Laser lens and laser device

Abstract

The embodiment of the invention belongs to the technical field of optical equipment, provides a laser lens and laser equipment, and aims to solve the technical problems that a reflecting lens is poor in heat conductivity and prone to deformation in the prior art. The laser lens comprises a lens seat, a lens assembly and a reflector, the reflector is arranged on the lens seat, the reflector is provided with a first face and a second face, the first face faces the lens assembly, at least part of the first face forms a light reflecting face, and the light reflecting face is configured to reflect image light beams emitted by the lens assembly; the second face is provided with at least one concave area which at least corresponds to part of the reflecting face, and the thickness of the reflecting mirror located in the concave area is smaller than that of the other part of the reflecting mirror. In the laser lens, the concave area is close to air, and heat generated by light on the reflecting mirror can be quickly conducted to the air, so that the temperature of the reflecting mirror is reduced, and the reflecting mirror is prevented from being deformed.

Description

Technical Field

[0001] The embodiments of the present application relate to optical equipment technology, and more particularly to a laser lens and laser equipment. 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 large displays at shorter distances. These lenses include a reflective lens for reflecting light onto the screen. These lenses are typically made of optical plastic, which has poor thermal conductivity. This can lead to excessive heat buildup and deformation. Summary of the Invention

[0003] The embodiments of the present application provide a laser lens and a laser device, which can solve the technical problem that the reflective lens has poor thermal conductivity, resulting in excessive heat and easy deformation of the reflective lens.

[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 disposed on the lens mount, the reflector having a first surface and a second surface disposed opposite to each other in a thickness direction, the first surface facing the lens assembly, at least a portion of the first surface forming a reflective surface, the reflective surface being configured to reflect an image beam emitted by the lens assembly;

[0008] The second surface has at least one recessed area, the recessed area corresponds to at least a portion of the reflective surface, and the thickness of the reflector located in the recessed area is smaller than the thickness of the remaining portion of the reflector.

[0009] In the laser lens of the present embodiment, the reflector has a reflective surface for reflecting light. During operation, the reflector receives light emitted by the lens assembly and changes the light's transmission path to achieve reflection. By providing the reflector with a recessed area close to the external environment, that is, close to the air, the heat generated by the light on the reflector can be quickly transferred to the air, thereby reducing the temperature of the reflector and preventing deformation of the reflector, thereby ensuring the normal operation of the laser lens and laser equipment.

[0010] In some embodiments of the present application, the thickness of the reflector located in the recessed area is h1, the thickness of the remaining portion of the reflector is h2, and the relationship between h1 and h2 is: 1 / 15≤h1 / h2<1.

[0011] With this arrangement, the reflective surface can ensure the structural performance of the reflector while completing the reflection function. Compared with the reflector without a recessed area, the reflector with a recessed area is closer to the external environment, that is, close to the air. The heat generated by the light on the reflector can be conducted to the air more quickly to reduce the temperature of the reflector, thereby avoiding deformation of the reflector, thereby ensuring the normal use of the laser lens and laser equipment.

[0012] In some embodiments of the present application, the reflective surface includes a first reflective area and a second reflective area, the first reflective area is adjacent to the second reflective area, and the light intensity of the first reflective area is greater than the light intensity of the second reflective area;

[0013] The recessed area at least corresponds to the first reflective area.

[0014] In this way, by setting a recessed area in the first reflecting area where the light intensity is greater, the heat generated by the light on the reflector located in the first reflecting area can be conducted to the air more quickly, avoiding the concentrated accumulation of heat on the reflector, thereby reducing the temperature of the reflector and preventing the reflector from deforming, thereby ensuring the normal use of the laser lens and laser equipment.

[0015] In some embodiments of the present application, a blind hole is provided on the second surface, and the blind hole forms the recessed area.

[0016] With this arrangement, the bottom of the blind hole is relatively close to the reflective surface. During the operation of the reflector, the hole bottom with a smaller distance can conduct the heat of the light to the outside of the reflector more quickly, thereby reducing the temperature of the reflector and avoiding deformation of the reflector, thereby ensuring the normal use of the laser lens and laser equipment.

[0017] In some embodiments of the present application, along the axis of the blind hole, the area occupied by the opening of the blind hole on the second surface is s1, the total illuminated area of the second surface is s2, and the relationship between s1 and s2 is: s1 / s2≥1 / 15.

