Lens, display module, vehicle lamp device, electronic equipment and vehicle

Abstract

The embodiment of the invention provides a lens, a display module, a vehicle lamp device, electronic equipment and a vehicle. The lens comprises at least five lenses arranged from the image side to the object side in the optical axis direction. At least three lenses in the at least five lenses have positive focal power, at least one lens has negative focal power, and when the number of the lenses with the negative focal power in the lens is one, the lens with the negative focal power in the lens is arranged between the lens closest to the image side in the lens and the lens closest to the object side in the lens in the optical axis direction. The lens provided by the embodiment of the invention can have the characteristics of a large aperture and a large field angle at the same time, so as to meet the use requirements.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of lens technology, and in particular to a lens, a display module, a vehicle light device, an electronic device and a vehicle. Background Art

[0002] With the development of smart car technology, car headlights are required to have traditional lighting functions as well as projectable patterns to meet the increasing demands for welcoming guests, information exchange, and autonomous driving. Therefore, in order to meet more and more demands, the optical requirements for headlights that can project patterns will become more stringent. For example, headlights are required to have a wider projectable field of view (FOV). The field of view can be used as one of the important indicators to reflect the amount of projected information. The larger the field of view, the greater the amount of information that can be projected. However, existing lenses used in car lights cannot have both a large aperture and a large field of view. Summary of the invention

[0003] The embodiments of the present application provide a lens, a display module, a vehicle light device, an electronic device and a vehicle, which can enable the lens to have a large aperture and a large field of view.

[0004] A first aspect of the present application provides a lens, comprising at least five lenses arranged from the image side to the object side along an optical axis; at least three of the at least five lenses have positive optical focal length, and at least one lens has negative optical focal length, wherein: when the number of lenses with negative optical focal length in the lens is one, along the optical axis direction, the lens with negative optical focal length is arranged between the lens closest to the image side and the lens closest to the object side in the lens.

[0005] The lens provided in the embodiment of the present application is composed of at least five lenses, and at least three of the at least five lenses have positive focal power and at least one lens has negative focal power, so that the lens has the characteristics of large aperture and large field of view at the same time. Among them, when the number of lenses with negative focal power in the lens is one, the lens with negative focal power is arranged between the lens closest to the image side and the lens closest to the object side in the lens, which can ensure that the lens has the characteristics of large aperture and large field of view at the same time. In addition, when the number of lenses with negative focal power in the lens is at least two, and the lens closest to the object side and / or image side in the lens has negative focal power, the lens can also have the characteristics of large aperture and large field of view at the same time.

[0006] In a possible implementation, the lens satisfies the relationship: 33 mm < EFL < 38 mm, where EFL is the focal length of the lens.

[0007] The focal length of the lens provided in the embodiment of the present application is greater than 33 mm and less than 38 mm, and can achieve a field of view angle greater than 20°X10° while achieving a large aperture, wherein 20° refers to the field of view angle of the lens in the horizontal direction, and 10° refers to the field of view angle of the lens in the vertical direction.

[0008] In a possible implementation, the lens satisfies the relationship: 1.7<R1 / EFL<5.72, wherein R1 is the radius of curvature of the image side surface of the lens element closest to the image side along the optical axis direction in the lens.

[0009] The lens provided in the embodiment of the present application satisfies the relationship: 1.7<R1 / EFL<5.72, which can reduce the manufacturing difficulty of the lens closest to the image side in the lens while achieving a large aperture and a large field of view, improve the yield, and help improve economy. In addition, it can also facilitate the correction of aberrations. In addition, it can also prevent the image side of the lens closest to the image side of the lens from being too protruding or too flat, wherein the image side of the lens closest to the image side is too protruding, which may cause the lens to interfere with other components, and the image side of the lens closest to the image side is too flat, which will affect the shape of the headlights.

[0010] In a possible implementation, the lens satisfies the relationship: 64.5 mm < R1 < 200 mm, where R1 is the radius of curvature of the image side surface of the lens element closest to the image side along the optical axis direction of the lens.

[0011] The lens provided in the embodiment of the present application satisfies the relationship: 64.5mm<R1<200mm, and can also reduce the manufacturing difficulty of the lens closest to the image side of the lens while achieving a large aperture and a large field of view, improve the yield, and help improve economic efficiency. In addition, it can also facilitate the correction of aberrations. In addition, it can also prevent the image side of the lens closest to the image side of the lens from being too protruding or too flat.

[0012] In a possible implementation, the lens satisfies the relationship: -23<R2 / EFL<11.2, wherein R2 is the radius of curvature of the object side surface of the lens element closest to the object side along the optical axis direction in the lens.

[0013] The lens provided in the embodiment of the present application satisfies the relationship: -23<R2 / EFL<11.2. Under the premise of achieving a large aperture and a large field of view at the same time, the manufacturing difficulty of the lens closest to the object side in the lens can be reduced, the yield rate can be improved, and it is beneficial to improve the economy. In addition, it can also prevent the object side of the lens closest to the object side in the lens from being too protruding or too concave. Among them, if the object side of the lens closest to the object side is too protruding, it will interfere with the other optical elements, or it will compress the optical space between the lens and the projection chip, or it will cause damage to the lens close to the object side. If the object side of the lens closest to the object side is too concave, it will be detrimental to aberration correction.

[0014] In a possible implementation, the lens satisfies the relationship: -860mm<R2<385mm, where R2 is the radius of curvature of the object side surface of the lens element closest to the object side along the optical axis direction in the lens.

[0015] The lens provided in the embodiment of the present application satisfies the relationship: -860mm<R2<385mm, and can also reduce the manufacturing difficulty of the lens closest to the object side of the lens while achieving a large aperture and a large field of view, improve the yield rate, and help improve economic efficiency. In addition, it can also prevent the object side of the lens closest to the object side of the lens from being too protruding or too concave.

[0016] In a possible implementation, the lens satisfies the relationship: 0.9<BFL / EFL<1.15, where BFL is the back focal length of the lens.

[0017] The lens provided in the embodiment of the present application satisfies the relationship: 0.9<BFL / EFL<1.15, which can prevent the optical path of the lens from being too long or too short. Among them, the optical path of the lens is too long, which is not conducive to the design. The optical path of the lens is too short, which is not conducive to the setting of the rear optical path.

[0018] In a possible implementation, along the optical axis direction, the lens element closest to the image side in the lens has positive refractive power.

[0019] The lens provided in the embodiment of the present application can improve the economy of the lens while achieving a large aperture and a large field of view by setting the lens closest to the image side to a lens with positive focal power.

[0020] In a possible implementation, along the optical axis, the lens element closest to the object side in the lens has positive refractive power.

[0021] The lens provided in the embodiment of the present application can increase the amount of light entering the lens by setting the lens closest to the object side to a lens with positive focal power, thereby improving the optical performance. In addition, the cost-effectiveness of the lens can also be improved.

[0022] In a possible implementation, at least one lens is a spherical lens.

[0023] The more spherical mirrors the lens provided in the embodiment of the present application uses, the greater the degree to which the processing difficulty of the lens is reduced, which is beneficial to improving the yield.

[0024] A second aspect of the present application provides a display module, comprising a projection chip and a lens as described in any one of the first aspects.

[0025] The display module provided in the embodiment of the present application can simultaneously have the characteristics of a large aperture and a large field of view by adopting the lens of the first aspect to meet display requirements.

[0026] A third aspect of the present application provides a vehicle lamp device, comprising a light source and a display module as in the second aspect.

[0027] The vehicle lamp device provided in the embodiment of the present application adopts the display surface module of the second aspect, so that the vehicle lamp device has the characteristics of large aperture and large field of view, which can improve the projection range and brightness of the vehicle lamp device during projection to meet usage requirements.

[0028] A fourth aspect of the present application provides an electronic device, comprising the display module of the second aspect.

[0029] A fifth aspect of the present application provides a vehicle, comprising a display module as in the second aspect or a vehicle lighting device as in the third aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of the structure of a vehicle lamp device provided in an embodiment of the present application;

[0031] Figure 2 A schematic diagram of the structure of a first display module provided in an embodiment of the present application;

[0032] Figure 3 for Figure 2 Spherochromatic aberration diagram of the lens in;

[0033] Figure 4 for Figure 2 Astigmatism field curvature diagram of the lens in;

[0034] Figure 5 for Figure 2 Distortion diagram of the lens in ;

[0035] Figure 6 A schematic diagram of the structure of a second display module provided in an embodiment of the present application;

[0036] Figure 7 for Figure 6 Spherical aberration color diagram of the lens in;

[0037] Figure 8 for Figure 6 Astigmatism field curvature diagram of the lens in;

[0038] Fig. 9 for Figure 6 Distortion diagram of the lens in ;

[0039] Fig.10 A schematic diagram of the structure of a third display module provided in an embodiment of the present application;

[0040] Fig.11 for Fig.10 Spherochromatic aberration diagram of the lens in;

[0041] Fig.12 for Fig.10 Astigmatism field curvature diagram of the lens in;

[0042] Fig.13 for Fig.10 Distortion diagram of the lens in ;

[0043] Fig.14 A schematic diagram of the structure of a fourth display module provided in an embodiment of the present application;

[0044] Fig.15 for Fig.14 Spherochromatic aberration diagram of the lens in;

[0045] Fig.16 for Fig.14 Astigmatism field curvature diagram of the lens in;

[0046] Fig.17 for Fig.14 Distortion diagram of the lens in ;

[0047] Fig.18 A schematic diagram of the structure of a fifth display module provided in an embodiment of the present application;

[0048] Fig.19 for Fig.18 Spherochromatic aberration diagram of the lens in;

[0049] Fig. 20 for Fig.18 Astigmatism field curvature diagram of the lens in;

[0050] Fig.21 for Fig.18 Distortion diagram of the lens in ;

[0051] Fig. 22 A schematic diagram of the structure of a fifth display module provided in an embodiment of the present application;

[0052] Fig.23 for Fig. 22 Spherochromatic aberration diagram of the lens in;

[0053] Fig.24 for Fig. 22 Astigmatism field curvature diagram of the lens in;

[0054] Fig.25 for Fig. 22 Distortion diagram of the lens in ;

[0055] Fig.26 A schematic diagram of the structure of a sixth display module provided in an embodiment of the present application;

[0056] Fig. 27 for Fig.26 Spherochromatic aberration diagram of the lens in;

[0057] Fig.28 for Fig.26 Astigmatism field curvature diagram of the lens in;

[0058] Fig.29 for Fig.26 Distortion diagram of the lens in ;

[0059] Fig.30 A schematic diagram of the structure of an eighth display module provided in an embodiment of the present application;

[0060] Fig.31 for Fig.30 Spherochromatic aberration diagram of the lens in;

[0061] Fig.32 for Fig.30 Astigmatism field curvature diagram of the lens in;

[0062] Fig.33 for Fig.30 Distortion diagram of the lens in .

