Fog lamp and optical system thereof and vehicle with fog lamp

Abstract

The present invention provides a fog lamp and an optical system thereof and a vehicle with the fog lamp, wherein the fog lamp comprises a lamp housing, a circuit board arranged on the lamp housing and an optical system. The optical system comprises a light source and an optical lens, wherein the optical lens comprises a lens body and a light incident portion and a light exit portion formed on the lens body, a virtual central axis is defined by the optical lens, wherein the light incident portion of the optical lens has a cylindrical surface characteristic of being concave inward based on the central axis, and the light incident portion of the optical lens faces the light source, wherein the light emitted by the light source is collected by the light incident portion of the optical lens and refracted into the lens body, the light reaches the light exit portion of the optical lens through the lens body, and is refracted and diffused by the light exit portion to form a searchlight path.

Description

Technical Field

[0001] The invention relates to the field of lighting, in particular to a fog lamp and an optical system thereof and a vehicle with the fog lamp. Background Art

[0002] Front fog lights are installed at the front of the car to illuminate the road and provide safety warnings in bad weather such as rain, fog, dust and haze, improving the visibility of the driver and surrounding traffic participants. Because visibility is low in rain, fog, dust and haze, the driver's vision is limited, and lights can increase the driving distance, especially the yellow anti-fog lights have strong light penetration, which can improve the visibility of the driver and surrounding traffic participants, allowing oncoming vehicles and pedestrians to see each other from a distance.

[0003] The vehicle fog lamp of the prior art adopts halogen bulb as the light source, but the service life and energy consumption of halogen bulb are relatively large. With the popularization and application of LED in the automotive field, many brands of cars on the market adopt LED fog lamp. Figure 1 This is the light intensity test light distribution diagram for ECER19 fog lamp F3. The LED fog lamp needs to meet the test light intensity standard requirements and test light distribution. It cannot have excessive light intensity that affects the driving of the vehicle in front, and it must also ensure that the front fog lamp has a wide enough field of view and light uniformity.

[0004] Figure 2 An LED fog lamp of the prior art is explained, wherein the LED fog lamp adopts the optical reflection principle, and the LED fog lamp comprises an LED light source 10p, a metal circuit board 20p, a tortoise-plate reflective bowl 30p, and a heat sink 40p, wherein the LED light source 10p is welded to the metal circuit board 20p, and the metal circuit board 20p is fixed to the heat sink 40p, wherein the sheet structure of the tortoise-plate reflective bowl 30p reflects the light emitted by the LED light source 10p to form a light spot. The LED fog lamp of the prior art needs to adopt a vacuum aluminum plating process to form the surface of the tortoise-plate reflective bowl 30p, and the vacuum aluminum plating process has certain pollution to the environment. In addition, the cutoff line of the front fog light spot formed by reflection needs to have sufficient clarity, which requires a sufficient distance between the tortoise-plate reflective bowl 30p and the LED light source 10p, which results in part of the light being unable to be collected and utilized by the tortoise-plate reflective bowl 30p and being wasted. In addition, the tortoise-plate reflective bowl 30p reflects light in a manner such that the light direction emitted by the LED light source 10p needs to be perpendicular to the direction of travel of the vehicle, or at a certain angle, and the heat sink 40p needs to be placed above the LED, which is not conducive to the aluminum shell design of the heat sink of the entire lamp.

[0005] The existing LED fog lamps still have the following problems: low light collection efficiency and serious waste of light resources, which leads to insufficient light brightness and affects normal lighting use. The light emitted by the LED light source is a combination of blue light and yellow light. When the two different light rays pass through the optical lens, the refractive index of the same material is different, so the blue and yellow overflow problems are relatively serious. Summary of the invention

[0006] A major advantage of the present invention is that it provides a fog lamp and its optical system and a vehicle with a fog lamp, wherein a light beam generated by a light source of the optical system is refracted and projected outward by an optical lens, which is beneficial to reducing the distance between the optical lens and the light source and facilitating the miniaturization of the fog lamp.

[0007] Another advantage of the present invention is to provide a fog lamp and its optical system and a vehicle with the fog lamp, wherein the optical lens can improve the utilization rate of the light beam generated by the light source and reduce the waste of light resources, thereby facilitating improving the lighting brightness of the fog lamp.

