Shaping and combining system and electronic device

Abstract

The application discloses a shaping and combining system and electronic equipment. The shaping and combining system comprises: a light source assembly comprising a red laser light source, a green laser light source and a blue laser light source; at least two laser light sources in the light source assembly have different spot aspect ratios; a lens assembly comprising a collimating lens and a one-way curvature mirror; at least one collimating lens is arranged in an optical path of each laser light source in the light source assembly; at least one one-way curvature mirror is further arranged in an optical path of the red laser light source; and a beam combining assembly for combining a plurality of light beams emitted via the light source assembly; the optical parameters of the one-way curvature mirror are associated with at least one of the following: the spot aspect ratio of at least one laser light source in the light source assembly, and the spot aspect ratio of the light beams emitted via the beam combining assembly.

Description

Technical Field

[0001] This application relates to the field of optical components, and more specifically, to a beam-shaping and beam-combining system and electronic device. Background Technology

[0002] In recent years, LBS (Laser Beam Scanning) projectors have developed rapidly as an emerging micro-projection technology, demonstrating broad application prospects. Technically, LBS projectors utilize laser beam scanning and MEMS (Micro-Electro-Mechanical Systems) micromirrors to achieve ultra-miniaturization, high contrast, and fast response, making them a research hotspot in consumer electronics, automotive displays, and smart wearables. In the market, although LBS projectors are still in their early stages, several companies have already launched concept products or small-scale commercial applications, especially showing promise in scenarios such as smart glasses and automotive head-up displays.

[0003] LBS projection lamps typically use red, green, and blue laser light sources, each emitting lasers with different divergence angles and spot sizes. How to shape and combine the beams of these three laser sources is a pressing problem that needs to be solved. Utility Model Content

[0004] To address at least one of the aforementioned problems, this application provides a shaping and beam-combining system and electronic device that can achieve 1080P color dynamic projection in the application scenario of vehicle welcome lights. It can project brand logos, vehicle outlines, dynamic visual effects, or safety warnings, and can also achieve high luminous flux output and high brightness.

[0005] The first aspect of this application provides a beam shaping and combining system, comprising: a light source assembly including a red laser source, a green laser source, and a blue laser source; at least two laser sources in the light source assembly having different beam aspect ratios; a lens assembly including a collimating lens and a one-way curvature mirror; at least one collimating lens is provided in the optical path of each laser source in the light source assembly; at least one one-way curvature mirror is also provided in the optical path of the red laser source; and a beam combining assembly for combining multiple beams emitted through the light source assembly; the optical parameters of the one-way curvature mirror are associated with at least one of the following: the beam aspect ratio of at least one laser source in the light source assembly, and the beam aspect ratio of the beam emitted through the beam combining assembly.

[0006] In some embodiments of this application, the beam combining assembly includes a first beam combining device and a second beam combining device; the first beam combining device is used to combine beams emitted from a green laser source and a blue laser source; the second beam combining device is used to combine beams emitted from the first beam combining device and beams emitted from a red laser source; at least one unidirectional curvature mirror is provided in the optical path between the first beam combining device and the second beam combining device.

[0007] In some embodiments of this application, the red laser source, the green laser source, and the blue laser source are all multimode laser sources.

[0008] In some embodiments of this application, the red laser source includes a first single-mode laser source and a second single-mode laser source; the optical path containing the first single-mode laser source and the optical path containing the second single-mode laser source are respectively provided with at least one unidirectional curvature mirror before beam combining.

[0009] In some embodiments of this application, the red laser source includes a first single-mode laser source and a second single-mode laser source; the optical path containing the first single-mode laser source and the optical path containing the second single-mode laser source are provided with at least one unidirectional curvature mirror after beam combining.

[0010] In some embodiments of this application, the beam shaping system satisfies the following relationship: 4 ≤ max_aspect ratio / min_aspect ratio ≤ 12; where max_aspect ratio is the maximum value of the beam aspect ratio among the red, green, and blue laser light sources, and min_aspect ratio is the minimum value of the beam aspect ratio among the red, green, and blue laser light sources.

[0011] In some embodiments of this application, the lens assembly satisfies the following relationship: 0.93≤BFL / TTL<1, and / or, 1.6mm≤(d1×BFL) / (d1+BFL)≤6.3mm; where BFL is the optical back focal length corresponding to each optical path in the lens assembly, TTL is the total optical length corresponding to each optical path in the lens assembly, and d1 is the thickness of the unidirectional curvature mirror near the image plane in each optical path of the lens assembly.

[0012] In some embodiments of this application, the lens assembly satisfies the relationship: 1.2≤fx / fy≤4; where fx is the focal length of each optical path in the lens assembly in the x-direction, and fy is the focal length of each optical path in the lens assembly in the y-direction.

[0013] In some embodiments of this application, the lens assembly satisfies the relationship: 0.3≤fx / fy≤0.6; where fx is the focal length of each optical path in the lens assembly in the x-direction, and fy is the focal length of each optical path in the lens assembly in the y-direction.

[0014] In some embodiments of this application, the lens assembly satisfies the relationship: -1.4≤R_E / fx≤-0.2; where R_E is the radius of curvature of the light-emitting side of the last unidirectional curvature mirror in each optical path of the lens assembly, and fx is the focal length of each optical path in the lens assembly in the x-direction.

[0015] In some embodiments of this application, the lens assembly satisfies the relationship: R_E / fx≥4; where R_E is the radius of curvature of the light-emitting side of the last unidirectional curvature mirror in each optical path of the lens assembly, and fx is the focal length of each optical path in the lens assembly in the x-direction.

[0016] In some embodiments of this application, the lens assembly satisfies the following relationships: 1≤max(fx / fy) / min(fx / fy)≤7, and / or, 1≤max(|R_E / fx|) / min(|R_E / fx|)≤2.6; where fx is the focal length of each optical path in the lens assembly in the x-direction, fy is the focal length of each optical path in the lens assembly in the y-direction, and R_E is the radius of curvature of the light-emitting side of the last unidirectional curvature mirror in each optical path of the lens assembly.

[0017] In some embodiments of this application, the lens assembly satisfies the relationship: 1≤max(fx) / min(fx)≤6.5; where fx is the focal length of each optical path in the lens assembly in the x direction, and fy is the focal length of each optical path in the lens assembly in the y direction.

[0018] In some embodiments of this application, each optical path of the shaping and beam combining system is provided with two unidirectional curvature mirrors, and the lens assembly satisfies the relationship: 0.23≤|fx1,1| / |fx2,1|≤2.7; where fx1,1 is the focal length in the x-direction of the unidirectional curvature mirror closer to the collimating lens in each optical path of the lens assembly, and fx2,1 is the focal length in the x-direction of the unidirectional curvature mirror farther from the collimating lens in each optical path of the lens assembly.

[0019] In some embodiments of this application, each optical path of the shaping and beam combining system is provided with two unidirectional curvature mirrors, and the lens assembly satisfies the relationship: (|R1,l|+|R2,l|+|R3,l|+|R4,l|) / (d2+d3)≥5; where R1,l is the radius of curvature of the incident light side of the unidirectional curvature mirror near the collimating lens in each optical path of the lens assembly, R2,l is the radius of curvature of the exit light side of the unidirectional curvature mirror near the collimating lens in each optical path of the lens assembly, R3,l is the radius of curvature of the incident light side of the unidirectional curvature mirror away from the collimating lens in each optical path of the lens assembly, R4,l is the radius of curvature of the exit light side of the unidirectional curvature mirror away from the collimating lens in each optical path of the lens assembly, d2 is the air gap between the collimating lens and the unidirectional curvature mirror in each optical path of the lens assembly, and d3 is the air gap between the two unidirectional curvature mirrors in each optical path of the lens assembly.

[0020] In some embodiments of this application, each optical path of the shaping and beam combining system is provided with two unidirectional curvature mirrors, and the lens assembly satisfies the relationship: 0.3mm≤d3×|SAG1,l / SAG2,l|≤12mm; where d3 is the air gap between the two unidirectional curvature mirrors in each optical path of the lens assembly, SAG1,l is the sag of the incident light side of the unidirectional curvature mirror near the collimating lens in each optical path of the lens assembly, and SAG2,l is the sag of the exit light side of the unidirectional curvature mirror away from the collimating lens in each optical path of the lens assembly.

[0021] In some embodiments of this application, the lens assembly consists of a first collimating lens corresponding to a blue laser source, a second collimating lens corresponding to a green laser source, a third collimating lens corresponding to a red laser source, and a one-way curvature mirror; the one-way curvature mirror is located on the light-emitting side of the third collimating lens; the first collimating lens, the second collimating lens, and the third collimating lens are all biconvex lenses with positive optical power; the one-way curvature mirror has positive optical power; the light-incident side of the one-way curvature mirror is concave, and the light-emitting side of the one-way curvature mirror is convex.

[0022] In some embodiments of this application, the lens assembly comprises a first collimating lens corresponding to a blue laser source, a second collimating lens corresponding to a green laser source, a third collimating lens corresponding to a red laser source, a first one-way curvature mirror, a second one-way curvature mirror, and a third one-way curvature mirror; the first and second one-way curvature mirrors are sequentially arranged on the light-emitting side of the third collimating lens; the third one-way curvature mirror is arranged in the optical path after the outgoing light from the green laser source and the outgoing light from the blue laser source are combined; the first collimating lens... The second and third collimating lenses are both biconvex lenses with positive optical power; the first one-way curvature mirror has negative optical power; the incident side of the first one-way curvature mirror is concave or flat, and the exit side of the first one-way curvature mirror is concave or flat; the second one-way curvature mirror has positive optical power; the incident side of the second one-way curvature mirror is concave or flat, and the exit side of the first one-way curvature mirror is convex; the third one-way curvature mirror has positive optical power; the incident side of the third one-way curvature mirror is concave, and the exit side of the third one-way curvature mirror is convex.

[0023] In some embodiments of this application, the lens assembly comprises a first collimating lens, a second collimating lens, a third collimating lens, a first one-way curvature mirror, a second one-way curvature mirror, a third one-way curvature mirror, a fourth one-way curvature mirror, a fifth one-way curvature mirror, and a sixth one-way curvature mirror; the third collimating lens, the first one-way curvature mirror, and the second one-way curvature mirror are arranged sequentially in the light emission direction of the red laser source; the second collimating lens, the third one-way curvature mirror, and the fourth one-way curvature mirror are arranged sequentially in the light emission direction of the green laser source; the first collimating lens, the fifth one-way curvature mirror, and the sixth one-way curvature mirror are arranged sequentially in the light emission direction of the blue laser source; the first collimating lens, the second collimating lens, and the third collimating lens... All are biconvex lenses with positive optical power; the first one-way curvature lens has negative optical power; the incident side of the first one-way curvature lens is concave, and the exit side of the first one-way curvature lens is concave; the second one-way curvature lens has positive optical power; the incident side of the second one-way curvature lens is concave, and the exit side of the first one-way curvature lens is convex; the third and fifth one-way curvature lenses both have negative optical power; the incident sides of the third and fifth one-way curvature lenses are both concave, and the exit sides are both planar or concave; the fourth and sixth one-way curvature lenses both have positive optical power; the incident sides of the fourth and sixth one-way curvature lenses are both concave or planar, and the exit sides are both convex.

