surface;

[0037] Injecting the molten mixed material into the injection cavity through the injection channel, and setting processing parameters so that the heat dissipation material is distributed at least in the first area of the reflective surface;

[0038] After the molten mixed material is solidified, the first injection mold and the second injection mold are demoulded to form the reflector.

[0039] Heat dissipation materials have better thermal conductivity than optical materials. When the reflector generates heat by reflecting light, the heat dissipation material can conduct the heat to the outside of the reflector, thereby reducing the temperature of the reflector and preventing the reflector from deforming due to excessive heat. In addition, the temperature drift problem of the laser lens is avoided, thereby ensuring the picture display effect of the laser equipment.

[0040] In a fourth aspect, an embodiment of the present application provides a laser device, comprising the aforementioned laser lens.

[0041] The laser device provided in the embodiment of the present application is provided with a reflector made of materials including optical materials and heat dissipation materials; the heat dissipation material has thermal conductivity better than that of the optical material. In the process of the reflector reflecting light and generating heat, the heat dissipation material can conduct the heat to the outside of the reflector, which can reduce the temperature of the reflector and avoid deformation of the reflector due to excessive heat, thereby avoiding temperature drift of the laser lens, thereby ensuring the picture display effect of the laser device. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the implementation methods in the embodiments of the present application or related technologies, the following is a brief introduction to the drawings required for use in the embodiments or related technology descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0043] Figure 1-1 1 is a schematic diagram of a projection imaging process of a projection lens provided by an embodiment of the present invention;

[0044] Figure 1 A schematic diagram of the structure of the laser device provided in an embodiment of the present application;

[0045] Figure 2 A schematic diagram of the structure of the laser lens provided in an embodiment of the present application;

[0046] Figure 3 A schematic diagram of the three-dimensional structure of a first type of reflector for a laser lens provided in an embodiment of the present application;

[0047] Figure 4 A schematic diagram of the front view structure of the first type of reflector of the laser lens provided in an embodiment of the present application;

[0048] Figure 5 A schematic cross-sectional view of a first type of reflector for a laser lens provided in an embodiment of the present application;

[0049] Figure 6 A schematic diagram of the front view structure of the second reflector of the laser lens provided in an embodiment of the present application;

[0050] Figure 7A schematic diagram of the front view structure of a third reflector of the laser lens provided in an embodiment of the present application;

[0051] Figure 8 A schematic diagram of a first process flow of a method for preparing a laser lens provided in an embodiment of the present application;

[0052] Figure 9 A second flow chart of the method for preparing a laser lens provided in an embodiment of the present application.

[0053] Description of reference numerals:

[0054] 10-projection screen; 20-projection lens;

[0055] 200-Laser equipment;

[0056] 210-screen;

[0057] 100-Laser lens;

[0058] 110-lens mount;

[0059] 120-lens assembly;

[0060] 130 - reflector; 131 - reflective surface; 1311 - first region; 1312 - second region; 132 - heat dissipation material; 133 - non-reflective surface. DETAILED DESCRIPTION

[0061] Figure 1-1 1 is a schematic diagram of a projection imaging process of a projection lens provided in an embodiment of the present application. The implementation environment may include a projection screen 10 and a projection lens 20.

[0062] The projection lens 20 can project an image beam onto the projection screen 10, and the image beam can form an image on the projection screen 10. The current projection lens 20 has a relatively small throw ratio (the throw ratio is the ratio of the projection distance S to the long side width H of the image, and the projection distance S is the axial distance between the projection lens 20 and the projection screen 10). Laser projection equipment can be installed closer to the wall (the plane where the projection screen is located), and can project a larger image within a very short projection distance. The projection device host and screen are also more likely to be an integrated device, that is, a laser TV.

[0063] The projection lens with a relatively small projection can be called a short-throw or ultra-short-throw projection lens.

