An ultra-large field-of-view vehicle head-up display optical system, mechanical packaging structure, and electronic circuit

Abstract

The present invention discloses an in-vehicle head-up display optical system with an ultra-large field of view, a mechanical packaging structure, and an electronic circuit. The optical system lens has the characteristics of an ultra-large field of view, augmented reality, structured light road surface recognition, excellent projection performance, and high portability. The projection area is 20 times that of an ordinary in-vehicle head-up display system. An interactive driving experience with full coverage of the car's front windshield can be achieved. The in-vehicle head-up display system is composed of an optical lens group, a structured light module, a mechanical packaging module, and an internal circuit module. The optical lens group is composed of an aperture, fifteen lenses, and a reflector. Light passes through the aperture, the lens group, and the reflector in sequence to present an image on the imaging surface. The lens group and the reflector are combined with each other to complete the projection of light. The optical lens group and other functional modules cooperate with each other to achieve an ultra-large projection field of view for the in-vehicle head-up display, and at the same time establish an assisted driving experience with large-field augmented reality.

Description

Technical Field

[0001] The present invention belongs to the technical field of optical system design and intelligent vehicle head-up display, and specifically relates to an intelligent vehicle head-up display optical system, a mechanical packaging structure and a circuit constructed with a reentrant optical system. Background Art

[0002] With the development of autonomous driving, intelligent assisted driving, artificial intelligence, and 5G communications, future cars will become integrated information platforms, and information display will be one of the most crucial components of this integrated platform. Head-up display (HUD) technology is one of the most attractive in-vehicle display solutions. A HUD is a system in which the vehicle's computer system displays information on an image source device. Light emitted by the image source device is projected onto the vehicle's windshield through an optical projection system composed of reflective and refracting optical elements. The light is then reflected off the windshield and enters the driver's eyes. The reflected light's reverse extension forms a virtual image in front of the vehicle's windshield, blending with the physical objects in front, thus realizing augmented reality (AR) information display technology. The driver can view various information displayed by the projection system through the windshield, including instrument cluster information, road information, vehicle network information, scene recognition and interaction, and more. Augmented reality head-up displays (AR HUDs) will be a future trend and focus.

[0003] The development of intelligent driving technology has resulted in drivers facing an increasing amount of information. HUD (Head-Up Display) is a technology that addresses information interaction and safe driving, and is a practical application of augmented reality (AR) imaging technology. HUD systems display road, vehicle, and social information on transparent glass or the windshield directly in the driver's field of view, preventing them from losing their sight of the road and improving safety. This is an inevitable trend in the development of intelligent vehicles. HUD systems must ensure that the projected information is clearly visible to the driver, ensuring that the position, color, brightness, and clarity of the projected graphics are distinguishable from the surrounding environment.

[0004] To achieve an effective interactive AR HUD, the projection system must create a large field of view (FOV) for the virtual image in front of the vehicle. For example, a full FOV exceeding 40° is required to achieve good display quality. However, the FOV of common HUDs currently available is generally only 5°-15°, far from meeting the requirements for AR HUD technology.

[0005] Currently, common HUDs utilize a single image source and a curved reflective design. Because there's a certain distance between the driver's eyes and the windshield, and between the windshield and the projection lens, the total distance from the driver's eyes to the projection lens is typically no less than 700 mm. Achieving a larger field of view, such as 30°, requires a reflective surface diameter of 808 mm. Furthermore, the presence of multiple off-axis reflective surfaces complicates system installation. Furthermore, since drivers are often mobile while driving, a specific eyebox is typically used to represent the driver's eyes, typically measuring 150 x 60 mm. This eyebox size determines the aperture of the projection system. A large aperture and wide field of view inevitably hinder image quality and limit the miniaturization of the projection lens. Therefore, achieving a large field of view is technically difficult with current automotive head-up display designs. This also results in a relatively small field of view for current HUD technology, typically under 15 degrees.

[0006] In summary, whether AR HUD can become a realistic intelligent assisted driving solution will largely depend on the successful development of large-field-of-view HUD projection technology. It is obviously extremely important to combine technological advances in related fields, explore new technical solutions, and realize large-field-of-view HUD. Summary of the Invention

[0007] The present invention provides an in-vehicle head-up display optical system that features ultra-wide angle, full coverage, and a compact size, offering superior display performance. Furthermore, with the aid of external algorithms, the in-vehicle head-up display can be equipped with panoramic augmented reality capabilities.