[0008] Another advantage of the present invention is to provide a fog lamp and its optical system and a vehicle with the fog lamp, wherein the light source of the fog lamp is an LED light source, and the optical lens collects and refracts the light generated by the light source to form sufficient light intensity and width to meet the standard requirements of the front fog lamp.

[0009] Another advantage of the present invention is to provide a fog lamp and an optical system thereof and a vehicle with the fog lamp, wherein the light source is an LED module, which is beneficial to the assembly of the fog lamp and to prolonging the service life of the fog lamp.

[0010] Another advantage of the present invention is to provide a fog lamp and its optical system and a vehicle with the fog lamp, wherein the optical lens has a light incident portion and a light exit portion, wherein the light emitted by the light source is refracted through both sides of the light incident portion and the light exit portion of the optical lens, and the light in the horizontal direction is freely diffused after passing through the optical lens, which is beneficial to improving the optical performance of the fog lamp.

[0011] Another advantage of the present invention is to provide a fog lamp and an optical system thereof and a vehicle with the fog lamp, wherein the thickness of the optical lens is small, which is beneficial to reducing light loss.

[0012] Another advantage of the present invention is to provide a fog lamp and its optical system and a vehicle with a fog lamp, wherein the horizontal light generated by the light source is perpendicular to the light incident part, has a small light incident angle, low reflectivity, high light transmittance and low light loss rate.

[0013] Another advantage of the present invention is to provide a fog lamp and an optical system thereof and a vehicle with the fog lamp, wherein the optical lens freely diffuses light in the horizontal direction, which is beneficial to improving the uniformity of light in the horizontal direction.

[0014] Another advantage of the present invention is to provide a fog lamp and its optical system and a vehicle with the fog lamp, wherein the upper and lower ends of the optical lens are granulated so that the downward blue and yellow light overflow are remixed to form white light, which is beneficial to providing the optical performance of the fog lamp.

[0015] Another advantage of the present invention is to provide a fog lamp and its optical system and a vehicle with a fog lamp, wherein the light source is mounted on a metal housing via a metal circuit board, and the heat generated by the light source is transferred to the metal housing via the metal circuit board, which is beneficial to improving the heat dissipation performance of the fog lamp.

[0016] Another advantage of the present invention is to provide a fog lamp and its optical system and a vehicle with a fog lamp, wherein the light source is arranged at a focal position of the optical lens, which is beneficial for the light generated by the light source to vertically enter a light incident part of the optical lens, which is beneficial for the optical lens to collect the light generated by the light source and which is beneficial for the free diffusion of the light from the light source.

[0017] Another advantage of the present invention is to provide a fog lamp and its optical system and a vehicle with the fog lamp, wherein the light emitting portion of the optical lens is provided with an upper refractive section, a middle refractive section and a lower refractive section, wherein part of the light generated by the light source is refracted by the upper refractive section to form a uniform transition of 1 to 7 degrees downward; part of the light generated by the light source is refracted by the middle refractive section to form a downward tilt of 1 degree; part of the light generated by the light source is refracted by the lower refractive section to form a uniform transition of 1 to 6 degrees downward, so that the fog lamp converges the light in the vertical direction to avoid the light being too high.

[0018] Other advantages and features of the present invention will become more apparent from the following detailed description and may be realized by means of the instrumentalities and combinations particularly pointed out in the appended claims.

[0019] According to one aspect of the present invention, an optical system of the present invention that can achieve the above-mentioned objects and other objects and advantages includes:

[0020] a light source; and

[0021] An optical lens is arranged at the front end of the light source along the direction of the light projected by the light source, the optical lens includes a lens body and a light incident portion and a light exit portion formed on the lens body, a virtual central axis is defined by the optical lens, wherein the light incident portion of the optical lens has a cylindrical surface characteristic that is concave inward based on the central axis, and the light incident portion of the optical lens faces the light source, wherein the light emitted by the light source is collected by the light incident portion of the optical lens and refracted into the lens body, the light reaches the light exit portion of the optical lens through the lens body, and is refracted and diffused by the light exit portion to form a searchlight path, wherein the central angle of the light incident portion of the optical lens corresponding to the central axis is α, wherein 60°≤α≤90°, the light exit portion is further provided with an upper refractive section, a middle refractive section and a lower refractive section, the upper refractive section of the optical lens is integrally formed from the middle refractive section Extending upward, the lower refractive section of the optical lens extends downward from the middle refractive section as a whole, part of the light emitted by the light source is refracted and diffused by the upper refractive section to form an upper refractive light path that is tilted downward and has a uniform transition; part of the light emitted by the light source is refracted and diffused by the middle refractive section to form a middle refractive light path that is tilted downward; part of the light emitted by the light source is refracted and diffused by the lower refractive section to form a lower refractive light path that is tilted downward and has a uniform transition, wherein the upper refractive light path transitions from top to bottom to the middle refractive light path, and the lower refractive light path transitions from the middle refractive light path to bottom to form the searchlight light path, the middle refractive light path formed by the middle refractive section of the optical lens tilts downward by 1°; the upper refractive light path formed by the upper refractive section of the optical lens tilts downward by 1° to 7° and has a uniform transition; the lower refractive light path formed by the lower refractive section of the optical lens tilts downward by 1° to 6° and has a uniform transition.

[0022] According to an embodiment of the present invention, the light source is disposed inside the optical lens along the central axis of the optical lens.

[0023] According to an embodiment of the present invention, the position of the light source coincides with the position of the center point of the central axis of the optical lens.

[0024] According to one embodiment of the present invention, the light emitting portion of the optical lens has an annular outer surface characteristic that bulges outward based on the virtual central axis, and the central angle corresponding to the light emitting portion of the optical lens relative to the central axis is the same as the central angle corresponding to the light incident portion of the optical lens.

[0025] According to one embodiment of the present invention, the optical lens further includes an upper edge portion and a lower edge portion, and the upper edge portion and the lower edge portion are subjected to dermatoglyphic granulation treatment so that light passing through the upper edge portion of the optical lens and light passing through the lower edge portion of the optical lens are refracted and diffused by 0°-5°.

[0026] According to an embodiment of the present invention, the material of the optical lens is selected from the group consisting of PMMA transparent material, PC transparent material and high borosilicate transparent material.

[0027] According to another aspect of the present invention, the present invention further provides a fog lamp, comprising:

[0028] a lamp shell;

[0029] a circuit board, which is disposed on the lamp housing; and

[0030] an optical system electrically connected to the circuit board, the optical system comprising:

[0031] a light source; and

[0032] An optical lens is arranged at the front end of the light source along the direction of the light projected by the light source, the optical lens includes a lens body and a light incident portion and a light exit portion formed on the lens body, a virtual central axis is defined by the optical lens, wherein the light incident portion of the optical lens has a cylindrical surface characteristic that is concave inward based on the central axis, and the light incident portion of the optical lens faces the light source, wherein the light emitted by the light source is collected by the light incident portion of the optical lens and refracted into the lens body, the light reaches the light exit portion of the optical lens through the lens body, and is refracted and diffused by the light exit portion to form a searchlight path, wherein the central angle of the light incident portion of the optical lens corresponding to the central axis is α, wherein 60°≤α≤90°, the light exit portion is further provided with an upper refractive section, a middle refractive section and a lower refractive section, the upper refractive section of the optical lens is integrally formed from the middle refractive section Extending upward, the lower refractive section of the optical lens extends downward from the middle refractive section as a whole, part of the light emitted by the light source is refracted and diffused by the upper refractive section to form an upper refractive light path that is tilted downward and has a uniform transition; part of the light emitted by the light source is refracted and diffused by the middle refractive section to form a middle refractive light path that is tilted downward; part of the light emitted by the light source is refracted and diffused by the lower refractive section to form a lower refractive light path that is tilted downward and has a uniform transition, wherein the upper refractive light path transitions from top to bottom to the middle refractive light path, and the lower refractive light path transitions from the middle refractive light path to bottom to form the searchlight light path, the middle refractive light path formed by the middle refractive section of the optical lens tilts downward by 1°; the upper refractive light path formed by the upper refractive section of the optical lens tilts downward by 1° to 7° and has a uniform transition; the lower refractive light path formed by the lower refractive section of the optical lens tilts downward by 1° to 6° and has a uniform transition.

[0033] According to an embodiment of the present invention, the light source is disposed inside the optical lens along the central axis of the optical lens.

[0034] According to an embodiment of the present invention, the position of the light source coincides with the position of the center point of the central axis of the optical lens.