[0064] Laser equipment typically consists of a light source, an optical engine, and a lens. These three components are connected in sequence to form the core optical system of the laser device. The light source currently uses a laser light source to provide the illumination beam, which can be white light or a time-sequential output of three primary colors. The core component of the optical engine is the lens assembly, which implements optical path deflection and shaping according to the requirements of the DMD (Digital Micromirror Device) display light valve. The display light valve drives its internal microstructure based on image information to achieve modulation of different color lights. The modulated light is amplified by the lens and imaged on the projection screen.

[0065] In the embodiment of the present application, the lens is an ultra-short focus lens, which reflects the modulated light beam onto the projection screen. Figure 1-1 As shown, the reflector changes the direction of the beam. As the size of the laser device decreases, the ultra-short-throw lens also shrinks, and the reflector lens also shrinks in size. However, to maintain image quality on the projection screen, the intensity of the reflected beam must remain constant or increase. Heat is more concentrated in the reflector lens than before the reduction in size, making it more susceptible to deformation. This can cause temperature drift in the laser lens, affecting the projection quality of the laser TV.

[0066] In view of this, the laser lens of the embodiment of the present application includes a lens mount, a lens assembly and a reflector, the lens assembly is arranged on the lens mount, and is used to image the incident light; the reflector is arranged on the lens mount; the reflector has a reflective surface, the reflective surface is arranged opposite to the output end of the lens assembly, and the reflective surface faces the lens assembly, and the reflective surface is used to reflect the image light beam emitted from the output end; the preparation material of the reflector includes heat dissipation material and optical material, the thermal conductivity of the heat dissipation material is greater than the thermal conductivity of the optical material, and the heat dissipation material is configured to conduct the heat generated by the reflector reflecting the light to reduce the temperature of the reflector.

[0067] In the laser lens of the embodiment of the present application, the preparation material of the reflector includes a mixed optical material and a heat dissipation material. The heat dissipation material has a thermal conductivity that is better than that of the optical material. In the process of the reflector reflecting light and generating heat, the heat dissipation material can conduct the heat to the outside of the reflector, thereby reducing the temperature of the reflector and preventing the reflector from being deformed due to excessive heat, thereby avoiding the problem of temperature drift in the laser lens, thereby ensuring the picture display effect of the laser equipment.

[0068] In order to make the purpose, implementation mode and advantages of the present application clearer, the exemplary implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0069] It should be noted that the brief descriptions of terms in this application are only for the purpose of facilitating the understanding of the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their ordinary and usual meanings.

[0070] In addition, the terms "comprises" and "comprising" and any variations thereof are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to those components expressly listed but may include other components not expressly listed or inherent to such product or device.

[0071] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0072] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0073] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0074] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0075] Reference Figure 1As shown, in the first aspect, the embodiment of the present application further provides a laser device 200, including a laser lens 100, a light source (not shown in the figure), and a screen 210.

[0076] Among them, the light source can be a laser light source for providing an illumination beam. Exemplarily, the light source can be a three-color light source, including red, blue and green, to display a color image; it can also be a monochromatic light source to display a color image through different excitation phosphors, filter wheels, etc.

[0077] When the laser device 200 is in operation, the light source emits a light beam and shoots it toward the lens assembly 120 of the laser lens 100. The lens assembly 120 modulates the light and shoots it toward the reflector 130. The reflector 130 reflects the light onto the screen 210 for the user to view the image.

[0078] It should be noted that the light source can be located at the bottom of the screen 210, or on the same side as the laser lens 100, that is, on the left or right side of the laser lens 100. The embodiment of the present application does not limit the specific location of the light source, nor is it limited to the above example.

[0079] Reference Figure 2 In a second aspect, an embodiment of the present application provides a laser lens 100, comprising a lens mount 110, a lens assembly 120, and a reflector 130. The lens assembly 120 is disposed on the lens mount 110 and is used to image incident light; the reflector 130 is disposed on the lens mount 110. The reflector 130 and the lens assembly 120 may be spaced apart.