[0024] In some embodiments of this application, the lens assembly comprises a first collimating lens corresponding to the blue laser source, a second collimating lens corresponding to the green laser source, a fourth collimating lens corresponding to the first single-mode laser source, a third collimating lens corresponding to the second single-mode laser source, a first unidirectional curvature mirror, a second unidirectional curvature mirror, and a third unidirectional curvature mirror; the first and second unidirectional curvature mirrors are sequentially arranged in the optical path after the beams of the emitted light from the first and second single-mode laser sources are combined; the third unidirectional curvature mirror is arranged between the emitted light from the green laser source and the blue laser source. The light path of the outgoing rays after beam combining; the first collimating lens, the second collimating lens, the third collimating lens, and the fourth collimating lens are all biconvex lenses with positive optical power; the first one-way curvature mirror has positive optical power; the incident side of the first one-way curvature mirror is convex, and the exit side of the first one-way curvature mirror is either flat or convex; the second one-way curvature mirror has negative optical power; the incident side of the second one-way curvature mirror is concave, and the exit side of the first one-way curvature mirror is either concave or flat; the third one-way curvature mirror has positive optical power; the incident side of the third one-way curvature mirror is concave, and the exit side of the third one-way curvature mirror is convex.

[0025] In some embodiments of this application, the lens assembly comprises a first collimating lens, a second collimating lens, a third collimating lens, a fourth collimating lens, a first one-way curvature mirror, a second one-way curvature mirror, a third one-way curvature mirror, a fourth one-way curvature mirror, a fifth one-way curvature mirror, a sixth one-way curvature mirror, a seventh one-way curvature mirror, and an eighth one-way curvature mirror; the fourth collimating lens, the first one-way curvature mirror, and the second one-way curvature mirror are arranged sequentially in the light-emitting direction of the first single-mode laser source; the third collimating lens, the third one-way curvature mirror, and the fourth one-way curvature mirror are arranged sequentially in the light-emitting direction of the second single-mode laser source; the second collimating lens, the fifth one-way curvature mirror, and the sixth one-way curvature mirror are arranged sequentially in the light-emitting direction of the green laser source; the first collimating lens, the seventh one-way curvature mirror, and the eighth one-way curvature mirror are arranged sequentially in the light-emitting direction of the blue laser source; the first collimating lens... The first, second, third, and fourth collimating lenses are all biconvex lenses with positive optical power; the first and third one-way curvature mirrors both have positive optical power; the incident light sides of the first and third one-way curvature mirrors are both convex, and the exit light sides are both concave; the second and fourth one-way curvature mirrors both have negative optical power; the incident light sides of the second and fourth one-way curvature mirrors are both planar or concave, and the exit light sides are both concave; the fifth and seventh one-way curvature mirrors both have negative optical power; the incident light sides of the fifth and seventh one-way curvature mirrors are both concave, and the exit light sides are both planar or concave; the sixth and eighth one-way curvature mirrors both have positive optical power; the incident light sides of the sixth and eighth one-way curvature mirrors are both concave or planar, and the exit light sides are convex.

[0026] In some embodiments of this application, the shaping and binding system satisfies at least one of the following relationships: 6 ≤ max_aspect ratio / min_aspect ratio ≤ 11, 0.975 ≤ BFL / TTL < 1, 1.443 ≤ fx / fy ≤ 1.458, -0.948 ≤ R_E / fx ≤ -0.917, 1.443 ≤ max(fx / fy) / min(fx / fy) ≤ 1.458; 0.967 ≤ BFL / TTL < 1, 3.491 mm ≤ (d1 × BFL) / (d1 + BFL) ≤ 5.705 mm, 2.283 ≤ fx / fy ≤ 2.861, -0.904 ≤ R_E / fx ≤ -0.360, 1.239 ≤ ma x(fx / fy) / min(fx / fy)≤1.253, 1.068≤max(|R_E / fx|) / min(|R_E / fx|)≤2.277, 1.258≤max(fx) / min(fx)≤1.273, 0.238≤|fx1,1| / |fx2,1|≤0.36 ;0.976≤BFL / TTL<1, 3.325mm≤(d1×BFL) / (d1+BFL)≤4.585mm, 2.731≤fx / fy≤3.228, -0.850≤R_E / fx≤-0.462, 1.080≤max(fx / fy) / min(fx / fy)≤1. 178. (|R1,l|+|R2,l|+|R3,l|+|R4,l|) / (d2+d3)≥6.669 and 0.386mm≤d3×|SAG1,l / SAG2,l|≤8.812mm, 0.348≤|fx1,1| / |fx2,1|≤0.442; 0.956≤BFL / TTL<1, 3.491mm≤(d1×BFL) / (d1+BFL)≤5.749mm, 2.002≤fx / fy≤2.854 or 0.374≤fx / fy≤0.463, -0.809≤R_E / fx≤-0.554 or 6.212≤R_E / fx, 5.611≤max (fx / fy) / min(fx / fy)≤6.234, 0.160≤R(fx / fy) / GB(fx / fy)≤0.206, 2.172≤|fx1,1| / |fx2,1|≤2.647; 0.985≤BFL / TTL<1, 1.973mm≤(d1×BFL) / (d1 +BFL)≤3.071mm, 2.314≤fx / fy≤2.890 or 0.449≤fx / fy≤0.542, -1.131≤R_E / fx≤-0.809 or 4.433≤R_E / fx≤7.777, 5.191≤max(fx / fy) / min(fx / fy)≤5.328. (|R1,l|+|R2,l|+|R3,l|+|R4,l|) / (d2+d3)≥16.508, 4.247mm≤d3×|SAG1,l / SAG2 ,l|≤9.427mm, 0.188≤R(fx / fy) / GB(fx / fy)≤0.195, 0.564≤|fx1,1| / |fx2,1|≤2.258;.

[0027] Where max_aspect ratio is the maximum aspect ratio of the laser spot in the red, green, and blue laser sources, min_aspect ratio is the minimum aspect ratio of the laser spot in the red, green, and blue laser sources, BFL is the optical back focal length corresponding to each optical path in the lens assembly, TTL is the total optical length corresponding to each optical path in the lens assembly, d1 is the thickness of the one-way curvature mirror near the image plane in each optical path of the lens assembly, and fx is the x-axis length of each optical path in the lens assembly. Let fy be the focal length of each optical path in the lens assembly in the y-direction, R_E be the radius of curvature of the exiting side of the last one-way curvature mirror in each optical path of the lens assembly, R1,l be the radius of curvature of the incident side of the one-way curvature mirror near the collimating lens in each optical path of the lens assembly, R2,l be the radius of curvature of the exiting side of the one-way curvature mirror near the collimating lens in each optical path of the lens assembly, and R3,l be the radius of curvature of the incident side of the one-way curvature mirror away from the collimating lens in each optical path of the lens assembly. Radius, R4,l is the radius of curvature of the exit side of the one-way curvature mirror away from the collimating lens in each optical path of the lens assembly; d2 is the air gap between the collimating lens and the one-way curvature mirror in each optical path of the lens assembly; d3 is the air gap between the two one-way curvature mirrors in each optical path of the lens assembly; SAG1,l is the sag of the incident side of the one-way curvature mirror near the collimating lens in each optical path of the lens assembly; SAG2,l is the exit side of the one-way curvature mirror away from the collimating lens in each optical path of the lens assembly. The side sag, R(fx / fy), is the ratio of the focal lengths of the optical path containing the red laser source in the lens assembly in the x and y directions. GB(fx / fy) is the ratio of the focal lengths of the optical path containing the green laser source or the blue laser source in the lens assembly in the x and y directions. fx1,l is the focal length of the unidirectional curvature mirror closest to the collimating lens in each optical path of the lens assembly in the x direction. fx2,l is the focal length of the unidirectional curvature mirror furthest from the collimating lens in each optical path of the lens assembly in the x direction.

[0028] The second aspect of this application provides an electronic device that includes the aforementioned shaping and bundling system.

[0029] In summary, the orthopedic ligation system of this application has the following advantages or effects:

[0030] 1) The beam shaping and combining system of this application can shape the light source for multi-mode light source or light source scheme that combines single-mode and multi-mode light source respectively, so that the red, green and blue light beams emitted by the laser can be shaped to achieve uniform light, reduce the color deviation problem caused by uneven light mixing, and improve the quality of the system projection image.

[0031] 2) The beam shaping and combining system of this application can control the output spot size of the red, green and blue laser light sources, ensuring that the ratio of the spot size in the slow axis to the fast axis direction is within the range of 5:1 to 3:1 at the image plane position of 1m to 5m, thus ensuring high-definition projection (such as up to 1080P).

[0032] 3) In the shaping and beam combining system of this application, the physical emission size difference between the green laser source and the red laser source is small, with the size difference ranging from 0.2μm to 1.0μm. They can share a single unidirectional curvature mirror, which is beneficial for miniaturization and low-cost design.

[0033] 4) The beam shaping and combining system of this application can adopt a multimode laser scheme or a scheme combining single-mode laser and multimode laser, which can achieve high light flux output (such as greater than 100lm) while ensuring the projection effect. Attached Figure Description

[0034] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0035] Figure 1 A schematic diagram of the shaping and bundling system according to embodiment E1-1 of this application is shown;

[0036] Figure 2 A schematic diagram of the shaping and bundling system according to embodiment E2-1 of this application is shown;

[0037] Figure 3 A schematic diagram of the shaping and bundling system according to embodiment E3-1 of this application is shown;

[0038] Figure 4 A schematic diagram of the shaping and bundling system according to embodiment E4-1 of this application is shown;

[0039] Figure 5 A schematic diagram of the shaping and bundling system according to embodiment E5-1 of this application is shown. Detailed Implementation

[0040] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements.

[0041] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0042] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn strictly to scale.

[0043] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the light-incident side is called the light-incident side of the lens, and the surface of each lens closest to the light-outcident side is called the light-outcident side of the lens.

[0044] It should also be understood that the terms "comprising," "including," and / or "having," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0045] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having the meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formal sense, unless expressly so specified herein.

[0046] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0047] The features, principles and other aspects of this application are described in detail below.

[0048] The beam-shaping and combining system according to an exemplary embodiment of this application may include a light source assembly, a lens assembly, and a beam-combining assembly. The light source assembly includes a red laser source, a green laser source, and a blue laser source; at least two laser sources in the light source assembly have different aspect ratios. The lens assembly includes a collimating lens and a one-way curvature mirror; each laser source in the light source assembly has at least one collimating lens in its optical path; the optical path of the red laser source also has at least one one-way curvature mirror. The beam-combining assembly is used to combine multiple beams emitted from the light source assembly.

[0049] Specifically, the optical parameters of the one-way curvature mirror are associated with at least one of the following: the aspect ratio of the spot of at least one laser source in the light source assembly, and the aspect ratio of the spot of the beam emitted by the beam combining assembly, so as to achieve beam combining and shaping of the beam emitted by the three-color laser source.

[0050] It should be noted that the unidirectional curvature lens mentioned in this application refers to a lens that has curvature in a certain direction (usually corresponding to the fast axis direction of the laser source), such as a cylindrical lens.

[0051] It is understood that the lens assembly provided in this application can serve as a light-emitting lens, typically used to transmit light from the light-emitting unit to the object-side space. According to the function of the light, the light transmitted to the object-side space can be divided into projection light, which is used to form a projected image, etc. Furthermore, in this document, "incident light side" can refer to the light source side, and "exit light side" can refer to the image side / object side.