[0063] Description of reference numerals:

[0064] 100. Vehicle lighting device;

[0065] 200, light source;

[0066] 300, display module;

[0067] 310, lens; 320, projection chip;

[0068] 11. First lens; 12. Second lens; 13. Third lens; 14. Fourth lens; 15. Fifth lens;

[0069] 20. Cover glass; 30. Aperture. DETAILED DESCRIPTION

[0070] The terms used in the implementation section of this application are only used to explain the specific embodiments of this application and are not intended to limit this application.

[0071] To facilitate understanding, the relevant technical terms involved in the embodiments of the present application are first explained and illustrated.

[0072] Focal length, also known as focal length, is a measure of the concentration or dispersion of light in an optical system. It refers to the vertical distance from the optical center of a lens or lens group to the focal plane when an infinitely distant scene forms a clear image on the focal plane through a lens or lens group.

[0073] The image side, with the lens as the boundary, the side where the image is located is the image side, and the side of the lens facing the image side is the image side of the lens.

[0074] Object side: the side where the projection chip is located is the object side, and the side of the lens facing the object side is the object side surface.

[0075] The total track length (TTL) refers to the total length from the vertex of the first lens element located near the object side of the lens to the imaging surface of the lens, also known as the total optical length.

[0076] Back focal length (BFL) is defined as the distance from the lens closest to the imaging surface to the projection chip.

[0077] Optical power represents the ability of a lens to refract an incident parallel light beam.

[0078] Positive power means that the lens has a positive focal length and has the effect of converging light.

[0079] Negative optical power means that the lens has a negative focal length and has the effect of diverging light.

[0080] The aperture is a device used to control the amount of light that passes through the lens into an electronic device. It is usually inside the lens, and the aperture size is expressed in F# (F-number).

[0081] The aperture number F# is a relative value obtained by dividing the focal length of the lens by the diameter of the lens (the inverse of the relative aperture). The smaller the aperture number F#, the more light enters in the same unit time.

[0082] Cover glass (CG) is used to protect the projection chip.

[0083] Digital micromirror devices (DMD) are used to reflect light to form images.

[0084] Liquid crystal on silicon (LCOS), used to reflect light.

[0085] Axial chromatic aberration, also known as longitudinal chromatic aberration or position chromatic aberration, is a beam of light parallel to the optical axis that converges at different positions before and after passing through the lens. This aberration is called position chromatic aberration or axial chromatic aberration. This is because the positions of the images of different wavelengths of light are different, so that the imaging planes of the images of different colors of light cannot completely overlap when the final image is formed, and the complex light spreads out to form dispersion.

[0086] Distortion, also known as distortion, is the degree of distortion of the image formed by the optical system relative to the object itself. Distortion is due to the influence of aperture aberration. The height of the intersection of the main light of different fields of view with the Gaussian image plane after passing through the optical system is not equal to the ideal image height. The difference between the two is the distortion. Therefore, distortion only changes the imaging position of the off-axis object point on the ideal plane, causing the shape of the image to be distorted, but does not affect the clarity of the image.

[0087] With the development of smart car technology, car headlights are required to have traditional lighting functions as well as projectable patterns to meet the increasing demands for welcoming guests, information exchange, and autonomous driving. Therefore, in order to meet more and more demands, the optical requirements for headlights that can project patterns will become more stringent. For example, headlights are required to have a wider projectable field of view (FOV). The field of view can be used as one of the important indicators to reflect the amount of projected information. The larger the field of view, the greater the amount of information that can be projected. However, existing lenses used in car lights cannot have both a large aperture and a large field of view. Therefore, how to make the lens have both a large aperture and a large field of view has become a problem that needs to be solved urgently.

[0088] In view of this, an embodiment of the present application provides a lens 310, a display module 300, a vehicle lamp device 100, an electronic device and a vehicle. The lens 310 can have the characteristics of a large aperture and a large field of view, and can improve the projection range and brightness to meet usage requirements.

[0089] Figure 1 This is a schematic diagram of the structure of a vehicle lamp device 100 provided in an embodiment of the present application. Figure 1 As shown, the vehicle lamp device 100 of the embodiment of the present application includes a light source 200 and a display module 300. The display module 300 includes a projection chip 320 and a lens 310, and the projection chip 320 is arranged on the object side of the lens 310. During the use of the vehicle lamp device 100, the light source 200 emits imaging light that can be reflected by the projection chip 320, and the projection chip 320 reflects the imaging light to the lens 310. After the imaging light passes through the lens 310, it forms information to be displayed on the image side to meet the needs of welcoming guests, information interaction, automatic driving, etc.

[0090] In the embodiment of the present application, the projection chip 320 may include but is not limited to a digital micromirror array (DMD) or liquid crystal on silicon (LCOS).

[0091] The vehicle lamp device 100 provided in the embodiment of the present application may include but is not limited to pixel display lights, near-field welcome lights, pedestrian or other vehicle interaction lights, etc.

[0092] When the vehicle lamp device 100 provided in the embodiment of the present application is applied to a transportation tool, the transportation tool may include but is not limited to a vehicle, a ship, an airplane, a train, etc. Among them, the vehicle may include but is not limited to a unicycle, a two-wheeled vehicle, a three-wheeled vehicle or a four-wheeled vehicle, etc. For example, in the embodiment of the present application, a four-wheeled vehicle is taken as an example for explanation.

[0093] It should be noted that when the display module 300 provided in the embodiment of the present application is applied to a vehicle, in addition to setting the display module 300 in the vehicle lamp device 100, the display module 300 may also be set in other parts of the vehicle to display the information to be displayed. In addition, in some embodiments, the vehicle lamp device 100 may not include the display module 300, and the display module 300 may be set in other parts of the vehicle.

[0094] It should also be noted that the display module 300 provided in the embodiment of the present application can be applied to electronic devices other than transportation vehicles, and the electronic devices may include but are not limited to displays, projectors, head-up displays and other devices.

[0095] The lens 310 and the display module 300 provided in the embodiment of the present application are described in detail below with reference to the accompanying drawings.

[0096] Figure 2 This is a schematic diagram of the structure of the first display module 300 provided in the embodiment of the present application. Figure 2 As shown, the display module 300 provided in the embodiment of the present application includes a projection chip 320 and a lens 310. Along the optical axis direction, the projection chip 320 and the lens 310 are spaced apart, and the side where the projection chip 320 is located is the object side. In other words, the projection chip 320 is arranged on the object side of the lens 310.

[0097] For some possible implementations, see Figure 2 As shown, the display module 300 provided in the embodiment of the present application may further include an aperture 30, which is disposed between the second lens and the third lens of the lens 310 along the direction of the optical axis from the image side to the object side. Of course, the aperture 30 may also be disposed at other positions along the optical axis. For example, in some embodiments, the aperture 30 is disposed between the first lens and the second lens of the lens 310 along the direction of the optical axis from the image side to the object side (not shown in the figure). However, when the aperture 30 is disposed between the second lens and the third lens of the lens 310, the economy of the lens 310 can be improved while ensuring the optical performance.

[0098] In some possible implementations, see Figure 2As shown, the display module 300 provided in the embodiment of the present application may further include a cover glass 20 . The cover glass 20 is disposed between the lens 310 and the projection chip 320 . The cover glass 20 may protect the projection chip 320 .

[0099] It should be noted that, in some embodiments, the cover glass 20 may be removed (not shown in the figure). Or in some embodiments, the cover glass 20 may be replaced with a filter for correcting color deviation (not shown in the figure). Of course, in some embodiments, the filter and the cover glass 20 may also exist at the same time.

[0100] In the embodiment of the present application, the lens 310 includes a lens 311 along the optical axis direction (eg Figure 2 At least five lenses arranged from the image side to the object side (in the X direction), such as Figure 2 As shown, the lens 310 includes a first lens 11, a second lens 12, a third lens 13, a fourth lens 14 and a fifth lens 15, so the number of lenses is five. Of course, the number of lenses can be more than five. At least three of the at least five lenses have positive focal power, and at least one lens has negative focal power. In other words, at least three of the lenses in the lens 310 have positive focal power, and at least one lens has negative focal power. For example, Figure 2 As shown, three of the five lenses of the first lens 11 to the fifth lens 15 have positive power, and the other two lenses have negative power. When the number of lenses with negative power in the lens 310 is one, along the optical axis direction, the lens with negative power is arranged between the lens closest to the image side of the lens 310 and the lens closest to the object side of the lens 310, for example Figure 2 As shown, the number of lenses is five, then one of the second lens 12, the third lens 13, and the fourth lens 14 of the five lenses arranged from the image side to the object side along the optical axis has a negative optical power. When the number of lenses with negative optical power in the lens 310 is at least two, at least one of the lens closest to the object side in the lens 310 and the lens closest to the image side in the lens 310 may have a negative optical power, or may not have a negative optical power. In other words, when the number of lenses with negative optical power is at least two, there is no restriction on the position of the lenses with negative optical power.