[0018] With this arrangement, the reflector can ensure its structural performance while completing its reflection function. Compared with the light being reflected through the entire reflector, the transmission path of the light from the reflective surface to the second surface is shorter, and the heat generated by the light can be conducted to the air more quickly, which can reduce the temperature of the reflector and thus avoid deformation of the reflector, thereby ensuring the normal use of the laser lens and laser equipment.

[0019] In some embodiments of the present application, there are multiple blind holes, and the multiple blind holes are arranged at intervals along the extension direction of the surface of the reflector;

[0020] And / or, the axis of the blind hole is parallel to the thickness direction of the reflector;

[0021] And / or, the bottom of the blind hole is arranged parallel to the first surface;

[0022] And / or, the reflector is a curved mirror.

[0023] With this arrangement, the hole bottom with a smaller distance can conduct the heat of the light to the outside of the reflector more quickly, thereby reducing the temperature of the reflector and preventing the reflector from deforming, thereby ensuring the normal use of the laser lens and laser equipment; the heat generated by the reflection of the light is evenly distributed, which can avoid heat concentration, thereby reducing the temperature of the reflector and preventing the reflector from deforming, thereby ensuring the normal use of the laser lens and laser equipment.

[0024] In some embodiments of the present application, the bottom area of the blind hole is s3, and the relationship between s1 and s3 is: s1≥s3.

[0025] With this setting, when s1≥s3, the heat generated by the light can be transferred to the air more quickly, which can reduce the temperature of the reflector and prevent the reflector from deforming, thereby ensuring the normal use of the laser lens and laser equipment; if s1<s3, the air flow rate entering the blind hole is low and the heat conduction efficiency is poor.

[0026] In some embodiments of the present application, when s1>s3,

[0027] The aperture of the blind hole gradually increases along the direction from the bottom of the hole to the orifice; or, along the axial direction of the blind hole, the blind hole further has an intermediate hole section located between the bottom of the hole and the orifice, and the aperture of the intermediate hole section is larger than the aperture of the hole bottom and smaller than the aperture of the orifice.

[0028] With this arrangement, the structure of the blind hole is relatively stable, and the air flow rate entering the blind hole through the orifice is relatively fast, which can reduce the temperature of the reflector while ensuring the structural stability of the reflector, thereby ensuring the normal use of the laser lens and laser equipment.

[0029] In a second aspect, an embodiment of the present application provides a laser lens, comprising a lens mount, a lens assembly, and a reflector;

[0030] The lens assembly is used to image the incident light;

[0031] The reflector has a first surface and a second surface disposed opposite to each other in a thickness direction, the first surface faces the lens assembly, at least a portion of the first surface forms a reflective surface, and the reflective surface is configured to reflect the image beam emitted by the lens assembly;

[0032] The second surface has at least one recessed area, which corresponds to at least a portion of the reflective surface. The thickness of the reflector located in the recessed area is smaller than the thickness of the remaining portion of the reflector. The recessed area is used for heat dissipation of the reflector.

[0033] The laser lens provided in the embodiments of the present application has a reflective mirror having a reflective surface for reflecting light. During operation, the reflective surface receives light emitted by the lens assembly and changes the light's transmission path to achieve reflection. By providing a reflector with a recessed area close to the external environment, that is, close to the air, the heat generated by the light on the reflector can be quickly transferred to the air, thereby reducing the temperature of the reflector and preventing deformation of the reflector, thereby ensuring the normal operation of the laser lens and laser equipment.

[0034] In a third aspect, an embodiment of the present application provides a laser device, including the laser lens described above.

[0035] The laser device provided in the embodiments of the present application has a reflective mirror having a reflective surface for reflecting light. During operation, the reflective surface receives light emitted by the lens assembly and changes the light's transmission path to achieve reflection. By providing the reflector with a recessed area, the recessed area is close to the external environment, that is, close to the air. The heat generated by the light on the reflector can be quickly transferred to the air, thereby reducing the temperature of the reflector and preventing deformation of the reflector, thereby ensuring the normal operation of the laser lens and the laser device. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] 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.