[0052] In an exemplary embodiment, the beam combining assembly includes a first beam combining device and a second beam combining device; the first beam combining device is used to combine beams emitted from a green laser source and a blue laser source; the second beam combining device is used to combine beams emitted from the first beam combining device and beams emitted from a red laser source. At least one unidirectional curvature mirror is provided in the optical path between the first and second beam combining devices, which is beneficial for miniaturization and low-cost design.

[0053] In an exemplary embodiment, two unidirectional curvature mirrors are provided in the optical path where the red laser source is located.

[0054] In an exemplary embodiment, the red laser source, the green laser source, and the blue laser source are all multimode laser sources.

[0055] In an exemplary embodiment, the red laser source includes a first single-mode laser source and a second single-mode laser source; the optical paths of the first single-mode laser source and the second single-mode laser source are respectively provided with at least one unidirectional curvature mirror before beam combining.

[0056] In an exemplary embodiment, the red laser source includes a first single-mode laser source and a second single-mode laser source; the optical path containing the first single-mode laser source and the optical path containing the second single-mode laser source are provided with at least one unidirectional curvature mirror after beam combining.

[0057] In some embodiments, such as embodiments E1-1 to E1-3 below, the lens assembly may consist of a first collimating lens corresponding to the blue laser light source, a second collimating lens corresponding to the green laser light source, a third collimating lens corresponding to the red laser light source, and a one-way curvature mirror; the one-way curvature mirror is located on the light-emitting side of the third collimating lens.

[0058] In some examples, each collimating lens can be implemented as a biconvex lens with positive optical power. Each collimating lens is a positive lens, capable of converting diverging beams into approximately parallel light through the principle of refraction, thereby compressing the divergence angle of the fast and slow axes of the semiconductor laser source and improving beam transmission efficiency. The incident light-side of each collimating lens is convex, which improves aesthetics, facilitates cleaning, and reduces dust accumulation. The convexity of the incident light-side of each collimating lens further converges and collects light, facilitating the adjustment of the peripheral field of view by the subsequent optical system.

[0059] In some examples, a one-way curvature mirror can have positive optical power; the incident side of the one-way curvature mirror can be concave, and the exit side can be convex. A one-way curvature mirror with positive optical power can compress the spot size of the red light beam emitted by a red laser source along the slow axis. Setting the incident side of the one-way curvature mirror to be concave allows it to work with a collimating lens to diverge light rays from the edge of the field of view. Setting the exit side of the one-way curvature mirror to be convex facilitates light focusing and collection, reduces the lens aperture, and increases the luminous flux at the image plane.

[0060] In some embodiments, such as embodiments E2-1 to E2-4 below, the lens assembly may consist of a first collimating lens corresponding to the blue laser source, a second collimating lens corresponding to the green laser source, a third collimating lens corresponding to the red laser source, a first one-way curvature mirror, a second one-way curvature mirror, and a third one-way curvature mirror; the first one-way curvature mirror and the second one-way curvature mirror are arranged sequentially on the light-emitting side of the third collimating lens; the third one-way curvature mirror is arranged in the optical path after the outgoing light from the green laser source and the outgoing light from the blue laser source are combined.

[0061] In some examples, each collimating lens can be implemented as a biconvex lens with positive optical power.

[0062] In some examples, the first one-way curvature mirror can have a negative optical power; the incident side of the first one-way curvature mirror can be concave or flat, and the exiting side of the first one-way curvature mirror can also be concave or flat. The negative optical power of the first one-way curvature mirror allows adjustment of the light deflection angle, ensuring that when the light reaches the second one-way curvature mirror, there is a margin for compressing the spot size in the slow axis direction, thus reducing the system length. The incident side of the first one-way curvature mirror is sequentially configured as concave, flat, and concave, and the exiting side is sequentially configured as concave, concave, and flat, which has a diverging effect on the light.

[0063] In some examples, the second one-way curvature mirror can have positive optical power; the incident side of the second one-way curvature mirror can be concave or flat, and the exit side can be convex. The positive optical power of the second one-way curvature mirror compresses the spot size of the red light beam emitted by the red laser source along the slow axis. Setting the incident side of the second one-way curvature mirror as concave or flat allows for beam expansion of peripheral field-of-view rays. Setting the exit side of the second one-way curvature mirror as convex facilitates the collection and convergence of peripheral field-of-view rays, reducing the number of one-way curvature mirrors (such as cylindrical mirrors) and increasing the luminous flux at the image plane.

[0064] In some examples, the third one-way curvature mirror can have positive optical power; the incident side of the third one-way curvature mirror can be concave, and the exit side can be convex. The positive optical power of the third one-way curvature mirror compresses the spot size of the green and blue light beams emitted from the green and blue laser sources along the slow axis, ensuring that the spot size of the green and blue beams in the slow axis when they reach the image plane is consistent with the spot size of the red light beam. The concave incident side of the third one-way curvature mirror expands the beams at the edge of the field of view. The convex exit side of the third one-way curvature mirror collects and converges the light rays at the edge of the field of view, adjusting the divergence angle of the light rays at the edge, which helps to smooth the light path and reduce the sensitivity of the subsequent optical system.

[0065] In some embodiments, such as embodiments E3-1 to E3-3 below, the lens assembly may consist of a first collimating lens, a second collimating lens, a third collimating lens, a first one-way curvature mirror, a second one-way curvature mirror, a third one-way curvature mirror, a fourth one-way curvature mirror, a fifth one-way curvature mirror, and a sixth one-way curvature mirror; the third collimating lens, the first one-way curvature mirror, and the second one-way curvature mirror are arranged sequentially in the light-emitting direction of the red laser source; the second collimating lens, the third one-way curvature mirror, and the fourth one-way curvature mirror are arranged sequentially in the light-emitting direction of the green laser source; and the first collimating lens, the fifth one-way curvature mirror, and the sixth one-way curvature mirror are arranged sequentially in the light-emitting direction of the blue laser source.

[0066] In some examples, each collimating lens can be a biconvex lens with positive optical power.

[0067] In some examples, the first one-way curvature mirror can have a negative optical power; the incident side of the first one-way curvature mirror can be concave, and the exiting side of the first one-way curvature mirror can also be concave. The negative optical power of the first one-way curvature mirror allows adjustment of the light deflection angle, ensuring that when the light reaches the second one-way curvature mirror, there is a margin for compressing the spot size in the slow-axis direction, thus reducing the system length. The concave incident and exiting sides of the first one-way curvature mirror provide good light divergence.

[0068] In some examples, the second one-way curvature mirror can have positive optical power; the incident side of the second one-way curvature mirror can be concave, and the exit side can be convex. The positive optical power of the second one-way curvature mirror compresses the spot size of the red light beam emitted by the red laser source along the slow axis. The concave incident side of the second one-way curvature mirror allows for the initial divergence of light rays from the edge of the field of view. The convex exit side of the second one-way curvature mirror facilitates light focusing and collection, reduces the lens aperture, and increases the luminous flux at the image plane.

[0069] In some examples, both the third and fifth one-way curvature mirrors can have negative optical power; the incident side of both the third and fifth one-way curvature mirrors can be concave, and the exiting side can be either flat or concave. The negative optical power of both the third and fifth one-way curvature mirrors allows for adjustment of the light deflection angle, providing a margin for compressing the spot size in the slow-axis direction when the light reaches the fourth or sixth one-way curvature mirror, thus reducing the system length. The concave incident side and flat or concave exiting side of both the third and fifth one-way curvature mirrors provide good light divergence.

[0070] In some examples, both the fourth and sixth one-way curvature mirrors can have positive optical power. The incident surfaces of both mirrors can be concave or flat, while the exiting surfaces can be convex. The positive optical power of both mirrors allows for the compression of the light spots of the green and blue laser beams emitted from the green and blue laser sources along the slow axis, ensuring that the spot size of the green and blue beams in the slow axis direction when they reach the image plane is consistent with the spot size of the red beam. The concave or flat incident surfaces and convex exiting surfaces of both mirrors enable the collection and convergence of light rays from the edge of the field of view, adjusting the divergence angle of light rays at the edge, thus smoothing the light path and reducing the sensitivity of the subsequent optical system.

[0071] In some embodiments, such as embodiments E4-1 to E4-3 below, the lens assembly may consist of a first collimating lens corresponding to the blue laser source, a second collimating lens corresponding to the green laser source, a third collimating lens corresponding to the first single-mode laser source, a fourth collimating lens corresponding to the second single-mode laser source, a first unidirectional curvature mirror, a second unidirectional curvature mirror, and a third unidirectional curvature mirror; the first unidirectional curvature mirror and the second unidirectional curvature mirror are sequentially arranged in the optical path after the beams of the emitted light from the first single-mode laser source and the emitted light from the second single-mode laser source are combined; the third unidirectional curvature mirror is arranged in the optical path after the beams of the emitted light from the green laser source and the emitted light from the blue laser source are combined.

[0072] In some examples, each collimating lens can be a biconvex lens with positive optical power.

[0073] In some examples, the first one-way curvature mirror can have positive optical power; the incident side of the first one-way curvature mirror can be convex, and the exit side can be either flat or convex. Having positive optical power allows the first one-way curvature mirror to compress the spot size of the red light beam emitted from the red laser source along the slow axis. Setting the incident side of the first one-way curvature mirror as convex allows it to work with a collimating lens to collect and converge light rays from the edge of the field of view. Setting the exit side of the first one-way curvature mirror as flat or convex with an absolute curvature value smaller than that of the incident side helps to smooth the light path, reduce lens thickness, simplify structural design, and reduce the sensitivity of the subsequent optical system.

[0074] In some examples, the second one-way curvature mirror can have a negative optical power; the incident side of the second one-way curvature mirror can be concave, and the emitting side can be either concave or planar. The negative optical power of the second one-way curvature mirror enables it to expand the beam of red light emitted from a red laser source along the slow axis. The concave nature of the incident side of the second one-way curvature mirror allows it to work in conjunction with the first one-way curvature mirror to expand the light beam. The concave or planar nature of the emitting side of the second one-way curvature mirror helps to smooth the light path, reduces structural design complexity, and minimizes chromatic aberration.

[0075] In some examples, the third one-way curvature mirror can have positive optical power; the incident side of the third one-way curvature mirror can be concave, and the exit side can be convex. The positive optical power of the third one-way curvature mirror allows for the compression of the light beams emitted by green and blue laser sources along the slow axis. The concave incident side of the third one-way curvature mirror, when used with a collimating lens, allows for pre-expansion of the peripheral field of view. The convex exit side of the third one-way curvature mirror facilitates light focusing and collection, reduces the lens aperture, and increases the luminous flux at the image plane.

[0076] In some embodiments, such as embodiments E5-1 to E5-4 below, the lens assembly may consist of a first collimating lens, a second collimating lens, a third collimating lens, a fourth collimating lens, a first one-way curvature mirror, a second one-way curvature mirror, a third one-way curvature mirror, a fourth one-way curvature mirror, a fifth one-way curvature mirror, a sixth one-way curvature mirror, a seventh one-way curvature mirror, and an eighth one-way curvature mirror; the fourth collimating lens, the first one-way curvature mirror, and the second one-way curvature mirror are arranged sequentially in the light-emitting direction of the first single-mode laser source; the third collimating lens, the third one-way curvature mirror, and the fourth one-way curvature mirror are arranged sequentially in the light-emitting direction of the second single-mode laser source; the second collimating lens, the fifth one-way curvature mirror, and the sixth one-way curvature mirror are arranged sequentially in the light-emitting direction of the green laser source; and the first collimating lens, the seventh one-way curvature mirror, and the eighth one-way curvature mirror are arranged sequentially in the light-emitting direction of the blue laser source.

