Lighting projection assembly and welcome light

Abstract

The application discloses a kind of lighting projection components and welcome lamp, above-mentioned lighting projection component, including lighting component, imaging component and shell;Imaging component sequentially includes along the image side to object side: the first lens with negative focal length;Second lens with positive focal length;Third lens with positive focal length;The fourth lens with negative focal length;Imaging component satisfies the following conditional formula: 0.150 < tanSemi-Fov × [f / (f2+f3)] <0.349.The lighting projection component provided by the application, the pattern range projected can reach long x wide: 340mm x 130mm to long x wide: 1900mm x 730mm, and the length is shorter, and the projected pattern is clear.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical imaging technology, in particular to a lighting projection assembly and a welcome lamp. BACKGROUND

[0002] With the continuous development of intelligent and technological direction of the automobile, many cars on the market have car welcome lamps installed on the outside rearview mirror. When the car welcome lamp is installed on the outside rearview mirror of the car, the car welcome lamp can project patterns or graphics on the ground during the process of people getting on and off the car, thereby increasing the sense of technology of the car.

[0003] However, with the development of the market demand for welcome lamps, the demand for the patterns projected by the welcome lamp is increasing, and the clarity of the projected patterns is also increasing, and the size requirement is also increasing, and the clarity is also required to be high. SUMMARY

[0004] In order to overcome the defects of the prior art, the technical problem to be solved by the present application is to provide a lighting projection assembly and a welcome lamp with large projection pattern area, small external length and clear projection pattern.

[0005] In a first aspect, a lighting projection assembly includes an illumination assembly for focusing light rays of a light source, an imaging assembly for adjusting the field of view angle of the light rays, and a housing; the imaging assembly and the illumination assembly are sequentially installed in the housing from the object side to the image side; the imaging assembly includes, in order from the image side to the object side:

[0006] a first lens with negative focal power, the image side of which is convex near the optical axis;

[0007] a second lens with positive focal power, the image side of which is convex near the optical axis;

[0008] a third lens with positive focal power, the image side of which is convex near the optical axis;

[0009] a fourth lens with negative focal power, the object side of which is concave near the optical axis;

[0010] The imaging assembly satisfies the following condition formula:

[0011] 0.150 < tanSemi-Fov x [f / (f2+f3)] < 0.349;

[0012] Wherein, Semi-Fov is half of the maximum field of view angle of the imaging assembly, f is the total effective focal length of the imaging assembly, f2 is the effective focal length of the second lens, and f3 is the effective focal length of the third lens.

[0013] In one embodiment, the imaging assembly satisfies the following condition formula:

[0014] 0.894 < CT3 / (SAG31 + SAG32) < 6.167;

[0015] wherein SAG31 is the distance from the intersection of the image side surface of the third lens and the optical axis to the effective radius vertex of the image side surface of the third lens on the optical axis, SAG32 is the distance from the intersection of the object side surface of the third lens and the optical axis to the effective radius vertex of the object side surface of the third lens on the optical axis, and CT3 is the center thickness of the third lens on the optical axis.

[0016] In one of the embodiments, the imaging assembly satisfies the following conditional expression: -1.065 < f1 / f12 < -0.357;

[0017] wherein f1 is the effective focal length of the first lens, and f12 is the combined focal length of the first lens and the second lens.

[0018] In one of the embodiments, the imaging assembly satisfies the following conditional expression:

[0019] 0.085 < SAG11 / DT11 < 0.174;

[0020] wherein 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 of the image side surface of the first lens on the optical axis, and DT11 is the maximum effective radius of the image side surface of the first lens.

[0021] In one of the embodiments, the imaging assembly satisfies the following conditional expression:

[0022] 3.216 < (DT41 + DT42) / CT4 < 6.450;

[0023] wherein DT41 is the maximum effective radius of the image side surface of the fourth lens, DT42 is the maximum effective radius of the object side surface of the fourth lens, and CT4 is the center thickness of the fourth lens on the optical axis.

[0024] In one of the embodiments, the imaging assembly satisfies the following conditional expression:

[0025] 2.173 < TTL / (CT2 + CT3) < 2.800;

[0026] wherein TTL is the distance from the image side surface of the first lens to the object side surface of the imaging assembly 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.

[0027] In one of the embodiments, the imaging assembly satisfies the following conditional expression:

[0028] -1.518 < (R41+R42) / f4 < -1.542;

[0029] wherein R41 is a curvature radius of an image side surface of the fourth lens, R42 is a curvature radius of an object side surface of the fourth lens, and f4 is an effective focal length of the fourth lens.

[0030] In one of the embodiments, the imaging assembly satisfies the following conditional expression:

[0031] 2.540 < TTL / ImgH < 3.083;

[0032] wherein TTL is a distance on the optical axis from an image side surface of the first lens to an object side surface of the imaging assembly, and ImgH is a maximum image height of the imaging assembly.

[0033] In one of the embodiments, the illumination assembly comprises a fifth lens and a sixth lens;

[0034] The fifth lens and the sixth lens are sequentially arranged in the housing from the object side to the image side, and the sixth lens is located at the object side of the fifth lens.

[0035] In a second aspect, the application provides a welcome lamp comprising the illumination projection assembly in any possible implementation manner of the first aspect.

[0036] The application has the following beneficial effects:

[0037] The smaller the field of view angle, the smaller the included angle of the projected light, and the smaller the projected pattern range; conversely, the larger the field of view angle, the larger the included angle of the projected light, and the larger the projected pattern range; by restricting the range of the field of view angle, the field of view angle of the imaging assembly can be controlled within the required range; when the field of view angle is 4.989°, the projected pattern range is 340mm*130mm; when the field of view angle is 73.993°, the projected pattern range is 1900mm*730mm; therefore, by restricting the field of view angle within a reasonable range, the pattern range projected by the illumination projection assembly can be between 340mm*130mm and 1900mm*730mm, greatly improving the use range of the illumination projection assembly.

[0038] On the basis of restricting tanSemi-Fov, the range of tanSemi-Fov*f is further restricted, so that the illumination projection assembly not only has a large pattern projection range, but also restricts the total focal length f of the imaging assembly within a small range, controls the total length of the imaging lens within a small range, is conducive to controlling the length of the imaging assembly, thereby controlling the overall length of the illumination projection assembly, so that the length of the illumination projection assembly is relatively short, which is conducive to miniaturization.