[0037] Figure 1-1 Schematic diagram of a laser lens projection imaging process provided by an embodiment of the present invention;

[0038] Figure 1 A schematic diagram of the structure of the laser device provided in an embodiment of the present application;

[0039] Figure 2 A schematic diagram of the structure of the laser lens provided in an embodiment of the present application;

[0040] Figure 3 A schematic structural diagram of a first viewing angle of a first type of reflector of a laser lens provided in an embodiment of the present application;

[0041] Figure 4A schematic diagram of the structure of the second viewing angle of the first reflector of the laser lens provided in an embodiment of the present application;

[0042] Figure 5 for Figure 3 Schematic diagram of the cross-sectional structure at AA';

[0043] Figure 6 A schematic structural diagram of a second type of reflector for a laser lens provided in an embodiment of the present application;

[0044] Figure 7 A schematic structural diagram of a first viewing angle of a third reflector of a laser lens provided in an embodiment of the present application;

[0045] Figure 8 A schematic structural diagram of a second viewing angle of a third reflector of a laser lens provided in an embodiment of the present application;

[0046] Figure 9 for Figure 7 Schematic diagram of the cross-sectional structure at BB';

[0047] Figure 10 A schematic structural diagram of a first viewing angle of a fourth reflector of a laser lens provided in an embodiment of the present application;

[0048] Figure 11 A schematic structural diagram of a second viewing angle of a fourth reflector of a laser lens provided in an embodiment of the present application;

[0049] Figure 12 for Figure 10 Schematic diagram of the cross-sectional structure at CC'.

[0050] Description of reference numerals:

[0051] 10-projection screen; 20-projection lens;

[0052] 200-Laser equipment;

[0053] 210-screen;

[0054] 100-Laser lens;

[0055] 110-lens mount;

[0056] 120-lens assembly;

[0057] 130 - reflector; 131 - first surface; 132 - second surface; 133 - reflective surface; 1331 - first reflective area; 1332 - second reflective area; 134 - recessed area;

[0058] 140-blind hole; 141-hole bottom; 142-hole mouth. DETAILED DESCRIPTION

[0059] 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.

[0060] The projection lens 20 can project an image beam onto the projection screen 10, which 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, with the projection distance S being the axial distance between the projection lens 20 and the projection screen 10). This allows the laser projection device to be placed closer to the wall (the plane where the projection screen is located), enabling the projection of a larger image within a very short projection distance.

[0061] The projection lens with a relatively small projection can be called an ultra-short-throw projection lens.

[0062] Laser equipment typically consists of a light source, an optical engine, and a lens, all connected in sequence to form the core optical system of the laser device. The light source currently uses a laser 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 reflects and shapes the light path 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 then imaged on the projection screen.

[0063] In the embodiment of the present application, the lens is an ultra-short focus lens, which includes a reflective lens for reflecting the light onto the screen. The reflective lens reflects the modulated light beam onto the projection screen. Figure 1-1 As shown, the direction of light beam propagation changes. Reflective lenses are generally made of optical plastic, which has poor thermal conductivity. This results in excessive heat in the reflective lens, which is concentrated and prone to deformation, affecting the image quality and size of the lens.

[0064] In view of this, the laser lens and laser equipment of the embodiments of the present application, the laser lens includes a lens mount; a lens assembly, the lens assembly is arranged on the lens mount, and is used to image the incident light; a reflector, the reflector is arranged on the lens mount, and the reflector has a first surface and a second surface arranged opposite to each other along the thickness direction, the first surface faces the lens assembly, at least a portion of the first surface forms a reflective surface, and the reflective surface is configured to reflect the image light beam emitted by the lens assembly; the second surface has at least one recessed area, the recessed area corresponds to at least a portion of the reflective surface, and the thickness of the reflector located in the recessed area is less than the thickness of the rest of the reflector.

[0065] In the laser lens and laser equipment of the embodiments of the present application, the reflector has a reflective surface for reflecting light. During the operation of the reflector, the reflective surface receives the light emitted by the lens assembly and changes the transmission path of the light to complete the reflection. The second surface has at least one recessed area, and the recessed area corresponds to at least a portion of the reflective surface. The thickness of the reflector located in the recessed area is less than the thickness of the rest of the reflector. By providing a reflector with a recessed area, the recessed area is close to the external environment, that is, close to the air, and the heat generated by the light on the reflector can be conducted to the air more quickly to reduce the temperature of the reflector, thereby avoiding deformation of the reflector, thereby ensuring the normal use of the laser lens and laser equipment.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] Reference Figure 1 As shown, in the first aspect, an embodiment of the present application provides a laser device 200, including a laser lens 100, a light source (not shown in the figure), and a screen 210.