[0077] In some examples, each collimating lens can be a biconvex lens with positive optical power.

[0078] In some examples, both the first and third one-way curvature mirrors can have positive optical power; the incident side of both the first and third one-way curvature mirrors can be convex, and the exit side can be concave. The positive optical power of both the first and third one-way curvature mirrors allows for the compression of the red light beams emitted by the first and second single-mode laser sources along the slow axis. The convexity of the incident side of both mirrors allows for the collection and convergence of peripheral field-of-view rays in conjunction with the first and second collimating lenses, respectively. The concave exit side of both mirrors helps to smooth the light path, reduce lens thickness, simplify structural design, and decrease the sensitivity of the rear optical system.

[0079] In some examples, both the second and fourth one-way curvature mirrors can have negative optical power; the incident side of both the second and fourth one-way curvature mirrors can be either flat or concave, and the exiting side can be concave. The negative optical power of both the second and fourth one-way curvature mirrors allows them to expand the beam of red light emitted from the first and second single-mode laser sources along the slow axis. The fact that the incident side of both the second and fourth one-way curvature mirrors is either flat or concave allows them to work in conjunction with the first and second one-way curvature mirrors to expand the light beam. The concave exiting side of both the second and fourth one-way curvature mirrors helps to smooth the light path, reduce structural design complexity, and minimize chromatic aberration. It should be understood that the difference between the flat-concave or concave-concave structures of the second or fourth one-way curvature mirrors mentioned in this application lies in the fact that the double concave surface can reduce the radius of curvature of the concave exiting side, resulting in a smoother light transition.

[0080] In some examples, both the fifth and seventh one-way curvature mirrors can have negative optical power; the incident side of both mirrors can be concave, and the exiting side can be either flat or concave. Both mirrors, having negative optical power, can expand the beams of green and blue light emitted from green and blue laser sources along the slow axis, respectively. The concave incident side and flat or concave exiting side of both mirrors provide good light divergence.

[0081] In some examples, both the sixth and eighth one-way curvature mirrors can have positive optical power. The incident surfaces of both mirrors can be concave or flat, while the exiting surfaces can be convex. The positive optical power of both mirrors allows them to compress the light spots of the green and blue laser beams emitted from the green and blue laser sources along the slow axis, ensuring that the spot size of the green and blue beams in the slow axis direction when they reach the image plane is consistent with the spot size of the red beam. The concave or flat incident surfaces and convex exiting surfaces of both mirrors enable the collection and convergence of light rays from the edge fields of view, adjusting the divergence angle of light rays at the edges, thus smoothing the light path and reducing the sensitivity of the subsequent optical system.

[0082] It is worth noting that the lens assembly may employ at least one aspherical lens. It should be understood that aspherical lenses can also be plasticized to achieve cost reduction without compromising temperature performance.

[0083] Furthermore, the beam combining component mentioned in this application can be composed of multiple mirrors and multiple beam combining devices (such as color filters, dichroic mirrors, semi-reflective lenses, or polarizing color filters, etc.). It is only necessary to combine the multiple beams emitted by the red laser source, green laser source, and blue laser source into a single beam. This application will not elaborate further on this.

[0084] In an exemplary embodiment, the maximum and minimum aspect ratios (max_aspect ratio and min_aspect ratio) of the laser spots in the red, green, and blue laser sources can satisfy the following condition: 4 ≤ max_aspect ratio / min_aspect ratio ≤ 12. Preferably, 6 ≤ max_aspect ratio / min_aspect ratio ≤ 11. By controlling this relationship, the type of laser source can be effectively limited.

[0085] For example, for multimode laser sources: the aspect ratio of the red laser source can be between 9:1 and 11:1; the aspect ratio of the green and blue laser sources can be between 5:1 and 8:1. For single-mode laser sources: the aspect ratio of the first and second single-mode laser sources can be between 1:1 and 2:1.

[0086] In an exemplary embodiment, the optical back focal length (BFL) and total optical length (TTL) corresponding to each optical path in the lens assembly can satisfy: 0.93 ≤ BFL / TTL < 1. Preferably, in embodiments E1-1 to E1-3 below, 0.975 ≤ BFL / TTL < 1; in embodiments E2-1 to E2-4 below, 0.967 ≤ BFL / TTL < 1; in embodiments E3-1 to E3-3 below, 0.976 ≤ BFL / TTL < 1; in embodiments E4-1 to E4-3 below, 0.956 ≤ BFL / TTL < 1; and in embodiments E5-1 to E5-4 below, 0.985 ≤ BFL / TTL < 1. By controlling this relationship, a longer back focal length can be ensured while achieving miniaturization, which is beneficial for module assembly. It is understood that the optical back focal length (BFL) mentioned in this application refers to the distance from the light-emitting side of the last lens (such as a collimating lens or a one-way curvature lens) closest to the image plane in each optical path to the image focal point; the total optical length (TTL) mentioned in this application refers to the total optical length of the lens system corresponding to each optical path.

[0087] In an exemplary embodiment, the thickness d1 of the unidirectional curvature mirror near the image plane in each optical path of the lens assembly and the corresponding optical back focal length BFL can satisfy: 1.6mm ≤ (d1×BFL) / (d1+BFL) ≤ 6.3mm. Preferably, in embodiments E2-1 to E2-4 below, 3.491mm ≤ (d1×BFL) / (d1+BFL) ≤ 5.705mm; in embodiments E3-1 to E3-3 below, 3.325mm ≤ (d1×BFL) / (d1+BFL) ≤ 4.585mm; in embodiments E4-1 to E4-3 below, 3.491mm ≤ (d1×BFL) / (d1+BFL) ≤ 5.749mm; and in embodiments E5-1 to E5-4 below, 1.973mm ≤ (d1×BFL) / (d1+BFL) ≤ 3.071mm. By controlling this relationship, sufficient space can be left at the rear of the lens, thus achieving a long back focal length. In other words, if the optical back focal length (BFL) is too small, the calculated result of the above relationship will be too small to meet the conditions; conversely, if the thickness of the one-way curvature lens decreases, the optical back focal length (BFL) also needs to be increased to meet the specified range. Therefore, the above relationship can leave sufficient space at the rear of the lens while maintaining a reasonable lens thickness, thereby achieving a long back focal length and facilitating the installation of other optical components.

[0088] In an exemplary embodiment, for the optical path corresponding to the multimode laser source, the focal length fx in the x-direction and the focal length fy in the y-direction of each optical path in the lens assembly can satisfy: 1.2 ≤ fx / fy ≤ 4. Preferably, in the following embodiments E1-1 to E1-3, 1.443 ≤ fx / fy ≤ 1.458; in the following embodiments E2-1 to E2-4, 2.283 ≤ fx / fy ≤ 2.861; in the following embodiments E3-1 to E3-3, 2.731 ≤ fx / fy ≤ 3.228; in the following embodiments E4-1 to E4-3, 2.002 ≤ fx / fy ≤ 2.854; and in the following embodiments E5-1 to E5-4, 2.314 ≤ fx / fy ≤ 2.890. It is understood that the x-direction mentioned in this application corresponds to the fast axis direction of the laser source; and the y-direction mentioned in this application corresponds to the slow axis direction of the laser source.

[0089] For the optical path corresponding to a single-mode laser source, the focal length fx in the x-direction and the focal length fy in the y-direction of each optical path in the lens assembly can satisfy: 0.3 ≤ fx / fy ≤ 0.6. Preferably, in the following embodiments E4-1 to E4-3, 0.374 ≤ fx / fy ≤ 0.463; and in the following embodiments E5-1 to E5-4, 0.449 ≤ fx / fy ≤ 0.542.

[0090] By controlling the above relationship fx / fy, the focal length of the x-axis or y-axis light can be adjusted by the curvature radius of the lens within the system. By reasonably adjusting the ratio range, the difference in the size of the light spot on the projection position of the fast and slow axes can be reduced, thereby achieving the presentation of an elliptical or rectangular light spot on the projection surface in a certain proportion.

[0091] In an exemplary embodiment, for the optical path corresponding to the multimode laser source, R_E is the radius of curvature R_E of the light-emitting side of the last unidirectional curvature mirror in each optical path of the lens assembly, and the focal length fx of each optical path in the lens assembly in the x direction can satisfy: -1.4≤R_E / fx≤-0.2. Preferably, in the following embodiments E1-1 to E1-3, -0.948 ≤ R_E / fx ≤ -0.917; in the following embodiments E2-1 to E2-4, -0.904 ≤ R_E / fx ≤ -0.360; in the following embodiments E3-1 to E3-3, -0.850 ≤ R_E / fx ≤ -0.462; in the following embodiments E4-1 to E4-3, -0.809 ≤ R_E / fx ≤ -0.554; and in the following embodiments E5-1 to E5-4, -1.131 ≤ R_E / fx ≤ -0.809. By controlling this relationship, the curvature of the lens can be controlled within a specific range, ensuring that the concave surface is curved enough to guide the edge light inward and onto the projection surface perpendicularly, while preventing excessive curvature that would cause the light to deflect too much. This ensures that the light from all fields of view can reach the projection surface at a near-perpendicular angle, effectively eliminating edge shadows and improving the accuracy of imaging and measurement.

[0092] In an exemplary embodiment, for the optical path corresponding to a single-mode laser source, R_E is the radius of curvature R_E of the light-emitting side of the last unidirectional curvature mirror in each optical path of the lens assembly, which satisfies the following condition in the x-direction: R_E / fx ≥ 4. Preferably, in embodiments E4-1 to E4-3 below, 6.212 ≤ R_E / fx; in embodiments E5-1 to E5-4 below, 4.433 ≤ R_E / fx ≤ 7.777. By controlling this relationship, the radius of curvature of the last surface is limited to be greater than the focal length, which allows it to be designed as a flat surface with extremely low optical power. This significantly shifts the image-side principal plane back to construct the beam-expanding optical path and ensures that the corrected parallel beam can be transmitted without disturbance, ultimately achieving small telecentricity of the image side while expanding the beam.

[0093] In an exemplary embodiment, the focal length fx in the x-direction and the focal length fy in the y-direction of each optical path in the lens assembly can satisfy: 1≤max(fx / fy) / min(fx / fy)≤7. Preferably, in the following embodiments E1-1 to E1-3, 1.443 ≤ max(fx / fy) / min(fx / fy) ≤ 1.458; in the following embodiments E2-1 to E2-4, 1.239 ≤ max(fx / fy) / min(fx / fy) ≤ 1.253; in the following embodiments E3-1 to E3-3, 1.080 ≤ max(fx / fy) / min(fx / fy) ≤ 1.178; in the following embodiments E4-1 to E4-3, 5.611 ≤ max(fx / fy) / min(fx / fy) ≤ 6.234; and in the following embodiments E5-1 to E5-4, 5.191 ≤ max(fx / fy) / min(fx / fy) ≤ 5.328. It is understood that the max(fx / fy) mentioned in this application refers to the maximum value of the ratio between the focal length fx in the x direction and the focal length fy in the y direction of each optical path in the lens assembly; the max(fx / fy) mentioned in this application refers to the minimum value of the ratio between the focal length fx in the x direction and the focal length fy in the y direction of each optical path in the lens assembly.