[0039] In addition, on the basis of restricting the field of view angle and the total focal length f of the imaging assembly, the range of tanSemi-Fovx[f / (f2+f3)] is further restricted, the focal length of the second lens and the focal length of the third lens are reasonably allocated in the proportion of the total effective focal length of the imaging assembly, the system chromatic aberration of the imaging assembly can be effectively corrected, the distortion and coma can be improved, the resolution of the imaging assembly can be improved, and the clarity of the projected pattern of the illumination projection assembly can be improved; at the same time, the sum of the focal length of the first lens and the focal length of the second lens is controlled in a reasonable range with respect to the total effective focal length of the imaging assembly, the process sensitivity of the imaging assembly is reduced, the production yield of the imaging assembly is improved, and the yield of the illumination projection assembly is improved. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 is a schematic structural diagram of the imaging assembly of Embodiment 1 of the present application;

[0041] Figure 2 is a positioning diagram of the pattern on the film in the illumination projection assembly of Embodiment 1 of the present application;

[0042] Figure 3 and Figure 4 are respectively the measurement and mapping diagrams of the length and width directions of the projected pattern of Embodiment 1 of the present application;

[0043] Figures 5 to 8 are respectively the spherical aberration curve diagram, the astigmatism curve diagram, the distortion diagram and the magnification chromatic aberration diagram of the imaging assembly of Embodiment 1 of the present application;

[0044] Figure 9 is a schematic structural diagram of the imaging assembly of Embodiment 2 of the present application;

[0045] Figure 10 is a positioning diagram of the pattern on the film in the illumination projection assembly of Embodiment 2 of the present application;

[0046] Figure 11 and Figure 12 are respectively the measurement and mapping diagrams of the length and width directions of the projected pattern of Embodiment 2 of the present application;

[0047] Figures 13 to 16 are respectively the spherical aberration curve diagram, the astigmatism curve diagram, the distortion diagram and the magnification chromatic aberration diagram of the imaging assembly of Embodiment 2 of the present application;

[0048] Figure 17 is a schematic structural diagram of the imaging assembly of Embodiment 3 of the present application;

[0049] Figure 18 is a positioning diagram of the pattern on the film in the illumination projection assembly of Embodiment 3 of the present application;

[0050] Figure 19 and Figure 20are the mapping diagrams of the projection pattern length and width direction of the embodiment 3 of the present application, respectively;

[0051] Figures 21 to 24 are, in turn, the sagittal curve diagram, the astigmatic curve diagram, the distortion diagram and the lateral chromatic aberration diagram of the imaging assembly of the embodiment 3 of the present application;

[0052] Figure 25 is the schematic structural diagram of the imaging assembly of the embodiment 4 of the present application;

[0053] Figure 26 is the positioning diagram of the pattern on the film in the illumination projection assembly of the embodiment 4 of the present application;

[0054] Figure 27 and Figure 28 are the mapping diagrams of the projection pattern length and width direction of the embodiment 4 of the present application, respectively;

[0055] Figures 29 to 32 are, in turn, the sagittal curve diagram, the astigmatic curve diagram, the distortion diagram and the lateral chromatic aberration diagram of the imaging assembly of the embodiment 4 of the present application;

[0056] Figure 33 is the schematic structural diagram of the imaging assembly of the embodiment 5 of the present application;

[0057] Figure 34 is the positioning diagram of the pattern on the film in the illumination projection assembly of the embodiment 5 of the present application;

[0058] Figure 35 and Figure 36 are the mapping diagrams of the projection pattern length and width direction of the embodiment 5 of the present application, respectively;

[0059] Figures 37 to 40 are, in turn, the sagittal curve diagram, the astigmatic curve diagram, the distortion diagram and the lateral chromatic aberration diagram of the imaging assembly of the embodiment 5 of the present application;

[0060] Figure 41 is the schematic structural diagram of the illumination projection assembly of the present application;

[0061] Figure 42 is the schematic structural diagram of the housing of the illumination projection assembly of the present application.

[0062] In the figure: 100, illumination projection assembly; 10, imaging assembly; 11, first lens; 12, second lens; 13, third lens; 14, fourth lens; 15, housing; 16, film holder; 17, film; 20, illumination assembly; 21, fifth lens; 22, sixth lens. DETAILED DESCRIPTION

[0063] For the purpose of clarity, the present application will be described in greater detail below with reference to the accompanying drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be realized in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the application to those skilled in the art.

[0064] For the purpose of clarity, the technical terms involved in the present application will be explained and described below.

[0065] It should be noted that, for the purpose of clarity and description, the present application defines the representation of the related parameters of the imaging assembly, for example, TTL represents the distance on the optical axis from the object side surface of the first lens to the imaging surface of the optical lens; ImgH represents the maximum image height of the imaging assembly, and the similar defined letters are only illustrative, and of course other forms of representation can also be used, which are not limited by the present application.

[0066] It should also be noted that the units of the parameters involved in the following relational expressions are consistent, for example, the numerator is in millimeters (mm) and the denominator is also in millimeters (mm).

[0067] It should also be noted that the positive and negative of the radius of curvature represent the optical surface convex to the object side or convex to the image side, when the optical surface (including the object side surface or the image side surface) is convex to the image side, the radius of curvature of the optical surface is positive; when the optical surface (including the object side surface or the image side surface) is convex to the object 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.

[0068] It should also be noted that the shape of the lens, the degree of concave and convex of the object side surface and the image side surface in the drawings are only illustrative and do not limit the present application. In the present application, the material of the lens can be resin, plastic, or glass. The lens includes spherical lenses and aspherical lenses. The lens can be a fixed focal length lens, or a zoom lens, and can also be a standard lens, a short focal length lens, or a long focal length lens.

[0069] Referring to Figure 1 , Figure 41 , and Figure 42 , Figure 1 , the dashed line in the drawings is used to represent the optical axis.

[0070] Please refer to Figure 1The illumination and projection assembly 100 in the embodiment comprises an illumination assembly 20 for focusing light rays from a light source, an imaging assembly 10 for adjusting the field of view angle of the light rays, and a housing 15; the imaging assembly 10 and the illumination assembly are sequentially installed in the housing 15 from the object side to the image side; the imaging assembly 10 comprises, in sequence from the image side to the object side: a first lens 11 with negative focal power, the image side of which is convex near the optical axis; a second lens 12 with positive focal power, the image side of which is convex near the optical axis; a third lens 13 with positive focal power, the image side of which is convex near the optical axis; and a fourth lens 14 with negative focal power, the object side of which is concave near the optical axis. The illumination assembly 20 comprises a fifth lens 21 and a sixth lens 22; the fifth lens 21 and the sixth lens 22 are sequentially installed in the housing 15 from the object side to the image side, and the sixth lens 22 is located on the object side of the fifth lens 21. A film 17 is arranged between the projection assembly 10 and the illumination assembly 20, and the film 17 is fixed by a film holder 16 arranged in the housing 15.