[0074] 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 color images; it can also be a monochromatic light source, displaying color images through different colors of phosphors, filter wheels, etc.

[0075] The lens assembly 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 colors of light. The modulated light is magnified by the lens and then imaged on the projection screen.

[0076] 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.

[0077] Reference Figure 2-Figure 12 As shown, in a second aspect, the embodiment of the present application further 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 for imaging incident light; the reflector 130 is disposed on the lens mount 110. The reflector 130 and the lens assembly 120 may be spaced apart.

[0078] 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.

[0079] 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.

[0080] It will be appreciated that the lens assembly 120 may include varying numbers of lenses.

[0081] Reference Figure 2 As shown, 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 doublet 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.

[0082] Reference Figure 3-Figure 12 As shown, the reflector 130 has a first surface 131 and a second surface 132 arranged opposite to each other along the thickness direction. The first surface 131 faces the lens assembly 120. At least a portion of the first surface 131 forms a reflective surface 133, which is configured to reflect the image beam emitted by the lens assembly.

[0083] It is understandable that the reflective surface 133 may refer to the entire first surface 131 or a portion of the first surface 131. The first surface 131 of the reflector 130 generally includes an edge region outside the light irradiation region to facilitate processing of the reflector 130.

[0084] The following description will be made by taking the reflective surface 133 as the light irradiation area of the first surface 131 as an example.

[0085] It should be noted that the reflective surface 133 may change with the working condition of the reflector 130 , and therefore the embodiment of the present application does not limit the specific condition of the reflective surface 133 , nor is it limited to the above example.

[0086] The second surface 132 has at least one recessed area 134 .

[0087] It is understandable that the number of recessed areas 134 can be arbitrary. For example, the number of recessed areas 134 can be one, two, three, four, etc. The embodiment of the present application does not limit the specific number of recessed areas 134, nor is it limited to the above examples.

[0088] It should be noted that the recessed area 134 may refer to a portion that is recessed relative to the outer surface of the reflector 130. In this case, the recessed area 134 may refer to a groove, a hole, or a recessed portion within a structure extending in a concave-convex manner. The present embodiment of the present application does not impose a specific definition on the recessed area 134, nor is it limited to the above example.

[0089] The recessed area 134 corresponds to at least a portion of the reflective surface 133 . The thickness of the reflector 130 located in the recessed area 134 is smaller than the thickness of the remaining portion of the reflector 130 . The remaining portion of the reflector 130 refers to the portion of the reflector 130 without the recessed area 134 .

[0090] By providing the reflector 130 with the aforementioned reflective surface 133 and recessed area 134, during operation, the reflector receives light emitted by the lens assembly 120 and changes the light's transmission path to achieve reflection. By providing the reflector 130 with the recessed area 134, the recessed area 134 is close to the external environment, i.e., the air. Heat generated by light on the reflector 130 can be quickly transferred to the air, thereby reducing the temperature of the reflector 130 and preventing deformation of the reflector 130, thereby ensuring normal operation of the laser lens 100 and the laser device 200.

[0091] Reference Figure 3-Figure 12 As shown, in some possible implementations, the thickness of the reflector 130 located in the recessed area 134 is h1, and the thickness of the remaining portion of the reflector 130 is h2. The relationship between h1 and h2 is: 1 / 15≤h1 / h2<1.

[0092] It can be understood that the specific ratio between h1 and h2 can be 1 / 15, 1 / 14, 1 / 13, 1 / 12, 1 / 11, 1 / 10, 1 / 9, 1 / 8, 1 / 7, 1 / 6, 1 / 5, 1 / 4, 1 / 3, 1 / 2, etc. The embodiment of the present application does not limit the specific ratio between h1 and h2, nor is it limited to the above examples.

[0093] It should be noted that when the ratio between h1 and h2 is less than 1 / 15, the distance between the recessed area 134 and the reflective surface 133 is too small, and the reflective function of the reflector 130 may not be completed. At the same time, it may affect the structural strength of the reflector 130, and the service life of the reflector 130 is short, which in turn causes damage to the laser lens 100 and high costs.

