Lighting projection assembly and welcome light

Abstract

The application discloses an illumination projection assembly, which comprises an illumination lens group, an imaging lens group and a housing assembly; the imaging lens group comprises, in sequence from an image side to an object side, a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power, a fourth lens with negative optical power and a fifth lens with positive optical power; the imaging lens group satisfies the following conditional expressions: 1.5 < f / EPD < 2.0, which is beneficial to realizing the characteristics of a large aperture and a large aperture, increasing the light transmittance and improving the imaging quality; and 6.4 < (TTL1 / f) / Tan(Semi-Fov) < 9.4, which is beneficial to meeting the requirements of a large image surface and a large field of view of the imaging lens group and controlling the length of the imaging lens group in a smaller range.

Description

Technical Field

[0001] This invention relates to the field of optical imaging technology, and more particularly to an illumination 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, existing in-vehicle projection products still have many shortcomings, such as too small an aperture, too small a field of view, and insufficient image clarity. Therefore, it is necessary to design a projection lamp to solve these problems. 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 lighting projection component and a welcome light with a large aperture, a large field of view, and a clear projection pattern.

[0005] In a first aspect, an illumination 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 and the illumination lens group are sequentially mounted within the housing assembly from the object side to the image side; the imaging lens group comprises, in sequence from the image side to the object side: The first lens with negative optical power has an image-side surface that is concave near the optical axis. The second lens with positive optical power has an image-side surface that is convex near the optical axis. The third lens with positive optical power has a convex image-side surface near the optical axis; The fourth lens with negative optical power has a convex image-side surface near the optical axis; The fifth lens with positive optical power has a convex image-side surface near the optical axis; The imaging lens group has five lenses; The imaging lens group satisfies the following condition: 1.5 <f / EPD<2.0; 6.4<(TTL1 / f) / Tan(Semi-Fov)<9.4; Where f is the total effective focal length of the imaging lens group, EPD is the entrance pupil diameter of the imaging lens group, TTL1 is the distance on the optical axis from the image side of the first lens of the imaging lens group to the object side of the imaging lens group, and Semi-Fov is half of the maximum field of view of the imaging lens group.

[0006] In one embodiment, the imaging lens group satisfies the following condition: -6.1 < (f5 - f4) / f < 12.7; 1.45 <f2 / f<3.45; Wherein, f5 is the effective focal length of the fifth lens, f4 is the effective focal length of the fourth lens, f is the total effective focal length of the imaging lens group, and f2 is the effective focal length of the second lens.

[0007] In one embodiment, the imaging lens group satisfies the following condition: 1.36 <R11 / f1<17.35; Wherein, R11 is the radius of curvature of the image side of the first lens, and f1 is the effective focal length of the first lens.

[0008] In one embodiment, the imaging lens group satisfies the following condition: 1.4 <f2 / (T23-T12)<20.5; Where f2 is the effective focal length of the second lens, T23 is the air gap between the second and third lenses on the optical axis, and T12 is the air gap between the first and second lenses on the optical axis.

[0009] In one embodiment, the imaging lens group satisfies the following condition: 0.24 < (R41 + R52) / f45 < 14.92; Wherein, R41 is the radius of curvature of the image side of the fourth lens, R52 is the radius of curvature of the object side of the fifth lens, and f45 is the combined focal length of the fourth and fifth lenses.

[0010] In one embodiment, the imaging lens group satisfies the following condition: 1.5<(T23+T34) / (CT2+CT3)<2.85; Wherein, T23 is the air gap between the second lens and the third lens on the optical axis; T34 is the air gap between the third lens and the fourth lens on the optical axis; CT2 is the center thickness of the second lens on the optical axis; and CT3 is the center thickness of the third lens on the optical axis.

[0011] In one embodiment, the imaging lens group satisfies the following condition: 1.6 <f45 / (DT41+DT52)<3.7; Wherein, f45 is the combined focal length of the fourth lens and the fifth lens; DT41 is the maximum effective half-aperture of the image side of the fourth lens; and DT52 is the maximum effective half-aperture of the object side of the fifth lens.

[0012] In one embodiment, the imaging lens group satisfies the following conditional formula: -16 < R22 / SAG22 + R32 / SAG32 < 149.5; where, R22 is the radius of curvature of the object side surface of the second lens, R32 is the radius of curvature of the object side surface of the third lens, SAG22 is the distance on the optical axis from the intersection of the object side surface of the second lens and the optical axis to the vertex of the effective radius of the object side surface of the second lens; SAG32 is the distance on the optical axis from the intersection of the object side surface of the third lens and the optical axis to the vertex of the effective radius of the object side surface of the third lens.