[0035] According to one embodiment of the present invention, the light emitting portion of the optical lens has an annular outer surface characteristic that bulges outward based on the virtual central axis, and the central angle corresponding to the light emitting portion of the optical lens relative to the central axis is the same as the central angle corresponding to the light incident portion of the optical lens.

[0036] According to one embodiment of the present invention, the optical lens further includes an upper edge portion and a lower edge portion, and the upper edge portion and the lower edge portion are subjected to dermatoglyphic granulation treatment so that light passing through the upper edge portion of the optical lens and light passing through the lower edge portion of the optical lens are refracted and diffused by 0°-5°.

[0037] According to an embodiment of the present invention, the material of the optical lens is selected from the group consisting of PMMA transparent material, PC transparent material and high borosilicate transparent material.

[0038] According to one embodiment of the present invention, the lamp housing comprises a shell body and a heat dissipation device arranged on the shell body, wherein the heat dissipation device is arranged on the shell body, the shell body has a lamp body installation space, and the optical system and the circuit board are fixed to the lamp body installation space by the shell body.

[0039] According to an embodiment of the present invention, the optical lens further comprises an upper edge portion and a lower edge portion, and the upper edge portion and the lower edge portion are subjected to a dermatoglyphic granulation process, so that light passing through the upper edge portion of the optical lens and light passing through the lower edge portion of the optical lens are refracted and diffused by 0. -5.

[0040] According to one embodiment of the present invention, it further includes a fixed bracket, wherein the fixed bracket is arranged between the light source and the optical lens of the optical system, and the optical lens is fixed by the fixed bracket, and the position of the light source is kept coincident with a focal position of the optical lens.

[0041] According to one embodiment of the present invention, it further includes a decorative cover, wherein the decorative cover is arranged at the upper end of the optical lens, and the optical lens is fixed to the fixed bracket by the decorative cover, the decorative cover covers the outer edge of the peripheral surface of the optical lens, and the optical system is sealed by the decorative cover to protect the light source and the optical lens of the optical system.

[0042] According to one embodiment of the present invention, it further includes a front position lamp assembly and an outer lens, wherein the front position lamp assembly is arranged in the lamp body installation space of the shell main body of the lamp housing, and the front position lamp assembly is located at the front end of the light source of the optical system, wherein the outer lens is arranged in the lamp housing, and the outer lens is sealedly installed at the end of the shell main body to seal the lamp body installation space of the lamp housing.

[0043] According to another aspect of the present invention, the present invention further provides a vehicle, comprising:

[0044] a vehicle host; and

[0045] At least one fog lamp, the at least one fog lamp is arranged on the vehicle main unit, wherein the fog lamp comprises:

[0046] a lamp shell;

[0047] a circuit board, which is disposed on the lamp housing; and

[0048] an optical system electrically connected to the circuit board, the optical system comprising:

[0049] a light source; and

[0050] An optical lens is arranged at the front end of the light source along the direction of the light projected by the light source, the optical lens includes a lens body and a light incident portion and a light exit portion formed on the lens body, a virtual central axis is defined by the optical lens, wherein the light incident portion of the optical lens has a cylindrical surface characteristic that is concave inward based on the central axis, and the light incident portion of the optical lens faces the light source, wherein the light emitted by the light source is collected by the light incident portion of the optical lens and refracted into the lens body, the light reaches the light exit portion of the optical lens through the lens body, and is refracted and diffused by the light exit portion to form a searchlight path, wherein the central angle of the light incident portion of the optical lens corresponding to the central axis is α, wherein 60°≤α≤90°, the light exit portion is further provided with an upper refractive section, a middle refractive section and a lower refractive section, the upper refractive section of the optical lens is integrally formed from the middle refractive section Extending upward, the lower refractive section of the optical lens extends downward from the middle refractive section as a whole, part of the light emitted by the light source is refracted and diffused by the upper refractive section to form an upper refractive light path that is tilted downward and has a uniform transition; part of the light emitted by the light source is refracted and diffused by the middle refractive section to form a middle refractive light path that is tilted downward; part of the light emitted by the light source is refracted and diffused by the lower refractive section to form a lower refractive light path that is tilted downward and has a uniform transition, wherein the upper refractive light path transitions from top to bottom to the middle refractive light path, and the lower refractive light path transitions from the middle refractive light path to bottom to form the searchlight light path, the middle refractive light path formed by the middle refractive section of the optical lens tilts downward by 1°; the upper refractive light path formed by the upper refractive section of the optical lens tilts downward by 1° to 7° and has a uniform transition; the lower refractive light path formed by the lower refractive section of the optical lens tilts downward by 1° to 6° and has a uniform transition.

