High-illumination projection assembly and welcome light

Abstract

The application discloses a high-illumination projection assembly and a welcome lamp, which comprise an illumination lens group, an imaging lens group and a shell assembly; the imaging lens group comprises, in sequence from the image side to the object side, a first lens with positive refractive power, a second lens with negative refractive power and a third lens with positive refractive power; the imaging lens group has three lenses with refractive power; the illumination lens group comprises, in sequence from the image side to the object side, a fourth lens with positive refractive power and a fifth lens with positive refractive power; the imaging lens group satisfies the following conditional expression: 54.115mm < f123 / tan (Semi-Fov1) < 134.382mm; the imaging range of the imaging lens group can be wide, the pattern projected by the projection assembly has higher recognition and the imaging is clearer.

Description

Technical Field

[0001] This invention relates to the field of optical imaging technology, and in particular to a high-intensity projection component and a welcome light. Background Technology

[0002] As automobiles continue to develop towards intelligence and technology, many cars on the market now have welcome lights installed on their exterior rearview mirrors. When welcome lights are installed on the exterior rearview mirrors, they can project patterns or graphics onto the ground as people get in and out of the car, thereby increasing the car's sense of technology.

[0003] However, when the ambient light is strong, if the illumination of the welcome light projection pattern is low or the image quality of the projection pattern is insufficient, the projection pattern will become blurry, making the projected pattern unclear. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a high-illuminance projection component and welcome light with clear projection patterns, high pattern recognition and high illuminance.

[0005] In a first aspect, a high-illuminance projection assembly includes an illumination lens group for focusing light from a light source, an imaging lens group for adjusting the field of view of the light image, and a housing assembly; the imaging lens group is mounted on the image-side end of the housing assembly, and the illumination lens group is mounted on the object-side end of the housing assembly.

[0006] The imaging lens group includes, sequentially from the image side to the object side:

[0007] The first lens with positive optical power has an image-side surface that is convex near the optical axis.

[0008] The second lens with negative optical power has an image-side surface that is concave near the optical axis.

[0009] A third lens with positive optical power has a convex object-side surface near the optical axis;

[0010] The imaging lens group has three lenses with optical power;

[0011] The illumination lens group comprises, sequentially from the image side to the object side, the following:

[0012] A fourth lens with positive optical power;

[0013] A fifth lens with positive optical power;

[0014] The imaging lens group satisfies the following condition:

[0015] 54.115mm <f123 / tan(Semi-Fov1)<134.382mm;

[0016] 3.930 <f123 / f45<5.838;

[0017] Wherein, f123 is the combined focal length of the first lens, the second lens, and the third lens; Semi-Fov1 is half of the maximum field of view of the imaging lens group; f123 is the combined focal length of the first lens, the second lens, and the third lens; and f45 is the combined focal length of the fourth lens and the fifth lens.

[0018] In one embodiment, the imaging lens group satisfies the following condition:

[0019] 1.510 <f3 / f12<59.887

[0020] Where f3 is the effective focal length of the third lens, and f12 is the combined focal length of the first lens and the second lens.

[0021] In one embodiment, the projection component satisfies the following condition:

[0022] 0.667<(CT4+CT5) / (CT1+CT2+CT3)<0.979;

[0023] Wherein, CT1 is the center thickness of the first lens on the optical axis, CT2 is the center thickness of the second lens on the optical axis, CT3 is the center thickness of the third lens on the optical axis, CT4 is the center thickness of the fourth lens on the optical axis, and CT5 is the center thickness of the fifth lens on the optical axis.

[0024] In one embodiment, the imaging lens group satisfies the following condition:

[0025] 11.727 < |f2 / CT2| < 24.605;

[0026] Where f2 is the effective focal length of the second lens, and CT2 is the center thickness of the second lens on the optical axis.

[0027] In one embodiment, the imaging lens group satisfies the following condition:

[0028] 0.645 < |f23 / T23| < 1.673;

[0029] Where f23 is the combined focal length of the second lens and the third lens, and T23 is the air gap distance between the second lens and the third lens on the optical axis.

[0030] In one embodiment, the projection component satisfies the following condition:

[0031] 13.231 <EPD / (DT11-DT12)<18.625;

[0032] Wherein, EPD is the entrance pupil diameter of the imaging lens group; DT11 is the maximum effective radius of the image side of the first lens; and DT12 is the maximum effective radius of the object side of the first lens.

[0033] In one embodiment, the imaging lens group satisfies the following condition:

[0034] 3.845<(DT11-DT22) / T12<9.852;

[0035] Wherein, DT11 is the maximum effective radius of the image side of the first lens; DT22 is the maximum effective radius of the object side of the second lens; and T12 is the air gap between the first lens and the second lens on the optical axis.

[0036] In one embodiment, the imaging lens group satisfies the following condition:

[0037] 1.093<(R22-R21) / (R22+R21)<2.332;

[0038] Wherein, R21 is the radius of curvature of the image-side surface of the second lens; R22 is the radius of curvature of the object-side surface of the second lens.

[0039] In one embodiment, the imaging lens group satisfies the following condition:

[0040] 1.534 < (SAG11 - SAG12) / ET1 < 2.309

[0041] SAG11 is the distance on the optical axis from the intersection of the image-side surface of the first lens and the optical axis to the vertex of the effective radius of the image-side surface of the first lens; SAG12 is the distance on the optical axis from the intersection of the object-side surface of the first lens and the optical axis to the vertex of the effective radius of the object-side surface of the first lens; ET1 is the edge thickness of the first lens.

[0042] In a second aspect, a welcome light is provided, which includes the high-intensity projection component in any possible implementation manner of the first aspect. The high-intensity projection component includes an illumination lens group for focusing the light of the light source, an imaging lens group for adjusting the imaging field angle of the light, and a housing component; the housing component includes an imaging barrel, an illumination barrel, and an end cap. One end of the imaging barrel is threadedly connected to the end cap, and the other end of the imaging barrel is threadedly connected to the illumination barrel. The first lens, the second lens, and the third lens are sequentially installed in the imaging barrel from the image side to the object side; a spacer is provided between the second lens and the third lens; a first waterproof ring is provided between the outer wall of the first lens and the inner wall of the imaging barrel; a second waterproof ring is provided at the contact between the imaging barrel and the illumination barrel in the optical axis direction; the film is disposed between the imaging lens group and the illumination lens group and is fixed in the illumination barrel by dispensing. The fourth lens and the fifth lens are sequentially installed in the illumination barrel..