[0080] The lens assembly 120 realizes light path turning and shaping according to the requirements of the DMD display light valve. The display light valve drives the internal microstructure according to the image information to realize the modulation of different color lights. The modulated light is magnified by the lens and then formed into an image on the projection screen.

[0081] It should be noted that the lens mount 110 is used to support the lens assembly 120 and the reflector 130 , and its shape and size can be designed according to the specific shapes of the lens assembly 120 and the reflector 130 , which will not be described in detail here.

[0082] It is understood that the laser lens 100 has an optical axis. The light beam propagates forward along the principal optical axis of the laser lens 100, undergoes optical modulation by the lens assembly 120, and is reflected by the reflector 130 before being projected onto the screen 210. The reflector 130 is located at the rear end of the optical axis of the laser lens 100, and deflects the light beam from the lens assembly 120 while forming an image.

[0083] It should be noted that the reflector 130 may be a free-form surface reflector or a concave aspheric reflector. The embodiment of the present application does not limit the specific type of the reflector 130 and is not limited to the above examples.

[0084] The following description will be made by taking the reflector 130 as a free-form surface reflector as an example.

[0085] It will be appreciated that the lens assembly 120 may include varying numbers of lenses.

[0086] Among them, the specific number of lenses can be one, two, three, four, five, six, etc.; when there are multiple lenses, the multiple lenses can be located at the front end or the middle end of the optical axis of the laser lens 100, and can be distributed at intervals or arranged adjacent to each other; the lens can include a concave lens, a convex lens, or a double-cemented lens. The embodiment of the present application does not limit the number, structure and type of the lens assembly 120, nor is it limited to the above examples.

[0087] Reference Figure 3-Figure 7 As shown, the reflector 130 has a reflective surface 131 , and the reflective surface 133 is used to reflect the image light beam emitted from the output end.

[0088] Reference Figure 3-Figure 7 As shown, the materials used to prepare the reflector 130 include optical materials and heat dissipation materials 132 .

[0089] It should be noted that the optical material may be optical plastic, for example, cycloolefin polymer (COP), and specific types may include Zeonex's K26R, 1430R, 360R, etc. The above materials are only examples.

[0090] It is understandable that optical plastics generally have a relatively low thermal conductivity, such as 0.2 W / (m*K), 0.3 W / (m*K), or 0.4 W / (m*K), that is, the thermal conductivity of optical materials is relatively poor.

[0091] The heat dissipation material 132 has a thermal conductivity greater than that of the optical material. The heat dissipation material 132 is configured to conduct heat generated by the reflector 130 when the reflector reflects light, so as to reduce the temperature of the reflector 130 .

[0092] It can be understood that the heat dissipation material 132 has better thermal conductivity than the optical material. In the process of the optical material reflecting light and generating heat, the heat dissipation material 132 can conduct the heat to the outside of the reflector 130, thereby reducing the temperature of the reflector 130 and preventing the reflector 130 from being deformed due to excessive heat, thereby avoiding the temperature drift problem of the laser lens 100, thereby ensuring the picture display effect of the laser device 200.

[0093] In some possible implementations, the thermal conductivity of the heat dissipation material 132 is greater than or equal to 5 W / (m*K).

[0094] It should be noted that the thermal conductivity of the heat dissipation material 132 can be specifically 5W / (m*K), 10W / (m*K), 20W / (m*K), 30W / (m*K), 40W / (m*K), 50W / (m*K), 60W / (m*K), 70W / (m*K), 80W / (m*K), 90W / (m*K), 100W / (m*K), 150W / (m*K), 2000W / (m*K), etc. The embodiment of the present application does not limit the specific thermal conductivity of the heat dissipation material 132, nor is it limited to the above examples.

[0095] It can be understood that when the thermal conductivity of the heat dissipation material 132 is greater than or equal to 5W / (m*K), the heat dissipation material 132 has good thermal conductivity, and the heat is conducted through the heat dissipation material 132 at a faster rate. When the reflector 130 is mixed with the above-mentioned heat dissipation material 132, the heat dissipation material 132 can conduct heat to the outside of the reflector 130 at a higher conduction rate, which can quickly reduce the temperature of the reflector 130, avoid deformation of the reflector 130 due to excessive heat, and further avoid temperature drift problems of the laser lens 100, thereby ensuring the picture display effect of the laser device 200.