[0013] In one embodiment, the illumination lens group includes a sixth lens and a seventh lens; The sixth lens and the seventh lens are sequentially installed in the housing assembly from the image side to the object side, and the seventh lens is located on the object side of the sixth lens.

[0014] In a second aspect, a welcome light is provided, including the illumination projection component in any possible implementation manner of the first aspect. The illumination 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 assembly; the housing assembly includes an imaging lens barrel, an illumination lens barrel, and an end cap. One end of the imaging lens barrel is threadedly connected to the end cap, and the other end of the imaging lens barrel is threadedly connected to the illumination lens barrel. The first lens, the second lens, and the third lens are sequentially installed in the imaging lens barrel from the image side to the object side; a first spacer is provided between the second lens and the third lens; a second spacer is provided between the third lens 1 and the fourth lens; the film is disposed between the imaging lens group and the illumination lens group and is fixed in the illumination lens barrel by dispensing glue. The sixth lens and the seventh lens are sequentially installed in the illumination lens barrel from the image side to the object side.

[0015] The beneficial effects of the present invention are as follows: Constraint 1 < f / EPD < 3, which restricts the ratio of the focal length of the imaging lens group to the entrance pupil diameter to be greater than 1, is beneficial to realizing the characteristics of a large aperture and a large diameter, and at the same time can allow more light to enter the imaging lens group, increasing the light transmission amount and improving the imaging quality; restricting the ratio of the focal length of the imaging lens group to the entrance pupil diameter to be less than 3 makes the entrance pupil diameter of the imaging lens group not too large, which is beneficial to controlling the size of the imaging lens group in the vertical direction within a small range; Satisfying 6.4 < (TTL1 / f) / Tan(Semi-Fov) < 9.4, restricting the value of Tan(Semi-Fov) within a reasonable range is beneficial for the imaging lens group to meet the requirements of a large image plane and a large field angle, and restricting the ratio of the overall optical length of the imaging lens group to the focal length within a reasonable range is beneficial to controlling the length of the imaging lens group within a small range. Description of the Drawings

[0016] Figure 1 This is a schematic structural diagram of the imaging lens group of Embodiment 1 of this application; Figure 2 and Figure 3 These are, respectively, measurement drawings of the projection pattern in the length and width directions of Embodiment 1 of this application; Figures 4 to 7 The images shown in the order below are the spherical aberration curve, astigmatism curve, distortion diagram, and magnification chromatic aberration diagram of the imaging lens group of Embodiment 1 of this application. Figure 8 This is a schematic structural diagram of the imaging lens group of Embodiment 2 of this application; Figure 9 and Figure 10 These are, respectively, measurement drawings of the projection pattern in the length and width directions of Embodiment 2 of this application; Figures 11 to 14 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. Figure 15 This is a schematic structural diagram of the imaging lens group of Embodiment 3 of this application; Figure 16 and Figure 17 These are, respectively, measurement drawings of the projection pattern in the length and width directions of Embodiment 3 of this application; Figures 18 to 21 The images shown in sequence are the spherical aberration curve, astigmatism curve, distortion diagram, and magnification chromatic aberration diagram of the imaging lens group of Embodiment 3 of this application; Figure 22 This is a schematic structural diagram of the imaging lens group of Embodiment 4 of this application; Figure 23 and Figure 24 These are, respectively, measurement drawings of the projection pattern in the length and width directions of Embodiment 4 of this application; Figures 25 to 28 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. Figure 29 This is a schematic structural diagram of the lighting projection component of this application; Figure 30 This is a schematic structural diagram of the housing in the lighting projection assembly of this application; Figure 31 This is a positioning diagram of the pattern on the film in the lighting projection component of this application.

[0017] In the figure: 100, Illumination projection assembly; 10, Imaging lens group; 11, First lens; 12, Second lens; 13, Third lens; 14, Fourth lens; 15, Fifth lens; 20, Illumination lens group; 21, Sixth lens; 22, Seventh lens; 30, Housing assembly; 31, Imaging lens tube; 32, Illumination lens tube; 33, End cap; 40, Film; 50, First spacer; 60, Second spacer. Detailed Implementation

[0018] 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.

[0019] For ease of understanding, the technical terms used in this application will be explained and described below.

[0020] 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 image 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.

[0021] 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).

[0022] 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 image 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 object side, it is equivalent to the optical surface being concave to the image side, and the radius of curvature of the optical surface is negative.

