An exterior mirror welcome light optical system, mechanical packaging assembly, power control system, imaging control method

Abstract

The application discloses a kind of outside rearview mirror welcome light optical system, mechanical package assembly, power control system, imaging control method, the welcome light of the present application has larger imaging area, the maximum imaging area radius on ground is 1.192m, the lens F number of system is 2.0, field angle is 50 °, field curvature value is less than 0.08mm, the full field of view at 1 / 2 Nyquist frequency is 0.7, system performance is superior;The outside rearview mirror welcome light system does not adopt the traditional film design, but selects the more advanced DMD chip system, the system can be directly connected to vehicle computer, and the user can directly select target picture on vehicle computer, convenient and fast.The welcome light system is designed on outside rearview mirror, can overcome the problem that imaging area is limited when traditional welcome light is installed in door position, service life is shorter, and imaging effect can be more ideal by adjusting the light intensity of LED lamp.

Description

Technical Field

[0001] This invention relates to the field of automotive lighting technology, and more specifically, to an external rearview mirror welcome light optical system, mechanical packaging components, power control system, and imaging control method. Background Technology

[0002] In recent years, with the continuous development of automotive intelligence, some automakers have begun to design welcome lights as an interactive device. For example, by installing sensors and electronic equipment, welcome lights can recognize car owners and display welcome messages. Furthermore, some automakers have started to use welcome lights as a brand promotion tool, designing them as a unique visual element to attract consumers' attention and enhance the brand value of their products. Car welcome lights are a new type of green light source for vehicles and have broad market prospects. Welcome lights can project text, patterns, or other designs; their novel and unique designs have made them popular. Car welcome lights not only illuminate the ground but also enhance the car's perceived quality, making it appear more upscale.

[0003] Most welcome light designs on the market use a combination of light source, lens, and film. Film is a commonly used type of film, and its working principle is similar to that of a photographic negative; when light shines on the film, an image is projected. Traditional welcome lights can only project a single image, failing to meet users' personalized needs. In recent years, new structural designs have emerged that allow the film to rotate with a mechanical structure, thus transmitting multiple images. However, this structural design is overly complex and limits the number of images, failing to perfectly meet customer requirements.

[0004] Traditional welcome lights are typically installed on the car doors. When the door is opened, the welcome light located at the bottom of the door automatically illuminates the area next to the door. However, because water can easily get into the bottom of the door, this often affects the normal operation of the door welcome lights and shortens their lifespan. Some vehicles directly install the door welcome lights at the bottom of the rearview mirror. Since the rearview mirror is generally 1 meter from the ground, the illumination brightness cannot be guaranteed, and the lighting effect is not ideal. In addition, the disadvantage of exterior rearview mirror welcome lights is that the imaging area is small, which cannot meet people's needs. Summary of the Invention

[0005] This invention provides an exterior rearview mirror welcome light system to solve the problems of small illumination area, limited pattern selection, insufficient imaging brightness, and short service life of existing exterior rearview mirror welcome lights.

[0006] To achieve the above-mentioned objective, a rearview mirror welcome light system is provided, the welcome light system comprising:

[0007] Power control system, optical system lens assembly, and mechanical packaging assembly.

[0008] The power control system includes an LED lamp driver circuit, a DMD chip, and an image generation system.

[0009] Optical system lens assembly, including illumination lens and imaging lens.

[0010] The illumination lens includes:

[0011] First lens, second lens and third lens, first aperture stop.

[0012] Imaging lenses include:

[0013] The fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens, the tenth lens, the second aperture stop, the eleventh lens, the twelfth lens, the thirteenth lens, the fourteenth lens, the fifteenth lens, and the sixteenth lens.

[0014] The size of the first aperture stop can be adjusted arbitrarily, and the adjustment range is... arrive The size of the second aperture stop is fixed, and its size is... .