[0101] The lens 310 provided in the embodiment of the present application is composed of at least five lenses, and at least three of the at least five lenses have positive focal power and at least one lens has negative focal power, so that the lens 310 has the characteristics of large aperture and large field of view. Among them, when the number of lenses with negative focal power in the lens 310 is one, the lens with negative focal power is arranged between the lens closest to the image side of the lens 310 and the lens closest to the object side of the lens 310, which can ensure that the lens 310 has the characteristics of large aperture and large field of view. In addition, when the number of lenses with negative focal power in the lens 310 is at least two, at least one of the lens closest to the object side and the lens closest to the image side of the lens 310 has negative focal power, which can also make the lens 310 have the characteristics of large aperture and large field of view.

[0102] It should be noted that the lens 310 provided in the embodiment of the present application can have a large aperture by using at least three of the at least five lenses having positive focal power and at least one lens having negative focal power, and the aperture value Fno is ≤ 1.4. The specific value of the aperture value is not limited here. For example, Fno can include but is not limited to 1.38, 1.378, 1.37, 1.36, 1.35, etc.

[0103] In some possible implementations, the lens 310 may also satisfy the relationship: 33 mm<EFL<38 mm, where EFL is the focal length of the lens 310 .

[0104] Correspondingly, the focal length of the lens 310 provided in the embodiment of the present application is greater than 33 mm and less than 38 mm, and can achieve a field of view angle greater than 20°X10° while achieving a large aperture, wherein 20° refers to the field of view angle of the lens 310 in the horizontal direction, and 10° refers to the field of view angle of the lens 310 in the vertical direction.

[0105] In the embodiment of the present application, there is no limitation on the specific value of the focal length of the lens 310, and may include but is not limited to 33.5 mm, 33.88 mm, 33.9 mm, 34 mm, 34.5 mm, 35 mm, 35.3 mm, 36 mm, 37 mm or 37.5 mm.

[0106] In some possible implementations, the lens 310 may also satisfy the relationship: 1.7<R1 / EFL<5.72, where R1 is the curvature radius of the image side surface of the lens element closest to the image side along the optical axis in the lens 310.

[0107] Accordingly, the lens 310 provided in the embodiment of the present application satisfies the relationship: 1.7<R1 / EFL<5.72, which can reduce the manufacturing difficulty of the lens closest to the image side in the lens 310 while achieving a large aperture and a large field of view, improve the yield, and help improve economy. In addition, it can also facilitate the correction of aberrations. In addition, it can also prevent the image side of the lens closest to the image side in the lens 310 from being too protruding or too flat, wherein the image side of the lens closest to the image side being too protruding may cause the lens to interfere with other components, and the image side of the lens closest to the image side being too flat will affect the shape of the headlights.

[0108] In the embodiments of the present application, there is no limitation on the specific ratio of R1 / EFL, and may include but is not limited to 1.7112, 1.71, 1.795, 1.85, 1.888, 1.897, 1.9, 1.95, 1.984, 2, 2.5, 5.987, 2.6, 3, 3.5, 3.7, 4, 4.2, 4.5, 4.9, 5, 5.1, 5.4, 5.498, 5.5, 5.6 or 5.65, etc.

[0109] In some possible implementations, the lens 310 may also satisfy the relationship: 64.5 mm<R1<200 mm, where R1 is the curvature radius of the image side surface of the lens element closest to the image side along the optical axis in the lens 310 .

[0110] Accordingly, the lens 310 provided in the embodiment of the present application can reduce the manufacturing difficulty of the lens closest to the image side in the lens 310 while achieving a large aperture and a large field of view by satisfying the relationship: 64.5mm<R1<200mm, thereby improving the yield rate and being beneficial to improving economic efficiency. In addition, it can also facilitate the correction of aberrations. In addition, it can also prevent the image side of the lens closest to the image side in the lens 310 from being too protruding or too flat.

[0111] In the embodiment of the present application, there is no limitation on the specific value of R1, for example, it may include but is not limited to 64.575mm, 64.8mm, 65mm, 66mm, 67mm, 70mm, 72mm, 73.5mm, 76.98mm, 79mm, 80mm, 85mm, 90mm, 95mm, 100mm, 105mm, 110mm, 115mm, 120mm, 121mm, 125mm, 128mm, 135mm, 140mm, 145mm, 150mm, 160mm, 170mm, 175mm, 180mm, 185mm, 190mm, 195mm, 196mm, 197mm, 198mm, 199mm or 199.5mm, etc.

[0112] It should be noted that the lens 310 can satisfy at least one of the relationship: 1.7<R1 / EFL<5.72 and the relationship: 64.5mm<R1<200mm. For example, in the embodiment of the present application, the lens 310 satisfies both of these relationships (1.7<R1 / EFL<5.72, and 64.5mm<R1<200mm). However, in some embodiments, the lens 310 can also satisfy any one of these two relationships. When the lens 310 satisfies both of these relationships, the optical performance and economy of the lens 310 can be further improved.

[0113] In some possible implementations, the lens 310 may also satisfy the relationship: -23<R2 / EFL<11.2, where R2 is the curvature radius of the object side surface of the lens element in the lens 310 that is closest to the object side along the optical axis.

[0114] Accordingly, the lens 310 provided in the embodiment of the present application satisfies the relationship: -23<R2 / EFL<11.2, which can reduce the manufacturing difficulty of the lens closest to the object side in the lens 310 under the premise of achieving a large aperture and a large field of view at the same time, improve the yield, and help improve the economy. In addition, it can also prevent the object side of the lens closest to the object side in the lens 310 from being too protruding or too concave. Among them, if the object side of the lens closest to the object side is too protruding, it will interfere with the remaining optical elements, or it will compress the optical space between the lens 310 and the projection chip 320, or it will cause damage to the lens close to the object side. If the object side of the lens closest to the object side is too concave, it will be detrimental to aberration correction.

[0115] In the embodiments of the present application, there is no limitation on the specific ratio of R2 / EFL, and for example, it may include but is not limited to -22.985, -22.61, -22.5, -22.3, -22, -21, -10.5, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 1.85, 1.897, 1.9, 1.95, 2, 2.5, 5.987, 2.6, 3, 3.5 , 3.6, 4, 4.5, 5, 5.1, 5.159, 5.19, 5.195, 6, 7, 8, 9, 9.1, 9.22, 9.984, 10, 10.01, 11.1, 10.2, 10.22, 10.3, 10.4, 10.45, 10.498, 10.5, 10.6, 10.7, 10.8, 10.9, 11, 11.0986, 11.1 or 11.1985, etc.

[0116] In some possible implementations, the lens 310 may also satisfy the relationship: -860 mm<R2<385 mm, where R2 is the radius of curvature of the object side surface of the lens element in the lens 310 that is closest to the object side along the optical axis.

[0117] Accordingly, the lens 310 provided in the embodiment of the present application satisfies the relationship: -860mm<R2<385mm, and can also reduce the manufacturing difficulty of the lens closest to the object side in the lens 310 while achieving a large aperture and a large field of view, improve the yield, and help improve economic efficiency. In addition, it can also prevent the object side of the lens closest to the object side in the lens 310 from being too protruding or too concave.

[0118] In the embodiment of the present application, there is no limitation on the specific value of R2, for example, it may include but is not limited to -859mm, -856mm, -850mm, -840mm, -390mm, -350mm, -300mm, -250mm, -200mm, -150mm, -100mm, 0, 10mm, 50mm, 73.5mm, 76.98mm, 79mm, 80mm, 85mm, 90mm, 95mm, 100mm, 105mm, 110mm, 115mm, 120mm , 121mm, 125mm, 129mm, 130mm, 140mm, 150mm, 160mm, 170mm, 180mm, 181mm, 182mm, 183mm, 184mm, 184.954mm, 200mm, 250mm, 300mm, 310mm, 340mm, 350mm, 355mm, 359mm, 360mm, 370mm, 375mm, 380mm, 381mm, 382mm, 383mm, 384mm or 384.598mm, etc.

[0119] It should be noted that the lens 310 can satisfy at least one of the relationship: -23<R2 / EFL<11.2 and the relationship: -860mm<R2<385mm. For example, in the embodiment of the present application, the lens 310 satisfies both of these relationships (-12<R2 / EFL<11.2, and -860mm<R2<385mm). However, in some embodiments, the lens 310 can also satisfy any one of these two relationships. When the lens 310 satisfies both of these relationships, the optical performance and economy of the lens 310 can be further improved.

[0120] In some possible implementations, the lens 310 satisfies the relationship: 0.9<BFL / EFL<1.15, where BFL is the back focal length of the lens 310 .

[0121] Accordingly, the lens 310 provided in the embodiment of the present application satisfies the relationship: 0.9<BFL / EFL<1.15, which can prevent the optical path of the lens 310 from being too long or too short. Among them, the optical path of the lens 310 is too long, which is not conducive to the design. The optical path of the lens 310 is too short, which is not conducive to the setting of the rear optical path.

[0122] In the embodiments of the present application, there is no limitation on the specific ratio of BFL / EFL, and for example, it may include but is not limited to 0.91, 0.92, 0.93, 0.94, 0.95, 0.96, 0.97, 0.98, 0.99, 1, 1.01, 1.054, 1.0698, 1.1, 1.11, 1.12, 1.13 or 1.14, etc.