[0023] 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.

[0024] See Figure 1 , Figure 29 ,as well as Figure 30 , Figure 1The center dot-dash line is used to represent the optical axis.

[0025] A lighting projection assembly 100 in this embodiment includes a lighting lens group 20 for focusing the light of a light source, an imaging lens group 10 for adjusting the imaging field angle of the light, and a housing assembly 30; the imaging lens group 10 and the lighting lens group 20 are sequentially installed in the housing assembly 30 from the image side to the object side; the imaging lens group 10 sequentially includes along the image side to the object side: a first lens 11 with a negative optical power, whose image side is concave near the optical axis; a second lens 12 with a positive optical power, whose image side is convex near the optical axis; a third lens 13 with a positive optical power, whose image side is convex near the optical axis; a fourth lens 14 with a negative optical power, whose image side is convex near the optical axis; a fifth lens 15 with a positive optical power, whose image side is convex near the optical axis; the number of lenses in the imaging lens group 10 is five; The imaging lens group 10 satisfies the following conditional expressions: 1.5 < f / EPD < 2.0; 6.4 < (TTL1 / f) / Tan(Semi-Fov) < 9.4. A film 40 is provided between the imaging lens group 10 and the lighting lens group 20, and a projection pattern is provided on the film 40. The film 40 is fixed in the housing assembly 30 by dispensing glue.

[0026] In this embodiment, the lighting projection assembly 100 satisfies the following conditional expressions: 1.5 < f / EPD < 2.0; f / EPD can be 2.0, 1.9, 1.5, or 1.999; the constraint 1.5 < f / EPD < 2.0 is beneficial to achieving the characteristics of a large aperture and large diameter, while increasing the light transmission and improving the imaging quality; In this embodiment, the lighting projection assembly 100 also satisfies the following conditional expressions: 6.4 < (TTL1 / f) / Tan(Semi-Fov) < 9.4; (TTL1 / f) / Tan(Semi-Fov) can be 6.489, 6.740, 9.464, or 8.335; the constraint 6.4 < (TTL1 / f) / Tan(Semi-Fov) < 9.4 is beneficial for the imaging assembly to meet the requirements of a large image plane and a large field angle, while controlling the length of the imaging assembly within a smaller range.

[0027] In one of the embodiments, the lighting projection assembly 100 satisfies the following conditional expressions: -6.1 < (f5 - f4) / f < 12.7; (f5 - f4) / f can be 12.710, -6.146, 11.994, or -6.075; when -6.1 < (f5 - f4) / f < 12.7, by reasonably configuring the focal lengths of the fourth lens and the fifth lens, the incident angles of the chief rays of each field during the imaging of the imaging assembly can be reasonably controlled to meet the requirements of the incident angles of the imaging assembly.

[0028] In one embodiment, the illumination projection assembly 100 satisfies the following conditional formula: 1.45 < f2 / f < 3.45; f2 / f can be 3.458, 1.806, 2.356, or 1.450; the constraint 1.45 < f2 / f < 3.45; is conducive to controlling the contribution rate of spherical aberration of the second lens within a reasonable range, conducive to balancing the high-order spherical aberration, reducing the sensitivity of the imaging assembly during imaging, and enabling the imaging assembly to obtain good imaging quality in the on-axis field of view.

[0029] In one embodiment, the illumination projection assembly 100 satisfies the following conditional formula: 1.36 < R11 / f1 < 17.35; R11 / f1 can be 17.348, 2.024, 1.362, or 1.383; the constraint 1.36 < R11 / f1 < 17.35; is conducive to controlling the optical effective aperture and surface shape of the first lens, thereby improving the forming stability of the first lens, ensuring the processability of the first lens, and reducing the sensitivity of the imaging assembly during imaging; in addition, it can also control the contribution rate of spherical aberration of the first lens within a certain extent, control the spherical aberration of the first lens within a reasonable range, and further improve the imaging quality of the imaging assembly.

[0030] In one embodiment, the illumination projection assembly 100 satisfies the following conditional formula: 1.4 < f2 / (T23 - T12) < 20.5; f2 / (T23 - T12) can be 20.487, 1.901, 1.781, or 1.413; the constraint 1.4 < f2 / (T23 - T12) < 20.5; is conducive to improving axial aberrations such as spherical aberration and chromatic aberration of the imaging assembly during imaging, and is conducive to improving the axial imaging quality of the imaging assembly during imaging.