[0008] For a large field of view, the imaging field of view angle of the present invention can reach 40°. Compared with ordinary projection lenses (field of view angle ≈ 10°), the field of view width can reach 5 times that of ordinary head-up display lenses, and the field of view area can reach 20 times that of ordinary head-up display lenses. Figure 1 A schematic diagram of the field of view of the optical projection lens of the present invention is provided in FIG.

[0009] The use of single-lens imaging achieves an ultra-large field of view, which has higher overall completeness and more practical application significance compared to multi-lens splicing.

[0010] The following is the lens structure that constitutes a super large field of view. The basic structure of the optical lens is as follows: Figure 2 As shown:

[0011] This invention provides a solution for a compact, ultra-wide-angle projection lens. The optical system lens module comprises, from left to right, an object plane, first through fifteenth lenses, an aspherical reflector, and a receiving screen. The surface of the second lens facing the object plane is the aperture surface, and the image receiving screen of the projection lens module is the front windshield of a car.

[0012] The first lens is a parallel flat plate with a thickness of 9.500 mm, and the surface of the parallel flat plate is where the display chip (DMD) is placed;

[0013] The second lens is a meniscus lens, the object-side surface of which is convex and has a thickness of 0.960 mm;

[0014] The third lens is a meniscus lens, the object-side surface of which is convex and has a thickness of 8.420 mm;

[0015] The fourth lens is a meniscus lens, the object-side surface of which is concave and has a thickness of 1.034 mm;

[0016] The fifth lens is a biconvex lens with a thickness of 3.113 mm;

[0017] The sixth lens is a biconcave lens with a thickness of 0.950 mm;

[0018] The seventh lens is a biconvex lens with a thickness of 1.756 mm;

[0019] The eighth lens is a meniscus lens, the object-side surface of which is concave and has a thickness of 0.950 mm;

[0020] The ninth lens is a meniscus lens, the object-side surface of which is convex and has a thickness of 1.010 mm;

[0021] The tenth lens is a meniscus lens, the object-side surface of which is convex and has a thickness of 0.950 mm;

[0022] The eleventh lens is a biconvex lens with a thickness of 2.558 mm;

[0023] The twelfth lens is a biconcave lens with a thickness of 1.155 mm;

[0024] The thirteenth lens is a biconvex lens with a thickness of 2.621 mm;

[0025] The fourteenth lens is a meniscus lens, the surface facing the object side is convex, the surface away from the object side is aspherical, and the thickness is 0.950 mm;

[0026] The fifteenth lens is a biconvex lens, the surface away from the object plane is aspherical, and the thickness is 5.917 mm;

[0027] The sixteenth optical element is an aspheric reflector, which is used to reflect the light emitted from the object surface and shorten the overall length of the optical system.

[0028] Furthermore, the curvature radius of each mirror surface is as follows:

[0029] The first lens is a parallel flat plate, and the curvature radius of the front surface and the back surface of the first lens are both positive infinite;

[0030] The front surface radius of the second lens is 17.545 mm, and the rear surface radius is 19.693 mm;

[0031] The front surface radius of the third lens is 18.934 mm, and the rear surface radius is 21.960 mm;

[0032] The front surface radius of the fourth lens is -57.622 mm, and the rear surface radius is -23.611 mm;

[0033] The front surface radius of the fifth lens is 16.580 mm, and the rear surface radius is -44.326 mm;

[0034] The front surface radius of the sixth lens is -29.331 mm, and the rear surface radius is 21.447 mm;

[0035] The front surface radius of the seventh lens is 20.454 mm, and the rear surface radius is -9.878 mm;

[0036] The front surface radius of the eighth lens is -9.390 mm, and the rear surface radius is -117.911 mm;

[0037] The front surface radius of the ninth lens is 173.932 mm, and the rear surface radius is 291.207 mm;

[0038] The front surface radius of the tenth lens is 68.313 mm, and the rear surface radius is 29.940 mm;

[0039] The front surface radius of the eleventh lens is 61.995 mm, and the rear surface radius is -35.901 mm;

[0040] The front surface radius of the twelfth lens is -19.227 mm, and the rear surface radius is 131.397 mm;

[0041] The front surface radius of the thirteenth lens is 92.138 mm, and the rear surface radius is -42.563 mm;

[0042] The front surface radius of the fourteenth lens is 2024.218 mm, the back surface is an aspherical surface with a radius of 31.784 mm, the quadratic constant K is -3.711, the fourth-order coefficient A is -4.124e-007, the sixth-order coefficient B is -1.299e-010, the eighth-order coefficient C is -4.162-013, and the tenth-order coefficient D is -2.563e-016;