[0123] In some possible implementations, along the optical axis, the lens element closest to the image side in the lens 310 has positive refractive power.

[0124] Accordingly, the lens 310 provided in the embodiment of the present application can improve the economy of the lens 310 while achieving a large aperture and a large field of view angle by setting the lens closest to the image side to a lens with positive optical power.

[0125] In some possible implementations, along the optical axis, the lens element closest to the object side in the lens 310 has positive refractive power.

[0126] Accordingly, the lens 310 provided in the embodiment of the present application can increase the amount of light entering the lens 310 by setting the lens closest to the object side to a lens with positive optical power, thereby improving the optical performance. In addition, the economic efficiency of the lens 310 can also be improved.

[0127] In some possible implementations, at least one lens is a spherical lens, for example Figure 2 As shown, the five lenses in the lens 310 are all spherical lenses. Of course, the number of spherical lenses can also be less than five.

[0128] Accordingly, the more spherical mirrors the lens 310 uses in the embodiment of the present application, the greater the degree of reduction in the difficulty of processing the lens 310, which is beneficial to improving the yield rate. In addition, the imaging quality can also be improved.

[0129] In some possible implementations, each lens is a glass lens.

[0130] Accordingly, each lens in the lens 310 provided in the embodiment of the present application is a glass lens, which can improve the reliability of the lens 310 and ensure the imaging quality.

[0131] Of course, each lens in the lens 310 can be an optical plastic lens in addition to a glass lens. In the embodiment of the present application, each lens is a glass lens, which can better adapt to the use environment of the vehicle and help improve the reliability of the lens 310110.

[0132] The structure and performance of the display module 300 provided in the embodiment of the present application are described below in conjunction with specific embodiments.

[0133] Embodiment 1:

[0134] Continue to see Figure 2 As shown, the display module 300 provided in the first embodiment includes a lens 310, an aperture 30, a cover glass 20 and a projection chip 320. The cover glass 20 is disposed between the projection chip 320 and the lens 310. Along the direction of the optical axis from the image side to the object side, the lens 310 includes a first lens 11, a second lens 12, a third lens 13, a fourth lens 14 and a fifth lens 15, the first lens 11 is closest to the image side, the fifth lens 15 is closest to the object side, and the aperture 30 is disposed between the second lens 12 and the third lens 13.

[0135] The first lens 11 has positive power, and the ratio of the focal length f1 of the first lens 11 to the focal length EFL of the lens 310 is: |f1 / EFL|=3.31. The second lens 12 has negative power, and the ratio of the focal length f2 of the second lens 12 to the focal length EFL of the lens 310 is: |f2 / EFL|=84.552. The third lens 13 has negative power, and the ratio of the focal length f3 of the third lens 13 to the focal length EFL of the lens 310 is: |f3 / EFL|=1.11. The fourth lens 14 has positive power, and the ratio of the focal length f4 of the third lens 13 to the focal length EFL of the lens 310 is: |f4 / EFL|=1.4759. The fifth lens 15 has positive power, and the ratio of the focal length f5 of the fourth lens 14 to the focal length EFL of the lens 310 is: |f5 / EFL|=1.2223.

[0136] Among them, the ratio of the curvature radius of the image side surface of the lens closest to the image side in the lens 310 to the focal length of the lens 310 is: R1 / EFL=1.795, which is greater than 1.7 and less than 5.72, meeting the requirements. The curvature radius of the image side surface of the lens closest to the image side in the lens 310 is 64.6070 mm, which is greater than 64.5 mm and less than 200 mm, meeting the requirements.

[0137] Among them, the ratio of the curvature radius of the object side surface of the lens closest to the object side in the lens 310 to the focal length of the lens 310 is: R2 / EFL=-23.611, which is greater than -23 and less than 11.2, meeting the requirements. The curvature radius of the object side surface of the lens closest to the object side in the lens 310 is R1=-850mm, which is greater than -860mm and less than 385mm, meeting the requirements.

[0138] The focal length EFL of the lens 310 is 35.66 mm, which is greater than 33 mm and less than 38 mm, meeting the requirement. The ratio of the back focal length BFL of the lens 310 to the focal length EFL is: BFL / EFL=1.075, which is greater than 0.9 and less than 1.15, meeting the requirement.

[0139] Table 1 shows the optical parameters of each optical element in the display module 300 provided in the first embodiment.

[0140]

[0141] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the aperture 30, L4 is the third lens 13, L5 is the fourth lens 14, L6 is the fifth lens 15, L7 is the glass cover, OBJ is the projection plane (object plane), and ImgH is the imaging plane.

[0142] R is the radius of curvature of the optical element (such as a lens or a glass cover, etc.) at the corresponding position of the optical axis.

[0143] Th is the surface thickness of the optical element along the optical axis.

[0144] Nd is the refractive index of each optical element when d-ray is irradiated.

[0145] Vd is the Abbe number of the optical element.

[0146] Table 2 shows the optical parameters of the lens 310 provided in the first embodiment.

[0147] f1(mm) 119.1414 EFL(mm) 35.66 f2(mm) 3054.750 TTL(mm) 90 f3(mm) -40.010 Fno 1.36 f4(mm) 53.131 BFL(mm) 38.67 f5(mm) 44.001 R1(mm) 64.6070 R2(mm) -850 FOV(°) 22.3

[0148] Among them, EFL is the focal length of the lens 310, FOV is the maximum field of view of the lens 310, Fno is the aperture of the lens 310, BFL is the back focal length of the lens 310, R1 is the curvature radius of the image side surface of the lens closest to the image side in the lens 310, R2 is the curvature radius of the object side surface of the lens closest to the object side in the lens 310, f1 is the focal length of the first lens 11, f2 is the focal length of the second lens 12, f3 is the focal length of the third lens 13, f4 is the focal length of the fourth lens 14, and f5 is the focal length of the fifth lens 15.

[0149] Figure 3 for Figure 2Spherical aberration diagram of lens 310 in FIG. Figure 3 In the figure, the ordinate represents the normalized pupil coordinate, and the abscissa represents the aberration in the axial direction, in millimeters. Figure 3 In FIG. 1 , A corresponds to the axial aberration curve of light with a wavelength of 525 nm after passing through the lens 310 of this embodiment, B corresponds to the axial aberration curve of light with a wavelength of 617 nm after passing through the lens 310 of this embodiment, and C corresponds to the axial aberration curve of light with a wavelength of 460 nm after passing through the lens 310 of this embodiment. Figure 3 It can be seen that in this embodiment, the axial aberration is controlled within a very small range and is well corrected.

[0150] Figure 4 for Figure 2 The astigmatism field curvature diagram of the lens 310 in FIG. Figure 5 for Figure 2 Distortion diagram of lens 310 in FIG. Figure 4 In , S represents the field curvature value of the light with a wavelength of 525nm on the meridional image plane, and T represents the field curvature value of the light with a wavelength of 525nm on the sagittal image plane. Figure 5 In FIG. 1 , the solid line represents the distortion value of light having a central wavelength of 525 nm passing through the lens 310 of this embodiment. Figure 4 and Figure 5 It can be seen that the lens 310 provided in this embodiment controls the field curvature and distortion within a corresponding range, and can meet the usage requirements.

[0151] Embodiment 2:

[0152] Figure 6 This is a schematic diagram of the structure of the second display module 300 provided in the embodiment of the present application. Figure 6 As shown, the display module 300 provided in the second embodiment includes a lens 310, an aperture 30, a cover glass 20 and a projection chip 320. The cover glass 20 is disposed between the projection chip 320 and the lens 310. Along the direction of the optical axis from the image side to the object side, the lens 310 includes a first lens 11, a second lens 12, a third lens 13, a fourth lens 14 and a fifth lens 15, the first lens 11 is closest to the image side, the fifth lens 15 is closest to the object side, and the aperture 30 is disposed between the second lens 12 and the third lens 13.

[0153] The first lens 11 has positive power, and the ratio of the focal length f1 of the first lens 11 to the focal length EFL of the lens 310 is: |f1 / EFL|=1.4248. The second lens 12 has negative power, and the ratio of the focal length f2 of the second lens 12 to the focal length EFL of the lens 310 is: |f2 / EFL|=0.517. The third lens 13 has negative power, and the ratio of the focal length f3 of the third lens 13 to the focal length EFL of the lens 310 is: |f3 / EFL|=1.791. The fourth lens 14 has positive power, and the ratio of the focal length f4 of the third lens 13 to the focal length EFL of the lens 310 is: |f4 / EFL|=0.76. The fifth lens 15 has positive power, and the ratio of the focal length f5 of the fourth lens 14 to the focal length EFL of the lens 310 is: |f5 / EFL|=1.680.

[0154] Among them, the ratio of the curvature radius of the image side surface of the lens closest to the image side in the lens 310 to the focal length of the lens 310 is: R1 / EFL=1.888, which is greater than 1.7 and less than 5.72, meeting the requirements. The curvature radius of the image side surface of the lens closest to the image side in the lens 310 is 67.961 mm, which is greater than 64.5 mm and less than 200 mm, meeting the requirements.

[0155] Among them, the ratio of the curvature radius of the object side surface of the lens closest to the object side in the lens 310 to the focal length of the lens 310 is: R2 / EFL=5.0257, which is greater than -23 and less than 11.2, meeting the requirements. The curvature radius of the object side surface of the lens closest to the object side in the lens 310 is R2=180.922mm, which is greater than -860mm and less than 385mm, meeting the requirements.

[0156] The focal length EFL of the lens 310 is 35.99 mm, which is greater than 33 mm and less than 38 mm, meeting the requirement. The ratio of the back focal length BFL of the lens 310 to the focal length EFL is: BFL / EFL=1.054, which is greater than 0.9 and less than 1.15, meeting the requirement.