[0096] In some possible implementations, the thermal expansion coefficient of the heat dissipation material 132 is less than or equal to 60*10-6°C.

[0097] It should be noted that optical plastic materials usually have a high thermal expansion coefficient, such as 65*10 -6 ℃、66*10 -6 ℃、67*10 -6 ℃、68*10 -6 ℃、69*10 -6 ℃、70*10 -6 ℃、71*10 -6 ℃、72*10 -6 ℃、73*10 -6 ℃、74*10 -6 ℃、75*10 -6 ℃, etc. The embodiments of the present application do not limit the specific thermal expansion coefficient of the optical material, nor are they limited to the above examples.

[0098] It is understandable that the shape of the optical material having the above-mentioned properties is easily affected by temperature. When the temperature changes, the reflector 130 comprising the optical material is likely to be deformed to a large extent.

[0099] It should be noted that the thermal expansion coefficient of the heat dissipation material 132 is less than or equal to 60*10-6°C, such as 0.1*10 -6 ℃、0.5*10 -6 ℃, 1.0*10 -6 ℃、1.5*10 -6 ℃、2.0*10 -6 ℃、10.0*10 -6 ℃、20.0*10 -6 ℃、30.0*10 -6 ℃、40.0*10 -6 ℃、50.0*10 -6 ℃、60.0*10 -6 ℃, etc. The embodiment of the present application does not limit the specific thermal expansion coefficient of the heat dissipation material 132, nor is it limited to the above examples.

[0100] It is understandable that the shape of the heat dissipation material 132 having the above-mentioned properties is less affected by temperature. When the temperature changes, the reflector 130 having the heat dissipation material 132 is less likely to be deformed to a large extent.

[0101] It is understood that when the thermal expansion coefficient of the heat dissipation material 132 is less than or equal to 60*10 -6 When the temperature is 0.04°C, the heat dissipation material 132 is less deformed by temperature changes. When the reflector 130 is mixed with the heat dissipation material 132, under the same temperature change, the heat dissipation material 132 can reduce the deformation of the reflector 130, preventing the reflector 130 from deforming to a large extent, thereby preventing the laser lens 100 from experiencing temperature drift, thereby ensuring the image display effect of the laser device 200; at the same time, the probability of damage to each lens in the laser lens 100 can be reduced, thereby increasing the service life of the projection lens.

[0102] In some possible implementations, the diameter of the heat dissipation material 132 is less than or equal to 1 mm.

[0103] It should be noted that the diameter of the heat dissipation material 132 can be arbitrary. For example, the diameter of the heat dissipation material 132 can be 0.1μm, 0.5μm, 1.0μm, 5.0μm, 10.0μm, 20.0μm, 30.0μm, 40.0μm, 50.0μm, 60.0μm, 70.0μm, 80.0μm, 90.0μm, 100.0μm, 1mm, etc. The embodiment of the present application does not limit the specific diameter of the heat dissipation material 132, nor is it limited to the above examples.

[0104] It is understandable that the surface roughness of the optical material is smaller than that of the heat dissipation material 132 . Therefore, the diameter of the heat dissipation material 132 will affect the surface roughness of the reflector 130 , and this issue needs to be taken into consideration during the manufacturing of the reflector.

[0105] In some embodiments, when the diameter of the heat dissipation material 132 is large, such as when the diameter of the heat dissipation material 132 is greater than 1 / 15 of the thickness of the reflector and less than or equal to the thickness of the reflector, the heat dissipation material 132 will be more likely to be exposed to the outer surface of the reflector 130. At this time, the surface roughness of the reflector 130 is larger.