[0094] By controlling the above relationship, the focal length ratio of different optical paths (such as red laser source, green laser source, and blue laser source) in the X / Y direction can be constrained, requiring that the ratio of its maximum value to minimum value be limited to a certain range. This ensures that the multicolor laser beams have highly consistent wavefront shape characteristics before beam combining, so that a synthesized light spot with regular shape, pure color, and uniform energy distribution can be formed after beam combining. This effectively eliminates beam combining dispersion and geometric deformation caused by the mismatch of astigmatic characteristics of different spectral components, and improves the spectral fidelity and illumination uniformity of the laser beam combining system.

[0095] In an exemplary embodiment, R_E is the radius of curvature R_E of the light-emitting side of the last unidirectional curvature mirror in each optical path of the lens assembly, and the focal length fx of each optical path in the lens assembly in the x-direction can satisfy: 1≤max(|R_E / fx|) / min(|R_E / fx|)≤2.6. Preferably, in the following embodiments E2-1 to E2-4, 1.068≤max(|R_E / fx|) / min(|R_E / fx|)≤2.277. By controlling this relationship, the dispersion of the normalized ratio (e.g., |R_E / fx|) of the emission end radius of curvature to the system focal length in different optical paths can be constrained, requiring that the ratio of its maximum value to its minimum value does not exceed 2.6, thereby forcing each optical path to maintain structural consistency in key optical control links. Furthermore, this control ensures a high degree of matching in wavefront shape and emission angle distribution of the multicolor laser beams, which helps to eliminate interference caused by differences in the optical characteristics of each channel during beam combining. Ultimately, while improving the quality of multi-wavelength laser beam combining, it significantly reduces the system's assembly sensitivity and tolerance requirements.

[0096] In an exemplary embodiment, the focal length fx in the x-direction and the focal length fy in the y-direction of each optical path in the lens assembly can satisfy: 1 ​​≤ max(fx) / min(fx) ≤ 6.5. Preferably, in embodiments E2-1 to E2-4 below, 1.258 ≤ max(fx) / min(fx) ≤ 1.273. By controlling this relationship, the ratio of the maximum to minimum focal length of different optical paths in the x-direction can be controlled within a suitable range. This provides reasonable space for differentiated optical design of each optical path for its specific wavelength and light source characteristics, while ensuring the basic performance of multi-wavelength laser beam combining. This avoids sacrificing image quality due to excessive pursuit of focal length uniformity, and ensures that the divergence characteristics and spot size of each color beam are within a coordinate range, ultimately achieving an optimized balance between optical performance and engineering feasibility.

[0097] In an exemplary embodiment, each optical path of the shaping and beam combining system is provided with two unidirectional curvature mirrors. The focal length fx1,l of the unidirectional curvature mirror closer to the collimating lens and the focal length fx2,l of the unidirectional curvature mirror farther from the collimating lens in the x direction can satisfy: 0.23≤|fx1,1| / |fx2,1|≤2.7. Preferably, in the following embodiments E2-1 to E2-4, 0.238 ≤ |fx1,1| / |fx2,1| ≤ 0.36; in the following embodiments E3-1 to E3-3, 0.348 ≤ |fx1,1| / |fx2,1| ≤ 0.442; in the following embodiments E4-1 to E4-3, 2.172 ≤ |fx1,1| / |fx2,1| ≤ 2.647; and in the following embodiments E5-1 to E5-4, 0.564 ≤ |fx1,1| / |fx2,1| ≤ 2.258. By controlling this relationship, the unidirectional curvature mirror near the collimating lens can be kept close enough to have sufficient optical power, so that its curvature is in a suitable proportion to that of the unidirectional curvature mirror far from the collimating lens. This can prevent the total optical power of the system from being excessively concentrated on a single lens or mirror surface, and promote the reasonable distribution of light deflection tasks between the two lenses. This significantly reduces the sensitivity of individual lenses to errors such as curvature and spacing during manufacturing and assembly, thereby reducing the sensitivity of the optical system.

[0098] In an exemplary embodiment, each optical path of the shaping and beam combining system is provided with two unidirectional curvature mirrors. In each optical path of the lens assembly, the curvature radius R1,l of the incident side and the curvature radius R2,l of the unidirectional curvature mirror near the collimating lens, the curvature radius R3,l of the incident side and the curvature radius R4,l of the unidirectional curvature mirror away from the collimating lens, the air gap d2 between the collimating lens and the unidirectional curvature mirror, and the air gap d3 between the two unidirectional curvature mirrors can satisfy: (|R1,l|+|R2,l|+|R3,l|+|R4,l|) / (d2+d3)≥5. Preferably, in embodiments E3-1 to E3-3 below, (|R1,l|+|R2,l|+|R3,l|+|R4,l|) / (d2+d3)≥6.669; in embodiments E5-1 to E5-4 below, (|R1,l|+|R2,l|+|R3,l|+|R4,l|) / (d2+d3)≥16.508. By controlling this relationship, the ratio of the sum of the side curvature radii of the two unidirectional curvature mirrors to the sum of the air gaps between the collimating lens and the two unidirectional curvature mirrors is kept sufficiently large, effectively preventing the overuse of lenses with excessively small curvature radii in pursuit of optical system compactness, thus avoiding the generation of higher-order aberrations; at the same time, it also ensures that the lens curvature radius is large and the optical path is long enough, which is conducive to fully correcting astigmatism, enabling the optical system to achieve a smaller spot of confusion and higher imaging quality, ultimately achieving high resolution.

[0099] In an exemplary embodiment, the air gap d3 between the two unidirectional curvature mirrors in each optical path of the lens assembly, the sagitta SAG1,l of the incident side of the unidirectional curvature mirror near the collimating lens, and the sagitta SAG2,l of the emitting side of the unidirectional curvature mirror away from the collimating lens can satisfy: 0.3mm ≤ d3 × |SAG1,l / SAG2,l| ≤ 12mm. Preferably, in embodiments E3-1 to E3-3 below, 0.386mm ≤ d3 × |SAG1,l / SAG2,l| ≤ 8.812mm; and in embodiments E5-1 to E5-4 below, 4.247mm ≤ d3 × |SAG1,l / SAG2,l| ≤ 9.427mm. By controlling this relationship, the product of the air gap d3 between the two unidirectional curvature mirrors and the relative sag ratio on the incident and exit surfaces must not exceed 12. This effectively prevents the light divergence angle from being too large due to the combination of an overly curved front mirror and an overly flat rear mirror within a limited distance. This avoids the vignetting phenomenon caused by edge light being blocked by the mirror tube or aperture, ensuring that the entire beam cross section can pass through the system efficiently, ultimately achieving high light throughput.

[0100] It is worth noting that in the following embodiments E4-1 to E4-3 and E5-1 to E5-4, the focal length ratio R(fx / fy) of the optical path containing the red laser source in the lens assembly in the x and y directions and the focal length ratio GB(fx / fy) of the optical path containing the green or blue laser source in the lens assembly in the x and y directions can satisfy: 0.15 ≤ R(fx / fy) / GB(fx / fy) ≤ 0.22. Preferably, in the following embodiments E4-1 to E4-3, 0.160 ≤ R(fx / fy) / GB(fx / fy) ≤ 0.206; and in the following embodiments E5-1 to E5-4, 0.188 ≤ R(fx / fy) / GB(fx / fy) ≤ 0.195. By controlling this relationship, the curvature radius of the lens in the system is adjusted so that the focal length of the light on the x-axis or y-axis is inconsistent; at the same time, the ratio of R(fx / fy) / GB(fx / fy) is reasonably adjusted so that the difference in spot size between the red spot and the blue-green spot at the projection position is reduced, thereby achieving the presentation of an elliptical spot of a certain proportion on the projection surface.

[0101] Furthermore, the red light emitted by the red laser source of this application can be shaped using a one-way curvature mirror to expand the ellipticity of the single-mode red laser spot from 1:1 to 1.5:1 to 2:1 to 2.5:1; or to compress the ellipticity of the multi-mode red laser spot from 10.9:1 to 10.4:1 to 2:1 to 2.5:1. And / or, the green and blue laser sources can utilize a one-way curvature mirror to compress the multi-mode blue-green laser spot from 6.1:1 to 6.8:1 to 2:1 to 2.5:1, solving the color cast problem caused by different laser modes and improving the projection quality of the system.

[0102] It should be noted that the laser source mentioned in this application may, but is not limited to, be implemented as a semiconductor laser with a fast axis between 40° and 50° and a slow axis between 10° and 20°.

[0103] Those skilled in the art will understand that this application focuses on protecting the optical architecture, and the lens surface shape is not limited to spherical or aspherical; if the focus is on resolving quality, all lenses can be aspherical. The lens material is also not limited to plastic and glass; if the focus is on temperature performance, all lenses can be glass.

[0104] However, those skilled in the art will understand that, without departing from the technical solutions claimed in this application, the number of lenses constituting the lens assembly can be changed to obtain the various results and advantages described in this specification. Specific embodiments of optical lenses applicable to the above-described embodiments are further described below with reference to the accompanying drawings. It should be understood that the units for the radius of curvature and thickness / distance in the basic parameters of the optical lens are mm.

[0105] Example E1-1

[0106] The following is for reference Figure 1 Describes a shaping and bundling system according to embodiment E1-1 of this application.

[0107] like Figure 1As shown, in the beam-combining system: the light source assembly includes a red laser source R, a green laser source G, and a blue laser source B; all three are multimode laser sources. The lens assembly includes: a third collimating lens L3 and a first unidirectional curvature mirror Z1 arranged sequentially along the light output direction of the red laser source R; a second collimating lens L2 arranged along the light output direction of the green laser source G; and a first collimating lens L1 arranged along the light output direction of the blue laser source B. The beam-combining assembly includes a first reflecting mirror M1 arranged along the light output direction of the blue laser source B; a first beam-combining device T1 for combining the beams emitted from the green laser source G and the blue laser source B; a second beam-combining device T2 for combining the beam emitted from the first beam-combining device T1 and the beam emitted from the red laser source R; and a second reflecting mirror M2, a third reflecting mirror M3, and a MEMS galvanometer arranged sequentially along the light output direction of the second beam-combining device T2.

[0108] The first collimating lens L1, the second collimating lens L2, and the third collimating lens L3 all have positive optical power. The incident light side S1 of the first collimating lens L1 is convex, and the exit light side S2 is convex. The incident light side S3 of the second collimating lens L2 is convex, and the exit light side S4 is convex. The incident light side S5 of the third collimating lens L3 is convex, and the exit light side S6 is convex. It can be understood that the first collimating lens L1, the second collimating lens L2, and the third collimating lens L3 have exactly the same basic parameters.

[0109] The first unidirectional curvature mirror Z1 has positive optical power, with its incident light side S7 being concave and its exit light side S8 being convex. Table 1 shows the basic parameters of the lens assembly in embodiment E1-1.

[0110] Table 1

[0111]

[0112] Example E1-2

[0113] The main difference between this embodiment and embodiment E1-1 is that the radius of curvature of the first unidirectional curvature mirror is different. Specifically, the radius of curvature of the light-incident side S7 of the first unidirectional curvature mirror Z1 is -2.657mm, and the radius of curvature of the light-exit side S8 is -3.863mm.

[0114] Example E1-3

[0115] The main difference between this embodiment and embodiment E1-1 is that the radius of curvature of the first unidirectional curvature mirror is different. Specifically, the radius of curvature of the light-incident side S7 of the first unidirectional curvature mirror Z1 is -2.741 mm, and the radius of curvature of the light-exit side S8 is -3.946 mm.