[0157] Table 3 shows the optical parameters of each optical element in the display module 300 provided in the second embodiment.

[0158]

[0159]

[0160] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the aperture 30, L4 is the third lens 13, L5 is the fourth lens 14, L6 is the fifth lens 15, L7 is the glass cover, OBJ is the projection plane (object plane), and ImgH is the imaging plane.

[0161] R is the radius of curvature of the optical element (such as a lens or a glass cover, etc.) at the corresponding position of the optical axis.

[0162] Th is the surface thickness of the optical element along the optical axis.

[0163] Nd is the refractive index of each optical element when d-ray is irradiated.

[0164] Vd is the Abbe number of the optical element.

[0165] Table 4 shows the optical parameters of the lens 310 provided in the second embodiment.

[0166] f1(mm) 51.292 EFL(mm) 35.99 f2(mm) -18.618 TTL(mm) 90 f3(mm) -64.478 Fno 1.37 f4(mm) 27.362 BFL(mm) 38.67 f5(mm) 60.487 R1(mm) 67.961 R2(mm) 180.922 FOV(°) 22.3

[0167] Among them, EFL is the focal length of the lens 310, FOV is the maximum field of view of the lens 310, Fno is the aperture of the lens 310, BFL is the back focal length of the lens 310, R1 is the curvature radius of the image side surface of the lens closest to the image side in the lens 310, R2 is the curvature radius of the object side surface of the lens closest to the object side in the lens 310, f1 is the focal length of the first lens 11, f2 is the focal length of the second lens 12, f3 is the focal length of the third lens 13, f4 is the focal length of the fourth lens 14, and f5 is the focal length of the fifth lens 15.

[0168] Figure 7 for Figure 6 Spherical aberration diagram of lens 310 in FIG. Figure 6 In the figure, the ordinate represents the normalized pupil coordinate, and the abscissa represents the aberration in the axial direction, in millimeters. Figure 6 In FIG. 1 , A corresponds to the axial aberration curve of light with a wavelength of 525 nm after passing through the lens 310 of this embodiment, B corresponds to the axial aberration curve of light with a wavelength of 617 nm after passing through the lens 310 of this embodiment, and C corresponds to the axial aberration curve of light with a wavelength of 460 nm after passing through the lens 310 of this embodiment. Figure 6 It can be seen that in this embodiment, the axial aberration is controlled within a very small range and is well corrected.

[0169] Figure 8 for Figure 6 The astigmatism field curvature diagram of the lens 310 in FIG. Fig. 9 for Figure 6 Distortion diagram of lens 310 in FIG. Figure 8 In , S represents the field curvature value of the light with a wavelength of 525nm on the meridional image plane, and T represents the field curvature value of the light with a wavelength of 525nm on the sagittal image plane. Fig. 9 In FIG. 1 , the solid line represents the distortion value of light having a central wavelength of 525 nm passing through the lens 310 of this embodiment. Figure 8 and Fig. 9It can be seen that the lens 310 provided in this embodiment controls the field curvature and distortion within a corresponding range, and can meet the usage requirements.

[0170] Embodiment three:

[0171] Fig.10 This is a schematic diagram of the structure of the third display module 300 provided in the embodiment of the present application. Fig.10 As shown, the display module 300 provided in the third embodiment includes a lens 310, an aperture 30, a cover glass 20 and a projection chip 320. The cover glass 20 is disposed between the projection chip 320 and the lens 310. Along the direction of the optical axis from the image side to the object side, the lens 310 includes a first lens 11, a second lens 12, a third lens 13, a fourth lens 14 and a fifth lens 15, the first lens 11 is closest to the image side, the fifth lens 15 is closest to the object side, and the aperture 30 is disposed between the second lens 12 and the third lens 13.

[0172] The first lens 11 has positive power, and the ratio of the focal length f1 of the first lens 11 to the focal length EFL of the lens 310 is: |f1 / EFL|=1.541. The second lens 12 has negative power, and the ratio of the focal length f2 of the second lens 12 to the focal length EFL of the lens 310 is: |f2 / EFL|=0.6. The third lens 13 has negative power, and the ratio of the focal length f3 of the third lens 13 to the focal length EFL of the lens 310 is: |f3 / EFL|=2.621. The fourth lens 14 has positive power, and the ratio of the focal length f4 of the third lens 13 to the focal length EFL of the lens 310 is: |f4 / EFL|=0.871. The fifth lens 15 has positive power, and the ratio of the focal length f5 of the fourth lens 14 to the focal length EFL of the lens 310 is: |f5 / EFL|=1.550.

[0173] Among them, the ratio of the curvature radius of the image side surface of the lens closest to the image side in the lens 310 to the focal length of the lens 310 is: R1 / EFL=1.932, which is greater than 1.7 and less than 5.72, meeting the requirements. The curvature radius of the image side surface of the lens closest to the image side in the lens 310 is 69.559 mm, which is greater than 64.5 mm and less than 200 mm, meeting the requirements.

[0174] Among them, the ratio of the curvature radius of the object side surface of the lens closest to the object side in the lens 310 to the focal length of the lens 310 is: R2 / EFL=-23.611, which is greater than -23 and less than 11.2, meeting the requirements. The curvature radius of the object side surface of the lens closest to the object side in the lens 310 is R2=-850mm, which is greater than -860mm and less than 385mm, meeting the requirements.

[0175] The focal length EFL of the lens 310 is 35.99 mm, which is greater than 33 mm and less than 38 mm, meeting the requirement. The ratio of the back focal length BFL of the lens 310 to the focal length EFL is: BFL / EFL=1.054, which is greater than 0.9 and less than 1.15, meeting the requirement.

[0176] Table 5 shows the optical parameters of each optical element in the display module 300 provided in the third embodiment.

[0177]

[0178] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the aperture 30, L4 is the third lens 13, L5 is the fourth lens 14, L6 is the fifth lens 15, L7 is the glass cover, OBJ is the projection plane (object plane), and ImgH is the imaging plane.

[0179] R is the radius of curvature of the optical element (such as a lens or a glass cover, etc.) at the corresponding position of the optical axis.

[0180] Th is the surface thickness of the optical element along the optical axis.

[0181] Nd is the refractive index of each optical element when d-ray is irradiated.

[0182] Vd is the Abbe number of the optical element.

[0183] Table 6 shows the optical parameters of the lens 310 provided in the third embodiment.

[0184]

[0185]

[0186] Among them, EFL is the focal length of the lens 310, FOV is the maximum field of view of the lens 310, Fno is the aperture of the lens 310, BFL is the back focal length of the lens 310, R1 is the curvature radius of the image side surface of the lens closest to the image side in the lens 310, R2 is the curvature radius of the object side surface of the lens closest to the object side in the lens 310, f1 is the focal length of the first lens 11, f2 is the focal length of the second lens 12, f3 is the focal length of the third lens 13, f4 is the focal length of the fourth lens 14, and f5 is the focal length of the fifth lens 15.

[0187] Fig.11 for Fig.10 Spherical aberration diagram of lens 310 in FIG. Fig.11 In the figure, the ordinate represents the normalized pupil coordinate, and the abscissa represents the aberration in the axial direction, in millimeters. Fig.11In FIG. 1 , A corresponds to the axial aberration curve of light with a wavelength of 525 nm after passing through the lens 310 of this embodiment, B corresponds to the axial aberration curve of light with a wavelength of 617 nm after passing through the lens 310 of this embodiment, and C corresponds to the axial aberration curve of light with a wavelength of 460 nm after passing through the lens 310 of this embodiment. Fig.11 It can be seen that in this embodiment, the axial aberration is controlled within a very small range and is well corrected.

[0188] Fig.12 for Fig.10 The astigmatism field curvature diagram of the lens 310 in FIG. Fig.13 for Fig.10 Distortion diagram of lens 310 in FIG. Fig.12 In , S represents the field curvature value of the light with a wavelength of 525nm on the meridional image plane, and T represents the field curvature value of the light with a wavelength of 525nm on the sagittal image plane. Fig.13 In FIG. 1 , the solid line represents the distortion value of light having a central wavelength of 525 nm passing through the lens 310 of this embodiment. Fig.12 and Fig.13 It can be seen that the lens 310 provided in this embodiment controls the field curvature and distortion within a corresponding range, and can meet the usage requirements.

[0189] Embodiment 4:

[0190] Fig.14 This is a schematic diagram of the structure of the fourth display module 300 provided in the embodiment of the present application. Fig.14 As shown, the display module 300 provided in the fourth embodiment includes a lens 310, an aperture 30, a cover glass 20 and a projection chip 320. The cover glass 20 is disposed between the projection chip 320 and the lens 310. Along the direction of the optical axis from the image side to the object side, the lens 310 includes a first lens 11, a second lens 12, a third lens 13, a fourth lens 14 and a fifth lens 15, the first lens 11 is closest to the image side, the fifth lens 15 is closest to the object side, and the aperture 30 is disposed between the second lens 12 and the third lens 13.

[0191] The first lens 11 has positive power, and the ratio of the focal length f1 of the first lens 11 to the focal length EFL of the lens 310 is: |f1 / EFL|=1.555. The second lens 12 has negative power, and the ratio of the focal length f2 of the second lens 12 to the focal length EFL of the lens 310 is: |f2 / EFL|=0.635. The third lens 13 has negative power, and the ratio of the focal length f3 of the third lens 13 to the focal length EFL of the lens 310 is: |f3 / EFL|=2.923. The fourth lens 14 has positive power, and the ratio of the focal length f4 of the third lens 13 to the focal length EFL of the lens 310 is: |f4 / EFL|=0.924. The fifth lens 15 has positive power, and the ratio of the focal length f5 of the fourth lens 14 to the focal length EFL of the lens 310 is: |f5 / EFL|=1.546.