[0106] It should be noted that when the surface roughness of the reflector 130 is large, the surface roughness of the reflector 130 used to reflect light is large, and the light is easily diffusely reflected when passing through the reflective surface, thereby affecting the accuracy of light reflection of the reflector 130 and further affecting the reflective performance of the reflector 130.

[0107] By providing the heat dissipation material 132 with the above diameter, the diameter of the heat dissipation material 132 is smaller and can be exposed to the outer surface of the reflector 130 with a lower probability, thereby reducing the probability of diffuse reflection of light.

[0108] It should be noted that the diameter of the heat dissipation material 132 is related to the thickness of the reflector 130. For example, when the thickness of the reflector 130 is greater, the diameter range of the heat dissipation material 132 is larger; when the thickness of the reflector 130 is smaller, the diameter range of the heat dissipation material 132 is smaller.

[0109] In some possible implementations, the heat dissipation material 132 includes one or more of graphene, carbon fiber, and metal materials.

[0110] It is understandable that the metal material can be diverse. For example, the metal material can include one of aluminum, copper, gold, magnesium, silver, nickel, iron, and tin; another example is that the preparation material of the metal can also include multiple of aluminum, copper, gold, magnesium, silver, nickel, iron, and tin, that is, the metal material can also be an alloy.

[0111] It should be noted that the heat dissipation material 132 may have at least one of the aforementioned thermal conductivity, thermal expansion coefficient, and diameter. For example, the thermal conductivity of graphene is in the range of 3000-5000 W / (m*K), and the thermal expansion coefficient of graphene is 8.8*10 -6 ℃, the diameter of graphene can be 0.42μm; the thermal conductivity of carbon fiber is 100W / (m*K), and the thermal expansion coefficient of carbon fiber ranges from 0.5-2.5*10 -6 ℃, the diameter of carbon fiber is 6μm; the thermal conductivity of aluminum is 237W / (m*K), and the thermal expansion coefficient of aluminum is 23.2*10-6 ℃, the diameter of aluminum can range from 12μm to 75μm; the thermal expansion coefficient of copper is 17.5*10 -6 ℃; the diameter of gold can range from 1.45μm to 3.2μm; the thermal conductivity of magnesium is 156W / (m*K); the thermal expansion coefficient of silver is 19.5*10 -6 ℃.

[0112] It is understood that when the heat dissipation material 132 is an alloy material, it can also have at least one of the aforementioned thermal conductivity, thermal expansion coefficient, and diameter. For example, when the heat dissipation material 132 is an aluminum alloy (AlSi10Mg), its thermal conductivity is 140W / (m*K), its thermal expansion coefficient is 2.3*10 -6 ℃, and its diameter can range from 50μm to 120μm.

[0113] By providing the heat dissipation material 132 made of the above-mentioned metal material, when the heat dissipation material 132 has good thermal conductivity, the heat is conducted through the heat dissipation material 132 at a faster rate. When the reflector 130 is mixed with the above-mentioned heat dissipation material 132, the heat dissipation material 132 can conduct the heat to the outside of the reflector 130 at a higher conduction rate, which can quickly reduce the temperature of the reflector 130, thereby preventing the reflector 130 from being deformed due to excessive heat, and further avoiding the temperature drift problem of the laser lens 100, thereby ensuring the picture display effect of the laser device 200.

[0114] When the degree of deformation of the heat dissipation material 132 due to temperature changes is low, when the reflector 130 is mixed with the above-mentioned heat dissipation material 132, under the same degree of temperature change, the heat dissipation material 132 can alleviate the deformation of the reflector 130, avoid the reflector 130 from deforming to a large extent, and thus avoid the temperature drift problem of the laser lens 100, thereby ensuring the picture display effect of the laser device 200; at the same time, it can reduce the probability of damage to each lens in the laser lens 100, thereby increasing the service life of the projection lens.

[0115] When the diameter of the heat dissipation material 132 is small, it can be exposed to the outer surface of the reflector 130 with a smaller probability, thereby reducing the probability of diffuse reflection of light.