[0043] The beneficial effects of the present invention are as follows:

[0044] Constraining 54.115mm < f123 / tan(Semi-Fov1) < 134.382mm can make the imaging range of the imaging lens group relatively wide, so that the pattern projected by the projection component has higher recognition and clearer imaging; constraining f123 / f45 within a reasonable range makes the light emitted by the illumination lens group project onto the film intensively, improving the utilization rate of the light of the illumination lens group, which is beneficial to improving the illuminance of the projection pattern, making the projection pattern clearly visible even when the external environmental light such as outdoors during the day is strong. The closer the distance from the fifth lens to the LED, the higher the light utilization rate can be, but it cannot be too close to avoid the change of the lens surface shape caused by the heat of the light source. Constraining f45 within a reasonable range makes the distance from the fifth lens to the LED within a reasonable range, which is beneficial to improving the light utilization rate, increasing the light input, ensuring the high quality of the imaging of the imaging lens group, and thus ensuring the high quality of the pattern projected by the projection component. Description of the Drawings

[0045] Figure 1 is a schematic structural diagram of the imaging lens group of Embodiment 1 of the present application;

[0046] Figure 2 is a graph of the illuminance measurement of the projection pattern in the high-intensity projection component of Embodiment 1 of the present application;

[0047] Figure 3 and Figure 4 are respectively the mapping graphs of the length and width directions of the projection pattern of Embodiment 1 of the present application;

[0048] Figures 5 to 8 are respectively the spherical aberration curve graph, astigmatism curve graph, distortion graph, and longitudinal chromatic aberration graph of the imaging lens group of Embodiment 1 of the present application;

[0049] Figure 9 This is a schematic structural diagram of the imaging lens group of Embodiment 2 of this application;

[0050] Figure 10 This is an illuminance measurement diagram of the projection pattern in the high-illuminance projection component of Embodiment 2 of this application;

[0051] Figure 11 and Figure 12 These are, respectively, measurement drawings of the projection pattern in the length and width directions of Embodiment 2 of this application;

[0052] Figures 13 to 16 The images shown in this application, in order, are the spherical aberration curve, astigmatism curve, distortion diagram, and magnification chromatic aberration diagram of the imaging lens group of Embodiment 2.

[0053] Figure 17 This is a schematic structural diagram of the imaging lens group of Embodiment 3 of this application;

[0054] Figure 18 This is an illuminance measurement diagram of the projection pattern in the high-illuminance projection component of Embodiment 3 of this application;

[0055] Figure 19 and Figure 20 These are, respectively, measurement drawings of the projection pattern in the length and width directions of Embodiment 3 of this application;

[0056] Figures 21 to 24 The images shown in this application, in order, are the spherical aberration curve, astigmatism curve, distortion diagram, and magnification chromatic aberration diagram of the imaging lens group of Embodiment 3.

[0057] Figure 25 This is a schematic structural diagram of the imaging lens group of Embodiment 4 of this application;

[0058] Figure 26 This is an illuminance measurement diagram of the projection pattern in the high-illuminance projection component of Embodiment 4 of this application;

[0059] Figure 27 and Figure 28 These are, respectively, measurement drawings of the projection pattern in the length and width directions of Embodiment 4 of this application;

[0060] Figures 29 to 32 The images shown in sequence are the spherical aberration curve, astigmatism curve, distortion diagram, and magnification chromatic aberration diagram of the imaging lens group in Embodiment 4 of this application.

[0061] Figure 33 This is a schematic structural diagram of the high-intensity projection component of this application;

[0062] Figure 34 This is a schematic structural diagram of the housing in the high-intensity projection component of this application;

[0063] Figure 35This is a positioning diagram of the pattern on the film in the high-intensity projection component of this application.

[0064] In the diagram: 100, high-intensity projection assembly; 10, imaging lens group; 11, first lens; 12, second lens; 13, third lens; 20, illumination lens group; 21, fourth lens; 22, fifth lens; 30, housing assembly; 31, imaging lens tube; 32, illumination lens tube; 33, end cap; 40, film; 50, spacer; 60, first waterproof ring; 70, second waterproof ring. Detailed Implementation

[0065] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0066] For ease of understanding, the technical terms used in this application will be explained and described below.

[0067] It should be noted that, for ease of understanding and description, the embodiments of this application define the representation of relevant parameters of the imaging lens group. For example, TTL represents the distance on the optical axis from the object side of the first lens to the imaging surface of the optical lens; ImgH represents the maximum image height of the imaging lens group. The letter representations in similar definitions are merely illustrative, and other forms can also be used. This application does not impose any limitations on these representations.

[0068] It should also be noted that the units of the parameters involving ratios in the following formulas are consistent. For example, the unit of the numerator is millimeters (mm), and the unit of the denominator is also millimeters (mm).

[0069] It should also be noted that the sign of the radius of curvature indicates whether the optical surface is convex to the object side or the image side. When the optical surface (including the object side or the image side) is convex to the object side, the radius of curvature of the optical surface is positive; when the optical surface (including the object side or the image side) is convex to the image side, it is equivalent to the optical surface being concave to the object side, and the radius of curvature of the optical surface is negative.

[0070] It should also be noted that the shape of the lens and the degree of concavity and convexity of the object side and image side in the accompanying drawings are merely schematic and do not limit the embodiments of this application. In this application, the lens material can be resin, plastic, or glass. Lenses include spherical lenses and aspherical lenses. The lens can be a fixed focal length lens, a zoom lens, a standard lens, a short focal length lens, or a long focal length lens.

[0071] See Figure 1 , Figure 33 and Figure 34 , Figure 1 The dotted line in Figure 1 is used to represent the optical axis.

[0072] The high-intensity illumination projection component 100 in this embodiment includes an illumination lens group 20 for focusing the light of the light source, an imaging lens group 10 for adjusting the imaging field angle of the light, and a housing component 30; the housing component 30 includes an imaging barrel 31, an illumination barrel 32, and an end cap 33. One end of the imaging barrel 31 is threadedly connected to the end cap 33, and the other end of the imaging barrel 31 is threadedly connected to the illumination barrel 32. The first lens 11, the second lens 12, and the third lens 13 are sequentially installed in the imaging barrel 31 from the image side to the object side; a spacer 50 is provided between the second lens 12 and the third lens 13; a first waterproof ring 60 is provided between the outer wall of the first lens 11 and the inner wall of the imaging barrel 31; a second waterproof ring 70 is provided at the contact of the imaging barrel 31 and the illumination barrel 32 in the optical axis direction; the film 40 is provided between the imaging lens group 10 and the illumination lens group 20 and is fixed in the illumination barrel 32 by dispensing glue. The fourth lens 21 and the fifth lens 22 are sequentially installed in the illumination barrel 32 from the image side to the object side.

