Optical module and optical system

Abstract

An optical module and an optical system. The optical module comprises at least two stacks of light sources (10), a prism (20) provided on the emergent side of the two stacks of light sources (10), a light adjusting element provided on the emergent side of the prism (20), and a light guide element (40) provided on the emergent side of the light adjusting element. Light beams emitted by the at least two stacks of light sources (10) are combined by the prism (20) and then are incident on the light adjusting element. The light beams are diverged or converged by the light adjusting element and then enter the light guide element (40). The light guide element (40) performs at least one total reflection on the light beams to then obtain uniform light spots on a receiving surface. A geometric connection critical point at which the light beams emitted by the at least two stacks of light sources (10) generate a first energy superposition is a first position, and the prism (20) and the light adjusting element are respectively located on opposite sides of the first position. According to the optical module, the heat dissipation effect of the optical module can be improved, and the uniformity of output light spots can be improved, thereby improving the application flexibility of the optical module. The optical system comprises the optical module.

Description

Optical modules and optical systems Technical Field

[0001] The present invention relates to the field of optical technology, and in particular to an optical module and an optical system. Background Art

[0002] Semiconductor lasers, with their advantages of small size, light weight, low cost, and high efficiency, are widely used in mechanical processing, medical aesthetics, communications, military, and other fields. For example, in the field of laser medical aesthetics, the beam emitted by a semiconductor laser is often processed to obtain a light spot with a specific shape.

[0003] Laser medical applications primarily focus on freckle removal and hair removal. However, the compact structure of existing optical modules makes it difficult to install small heat dissipation structures within them. This can lead to localized overheating within the module, resulting in poor heat dissipation for the entire module. Furthermore, the spot uniformity of existing semiconductor laser devices significantly limits their application.

[0004] Summary of the Invention

[0005] An object of the present invention is to provide an optical module and an optical system, which can improve the heat dissipation effect of the optical module and the uniformity of the output light spot, thereby improving the application flexibility of the optical module.

[0006] The embodiment of the present invention is achieved as follows:

[0007] One aspect of the present invention provides an optical module comprising at least two stacked arrays of light sources, a prism disposed on the light-emitting side of the two stacked arrays of light sources, a dimming element disposed on the light-emitting side of the prism, and a light-guiding element disposed on the light-emitting side of the dimming element. Light beams emitted by the at least two stacked arrays of light sources are combined by the prism and incident on the dimming element. The dimming element diverges or converges the light beams before incident on the light-guiding element. The light-guiding element totally reflects the light beams at least once to produce a uniform light spot on a receiving surface. The geometric connection threshold where the light beams emitted by the at least two stacked arrays generate a first energy superposition is a first position, and the prism and dimming element are located on opposite sides of the first position. This optical module can improve the heat dissipation of the optical module and the uniformity of the output light spot, thereby increasing the application flexibility of the optical module.

[0008] Optionally, the optical module further includes at least two fast-axis compression lens groups, which correspond one-to-one to the at least two stacked light sources and are used to compress the light beam emitted by each stacked light source in the fast-axis direction.

[0009] Optionally, the stacked light source includes a plurality of bars stacked in sequence; the fast-axis compression mirror group includes a plurality of fast-axis compression mirrors, which are arranged one-to-one on the light-emitting sides of the plurality of bars to compress the light beam emitted by each bar in the fast-axis direction.

[0010] Optionally, at least two stacked arrays of light sources are linearly arranged along a first direction, and the prism is used to combine the light beams emitted by the at least two stacked arrays of light sources in the first direction;

[0011] Alternatively, at least two stacked light sources are arranged in an array along a first direction and a second direction; the prism includes a first prism unit and a second prism unit, the first prism unit is used to combine the light beams emitted by the at least two stacked light sources in the first direction, and the second prism unit is used to combine the light beams emitted by the at least two stacked light sources in the second direction.

[0012] Optionally, the dimming element is a negative lens, and the concave surface of the negative lens faces the prism.

[0013] Optionally, the dimming element is a positive lens, and the convex surface of the positive lens faces the prism.

[0014] Optionally, the positive lens is a cylindrical lens or a spherical lens.

[0015] Optionally, the light-guiding element is an optical waveguide or a reflection cavity formed by a plurality of reflection surfaces.