[0116] The following description is made by taking the heat dissipation material 132 as a material having the above-mentioned thermal conductivity, thermal expansion coefficient and diameter range as an example, that is, the heat dissipation material 132 satisfies the following conditions: the thermal conductivity is greater than or equal to 5W / (m*K), the thermal expansion coefficient is less than or equal to 60*10 -6 ℃ and its diameter is less than or equal to 1mm.

[0117] Reference Figure 3-Figure 7As shown, in some possible implementations, the reflector 130 further has a non-reflective surface 133 , and the reflective surface 131 and the non-reflective surface 133 are adjacently disposed along an extension direction of the surface of the reflector 130 .

[0118] The non-reflective surface 133 generally includes an edge region outside the light irradiation region to facilitate processing of the reflector 130 . The following description will be made by taking the reflective surface 133 as the light irradiation region as an example.

[0119] The reflective surface 131 includes at least a first area 1311 and a second area 1312 that are adjacent to each other. The light intensity of the first area 1311 is greater than the light intensity of the second area 1312. Both the first area 1311 and the second area 1312 are used to reflect the image light beam emitted from the output end of the lens assembly 120.

[0120] It should be understood that the definitions of first region 1311 and second region 1312 merely refer to different areas of the reflective surface 131 during operation. When the reflector 130 is installed in a different position or the laser lens 100 used therein is changed, the first region 1311 and the second region 1312 may differ. First region 1311 is configured as an area within a more common light propagation path when the reflective surface 131 is operating, i.e., an area with greater illumination intensity. Second region 1312 is configured as an area within a less common light propagation path when the reflective surface 131 is operating, i.e., an area with less illumination intensity.

[0121] Reference Figure 3-Figure 7 As shown, it is understandable that the distribution position of the heat dissipation material 132 can be adjusted according to actual conditions. For example, referring to Figure 7 As shown, the heat dissipation material 132 is distributed only in the first region 1311 where the light power density is relatively concentrated, that is, the light intensity is relatively high. Figure 6 As shown, the heat dissipation material 132 is distributed in both the first area 1311 and the second area 1312 , that is, the heat dissipation material 132 is distributed at each position of the reflective surface 131 .

[0122] It should be noted that the heat dissipation material 132 can be evenly distributed on the reflective surface 131 or only in the first region 1311, or it can be unevenly distributed. This is not limited in the present embodiment. Preferably, a higher density of heat dissipation material 132 is distributed in areas with high optical power density, i.e., high light intensity, to maximize the heat dissipation effect of the reflector 130 while ensuring cost.

[0123] Specifically, in some embodiments, the heat dissipation material 132 is located within the first region 1311. When the reflector 130 is in operation, more light is reflected by the first region 1311. During this process, the first region 1311 tends to generate a lot of heat. The heat dissipation material 132 located within the first region 1311 can transfer the heat to the outside of the reflector 130 at a high conduction rate, quickly reducing the temperature of the reflector 130 and preventing deformation of the reflector 130 due to excessive heat. This, in turn, prevents thermal drift of the laser lens 100, thereby ensuring the display quality of the laser device 200. In other embodiments, the heat dissipation material 132 can be located within the first region 1311 and outside the first region 1311, i.e., the second region 1312. When the reflector 130 is in operation, light is reflected by the first region 1311 and the second region 1312, i.e., the reflective surface 131. During this process, the heat dissipation material 132 can conduct heat to the outside of the reflector 130 at a higher conduction rate, which can quickly reduce the temperature of the reflector 130, prevent the reflector 130 from being deformed due to excessive heat, and further avoid the temperature drift problem of the laser lens 100, thereby ensuring the picture display effect of the laser device 200.

[0124] In a third aspect, the embodiment of the present application further provides a laser lens 100 , which includes a lens holder 110 , a lens assembly 120 , and a reflector 130 ;

[0125] The lens assembly 120 is used to form an image of the incident light; the reflector 130 has a reflective surface 131, which is arranged opposite to the output end of the lens assembly 120 and faces the lens assembly 120. The reflective surface 131 is used to reflect the image light beam emitted from the output end;

[0126] The reflector 130 is made of materials including optical materials and heat dissipation materials 132 . The heat dissipation materials 132 are configured to conduct heat generated by the optical material reflecting light, so as to reduce the temperature of the reflector 130 .