[0073] The imaging lens group 10 sequentially includes along the image side to the object side: a first lens 11 with a positive optical power, whose image side is convex near the optical axis; a second lens 12 with a negative optical power, whose image side is concave near the optical axis; a third lens 13 with a positive optical power, whose object side is convex near the optical axis; the number of lenses in the imaging lens group 10 is three; the illumination lens group 20 sequentially includes along the image side to the object side: a fourth lens 21 with a positive optical power; a fifth lens 22 with a positive optical power; the imaging lens group 10 satisfies the following conditional formula: 54.115mm < f123 / tan(Semi-Fov1) < 134.382mm; 13.231 < EPD / (DT11 - DT12) < 18.625. A film 40 is provided between the imaging lens group 10 and the illumination lens group 20, and a projection pattern is provided on the film 40. The film 40 is fixed in the housing component 30 by dispensing glue.

[0074] In this embodiment, the high-intensity illumination projection component 100 satisfies the following conditional formula:

[0075] 54.115mm < f123 / tan(Semi-Fov1) < 134.382mm; f123 / tan(Semi-Fov1) can be 134.382mm, 121.272mm, 76.272mm, or 54.115mm; Constraining 54.115 < f123 / tan(Semi-Fov1) < 134.382 and 54.115mm < f123 / tan(Semi-Fov1) < 134.382mm can make the imaging range of the imaging lens group wider, so that the pattern projected by the projection component has higher recognition and clearer imaging;

[0076] In this embodiment, the high-brightness projection component 100 also satisfies the following conditional formula: 3.930 < f123 / f45 < 5.838; f123 / f45 can be 5.838, 5.762, 4.567, or 3.930; Constraining f123 / f45 within a reasonable range can make the light emitted by the illumination lens group project onto the film sheet concentratedly, improve the utilization rate of the light of the illumination lens group, be conducive to increasing the illuminance of the projection pattern, and make the projection pattern clearly visible when the external environmental light such as outdoors during daytime is strong; The closer the distance from the fifth lens to the LED is, the more it can improve the light utilization rate, but it cannot be too close to avoid the change of the lens surface shape caused by the heat of the light source. Constraining f45 within a reasonable range can make the distance from the fifth lens to the LED within a reasonable range, which is conducive to improving the light utilization rate, increasing the light input, ensuring the high quality of the imaging of the imaging lens group, and thus ensuring the high quality of the projection pattern projected by the projection component.

[0077] In one of the embodiments, the high-brightness projection component 100 satisfies the following conditional formula: 1.510 < f3 / f12 < 59.887; f3 / f12 can be 59.887, 1.828, 1.510, or 1.792; When 1.510 < f3 / f12 < 59.887, controlling the ratio of the focal length of the third lens to the combined focal length of the first and second lenses within a reasonable range is conducive to reducing the size difference between the first lens, the second lens, and the third lens during the production process of the imaging lens group, thereby reducing the size sensitivity during the processing of the first, second, and third lenses, improving the stability of the imaging quality, and further improving the production yield of the imaging lens group. In addition, controlling the ratio of the focal length of the third lens to the combined focal length of the first and second lenses within a reasonable range allows the third lens and the combination of the first and second lenses to reasonably bear the light power contribution rate of the imaging lens group, which is conducive to improving the imaging quality of the imaging lens group, can also effectively correct the system chromatic aberration of the imaging lens group, improve distortion and coma, increase the resolution of the imaging lens group, and further improve the imaging quality of the imaging lens group, thereby improving the clarity of the projection pattern projected by the projection component.

[0078] In one embodiment, the high - illumination projection component 100 satisfies the following conditional formula: 0.667 < (CT4 + CT5) / (CT1 + CT2 + CT3) < 0.979; (CT4 + CT5) / (CT1 + CT2 + CT3) can be 0.668, 0.667, 0.894, or 0.979; reasonably distributing the central thickness of each lens is conducive to assembling the projection component, improving the assembly efficiency and yield.

[0079] In one embodiment, the high - illumination projection component 100 satisfies the following conditional formula: 11.727 < |f2 / CT2| < 24.605; |f2 / CT2| can be 14.016, 11.727, 24.605 or 23.055; reasonably controlling the ratio of the focal length of the second lens to the thickness of the second lens can effectively improve distortion and coma, improve the resolution of the imaging lens group, improve the imaging quality of the imaging lens group, and thus further improve the clarity of the projection pattern of the projection combination.

[0080] In one embodiment, the high - illumination projection component 100 satisfies the following conditional formula: 0.645 < |f23 / T23| < 1.673; |f23 / T23| can be 0.645, 1.233, 1.673 or 1.338; by reasonably controlling the combined focal length of the second lens and the third lens and the air gap between the second lens and the third lens, the light trend can be effectively controlled, avoiding the problem of excessive sensitivity of the lens caused by overly steep light rays. By adjusting the air gap between the first lens and the second lens on the optical axis, it is also conducive to controlling the field curvature, improving the imaging quality of the imaging lens group, and thus further improving the clarity of the projection pattern of the projection component.

[0081] In one embodiment, the high - illumination projection component 100 satisfies the following conditional formula: 13.231 < EPD / (DT11 - DT12) < 18.625; EPD / (DT11 - DT12) can be 14.131, 13.231, 16.715, or 18.625; controlling the ratio of the entrance pupil diameter of the imaging lens group to the sum of the effective radii of the image side and the object side of the first lens can effectively control the light angle on the conjugate surface of the imaging lens group, improve the relative illumination during imaging of the imaging lens group, and make the projection pattern edge clearly visible even when the external ambient light is strong for the projection component.

[0082] In one embodiment, the high-illuminance projection component 100 satisfies the following condition: 3.845 < (DT11 - DT22) / T12 < 9.852; (DT11 - DT22) / T12 can be 9.852, 4.171, 4.086, or 3.845. By reasonably controlling the effective radii of the image-side and object-side surfaces of the first lens, and simultaneously limiting the central air gap between the first and second lenses, it is beneficial to reduce the overall impact of ghost images generated by the first and second lenses on the imaging lens group, thereby improving the imaging quality of the imaging lens group. In addition, controlling the spacing between the first and second lenses makes the installation of the first and second lenses more convenient and improves assembly efficiency. Controlling the effective radii of the object-side and image-side surfaces of the first lens can improve the processing characteristics of the first lens and increase the efficiency and yield of processing the first lens.