[0015] The mechanical packaging assembly uses 6063 aluminum alloy as the packaging shell, as shown in the attached document. Figure 1 As shown, 6063 aluminum alloy spacers are used to determine the relative positions of each lens. The relative positions of the lenses are as follows:

[0016] Ensure the distance between the first lens and the second lens is The distance between the second and third lenses is The distance between the third and fourth lenses is The distance between the fourth and fifth lenses is The distance between the fifth and sixth lenses is The distance between the sixth and seventh lenses is The distance between the seventh and eighth lenses is The distance between the eighth and ninth lenses is The distance between the ninth and tenth lenses is The distance between the tenth and eleventh lenses is The distance between the eleventh and twelfth lenses is The distance between the twelfth and thirteenth lenses is The distance between the thirteenth and fourteenth lenses is The distance between the fourteenth and fifteenth lenses is The distance between the fifteenth and sixteenth lenses is The two ends of the lens barrel are fixed with glue to secure the entire lens assembly inside the lens barrel.

[0017] In addition, the radius of curvature of the object side surface of the first lens The radius of curvature of the image side surface of the first lens It satisfies the following relation:

[0018] .

[0019] In addition, the radius of curvature of the object side surface of the second lens The radius of curvature of the image side surface of the second lens It satisfies the following relation:

[0020] .

[0021] Additionally, the radius of curvature of the object-side surface of the third lens The radius of curvature of the image side surface of the third lens It satisfies the following relation:

[0022] .

[0023] In addition, the radius of curvature of the object side surface of the fourth lens The radius of curvature of the image side surface of the fourth lens It satisfies the following relation:

[0024] .

[0025] In addition, the radius of curvature of the object side surface of the fifth lens The radius of curvature of the image side surface of the fifth lens It satisfies the following relation:

[0026] .

[0027] Additionally, the radius of curvature of the object-side surface of the sixth lens The radius of curvature of the image side surface of the sixth lens It satisfies the following relation:

[0028] .

[0029] In addition, the radius of curvature of the object side surface of the seventh lens The radius of curvature of the image side surface of the seventh lens It satisfies the following relation:

[0030] .

[0031] In addition, the radius of curvature of the object side surface of the eighth lens The radius of curvature of the image side surface of the eighth lens It satisfies the following relation:

[0032] .

[0033] In addition, the radius of curvature of the object side surface of the ninth lens The radius of curvature of the image side surface of the ninth lens It satisfies the following relation:

[0034] .

[0035] Additionally, the radius of curvature of the object side surface of the tenth lens The radius of curvature of the image side surface of the tenth lens It satisfies the following relation:

[0036] .

[0037] In addition, the radius of curvature of the object side surface of the eleventh lens The radius of curvature of the image side surface of the eleventh lens It satisfies the following relation:

[0038] .

[0039] Additionally, the radius of curvature of the object side surface of the twelfth lens The radius of curvature of the image side surface of the twelfth lens It satisfies the following relation:

[0040] 0.2 .

[0041] In addition, the radius of curvature of the object side surface of the thirteenth lens The radius of curvature of the image side surface of the thirteenth lens It satisfies the following relation:

[0042] .

[0043] Additionally, the radius of curvature of the object side surface of the fourteenth lens The radius of curvature of the image side surface of the fourteenth lens It satisfies the following relation:

[0044] .

[0045] In addition, the radius of curvature of the object side surface of the fifteenth lens The radius of curvature of the image side surface of the fifteenth lens It satisfies the following relation:

[0046] .

[0047] Additionally, the radius of curvature of the object side surface of the sixteenth lens The radius of curvature of the image side surface of the sixteenth lens It satisfies the following relation:

[0048] .

[0049] The types of lenses are as follows:

[0050] The first lens is a convex lunar lens, the second lens is a concave lunar lens, the third lens is a concave lunar lens, the fourth lens is a concave lunar lens, the fifth lens is a biconvex lens, the sixth lens is a biconcave lens, the seventh lens is a biconvex lens, the eighth lens is a plano-convex lens, the ninth lens is a plano-concave lens, the tenth lens is a biconvex lens, the eleventh lens is a concave lunar lens, the twelfth lens is a biconvex lens, the thirteenth lens is a biconcave lens, the fourteenth lens is a concave lunar lens, the fifteenth lens is a concave lunar lens, and the sixteenth lens is a concave lunar lens.