[0116] Example E2-1

[0117] The following is for reference Figure 2 Describes a shaping and bundling system according to embodiment E2-1 of this application.

[0118] like Figure 2 As shown, the main difference between this embodiment and embodiment E1-1 is that: along the light emission direction of the red laser source R, the following are sequentially arranged: a third collimating lens L3, a first unidirectional curvature mirror Z1, and a second unidirectional curvature mirror Z2; the third unidirectional curvature mirror Z3 is located in the optical path between the first beam combiner T1 and the second beam combiner T2. It can be understood that the first beam combiner T1 in this embodiment may, but is not limited to, be implemented as a filter that transmits blue light and reflects green light; the second beam combiner T2 in this embodiment may, but is not limited to, be implemented as a filter that transmits red light and reflects both blue and green light.

[0119] The first collimating lens L1 has a convex incident surface S1 and a convex exit surface S2. The second collimating lens L2 has a convex incident surface S3 and a convex exit surface S4. The third collimating lens L3 has a convex incident surface S7 and a convex exit surface S8. The first one-way curvature mirror Z1 has negative optical power, with a concave incident surface S9 and a concave exit surface S10. The second one-way curvature mirror Z2 has positive optical power, with a concave incident surface S11 and a convex exit surface S12. The third one-way curvature mirror Z3 has positive optical power, with a concave incident surface S5 and a concave exit surface S6. Table 2 shows the basic parameters of the lens assembly in embodiment E2-1.

[0120] Table 2

[0121]

[0122] Example E2-2

[0123] The main differences between this embodiment and embodiment E2-1 are: the incident side S9 of the first unidirectional curvature mirror Z1 is a plane; the radii of curvature of each unidirectional curvature mirror; and the thickness of the second unidirectional curvature mirror Z2 are different. Specifically, the radius of curvature of the incident side S9 of the first unidirectional curvature mirror Z1 is infinite, and the radius of curvature of the emitting side S10 is 1.915 mm; the radius of curvature of the incident side S11 of the second unidirectional curvature mirror Z2 is -6.075 mm, the radius of curvature of the emitting side S12 is -3.899 mm, and the thickness is 3.536 mm; the radius of curvature of the incident side S5 of the third unidirectional curvature mirror Z3 is -2.786 mm, and the radius of curvature of the emitting side S6 is -5.319 mm.

[0124] Example E2-3

[0125] The main differences between this embodiment and embodiment E2-1 are: the incident side S11 of the second unidirectional curvature mirror Z2 is a plane; the radius of curvature of each unidirectional curvature mirror; and the thickness of the second unidirectional curvature mirror are different. Specifically, the radius of curvature of the incident side S9 of the first unidirectional curvature mirror Z1 is -3.076 mm, and the radius of curvature of the emitting side S10 is 7.577 mm; the radius of curvature of the incident side S11 of the second unidirectional curvature mirror Z2 is infinite, the radius of curvature of the emitting side S12 is -6.426 mm, and the thickness is 3.508 mm; the radius of curvature of the incident side S5 of the third unidirectional curvature mirror Z3 is -2.786 mm, and the radius of curvature of the emitting side S6 is -5.318 mm.

[0126] Example E2-4

[0127] The main differences between this embodiment and embodiment E2-1 are: the light-emitting side S10 of the first unidirectional curvature mirror Z1 is a plane; the light-incident side S11 of the second unidirectional curvature mirror Z2 is a plane; the radii of curvature of each unidirectional curvature mirror are different; and the thickness of the second unidirectional curvature mirror is different. Specifically, the radius of curvature of the light-incident side S9 of the first unidirectional curvature mirror Z1 is -2.223 mm, and the radius of curvature of the light-emitting side S10 is infinite; the radius of curvature of the light-incident side S11 of the second unidirectional curvature mirror Z2 is infinite, the radius of curvature of the light-emitting side S12 is -7.377 mm, and the thickness is 3.509 mm; the radius of curvature of the light-incident side S5 of the third unidirectional curvature mirror Z3 is -2.786 mm, and the radius of curvature of the light-emitting side S6 is -5.318 mm.

[0128] Example E3-1

[0129] The following is for reference Figure 3 Describes a shaping and bundling system according to embodiment E3-1 of this application.

[0130] like Figure 3 As shown, the main difference between this embodiment and embodiment E1-1 is that: along the light emission direction of the red laser source, the following are arranged in sequence: the third collimating lens L3, the first one-way curvature mirror Z1, and the second one-way curvature mirror Z2; along the light emission direction of the green laser source, the following are arranged in sequence: the second collimating lens L2, the third one-way curvature mirror Z3, and the fourth one-way curvature mirror Z4; and along the light emission direction of the blue laser source, the following are arranged in sequence: the first collimating lens L1, the fifth one-way curvature mirror Z5, and the sixth one-way curvature mirror Z6.

[0131] The first collimating lens L1 has a convex incident surface S1 and a convex exit surface S2. The second collimating lens L2 has a convex incident surface S7 and a convex exit surface S8. The third collimating lens L3 has a convex incident surface S13 and a convex exit surface S14. The first one-way curvature mirror Z1 has negative optical power; its incident surface S15 and exit surface S16 are concave. The second one-way curvature mirror Z2 has positive optical power; its incident surface S17 is concave and its exit surface S18 is convex. The third one-way curvature mirror Z3 has negative optical power; its incident surface S9 is concave and its exit surface S10 is flat. The fourth one-way curvature mirror Z4 has positive optical power; its incident surface S11 is concave and its exit surface S12 is convex. The fifth one-way curvature mirror Z5 has negative optical power; its incident side S3 is concave, and its exit side S4 is flat. The sixth one-way curvature mirror Z6 has positive optical power; its incident side S5 is concave, and its exit side S6 is convex. It is understood that the third one-way curvature mirror Z3 and the fifth one-way curvature mirror Z5 have exactly the same basic parameters; the fourth one-way curvature mirror Z4 and the sixth one-way curvature mirror Z6 have exactly the same basic parameters. Table 3 shows the basic parameters of the lens assembly in embodiment E3-1.

[0132] Table 3

[0133]

[0134] Example E3-2

[0135] The main difference between this embodiment and embodiment E3-1 is that the light-emitting side surface S10 of the third unidirectional curvature mirror Z3 and the light-emitting side surface S4 of the fifth unidirectional curvature mirror Z5 are both concave surfaces; the curvature radius and thickness of each unidirectional curvature mirror are different. Specifically, Table 4 shows the basic parameter table of the lens assembly of embodiment E3-2.

[0136] Table 4

[0137]

[0138] Example E3-3

[0139] The main difference between this embodiment and embodiment E3-1 is that the light-incident side S11 of the fourth unidirectional curvature mirror Z4 and the light-incident side S5 of the sixth unidirectional curvature mirror Z6 are flat; the curvature radius and thickness of each unidirectional curvature mirror are different. Specifically, Table 5 shows the basic parameters of the lens assembly of embodiment E3-3.

[0140] Table 5

[0141]

[0142] Example E4-1

[0143] The following is for reference Figure 4 Describes a shaping and bundling system according to embodiment E4-1 of this application.

[0144] like Figure 4 As shown, the main difference between this embodiment and embodiment E2-1 is that the red laser source includes a first single-mode laser source R1 and a second single-mode laser source R2; a fourth collimating lens L4 is arranged along the light output direction of the first single-mode laser source R1; a third collimating lens L3 is arranged along the light output direction of the second single-mode laser source R2; and a first unidirectional curvature mirror Z1 and a second unidirectional curvature mirror Z2 are arranged sequentially along the optical paths of the emitted light rays from the first and second single-mode laser sources after beam combining. The beam combining assembly also includes a fourth reflecting mirror M4 arranged along the light output direction of the second single-mode laser source R2 and a third beam combining device T3 for combining the beams emitted from the first and second single-mode laser sources R1 and R2. It can be understood that the third beam combining device T3 in this embodiment can be, but is not limited to, implemented as a polarizing filter, used to reflect red light of one polarization state and transmit red light of another polarization state.

[0145] The first collimating lens L1 has a convex incident light side S1 and a convex exit light side S2. The second collimating lens L2 has a convex incident light side S3 and a convex exit light side S4. The third collimating lens L3 has a convex incident light side S7 and a convex exit light side S8. The fourth collimating lens L4 has a convex incident light side S9 and a convex exit light side S10. The first one-way curvature mirror Z1 has positive optical power, with a convex incident light side S11 and a flat exit light side S12. The second one-way curvature mirror Z2 has negative optical power, with a concave incident light side S13 and a concave exit light side S14. The third one-way curvature mirror Z3 has positive optical power, with a concave incident light side S5 and a convex exit light side S6. Table 6 shows the basic parameters of the lens assembly in embodiment E4-1.

[0146] Table 6

[0147]

[0148] Example E4-2

[0149] The main difference between this embodiment and embodiment E4-1 is that the light-emitting side surface S12 of the first unidirectional curvature mirror Z1 is convex; and the curvature radius and thickness of each unidirectional curvature mirror are different. Specifically, Table 7 shows the basic parameters of the lens assembly of embodiment E4-2.

[0150] Table 7

[0151]

[0152] Example E4-3

[0153] The main difference between this embodiment and embodiment E4-1 is that the light-emitting side surface S12 of the first unidirectional curvature mirror Z1 is convex, while the light-emitting side surface S14 of the second unidirectional curvature mirror Z2 is flat. The curvature radius and thickness of each unidirectional curvature mirror are different. Specifically, Table 8 shows the basic parameters of the lens assembly in embodiment E4-3.

[0154] Table 8

[0155]

[0156] Example E5-1

[0157] The following is for reference Figure 5 Describes a shaping and bundling system according to embodiment E5-1 of this application.

[0158] like Figure 5 As shown, the main difference between this embodiment and embodiment E3-1 is that: the red laser source includes a first single-mode laser source R1 and a second single-mode laser source R2; a fourth collimating lens L4, a first unidirectional curvature mirror Z1, a second unidirectional curvature mirror Z2, and a polarizing filter are sequentially arranged along the light output direction of the first single-mode laser source R1; a third collimating lens L3, a third unidirectional curvature mirror Z3, and a fourth unidirectional curvature mirror Z4 are sequentially arranged along the light output direction of the second single-mode laser source R2; a fifth unidirectional curvature mirror and a sixth unidirectional curvature mirror are sequentially arranged along the light output direction of the green laser source; and a seventh unidirectional curvature mirror and an eighth unidirectional curvature mirror are sequentially arranged along the light output direction of the blue laser source. The beam combining assembly also includes a third beam combining device T3 for combining the beam emitted through the first beam combining device T1 and the beam emitted by the second single-mode laser source R2. It is understood that the third beam combiner T3 in this embodiment may, but is not limited to, be implemented as a polarizing filter for transmitting blue and green light and reflecting red light of the second polarization state; the second beam combiner T2 in this embodiment may, but is not limited to, be implemented as another polarizing filter for transmitting red light of the first polarization state and reflecting blue light, green light and red light of the second polarization state.