[0031] In one embodiment, the illumination projection assembly 100 satisfies the following conditional formula: 0.24 < (R41 + R52) / f45 < 14.92; (R41 + R52) / f45 can be 3.402, 0.243, 14.918, or 1.543; the constraint 0.24 < (R41 + R52) / f45 < 14.92; is conducive to controlling the shapes of the fourth lens and the fifth lens, thereby improving the forming stability of the fourth lens and the fifth lens.

[0032] In one embodiment, the illumination projection component 100 satisfies the following conditional formula: 1.5 < (T23 + T34) / (CT2 + CT3) < 2.85; (T23 + T34) / (CT2 + CT3) can be 2.040, 2.137, 2.849, or 1.50; the constraint 1.5 < (T23 + T34) / (CT2 + CT3) < 2.85; reasonably controlling the central thicknesses of the second lens and the third lens and the distance therebetween is conducive to better correcting the spherical aberration and distortion during the imaging of the imaging component, reducing the sensitivity during the imaging of the imaging component, and improving the stability of the high imaging quality of the imaging component; in addition, it also keeps the distance between the second lens and the third lens within a reasonable range, which is conducive to improving the efficiency and stability during the assembly of the second lens and the third lens, and at the same time keeping the length of the imaging component within a smaller range.

[0033] In one embodiment, the illumination projection component 100 satisfies the following conditional formula: 1.6 < f45 / (DT41 + DT52) < 3.7; f45 / (DT41 + DT52) can be 1.631, 1.872, 1.944, or 3.707; the constraint 1.6 < f45 / (DT41 + DT52) < 3.7 enables the imaging component to obtain reasonable vignetting, improves the off-axis aberration of the lens outer aperture band, and further enhances the imaging quality.

[0034] In one embodiment, the illumination projection component 100 satisfies the following conditional formula: -16 < R22 / SAG22 + R32 / SAG32 < 149.5; R22 / SAG22 + R32 / SAG32 can be 52.951, 52.362, 149.477, or -15.953; the constraint -16 < R22 / SAG22 + R32 / SAG32 < 149.5 is conducive to correcting the field curvature and astigmatism during the imaging of the imaging component, and is conducive to improving the imaging quality of the peripheral field of view of the imaging component; reasonably controlling the sagittal height and surface shape of the second lens and the third lens is conducive to ensuring the processability of the second lens and the third lens and reducing the sensitivity during the imaging of the imaging component; in addition, it can also control the spherical aberration contribution rate of the second lens and the third lens to a certain extent, keep the spherical aberration of the second lens and the third lens within a reasonable range, and further improve the imaging quality of the imaging component.

[0035] Refer to Figure 1 、 Figure 29 、and Figure 30The illumination lens group 20 includes a sixth lens 21 and a seventh lens 22. The seventh lens 22 is located on the object side of the sixth lens 21. After passing through the sixth lens 21 and the seventh lens 22, the light rays become horizontal and exit onto the film 40; or the light rays are converged by the sixth lens 21 and the seventh 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 31 The positioning diagram of the projected pattern on the film.

[0036] In a second aspect, the present invention also provides a welcome light, including the lighting projection component in any possible implementation of the first aspect described above.

[0037] Installing the welcome light of this application at the car's foot pedal or rearview mirror 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.

[0038] The following will combine Figures 1 to 31 Some specific, but not limiting, examples of embodiments of this application are described in more detail.

[0039] Example 1

[0040] 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 fourth lens 14, S8 represents the object-side surface of the fourth lens 14, S9 represents the object-side surface of the fifth lens 15, the fourth lens 14 and the fifth lens 15 are cemented together, S10 represents the image-side surface of the film 40, S11 represents the image-side surface of the sixth lens 21, S12 represents the object-side surface of the sixth lens 21, S13 represents the image-side surface of the seventh lens 22, and S14 represents the object-side surface of the seventh lens 22.

[0041] Please see Figure 1 , Figure 1 The dotted line is used to represent the optical axis. The illumination projection assembly 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. The imaging lens group 10 includes, sequentially from the image side to the object side: The first 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. The second 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. 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 convex near the optical axis. The fourth lens with negative optical power has a convex image-side surface near the optical axis; 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 convex near the optical axis. The imaging lens group has five lenses with optical power, and the first lens, the second lens, the third lens, the fourth lens, and the fifth lens are all aspherical lenses.