[0071] In the embodiment, the illumination and projection assembly 100 satisfies the following conditional expression: 0.150 < tanSemi-Fov x [f / (f2+f3)] < 0.349; tanSemi-Fov x [f / (f2+f3)] can be 0.150, 0.236, 0.287, 0.349, or 0.334; the smaller the field of view angle, the smaller the angle of the projected light, and the smaller the range of the projected pattern; conversely, the larger the field of view angle, the larger the angle of the projected light, and the larger the range of the projected pattern; by restricting the range of the field of view angle, the field of view angle of the imaging assembly can be controlled within the required range; when the field of view angle is 4.989°, the projected pattern range is length x width: 340 mm x 130 mm; when the field of view angle is 73.993°, the projected pattern range is length x width: 1900 mm x 730 mm; therefore, by restricting the field of view angle within a reasonable range, the pattern range projected by the illumination and projection assembly can be between length x width: 340 mm x 130 mm and length x width: 1900 mm x 730 mm, greatly improving the use range of the illumination and projection assembly; on the basis of restricting tanSemi-Fov, the range of tanSemi-Fov x f is further restricted, so that the illumination and projection assembly not only has a large pattern projection range, but also restricts the total focal length f of the imaging assembly within a small range, controls the total length of the imaging lens within a small range, is conducive to controlling the length of the imaging assembly, thereby controlling the overall length of the illumination and projection assembly, so that the length of the illumination and projection assembly is short, which is conducive to miniaturization; in addition, on the basis of restricting the field of view angle and the total focal length f of the imaging assembly, the range of tanSemi-Fov x [f / (f2+f3)] is further restricted, the focal length of the second lens and the focal length of the third lens are reasonably distributed in the proportion of the total effective focal length of the imaging assembly, which can effectively correct the system chromatic aberration of the imaging assembly, improve distortion and coma, and improve the resolution of the imaging assembly, thereby improving the clarity of the projected pattern of the illumination and projection assembly; at the same time, the ratio of the sum of the focal length of the first lens and the focal length of the second lens to the total effective focal length of the imaging assembly is controlled within a reasonable range, the process sensitivity of the imaging assembly is reduced, the production yield of the imaging assembly is improved, and the yield of the illumination and projection assembly is improved.

[0072] In one of the embodiments, the illumination and projection assembly 100 satisfies the following conditional expression: 0.894 < CT3 / (SAG31+SAG32) < 6.167; CT3 / (SAG31+SAG32) can be 1.247, 1.097, 0.894, 1.482 or 6.167; when satisfying 0.894 < CT3 / (SAG31+SAG32) < 6.167, the ratio of the third lens center thickness to the sum of the third lens object side and image side sag can be reasonably configured, which is conducive to reasonably controlling the shape of the third lens, thereby providing good conditions for the machining and assembly of the third lens; in addition, it is conducive to the third lens correcting the field curvature generated by the first lens and the second lens, thereby balancing the field curvature aberration of the imaging assembly and improving the imaging quality of the imaging assembly. When below the lower limit of the above conditional expression, the surface of the third lens is too complex, which is not conducive to the manufacturing and assembly of the third lens. When exceeding the upper limit of the above conditional expression, the surface of the third lens is too flat, which is difficult to balance the field curvature of the imaging assembly, thereby making the performance of the imaging assembly poor.

[0073] In one of the embodiments, the illumination and projection assembly 100 satisfies the following conditional expression: -1.065 < f1 / f12 < -0.357; f1 / f12 can be -0.969, -0.516, -0.407, -0.357 or -1.065; by reasonably allocating the ratio of the focal length of the first lens to the combined focal length of the first lens and the second lens, the system chromatic aberration of the imaging assembly can be effectively corrected, the distortion and coma can be improved, the resolution of the imaging assembly can be further improved, and the clarity of the projection pattern of the illumination and projection assembly can be improved.

[0074] In one of the embodiments, the illumination and projection assembly 100 satisfies the following conditional expression: 0.085 < SAG11 / DT11 < 0.174; SAG11 / DT11 can be 0.174, 0.117, 0.116, 0.115 or 0.085; by restricting the ratio of SAG11 / DT11 within a reasonable range, the aperture of the image side of the first lens can be controlled within a reasonable range, which is conducive to more light entering the imaging assembly, ensuring that the object side of the imaging assembly has sufficient illumination, and ensuring that the projection pattern of the illumination and projection assembly has sufficient brightness; in addition, it can also filter the stray light of the wide beam entering the object side of the first lens, reduce the stray light and ghost image of the imaging assembly, thereby improving the imaging quality of the imaging assembly and further improving the clarity of the projection pattern of the illumination and projection assembly.

[0075] In one of the embodiments, the illumination and projection assembly 100 satisfies the following conditional expression: 3.216 < (DT41+DT42) / CT4 < 6.450; (DT41+DT42) / CT4 can be 3.216, 4.088, 5.096, 5.374 or 6.450; by restricting the ratio of the sum of the fourth lens object side and image side thicknesses to the fourth lens center thickness, the thickness to aperture of the fourth lens can be reasonably controlled, the light deflection degree is increased, the total length of the imaging assembly is further shortened, and the miniaturization of the imaging assembly is facilitated.

[0076] In one of the embodiments, the illumination and projection assembly 100 satisfies the following conditional expression: 2.173 < TTL / (CT2+CT3) < 2.800; TTL / (CT2+CT3) can be 2.800, 2.648, 2.614, 2.585 or 2.173; by restricting 2.173 < TTL / (CT2+CT3) < 2.800 within a reasonable range, the structure of the imaging assembly can be more compact, and the miniaturization of the imaging assembly is further facilitated; in addition, the proportion of the center thickness of the second lens and the center thickness of the third lens in the total length of the imaging assembly is restricted, which is conducive to compensating for the system aberration of the imaging assembly and improving the imaging quality of the imaging assembly, thereby further improving the clarity of the projected pattern of the illumination and projection assembly.

[0077] In one of the embodiments, the illumination and projection assembly 100 satisfies the following conditional expression: -11.542 < (R41+R42) / f4 < -1.518; (R41+R42) / f4 can be -6.286, -11.542, -3.336, -1.960 or -1.518; by restricting the curvature radii of the object and image sides of the fourth lens, the bending degree of the fourth lens can be controlled, thereby improving the processing performance of the fourth lens and the manufacturing yield of the imaging assembly; in addition, the field curvature and distortion of the imaging assembly are improved, and the imaging performance of the imaging assembly is improved.