[0051] The focal lengths of each lens are:

[0052] The focal length of the first lens is The focal length of the second lens is The focal length of the third lens is The focal length of the fourth lens is The focal length of the fifth lens is The focal length of the sixth lens is The focal length of the seventh lens is The focal length of the eighth lens is The focal length of the ninth lens is The focal length of the tenth lens is The focal length of the eleventh lens is The focal length of the twelfth lens is The focal length of the thirteenth lens is The focal length of the fourteenth lens is The focal length of the fifteenth lens is The focal length of the sixteenth lens is .

[0053] The center thickness of each lens is:

[0054] The center thickness of the first lens The center thickness of the second lens The center thickness of the third lens The center thickness of the fourth lens The center thickness of the fifth lens The center thickness of the sixth lens The center thickness of the seventh lens The center thickness of the eighth lens The center thickness of the ninth lens The center thickness of the tenth lens The center thickness of the eleventh lens The center thickness of the twelfth lens The center thickness of the thirteenth lens The center thickness of the fourteenth lens The center thickness of the fifteenth lens The center thickness of the sixteenth lens .

[0055] The refractive index and dispersion coefficient of each lens are:

[0056] The refractive index of the first lens Dispersion coefficient ;

[0057] The refractive index of the second lens Dispersion coefficient ;

[0058] The refractive index of the third lens Dispersion coefficient ;

[0059] The refractive index of the fourth lens Dispersion coefficient ;

[0060] The refractive index of the fifth lens Dispersion coefficient ;

[0061] The refractive index of the sixth lens Dispersion coefficient ;

[0062] The refractive index of the seventh lens Dispersion coefficient ;

[0063] The refractive index of the eighth lens Dispersion coefficient ;

[0064] The refractive index of the ninth lens Dispersion coefficient ;

[0065] The refractive index of the tenth lens Dispersion coefficient ;

[0066] The refractive index of the eleventh lens Dispersion coefficient ;

[0067] The refractive index of the twelfth lens Dispersion coefficient ;

[0068] The refractive index of the thirteenth lens Dispersion coefficient ;

[0069] The refractive index of the fourteenth lens Dispersion coefficient ;

[0070] The refractive index of the fifteenth lens Dispersion coefficient ;

[0071] The refractive index of the sixteenth lens Dispersion coefficient .

[0072] The lens materials are manufactured by Chengdu Guangming Optical Components Co., Ltd., China. The lens materials are as follows:

[0073] The glass material of the first lens is HZBAF5, the glass material of the second lens is QF50, the glass material of the third lens is HLAF3, the glass material of the fourth lens is DZF10, the glass material of the fifth lens is HLAK67, the glass material of the sixth lens is ZF50, the glass material of the seventh lens is HLAK67, the glass material of the eighth lens is HZK10L, the glass material of the ninth lens is ZF11, the glass material of the tenth lens is HLAF3A, the glass material of the eleventh lens is HKF6, the glass material of the twelfth lens is DLAF79, the glass material of the thirteenth lens is HQK3L, the glass material of the fourteenth lens is HK5, the glass material of the fifteenth lens is HQK3L, and the glass material of the sixteenth lens is HQK3L.

[0074] The beneficial effects of this invention are:

[0075] (1) It has a large imaging area, with a maximum imaging area radius of 1.192m on the ground. In addition, users can adjust the size of the first aperture stop to change the imaging area according to their personal needs.

[0076] (2) The system has a lens F number of 2.0, a field of view of 50°, a field curvature of less than 0.08 mm, and a full field of view of 0.7 at 1 / 2 Nyquist frequency. The system has excellent performance.

[0077] (2) The exterior rearview mirror welcome light system does not use the traditional film design, but instead uses a more advanced DMD chip system. This system can be directly connected to the vehicle computer, and users can directly select the target image on the vehicle computer, which is convenient and fast.