[0042] The illumination lens group comprises, sequentially from the image side to the object side, the following: The sixth 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. The seventh 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. 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 Fov represent the maximum field of view of the imaging lens group 10, and let EFL2 represent the maximum field of view of the illumination lens group 20; let f represent the effective focal length of the imaging lens group 10, and let EFL2 represent the effective focal length of the illumination lens group 20; let F.No1 represent the aperture F-value of the imaging lens group 10, and let F.No2 represent the aperture F-value 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, Fov, f, EFL2, surface type, radius of curvature, thickness, material refractive index, dispersion coefficient, and conic coefficient in Example 1, where the units of radius of curvature and thickness are millimeters (mm), as shown in Table 1: Table 1 Table 2 shows the aspheric coefficients of the lighting projection component 100 of Embodiment 1 of this application, as shown in Table 2: Table 2 Among them, the non-curved surfaces of each lens in the imaging lens group 10 satisfy: 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 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-S9 are shown in Table 2.

[0043] 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.

[0044] The above provides design data for the imaging lens group 10 of Embodiment 1 of this application: effective focal length f = 3.04 mm; maximum field of view Fov = 89.981°; total optical length TTL1 = 19.717 mm; aperture F-number F.No1 = 2.0; and design data for the illumination lens group 20: effective focal length EFL2 = 3.269 mm; total optical length TTL2 = 7.171 mm; aperture F-number F.No2 = 3.508.

[0045] In one embodiment provided in this application, f / EPD=2.0.

[0046] In one embodiment provided in this application, (TTL1 / f) / Tan(Semi-Fov)=6.489.

[0047] In one embodiment provided in this application, (f5-f4) / f=12.710.

[0048] In one embodiment provided in this application, f2 / f = 3.458.

[0049] In one embodiment provided in this application, R11 / f1 = 17.348.

[0050] In one embodiment provided in this application, f2 / (T23-T12)=20.487.

[0051] In one embodiment provided in this application, (R41+R52) / f45=3.402.

[0052] In one embodiment provided in this application, (T23+T34) / (CT2+CT3)=2.040.

[0053] In one embodiment provided in this application, f45 / (DT41+DT52)=1.631.

[0054] In one embodiment provided in this application, R22 / SAG22+R32 / SAG32=52.951.

[0055] See Figure 1 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 S10 of the imaging lens group 10, and the pattern to be projected is tilted on the film. Figure 2 and Figure 3 The performance of the projection pattern of the lighting projection component in Embodiment 1 is described. The lighting projection component in Embodiment 1 projects a pattern with a length × width of 2875mm × 550mm, which improves the recognizability of the projected pattern. Figures 4 to 7 The optical performance of the imaging lens group 10 is described, ensuring the clarity of the pattern projected by the illumination projection assembly.

[0056] Example 2

[0057] 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 fourth lens 14, S8 represents the object-side surface of the fourth lens 14, S9 represents the object-side surface of the fifth lens 15, the fourth lens 14 and the fifth lens 15 are cemented together, S10 represents the image-side surface of the film 40, S11 represents the image-side surface of the sixth lens 21, S12 represents the object-side surface of the sixth lens 21, S13 represents the image-side surface of the seventh lens 22, and S14 represents the object-side surface of the seventh lens 22.

[0058] Please see Figure 8 , Figure 8 The dotted line is used to represent the optical axis. The illumination projection assembly 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. The imaging lens group 10 includes, sequentially from the image side to the object side: The first 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. The second 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. 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 convex near the optical axis. The fourth lens with negative optical power has a convex image-side surface near the optical axis; 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 convex near the optical axis. The imaging lens group has five lenses with optical power, and the first lens, the second lens, the third lens, the fourth lens, and the fifth lens are all aspherical lenses.

[0059] The illumination lens group comprises, sequentially from the image side to the object side, the following: The sixth 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. The seventh 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. 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 Fov represent the maximum field of view of the imaging lens group 10, and let EFL2 represent the maximum field of view of the illumination lens group 20; let f represent the effective focal length of the imaging lens group 10, and let EFL2 represent the effective focal length of the illumination lens group 20; let F.No1 represent the aperture F-value of the imaging lens group 10, and let F.No2 represent the aperture F-value 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, Fov, f, EFL2, surface type, radius of curvature, thickness, material refractive index, dispersion coefficient, and conic coefficient in Example 2, where the units of radius of curvature and thickness are millimeters (mm), as shown in Table 3: Table 3 Table 4 shows the aspherical coefficients of the lighting projection component 100 in Embodiment 2 of this application, as shown in Table 4: Table 4 Among them, the non-curved surfaces of each lens in the imaging lens group 10 satisfy: 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-S9 are shown in Table 4.

[0060] 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.