[0127] In the laser lens 100 provided in the embodiment of the present application, the materials used to prepare the reflector 130 include optical materials and heat dissipation materials 132; the heat dissipation material 132 has thermal conductivity better than that of the optical material. In the process of the optical material reflecting light and generating heat, the heat dissipation material 132 can conduct the heat to the outside of the reflector 130, thereby reducing the temperature of the reflector 130 and preventing the reflector 130 from being deformed due to excessive heat, thereby avoiding the problem of temperature drift of the laser lens 100, thereby ensuring the picture display effect of the laser device 200.

[0128] Reference Figure 8As shown, in a fourth aspect, the embodiment of the present application further provides a method for manufacturing a laser lens 100, which is used to manufacture the aforementioned laser lens 100. The method comprises:

[0129] S100, mixing and melting the heat dissipation material and the optical material to form a molten mixed material.

[0130] It is understandable that the method of mixing the heat dissipation material and the optical material can be arbitrary, such as stirring and mixing. The embodiment of the present application does not limit the mixing method of the heat dissipation material and the optical material, nor is it limited to the above examples.

[0131] It should be noted that before mixing the heat dissipation material and the optical material, the optical material, i.e., the optical plastic, may be melted first, and then the heat dissipation material is added and fully blended through the aforementioned mixing method to form a molten mixed material. The molten mixed material has a certain fluidity.

[0132] S200, injecting the molten mixed material into an injection mold to form a reflector;

[0133] S300, coating the surface of the reflector to form a reflective surface;

[0134] It will be appreciated that the position of the reflective surface 131 has been described above, and the position of the coated surface can be referred to in detail, and will not be further described here. It should be noted that the coating may be applied to the entire surface of the reflector 130 facing the lens assembly 120, such as the reflective surface 131. Furthermore, a portion of the non-reflective surface 133 is also coated to provide a margin for the performance of the reflector 130.

[0135] S400. Install the reflector and lens assembly on the lens mount, with the reflective surface facing the lens assembly.

[0136] Through the above-mentioned setting, the heat dissipation material 132 has a thermal conductivity that is better than that of the optical material. In the process of the optical material reflecting light and generating heat, the heat dissipation material 132 can conduct the heat to the outside of the reflector 130, thereby reducing the temperature of the reflector 130 and preventing the reflector 130 from being deformed due to excessive heat, thereby avoiding the temperature drift problem of the laser lens 100, thereby ensuring the picture display effect of the laser device 200.

[0137] Reference Figure 9 As shown, in some possible embodiments, injecting the molten mixed material into the injection mold includes:

[0138] S210. Provide a first injection mold and a second injection mold. The first injection mold and the second injection mold are relatively combined to form an injection cavity and an injection channel. The injection channel is connected to the injection cavity. The injection cavity has a processing surface corresponding to the reflective surface.

[0139] It should be noted that the injection cavity formed by the first injection mold and the second injection mold is adapted to the reflector 130. The first injection mold and the second injection mold can be an upper mold and a lower mold, respectively, or a left mold and a right mold, respectively. The embodiments of the present application do not limit the specific structures of the first injection mold and the second injection mold, nor are they limited to the above examples.

[0140] S220, injecting the molten mixed material into the injection cavity through the injection channel, and setting processing parameters so that the heat dissipation material is distributed at least in the first area of the reflective surface.

[0141] With reference to the above content, the heat dissipation material 132 may be distributed only in the first area 1311 of the light reflecting surface 131, or may be distributed in the entire light reflecting surface 131. Detailed description is omitted here.

[0142] S230 , after the molten mixed material solidifies, demolding the first injection mold and the second injection mold to form a reflector.