[0083] In one embodiment, the high-illuminance projection component 100 satisfies the following condition: 1.093 < (R22-R21) / (R22+R21) < 2.332; (R22-R21) / (R22+R21) can be 2.332, 1.411, 1.320 or 1.093; constraining the curvature radii of the image side and object side of the second lens is beneficial for correcting spherical aberration when the imaging lenses form an image, improving the quality of the image formed by the imaging lenses, thereby improving the clarity of the projection pattern of the projection component.

[0084] In one embodiment, the high-illuminance projection component 100 satisfies the following condition: 1.534 < (SAG11-SAG12) / ET1 < 2.309; (SAG11-SAG12) / ET1 can be 1.534, 1.771, 1.734 or 2.309; the constraint 1.534 < (SAG11-SAG12) / ET1 < 2.309 is beneficial to improving the processing characteristics of the first lens and improving the efficiency and yield of processing the first lens.

[0085] See Figure 1 , Figure 33 ,as well as Figure 34 The illumination lens group 20 includes a fourth lens 21 and a fifth lens 22. The fifth lens 22 is located on the object side of the fourth lens 21. After passing through the fourth lens 21 and the fifth lens 22, the light becomes horizontal and exits onto the film 40; or the light is converged by the fourth lens 21 and the fifth lens 22 to exit onto the film 40 at a certain angle. A transparent pattern to be projected is formed on the image side of the film 40 through magnetron sputtering and photolithography. Depending on the length and width of the pattern to be projected, the size, shape, and angle of the pattern on the film 40 will vary. For details, please refer to [reference needed]. Figure 35 The positioning diagram of the projected pattern on the film.

[0086] In a second aspect, the present invention also provides a welcome light, including a high-illuminance projection component as described in any possible implementation of the first aspect above.

[0087] Installing the welcome light of this application at the car's foot pedal allows the tilted pattern on the film to be projected onto the ground directly, avoiding the situation where the projected pattern is blocked when people get out of the car. The LED in the welcome light of this application has a power of 3 watts.

[0088] The following will combine Figures 1 to 35 Some specific, but not limiting, examples of embodiments of this application are described in more detail.

[0089] Example 1

[0090] The features, principles, and other aspects of this application will be described in detail below. For ease of description, in the following embodiments, STO represents the surface of the aperture stop, S1 represents the image-side surface of the first lens 11, S2 represents the object-side surface of the first lens 11, S3 represents the image-side surface of the second lens 12, S4 represents the object-side surface of the second lens 12, S5 represents the image-side surface of the third lens 13, S6 represents the object-side surface of the third lens 13, S7 represents the image-side surface of the film 40, S8 represents the image-side surface of the fourth lens 21, S9 represents the object-side surface of the fourth lens 21, S10 represents the image-side surface of the fifth lens 22, and S11 represents the object-side surface of the fifth lens 22.

[0091] Please see Figure 1 , Figure 1 The dashed line is used to represent the optical axis. The high-illuminance projection component 100 in this embodiment includes an illumination lens group 20 for focusing the light from the light source, an imaging lens group 10 for adjusting the field of view of the light imaging, and a housing assembly 30; the imaging lens group 10 is mounted on the image side of the housing assembly 30, and the illumination lens group 20 is mounted on the object side of the housing assembly 30;

[0092] The imaging lens group 10 includes, sequentially from the image side to the object side:

[0093] A first lens with positive optical power has an image-side surface that is convex near the optical axis and an object-side surface that is convex near the optical axis.

[0094] The second lens with negative optical power has an image-side surface that is concave near the optical axis and an object-side surface that is concave near the optical axis.

[0095] A third lens with positive optical power has an image-side surface that is convex near the optical axis and an object-side surface that is concave near the optical axis.

[0096] The imaging lens group has three lenses with optical power, and the first lens, the second lens, and the third lens are all aspherical lenses.

[0097] The illumination lens group comprises, sequentially from the image side to the object side, the following:

[0098] The fourth lens with positive optical power has an image-side surface that is convex near the optical axis and an object-side surface that is flat.

[0099] The fifth lens with positive optical power has an image-side surface that is convex near the optical axis and an object-side surface that is flat.

[0100] Let TTL1 represent the total optical length of the imaging lens group 10, and TTL2 represent the total optical length of the illumination lens group 20; let Fov1 represent the maximum field of view of the imaging lens group 10, and Fov2 represent the maximum field of view of the illumination lens group 20; let EFL1 represent the effective focal length of the imaging lens group 10, and EFL2 represent the effective focal length of the illumination lens group 20; let F.No1 represent the aperture F-number of the imaging lens group 10, and F.No2 represent the aperture F-number of the illumination lens group 20. Let αi represent the i-th order aspherical coefficient, i = 4, 6, 8, 10, 12, and let K represent the conic coefficient. Based on the above relationships, Table 1 shows TTL1, TTL2, Fov1, Fov2, EFL1, EFL2, surface type, radius of curvature, thickness, material refractive index, and conic coefficient in Example 1, where the units of radius of curvature and thickness are millimeters (mm), as shown in Table 1:

[0101] Table 1

[0102]

[0103] Table 2 shows the aspheric coefficients of the high-illuminance projection component 100 of Embodiment 1 of this application, as shown in Table 2:

[0104] Face number A4 A6 A8 A10 A12 S1 2.884E-06 -2.664E-07 3.700E-08 -1.301E-09 1.055E-11 S2 7.061E-05 -2.030E-06 4.032E-08 4.357E-10 -7.752E-12 S3 -8.143E-05 5.105E-06 2.974E-08 -1.212E-09 7.127E-12 S4 9.270E-06 1.064E-05 1.913E-07 -8.351E-09 9.069E-11 S5 -3.617E-03 -5.650E-04 1.159E-04 -1.183E-05 1.222E-07 S6 -1.477E-03 -1.906E-03 2.152E-04 1.004E-05 -2.334E-06 S7 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S8 -8.970E-04 6.000E-06 1.000E-07 2.200E-09 -2.000E-12 S9 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S10 1.997E-03 9.056E-06 1.923E-06 9.196E-09 8.196E-10 S11 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00

[0105] Among them, the non-curved surfaces of each lens in the imaging lens group 10 satisfy:

[0106]

[0107] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / r (i.e., the paraxial curvature c is the reciprocal of the radius of curvature r in Table 1 above); k is the conic constant (given in Table 1 above); Ai is the in-th order correction coefficient of the aspherical surface, and the higher-order coefficients A4, A6, A8, A10, and A12 of each lens surface S1-S11 are shown in Table 2. It should be understood that the aspherical surfaces of each lens in the imaging lens group 10 can use the aspherical surface shown in the above aspherical surface formula, or other aspherical surface formulas can be used, and this application does not limit this.