[0016] Optionally, the optical module includes a fixed group and a plurality of replacement groups, wherein the plurality of replacement groups are used to replace the light-emitting side of the fixed group;

[0017] At least two stacked array light sources and prisms are located in a fixed group; the dimming element and the light-guiding element are located in a replaceable group; wherein the light-guiding elements of any two replaceable groups are different, and / or the dimming elements of any two replaceable groups have different deflection angles for the light beam.

[0018] Another aspect of the present invention provides an optical system, which includes the above-mentioned optical module.

[0019] The beneficial effects of the present invention include:

[0020] The optical module provided by the present application includes at least two stacked arrays of light sources, a prism arranged on the light-emitting side of the two stacked arrays of light sources, a dimming element arranged on the light-emitting side of the prism, and a light-guiding element arranged on the light-emitting side of the dimming element; the light beams emitted by the at least two stacked arrays of light sources are combined by the prism and incident on the dimming element, the dimming element diverges or converges the light beams and then incident on the light-guiding element, the light-guiding element totally reflects the light beams at least once to obtain a uniform light spot on the receiving surface; the geometric connection critical point where the light beams emitted by the at least two stacked arrays of light sources produce the first energy superposition is the first position, and the prism and the dimming element are respectively located on two opposite sides of the first position. The present application sets a dimming element, so that the light beam emitted by the prism can be diverged or converged by the dimming element. In this way, a suitable dimming element can be selected as needed to change the size of the light spot of the light beam emitted by the optical module on the receiving surface. The present application can realize the output of a light spot of a preset size according to the needs of the user through the setting of the dimming element; the present application also sets a light-guiding element on the light-emitting side of the dimming element, and the light-guiding element can perform at least one total reflection on the light beam, so that the uniformity of the light beam can be improved; in addition, the present application sets the prism and the dimming element on opposite sides of the first position respectively, so that the dimming element is located after the first position, so that space for installing a heat dissipation structure can be reserved between the prism and the dimming element of the optical module, so that the heat dissipation effect of the optical module can be improved, thereby improving the application flexibility of the optical module. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0022] FIG1 is a schematic structural diagram of a first optical module provided by an embodiment of the present invention;

[0023] FIG2 is a schematic diagram of the optical path of the optical module in FIG1 in a first direction;

[0024] FIG3 is a schematic diagram of the optical path of the optical module in FIG1 in a second direction;

[0025] FIG4 is a schematic structural diagram of a second optical module provided by an embodiment of the present invention;

[0026] FIG5 is a schematic diagram of the optical path of the optical module in FIG4 in a first direction;

[0027] FIG6 is a schematic diagram of the optical path of the optical module in FIG4 in the second direction;

[0028] FIG7 is a schematic structural diagram of a third optical module provided by an embodiment of the present invention;

[0029] FIG8 is a schematic diagram of the optical path of the optical module in FIG7 in a first direction;

[0030] FIG9 is a schematic diagram of the optical path of the optical module in FIG7 in the second direction;

[0031] FIG10 is a schematic diagram of one of the optical paths of the fixed group and the replacement group of the optical module provided in an embodiment of the present invention;

[0032] FIG11 is a second schematic diagram of the optical paths of the fixed group and the replacement group of the optical module provided in an embodiment of the present invention;

[0033] FIG12 is a third schematic diagram of the optical paths of the fixed group and the replacement group of the optical module provided by an embodiment of the present invention.

[0034] Icon: 10-stacked light source; 20-prism; 31-negative lens; 32-positive lens; 40-light guide element; 100-fixed group; 200-replaceable group. DETAILED DESCRIPTION

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0038] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0040] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0041] Referring to Figures 1 to 3, this embodiment provides an optical module comprising at least two stacked arrays of light sources 10, a prism 20 disposed on the light-emitting side of the two stacked arrays of light sources 10, a dimming element disposed on the light-emitting side of the prism 20, and a light-guiding element 40 disposed on the light-emitting side of the dimming element. Light beams emitted by the at least two stacked arrays of light sources 10 are combined by the prism 20 and incident on the dimming element. The dimming element diverges or converges the light beams before incident on the light-guiding element 40. The light-guiding element 40 performs at least one total reflection on the light beams to produce a uniform light spot on a receiving surface. The geometric connection threshold where the light beams emitted by the at least two stacked arrays of light sources 10 produce the first energy superposition is a first position, with the prism 20 and the dimming element located on opposite sides of the first position. This optical module can improve the heat dissipation of the optical module and increase the uniformity of the output light spot, thereby increasing the application flexibility of the optical module.