[0061] The above provides design data for the imaging lens group 10 of Embodiment 2 of this application: effective focal length f = 3.521 mm; maximum field of view Fov = 80.066°; total optical length TTL1 = 19.937 mm; aperture F-number F.No1 = 1.899; and design data for the illumination lens group 20: effective focal length EFL2 = 3.269 mm; total optical length TTL2 = 7.171 mm; aperture F-number F.No2 = 3.508.

[0062] In one embodiment provided in this application, f / EPD=1.9.

[0063] In one embodiment provided in this application, (TTL1 / f) / Tan(Semi-Fov)=6.740.

[0064] In one embodiment provided in this application, (f5-f4) / f=-6.146.

[0065] In one embodiment provided in this application, f2 / f = 1.806.

[0066] In one embodiment provided in this application, R11 / f1 = 2.024.

[0067] In one embodiment provided in this application, f2 / (T23-T12)=1.901.

[0068] In one embodiment provided in this application, (R41+R52) / f45=0.243.

[0069] In one embodiment provided in this application, (T23+T34) / (CT2+CT3)=2.137.

[0070] In one embodiment provided in this application, f45 / (DT41+DT52)=1.872.

[0071] In one embodiment provided in this application, R22 / SAG22+R32 / SAG32=52.362.

[0072] See Figure 8 In Example 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 S10 of the imaging lens group 10, and the pattern to be projected is tilted on the film. Figure 9 and Figure 10The performance of the projection pattern of the illumination projection component in Embodiment 2 is described. The illumination projection component in Embodiment 2 projects a pattern with a length × width of 2030mm × 416mm, which improves the recognizability of the projected pattern. Figures 11 to 14 The optical performance of the imaging lens group 10 is described, ensuring the clarity of the pattern projected by the illumination projection assembly.

[0073] Example 3

[0074] 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 fourth lens 14, S8 represents the object-side surface of the fourth lens 14, S9 represents the object-side surface of the fifth lens 15, the fourth lens 14 and the fifth lens 15 are cemented together, S10 represents the image-side surface of the film 40, S11 represents the image-side surface of the sixth lens 21, S12 represents the object-side surface of the sixth lens 21, S13 represents the image-side surface of the seventh lens 22, and S14 represents the object-side surface of the seventh lens 22.

[0075] Please see Figure 15 , Figure 15 The dotted line is used to represent the optical axis. The illumination projection assembly 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. The imaging lens group 10 includes, sequentially from the image side to the object side: The first 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. The second 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. 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 convex near the optical axis. The fourth lens with negative optical power has a convex image-side surface near the optical axis; 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 convex near the optical axis. The imaging lens group has five lenses with optical power, and the first lens, the second lens, the third lens, the fourth lens, and the fifth lens are all aspherical lenses.

[0076] The illumination lens group comprises, sequentially from the image side to the object side, the following: The sixth 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. The seventh 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. 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 Fov represent the maximum field of view of the imaging lens group 10, and let f represent the maximum field of view of the illumination lens group 20; let f represent the effective focal length of the imaging lens group 10, and let EFL2 represent the effective focal length of the illumination lens group 20; let F.No1 represent the aperture F-value of the imaging lens group 10, and let F.No2 represent the aperture F-value 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, Fov, f, EFL2, surface type, radius of curvature, thickness, material refractive index, dispersion coefficient, and conic coefficient in Example 3, where the units of radius of curvature and thickness are millimeters (mm), as shown in Table 5: Table 5 Table 6 shows the aspherical coefficients of the lighting projection component 100 in Embodiment 1 of this application, as shown in Table 6: Table 6 Among them, the non-curved surfaces of each lens in the imaging lens group 10 satisfy: ; 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-S9 are shown in Table 6.

[0077] 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.

[0078] The above provides design data for the imaging lens group 10 of Embodiment 3 of this application: effective focal length f = 4.219 mm; maximum field of view Fov = 70.063°; total optical length TTL1 = 27.986 mm; aperture F-number F.No1 = 1.498; and design data for the illumination lens group 20: effective focal length EFL2 = 3.269 mm; total optical length TTL2 = 7.171 mm; aperture F-number F.No2 = 3.508.

[0079] In one embodiment provided in this application, f / EPD=1.5.

[0080] In one embodiment provided in this application, (TTL1 / f) / Tan(Semi-Fov)=9.464.

[0081] In one embodiment provided in this application, (f5-f4) / f=11.994.

[0082] In one embodiment provided in this application, f2 / f = 2.356.

[0083] In one embodiment provided in this application, R11 / f1 = 1.362.