[0108] The above provides design data for the imaging lens group 10 of Embodiment 1 of this application: effective focal length EFL1 = 26.114 mm, maximum field of view Fov1 = 10.997°, total optical length TTL1 = 29.975 mm, and aperture F-number F.No1 = 2.144; and design data for the illumination lens group 20: effective focal length EFL2 = 4.473 mm, maximum field of view Fov2 = 41.466°, total optical length TTL2 = 7.205 mm, and aperture F-number F.No2 = 37.592.

[0109] In one embodiment provided in this application, f123 / tan(Semi-Fov1) = 134.382.

[0110] In one embodiment provided in this application, f123 / f45 = 5.838.

[0111] In one embodiment provided in this application, f3 / f12 = 59.887.

[0112] In one embodiment provided in this application, (CT4+CT5) / (CT1+CT2+CT3)=0.668.

[0113] In one embodiment provided in this application, |f2 / CT2| = 14.016.

[0114] In one embodiment provided in this application, |f23 / T23| = 0.645.

[0115] In one embodiment provided in this application, EPD / (DT11-DT12) = 14.131.

[0116] In one embodiment provided in this application, (DT11-DT22) / T12 = 9.852.

[0117] In one embodiment provided in this application, (R22-R21) / (R22+R21)=2.332.

[0118] In one embodiment provided in this application, (SAG11-SAG12) / ET1 = 1.534.

[0119] See Figure 2 In Example 1, a light-transmitting pattern to be projected is formed on the image side of the film 40 by magnetron sputtering and photolithography. The image side of the film 40 is the object side S7 of the imaging lens group 10, and the pattern to be projected is tilted on the film. Figure 3 and Figure 4The performance of the high-illuminance projection component in Example 1 is described. The high-illuminance projection component in Example 1 can project a pattern with an illuminance of up to 18300 lx (lux), making the projected pattern clearly visible even in strong ambient light conditions such as during the day or outdoors. The projected pattern has a length × width of 142 mm × 120 mm, which improves the recognizability of the projected pattern. Figures 5 to 8 The optical performance of the imaging lens group 10 is described, ensuring the clarity of the pattern projected by the high-illuminance projection component.

[0120] Example 2

[0121] In Embodiment 2, STO represents the surface of the aperture, S1 represents the image-side surface of the first lens 11, S2 represents the object-side surface of the first lens 11, S3 represents the image-side surface of the second lens 12, S4 represents the object-side surface of the second lens 12, S5 represents the image-side surface of the third lens 13, S6 represents the object-side surface of the third lens 13, S7 represents the image-side surface of the film 40, S8 represents the image-side surface of the fourth lens 21, S9 represents the object-side surface of the fourth lens 21, S10 represents the image-side surface of the fifth lens 22, and S11 represents the object-side surface of the fifth lens 22.

[0122] Please see Figure 9 , Figure 9 The dashed line is used to represent the optical axis. The high-illuminance projection component 100 in this embodiment includes an illumination lens group 20 for focusing the light from the light source, an imaging lens group 10 for adjusting the field of view of the light imaging, and a housing assembly 30; the imaging lens group 10 is mounted on the image side of the housing assembly 30, and the illumination lens group 20 is mounted on the object side of the housing assembly 30;

[0123] The imaging lens group 10 includes, sequentially from the image side to the object side:

[0124] A first lens with positive optical power has an image-side surface that is convex near the optical axis and an object-side surface that is convex near the optical axis.

[0125] The second lens with negative optical power has an image-side surface that is concave near the optical axis and an object-side surface that is concave near the optical axis.

[0126] A third lens with positive optical power has an image-side surface that is convex near the optical axis and an object-side surface that is concave near the optical axis.

[0127] The imaging lens group has three lenses with optical power, and the first lens, the second lens, and the third lens are all aspherical lenses.

[0128] The illumination lens group comprises, sequentially from the image side to the object side, the following:

[0129] The fourth lens with positive optical power has an image-side surface that is convex near the optical axis and an object-side surface that is flat.

[0130] The fifth lens with positive optical power has an image-side surface that is convex near the optical axis and an object-side surface that is flat.

[0131] Let TTL1 represent the total optical length of the imaging lens group 10, and TTL2 represent the total optical length of the illumination lens group 20; let Fov1 represent the maximum field of view of the imaging lens group 10, and Fov2 represent the maximum field of view of the illumination lens group 20; let EFL1 represent the effective focal length of the imaging lens group 10, and EFL2 represent the effective focal length of the illumination lens group 20; let F.No1 represent the aperture F-number of the imaging lens group 10, and F.No2 represent the aperture F-number of the illumination lens group 20. Let αi represent the i-th order aspherical coefficient, i = 4, 6, 8, 10, 12, and let K represent the conic coefficient. Based on the above relationships, Table 3 shows TTL1, TTL2, Fov1, Fov2, EFL1, EFL2, surface type, radius of curvature, thickness, material refractive index, and conic coefficient in Example 2, where the units for radius of curvature and thickness are millimeters (mm), as shown in Table 3.

[0132] Table 3

[0133]

[0134] Table 4 shows the aspheric coefficients of the high-illuminance projection component 100 of Embodiment 2 of this application, as shown in Table 4:

[0135] Face number A4 A6 A8 A10 A12 S1 7.242E-06 -4.148E-07 2.429E-08 -9.732E-10 1.091E-11 S2 1.099E-04 -9.839E-07 4.387E-08 3.763E-10 -1.127E-11 S3 -1.341E-05 7.503E-06 2.749E-08 -2.680E-09 1.282E-11 S4 1.720E-04 5.602E-06 1.886E-07 -2.603E-09 -5.533E-11 S5 -3.194E-04 -2.819E-05 -2.785E-06 -1.542E-08 -1.046E-08 S6 -1.500E-03 -1.251E-04 -5.211E-06 -4.006E-07 -1.007E-08 S7 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S8 -8.970E-04 6.000E-06 1.000E-07 2.200E-09 -2.000E-12 S9 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S10 1.997E-03 9.056E-06 1.923E-06 9.196E-09 8.196E-10 S11 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00

[0136] Among them, the non-curved surfaces of each lens in the imaging lens group 10 satisfy:

[0137]

[0138] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / r (i.e., the paraxial curvature c is the reciprocal of the radius of curvature r in Table 3 above); k is the conic constant (given in Table 3 above); Ai is the in-th order correction coefficient of the aspherical surface, and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 of each lens surface S1-S11 are shown in Table 4.

[0139] It should be understood that the aspherical surfaces of each lens in the imaging lens group 10 can be the aspherical surfaces shown in the above aspherical formula, or other aspherical formulas can be used, and this application does not limit them.