[0078] (3) The present invention uses a two-switch electrolytic capacitor-free LED driving circuit. Compared with the traditional electrolytic capacitor-free LED driving circuit, the two-switch electrolytic capacitor-free LED driving circuit has fewer switching devices and a simpler control strategy.

[0079] (4) The welcome light system is designed on the exterior rearview mirror, which can overcome the problems of limited imaging area and short lifespan when the traditional welcome light is installed at the door position. Moreover, the imaging effect can be more ideal by adjusting the light intensity of the LED light. Attached Figure Description

[0080] Figure 1 This is a schematic diagram of the entire welcome light system.

[0081] Figure 2 This is a schematic diagram of the LED driver circuit.

[0082] Figure 3 This is the field curvature diagram of the imaging lens;

[0083] Figure 4 This is a dot diagram of the imaging lens;

[0084] Figure 5 The MTF plot of the imaging lens;

[0085] Figure 6 This is a diagram showing the ray aberration curves of the imaging lens;

[0086] Figure 7 The distortion curve of the imaging lens;

[0087] Figure 8 This is a graph showing the OPD aberration of the imaging lens.

[0088] Figure 1 The lenses are labeled as follows: first lens 1, second lens 2, third lens 3, fourth lens 4, fifth lens 5, sixth lens 6, seventh lens 7, eighth lens 8, ninth lens 9, tenth lens 10, eleventh lens 11, twelfth lens 12, thirteenth lens 13, fourteenth lens 14, fifteenth lens 15, sixteenth lens 16, power control system 17, mechanical components 18, DMD chip system 19, lens fixing device 20, first aperture stop 21, and second aperture stop 22. Detailed Implementation

[0089] The invention will now be further described with reference to the accompanying drawings.

[0090] like Figure 1 As shown, the present invention provides a rearview mirror welcome light system, the welcome light system comprising: a power control system, an optical system lens assembly, and a mechanical packaging assembly; wherein:

[0091] The power control system includes an LED driver circuit, a DMD chip, and an image generator. The LED driver circuit consists of a flyback circuit and auxiliary circuitry, as shown in the attached diagram. Figure 2 As shown. The Flyback circuit consists of rectifier bridge B and input filter capacitor. The circuit consists of a primary diode D1, a transformer T, MOSFETs Q1 and Q2, a secondary diode D4, an output filter capacitor C0, and an LED load, used to implement PFC function and constant current output; the auxiliary circuit consists of an auxiliary energy storage capacitor. It consists of MOSFETs Q1 and Q2, and auxiliary diodes D2 and D3, used to balance the pulsating power difference between instantaneous input power and output power.

[0092] In this system, the on-board computer sends data to the image generator, which then transmits the data electrical signals to the LED light driver circuit. The LED light driver circuit converts the electrical signals into light signals, which are subsequently displayed on the DMD chip.

[0093] The lens assembly is described in detail below:

[0094] The types of lenses are as follows:

[0095] The first lens is a convex lunar lens, the second lens is a concave lunar lens, the third lens is a concave lunar lens, the fourth lens is a concave lunar lens, the fifth lens is a biconvex lens, the sixth lens is a biconcave lens, the seventh lens is a biconvex lens, the eighth lens is a plano-convex lens, the ninth lens is a plano-concave lens, the tenth lens is a biconvex lens, the eleventh lens is a concave lunar lens, the twelfth lens is a biconvex lens, the thirteenth lens is a biconcave lens, the fourteenth lens is a concave lunar lens, the fifteenth lens is a concave lunar lens, and the sixtieth lens is a concave lunar lens.

[0096] The focal lengths of each lens are:

[0097] The focal length of the first lens is The focal length of the second lens is The focal length of the third lens is The focal length of the fourth lens is The focal length of the fifth lens is The focal length of the sixth lens is The focal length of the seventh lens is The focal length of the eighth lens is The focal length of the ninth lens is The focal length of the tenth lens is The focal length of the eleventh lens is The focal length of the twelfth lens is The focal length of the thirteenth lens is The focal length of the fourteenth lens is The focal length of the fifteenth lens is The focal length of the sixteenth lens is .