[0084] In one embodiment provided in this application, f2 / (T23-T12)=1.781.

[0085] In one embodiment provided in this application, (R41+R52) / f45=14.918.

[0086] In one embodiment provided in this application, (T23+T34) / (CT2+CT3)=2.849.

[0087] In one embodiment provided in this application, f45 / (DT41+DT52)=1.944.

[0088] In one embodiment provided in this application, R22 / SAG22+R32 / SAG32=149.477.

[0089] See Figure 15 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 S10 of the imaging lens group 10, and the pattern to be projected is tilted on the film. Figure 16 and Figure 17 The performance of the projection pattern of the lighting projection component in Embodiment 3 is described. The lighting projection component in Embodiment 3 projects a pattern with a length × width of 1476mm × 318mm, which improves the recognizability of the projected pattern. Figures 18 to 21The optical performance of the imaging lens group 10 is described, ensuring the clarity of the pattern projected by the illumination projection assembly.

[0090] Example 4

[0091] In Embodiment 4, 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 fourth lens 14, S8 represents the object-side surface of the fourth lens 14, S9 represents the object-side surface of the fifth lens 15, the fourth lens 14 and the fifth lens 15 are cemented together, S10 represents the image-side surface of the film 40, S11 represents the image-side surface of the sixth lens 21, S12 represents the object-side surface of the sixth lens 21, S13 represents the image-side surface of the seventh lens 22, and S14 represents the object-side surface of the seventh lens 22.

[0092] Please see Figure 22 , Figure 22 The dotted line is used to represent the optical axis. The illumination projection assembly 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. The imaging lens group 10 includes, sequentially from the image side to the object side: The first 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. The second 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. 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 convex near the optical axis. The fourth lens with negative optical power has a convex image-side surface near the optical axis; 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 concave near the optical axis. The imaging lens group has five lenses with optical power, and the first lens, the second lens, the third lens, the fourth lens, and the fifth lens are all aspherical lenses.

[0093] The illumination lens group comprises, sequentially from the image side to the object side, the following: The sixth 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. The seventh 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. 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 Fov represent the maximum field of view of the imaging lens group 10, and let EFL2 represent the maximum field of view of the illumination lens group 20; let f represent the effective focal length of the imaging lens group 10, and let EFL2 represent the effective focal length of the illumination lens group 20; let F.No1 represent the aperture F-value of the imaging lens group 10, and let F.No2 represent the aperture F-value 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, Fov, f, EFL2, surface type, radius of curvature, thickness, material refractive index, dispersion coefficient, and conic coefficient in Example 4, where the units of radius of curvature and thickness are millimeters (mm), as shown in Table 7: Table 7 Table 8 shows the aspheric coefficients of the illumination projection assembly 100 of Embodiment 4 of this application, as shown in Table 8: Table 8 Among them, the non-curved surfaces of each lens in the imaging lens group 10 satisfy: ; 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-S9 are shown in Table 8.

[0094] 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.

[0095] The above provides design data for the imaging lens group 10 of Embodiment 4 of this application: effective focal length f = 4.911 mm; maximum field of view Fov = 62°; total optical length TTL1 = 24.594 mm; aperture F-number F.No1 = 1.995; and design data for the illumination lens group 20: effective focal length EFL2 = 3.269 mm; total optical length TTL2 = 7.171 mm; aperture F-number F.No2 = 3.508.

[0096] In one embodiment provided in this application, f / EPD=1.999.

[0097] In one embodiment provided in this application, (TTL1 / f) / Tan(Semi-Fov)=8.335.

[0098] In one embodiment provided in this application, (f5-f4) / f=-6.075.

[0099] In one embodiment provided in this application, f2 / f = 1.450.

[0100] In one embodiment provided in this application, R11 / f1 = 1.383.

[0101] In one embodiment provided in this application, f2 / (T23-T12)=1.413.

[0102] In one embodiment provided in this application, (R41+R52) / f45=1.543.

[0103] In one embodiment provided in this application, (T23+T34) / (CT2+CT3)=1.5.

[0104] In one embodiment provided in this application, f45 / (DT41+DT52)=3.707.

[0105] In one embodiment provided in this application, R22 / SAG22+R32 / SAG32=-15.953.

[0106] See Figure 22 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 S10 of the imaging lens group 10, and the pattern to be projected is tilted on the film. Figure 23 and Figure 24 The performance of the projection pattern of the illumination projection component in Example 4 is described. The illumination projection component in Example 4 projects a pattern with a length × width of 960mm × 276mm, which improves the recognizability of the projected pattern. Figures 25 to 28 The optical performance of the imaging lens group 10 is described, ensuring the clarity of the pattern projected by the illumination projection assembly.