[0078] In one of the embodiments, the illumination and projection assembly 100 satisfies the following conditional expression: 2.540 < TTL / ImgH < 3.083; TTL / ImgH can be 3.081, 3.083, 2.797, 2.540 or 3.010; when 2.540 < TTL / ImgH < 3.083 is satisfied, the ratio of the optical total length to the image height of the imaging assembly can be reasonably distributed, thereby facilitating the shortening of the optical total length of the imaging assembly, achieving miniaturization design, while the imaging surface size of the imaging assembly can be improved, and the imaging quality of the imaging assembly is improved.

[0079] Referring to Figure 41 and Figure 42The lighting assembly 20 comprises a fifth lens 21 and a sixth lens 22, the sixth lens 22 is located on the object side of the fifth lens 21, after passing through the fifth lens 21 and the sixth lens 22, the light becomes horizontal and exits onto the film 17; or the light converges to a certain angle and exits onto the film 17 through the fifth lens 21 and the sixth lens 22, and a light-transmitting pattern to be projected is formed on the image side of the film 17 by magnetron sputtering and photolithography process. According to the length and width of the pattern to be projected, the size, shape and angle of the pattern to be projected on the film 17 will be different, which can be seen from the positioning diagram of the pattern on the film in each embodiment.

[0080] In the second aspect, the application further provides a welcome light comprising the lighting projection assembly in any possible implementation manner of the first aspect. The welcome light of the application is installed at the automobile footboard, so that the inclined pattern in the film is projected to the ground directly, avoiding the situation that the projected pattern is blocked when a person gets off the car. The power of the lamp bead in the welcome light of the application is 3 watts.

[0081] Some specific but non-limiting examples of the embodiments of the application will be described in detail below. Figures 1 to 42 Some specific but non-limiting examples of the embodiments of the application will be described in detail below.

[0082] Embodiment 1

[0083] The features, principles and other aspects of the application will be described in detail below. For the convenience of description, in the following embodiments, STO represents the surface of the diaphragm, 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 fourth lens 14, S8 represents the object side of the fourth lens 14, and S9 represents the object side of the imaging assembly 10.

[0084] Please refer to Figure 1 , Figure 1 The dashed line in the figure represents the optical axis. The lighting projection assembly in the embodiment comprises a lighting assembly for focusing the light of the light source, an imaging assembly for adjusting the imaging field angle of the light, and a housing; the imaging assembly and the lighting assembly are sequentially installed in the housing from the object side to the image side; the imaging assembly comprises, in order from the image side to the object side: a first lens with negative focal length, the image side S1 of which is convex near the optical axis, and the object side S2 of which is concave near the optical axis; a second lens with positive focal length, the image side S3 of which is convex near the optical axis, and the object side S4 of which is convex near the optical axis; a third lens with positive focal length, the image side S5 of which is convex near the optical axis, and the object side S6 of which is concave near the optical axis; a fourth lens with negative focal length, the image side S7 of which is convex near the optical axis, and the object side S8 of which is concave near the optical axis;

[0085] The total optical length of the imaging assembly 10 is denoted as TTL, the maximum image height of the imaging assembly 10 is denoted as ImgH, and the effective focal length of the imaging assembly 10 is denoted as EFL. The i-th asphericity coefficient of the imaging assembly 10 is denoted as ai, i = 4, 6, 8, 10, 12, 14, 16, and the conic coefficient is denoted as K. According to the above relationship, Table 1 shows the effective focal length EFL, the maximum field of view FOV, the total optical length TTL, the aperture F value F.No, the surface type, the radius of curvature, the thickness, the material refractive index, and the conic coefficient of the imaging assembly 10 in the first embodiment, wherein the radius of curvature and the thickness are in millimeters (mm), as shown in Table 1:

[0086] Table 1

[0087]

[0088] Table 2 shows the asphericity coefficients of the illumination projection assembly 100 in the first embodiment of the present application, as shown in Table 2:

[0089] Table 2

[0090] Face number A4 A6 A8 A10 A12 A14 A16 S1 -9.524E-03 -7.763E-04 -1.158E-05 -2.625E-05 1.512E-05 -8.617E-06 1.229E-06 S2 -1.037E-02 2.278E-03 -1.260E-03 2.658E-04 -3.911E-05 -1.404E-06 5.921E-07 S3 -5.230E-03 4.113E-03 -1.358E-03 2.704E-04 -4.571E-05 5.819E-06 -4.200E-07 S4 -3.362E-02 8.368E-03 -1.894E-03 3.443E-04 -3.426E-05 4.366E-06 -4.738E-07 S5 -9.638E-03 3.656E-03 -9.472E-04 2.086E-04 -3.216E-05 -4.235E-08 6.747E-07 S6 -1.073E-02 -1.367E-03 -2.661E-06 1.865E-04 -8.807E-05 -1.063E-05 4.548E-06 S7 -4.340E-02 -1.214E-03 -8.105E-04 2.553E-04 -2.141E-05 2.601E-06 -8.735E-06 S8 -3.120E-02 2.515E-05 1.628E-05 9.260E-05 -1.243E-05 -8.959E-07 1.364E-07

[0091] The asphericity of each lens of the imaging assembly 10 satisfies:

[0092]

[0093] wherein x is the distance from the vertex of the asphericity when the asphericity is at a height of h along the optical axis; c is the paraxial curvature of the asphericity, c = 1 / r (i.e., the paraxial curvature c is the inverse of the radius of curvature r in Table 1 above); k is the conic constant (given in Table 1 above); and Ai is the i-th order correction coefficient of the asphericity, the high-order coefficients A4, A6, A8, A10, A12, A14, and A16 of each lens surface S1-S8 are shown in Table 2.

[0094] It should be understood that the asphericity of each lens in the imaging assembly 10 can use the asphericity shown in the above asphericity formula, or other asphericity formulas, which are not limited in the present application.

[0095] The design data of the imaging assembly 10 in the first embodiment of the present application is given above, the effective focal length EFL is 5.833 mm, the maximum field of view FOV is 44.989 degrees, the total optical length TTL is 7.992 mm, and the aperture F value F.No is 2.027.

[0096] In one embodiment provided in the present application, tanSemi-Fov x [f / (f2+f3)] = 0.150.

[0097] In an embodiment provided by the present application, CT3 / (SAG31+SAG32)=1.247.

[0098] In an embodiment provided by the present application, f1 / f12=-0.969.

[0099] In an embodiment provided by the present application, SAG11 / DT11=0.174.

[0100] In an embodiment provided by the present application, (DT41+DT42) / CT4=3.216.

[0101] In an embodiment provided by the present application, TTL / (CT2+CT3)=2.800.