[0159] The first collimating lens L1 has a convex incident surface S1 and a convex exit surface S2. The second collimating lens L2 has a convex incident surface S7 and a convex exit surface S8. The third collimating lens L3 has a convex incident surface S13 and a convex exit surface S14. The fourth collimating lens L4 has a convex incident surface S19 and a convex exit surface S20. The first one-way curvature mirror Z1 has positive optical power, with a convex incident surface S21 and a concave exit surface S22. The second one-way curvature mirror Z2 has negative optical power, with a flat incident surface S23 and a concave exit surface S24. The third one-way curvature mirror Z3 has positive optical power, with a convex incident surface S15 and a concave exit surface S16. The fourth one-way curvature mirror Z4 has negative optical power, with a flat incident surface S17 and a concave exit surface S18. The fifth one-way curvature mirror Z5 has negative optical power, with its incident side S9 being concave and its exiting side S10 being flat. The sixth one-way curvature mirror Z6 has positive optical power, with its incident side S11 being concave and its exiting side S12 being convex. The seventh one-way curvature mirror Z7 has negative optical power, with its incident side S3 being concave and its exiting side S4 being flat. The eighth one-way curvature mirror Z8 has positive optical power, with its incident side S5 being concave and its exiting side S6 being convex.

[0160] It is understood that S25 and S26 in the table below refer to the incident and exit sides of the polarizing filter, respectively. The first unidirectional curvature mirror Z1 and the third unidirectional curvature mirror Z3 have exactly the same basic parameters; the second unidirectional curvature mirror Z2 and the fourth unidirectional curvature mirror Z4 have exactly the same basic parameters; the fifth unidirectional curvature mirror Z5 and the seventh unidirectional curvature mirror Z7 have exactly the same basic parameters; and the sixth unidirectional curvature mirror Z6 and the eighth unidirectional curvature mirror Z8 have exactly the same basic parameters.

[0161] Table 9 shows the basic parameters of the lens assembly in Embodiment E5-1.

[0162] Table 9

[0163]

[0164] Example E5-2

[0165] The main difference between this embodiment and embodiment E5-1 is that the light-incident surface S5 of the second unidirectional curvature mirror Z2 and the fourth unidirectional curvature mirror Z4 is concave; the light-incident surface S9 of the sixth unidirectional curvature mirror Z6 and the eighth unidirectional curvature mirror Z8 is flat; and the radius of curvature and thickness of each unidirectional curvature mirror are different. Specifically, Table 10 shows the basic parameters of the lens assembly of embodiment E5-2.

[0166] Table 10

[0167]

[0168] Example E5-3

[0169] The main difference between this embodiment and embodiment E5-1 is that the incident light side surface S9 of the sixth unidirectional curvature mirror Z6 and the eighth unidirectional curvature mirror Z8 is a plane; the curvature radius and thickness of each unidirectional curvature mirror are different. Specifically, Table 11 shows the basic parameter table of the lens assembly of embodiment E5-3.

[0170] Table 11

[0171]

[0172] Example E5-4

[0173] The main difference between this embodiment and embodiment E5-1 is that the light-incident side S5 of the second unidirectional curvature mirror Z2 and the fourth unidirectional curvature mirror Z4 is concave; the light-exit side S8 of the fifth unidirectional curvature mirror Z5 and the seventh unidirectional curvature mirror Z7 is concave; and the radius of curvature and thickness of each unidirectional curvature mirror are different. Specifically, Table 12 shows the basic parameters of the lens assembly of embodiment E5-4.

[0174] Table 12

[0175]

[0176] Tables 13-1 and 13-5 provide the basic parameters of the lens assemblies in Examples E1-1 to E5-4, such as BFL, TTL, d1, fx, fy, R_E, R1,l, R2,l, R3,l, R4,l, d2, d3, SAG1,l, and SAG2,l. The units of the parameters in the tables are mm.

[0177] Table 13-1

[0178]

[0179] Table 13-2

[0180]

[0181] Table 13-3

[0182]

[0183] Table 13-4

[0184]

[0185] Table 13-5

[0186]

[0187] In summary, the relationships in each of the embodiments E1-1 to E5-4 satisfy the relationships shown in Tables 14-1 to 14-5.

[0188] Table 14-1

[0189]

[0190] Table 14-2

[0191]

[0192] Table 14-3

[0193]

[0194] Table 14-4

[0195]

[0196] Table 14-5

[0197]

[0198] This application also provides an electronic device that includes the shaping and beam-combining system described in the exemplary embodiments above. It is worth noting that this electronic device can be, but is not limited to, implemented as a projector or a head-up display, and can, but is not limited to, project via a MEMS (Micro-Electro-Mechanical System) device.

[0199] It is worth mentioning that this application also provides a vehicle that may include the aforementioned electronic equipment for projecting information.

[0200] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the concept of this application. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A shaping and bundling system, characterized in that, include: The light source assembly includes a red laser source, a green laser source, and a blue laser source; at least two of the laser sources in the light source assembly have different aspect ratios. The lens assembly includes a collimating lens and a one-way curvature mirror; each laser source in the light source assembly has at least one of the collimating lenses in its optical path; the optical path of the red laser source also has at least one of the one-way curvature mirrors; and A beam combiner assembly for combining multiple light beams emitted from the light source assembly; The optical parameters of the one-way curvature mirror are associated with at least one of the following: the aspect ratio of the laser beam from at least one laser source in the light source assembly, and the aspect ratio of the beam emitted by the beam combiner assembly.

2. The shaping and bundling system according to claim 1, characterized in that, The beam combining assembly includes a first beam combining device and a second beam combining device; the first beam combining device is used to combine the light beams emitted by the green laser source and the blue laser source; the second beam combining device is used to combine the light beam emitted by the first beam combining device and the light beam emitted by the red laser source. At least one of the unidirectional curvature mirrors is provided in the optical path between the first beam combiner and the second beam combiner.

3. The shaping and bundling system according to claim 1, characterized in that, The red laser source, the green laser source, and the blue laser source are all multimode laser sources.

4. The shaping and bundling system according to claim 1, characterized in that, The red laser source includes a first single-mode laser source and a second single-mode laser source; the optical paths of the first single-mode laser source and the second single-mode laser source are respectively provided with at least one of the unidirectional curvature mirrors before beam combining.

5. The shaping and bundling system according to claim 1, characterized in that, The red laser source includes a first single-mode laser source and a second single-mode laser source; after beam combining, the optical paths of the first single-mode laser source and the second single-mode laser source are provided with at least one of the unidirectional curvature mirrors.

6. The shaping and bundling system according to any one of claims 1 to 5, characterized in that, The beam shaping and combining system satisfies the following relationship: 4 ≤ max_aspect ratio / min_aspect ratio ≤ 12; where max_aspect ratio is the maximum value of the aspect ratio of the light spot in the red laser source, the green laser source and the blue laser source, and min_aspect ratio is the minimum value of the aspect ratio of the light spot in the red laser source, the green laser source and the blue laser source.

7. The shaping and bundling system according to any one of claims 1 to 5, characterized in that, The lens assembly satisfies the following relationship: 0.93≤BFL / TTL<1, and / or, 1.6mm≤(d1×BFL) / (d1+BFL)≤6.3mm; where BFL is the optical back focal length corresponding to each optical path in the lens assembly, TTL is the total optical length corresponding to each optical path in the lens assembly, and d1 is the thickness of the unidirectional curvature mirror near the image plane in each optical path of the lens assembly.

8. The shaping and bundling system according to any one of claims 1 to 3, characterized in that, The lens assembly satisfies the following relationship: 1.2≤fx / fy≤4; where fx is the focal length of each optical path in the lens assembly in the x-direction, and fy is the focal length of each optical path in the lens assembly in the y-direction.

9. The shaping and bundling system according to claim 4 or 5, characterized in that, The lens assembly satisfies the following relationship: 0.3≤fx / fy≤0.6; where fx is the focal length of each optical path in the lens assembly in the x-direction, and fy is the focal length of each optical path in the lens assembly in the y-direction.

10. The shaping and bundling system according to any one of claims 1 to 3, characterized in that, The lens assembly satisfies the following relationship: -1.4≤R_E / fx≤-0.2; where R_E is the radius of curvature of the light-emitting side of the last unidirectional curvature mirror in each optical path of the lens assembly, and fx is the focal length of each optical path in the lens assembly in the x-direction.

11. The shaping and bundling system according to claim 4 or 5, characterized in that, The lens assembly satisfies the following relationship: R_E / fx≥4; where R_E is the radius of curvature of the light-emitting side of the last unidirectional curvature mirror in each optical path of the lens assembly, and fx is the focal length of each optical path in the lens assembly in the x-direction.

12. The shaping and bundling system according to any one of claims 1 to 5, characterized in that, The lens assembly satisfies the following relationship: 1≤max(fx / fy) / min(fx / fy)≤7, and / or, 1≤max(|R_E / fx|) / min(|R_E / fx|)≤2.6; where fx is the focal length of each optical path in the lens assembly in the x-direction, fy is the focal length of each optical path in the lens assembly in the y-direction, and R_E is the radius of curvature of the light-emitting side of the last unidirectional curvature mirror in each optical path of the lens assembly.

13. The shaping and bundling system according to any one of claims 1 to 5, characterized in that, The lens assembly satisfies the following relationship: 1≤max(fx) / min(fx)≤6.5; where fx is the focal length of each optical path in the lens assembly in the x-direction, and fy is the focal length of each optical path in the lens assembly in the y-direction.

14. The shaping and bundling system according to any one of claims 1 to 5, characterized in that, Each optical path of the shaping and beam combining system is provided with two unidirectional curvature mirrors, and the lens assembly satisfies the relationship: 0.23≤|fx1,1| / |fx2,1|≤2.7; where fx1,1 is the focal length in the x-direction of the unidirectional curvature mirror closer to the collimating lens in each optical path of the lens assembly, and fx2,1 is the focal length in the x-direction of the unidirectional curvature mirror farther from the collimating lens in each optical path of the lens assembly.

15. The shaping and bundling system according to any one of claims 1 to 5, characterized in that, Each optical path of the shaping and beam combining system is provided with two unidirectional curvature mirrors, and the lens assembly satisfies the following relationship: (|R1,l|+|R2,l|+|R3,l|+|R4,l|) / (d2+d3)≥5; where R1,l is the radius of curvature of the incident light side of the unidirectional curvature mirror near the collimating lens in each optical path of the lens assembly, R2,l is the radius of curvature of the exit light side of the unidirectional curvature mirror near the collimating lens in each optical path of the lens assembly, R3,l is the radius of curvature of the incident light side of the unidirectional curvature mirror away from the collimating lens in each optical path of the lens assembly, R4,l is the radius of curvature of the exit light side of the unidirectional curvature mirror away from the collimating lens in each optical path of the lens assembly, d2 is the air gap between the collimating lens and the unidirectional curvature mirror in each optical path of the lens assembly, and d3 is the air gap between the two unidirectional curvature mirrors in each optical path of the lens assembly.

16. The shaping and bundling system according to any one of claims 1 to 5, characterized in that, Each optical path of the shaping and beam combining system is provided with two unidirectional curvature mirrors, and the lens assembly satisfies the following relationship: 0.3mm≤d3×|SAG1,l / SAG2,l|≤12mm; where d3 is the air gap between the two unidirectional curvature mirrors in each optical path of the lens assembly, SAG1,l is the sag of the incident light side of the unidirectional curvature mirror closer to the collimating lens in each optical path of the lens assembly, and SAG2,l is the sag of the exit light side of the unidirectional curvature mirror farther from the collimating lens in each optical path of the lens assembly.