[0094] It can be understood that by adopting the above-mentioned ratio of h1 and h2, the reflective surface 133 can ensure the structural performance of the reflector 130 while completing the reflection function. Compared with the reflector 130 without the recessed area 134, the reflector 130 with the recessed area 134 is closer to the external environment, that is, close to the air. The heat generated by the light on the reflector 130 can be conducted to the air more quickly to reduce the temperature of the reflector 130, thereby avoiding deformation of the reflector 130, thereby ensuring the normal use of the laser lens 100 and the laser equipment 200.

[0095] Reference Figure 6 As shown, in some possible implementations, the reflective surface 133 may include a plurality of reflective areas, and the plurality of reflective areas may be adjacently arranged and all used to reflect light.

[0096] In the embodiment of the present application, the reflective surface 133 includes a first reflective area 1331 and a second reflective area 1332 , and the light intensity of the first reflective area 1331 is greater than the light intensity of the second reflective area 1332 .

[0097] It is understandable that the number of the first reflection areas 1331 and the second reflection areas 1332 can be arbitrary and will vary according to actual conditions, which will not be elaborated here.

[0098] The following description takes as an example that there are two first reflective regions 1331 , one second reflective region 1332 , and the two first reflective regions 1331 are located at two opposite sides of the bottom of the second reflective region 1332 .

[0099] The recessed area 134 at least corresponds to the first reflective area 1331 .

[0100] It should be noted that when the light intensity in the reflective area is relatively high, the heat generated by the light passing through the reflective area is relatively high.

[0101] It can be understood that by setting a recessed area 134 in the first reflection area 1331 where the light intensity is greater, the heat generated by the light on the reflector 130 located in the first reflection area 1331 can be conducted to the air more quickly, avoiding the concentrated accumulation of heat in the reflector 130, thereby reducing the temperature of the reflector 130 and further avoiding deformation of the reflector 130, thereby ensuring the normal use of the laser lens 100 and the laser equipment 200.

[0102] It is understandable that, referring to Figure 3-Figure 12 As shown, in some possible implementations, a blind hole 140 is provided on the second surface 132 , and the blind hole 140 forms a recessed area 134 .

[0103] It should be noted that when the blind hole 140 forms the aforementioned recessed area 134, the orifice 142 of the blind hole 140 can be set on the second surface 132, and the hole bottom 141 can be connected to the outside of the reflector 130, that is, the air, through the orifice 142. At this time, compared with the reflector 130 without a recessed area 134, the heat that can be generated by light on the reflector 130 with the recessed area 134 can be conducted to the air more quickly, so as to complete the heat conduction more quickly, thereby reducing the temperature of the reflector 130 and avoiding deformation of the reflector 130.

[0104] It can be understood that the shape of the hole bottom 141 can be arbitrary, that is, the shape of the second surface 132 can be arbitrary. For example, the shape of the hole bottom 141 can be circular, square, triangular, rectangular, etc. The embodiment of the present application does not limit the shape of the hole bottom 141, nor is it limited to the above examples.

[0105] By forming the above-mentioned blind hole 140, the bottom 141 of the blind hole 140 is relatively close to the reflective surface 133. During the operation of the reflector 130, the bottom 141 with a smaller distance can quickly conduct the heat of the light to the outside of the reflector 130, so as to reduce the temperature of the reflector 130 and avoid deformation of the reflector 130, thereby ensuring the normal use of the laser lens 100 and the laser device 200.

[0106] Reference Figure 3-Figure 12 As shown, in some possible implementations, the area occupied by the opening 142 of the blind hole 140 on the second surface 132 is s1, the total area of the illuminated region of the second surface 132 is s2, and the relationship between s1 and s2 is: s1 / s2≥1 / 15.

[0107] It is understood that the total area of the illuminated region of the second surface 132 includes the area occupied by the opening 142 of the blind hole 140 on the second surface 132, as well as the area of the second surface 132 not provided with the recessed area 134. The first surface 131 of the reflector 130 typically includes an edge region located in the illuminated region to facilitate processing of the reflector 130. Correspondingly, the second surface 132 typically also includes an edge region outside the illuminated region.

[0108] It should be noted that the relationship between s1 and s2 is equivalent to the opening density of the blind hole 140. For example, when the ratio s1 / s2 is smaller, the opening density of the blind hole 140 is smaller; when the ratio s1 / s2 is larger, the opening density of the blind hole 140 is larger.