[0192] Among them, the ratio of the curvature radius of the image side surface of the lens closest to the image side in the lens 310 to the focal length of the lens 310 is: R1 / EFL=1.984, which is greater than 1.7 and less than 5.72, meeting the requirements. The curvature radius of the image side surface of the lens closest to the image side in the lens 310 is 69.559 mm, which is greater than 64.5 mm and less than 200 mm, meeting the requirements.

[0193] Among them, the ratio of the curvature radius of the object side surface of the lens closest to the object side in the lens 310 to the focal length of the lens 310 is: R2 / EFL=-23.611, which is greater than -23 and less than 11.2, meeting the requirements. The curvature radius of the object side surface of the lens closest to the object side in the lens 310 is R2=-850mm, which is greater than -860mm and less than 385mm, meeting the requirements.

[0194] The focal length EFL of the lens 310 is 35.99 mm, which is greater than 33 mm and less than 38 mm, meeting the requirement. The ratio of the back focal length BFL of the lens 310 to the focal length EFL is: BFL / EFL=1.054, which is greater than 0.9 and less than 1.15, meeting the requirement.

[0195] Table 7 shows the optical parameters of each optical element in the display module 300 provided in the fourth embodiment.

[0196]

[0197]

[0198] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the aperture 30, L4 is the third lens 13, L5 is the fourth lens 14, L6 is the fifth lens 15, L7 is the glass cover, OBJ is the projection plane (object plane), and ImgH is the imaging plane.

[0199] R is the radius of curvature of the optical element (such as a lens or a glass cover, etc.) at the corresponding position of the optical axis.

[0200] Th is the surface thickness of the optical element along the optical axis.

[0201] Nd is the refractive index of each optical element when d-ray is irradiated.

[0202] Vd is the Abbe number of the optical element.

[0203] Table 8 shows the optical parameters of the lens 310 provided in the fourth embodiment.

[0204] f1(mm) 55.489 EFL(mm) 35.99 f2(mm) -21.592 TTL(mm) 90 f3(mm) -94.376 Fno 1.36 f4(mm) 31.363 BFL(mm) 37.948 f5(mm) 55.787 R1(mm) 69.559 R2(mm) -850 FOV(°) 22.3

[0205] Among them, EFL is the focal length of the lens 310, FOV is the maximum field of view of the lens 310, Fno is the aperture of the lens 310, BFL is the back focal length of the lens 310, R1 is the curvature radius of the image side surface of the lens closest to the image side in the lens 310, R2 is the curvature radius of the object side surface of the lens closest to the object side in the lens 310, f1 is the focal length of the first lens 11, f2 is the focal length of the second lens 12, f3 is the focal length of the third lens 13, f4 is the focal length of the fourth lens 14, and f5 is the focal length of the fifth lens 15.

[0206] Fig.15 for Fig.14 Spherical aberration diagram of lens 310 in FIG. Fig.15 In the figure, the ordinate represents the normalized pupil coordinate, and the abscissa represents the aberration in the axial direction, in millimeters. Fig.15 In FIG. 1 , A corresponds to the axial aberration curve of light with a wavelength of 525 nm after passing through the lens 310 of this embodiment, B corresponds to the axial aberration curve of light with a wavelength of 617 nm after passing through the lens 310 of this embodiment, and C corresponds to the axial aberration curve of light with a wavelength of 460 nm after passing through the lens 310 of this embodiment. Fig.15 It can be seen that in this embodiment, the axial aberration is controlled within a very small range and is well corrected.

[0207] Fig.16 for Fig.14 The astigmatism field curvature diagram of the lens 310 in FIG. Fig.17 for Fig.14 Distortion diagram of lens 310 in FIG. Fig.16 In , S represents the field curvature value of the light with a wavelength of 525nm on the meridional image plane, and T represents the field curvature value of the light with a wavelength of 525nm on the sagittal image plane. Fig.17 In FIG. 1 , the solid line represents the distortion value of light having a central wavelength of 525 nm passing through the lens 310 of this embodiment. Fig.16 and Fig.17It can be seen that the lens 310 provided in this embodiment controls the field curvature and distortion within a corresponding range, and can meet the usage requirements.

[0208] Embodiment five:

[0209] Fig.18 This is a schematic diagram of the structure of the fifth display module 300 provided in the embodiment of the present application. Fig.18 As shown, the display module 300 provided in the fifth embodiment includes a lens 310, an aperture 30, a cover glass 20 and a projection chip 320. The cover glass 20 is disposed between the projection chip 320 and the lens 310. Along the direction of the optical axis from the image side to the object side, the lens 310 includes a first lens 11, a second lens 12, a third lens 13, a fourth lens 14 and a fifth lens 15, the first lens 11 is closest to the image side, the fifth lens 15 is closest to the object side, and the aperture 30 is disposed between the second lens 12 and the third lens 13.

[0210] The first lens 11 has positive power, and the ratio of the focal length f1 of the first lens 11 to the focal length EFL of the lens 310 is: |f1 / EFL|=1.833. The second lens 12 has negative power, and the ratio of the focal length f2 of the second lens 12 to the focal length EFL of the lens 310 is: |f2 / EFL|=0.610. The third lens 13 has negative power, and the ratio of the focal length f3 of the third lens 13 to the focal length EFL of the lens 310 is: |f3 / EFL|=2.026. The fourth lens 14 has positive power, and the ratio of the focal length f4 of the third lens 13 to the focal length EFL of the lens 310 is: |f4 / EFL|=0.760. The fifth lens 15 has positive power, and the ratio of the focal length f5 of the fourth lens 14 to the focal length EFL of the lens 310 is: |f5 / EFL|=1.732.

[0211] Among them, the ratio of the curvature radius of the image side surface of the lens closest to the image side in the lens 310 to the focal length of the lens 310 is: R1 / EFL=2.75, which is greater than 1.7 and less than 5.72, meeting the requirements. The curvature radius of the image side surface of the lens closest to the image side in the lens 310 is 99 mm, which is greater than 64.5 mm and less than 200 mm, meeting the requirements.

[0212] Among them, the ratio of the curvature radius of the object side surface of the lens closest to the object side in the lens 310 to the focal length of the lens 310 is: R2 / EFL=3.60, which is greater than -23 and less than 11.2, meeting the requirements. The curvature radius of the object side surface of the lens closest to the object side in the lens 310 is R2=129mm, which is greater than -860mm and less than 385mm, meeting the requirements.

[0213] The focal length EFL of the lens 310 is 35.997 mm, which is greater than 33 mm and less than 38 mm, meeting the requirement. The ratio of the back focal length BFL of the lens 310 to the focal length EFL is: BFL / EFL=1.054, which is greater than 0.9 and less than 1.15, meeting the requirement.

[0214] Table 9 shows the optical parameters of each optical element in the display module 300 provided in the fifth embodiment.

[0215]

[0216] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the aperture 30, L4 is the third lens 13, L5 is the fourth lens 14, L6 is the fifth lens 15, L7 is the glass cover, OBJ is the projection plane (object plane), and ImgH is the imaging plane.

[0217] R is the radius of curvature of the optical element (such as a lens or a glass cover, etc.) at the corresponding position of the optical axis.

[0218] Th is the surface thickness of the optical element along the optical axis.

[0219] Nd is the refractive index of each optical element when d-ray is irradiated.

[0220] Vd is the Abbe number of the optical element.

[0221] Table 10 shows the optical parameters of the lens 310 provided in the fifth embodiment.

[0222] f1(mm) 65.972 EFL(mm) 35.997 f2(mm) -21.923 TTL(mm) 90 f3(mm) -72.941 Fno 1.36 f4(mm) 27.349 BFL(mm) 37.948 f5(mm) 62.323 R1(mm) 99 R2(mm) 129 FOV(°) 22.3

[0223] Among them, EFL is the focal length of the lens 310, FOV is the maximum field of view of the lens 310, Fno is the aperture of the lens 310, BFL is the back focal length of the lens 310, R1 is the curvature radius of the image side surface of the lens closest to the image side in the lens 310, R2 is the curvature radius of the object side surface of the lens closest to the object side in the lens 310, f1 is the focal length of the first lens 11, f2 is the focal length of the second lens 12, f3 is the focal length of the third lens 13, f4 is the focal length of the fourth lens 14, and f5 is the focal length of the fifth lens 15.

[0224] Fig.19 for Fig.18 Spherical aberration diagram of lens 310 in FIG. Fig.19 In the figure, the ordinate represents the normalized pupil coordinate, and the abscissa represents the aberration in the axial direction, in millimeters. Fig.19In FIG. 1 , A corresponds to the axial aberration curve of light with a wavelength of 525 nm after passing through the lens 310 of this embodiment, B corresponds to the axial aberration curve of light with a wavelength of 617 nm after passing through the lens 310 of this embodiment, and C corresponds to the axial aberration curve of light with a wavelength of 460 nm after passing through the lens 310 of this embodiment. Fig.19 It can be seen that in this embodiment, the axial aberration is controlled within a very small range and is well corrected.

[0225] Fig. 20 for Fig.18 The astigmatism field curvature diagram of the lens 310 in FIG. Fig.21 for Fig.18 Distortion diagram of lens 310 in FIG. Fig. 20 In , S represents the field curvature value of the light with a wavelength of 525nm on the meridional image plane, and T represents the field curvature value of the light with a wavelength of 525nm on the sagittal image plane. Fig.21 In FIG. 1 , the solid line represents the distortion value of light having a central wavelength of 525 nm passing through the lens 310 of this embodiment. Fig. 20 and Fig.21 It can be seen that the lens 310 provided in this embodiment controls the field curvature and distortion within a corresponding range, and can meet the usage requirements.