[0107] The data from each embodiment are summarized in Table 9: Table 9 It should be noted that the pattern projected in the lighting 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.

[0108] 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. An illumination projection assembly, comprising an illumination lens group for focusing light from a light source, an imaging lens group for adjusting the field of view of the light imaging, and a housing assembly; The imaging lens group and the illumination lens group are installed sequentially from the object side to the image side within the housing assembly; The imaging lens group includes, sequentially from the image side to the object side: The first lens with negative optical power has an image-side surface that is concave near the optical axis. The second lens with positive optical power has an image-side surface that is convex near the optical axis. The third lens with positive optical power has a convex image-side surface near the optical axis; The fourth lens with negative optical power has a convex image-side surface near the optical axis; The fifth lens with positive optical power has a convex image-side surface near the optical axis; The imaging lens group has five lenses; The imaging lens group satisfies the following condition: 1.5 <f / EPD<2.0; 6.4<(TTL1 / f) / Tan(Semi-Fov)<9.4; Where f is the total effective focal length of the imaging lens group, EPD is the entrance pupil diameter of the imaging lens group, TTL1 is the distance on the optical axis from the image side of the first lens of the imaging lens group to the object side of the imaging lens group, and Semi-Fov is half of the maximum field of view of the imaging lens group. The illumination lens group comprises, sequentially from the image side to the object side, the following: The sixth 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. The seventh lens, which has positive optical power, has a convex image side near the optical axis and a flat object side.

2. The lighting projection assembly according to claim 1, characterized in that, The imaging lens group satisfies the following condition: -6.1 < (f5 - f4) / f < 12.7; 1.45 <f2 / f<3.45; Wherein, f5 is the effective focal length of the fifth lens, f4 is the effective focal length of the fourth lens, f is the total effective focal length of the imaging lens group, and f2 is the effective focal length of the second lens.

3. The lighting projection assembly according to claim 1, characterized in that, The imaging lens group satisfies the following condition: 1.36 <R11 / f1<17.35; Wherein, R11 is the radius of curvature of the image side of the first lens, and f1 is the effective focal length of the first lens.

4. The lighting projection assembly according to claim 1, characterized in that, The imaging lens group satisfies the following condition: 1.4 <f2 / (T23-T12)<20.5; Where f2 is the effective focal length of the second lens, T23 is the air gap between the second and third lenses on the optical axis, and T12 is the air gap between the first and second lenses on the optical axis.

5. The lighting projection assembly according to claim 1, characterized in that, The imaging lens group satisfies the following condition: 0.24 < (R41 + R52) / f45 < 14.92; Wherein, R41 is the radius of curvature of the image side of the fourth lens, R52 is the radius of curvature of the object side of the fifth lens, and f45 is the combined focal length of the fourth and fifth lenses.

6. The lighting projection assembly according to claim 1, characterized in that, The imaging lens group satisfies the following condition: 1.5<(T23+T34) / (CT2+CT3)<2.85; Wherein, T23 is the air gap between the second lens and the third lens on the optical axis; T34 is the air gap between the third lens and the fourth lens on the optical axis; CT2 is the center thickness of the second lens on the optical axis; and CT3 is the center thickness of the third lens on the optical axis.

7. The lighting projection assembly according to claim 1, characterized in that, The imaging lens group satisfies the following condition: 1.6 <f45 / (DT41+DT52)<3.7; Wherein, f45 is the combined focal length of the fourth lens and the fifth lens; DT41 is the maximum effective half-aperture of the image side of the fourth lens; and DT52 is the maximum effective half-aperture of the object side of the fifth lens.

8. The lighting projection assembly according to claim 1, characterized in that, The imaging lens group satisfies the following condition: -16 <R22 / SAG22+R32 / SAG32<149.5; Wherein, R22 is the radius of curvature of the object-side surface of the second lens, R32 is the radius of curvature of the object-side surface of the third lens, SAG22 is the distance on the optical axis from the intersection of the object-side surface of the second lens and the optical axis to the vertex of the effective radius of the object-side surface of the second lens; SAG32 is the distance on the optical axis from the intersection of the object-side surface of the third lens and the optical axis to the vertex of the effective radius of the object-side surface of the third lens.

9. A welcome light, characterized in that, Includes the lighting projection assembly as described in any one of claims 1 to 8.

Images