[0043] The front surface radius of the fifteenth lens is 372.955 mm, the rear surface is an aspherical surface with a radius of -40.471 mm, the quadratic constant K is 0.226, the fourth-order coefficient A is 4.184e-007, the sixth-order coefficient B is 5.353e-010, the eighth-order coefficient C is 1.176e-012, and the tenth-order coefficient D is 8.145e-015;

[0044] The reflector surface is an aspherical surface with a radius of -68.900 mm, a quadratic constant K of -0.281, a fourth-order coefficient A of 1.045e-006, a sixth-order coefficient B of -2.577e-010, an eighth-order coefficient C of -6.179e-014, and a tenth-order coefficient D of 5.011e-017;

[0045] In the above lenses, the first lens is a parallel flat plate with a focal length of positive infinity;

[0046] The second lens is a positive focal length lens with a focal length of 279.115068 mm;

[0047] The third lens is a positive focal length lens with a focal length of 112.058637 mm;

[0048] The fourth lens is a positive focal length lens with a focal length of 59.90589307 mm;

[0049] The fifth lens is a lens with a negative focal length, and its focal length is 25.11996502 mm;

[0050] The sixth lens is a positive focal length lens with a focal length of -16.36535949 mm;

[0051] The seventh lens is a lens with a negative focal length, and its focal length is 13.07237355 mm;

[0052] The eighth lens is a positive focal length lens with a focal length of -17.21138097 mm;

[0053] The ninth lens is a lens with a negative focal length, and its focal length is 694.5997172 mm;

[0054] The tenth lens is a positive focal length lens, and its focal length is -71.94384299 mm;

[0055] The eleventh lens is a lens with a negative focal length, and its focal length is 37.87939146 mm;

[0056] The twelfth lens is a positive focal length lens with a focal length of -27.01293006 mm;

[0057] The thirteenth lens is a positive focal length lens, and its focal length is 38.87649258 mm;

[0058] The fourteenth lens is a lens with a negative focal length, and its focal length is -53.32343863 mm;

[0059] The fifteenth lens is a positive focal length lens with a focal length of 56.9680566 mm;

[0060] Mirror 16 is a reflector with a radius of 176.814011 mm.

[0061] The display chip (DMD) of the head-up display system of the present invention uses a 0.47DMD display chip, which can perform 4K projection.

[0062] This lens module has good optical performance. The imaging effect of the lens is analyzed and the effect is as shown in the attached figure. Figures 3 to 7 As shown, it can be seen that the imaging quality is good and the vehicle-mounted head-up display device of the present invention has excellent optical performance.

[0063] The lenses of this lens module are made of glass and have good heat resistance.

[0064] Each lens in this lens module is made of glass and has a high transmittance.

[0065] The materials used for the above lenses are as follows:

[0066] The first lens is made of Chengdu Guangming (CDGM) glass with model HQF6;

[0067] The second lens is made of Chengdu Guangming (CDGM) glass with model HK5;

[0068] The third lens is made of Chengdu Guangming (CDGM) glass with model BAF7;

[0069] The fourth lens is made of Chengdu Guangming (CDGM) glass with model HZBAF3;

[0070] The fifth lens is made of Chengdu Guangming (CDGM) glass with model HQK3;

[0071] The sixth lens is made of Chengdu Guangming (CDGM) glass with model HZF11;

[0072] The seventh lens is made of Chengdu Guangming (CDGM) glass with model HK7;

[0073] The eighth lens is made of Chengdu Guangming (CDGM) glass with model HZK8;

[0074] The ninth lens is made of Chengdu Guangming (CDGM) glass with model ZBAF1;

[0075] The tenth lens is made of Chengdu Guangming (CDGM) glass with model HLAF4;

[0076] The eleventh lens is made of Chengdu Guangming (CDGM) glass with model HZK5;

[0077] The twelfth lens is made of Chengdu Guangming (CDGM) glass with model HZK9A;

[0078] The thirteenth lens is made of Chengdu Guangming (CDGM) glass with model HZF6;

[0079] The fourteenth lens is made of Chengdu Guangming (CDGM) glass with model HF1;

[0080] The fifteenth lens is made of Chengdu Guangming (CDGM) glass with model HZK11;

[0081] Furthermore, the optical lens of the head-up display system is mechanically packaged (see Figure 8 ) and carried out electronic circuit design. Among them, the mechanical packaging of the lens, due to the actual light path propagation needs, the lens structure within the lens module was modified to ensure smooth light path.