[0143] It is understandable that the solidification method can be arbitrary. For example, the solidification can be cooling solidification such as air cooling or water cooling. The embodiment of the present application does not limit the solidification method of the molten mixed material, nor is it limited to the above examples.

[0144] Through the above arrangement, the heat dissipation material 132 can be placed close to the reflective surface 131. The heat dissipation material 132 has better thermal conductivity than the optical material. When the optical material reflects light and generates heat, the heat dissipation material 132 can conduct the heat to the outside of the reflector 130, thereby reducing the temperature of the reflector 130 and preventing deformation of the reflector 130 due to excessive heat. This further prevents temperature drift of the laser lens 100, thereby ensuring the image display effect of the laser device 200.

[0145] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

[0146] For ease of explanation, the above description has been made with reference to specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations are possible. The above embodiments are selected and described to better explain the principles and practical applications, so that those skilled in the art can better utilize the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A laser lens, characterized in that: include: lens mount; A lens assembly, the lens assembly being arranged on the lens mount and being used to form an image of incident light; a reflector, wherein the reflector is arranged on the lens mount; The reflector has a reflective surface, which is arranged opposite to the output end of the lens assembly and faces the lens assembly, and is used to reflect the image light beam emitted from the output end; The reflector is made of materials including heat dissipation material and optical material. The thermal conductivity of the heat dissipation material is greater than that of the optical material. The heat dissipation material is configured to conduct heat generated by the reflector reflecting light to reduce the temperature of the reflector.

2. The laser lens according to claim 1, wherein: The thermal conductivity of the heat dissipation material is greater than or equal to 5 W / (m*K).

3. The laser lens according to claim 1, wherein: The thermal expansion coefficient of the heat dissipation material is less than or equal to 60*10 -6 ℃.

4. The laser lens according to claim 1, wherein: The diameter of the heat dissipation material is less than or equal to 1 mm.

5. The laser lens according to any one of claims 1 to 4, characterized in that: The heat dissipation material includes one or more of graphene, carbon fiber and metal materials.

6. The laser lens according to any one of claims 1 to 4, characterized in that: The reflector further has a non-reflective surface, and the reflective surface and the non-reflective surface are arranged adjacent to each other along the surface extension direction of the reflector; The reflective surface comprises at least a first area and a second area adjacent to each other, wherein the light intensity of the first area is greater than the light intensity of the second area; The heat dissipation material is located in the first region, or the heat dissipation material is located in the first region and the second region.

7. A laser lens, characterized in that: The laser lens comprises a lens holder, a lens assembly and a reflector; The lens assembly is used to image the incident light; The reflector has a reflective surface, which is arranged opposite to the output end of the lens assembly and faces the lens assembly, and is used to reflect the image light beam emitted from the output end; The reflector is made of materials including heat dissipation materials and optical materials. The heat dissipation materials are configured to conduct heat generated by the reflector reflecting light, so as to reduce the temperature of the reflector.

8. A method for preparing a laser lens, characterized in that: include: mixing and melting the heat dissipation material and the optical material to form a molten mixed material; injecting the molten mixed material into an injection mold to form a reflector; Coating a film on the surface of the reflector to form a reflective surface; The reflector and the lens assembly are mounted on a lens mount, with the reflective surface facing the lens assembly.

9. The method for preparing a laser lens according to claim 8, wherein: Injecting the molten mixed material into the injection mold, including: Providing a first injection mold and a second injection mold, wherein the first injection mold and the second injection mold are relatively combined to form an injection cavity and an injection channel, and the injection channel is connected to the injection cavity; wherein the injection cavity has a processing surface corresponding to the reflective surface; Injecting the molten mixed material into the injection cavity through the injection channel, and setting processing parameters so that the heat dissipation material is distributed at least in the first area of the reflective surface; After the molten mixed material is solidified, the first injection mold and the second injection mold are demoulded to form the reflector.

10. A laser device, characterized in that: Comprising the laser lens according to any one of claims 1-7.

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