[0226] Embodiment six:

[0227] Fig. 22 This is a schematic diagram of the structure of the fifth display module 300 provided in the embodiment of the present application. Fig. 22 As shown, the display module 300 provided in the sixth embodiment includes a lens 310, an aperture 30, a cover glass 20 and a projection chip 320. The cover glass 20 is disposed between the projection chip 320 and the lens 310. Along the direction of the optical axis from the image side to the object side, the lens 310 includes a first lens 11, a second lens 12, a third lens 13, a fourth lens 14 and a fifth lens 15, the first lens 11 is closest to the image side, the fifth lens 15 is closest to the object side, and the aperture 30 is disposed between the second lens 12 and the third lens 13.

[0228] The first lens 11 has positive power, and the ratio of the focal length f1 of the first lens 11 to the focal length EFL of the lens 310 is: |f1 / EFL|=1.903. The second lens 12 has negative power, and the ratio of the focal length f2 of the second lens 12 to the focal length EFL of the lens 310 is: |f2 / EFL|=0.685. The third lens 13 has negative power, and the ratio of the focal length f3 of the third lens 13 to the focal length EFL of the lens 310 is: |f3 / EFL|=3.927. The fourth lens 14 has positive power, and the ratio of the focal length f4 of the third lens 13 to the focal length EFL of the lens 310 is: |f4 / EFL|=0.934. The fifth lens 15 has positive power, and the ratio of the focal length f5 of the fourth lens 14 to the focal length EFL of the lens 310 is: |f5 / EFL|=1.670.

[0229] Among them, the ratio of the curvature radius of the image side surface of the lens closest to the image side in the lens 310 to the focal length of the lens 310 is: R1 / EFL=2.892, which is greater than 1.7 and less than 5.72, meeting the requirements. The curvature radius of the image side surface of the lens closest to the image side in the lens 310 is 99 mm, which is greater than 64.5 mm and less than 200 mm, meeting the requirements.

[0230] Among them, the ratio of the curvature radius of the object side surface of the lens closest to the object side in the lens 310 to the focal length of the lens 310 is: R2 / EFL=10.22, which is greater than -23 and less than 11.2, and meets the requirements. The curvature radius of the object side surface of the lens closest to the object side in the lens 310 is R2=350mm, which is greater than -860mm and less than 385mm, and meets the requirements.

[0231] The focal length EFL of the lens 310 is 34.23 mm, which is greater than 33 mm and less than 38 mm, meeting the requirement. The ratio of the back focal length BFL of the lens 310 to the focal length EFL is: BFL / EFL=1.108, which is greater than 0.9 and less than 1.15, meeting the requirement.

[0232] Table 11 shows the optical parameters of each optical element in the display module 300 provided in the sixth embodiment.

[0233]

[0234] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the aperture 30, L4 is the third lens 13, L5 is the fourth lens 14, L6 is the fifth lens 15, L7 is the glass cover, OBJ is the projection plane (object plane), and ImgH is the imaging plane.

[0235] R is the radius of curvature of the optical element (such as a lens or a glass cover, etc.) at the corresponding position of the optical axis.

[0236] Th is the surface thickness of the optical element along the optical axis.

[0237] Nd is the refractive index of each optical element when d-ray is irradiated.

[0238] Vd is the Abbe number of the optical element.

[0239] Table 12 shows the optical parameters of the lens 310 provided in the sixth embodiment.

[0240]

[0241]

[0242] Among them, EFL is the focal length of the lens 310, FOV is the maximum field of view of the lens 310, Fno is the aperture of the lens 310, BFL is the back focal length of the lens 310, R1 is the curvature radius of the image side surface of the lens closest to the image side in the lens 310, R2 is the curvature radius of the object side surface of the lens closest to the object side in the lens 310, f1 is the focal length of the first lens 11, f2 is the focal length of the second lens 12, f3 is the focal length of the third lens 13, f4 is the focal length of the fourth lens 14, and f5 is the focal length of the fifth lens 15.

[0243] Fig.23 for Fig. 22 Spherical aberration diagram of lens 310 in FIG. Fig.23 In the figure, the ordinate represents the normalized pupil coordinate, and the abscissa represents the aberration in the axial direction, in millimeters. Fig.23 In FIG. 1 , A corresponds to the axial aberration curve of light with a wavelength of 525 nm after passing through the lens 310 of this embodiment, B corresponds to the axial aberration curve of light with a wavelength of 617 nm after passing through the lens 310 of this embodiment, and C corresponds to the axial aberration curve of light with a wavelength of 460 nm after passing through the lens 310 of this embodiment. Fig.23 It can be seen that in this embodiment, the axial aberration is controlled within a very small range and is well corrected.

[0244] Fig.24 for Fig. 22 The astigmatism field curvature diagram of the lens 310 in FIG. Fig.25 for Fig. 22 Distortion diagram of lens 310 in FIG. Fig.24 In , S represents the field curvature value of the light with a wavelength of 525nm on the meridional image plane, and T represents the field curvature value of the light with a wavelength of 525nm on the sagittal image plane. Fig.25 In FIG. 1 , the solid line represents the distortion value of light having a central wavelength of 525 nm passing through the lens 310 of this embodiment. Fig.24 and Fig.25It can be seen that the lens 310 provided in this embodiment controls the field curvature and distortion within a corresponding range, and can meet the usage requirements.

[0245] Embodiment seven:

[0246] Fig.26 This is a schematic diagram of the structure of the sixth display module 300 provided in the embodiment of the present application. Fig.26 As shown, the display module 300 provided in the seventh embodiment includes a lens 310, an aperture 30, a cover glass 20 and a projection chip 320. The cover glass 20 is disposed between the projection chip 320 and the lens 310. Along the direction of the optical axis from the image side to the object side, the lens 310 includes a first lens 11, a second lens 12, a third lens 13, a fourth lens 14 and a fifth lens 15, the first lens 11 is closest to the image side, the fifth lens 15 is closest to the object side, and the aperture 30 is disposed between the second lens 12 and the third lens 13.

[0247] The first lens 11 has positive power, and the ratio of the focal length f1 of the first lens 11 to the focal length EFL of the lens 310 is: |f1 / EFL|=1.933. The second lens 12 has negative power, and the ratio of the focal length f2 of the second lens 12 to the focal length EFL of the lens 310 is: |f2 / EFL|=0.751. The third lens 13 has negative power, and the ratio of the focal length f3 of the third lens 13 to the focal length EFL of the lens 310 is: |f3 / EFL|=2.73. The fourth lens 14 has positive power, and the ratio of the focal length f4 of the third lens 13 to the focal length EFL of the lens 310 is: |f4 / EFL|=0.907. The fifth lens 15 has positive power, and the ratio of the focal length f5 of the fourth lens 14 to the focal length EFL of the lens 310 is: |f5 / EFL|=1.627.

[0248] Among them, the ratio of the curvature radius of the image side surface of the lens closest to the image side in the lens 310 to the focal length of the lens 310 is: R1 / EFL=2.808, which is greater than 1.7 and less than 5.72, meeting the requirements. The curvature radius of the image side surface of the lens closest to the image side in the lens 310 is 99 mm, which is greater than 64.5 mm and less than 200 mm, meeting the requirements.

[0249] Among them, the ratio of the curvature radius of the object side surface of the lens closest to the object side in the lens 310 to the focal length of the lens 310 is: R2 / EFL=9.928, which is greater than -23 and less than 11.2, meeting the requirements. The curvature radius of the object side surface of the lens closest to the object side in the lens 310 is R2=350mm, which is greater than -860mm and less than 385mm, meeting the requirements.

[0250] The focal length EFL of the lens 310 is 35.23 mm, which is greater than 33 mm and less than 38 mm, meeting the requirement. The ratio of the back focal length BFL of the lens 310 to the focal length EFL is: BFL / EFL=1.076, which is greater than 0.9 and less than 1.15, meeting the requirement.

[0251] Table 13 shows the optical parameters of each optical element in the display module 300 provided in the seventh embodiment.

[0252]

[0253]

[0254] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the aperture 30, L4 is the third lens 13, L5 is the fourth lens 14, L6 is the fifth lens 15, L7 is the glass cover, OBJ is the projection plane (object plane), and ImgH is the imaging plane.

[0255] R is the radius of curvature of the optical element (such as a lens or a glass cover, etc.) at the corresponding position of the optical axis.

[0256] Th is the surface thickness of the optical element along the optical axis.

[0257] Nd is the refractive index of each optical element when d-ray is irradiated.

[0258] Vd is the Abbe number of the optical element.

[0259] Table 14 shows the optical parameters of the lens 310 provided in the seventh embodiment.

[0260] f1(mm) 68.140 EFL(mm) 35.23 f2(mm) -26.456 TTL(mm) 90 f3(mm) -96.240 Fno 1.292 f4(mm) 31.968 BFL(mm) 37.948 f5(mm) 57.355 R1(mm) 99 R2(mm) 350 FOV(°) 22.3

[0261] Among them, EFL is the focal length of the lens 310, FOV is the maximum field of view of the lens 310, Fno is the aperture of the lens 310, BFL is the back focal length of the lens 310, R1 is the curvature radius of the image side surface of the lens closest to the image side in the lens 310, R2 is the curvature radius of the object side surface of the lens closest to the object side in the lens 310, f1 is the focal length of the first lens 11, f2 is the focal length of the second lens 12, f3 is the focal length of the third lens 13, f4 is the focal length of the fourth lens 14, and f5 is the focal length of the fifth lens 15.