[0109] It is understandable that the specific ratio of s1 / s2 can be 1 / 15, or 1 / 15, 1 / 14, 1 / 13, 1 / 12, 1 / 11, 1 / 10, 1 / 9, 1 / 8, 1 / 7, 1 / 6, 1 / 5, 1 / 4, 1 / 3, 1 / 2, etc. The embodiments of the present application do not limit the specific ratio of s1 to s2, nor are they limited to the above examples.

[0110] It should be noted that the value of s2 is related to the reflector 130. When the blind hole 140 is opened with the above ratio, the reflector 130 can complete its reflection function while maintaining its structural performance. The hole bottom 141, which is closer, can quickly conduct the heat of the light to the outside of the reflector 130, thereby reducing the temperature of the reflector 130 and preventing deformation of the reflector 130, thereby ensuring the normal operation of the laser lens 100 and the laser device 200.

[0111] In some possible implementations, the number of the blind hole 140 is one, and the shape and form of the blind hole 140 can refer to the above description and will not be repeated here.

[0112] Reference Figure 3-Figure 12 As shown, in some other possible implementations, there are multiple blind holes 140 , and the multiple blind holes 140 are arranged at intervals along the extension direction of the surface of the reflector 130 .

[0113] It is understandable that the spacing direction of the plurality of blind holes 140 can be arbitrary. For example, the plurality of blind holes 140 can be spaced apart in the horizontal direction; for another example, the plurality of blind holes 140 can be spaced apart in the vertical direction; for another example, the plurality of blind holes 140 can be spaced apart along the edge extension direction of the reflector 130. The embodiment of the present application does not limit the specific spacing direction of the plurality of blind holes 140, nor is it limited to the above examples. Among them, the horizontal direction and the vertical direction are respectively Figure 3 、 Figure 7 as well as Figure 10 X and Y in .

[0114] The interval setting may be a uniform interval setting or a non-uniform interval setting, and the user may adjust it according to the actual situation, which will not be described in detail here.

[0115] It should be noted that when there are multiple blind holes 140, the cross-sectional shapes of the blind holes 140 along the direction perpendicular to the axis can be the same or different. For example, the cross-sectional shapes of the multiple blind holes 140 can all be regular hexagons and of the same size; for another example, the cross-sectional shapes of the multiple blind holes 140 can all be rectangular and of different sizes; for another example, the cross-sectional shapes of the multiple blind holes 140 can all be square and of the same size. The embodiments of the present application do not limit the specific shape of the blind holes 140, nor are they limited to the above examples.

[0116] It is understood that when there are multiple blind holes 140, the depths of the blind holes 140 may be the same or different. For example, the depths of the multiple blind holes 140 may be the same; for another example, the depths of the multiple blind holes 140 may be different. In some embodiments, some blind holes 140 may have the same depth, while another portion of blind holes 140 may have different depths. In other embodiments, the depths of the multiple blind holes 140 may all be different.

[0117] It should be noted that, when there are multiple blind holes 140 , in order to adapt to different application scenarios and requirements, the hole depth distribution of the blind holes 140 can be adjusted accordingly according to the energy distribution of the light. Exemplarily, when the energy of the light is more concentrated at the bottom of the reflector 130, the hole depth of the blind hole 140 at the corresponding position is larger, that is, the distance between the reflective surface 133 and the recessed area 134 at the corresponding position is smaller, and the transmission path of the light from the reflective surface 133 to the second surface 132 is shorter. The heat generated by the light can be conducted to the air more quickly, which can reduce the temperature of the reflector 130 and thus avoid deformation of the reflector 130, thereby ensuring the normal use of the laser lens 100 and the laser device 200; another exemplary embodiment, when the energy of the light is more concentrated in the middle of the reflector 130, the openings 142 of the multiple blind holes 140 can also be replaced with evenly spaced ones arranged on the away surface to increase the contact area between the reflector 130 and the air. The heat generated by the light can be conducted to the air more quickly, which can reduce the temperature of the reflector 130 and thus avoid deformation of the reflector 130, thereby ensuring the normal use of the laser lens 100 and the laser device 200.