[0140] The above provides design data for the imaging lens group 10 of Embodiment 2 of this application: effective focal length EFL1 = 25.775 mm; maximum field of view Fov1 = 11.999°; total optical length TTL1 = 29.972 mm; aperture F-number F.No1 = 2.064; and design data for the illumination lens group 20: effective focal length EFL2 = 4.473 mm; maximum field of view Fov2 = 41.466°; total optical length TTL2 = 7.205 mm; aperture F-number F.No2 = 37.592.

[0141] In one embodiment provided in this application, f123 / tan(Semi-Fov1) = 121.272.

[0142] In one embodiment provided in this application, f123 / f45 = 5.762.

[0143] In one embodiment provided in this application, f3 / f12 = 1.828.

[0144] In one embodiment provided in this application, (CT4+CT5) / (CT1+CT2+CT3)=0.667.

[0145] In one embodiment provided in this application, |f2 / CT2| = 11.727.

[0146] In one embodiment provided in this application, |f23 / T23|=1.233.

[0147] In one embodiment provided in this application, EPD / (DT11-DT12) = 13.231.

[0148] In one embodiment provided in this application, (DT11-DT22) / T12 = 4.171.

[0149] In one embodiment provided in this application, (R22-R21) / (R22+R21)=1.411.

[0150] In one embodiment provided in this application, (SAG11-SAG12) / ET1 = 1.771.

[0151] See Figure 10 In embodiment 2, a light-transmitting pattern to be projected is formed on the image side of the film 40 by magnetron sputtering and photolithography. The image side of the film 40 is the object side S7 of the imaging lens group 10, and the pattern to be projected is tilted on the film. Figure 11 and Figure 12The performance of the high-illuminance projection component in Embodiment 2 is described. The high-illuminance projection component in Embodiment 2 can project a pattern with an illuminance of up to 15600 lx (lux), making the projected pattern clearly visible even in strong ambient light conditions such as during the day or outdoors. The projected pattern has a length × width of 156 mm × 128 mm, which improves the recognizability of the projected pattern. Figures 13 to 16 The optical performance of the imaging lens group 10 is described, ensuring the clarity of the pattern projected by the high-illuminance projection component.

[0152] Example 3

[0153] In Embodiment 3, STO represents the surface of the aperture, S1 represents the image-side surface of the first lens 11, S2 represents the object-side surface of the first lens 11, S3 represents the image-side surface of the second lens 12, S4 represents the object-side surface of the second lens 12, S5 represents the image-side surface of the third lens 13, S6 represents the object-side surface of the third lens 13, S7 represents the image-side surface of the film 40, S8 represents the image-side surface of the fourth lens 21, S9 represents the object-side surface of the fourth lens 21, S10 represents the image-side surface of the fifth lens 22, and S11 represents the object-side surface of the fifth lens 22.

[0154] Please see Figure 17 , Figure 17 The dashed line is used to represent the optical axis. The high-illuminance projection component 100 in this embodiment includes an illumination lens group 20 for focusing the light from the light source, an imaging lens group 10 for adjusting the field of view of the light imaging, and a housing assembly 30; the imaging lens group 10 is mounted on the image side of the housing assembly 30, and the illumination lens group 20 is mounted on the object side of the housing assembly 30;

[0155] The imaging lens group 10 includes, sequentially from the image side to the object side:

[0156] A first lens with positive optical power has an image-side surface that is convex near the optical axis and an object-side surface that is convex near the optical axis.

[0157] The second lens with negative optical power has an image-side surface that is concave near the optical axis and an object-side surface that is concave near the optical axis.

[0158] A third lens with positive optical power has an image-side surface that is convex near the optical axis and an object-side surface that is concave near the optical axis.

[0159] The imaging lens group has three lenses with optical power, and the first lens, the second lens, and the third lens are all aspherical lenses.

[0160] The illumination lens group comprises, sequentially from the image side to the object side, the following:

[0161] The fourth lens with positive optical power has an image-side surface that is convex near the optical axis and an object-side surface that is flat.

[0162] The fifth lens with positive optical power has an image-side surface that is convex near the optical axis and an object-side surface that is flat.

[0163] Let TTL1 represent the total optical length of the imaging lens group 10, and TTL2 represent the total optical length of the illumination lens group 20; let Fov1 represent the maximum field of view of the imaging lens group 10, and Fov2 represent the maximum field of view of the illumination lens group 20; let EFL1 represent the effective focal length of the imaging lens group 10, and EFL2 represent the effective focal length of the illumination lens group 20; let F.No1 represent the aperture F-number of the imaging lens group 10, and F.No2 represent the aperture F-number of the illumination lens group 20. Let αi represent the i-th order aspherical coefficient, i = 4, 6, 8, 10, 12, and let K represent the conic coefficient. Based on the above relationships, Table 5 shows TTL1, TTL2, Fov1, Fov2, EFL1, EFL2, surface type, radius of curvature, thickness, material refractive index, and conic coefficient in Example 3, where the units for radius of curvature and thickness are millimeters (mm), as shown in Table 5:

[0164] Table 5

[0165]

[0166] Table 6 shows the aspheric coefficients of the high-illuminance projection component 100 of Embodiment 1 of this application, as shown in Table 6:

[0167]

[0168]

[0169] Among them, the non-curved surfaces of each lens in the imaging lens group 10 satisfy:

[0170]

[0171] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / r (i.e., the paraxial curvature c is the reciprocal of the radius of curvature r in Table 5 above); k is the conic constant (given in Table 5 above); Ai is the in-th order correction coefficient of the aspherical surface, and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 of each lens surface S1-S11 are shown in Table 6.

[0172] It should be understood that the aspherical surfaces of each lens in the imaging lens group 10 can be the aspherical surfaces shown in the above aspherical formula, or other aspherical formulas can be used, and this application does not limit them.

[0173] The above provides design data for the imaging lens group 10 of Embodiment 3 of this application: effective focal length EFL1 = 20.427 mm; maximum field of view Fov1 = 14.993°; total optical length TTL1 = 24.416 mm; aperture F-number F.No1 = 2.072; and design data for the illumination lens group 20: effective focal length EFL2 = 4.473 mm; maximum field of view Fov2 = 41.466°; total optical length TTL2 = 7.205 mm; aperture F-number F.No2 = 37.592.

[0174] In one embodiment provided in this application, f123 / tan(Semi-Fov1) = 76.272.

[0175] In one embodiment provided in this application, f123 / f45 = 4.567.

[0176] In one embodiment provided in this application, f3 / f12 = 1.510.

[0177] In one embodiment provided in this application, (CT4+CT5) / (CT1+CT2+CT3)=0.894.