[0042] The optical module provided by the present application includes at least two stacked light sources 10, a prism 20, a dimming element, and a light guide element 40. The prism 20, the dimming element, and the light guide element 40 are sequentially arranged on the light-emitting side of the stacked light source 10.

[0043] The stacked array light sources 10 include at least two. For example, the number of stacked array light sources 10 can be two, three, four, or more. In this embodiment, the multiple stacked array light sources 10 can be arranged linearly or in an array. This is not limited in this application, and those skilled in the art can configure them according to actual needs.

[0044] Furthermore, it should be noted that each stacked light source 10 includes a plurality of bars stacked in sequence, as shown in FIG1 .

[0045] The prism 20 is disposed on the light-emitting side of the stacked light source 10. It should be noted that the light beam emitted by each stacked light source 10 can be incident on the prism 20. The prism 20 is used to combine the light beams emitted by the multiple stacked light sources 10 in a first direction and / or a second direction. The first direction can be the fast axis direction, and the second direction can be the slow axis direction; alternatively, the first direction can be the slow axis direction, and the second direction can be the fast axis direction.

[0046] Optionally, the arrangement of the multiple stacked light sources 10 can be a linear arrangement or an array arrangement, as follows:

[0047] The first case: at least two stacked arrays of light sources 10 are linearly arranged along a first direction, and the prism 20 is used to combine the light beams emitted by the at least two stacked arrays of light sources 10 in the first direction, as shown in FIG. 1 to FIG. 9 .

[0048] That is, in this case, the plurality of stacked light sources 10 are arranged linearly along the first direction, so that the prism 20 only needs to combine the light beams emitted by two adjacent stacked light sources 10 in the first direction.

[0049] The first direction may be a fast axis direction or a slow axis direction, and this application does not impose any limitation on this.

[0050] The second situation: at least two stacked light sources 10 are arranged in an array along the first direction and the second direction; the prism 20 includes a first prism 20 unit and a second prism 20 unit, the first prism 20 unit is used to combine the light beams emitted by the at least two stacked light sources 10 in the first direction, and the second prism 20 unit is used to combine the light beams emitted by the at least two stacked light sources 10 in the second direction.

[0051] That is, in this case, the multiple stacked light sources 10 are arranged in an array. In this case, there are gaps between the multiple stacked light sources 10 in both the first and second directions. To combine the light beams in both the first and second directions and eliminate the gaps, the prism 20 can be configured to include a first prism 20 unit and a second prism 20 unit. Thus, the first prism 20 unit can be used to combine the light beams in the first direction, and the second prism 20 unit can be used to combine the light beams in the second direction.

[0052] The first direction may be a fast axis direction, and the second direction may be a slow axis direction; or the first direction may be a slow axis direction, and the second direction may be a fast axis direction.

[0053] The above-mentioned dimming element is located on the light-emitting side of the prism 20, and in this embodiment, the dimming element is located on the side away from the prism 20 in the first position, that is, the dimming element is located behind the first position, as shown in Figures 2 and 3, Figures 5 and 6, or Figures 8 and 9.

[0054] It should be noted that the first position is the collective connection critical point where the light beams emitted by the multiple stacked light sources 10 generate the first energy superposition. As shown in FIG2 , the first position is located between the prism 20 and the dimming element.

[0055] The present application sets a dimming element on the light-emitting side of the prism 20, so that the dimming element can diverge or converge the light beam, thereby adjusting the size of the combined light beam, so that a light spot of a preset size can be obtained on the receiving surface; in addition, the present application sets the dimming element after the first position, so that, compared with setting the dimming element before the first position, a certain space can be reserved between the prism 20 and the dimming element, and the space can be used to reserve installation space for the heat dissipation device, so that the heat dissipation pressure of the optical module with a relatively compact structure can be reduced, and the working reliability and life of the optical module can be improved.

[0056] The light guide element 40 is disposed on the light-emitting side of the dimming element. The light guide element 40 is used to guide the light beam emitted by the dimming element to the receiving surface.

[0057] Alternatively, the light guide element 40 may be an optical waveguide; or the light guide may be a reflective cavity formed by a plurality of reflective surfaces. In this way, the light guide element 40 can effectively homogenize the light beam, thereby improving the homogenization degree of the light beam, so that the light beam emitted from the light guide element 40 forms a uniform spot on the receiving surface.

[0058] The light guide element 40 , whether it is an optical waveguide or a reflective cavity, can perform at least one total reflection on the light beam, thereby improving the homogenization degree of the light beam.