17. The shaping and bundling system according to claim 1, characterized in that, The lens assembly consists of a first collimating lens corresponding to the blue laser light source, a second collimating lens corresponding to the green laser light source, a third collimating lens corresponding to the red laser light source, and a one-way curvature mirror; the one-way curvature mirror is located on the light-emitting side of the third collimating lens. The first collimating lens, the second collimating lens, and the third collimating lens are all biconvex lenses with positive optical power; The one-way curvature mirror has positive optical power; the light-incident side of the one-way curvature mirror is concave, and the light-exit side of the one-way curvature mirror is convex.

18. The shaping and bundling system according to claim 1, characterized in that, The lens assembly comprises a first collimating lens corresponding to the blue laser source, a second collimating lens corresponding to the green laser source, a third collimating lens corresponding to the red laser source, a first one-way curvature mirror, a second one-way curvature mirror, and a third one-way curvature mirror; the first one-way curvature mirror and the second one-way curvature mirror are sequentially arranged on the light-emitting side of the third collimating lens; the third one-way curvature mirror is arranged in the optical path after the outgoing light from the green laser source and the outgoing light from the blue laser source are combined. The first collimating lens, the second collimating lens, and the third collimating lens are all biconvex lenses with positive optical power; The first one-way curvature mirror has negative optical power; the light-incident side of the first one-way curvature mirror is concave or flat, and the light-exit side of the first one-way curvature mirror is concave or flat. The second one-way curvature mirror has positive optical power; the light-incident side of the second one-way curvature mirror is concave or flat, and the light-exit side of the first one-way curvature mirror is convex. The third one-way curvature mirror has positive optical power; the light-incident side of the third one-way curvature mirror is concave, and the light-exit side of the third one-way curvature mirror is convex.

19. The shaping and bundling system according to claim 1, characterized in that, The lens assembly comprises a first collimating lens, a second collimating lens, a third collimating lens, a first one-way curvature mirror, a second one-way curvature mirror, a third one-way curvature mirror, a fourth one-way curvature mirror, a fifth one-way curvature mirror, and a sixth one-way curvature mirror; the third collimating lens, the first one-way curvature mirror, and the second one-way curvature mirror are arranged sequentially in the light emission direction of the red laser source; the second collimating lens, the third one-way curvature mirror, and the fourth one-way curvature mirror are arranged sequentially in the light emission direction of the green laser source; and the first collimating lens, the fifth one-way curvature mirror, and the sixth one-way curvature mirror are arranged sequentially in the light emission direction of the blue laser source. The first collimating lens, the second collimating lens, and the third collimating lens are all biconvex lenses with positive optical power; The first one-way curvature mirror has negative optical power; the light-incident side of the first one-way curvature mirror is concave, and the light-outcature side of the first one-way curvature mirror is concave. The second one-way curvature mirror has positive optical power; the light-incident side of the second one-way curvature mirror is concave, and the light-outcature side of the first one-way curvature mirror is convex. Both the third and fifth one-way curvature mirrors have negative optical power; the light-incident side surfaces of both the third and fifth one-way curvature mirrors are concave, and the light-outceasing side surfaces are either flat or concave. Both the fourth and sixth one-way curvature mirrors have positive optical power; the light-incident surfaces of both the fourth and sixth one-way curvature mirrors are concave or flat, and the light-outceasing surfaces are convex.

20. The shaping and bundling system according to claim 5, characterized in that, The lens assembly comprises a first collimating lens corresponding to the blue laser source, a second collimating lens corresponding to the green laser source, a fourth collimating lens corresponding to the first single-mode laser source, a third collimating lens corresponding to the second single-mode laser source, a first unidirectional curvature mirror, a second unidirectional curvature mirror, and a third unidirectional curvature mirror; the first unidirectional curvature mirror and the second unidirectional curvature mirror are sequentially arranged in the optical path after the emitted light from the first single-mode laser source and the emitted light from the second single-mode laser source are combined; the third unidirectional curvature mirror is arranged in the optical path after the emitted light from the green laser source and the emitted light from the blue laser source are combined. The first collimating lens, the second collimating lens, the third collimating lens, and the fourth collimating lens are all biconvex lenses with positive optical power; The first one-way curvature mirror has positive optical power; the light-incident side of the first one-way curvature mirror is convex, and the light-exit side of the first one-way curvature mirror is either flat or convex. The second one-way curvature mirror has negative optical power; the light-incident side of the second one-way curvature mirror is concave, and the light-exit side of the first one-way curvature mirror is concave or flat. The third one-way curvature mirror has positive optical power; the light-incident side of the third one-way curvature mirror is concave, and the light-exit side of the third one-way curvature mirror is convex.

21. The shaping and bundling system according to claim 4, characterized in that, The lens assembly comprises a first collimating lens, a second collimating lens, a third collimating lens, a fourth collimating lens, a first one-way curvature mirror, a second one-way curvature mirror, a third one-way curvature mirror, a fourth one-way curvature mirror, a fifth one-way curvature mirror, a sixth one-way curvature mirror, a seventh one-way curvature mirror, and an eighth one-way curvature mirror. The fourth collimating lens, the first one-way curvature mirror, and the second one-way curvature mirror are arranged sequentially in the light emission direction of the first single-mode laser source. The third collimating lens, the third one-way curvature mirror, and the fourth one-way curvature mirror are arranged sequentially in the light emission direction of the second single-mode laser source. The second collimating lens, the fifth one-way curvature mirror, and the sixth one-way curvature mirror are arranged sequentially in the light emission direction of the green laser source. The first collimating lens, the seventh one-way curvature mirror, and the eighth one-way curvature mirror are arranged sequentially in the light emission direction of the blue laser source. The first collimating lens, the second collimating lens, the third collimating lens, and the fourth collimating lens are all biconvex lenses with positive optical power; Both the first one-way curvature mirror and the third one-way curvature mirror have positive optical power; the light-incident side of both the first one-way curvature mirror and the light-outcature side of both the third one-way curvature mirror are convex and concave respectively. Both the second one-way curvature mirror and the fourth one-way curvature mirror have negative optical power; the light-incident side of both the second one-way curvature mirror and the fourth one-way curvature mirror is either a plane or a concave surface, and the light-outceasing side is always a concave surface. Both the fifth and seventh one-way curvature mirrors have negative optical power; the light-incident side surfaces of both the fifth and seventh one-way curvature mirrors are concave, and the light-outceasing side surfaces are either flat or concave. Both the sixth and eighth one-way curvature mirrors have positive optical power; the light-incident side of both the sixth and eighth one-way curvature mirrors is concave or flat, and the light-outceasing side is convex.

22. The shaping and bundling system according to any one of claims 1 to 5, characterized in that, The shaping and bundling system satisfies at least one of the following relationships: 6≤max_aspect ratio / min_aspect ratio≤11, 0.975≤BFL / TTL<1, 1.443≤fx / fy≤1.458, -0.948≤R_E / fx≤-0.917, 1.443≤max(fx / fy) / min(fx / fy)≤1.458; 0.967≤BFL / TTL<1, 3.491mm≤(d1×BFL) / (d1+BFL)≤5.705mm, 2.283≤fx / fy≤2.861, -0.904≤R_E / fx≤-0.360, 1.239≤max(fx / fy) / min (fx / fy)≤1.253, 1.068≤max(|R_E / fx|) / min(|R_E / fx|)≤2.277, 1.258≤max(fx) / min(fx)≤1.273, 0.238≤|fx1,1| / |fx2,1|≤0.36; 0.976≤BFL / TTL<1, 3.325mm≤(d1×BFL) / (d1+BFL)≤4.585mm, 2.731≤fx / fy≤3.228, -0.850≤R_E / fx≤-0.462, 1.080≤max(fx / fy) / min(fx / fy)≤1.178, (|R1,l|+|R2,l|+|R3,l|+|R4,l|) / (d2+d3)≥6.669 and 0.386mm≤d3×|SAG1,l / SAG2,l|≤8.812mm, 0.348≤|fx1,1| / |fx2,1|≤0.442; 0.956≤BFL / TTL<1, 3.491mm≤(d1×BFL) / (d1+BFL)≤5.749mm, 2.002≤fx / fy≤2.854 or 0.374≤fx / fy≤0.463, -0.809≤R_E / fx≤-0.554 or 6.212≤R_E / fx, 5.611≤max(fx / fy) / min(fx / fy)≤6.234, 0.160≤R(fx / fy) / GB(fx / fy)≤0.206, 2.172≤|fx1,1| / |fx2,1|≤2.647; 0.985≤BFL / TTL<1, 1.973mm≤(d1×BFL) / (d1+BFL)≤3.071mm, 2.314≤fx / fy≤2.890 or 0.449≤fx / fy≤0.542, -1.131≤R_E / fx≤-0.809 or 4.433≤R_E / fx≤7.777, 5.191≤max(fx / fy) / min(fx / fy)≤5.328, (|R1,l|+|R2,l|+|R3,l|+|R4,l|) / (d2+d3)≥16.508, 4.247mm≤d3×|SAG1,l / SAG2,l|≤9.427mm, 0.188≤R(fx / fy) / GB(fx / fy)≤0.195, 0.564≤|fx1,1| / |fx2,1|≤2.258; Wherein, max_aspect ratio is the maximum aspect ratio of the light spot in the red laser source, the green laser source, and the blue laser source; min_aspect ratio is the minimum aspect ratio of the light spot in the red laser source, the green laser source, and the blue laser source; BFL is the optical back focal length corresponding to each optical path in the lens assembly; TTL is the total optical length corresponding to each optical path in the lens assembly; d1 is the thickness of the one-way curvature mirror near the image plane in each optical path of the lens assembly; and fx is the thickness of each... The focal length of the light path in the x-direction, fy is the focal length of each light path in the lens assembly in the y-direction, R_E is the radius of curvature of the exiting side of the last one-way curvature mirror in each light path of the lens assembly, R1,l is the radius of curvature of the incident side of the one-way curvature mirror near the collimating lens in each light path of the lens assembly, R2,l is the radius of curvature of the exiting side of the one-way curvature mirror near the collimating lens in each light path of the lens assembly, and R3,l is the radius of curvature of the incident side of the one-way curvature mirror away from the collimating lens in each light path of the lens assembly. The radius of curvature of the side surface, R4,l, is the radius of curvature of the exit side surface of the one-way curvature mirror away from the collimating lens in each optical path of the lens assembly; d2 is the air gap between the collimating lens and the one-way curvature mirror in each optical path of the lens assembly; d3 is the air gap between the two one-way curvature mirrors in each optical path of the lens assembly; SAG1,l is the sagitta of the incident side surface of the one-way curvature mirror near the collimating lens in each optical path of the lens assembly; SAG2,l is the sagitta of the one-way curvature mirror away from the collimating lens in each optical path of the lens assembly. The sag of the light-emitting side of the one-way curvature mirror, R(fx / fy) is the ratio of the focal lengths of the optical path containing the red laser source in the lens assembly in the x and y directions, GB(fx / fy) is the ratio of the focal lengths of the optical path containing the green laser source or the blue laser source in the lens assembly in the x and y directions, fx1,l is the focal length of the one-way curvature mirror closest to the collimating lens in each optical path of the lens assembly in the x direction, and fx2,l is the focal length of the one-way curvature mirror furthest from the collimating lens in each optical path of the lens assembly in the x direction.

23. An electronic device, characterized in that, include: The shaping and bundling system as described in any one of claims 1 to 22.

Images