[0098] The center thickness of each lens is:

[0099] The center thickness of the first lens The center thickness of the second lens The center thickness of the third lens The center thickness of the fourth lens The center thickness of the fifth lens The center thickness of the sixth lens The center thickness of the seventh lens The center thickness of the eighth lens The center thickness of the ninth lens The center thickness of the tenth lens The center thickness of the eleventh lens The center thickness of the twelfth lens The center thickness of the thirteenth lens The center thickness of the fourteenth lens The center thickness of the fifteenth lens The center thickness of the sixteenth lens .

[0100] The refractive index and dispersion coefficient of each lens are:

[0101] The refractive index of the first lens Dispersion coefficient ;

[0102] The refractive index of the second lens Dispersion coefficient ;

[0103] The refractive index of the third lens Dispersion coefficient ;

[0104] The refractive index of the fourth lens Dispersion coefficient ;

[0105] The refractive index of the fifth lens Dispersion coefficient ;

[0106] The refractive index of the sixth lens Dispersion coefficient ;

[0107] The refractive index of the seventh lens Dispersion coefficient ;

[0108] The refractive index of the eighth lens Dispersion coefficient ;

[0109] The refractive index of the ninth lens Dispersion coefficient ;

[0110] The refractive index of the tenth lens Dispersion coefficient ;

[0111] The refractive index of the eleventh lens Dispersion coefficient ;

[0112] The refractive index of the twelfth lens Dispersion coefficient ;

[0113] The refractive index of the thirteenth lens Dispersion coefficient ;

[0114] The refractive index of the fourteenth lens Dispersion coefficient ;

[0115] The refractive index of the fifteenth lens Dispersion coefficient ;

[0116] The refractive index of the sixteenth lens Dispersion coefficient .

[0117] The lens materials are manufactured by Chengdu Guangming Optical Components Co., Ltd., China. The lens materials are as follows:

[0118] The glass material of the first lens is HZBAF5, the glass material of the second lens is QF50, the glass material of the third lens is HLAF3, the glass material of the fourth lens is DZF10, the glass material of the fifth lens is HLAK67, the glass material of the sixth lens is ZF50, the glass material of the seventh lens is HLAK67, the glass material of the eighth lens is HZK10L, the glass material of the ninth lens is ZF11, the glass material of the tenth lens is HLAF3A, the glass material of the eleventh lens is HKF6, the glass material of the twelfth lens is DLAF79, the glass material of the thirteenth lens is HQK3L, the glass material of the fourteenth lens is HK5, the glass material of the fifteenth lens is HQK3L, and the glass material of the sixteenth lens is HQK3L.

[0119] The specific parameters of the optical system are shown in Table 1:

[0120] Table 1

[0121] Surface type Y radius thickness Glass surface spherical unlimited unlimited 1 spherical 11.8971 4.868 HZBAF5 2 spherical 50.1135 3.836 3 spherical -28.5104 4.000 QF50 4 spherical 87.0770 4.778 5 spherical 9.1658 4.750 HLAF3 6 spherical 36.4668 4.350 7 spherical unlimited 5.401 8 spherical 59.4980 2.000 DZF10 9 spherical 13.7449 0.749 10 spherical 19.4152 3.051 HLAK67 11 spherical -10.7125 3.165 12 spherical -24.7162 2.000 ZF50 13 spherical 25.8652 0.951 14 spherical 17.5571 2.286 HLAK67 15 spherical -15.5651 0.100 16 spherical 12.7702 2.083 HZK10L 17 spherical 84.2434 0.100 18 spherical -174.7493 1.000 ZF11 19 spherical 10.3349 0.136 20 spherical unlimited 1.532 21 spherical 19.5332 2.153 HLAF3A 22 spherical -22.4679 1.260 23 spherical -10.4665 2.000 HKF6 24 spherical -56.5071 21.026 25 spherical 42.8206 5.088 DLAF79 26 spherical -23.7416 1.238 27 spherical -22.1820 2.000 HQK3L 28 spherical 32.6760 5.256 29 spherical -13.4643 1.000 HK5 30 spherical -18.7512 2.109 31 spherical -12.6899 0.415 32 spherical -12.1402 1.279 HQK3L 33 spherical -23.5162 6.227 34 spherical -12.5345 2.000 HQK3L 35 spherical -25.5942 1000.000 Image spherical unlimited 0.000