[0059] In summary, the optical module provided by the present application includes at least two stacked array light sources 10, a prism 20 arranged on the light-emitting side of the two stacked array light sources 10, a dimming element arranged on the light-emitting side of the prism 20, and a light-guiding element 40 arranged on the light-emitting side of the dimming element; the light beams emitted by the at least two stacked array light sources 10 are combined by the prism 20 and then incident on the dimming element, the dimming element diverges or converges the light beams and then incident on the light-guiding element 40, the light-guiding element 40 performs at least one total reflection on the light beam to obtain a uniform light spot on the receiving surface; the geometric connection critical point where the light beams emitted by the at least two stacked array light sources 10 produce the first energy superposition is the first position, and the prism 20 and the dimming element are respectively located on two opposite sides of the first position. The present application sets a dimming element, so that the light beam emitted by the prism 20 can be diverged or converged by the dimming element. In this way, a suitable dimming element can be selected as needed to change the size of the light spot of the light beam emitted by the optical module on the receiving surface. The present application can realize the output of a light spot of a preset size according to the needs of the user through the setting of the dimming element; the present application also sets a light-guiding element 40 on the light-emitting side of the dimming element, and the light-guiding element 40 can perform at least one total reflection on the light beam, so that the uniformity of the light beam can be improved; in addition, the present application sets the prism 20 and the dimming element on opposite sides of the first position respectively, so that the dimming element is located after the first position, so that space for installing a heat dissipation structure can be reserved between the prism 20 and the dimming element of the optical module, so that the heat dissipation effect of the optical module can be improved, thereby improving the application flexibility of the optical module.

[0060] Optionally, the optical module further includes at least two fast-axis compression lens groups, which correspond one-to-one to at least two stacked light sources 10 and are used to compress the light beam emitted by each stacked light source 10 in the fast-axis direction.

[0061] The number of fast-axis compression lens groups is equal to the number of stacked light sources 10. In this embodiment, each fast-axis compression lens group corresponds to each stacked light source 10, with the fast-axis compression lens group positioned on the light-emitting side of the stacked light source 10. Thus, each fast-axis compression lens group compresses the light beam emitted by its corresponding stacked light source 10 in the fast-axis direction. This reduces the difference in divergence angle between the fast and slow axes of the light beam, thereby improving the uniformity of the light spot produced by the optical module on the receiving surface.

[0062] In this embodiment, the stacked light source 10 includes a plurality of sequentially stacked bars. The fast-axis compression lens assembly includes a plurality of fast-axis compression mirrors, each correspondingly positioned on the light-emitting side of each bar, for compressing the light beam emitted from each bar along the fast axis. For example, if the stacked light source 10 includes five bars, each fast-axis compression lens assembly would include five fast-axis compression mirrors corresponding to each of the five bars.

[0063] Referring to FIG. 1 , FIG. 2 and FIG. 3 , optionally, the dimming element is a negative lens 31 , and the concave surface of the negative lens 31 faces the prism 20 .

[0064] Alternatively, optionally, the dimming element may also be a positive lens 32 , and the convex surface of the positive lens 32 faces the prism 20 , as shown in FIG. 4 to FIG. 9 .

[0065] When the dimming element is a positive lens 32, the positive lens 32 may optionally be a cylindrical lens, as shown in Figures 5 and 6; or a spherical lens, as shown in Figures 7 and 8. This application does not impose any restrictions on this, and those skilled in the art may select the surface shape of the positive lens 32 according to actual needs.

[0066] Please refer to Figures 10 to 12. Optionally, the above-mentioned optical module may include a fixed group 100 and multiple replacement groups 200, and the multiple replacement groups 200 are used to replace the light-emitting side of the fixed group 100; at least two stacked array light sources 10 and prisms 20 are located in the fixed group 100; the dimming element and the light-guiding element 40 are located in the replacement group 200; wherein, the light-guiding elements 40 of any two replacement groups 200 are different, and / or, the dimming elements of any two replacement groups 200 have different deflection angles of the light beam.

[0067] In other words, the stacked light source 10 and prism 20 of the optical module can be configured as a fixed group 100, while the dimming element and light guide element 40 can be configured as a replaceable group 200. This allows users to select the appropriate replaceable group 200 based on the desired light spot size on the receiving surface and install it on the light-emitting side of the fixed group 100. This allows users to achieve light spot output of varying sizes simply by replacing the replaceable group 200, reducing the cost of the optical module and meeting the needs of multiple scenarios.