[0102] In an embodiment provided by the present application, (R41+R42) / f4=-6.286.

[0103] In an embodiment provided by the present application, TTL / ImgH=3.081.

[0104] Referring to Figure 2 In embodiment 1, a light-transmitting pattern to be projected is formed on the image side of the film sheet 17 by a magnetron sputtering coating and a photoetching process. The image side of the film sheet 17 is the object side S9 of the imaging assembly 10, and the pattern to be projected is inclined on the film sheet. Figure 3 and Figure 4 The performance of the illumination projection assembly in embodiment 1 is described, and the projected pattern is 340 mm x 130 mm in length x width. Figures 5 to 8 The optical performance of the imaging assembly 10 is described, which ensures the clarity of the pattern projected by the illumination projection assembly.

[0105] Embodiment 2

[0106] In embodiment 2, STO represents the surface of the diaphragm, 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 fourth lens 14, S8 represents the object side of the fourth lens 14, and S9 represents the object side of the imaging assembly 10.

[0107] Referring to Figure 9 , Figure 9The middle dotted line is used to represent the optical axis. The illumination projection assembly in the embodiment comprises an illumination assembly for focusing light rays of a light source, an imaging assembly for adjusting an imaging field angle of the light rays, and a housing; the imaging assembly and the illumination assembly are sequentially arranged in the housing from an object side to an image side; the imaging assembly comprises, in sequence from the image side to the object side: a first lens with negative focal length, an image side S1 of which is convex near the optical axis, and an object side S2 of which is concave near the optical axis; a second lens with positive focal length, an image side S3 of which is convex near the optical axis, and an object side S4 of which is concave near the optical axis; a third lens with positive focal length, an image side S5 of which is convex near the optical axis, and an object side S6 of which is concave near the optical axis; and a fourth lens with negative focal length, an image side S7 of which is convex near the optical axis, and an object side S8 of which is concave near the optical axis.

[0108] The total optical length of the imaging assembly 10 is represented by TTL, the maximum image height of the imaging assembly 10 is represented by ImgH, and the effective focal length of the imaging assembly 10 is represented by EFL. The ith aspheric surface coefficient is represented by ai, i = 4, 6, 8, 10, 12, 14, 16, and the conic coefficient is represented by K. According to the above relationship, Table 3 shows the effective focal length EFL, the maximum field of view FOV, the total optical length TTL, the aperture F value F.No, the surface type, the radius of curvature, the thickness, the material refractive index, and the conic coefficient of the imaging assembly 10 in Embodiment 2, wherein the units of the radius of curvature and the thickness are millimeters (mm), as shown in Table 3:

[0109] Table 3

[0110]

[0111]

[0112] Table 4 shows the aspheric surface coefficients of the illumination projection assembly 100 in Embodiment 2 of the present application, as shown in Table 4:

[0113] Table 4

[0114] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.671E-02 7.883E-04 -4.137E-04 -2.913E-04 2.776E-04 -9.574E-05 1.106E-05 S2 -1.989E-02 9.873E-03 -5.567E-03 1.863E-03 -3.780E-04 4.411E-05 -2.545E-06 S3 -1.475E-02 1.095E-02 -5.979E-03 2.201E-03 -5.399E-04 7.386E-05 -4.100E-06 S4 -6.638E-02 2.370E-02 -8.654E-03 2.499E-03 -4.849E-04 5.188E-05 -2.251E-06 S5 -1.871E-02 1.105E-02 -4.693E-03 1.465E-03 -2.910E-04 2.993E-05 -1.181E-06 S6 9.998E-03 -3.628E-03 -1.380E-03 1.399E-03 -4.327E-04 5.862E-05 -2.944E-06 S7 -4.874E-02 6.822E-03 -4.157E-03 1.870E-03 -3.875E-04 3.820E-05 -1.439E-06 S8 -4.454E-02 8.542E-03 -2.215E-03 5.139E-04 -7.128E-05 5.076E-06 -1.440E-07

[0115] The non-curvature surface of each lens of the imaging assembly 10 satisfies:

[0116]

[0117] wherein x is the sagittal height of the aspherical surface at a position along the optical axis at a height h from the vertex of the aspherical surface; c is the paraxial curvature of the aspherical surface, c = 1 / r (i.e., the paraxial curvature c is the inverse of the radius of curvature r in Table 3 above); k is the conic constant (given in Table 3 above); and Ai is the correction coefficient of the i-th aspherical term, the coefficients A4, A6, A8, A10, A12, A14 and A16 of the higher order terms of each lens surface S1-S8 are shown in Table 4.

[0118] It should be understood that the aspherical surface of each lens in the imaging assembly 10 can use the aspherical surface shown in the aspherical surface formula described above, or other aspherical surface formula, which is not limited in the present application.

[0119] The design data of the imaging assembly 10 of the embodiment 2 of the present application is given above, the effective focal length EFL is 5.276 mm, the maximum field of view Fov is 51.982°, the total optical length TTL is 7.993 mm, and the aperture F value F.No is 2.024.

[0120] In one embodiment provided by the present application, tanSemi-Fov x [f / (f2+f3)] = 0.236.

[0121] In one embodiment provided by the present application, CT3 / (SAG31+SAG32) = 1.097.

[0122] In one embodiment provided by the present application, f1 / f12 = -0.516.

[0123] In one embodiment provided by the present application, SAG11 / DT11 = 0.117.

[0124] In one embodiment provided by the present application, (DT41+DT42) / CT4 = 4.088.

[0125] In one embodiment provided by the present application, TTL / (CT2+CT3) = 2.648.

[0126] In one embodiment provided by the present application, (R41+R42) / f4 = -11.542.

[0127] In one embodiment provided by the present application, TTL / ImgH = 3.083.

[0128] Referring to Figure 10 In the embodiment 2, the light-transmitting pattern to be projected is formed on the image side of the film 17 by a magnetron sputtering coating and a photoetching process, the image side of the film 17 is the object side S9 of the imaging assembly 10, and the pattern to be projected is arranged on the film 17 in an inclined manner. Figure 11 and Figure 12The performance of the illumination projection assembly 100 in projecting the pattern is described. The illumination projection assembly in Example 2 projects a pattern with a length x width of 475 mm x 190 mm. Figures 13 to 16 The optical performance of the imaging assembly 10 is described to ensure the clarity of the pattern projected by the illumination projection assembly.

[0129] Example 3

[0130] In Example 3, STO represents the surface of the 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, and S9 represents the object side surface of the imaging assembly 10.