[0178] In one embodiment provided in this application, |f2 / CT2| = 24.605.

[0179] In one embodiment provided in this application, |f23 / T23| = 1.673.

[0180] In one embodiment provided in this application, EPD / (DT11-DT12) = 16.715.

[0181] In one embodiment provided in this application, (DT11-DT22) / T12 = 4.086.

[0182] In one embodiment provided in this application, (R22-R21) / (R22+R21)=1.320.

[0183] In one embodiment provided in this application, (SAG11-SAG12) / ET1 = 1.734.

[0184] See Figure 18 A light-transmitting pattern to be projected is formed on the image side of the film 40 through magnetron sputtering and photolithography. The image side of the film 40 is the object side S7 of the imaging lens group 10, and the pattern to be projected is tilted on the film. Figure 19 and Figure 20 The performance of the high-illuminance projection component in Example 3 is described. The high-illuminance projection component in Example 3 can project a pattern with an illuminance of up to 10400 lx (lux), making the projected pattern clearly visible even in strong ambient light conditions such as during the day or outdoors. The projected pattern has a length × width of 194 mm × 160 mm, which improves the recognizability of the projected pattern. Figures 21 to 24 The optical performance of the imaging lens group 10 is described, ensuring the clarity of the pattern projected by the high-illuminance projection component.

[0185] Example 4

[0186] In Example 4, STO represents the surface of the aperture, S1 represents the image side of the first lens 11, S2 represents the object side of the first lens 11, S3 represents the image side of the second lens 12, S4 represents the object side of the second lens 12, S5 represents the image side of the third lens 13, S6 represents the object side of the third lens 13, S7 represents the image side of the film 40, S8 represents the image side of the fourth lens 21, S9 represents the object side of the fourth lens 21, S10 represents the image side of the fifth lens 22, and S11 represents the object side of the fifth lens 22.

[0187] Please see Figure 25 , Figure 25 The dashed line is used to represent the optical axis. The high-illuminance projection component 100 in this embodiment includes an illumination lens group 20 for focusing the light from the light source, an imaging lens group 10 for adjusting the field of view of the light imaging, and a housing assembly 30; the imaging lens group 10 is mounted on the image side of the housing assembly 30, and the illumination lens group 20 is mounted on the object side of the housing assembly 30;

[0188] The imaging lens group 10 includes, sequentially from the image side to the object side:

[0189] A first lens with positive optical power has an image-side surface that is convex near the optical axis and an object-side surface that is convex near the optical axis.

[0190] The second lens with negative optical power has an image-side surface that is concave near the optical axis and an object-side surface that is concave near the optical axis.

[0191] A third lens with positive optical power has an image-side surface that is convex near the optical axis and an object-side surface that is concave near the optical axis.

[0192] The imaging lens group has three lenses with optical power, and the first lens, the second lens, and the third lens are all aspherical lenses.

[0193] The illumination lens group comprises, sequentially from the image side to the object side, the following:

[0194] The fourth lens with positive optical power has an image-side surface that is convex near the optical axis and an object-side surface that is flat.

[0195] The fifth lens with positive optical power has an image-side surface that is convex near the optical axis and an object-side surface that is flat.

[0196] Let TTL1 represent the total optical length of the imaging lens group 10, and TTL2 represent the total optical length of the illumination lens group 20; let Fov1 represent the maximum field of view of the imaging lens group 10, and Fov2 represent the maximum field of view of the illumination lens group 20; let EFL1 represent the effective focal length of the imaging lens group 10, and EFL2 represent the effective focal length of the illumination lens group 20; let F.No1 represent the aperture F-number of the imaging lens group 10, and F.No2 represent the aperture F-number of the illumination lens group 20. Let αi represent the i-th order aspherical coefficient, i = 4, 6, 8, 10, 12, and let K represent the conic coefficient. Based on the above relationships, Table 7 shows TTL1, TTL2, Fov1, Fov2, EFL1, EFL2, surface type, radius of curvature, thickness, material refractive index, and conic coefficient in Example 4, where the units of radius of curvature and thickness are millimeters (mm), as shown in Table 7:

[0197] Table 7

[0198]

[0199] Table 8 shows the aspheric coefficients of the high-illuminance projection component 100 of Embodiment 4 of this application, as shown in Table 8:

[0200] Face number A4 A6 A8 A10 A12 S1 7.345E-06 -6.035E-07 1.923E-08 -7.057E-09 1.484E-10 S2 1.996E-04 2.586E-06 7.661E-08 -5.479E-09 7.341E-11 S3 1.409E-04 2.386E-05 1.518E-07 -3.056E-08 2.185E-10 S4 4.778E-04 1.187E-05 3.558E-07 3.856E-08 -3.131E-09 S5 -3.462E-04 2.723E-05 -3.783E-05 3.576E-06 -2.051E-07 S6 -2.114E-04 -4.559E-04 2.632E-05 -6.670E-06 3.057E-07 S7 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S8 -8.970E-04 6.000E-06 1.000E-07 2.200E-09 -2.000E-12 S9 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 S10 1.997E-03 9.056E-06 1.923E-06 9.196E-09 8.196E-10 S11 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00

[0201] Among them, the non-curved surfaces of each lens in the imaging lens group 10 satisfy:

[0202]

[0203] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / r (i.e., the paraxial curvature c is the reciprocal of the radius of curvature r in Table 7 above); k is the conic constant (given in Table 7 above); Ai is the in-th order correction coefficient of the aspherical surface, and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 of each lens surface S1-S11 are shown in Table 8.

[0204] It should be understood that the aspherical surfaces of each lens in the imaging lens group 10 can be the aspherical surfaces shown in the above aspherical formula, or other aspherical formulas can be used, and this application does not limit them.

[0205] The above provides design data for the imaging lens group 10 of Embodiment 4 of this application: effective focal length EFL1 = 17.581 mm; maximum field of view Fov1 = 17.998°; total optical length TTL1 = 21.533 mm; aperture F-number F.No1 = 2.077; and design data for the illumination lens group 20: effective focal length EFL2 = 4.473 mm; maximum field of view Fov2 = 41.466°; total optical length TTL2 = 7.205 mm; aperture F-number F.No2 = 37.592.

[0206] In one embodiment provided in this application, f123 / tan(Semi-Fov1) = 54.115.

[0207] In one embodiment provided in this application, f123 / f45 = 3.930.

[0208] In one embodiment provided in this application, f3 / f12 = 1.792.

[0209] In one embodiment provided in this application, (CT4+CT5) / (CT1+CT2+CT3)=0.979.

[0210] In one embodiment provided in this application, |f2 / CT2| = 23.055.