[0068] In this embodiment, different replacement groups 200 have different light guide elements 40 , different dimming elements (the dimming elements have different deflection angles for the light beam), or different light guide elements 40 and dimming elements.

[0069] For example, the present application may include at least three replacement groups 200, the first replacement group 200 including a negative lens 31 and a light-guiding element 40, as shown in FIG10; the second replacement group 200 including a positive lens 32 with a cylindrical surface and a light-guiding element 40, as shown in FIG11; the third replacement group 200 including a positive lens 32 with a spherical surface and a light-guiding element 40, as shown in FIG12.

[0070] Among them, the first replacement group 200 can also include multiple first replacement groups 200, and the negative lenses 31 of any two first replacement groups 200 have different curvatures or the size specifications of the light guide elements 40 are different; similarly, the second replacement group 200 can also include multiple second replacement groups 200, and the positive lenses 32 of any two second replacement groups 200 have different curvatures or the size specifications of the light guide elements 40 are different; similarly, the third replacement group 200 can also include multiple third replacement groups 200, and the positive lenses 32 of any two third replacement groups 200 have different curvatures or the size specifications of the light guide elements 40 are different.

[0071] Another aspect of the present invention provides an optical system, which includes the above-mentioned optical module. Since the specific structure and beneficial effects of the above-mentioned optical module have been described in detail above, they will not be repeated here.

[0072] The foregoing description is merely an optional embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

[0073] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. An optical module, characterized in that: It comprises at least two stacked array light sources, prisms arranged on the light-emitting sides of the two stacked array light sources, a dimming element arranged on the light-emitting side of the prisms, and a light-guiding element arranged on the light-emitting side of the dimming element; The light beams emitted by the at least two stacked light sources are combined by the prism and then incident on the dimming element. The dimming element diverges or converges the light beams and then incident on the light guiding element. The light guiding element totally reflects the light beams at least once to obtain a uniform light spot on the receiving surface. The geometric connection critical point where the light beams emitted by the at least two stacked light sources produce the first energy superposition is the first position, and the prism and the dimming element are respectively located on two opposite sides of the first position.

2. The optical module according to claim 1, characterized in that: The optical module further includes at least two fast axis compression mirror groups, and the at least two fast axis compression mirror groups correspond one to one to at least two stacked light sources, and are used to compress the light beam emitted by each stacked light source in the fast axis direction.

3. The optical module according to claim 2, characterized in that: The stacked array light source includes a plurality of bars stacked in sequence; the fast axis compression mirror group includes a plurality of fast axis compression mirrors, which are arranged one by one on the light emitting sides of the plurality of bars, and are used to compress the light beam emitted by each bar in the fast axis direction.

4. The optical module according to claim 1, characterized in that: The at least two stacked arrays of light sources are arranged linearly along a first direction, and the prism is used to combine the light beams emitted by the at least two stacked arrays of light sources in the first direction; Alternatively, the at least two stacked array light sources are arranged in an array along the first direction and the second direction; the prism comprises a first prism unit and a second prism unit, the first prism unit is used to combine the light beams emitted by the at least two stacked array light sources in the first direction, and the second prism unit is used to combine the light beams emitted by the at least two stacked array light sources in the first direction. Beam combining in two directions.

5. The optical module according to claim 1, characterized in that: The dimming element is a negative lens, and a concave surface of the negative lens faces the prism.

6. The optical module according to claim 1, characterized in that: The dimming element is a positive lens, and the convex surface of the positive lens faces the prism.

7. The optical module according to claim 6, characterized in that: The positive lens is a cylindrical lens or a spherical lens.

8. The optical module according to claim 1, characterized in that: The light-guiding element is an optical waveguide or a reflection cavity formed by a plurality of reflection surfaces.

9. The optical module according to any one of claims 1 to 7, characterized in that: The optical module includes a fixed group and a plurality of replacement groups, wherein the plurality of replacement groups are used to replace the light emitting side of the fixed group; The at least two stacked array light sources and the prism are located in the fixed group; the dimming element and the light-guiding element are located in the replaceable group; wherein, the light-guiding elements of any two replaceable groups are different, and / or, the deflection angles of the light beams by the dimming elements of any two replaceable groups are different.

10. An optical system, characterized in that: An optical module comprising any one of claims 1 to 9.

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