[0118] By providing a reflector 130 with multiple blind holes 140, the distance between the reflective surface 133 and the recessed area 134 is small. The hole bottom 141 with a smaller distance can conduct the heat of the light to the outside of the reflector 130 more quickly, thereby reducing the temperature of the reflector 130 and preventing the reflector 130 from deforming, thereby ensuring the normal use of the laser lens 100 and the laser device 200.

[0119] In some possible implementations, the axis of the blind hole 140 is parallel to the thickness direction of the reflector 130 , that is, the blind hole 140 may be opened along the thickness direction of the reflector 130 .

[0120] Through the above-mentioned setting, the bottom 141 of the blind hole 140 is closer to the reflective surface 133, which can further reduce the distance between the bottom 141 of the blind hole 140 and the reflective surface 133, which is conducive to faster conduction of the heat of the light to the outside of the reflector 130, so as to reduce the temperature of the reflector 130 and avoid deformation of the reflector 130, thereby ensuring the normal use of the laser lens 100 and the laser device 200.

[0121] Reference Figure 3-Figure 11 As shown, in some possible implementations, the hole bottom 141 is arranged parallel to the light reflecting surface 133 , that is, the surface extension direction of the hole bottom 141 is parallel to the surface extension direction of the light reflecting surface 133 .

[0122] It should be noted that when the hole bottom 141 is parallel to the reflective surface 133, each position on the hole bottom 141 is parallel to the reflective surface 133, and the distance between each position on the hole bottom 141 and the corresponding portion of the reflective surface 133 is equal. During the operation of the reflector 130, the heat generated by the reflection of light is evenly distributed, which can prevent heat concentration, reduce the temperature of the reflector 130, and further prevent deformation of the reflector 130, thereby ensuring the normal operation of the laser lens 100 and the laser device 200.

[0123] Reference Figure 3-Figure 12 As shown, in some possible implementations, the reflector 130 is a curved mirror. Exemplarily, the reflector 130 can 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, nor is it limited to the above examples.

[0124] The following description will be made by taking the reflector 130 as a free-form surface reflector as an example.

[0125] Reference Figures 8-11 As shown, in some possible implementations, the bottom area of the blind hole 140 is s3, and the relationship between s1 and s3 is: s1 ≥ s3.

[0126] It will be appreciated that in some embodiments, when s1>s3, the area occupied by the blind hole opening 142 on the second surface 132 is larger than the bottom area of the blind hole 140. That is, in the blind hole 140, the diameter at the opening 142 is larger than the diameter at the bottom 141. In this case, the air entering the blind hole 140 through the opening 142 flows faster, and the time required for the bottom 141 to come into contact with the air is shortened. The heat generated by the light can be transferred to the air more quickly, reducing the temperature of the reflector 130 and preventing deformation of the reflector 130, thereby ensuring normal operation of the laser lens 100 and the laser device 200.

[0127] Reference Figure 3-Figure 7 、 Figures 9-11 As shown, in some other embodiments, when s1=s3, the area occupied by the orifice 142 of the blind hole on the second surface 132 is equal to the bottom area of the blind hole 140, that is, in the blind hole 140, the diameter at the orifice 142 is equal to the diameter at the bottom 141.

[0128] It can be understood that if s1 < s3, the air flow rate entering the blind hole 140 is low and the heat conduction efficiency is poor.

[0129] Reference Figures 8-11 As shown, in some possible embodiments, the aperture of the blind hole 140 gradually increases from the bottom 141 toward the opening 142. In this case, the area occupied by the opening 142 of the blind hole on the second surface 132 is larger than the bottom area of the blind hole 140, i.e., s1>s3. In this case, the blind hole 140 is a tapered hole, which provides good airflow, facilitating air flow into the blind hole 140 through the opening 142, thereby ensuring heat conduction and reducing the temperature of the reflector 130. This can reduce the temperature of the reflector 130 and prevent deformation of the reflector 130, thereby ensuring normal operation of the laser lens 100 and the laser device 200.

[0130] In some possible embodiments, blind hole 140 further includes an intermediate section (not shown) located between bottom 141 and opening 142 along its axis. The diameter of the intermediate section is larger than that of bottom 141 and smaller than that of opening 142. In other words, blind hole 140 is a stepped hole, allowing heat to be conducted in a stepped manner. This improves the stability of heat conduction, reduces the temperature of reflector 130, and prevents deformation of reflector 130, thereby ensuring normal operation of laser lens 100 and laser device 200.