[0211] In one embodiment provided in this application, |f23 / T23| = 1.338.

[0212] In one embodiment provided in this application, EPD / (DT11-DT12) = 18.625.

[0213] In one embodiment provided in this application, (DT11-DT22) / T12 = 3.845.

[0214] In one embodiment provided in this application, (R22-R21) / (R22+R21)=1.093.

[0215] In one embodiment provided in this application, (SAG11-SAG12) / ET1 = 2.309.

[0216] See Figure 26 In embodiment 4, a light-transmitting pattern to be projected is formed on the image side of the film 40 by magnetron sputtering and photolithography. The image side of the film 40 is the object side S7 of the imaging lens group 10, and the pattern to be projected is tilted on the film. Figure 27 and Figure 28The performance of the high-illuminance projection component in Example 4 is described. The high-illuminance projection component in Example 4 can project a pattern with an illuminance of up to 7580 lx (lux), making the projected pattern clearly visible even in strong ambient light conditions such as during the day or outdoors. The projected pattern has a length × width of 235 mm × 190 mm, which improves the recognizability of the projected pattern. Figures 29 to 32 The optical performance of the imaging lens group 10 is described, ensuring the clarity of the pattern projected by the high-illuminance projection component.

[0217] The data from each embodiment is summarized below:

[0218] formula Example 1 Example 2 Example 3 Example 4 f123 / tan(Semi-Fov) 134.382 121.272 76.272 54.115 f123 / f45 5.838 5.762 4.567 3.930 f3 / f12 59.887 1.828 1.510 1.792 (CT4+CT5) / (CT1+CT2+CT3) 0.668 0.667 0.894 0.979 |f2 / CT2| 14.016 11.727 24.605 23.055 |f23 / T23| 0.645 1.233 1.673 1.338 EPD / (DT11-DT12) 14.131 13.231 16.715 18.625 (DT11-DT22) / T12 9.852 4.171 4.086 3.845 (R22-R21) / (R22+R21) 2.332 1.411 1.320 1.093 (SAG11-SAG12) / ET1 1.534 1.771 1.734 2.309

[0219] It should be noted that the pattern projected in the high-illuminance projection component provided by the present invention is only exemplary. The projected pattern can be changed as needed and can be logos of various car brands, traffic signs, text, numbers, letters, etc.

[0220] This invention has been described by way of preferred embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. The invention is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims are also within the protection scope of the invention.

Claims

1. A high-illuminance projection assembly, comprising an illumination lens group for focusing light rays from a light source, an imaging lens group for adjusting an imaging field angle of the light rays, and a housing assembly; the imaging lens group is mounted at an image-side end of the housing assembly, and the illumination lens group is mounted at an object-side end of the housing assembly; characterized in that, the imaging lens group comprises, in order from the image side to the object side: a first lens with positive refractive power, whose image-side surface is convex near the optical axis; a second lens with negative refractive power, whose image-side surface is concave near the optical axis; a third lens with positive refractive power, whose object-side surface is convex near the optical axis; the imaging lens group has three lenses with refractive power; the illumination lens group comprises, in order from the image side to the object side: a fourth lens with positive refractive power; a fifth lens with positive refractive power; the imaging lens group satisfies the following conditional expressions: 54.115 mm < f123 / tan(Semi-Fov1) < 134.382 mm; 3.930 < f123 / f45 < 5.838; wherein f123 is the combined focal length of the first lens, the second lens, and the third lens; Semi-Fov1 is half of the maximum field angle of the imaging lens group, f123 is the combined focal length of the first lens, the second lens, and the third lens; and f45 is the combined focal length of the fourth lens and the fifth lens. the imaging lens group satisfies the following conditional expressions:

2. The high-illuminance projection assembly of claim 1, wherein, 1.510 < f3 / f12 < 59.887 wherein f3 is the effective focal length of the third lens, and f12 is the combined focal length of the first lens and the second lens. the projection assembly satisfies the following conditional expressions:

3. The high-illuminance projection assembly of claim 1 or 2, wherein, 0.667 < (CT4+CT5) / (CT1+CT2+CT3) < 0.979; wherein CT1 is the central thickness of the first lens on the optical axis, CT2 is the central thickness of the second lens on the optical axis, and CT3 is the central thickness of the third lens on the optical axis; CT4 is the central thickness of the fourth lens on the optical axis, and CT5 is the central thickness of the fifth lens on the optical axis. the imaging lens group satisfies the following conditional expressions:

4. The high-illuminance projection assembly of claim 3, wherein, 11.727 < |f2 / CT2| < 24.605; wherein f2 is the effective focal length of the second lens, and CT2 is the central thickness of the second lens on the optical axis. the imaging lens group satisfies the following conditional expressions:

5. The high-illuminance projection assembly of claim 4, wherein, 0.645 < |f23 / T23| < 1.673; wherein f23 is the combined focal length of the second lens and the third lens, and T23 is the air separation distance of the second lens and the third lens on the optical axis. the projection assembly satisfies the following conditional expressions:

6. The high-illuminance projection assembly of claim 4 or 5, wherein, 13.231 < EPD / (DT11-DT12) < 18.625; wherein EPD is the entrance pupil diameter of the imaging lens group; DT11 is the maximum effective radius of the image-side surface of the first lens; and DT12 is the maximum effective radius of the object-side surface of the first lens. the imaging lens group satisfies the following conditional expressions:

7. The high-illuminance projection assembly of claim 6, wherein, 3.845 < (DT11-DT22) / T12 < 9.852; ​ wherein DT11 is the maximum effective radius of the image side surface of the first lens; DT22 is the maximum effective radius of the object side surface of the second lens; and T12 is the air separation distance of the first lens and the second lens on the optical axis.

8. The high-illuminance projection assembly of any of claims 1 to 7, wherein, The imaging lens group satisfies the following conditional expression: 1.093 < (R22-R21) / (R22+R21) < 2.332; wherein R21 is the curvature radius of the image side surface of the second lens; and R22 is the curvature radius of the object side surface of the second lens.

9. The high-illuminance projection assembly of claim 8, wherein, The imaging lens group satisfies the following conditional expression: 1.534 < (SAG11-SAG12) / ET1 < 2.309 SAG11 is the distance from the intersection of the image side surface of the first lens and the optical axis to the effective radius vertex on the optical axis of the image side surface of the first lens; SAG12 is the distance from the intersection of the object side surface of the first lens and the optical axis to the effective radius vertex on the optical axis of the object side surface of the first lens; and ET1 is the edge thickness of the first lens.

10. A welcome light, characterized in that A high-illumination projection assembly comprising the imaging lens group of any one of claims 1 to 9.

Images