[0262] Fig. 27 for Fig.26 Spherical aberration diagram of lens 310 in FIG. Fig. 27 In the figure, the ordinate represents the normalized pupil coordinate, and the abscissa represents the aberration in the axial direction, in millimeters. Fig. 27In FIG. 1 , A corresponds to the axial aberration curve of light with a wavelength of 525 nm after passing through the lens 310 of this embodiment, B corresponds to the axial aberration curve of light with a wavelength of 617 nm after passing through the lens 310 of this embodiment, and C corresponds to the axial aberration curve of light with a wavelength of 460 nm after passing through the lens 310 of this embodiment. Fig. 27 It can be seen that in this embodiment, the axial aberration is controlled within a very small range and is well corrected.

[0263] Fig.28 for Fig.26 The astigmatism field curvature diagram of the lens 310 in FIG. Fig.29 for Fig.26 Distortion diagram of lens 310 in FIG. Fig.28 In , S represents the field curvature value of the light with a wavelength of 525nm on the meridional image plane, and T represents the field curvature value of the light with a wavelength of 525nm on the sagittal image plane. Fig.29 In FIG. 1 , the solid line represents the distortion value of light having a central wavelength of 525 nm passing through the lens 310 of this embodiment. Fig.28 and Fig.29 It can be seen that the lens 310 provided in this embodiment controls the field curvature and distortion within a corresponding range, and can meet the usage requirements.

[0264] Embodiment eight:

[0265] Fig.30 This is a schematic diagram of the structure of the eighth display module 300 provided in the embodiment of the present application. Fig.30 As shown, the display module 300 provided in the eighth embodiment includes a lens 310, an aperture 30, a cover glass 20 and a projection chip 320. The cover glass 20 is disposed between the projection chip 320 and the lens 310. Along the direction of the optical axis from the image side to the object side, the lens 310 includes a first lens 11, a second lens 12, a third lens 13, a fourth lens 14 and a fifth lens 15, the first lens 11 is closest to the image side, the fifth lens 15 is closest to the object side, and the aperture 30 is disposed between the second lens 12 and the third lens 13.

[0266] The first lens 11 has positive power, and the ratio of the focal length f1 of the first lens 11 to the focal length EFL of the lens 310 is: |f1 / EFL|=1.910. The second lens 12 has negative power, and the ratio of the focal length f2 of the second lens 12 to the focal length EFL of the lens 310 is: |f2 / EFL|=0.684. The third lens 13 has negative power, and the ratio of the focal length f3 of the third lens 13 to the focal length EFL of the lens 310 is: |f3 / EFL|=4. The fourth lens 14 has positive power, and the ratio of the focal length f4 of the third lens 13 to the focal length EFL of the lens 310 is: |f4 / EFL|=0.9355. The fifth lens 15 has positive power, and the ratio of the focal length f5 of the fourth lens 14 to the focal length EFL of the lens 310 is: |f5 / EFL|=1.6924.

[0267] Among them, the ratio of the curvature radius of the image side surface of the lens closest to the image side in the lens 310 to the focal length of the lens 310 is: R1 / EFL=2.892, which is greater than 1.7 and less than 5.72, meeting the requirements. The curvature radius of the image side surface of the lens closest to the image side in the lens 310 is 99 mm, which is greater than 64.5 mm and less than 200 mm, meeting the requirements.

[0268] Among them, the ratio of the curvature radius of the object side surface of the lens closest to the object side in the lens 310 to the focal length of the lens 310 is: R2 / EFL=11.0986, which is greater than -23 and less than 11.2, meeting the requirements. The curvature radius of the object side surface of the lens closest to the object side in the lens 310 is R2=380mm, which is greater than -860mm and less than 385mm, meeting the requirements.

[0269] The focal length EFL of the lens 310 is 34.239 mm, which is greater than 33 mm and less than 38 mm, meeting the requirement. The ratio of the back focal length BFL of the lens 310 to the focal length EFL is: BFL / EFL=1.083, which is greater than 0.9 and less than 1.15, meeting the requirement.

[0270] Table 15 shows the optical parameters of each optical element in the display module 300 provided in the eighth embodiment.

[0271]

[0272] Among them, L1 is the first lens 11, L2 is the second lens 12, L3 is the aperture 30, L4 is the third lens 13, L5 is the fourth lens 14, L6 is the fifth lens 15, L7 is the glass cover, OBJ is the projection plane (object plane), and ImgH is the imaging plane.

[0273] R is the radius of curvature of the optical element (such as a lens or a glass cover, etc.) at the corresponding position of the optical axis.

[0274] Th is the surface thickness of the optical element along the optical axis.

[0275] Nd is the refractive index of each optical element when d-ray is irradiated.

[0276] Vd is the Abbe number of the optical element.

[0277] Table 16 shows the optical parameters of the lens 310 provided in the eighth embodiment.

[0278] f1(mm) 65.391 EFL(mm) 34.239 f2(mm) -23.424 TTL(mm) 90 f3(mm) -136.942 Fno 1.295 f4(mm) 32.030 BFL(mm) 37.948 f5(mm) 57.946 R1(mm) 99 R2(mm) 380 FOV(°) 22.3

[0279] Among them, EFL is the focal length of the lens 310, FOV is the maximum field of view of the lens 310, Fno is the aperture of the lens 310, BFL is the back focal length of the lens 310, R1 is the curvature radius of the image side surface of the lens closest to the image side in the lens 310, R2 is the curvature radius of the object side surface of the lens closest to the object side in the lens 310, f1 is the focal length of the first lens 11, f2 is the focal length of the second lens 12, f3 is the focal length of the third lens 13, f4 is the focal length of the fourth lens 14, and f5 is the focal length of the fifth lens 15.

[0280] Fig.31 for Fig.30 Spherical aberration diagram of lens 310 in FIG. Fig.31 In the figure, the ordinate represents the normalized pupil coordinate, and the abscissa represents the aberration in the axial direction, in millimeters. Fig.31 In FIG. 1 , A corresponds to the axial aberration curve of light with a wavelength of 525 nm after passing through the lens 310 of this embodiment, B corresponds to the axial aberration curve of light with a wavelength of 617 nm after passing through the lens 310 of this embodiment, and C corresponds to the axial aberration curve of light with a wavelength of 460 nm after passing through the lens 310 of this embodiment. Fig.31 It can be seen that in this embodiment, the axial aberration is controlled within a very small range and is well corrected.

[0281] Fig.32 for Fig.30 The astigmatism field curvature diagram of the lens 310 in FIG. Fig.33 for Fig.30 Distortion diagram of lens 310 in FIG. Fig.32 In , S represents the field curvature value of the light with a wavelength of 525nm on the meridional image plane, and T represents the field curvature value of the light with a wavelength of 525nm on the sagittal image plane. Fig.33 In FIG. 1 , the solid line represents the distortion value of light having a central wavelength of 525 nm passing through the lens 310 of this embodiment. Fig.32 and Fig.33 It can be seen that the lens 310 provided in this embodiment controls the field curvature and distortion within a corresponding range, and can meet the usage requirements.

[0282] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0283] In the embodiments of the present application, the devices or elements referred to or implied must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise precisely and specifically specified.

[0284] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0285] The term "plurality" in this article refers to two or more than two. The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship; in a formula, the character " / " indicates that the previous and next associated objects are in a "division" relationship.

[0286] It should be understood that the various numerical numbers involved in the embodiments of the present application are only used for the convenience of description and are not used to limit the scope of the embodiments of the present application.

[0287] It can be understood that in the embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Claims

1. A lens, characterized in that: The invention comprises at least five lenses arranged from the image side to the object side along the optical axis; At least three of the at least five lenses have positive optical power, and at least one of the lenses has negative optical power, wherein: When the number of the lenses with negative optical power in the lens is one, along the optical axis direction, the lens with negative optical power is arranged between the lens closest to the image side and the lens closest to the object side in the lens.

2. The lens according to claim 1, characterized in that: The lens satisfies the relationship: 33mm<EFL<38mm, wherein the EFL is the focal length of the lens.

3. The lens according to claim 1 or 2, characterized in that: The lens satisfies the relationship: 1.7<R1 / EFL<5.72, wherein R1 is the radius of curvature of the image side surface of the lens closest to the image side along the optical axis direction in the lens.

4. The lens according to any one of claims 1 to 3, characterized in that: The lens satisfies the relationship: 64.5 mm<R1<200 mm, wherein R1 is the radius of curvature of the image side surface of the lens closest to the image side along the optical axis direction in the lens.

5. The lens according to any one of claims 1 to 4, characterized in that: The lens satisfies the relationship: -23<R2 / EFL<11.2, wherein R2 is the radius of curvature of the object side surface of the lens closest to the object side along the optical axis direction in the lens.

6. The lens according to any one of claims 1 to 5, characterized in that: The lens satisfies the relationship: -860mm<R2<385mm, wherein R2 is the radius of curvature of the object side surface of the lens closest to the object side along the optical axis direction in the lens.

7. The lens according to any one of claims 1 to 6, characterized in that: The lens satisfies the relationship: 0.9<BFL / EFL<1.15, wherein the BFL is the back focal length of the lens.

8. The lens according to any one of claims 1 to 7, characterized in that: Along the optical axis direction, the lens closest to the image side in the lens has positive refractive power.

9. The lens according to any one of claims 1 to 8, characterized in that: Along the optical axis direction, the lens element closest to the object side in the lens has positive refractive power.

10. The lens according to any one of claims 1 to 9, characterized in that: At least one of the lenses is a spherical lens.

11. A display module, characterized in that: The invention comprises a projection chip and a lens as claimed in any one of claims 1 to 10.

12. A vehicle lamp device, characterized in that: It comprises a light source and the display module as claimed in claim 11.

13. An electronic device, characterized in that: Comprising the display module as claimed in claim 11.

14. A means of transport, characterized in that: Includes the display module as claimed in claim 11 or includes the vehicle lighting device as claimed in claim 12.

Images