[0122] The working principle and process of the rearview mirror welcome light system's imaging control are as follows: When the LED power switch is turned on in the power control system, light is emitted from the LED light, passing sequentially through the illumination lens, DMD chip, and imaging lens, projecting the image on the DMD chip onto the ground 1 meter away. To adjust the projection area, the size of the first aperture stop is adjusted, and the image size on the DMD chip is matched on the vehicle's computer, thus changing the projection area. To achieve different imaging effects, the illumination intensity of the LED light is adjusted.

[0123] The projection effect of this system is excellent. The following is an analysis of the lens's imaging effect:

[0124] Field curvature refers to the deviation between the position of the image formed by a lens or mirror after refraction or reflection of an object at different positions and its image position at infinity. The field curvature curve of this lens is shown in the attached figure. Figure 3 As shown, the field curvature value does not exceed a certain value within the entire projection range. .

[0125] Each point in the dot plot represents the position of the object in front of the lens, corresponding to a set of rays in the lens group. After these rays pass through the lens group, the dot plot shows their image positions on the image plane. A dot plot is attached. Figure 4 As shown, the root mean square radius (RMS) values ​​are respectively , and .

[0126] An MTF (Modulation Transfer Function) diagram is a graph of the modulation transfer function of a lens, used to display the contrast transmitted by the lens or mirror at different spatial frequencies. The lens's MTF diagram is attached. Figure 5 As shown, this lens has high contrast and resolution.

[0127] A ray aberration diagram can show the deviation of a lens or mirror in forming light rays at different positions and angles. A ray aberration diagram is attached. Figure 6 As shown, the aberration value of the system does not exceed 0.00761.

[0128] Distortion refers to the phenomenon where, when a lens images an object, the shape of the image is distorted due to factors such as the lens's shape, position, and refractive index. A distortion curve is attached. Figure 7 As shown, the distortion value of this system at the maximum field of view is .

[0129] Optical path difference (OPD) refers to the optical path difference between two rays from an object to its image surface. It is an important parameter for evaluating the image quality of a lens or mirror. An OPD aberration diagram shows the distribution of this optical path difference across the lens or mirror surface. (See attached OPD aberration diagram.) Figure 8 As shown, the OPD aberration value of this system does not exceed 1.617.

[0130] The mechanical components use 6063 aluminum alloy as the enclosure, with internal 6063 aluminum alloy spacers determining the relative positions of each lens element. A reflective material is coated inside the lens to enhance light transmission.

[0131] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent methods or modifications that do not depart from the technology of the present invention should be included within the scope of protection of the present invention.