[0082] The electronic circuit design is divided into a data transmission circuit and an onboard DC power supply circuit. In the data transmission circuit, the processed data to be projected is processed by the data transmission circuit and information detection, amplification, and reception. The data panel is then presented to the object surface of the optical system. The optical system then projects the data onto the car's windshield, completing the information delivery.

[0083] The onboard DC power supply circuit (i.e., external circuit) provides power for the entire process. Its power supply circuit consists of a transistor, a sliding rheostat, and several resistors, forming a stable voltage output on the collector side to provide a stable voltage for the projection system.

[0084] The final packaging result shows the optomechanical structure of the vehicle head-up display in the form of a cross-section diagram. EVA resin is selected as the packaging material, and HT8705 UV curing adhesive is used for the optical lens. This optical lens fixing adhesive has the advantages of high temperature resistance, high light transmittance, and high refractive index. Figure 9 、 Figure 10 , the external circuit diagram of the head-up display system is as follows Figure 11 shown

[0085] Furthermore, based on this lens module, this head-up display optical system expands the structured light module, and the structured light detection effect diagram is shown in the attached figure. Figure 12As shown, the collected road information is sent to the processor for processing, which can realize the detection of obstacles that are difficult to find on the road surface and the function of assisting the driver to identify the road conditions when visibility is low at night.

[0086] Furthermore, based on this lens module, an augmented reality module is added to the head-up display device to project interactive information onto the front windshield of the car, and to display information such as navigation road conditions in real time on the real road.

[0087] Beneficial effects of the present invention:

[0088] (1) Large field of view. The present invention has an extremely large field of view. Compared with similar head-up display devices, the display area is 20 times that of existing devices. The large field of view is achieved by using a single lens rather than a spliced ​​lens, which provides better completeness.

[0089] (2) AR interaction. The ultra-large field of view provides the foundation for the application of augmented reality (AR). The display area, which almost covers the entire front windshield of the car, can be used to develop real-life in-car navigation, providing a good driving experience.

[0090] (3) Structured light road surface recognition. The system’s expanded structured light module can effectively identify obstacles that are difficult for the human eye to recognize and are similar in color to the road, and provide timely feedback to the driver to ensure driving safety.

[0091] (4) Real-time screen projection. The mobile phone interface is projected onto the car's front windshield in real time via a data cable, providing timely reminders of important messages. This reduces the safety risks of drivers operating their phones while driving.

[0092] (5) Highly portable. The design of the catadioptric optical lens effectively saves space in the vehicle. It is independently packaged and ready to be installed. It can also be independently produced. BRIEF DESCRIPTION OF THE DRAWINGS

[0093] Figure 1 A schematic diagram of the field of view of the present invention;

[0094] Figure 2 Schematic diagram of the basic structure of the lens;

[0095] Figure 3 This is a schematic diagram of lens field curvature;

[0096] Figure 4 Schematic diagram of lens light aberration curve;

[0097] Figure 5 Schematic diagram of lens distortion;

[0098] Figure 6 Schematic diagram of lens chromatic aberration;

[0099] Figure 7is the one-dimensional field of view of the lens;

[0100] Figure 8 This is a schematic diagram of the optical system packaging;

[0101] Figure 9 This is the lighting effect diagram of the vehicle head-up display system;

[0102] Figure 10 This is a cross-sectional diagram of the vehicle head-up display system;

[0103] Figure 11 This is a schematic diagram of the external circuit of the head-up display;

[0104] Figure 12 Schematic diagram of structured light detection during driving.

[0105] Figure 2 In the figures, the meanings of the reference numerals are as follows:

[0106] 1-first lens, 2-second lens, 3-third lens, 4-fourth lens, 5-fifth lens, 6-sixth lens, 7-seventh lens, 8-eighth lens, 9-ninth lens, 10-tenth lens, 11-eleventh lens, 12-twelfth lens, 13-thirteenth lens, 14-fourteenth lens, 15-fifteenth lens, 16-aspherical reflector. DETAILED DESCRIPTION

[0107] The present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0108] Figure 1 Schematic diagram of a lens provided in Example 1 of the present invention, wherein the lens is arranged from the object side to the image side as a first lens, a second lens, ..., to a sixteenth lens;

[0109] The first lens 1 is a parallel flat plate with a thickness of 9.500 mm. The surface of the parallel flat plate is where the display chip (DMD) is placed.