[0131] Please refer to Figure 17 , Figure 17 In this embodiment, the illumination projection assembly includes an illumination assembly for focusing light from a light source, an imaging assembly for adjusting the field of view of the light, and a housing; the imaging assembly and the illumination assembly are sequentially installed in the housing from the object side to the image side; the imaging assembly sequentially includes, from the image side to the object side: a first lens with negative focal power, the image side surface S1 of which is convex near the optical axis, and the object side surface S2 of which is concave near the optical axis; a second lens with positive focal power, the image side surface S3 of which is convex near the optical axis, and the object side surface S4 of which is concave near the optical axis; a third lens with positive focal power, the image side surface S5 of which is convex near the optical axis, and the object side surface S6 of which is concave near the optical axis; and a fourth lens with negative focal power, the image side surface S7 of which is convex near the optical axis, and the object side surface S8 of which is concave near the optical axis.

[0132] TTL represents the total optical length of the imaging assembly 10, ImgH represents the maximum image height of the imaging assembly 10, and EFL represents the effective focal length of the imaging assembly 10. ai represents the i-th asphericity coefficient, i = 4, 6, 8, 10, 12, 14, 16, and K represents the conic coefficient. According to the above relationship, Table 5 shows the effective focal length EFL, the maximum field of view FOV, the total optical length TTL, the aperture F value F.No, the surface type, the radius of curvature, the thickness, the material refractive index, and the conic coefficient of the imaging assembly 10 in Example 3, wherein the units of the radius of curvature and the thickness are millimeters (mm), as shown in Table 5:

[0133] Table 5

[0134]

[0135] Table 6 shows the aspherical coefficients of the illumination projection assembly 100 of the embodiment of the present application, as shown in Table 6:

[0136] Table 6

[0137] Face number A4 A6 A8 A10 A12 A14 A16 S1 -3.184E-02 7.094E-03 -3.236E-03 -3.151E-03 4.269E-03 -1.847E-03 2.595E-04 S2 -3.986E-02 3.446E-02 -2.991E-02 1.620E-02 -5.453E-03 1.077E-03 -9.547E-05 S3 -2.859E-02 2.782E-02 -2.371E-02 1.281E-02 -4.727E-03 1.045E-03 -9.760E-05 S4 -1.246E-01 6.357E-02 -3.186E-02 1.206E-02 -3.080E-03 4.480E-04 -2.743E-05 S5 -3.423E-02 2.531E-02 -1.629E-02 6.998E-03 -1.992E-03 3.226E-04 -2.177E-05 S6 2.510E-02 -2.077E-02 5.161E-03 1.765E-04 -6.027E-04 1.612E-04 -1.318E-05 S7 -6.701E-02 1.324E-02 -7.446E-03 5.399E-03 -1.956E-03 3.380E-04 -2.200E-05 S8 -5.034E-02 1.243E-02 -3.478E-03 1.138E-03 -2.636E-04 3.350E-05 -1.740E-06

[0138] wherein the aspherical surface of each lens of the imaging assembly 10 satisfies:

[0139]

[0140] wherein x is the sagittal height of the aspherical surface at a position along the optical axis at a height h from the vertex of the aspherical surface; c is the paraxial curvature of the aspherical surface, c = 1 / r (i.e., the paraxial curvature c is the inverse of the radius of curvature r in Table 5 above); k is the conic constant (given in Table 5 above); Ai is the correction coefficient of the i-th order of the aspherical surface, the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of each lens surface S1-S8 are shown in Table 6.

[0141] It should be understood that the aspherical surface of each lens in the imaging assembly 10 can use the aspherical surface shown in the above aspherical surface formula, or other aspherical surface formula, which is not limited in the present application.

[0142] The design data of the imaging assembly 10 of the embodiment 3 of the present application is given above, with an effective focal length EFL of 4.702 mm, a maximum field of view Fov of 59.981°, an optical total length TTL of 7.252 mm, and an aperture F value F.No of 2.025.

[0143] In one embodiment provided by the present application, tanSemi-Fov x [f / (f2+f3)] = 0.287.

[0144] In one embodiment provided by the present application, CT3 / (SAG31+SAG32) = 0.894.

[0145] In one embodiment provided by the present application, f1 / f12 = -0.407.

[0146] In one embodiment provided by the present application, SAG11 / DT11 = 0.116.

[0147] In one embodiment provided by the present application, (DT41+DT42) / CT4 = 5.096.

[0148] In one embodiment provided by the present application, TTL / (CT2+CT3) = 2.614.

[0149] In one embodiment provided by the present application, (R41+R42) / f4 = -3.336.

[0150] In one embodiment provided in the present application, TTL / ImgH = 2.797.

[0151] Referring to Figure 18 In embodiment 3, a light-transmitting pattern to be projected is formed on the image side of the film sheet 17 by a magnetron sputtering coating and a photoetching process. The image side of the film sheet 17 is the object side S9 of the imaging assembly 10, and the pattern to be projected is obliquely arranged on the film sheet. Figure 19 and Figure 20 The performance of the illumination and projection assembly in projecting the pattern is described in embodiment 3. The illumination and projection assembly in embodiment 3 projects a pattern with a length x width of 710 mm x 260 mm. Figures 21 to 24 The optical performance of the imaging assembly 10 is described to ensure the clarity of the pattern projected by the illumination and projection assembly.

[0152] Embodiment 4

[0153] In embodiment 4, STO represents the surface of the diaphragm, 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 fourth lens 14, S8 represents the object side of the fourth lens 14, and S9 represents the object side of the imaging assembly 10.

[0154] Referring to Figure 25 , Figure 25 The dashed line in the figure represents the optical axis. The illumination and projection assembly in the embodiment includes an illumination assembly for focusing the light from the light source, an imaging assembly for adjusting the imaging field angle of the light, and a housing. The imaging assembly and the illumination assembly are sequentially arranged in the housing from the object side to the image side. The imaging assembly sequentially includes, from the image side to the object side, a first lens with a negative focal length, whose image side S1 is convex near the optical axis and whose object side S2 is concave near the optical axis; a second lens with a positive focal length, whose image side S3 is convex near the optical axis and whose object side S4 is concave near the optical axis; a third lens with a positive focal length, whose image side S5 is convex near the optical axis and whose object side S6 is concave near the optical axis; and a fourth lens with a negative focal length, whose image side S7 is convex near the optical axis and whose object side S8 is concave near the optical axis.