Claims

1. An external rearview mirror welcome light optical system, characterized in that, Includes illumination lenses and imaging lenses; The illumination lens includes: a first lens, a second lens, and a third lens, and a first aperture stop; The imaging lenses include: a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, a second aperture stop, an eleventh lens, a twelfth lens, a thirteenth lens, a fourteenth lens, a fifteenth lens, and a sixteenth lens; The first lens is a convex lunar lens, the second lens is a concave lunar lens, the third lens is a concave lunar lens, the fourth lens is a concave lunar lens, the fifth lens is a biconvex lens, the sixth lens is a biconcave lens, the seventh lens is a biconvex lens, the eighth lens is a plano-convex lens, the ninth lens is a plano-concave lens, the tenth lens is a biconvex lens, the eleventh lens is a concave lunar lens, the twelfth lens is a biconvex lens, the thirteenth lens is a biconcave lens, the fourteenth lens is a concave lunar lens, the fifteenth lens is a concave lunar lens, and the sixteenth lens is a concave lunar lens. The radius of curvature of the object side surface of the first lens The radius of curvature of the image side surface of the first lens It satisfies the following relation: ； The radius of curvature of the object side surface of the second lens The radius of curvature of the image side surface of the second lens It satisfies the following relation: ； The radius of curvature of the object-side surface of the third lens The radius of curvature of the image side surface of the third lens It satisfies the following relation: ； The radius of curvature of the object side surface of the fourth lens The radius of curvature of the image side surface of the fourth lens It satisfies the following relation: ； The radius of curvature of the object-side surface of the fifth lens The radius of curvature of the image side surface of the fifth lens It satisfies the following relation: ； The radius of curvature of the object-side surface of the sixth lens The radius of curvature of the image side surface of the sixth lens It satisfies the following relation: The radius of curvature of the object-side surface of the seventh lens The radius of curvature of the image side surface of the seventh lens It satisfies the following relation: The radius of curvature of the object-side surface of the eighth lens The radius of curvature of the image side surface of the eighth lens It satisfies the following relation: The radius of curvature of the object-side surface of the ninth lens The radius of curvature of the image side surface of the ninth lens It satisfies the following relation: The radius of curvature of the object surface of the tenth lens The radius of curvature of the image side surface of the tenth lens It satisfies the following relation: The radius of curvature of the object surface of the eleventh lens The radius of curvature of the image side surface of the eleventh lens It satisfies the following relation: The radius of curvature of the object surface of the twelfth lens The radius of curvature of the image side surface of the twelfth lens It satisfies the following relation: 0.2 The radius of curvature of the object surface of the thirteenth lens The radius of curvature of the image side surface of the thirteenth lens It satisfies the following relation: The radius of curvature of the object surface of the fourteenth lens The radius of curvature of the image side surface of the fourteenth lens It satisfies the following relation: The radius of curvature of the object surface of the fifteenth lens The radius of curvature of the image side surface of the fifteenth lens It satisfies the following relation: The radius of curvature of the object surface of the sixteenth lens The radius of curvature of the image side surface of the sixteenth lens It satisfies the following relation: 。 2. The rearview mirror welcome light optical system according to claim 1, characterized in that, The focal lengths of each lens are: The focal length of the first lens is The focal length of the second lens is The focal length of the third lens is The focal length of the fourth lens is The focal length of the fifth lens is The focal length of the sixth lens is The focal length of the seventh lens is The focal length of the eighth lens is The focal length of the ninth lens is The focal length of the tenth lens is The focal length of the eleventh lens is The focal length of the twelfth lens is The focal length of the thirteenth lens is The focal length of the fourteenth lens is The focal length of the fifteenth lens is The focal length of the sixteenth lens is .

3. The exterior rearview mirror welcome light optical system according to claim 1, characterized in that, The center thickness of each lens is: The center thickness of the first lens The center thickness of the second lens The center thickness of the third lens The center thickness of the fourth lens The center thickness of the fifth lens The center thickness of the sixth lens The center thickness of the seventh lens The center thickness of the eighth lens The center thickness of the ninth lens The center thickness of the tenth lens The center thickness of the eleventh lens The center thickness of the twelfth lens The center thickness of the thirteenth lens The center thickness of the fourteenth lens The center thickness of the fifteenth lens The center thickness of the sixteenth lens .

4. The rearview mirror welcome light optical system according to claim 1, characterized in that, The refractive index and dispersion coefficient of each lens are: The refractive index of the first lens Dispersion coefficient ; The refractive index of the second lens Dispersion coefficient ; The refractive index of the third lens Dispersion coefficient ; The refractive index of the fourth lens Dispersion coefficient ; The refractive index of the fifth lens Dispersion coefficient ; The refractive index of the sixth lens Dispersion coefficient ; The refractive index of the seventh lens Dispersion coefficient ; The refractive index of the eighth lens Dispersion coefficient ; The refractive index of the ninth lens Dispersion coefficient ; The refractive index of the tenth lens Dispersion coefficient ; The refractive index of the eleventh lens Dispersion coefficient ; The refractive index of the twelfth lens Dispersion coefficient ; The refractive index of the thirteenth lens Dispersion coefficient ; The refractive index of the fourteenth lens Dispersion coefficient ; The refractive index of the fifteenth lens Dispersion coefficient ; The refractive index of the sixteenth lens Dispersion coefficient .