[0110] The second lens 2 is a meniscus lens, the surface of which facing the object side is convex and has a thickness of 0.960 mm;

[0111] The third lens 3 is a meniscus lens, the object-side surface of which is convex and has a thickness of 8.420 mm;

[0112] The fourth lens 4 is a meniscus lens, the surface of which facing the object side is concave, and the thickness is 1.034 mm;

[0113] The fifth lens 5 is a biconvex lens with a thickness of 3.113 mm;

[0114] The sixth lens 6 is a biconcave lens with a thickness of 0.950 mm;

[0115] The seventh lens 7 is a biconvex lens with a thickness of 1.756 mm;

[0116] The eighth lens 8 is a meniscus lens, the object-side surface of which is concave and has a thickness of 0.950 mm;

[0117] The ninth lens 9 is a meniscus lens, the object-side surface of which is convex and has a thickness of 1.010 mm;

[0118] The tenth lens 10 is a meniscus lens, the object-side surface of which is convex and has a thickness of 0.950 mm;

[0119] The eleventh lens 11 is a biconvex lens with a thickness of 2.558 mm;

[0120] The twelfth lens 12 is a biconcave lens with a thickness of 1.155 mm;

[0121] The thirteenth lens 13 is a biconvex lens with a thickness of 2.621 mm;

[0122] The fourteenth lens 14 is a meniscus lens, the surface facing the object side is convex, the surface away from the object side is aspherical, and the thickness is 0.950 mm;

[0123] The fifteenth lens 15 is a biconvex lens, the surface away from the object plane is aspherical, and the thickness is 5.917 mm;

[0124] The sixteenth optical element is an aspheric reflector 16, which is used to reflect the light emitted from the object surface to shorten the overall length of the optical system.

[0125] Furthermore, the curvature radius of each mirror surface is as follows:

[0126] The first lens is a parallel flat plate, and the curvature radius of the front surface and the back surface of the first lens are both positive infinite;

[0127] The front surface radius of the second lens is 17.545 mm, and the rear surface radius is 19.693 mm;

[0128] The front surface radius of the third lens is 18.934 mm, and the rear surface radius is 21.960 mm;

[0129] The front surface radius of the fourth lens is -57.622 mm, and the rear surface radius is -23.611 mm;

[0130] The front surface radius of the fifth lens is 16.580 mm, and the rear surface radius is -44.326 mm;

[0131] The front surface radius of the sixth lens is -29.331 mm, and the rear surface radius is 21.447 mm;

[0132] The front surface radius of the seventh lens is 20.454 mm, and the rear surface radius is -9.878 mm;

[0133] The front surface radius of the eighth lens is -9.390 mm, and the rear surface radius is -117.911 mm;

[0134] The front surface radius of the ninth lens is 173.932 mm, and the rear surface radius is 291.207 mm;

[0135] The front surface radius of the tenth lens is 68.313 mm, and the rear surface radius is 29.940 mm;

[0136] The front surface radius of the eleventh lens is 61.995 mm, and the rear surface radius is -35.901 mm;

[0137] The front surface radius of the twelfth lens is -19.227 mm, and the rear surface radius is 131.397 mm;

[0138] The front surface radius of the thirteenth lens is 92.138 mm, and the rear surface radius is -42.563 mm;

[0139] The front surface radius of the fourteenth lens is 2024.218 mm, the back surface is an aspherical surface with a radius of 31.784 mm, the quadratic constant K is -3.711, the fourth-order coefficient A is -4.124e-007, the sixth-order coefficient B is -1.299e-010, the eighth-order coefficient C is -4.162-013, and the tenth-order coefficient D is -2.563e-016;

[0140] The front surface radius of the fifteenth lens is 372.955 mm, the rear surface is an aspherical surface with a radius of -40.471 mm, the quadratic constant K is 0.226, the fourth-order coefficient A is 4.184e-007, the sixth-order coefficient B is 5.353e-010, the eighth-order coefficient C is 1.176e-012, and the tenth-order coefficient D is 8.145e-015;

[0141] The reflector surface is an aspherical surface with a radius of -68.900 mm, a quadratic constant K of -0.281, a fourth-order coefficient A of 1.045e-006, a sixth-order coefficient B of -2.577e-010, an eighth-order coefficient C of -6.179e-014, and a tenth-order coefficient D of 5.011e-017;

[0142] The focal lengths of the lenses in the embodiment are as follows:

[0143] The first lens is a parallel plate with a focal length of positive infinity;

[0144] The second lens is a positive focal length lens with a focal length of 279.115068 mm;

[0145] The third lens is a positive focal length lens with a focal length of 112.058637 mm;

[0146] The fourth lens is a positive focal length lens with a focal length of 59.90589307 mm;

[0147] The fifth lens is a lens with a negative focal length, and its focal length is 25.11996502 mm;

[0148] The sixth lens is a positive focal length lens with a focal length of -16.36535949 mm;

[0149] The seventh lens is a lens with a negative focal length, and its focal length is 13.07237355 mm;

[0150] The eighth lens is a positive focal length lens with a focal length of -17.21138097 mm;

[0151] The ninth lens is a lens with a negative focal length, and its focal length is 694.5997172 mm;

[0152] The tenth lens is a positive focal length lens, and its focal length is -71.94384299 mm;

[0153] The eleventh lens is a lens with a negative focal length, and its focal length is 37.87939146 mm;

[0154] The twelfth lens is a positive focal length lens with a focal length of -27.01293006 mm;

[0155] The thirteenth lens is a positive focal length lens, and its focal length is 38.87649258 mm;

[0156] The fourteenth lens is a lens with a negative focal length, and its focal length is -53.32343863 mm;

[0157] The fifteenth lens is a positive focal length lens with a focal length of 56.9680566 mm;

[0158] Mirror 16 is a reflector with a radius of 176.814011 mm;

[0159] The aperture size of the aperture diaphragm determines the aperture value of the system and the depth of field during shooting. Its aperture size can be fixed, or an adjustable aperture diaphragm can be placed as needed to achieve adjustable light aperture, that is, to achieve the purpose of variable system aperture value and changing depth of field.

[0160] In order to further improve the imaging quality of the lens, in the embodiment of the present invention,

[0161] The first lens is a parallel flat plate;

[0162] The second lens is a meniscus lens, the surface of which facing the object side is convex;

[0163] The third lens is a meniscus lens, and the surface facing the object side is concave;

[0164] The fourth lens is a biconvex lens;

[0165] The fifth lens is a biconcave lens;

[0166] The sixth lens is a biconvex lens;

[0167] The seventh lens is a biconcave lens;

[0168] The eighth lens is a meniscus lens, and its surface facing the object side is convex;

[0169] The ninth lens is a meniscus lens, and the surface facing the object side is convex;

[0170] The tenth lens is a biconvex lens;

[0171] The eleventh lens is a biconcave lens;

[0172] The twelfth lens is a biconvex lens;

[0173] The thirteenth lens is a biconvex lens, and the lens surface on the object side is approximately flat;

[0174] The fourteenth lens is a biconcave lens, and the surface away from the object plane is aspherical;

[0175] The fifteenth lens is a biconvex lens, and the surface away from the object plane is aspherical;

[0176] The reflector is an aspheric reflector, which is used to reflect light emitted from the object surface and shorten the overall length of the optical system.

[0177] The following is an example of lens parameters provided by the embodiment of the present invention.

[0178] Example 1:

[0179] In a specific implementation process, the curvature radius R, center thickness Tc, refractive index Nd, and Abbe constant Vd of each lens of the lens meet the conditions listed in Table 1:

[0180] Table 1

[0181]

[0182] Based on the refractive index and Abbe number of the lens in Example 1, the material selection is listed as follows:

[0183] The first lens is made of Chengdu Guangming (CDGM) glass with model HQF6;

[0184] The second lens is made of Chengdu Guangming (CDGM) glass with model HK5;

[0185] The third lens is made of Chengdu Guangming (CDGM) glass with model BAF7;

[0186] The fourth lens is made of Chengdu Guangming (CDGM) glass with model HZBAF3;

[0187] The fifth lens is made of Chengdu Guangming (CDGM) glass with model HQK3;

[0188] The sixth lens is made of Chengdu Guangming (CDGM) glass with model HZF11;

[0189] The seventh lens is made of Chengdu Guangming (CDGM) glass with model HK7;

[0190] The eighth lens is made of Chengdu Guangming (CDGM) glass with model HZK8;

[0191] The ninth lens is made of Chengdu Guangming (CDGM) glass with model ZBAF1;

[0192] The tenth lens is made of Chengdu Guangming (CDGM) glass with model HLAF4;

[0193] The eleventh lens is made of Chengdu Guangming (CDGM) glass with model HZK5;

[0194] The twelfth lens is made of Chengdu Guangming (CDGM) glass with model HZK9A;

[0195] The thirteenth lens is made of Chengdu Guangming (CDGM) glass with model HZF6;

[0196] The fourteenth lens is made of Chengdu Guangming (CDGM) glass with model HF1;

[0197] The fifteenth lens is made of Chengdu Guangming (CDGM) glass with model HZK11;

[0198] It should be noted that the mirror numbers in Table 1 are Figure 1 In the lens structure diagram shown, the surface numbers of the lenses from left to right.