[0131] Reference Figure 2As shown, in a third aspect, the embodiment of the present application further provides a laser lens 100, comprising a lens holder 110, a lens assembly 120, and a reflector 130. The lens assembly 120 is used to image incident light. The reflector 130 has a first surface 131 and a second surface 132 disposed opposite to each other along the thickness direction. The first surface 131 faces the lens assembly 120, and at least a portion of the first surface 131 forms a reflective surface 133. The reflective surface 133 is configured to reflect the image beam emitted by the lens assembly 120.

[0132] The second surface has at least one recessed area 134 , which corresponds to at least a portion of the reflective surface 133 . The thickness of the reflector 130 in the recessed area 134 is smaller than the thickness of the rest of the reflector 130 . The recessed area 134 is used for heat dissipation of the reflector.

[0133] By providing the reflector 130 with the aforementioned reflective surface 133 and recessed area 134, the reflector 130 has a reflective surface 133 for reflecting light. During operation of the reflector 130, the reflective surface 133 receives light emitted by the lens assembly 120 and changes the light's transmission path to achieve reflection. By providing the reflector 130 with the recessed area 134, the recessed area 134 is close to the external environment, i.e., close to the air. Heat generated by light on the reflector 130 can be quickly transferred to the air, thereby reducing the temperature of the reflector 130 and preventing deformation of the reflector 130, thereby ensuring normal operation of the laser lens 1 and the laser device 200.

[0134] 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.

[0135] 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 disposed on the lens mount, the reflector having a first surface and a second surface disposed opposite to each other in a thickness direction, the first surface facing the lens assembly, at least a portion of the first surface forming a reflective surface, the reflective surface being configured to reflect an image beam emitted by the lens assembly; The second surface has at least one recessed area, the recessed area corresponds to at least a portion of the reflective surface, and the thickness of the reflector located in the recessed area is smaller than the thickness of the remaining portion of the reflector.

2. The laser lens according to claim 1, wherein: The thickness of the reflector located in the recessed area is h1, and the thickness of the remaining portion of the reflector is h2. The relationship between h1 and h2 is: 1 / 15≤h1 / h2<1.

3. The laser lens according to claim 1, wherein: The reflective surface includes a first reflective area and a second reflective area, the first reflective area is adjacent to the second reflective area, and the light intensity of the first reflective area is greater than the light intensity of the second reflective area; The recessed area at least corresponds to the first reflective area.

4. The laser lens according to any one of claims 1 to 3, characterized in that: A blind hole is provided on the second surface, and the blind hole forms the recessed area.

5. The laser lens according to claim 4, characterized in that: The area occupied by the opening of the blind hole on the second surface is s1, the total area of the illuminated region of the second surface is s2, and the relationship between s1 and s2 is: s1 / s2≥1 / 15.

6. The laser lens according to claim 5, characterized in that: There are multiple blind holes, and the multiple blind holes are arranged at intervals along the extending direction of the surface of the reflector; And / or, the axis of the blind hole is parallel to the thickness direction of the reflector; And / or, the bottom of the blind hole is arranged parallel to the first surface; And / or, the reflector is a curved mirror.

7. The laser lens according to claim 5, wherein: The bottom area of the blind hole is s3, and the relationship between s1 and s3 is: s1≥s3.

8. The laser lens according to claim 7, wherein: When s1>s3, The aperture of the blind hole gradually increases along the direction from the bottom of the hole to the orifice; or, along the axial direction of the blind hole, the blind hole further has an intermediate hole section located between the bottom of the hole and the orifice, and the aperture of the intermediate hole section is larger than the aperture of the hole bottom and smaller than the aperture of the orifice.

9. A laser lens, characterized in that: Includes lens mount, lens assembly and reflector; The lens assembly is used to image the incident light; The reflector has a first surface and a second surface disposed opposite to each other in a thickness direction, the first surface faces the lens assembly, at least a portion of the first surface forms a reflective surface, and the reflective surface is configured to reflect the image beam emitted by the lens assembly; The second surface has at least one recessed area, which corresponds to at least a portion of the reflective surface. The thickness of the reflector located in the recessed area is smaller than the thickness of the remaining portion of the reflector. The recessed area is used for heat dissipation of the reflector.

10. A laser device, characterized in that: Comprising the laser lens according to any one of claims 1-9.

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