[0155] The total optical length of the imaging assembly 10 is denoted as TTL, the maximum image height of the imaging assembly 10 is denoted as ImgH, and the effective focal length of the imaging assembly 10 is denoted as EFL. The i-th asphericity coefficient of the imaging assembly 10 is denoted as ai, i = 4, 6, 8, 10, 12, 14, 16, and the conic coefficient is denoted as K. According to the above relationship, Table 7 shows the effective focal length EFL, the maximum field of view FOV, the total optical length TTL, the aperture F value F.No, the surface type, the radius of curvature, the thickness, the material refractive index, and the conic coefficient of the imaging assembly 10 in Embodiment 4, wherein the radius of curvature and the thickness are in millimeters (mm), as shown in Table 7:

[0156] Table 7

[0157]

[0158] Table 8 shows the asphericity coefficients of the illumination projection assembly 100 in Embodiment 4 of the present application, as shown in Table 8:

[0159] Table 8

[0160] Face number A4 A6 A8 A10 A12 A14 A16 S1 -3.098E-02 7.094E-03 -3.236E-03 -3.790E-03 4.269E-03 -1.847E-03 2.595E-04 S2 -3.721E-02 3.516E-02 -3.064E-02 1.620E-02 -5.453E-03 1.077E-03 -9.547E-05 S3 -3.229E-02 3.208E-02 -2.587E-02 1.411E-02 -5.245E-03 1.131E-03 -1.014E-04 S4 -1.767E-01 9.155E-02 -4.215E-02 1.417E-02 -3.024E-03 3.239E-04 -9.558E-06 S5 -5.448E-03 2.040E-03 -6.646E-03 1.359E-03 2.167E-04 -1.793E-04 2.631E-05 S6 7.294E-02 -5.653E-02 1.536E-02 -2.142E-03 -1.480E-04 7.556E-05 -4.026E-06 S7 -9.215E-02 1.426E-02 -4.316E-03 5.407E-03 -2.551E-03 5.071E-04 -3.623E-05 S8 -1.093E-01 2.611E-02 -4.424E-03 3.420E-04 3.818E-05 -8.054E-06 3.267E-07

[0161] The asphericity of each lens of the imaging assembly 10 satisfies:

[0162]

[0163] wherein x is the distance sag of the asphericity at a height h along the optical axis from the vertex of the asphericity, c is the paraxial curvature of the asphericity, c = 1 / r (i.e., the paraxial curvature c is the inverse of the radius of curvature r in Table 7 above), k is the conic constant (given in Table 7 above), and ai is the i-th order correction coefficient of the asphericity, the high-order coefficients A4, A6, A8, A10, A12, A14, and A16 of each lens surface S1-S8 are shown in Table 8.

[0164] It should be understood that the asphericity of each lens in the imaging assembly 10 can use the asphericity shown in the above asphericity formula, or other asphericity formulas, which are not limited in the present application.

[0165] The above gives the design data of the imaging assembly 10 in Embodiment 4 of the present application, the effective focal length EFL is 4.217 mm, the maximum field of view Fov is 69.986°, the total optical length TTL is 6.609 mm, and the aperture F value F.No is 2.021.

[0166] In one embodiment provided in the present application, tanSemi-Fov x [f / (f2+f3)] = 0.349.

[0167] In an embodiment provided by the application, CT3 / (SAG31+SAG32)=1.482.

[0168] In an embodiment provided by the application, f1 / f12=-0.357.

[0169] In an embodiment provided by the application, SAG11 / DT11=0.115.

[0170] In an embodiment provided by the application, (DT41+DT42) / CT4=5.374.

[0171] In an embodiment provided by the application, TTL / (CT2+CT3)=2.585.

[0172] In an embodiment provided by the application, (R41+R42) / f4=-1.960.

[0173] In an embodiment provided by the application, TTL / ImgH=2.540.

[0174] Referring to Figure 26 In embodiment 4, the light-transmitting pattern to be projected is formed on the image side of the film sheet 17 by magnetron sputtering and photolithography, and the pattern to be projected is inclinedly arranged on the film sheet 17, i.e. the object side S9 of the imaging assembly 10. Figure 27 and Figure 28 The performance of the illumination and projection assembly in projecting the pattern is described, and the pattern projected by the illumination and projection assembly in embodiment 4 is 1300mm long and 520mm wide. Figures 29 to 32 The optical performance of the imaging assembly 10 is described, which ensures the definition of the pattern projected by the illumination and projection assembly.

[0175] Embodiment 5

[0176] In embodiment 5, STO represents the surface of the diaphragm, 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 fourth lens 14, S8 represents the object side of the fourth lens 14, and S9 represents the object side of the imaging assembly 10.

[0177] Referring to Figure 33 , Figure 33The middle dotted line is used to represent the optical axis. The illumination projection assembly in the embodiment comprises an illumination assembly for focusing light rays of a light source, an imaging assembly for adjusting an imaging field angle of the light rays, and a housing; the imaging assembly and the illumination assembly are sequentially arranged in the housing from an object side to an image side; the imaging assembly comprises, in sequence from the image side to the object side: a first lens with negative focal power, an image side S1 of which is convex near the optical axis, and an object side S2 of which is concave near the optical axis; a second lens with positive focal power, an image side S3 of which is convex near the optical axis, and an object side S4 of which is convex near the optical axis; a third lens with positive focal power, an image side S5 of which is convex near the optical axis, and an object side S6 of which is convex near the optical axis; and a fourth lens with negative focal power, an image side S7 of which is convex near the optical axis, and an object side S8 of which is concave near the optical axis.

[0178] The total optical length of the imaging assembly 10 is represented by TTL, the maximum image height of the imaging assembly 10 is represented by ImgH, and the effective focal length of the imaging assembly 10 is represented by EFL. The ith aspheric surface coefficient is represented by ai, i = 4, 6, 8, 10, 12, 14, 16, and the conic coefficient is represented by K. According to the above relationship, Table 9 shows the effective focal length EFL, the maximum field of view FOV, the total optical length TTL, the aperture F value F.No, the surface type, the radius of curvature, the thickness, the material refractive index, and the conic coefficient of the imaging assembly 10 in the embodiment 5, wherein the units of the radius of curvature and the thickness are millimeters (mm), as shown in Table 9:

[0179] Table 9

[0180]

[0181]

[0182] Table 10 shows the aspheric surface coefficients of the illumination projection assembly 100 in the embodiment 5 of the present application, as shown in Table 10:

[0183] Table 10

[0184] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.713E-02 9.374E-03 -1.343E-02 7.567E-03 -7.663E-04 -8.584E-04 2.233E-04 S2 -1.704E-02 2.157E-02 -2.476E-02 1.445E-02 -4.583E-03 7.500E-04 -4.973E-05 S3 -2.544E-02 2.234E-02 -1.694E-02 7.190E-03 -1.724E-03 2.270E-04 -1.285E-05 S4 -3.467E-02 7.519E-03 -2.574E-03 8.605E-04 -2.294E-04 3.261E-05 -1.588E-06 S5 -4.128E-03 3.652E-03 -2.060E-03 7.496E-04 -1.633E-04 1.847E-05 -8.659E-07 S6 -5.315E-03 2.160E-03 -3.122E-03 1.262E-03 -2.298E-04 1.854E-05 -4.868E-07 S7 -8.894E-02 1.574E-02 -6.568E-03 3.203E-03 -7.401E-04 7.874E-05 -3.160E-06 S8 -1.010E-01 3.054E-02 -7.088E-03 1.132E-03 -1.121E-04 5.975E-06 -1.292E-07

[0185] The non-curved surface of each lens of the imaging assembly 10 satisfies:

[0186]

[0187] wherein x is the sagittal height of the aspherical surface at a position along the optical axis at a height h from the vertex of the aspherical surface; c is the paraxial curvature of the aspherical surface, c = 1 / r (i.e., the paraxial curvature c is the inverse of the radius of curvature r in Table 9 above); k is the conic constant (given in Table 9 above); and Ai is the correction coefficient of the i-th aspherical term, the coefficients A4, A6, A8, A10, A12, A14 and A16 of the higher order terms of each lens surface S1-S8 are shown in Table 10.

[0188] It should be understood that the aspherical surface of each lens in the imaging assembly 10 can use the aspherical surface shown in the aspherical surface formula described above, or other aspherical surface formula, which is not limited in the present application.

[0189] The design data of the imaging assembly 10 of the embodiment 5 of the present application is given above, the effective focal length EFL is 4.367 mm, the maximum field of view Fov is 73.993°, the total optical length TTL is 7.833 mm, and the aperture F value F.No is 2.017.

[0190] In an embodiment provided by the present application, tanSemi-Fov x [f / (f2+f3)] = 0.334.

[0191] In an embodiment provided by the present application, CT3 / (SAG31+SAG32) = 6.167.

[0192] In an embodiment provided by the present application, f1 / f12 = -1.065.

[0193] In an embodiment provided by the present application, SAG11 / DT11 = 0.085.

[0194] In an embodiment provided by the present application, (DT41+DT42) / CT4 = 6.450.

[0195] In an embodiment provided by the present application, TTL / (CT2+CT3) = 2.173.

[0196] In an embodiment provided by the present application, (R41+R42) / f4 = -1.518.

[0197] In an embodiment provided by the present application, TTL / ImgH = 3.010.

[0198] Referring to Figure 34 In the embodiment 5, the light-transmitting pattern to be projected is formed on the image side of the film 17 by a magnetron sputtering coating and a photolithography process, the image side of the film 17 is the object side S9 of the imaging assembly 10, and the pattern to be projected is inclinedly arranged on the film. Figure 35 and Figure 36The performance of the projection pattern of the illumination projection assembly in example 5 is described, and the projection pattern of the illumination projection assembly in example 5 is 1900mm*730mm. Figures 37 to 40 The optical performance of the imaging assembly 10 is described, which guarantees the definition of the projection pattern of the illumination projection assembly.

[0199] It should be noted that the projection pattern of the illumination projection assembly provided by the present application is only exemplary, and the projection pattern can be changed as needed, and can be various automobile brand logos, traffic signs, characters, numbers, letters, etc.

[0200] The present application is described by preferred embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the application. The application is not limited by the specific embodiments disclosed herein, and other embodiments falling within the scope of the claims of the present application are within the scope of the application.

Claims

1. An illumination projection assembly, comprising an illumination assembly for focusing light from a light source, an imaging assembly for adjusting the field of view of the light image, and a housing; the imaging assembly is composed of a first lens, a second lens, a third lens, and a fourth lens, and the imaging assembly and the illumination assembly are sequentially mounted within the housing from the object side to the image side; characterized in that, The imaging assembly includes, sequentially from the image side to the object side: a first lens with negative optical power, the image side of which is convex 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 concave object-side surface near the optical axis. The imaging component satisfies the following condition: 0.150 <tanSemi-Fov×[f / (f2+f3)]<0.349; Wherein, Semi-Fov is half of the maximum field of view of the imaging component, f is the total effective focal length of the imaging component, f2 is the effective focal length of the second lens, and f3 is the effective focal length of the third lens; The imaging component satisfies the following condition: 0.894 <CT3 / (SAG31+SAG32)<6.167; Wherein, SAG31 is the distance on the optical axis from the intersection of the image-side surface of the third lens and the optical axis to the vertex of the effective radius of the image-side surface of the third 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; and CT3 is the center thickness of the third lens on the optical axis. The imaging component satisfies the following condition: -11.542<(R41+R42) / f4<-1.518; Wherein, R41 is the radius of curvature of the image side of the fourth lens, R42 is the radius of curvature of the object side of the fourth lens, and f4 is the effective focal length of the fourth lens.

2. The lighting projection assembly according to claim 1, characterized in that, The imaging component satisfies the following condition: -1.065 <f1 / f12<-0.357; Where f1 is the effective focal length of the first lens, and f12 is the combined focal length of the first lens and the second lens.

3. The lighting projection assembly according to claim 2, characterized in that, The imaging component satisfies the following condition: 0.085 <SAG11 / DT11<0.174; Wherein, 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; DT11 is the maximum effective radius of the image-side surface of the first lens.

4. The lighting projection assembly according to claim 3, characterized in that, The imaging component satisfies the following condition: 3.216<(DT41+DT42) / CT4<6.450; Wherein, DT41 is the maximum effective radius of the image side of the fourth lens; DT42 is the maximum effective radius of the object side of the fourth lens; and CT4 is the center thickness of the fourth lens on the optical axis.

5. The lighting projection assembly according to claim 3 or 4, characterized in that, The imaging component satisfies the following condition: 2.173 <TTL / (CT2+CT3)<2.800; Wherein, TTL is the distance on the optical axis from the image side of the first lens to the object side of the imaging component, 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.

6. The lighting projection assembly according to any one of claims 1 to 5, characterized in that, The imaging component satisfies the following condition: 2.540 <TTL / ImgH<3.083; Where TTL is the distance on the optical axis from the image side of the first lens to the object side of the imaging component, and ImgH is the maximum image height of the imaging component.

7. The lighting projection assembly according to claim 6, characterized in that: The lighting assembly includes a fifth lens and a sixth lens; The fifth lens and the sixth lens are installed sequentially from the object side to the image side inside the housing, with the sixth lens located on the object side of the fifth lens.

8. A welcome light, characterized in that, Includes the lighting projection assembly as described in any one of claims 1 to 7.

Images