[0199] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent methods or changes that do not deviate from the technology of the present invention should be included in the scope of protection of the present invention.

Claims

1. An in-vehicle head-up display optical system with an ultra-large field of view, characterized in that: The lens is composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens, a twelfth lens, a thirteenth lens, a fourteenth lens, a fifteenth lens and an aspheric reflector in order from the object plane to the image plane; the first lens is a parallel plate; the second lens is a meniscus lens, the surface of which facing the object side is convex, and the surface of which facing the object side is provided with an aperture; the third lens is a meniscus lens, the surface of which facing the object side is convex; the fourth lens is a meniscus lens, the surface of which facing the object side is concave; 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 meniscus lens, the surface of which facing the object side is concave; the ninth lens is a meniscus lens, the surface of which facing the object side is convex; the tenth lens is a meniscus lens, the surface of which facing the object side is convex; the eleventh lens is a biconvex lens, the twelfth lens is a biconcave lens, the thirteenth lens is a biconvex lens, the fourteenth lens is a meniscus lens, the surface of which facing the object side is convex; the fifteenth lens is a biconvex lens, the surface away from the object plane is aspherical; The first lens is a parallel plate with a focal length of positive infinity; The second lens is a positive focal length lens with a focal length of 279.115068 mm; The third lens is a positive focal length lens with a focal length of 112.058637 mm; The fourth lens is a positive focal length lens with a focal length of 59.90589307 mm; The fifth lens is a lens with a negative focal length, and its focal length is 25.11996502 mm; The sixth lens is a positive focal length lens with a focal length of -16.36535949 mm; The seventh lens is a lens with a negative focal length, and its focal length is 13.07237355 mm; The eighth lens is a positive focal length lens with a focal length of -17.21138097 mm; The ninth lens is a lens with a negative focal length, and its focal length is 694.5997172 mm; The tenth lens is a positive focal length lens, and its focal length is -71.94384299 mm; The eleventh lens is a lens with a negative focal length, and its focal length is 37.87939146 mm; The twelfth lens is a positive focal length lens with a focal length of -27.01293006 mm; The thirteenth lens is a positive focal length lens, and its focal length is 38.87649258 mm; The fourteenth lens is a lens with a negative focal length, and its focal length is -53.32343863 mm; The fifteenth lens is a positive focal length lens with a focal length of 56.9680566 mm; The aspheric reflector is a reflector with a radius of 176.814011 mm; The first lens is a parallel flat plate, and the curvature radius of the front surface and the back surface of the first lens are both positive infinite; The front surface radius of the second lens is 17.545 mm, and the rear surface radius is 19.693 mm; The front surface radius of the third lens is 18.934 mm, and the rear surface radius is 21.960 mm; The front surface radius of the fourth lens is -57.622 mm, and the rear surface radius is -23.611 mm; The front surface radius of the fifth lens is 16.580 mm, and the rear surface radius is -44.326 mm; The front surface radius of the sixth lens is -29.331 mm, and the rear surface radius is 21.447 mm; The front surface radius of the seventh lens is 20.454 mm, and the rear surface radius is -9.878 mm; The front surface radius of the eighth lens is -9.390 mm, and the rear surface radius is -117.911 mm; The front surface radius of the ninth lens is 173.932 mm, and the rear surface radius is 291.207 mm; The front surface radius of the tenth lens is 68.313 mm, and the rear surface radius is 29.940 mm; The front surface radius of the eleventh lens is 61.995 mm, and the rear surface radius is -35.901 mm; The front surface radius of the twelfth lens is -19.227 mm, and the rear surface radius is 131.397 mm; The front surface radius of the thirteenth lens is 92.138 mm, and the rear surface radius is -42.563 mm; The front surface radius of the fourteenth lens is 2024.218 mm, the back surface is an aspherical surface with a radius of 31.784 mm, the quadratic constant K is -3.711, the fourth-order coefficient A is -4.124e-007, the sixth-order coefficient B is -1.299e-010, the eighth-order coefficient C is -4.162-013, and the tenth-order coefficient D is -2.563e-016; The front surface radius of the fifteenth lens is 372.955 mm, the rear surface is an aspherical surface with a radius of -40.471 mm, the quadratic constant K is 0.226, the fourth-order coefficient A is 4.184e-007, the sixth-order coefficient B is 5.353e-010, the eighth-order coefficient C is 1.176e-012, and the tenth-order coefficient D is 8.145e-015; The aspheric reflector surface is an aspheric surface with a radius of -68.900 mm, a quadratic surface constant K of -0.281, a fourth-order coefficient A of 1.045e-006, a sixth-order coefficient B of -2.577e-010, an eighth-order coefficient C of -6.179e-014, and a tenth-order coefficient D of 5.011e-017.