5. The rearview mirror welcome light optical system according to claim 1, characterized in that, The materials of each lens are: The glass material of the first lens is HZBAF5, the glass material of the second lens is QF50, the glass material of the third lens is HLAF3, the glass material of the fourth lens is DZF10, the glass material of the fifth lens is HLAK67, the glass material of the sixth lens is ZF50, the glass material of the seventh lens is HLAK67, the glass material of the eighth lens is HZK10L, the glass material of the ninth lens is ZF11, the glass material of the tenth lens is HLAF3A, the glass material of the eleventh lens is HKF6, the glass material of the twelfth lens is DLAF79, the glass material of the thirteenth lens is HQK3L, the glass material of the fourteenth lens is HK5, the glass material of the fifteenth lens is HQK3L, and the glass material of the sixteenth lens is HQK3L.

6. The rearview mirror welcome light optical system according to claim 1, characterized in that, The size of the first aperture stop can be adjusted arbitrarily, and the adjustment range is... arrive The size of the second aperture stop is fixed and is [size missing]. .

7. A mechanical packaging assembly for an exterior rearview mirror welcome light optical system according to any one of claims 1-6, characterized in that, The lens barrel is made of aluminum alloy, and the lenses are fixed inside the barrel using aluminum alloy spacers. The ends of the lens barrel are secured with glue, thus fixing the entire lens assembly inside the barrel. The relative positions of the lenses are as follows: The distance between the first lens and the second lens is The distance between the second lens and the third lens is The distance between the third lens and the fourth lens is The distance between the fourth lens and the fifth lens is The distance between the fifth lens and the sixth lens is The distance between the sixth and seventh lenses is The distance between the seventh lens and the eighth lens is The distance between the eighth lens and the ninth lens is The distance between the ninth lens and the tenth lens is The distance between the tenth lens and the eleventh lens is The distance between the eleventh lens and the twelfth lens is The distance between the twelfth and thirteenth lenses is The distance between the thirteenth lens and the fourteenth lens is The distance between the fourteenth lens and the fifteenth lens is The distance between the fifteenth lens and the sixteenth lens is .

8. A power control system for an exterior rearview mirror welcome light optical system according to any one of claims 1-6, characterized in that, It includes an LED driver circuit, a DMD chip, and an image generator; the LED driver circuit consists of a flyback circuit and auxiliary circuitry, wherein the flyback circuit comprises a rectifier bridge B and an input filter capacitor. The circuit consists of a primary diode D1, a transformer T, MOSFETs Q1 and Q2, a secondary diode D4, an output filter capacitor C0, and an LED load, used to implement PFC function and constant current output; the auxiliary circuit consists of an auxiliary energy storage capacitor. It consists of MOSFETs Q1 and Q2, and auxiliary diodes D2 and D3, used to balance the pulsating power difference between instantaneous input power and output power; The image generator receives data electrical signals and generates corresponding image information. The image generator transmits the image information to the LED light driving circuit, which converts the image electrical signals into light signals, which are emitted by the LED lights and imaged on the DMD chip.

9. An imaging control method for a rearview mirror welcome light based on the power control system of claim 8, characterized in that, In the power control system, turning on the LED power switch allows light to be emitted from the LED light, passing sequentially through the illumination lens, DMD chip, and imaging lens, projecting the image from the DMD chip onto the ground 1 meter away. To adjust the projection area, the size of the first aperture stop is adjusted, and the size of the image on the DMD chip is matched on the onboard computer, thus changing the projection area. To adjust the imaging effect, the illumination intensity of the LED light is adjusted, resulting in different imaging effects.

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