2. The vehicle-mounted head-up display optical system with a large field of view according to claim 1, characterized in that: The thickness of the first lens is 9.500 mm; the thickness of the second lens is 0.960 mm; the thickness of the third lens is 8.420 mm; the thickness of the fourth lens is 1.034 mm; the thickness of the fifth lens is 3.113 mm; the thickness of the sixth lens is 0.950 mm; the thickness of the seventh lens is 1.756 mm; the thickness of the eighth lens is 0.950 mm; the thickness of the ninth lens is 1.010 mm; the thickness of the tenth lens is 0.950 mm; the thickness of the eleventh lens is 2.558 mm; the thickness of the twelfth lens is 1.155 mm; the thickness of the thirteenth lens is 2.621 mm; the thickness of the fourteenth lens is 0.950 mm; and the thickness of the fifteenth lens is 5.917 mm.

3. The vehicle-mounted head-up display optical system with a large field of view according to claim 1, characterized in that: The material of each lens is glass.

4. The vehicle-mounted head-up display optical system with a large field of view according to claim 3, characterized in that: The first lens is made of Chengdu Guangming (CDGM) glass with model HQF6; The second lens is made of Chengdu Guangming (CDGM) glass with model HK5; The third lens is made of Chengdu Guangming (CDGM) glass with model BAF7; The fourth lens is made of Chengdu Guangming (CDGM) glass with model HZBAF3; The fifth lens is made of Chengdu Guangming (CDGM) glass with model HQK3; The sixth lens is made of Chengdu Guangming (CDGM) glass with model HZF11; The seventh lens is made of Chengdu Guangming (CDGM) glass with model HK7; The eighth lens is made of Chengdu Guangming (CDGM) glass with model HZK8; The ninth lens is made of Chengdu Guangming (CDGM) glass with model ZBAF1; The tenth lens is made of Chengdu Guangming (CDGM) glass with model HLAF4; The eleventh lens is made of Chengdu Guangming (CDGM) glass with model HZK5; The twelfth lens is made of Chengdu Guangming (CDGM) glass with model HZK9A; The thirteenth lens is made of Chengdu Guangming (CDGM) glass with model HZF6; The fourteenth lens is made of Chengdu Guangming (CDGM) glass with model HF1; The fifteenth lens is made of Chengdu Guangming (CDGM) glass with model HZK11.

5. The vehicle-mounted head-up display optical system with a large field of view according to claim 1, characterized in that: The display optical system expands the structured light module to collect and process road surface information, thereby enabling the detection of obstacles that are difficult to find on the road surface and assisting the driver in identifying road conditions at night when visibility is low.

6. The vehicle-mounted head-up display optical system with a large field of view according to claim 1, characterized in that: A display chip is placed on the first lens. The display chip is a 0.47DMD display chip, which can perform 4K projection.

7. A mechanical packaging structure for an ultra-large field-of-view vehicle head-up display optical system according to any one of claims 1 to 6, characterized in that: The mechanical packaging structure includes an EVA resin shell, and the first lens to the sixteenth lens are fixed inside the EVA resin shell using curing glue.

8. An electronic circuit for an ultra-large field-of-view vehicle head-up display optical system according to any one of claims 1 to 6, characterized in that: It includes a data transmission circuit and a DC power supply circuit; in the data transmission circuit, the processed data to be projected is detected, amplified, and received by the data transmission circuit, and then the data panel is presented to the object surface of the optical system. The optical system then projects the data onto the front windshield of the car to complete the information transmission; The DC power supply circuit provides power guarantee for the entire system. Its power supply circuit is composed of a transistor, a sliding rheostat, and several resistors, forming a stable voltage output on the collector side to provide a stable voltage for the system.

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