[0051] Further objects and advantages of the present invention will be fully apparent from an understanding of the following description and the accompanying drawings.

[0052] These and other objects, features and advantages of the present invention will be more fully understood from the following detailed description, accompanying drawings and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 Test light distribution diagram for ECE R19 fog lamps.

[0054] Figure 2 The figure is an overall schematic diagram of a fog lamp in the prior art.

[0055] Figure 3 FIG. 1 is an overall schematic diagram of a fog lamp according to a first preferred embodiment of the present invention.

[0056] Figure 4 It is a schematic exploded view of the fog lamp according to the first preferred embodiment of the present invention.

[0057] Figure 5 It is a schematic diagram of an optical system of the fog lamp according to the first preferred embodiment of the present invention.

[0058] Fig. 6A It is a three-dimensional schematic diagram of the optical lens according to the first preferred embodiment of the present invention.

[0059] Figure 6B It is a schematic diagram of the optical lens according to the first preferred embodiment of the present invention.

[0060] Figure 6C It is a side view of the optical lens according to the first preferred embodiment of the present invention.

[0061] Figure 7 It is a cross-sectional view of the optical lens according to the first preferred embodiment of the present invention.

[0062] Fig. 8A It is a schematic diagram of the middle section optical circuit of the optical system of the first preferred embodiment of the present invention.

[0063] Figure 8B Schematic diagram of the upper and lower optical circuits of the optical system of the first preferred embodiment of the present invention.

[0064] Fig. 9 It is a schematic diagram of the optical circuit of the optical system in the horizontal cross-section direction according to the first preferred embodiment of the present invention.

[0065] Fig.10 It is an optical simulation diagram of the optical system of the first preferred embodiment of the present invention.

[0066] Fig.11 It is a perspective exploded schematic diagram of a lamp housing of the fog lamp according to the first preferred embodiment of the present invention, wherein a circuit board of the fog lamp is installed in the lamp housing.

[0067] Fig.12It is a schematic diagram of the optical system of the first preferred embodiment of the present invention, wherein the figure shows that the optical lens is fixed to a fixed bracket and a decorative cover.

[0068] Fig.13 It is a three-dimensional schematic diagram of a vehicle using the fog lamp of the first preferred embodiment of the present invention. DETAILED DESCRIPTION

[0069] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0070] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0071] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0072] Referring to the accompanying drawings of the present invention Figures 3 to 12 , a fog lamp according to the first preferred embodiment of the present invention is explained in the following description. The fog lamp can be installed at the front end of a vehicle, that is, the fog lamp can be used as the front fog lamp of the vehicle. The fog lamp includes a lamp housing 10, a circuit board 20 arranged on the lamp housing 10, and an optical system 30, wherein the optical system 30 is arranged on the circuit board 20. The optical system 30 includes at least one light source 31 and an optical lens 32, wherein the at least one light source 31 is electrically connected to the circuit board 20, and the optical lens 32 is arranged at the front end of the light source 31 along the direction in which the light source 31 projects light. The light generated by the light source 31 is refracted by the optical lens 32 to form a searchlight path 300, and the light irradiated by the searchlight path 300 forms a searchlight area.

[0073] It is worth mentioning that in this preferred embodiment of the present invention, the light generated by the light source 31 is collected and refracted by the optical lens 32 to form sufficient light intensity and width, thereby meeting the standard requirements of the front fog lamp. It can be understood by those skilled in the art that the application scenarios of the fog lamp are only used as examples and not as limitations. Therefore, the fog lamp can also be applied to other equipment and instruments as a lamp with searchlight function.

[0074] Preferably, in this preferred embodiment of the present invention, the light source 31 is implemented as an LED light source, wherein the light source 31 is disposed on the circuit board 20, and the light source 31 is electrically connected to the circuit board 20. More preferably, the light source 31 is implemented as a single light source LED module, that is, the light source 31 is a single LED light-emitting unit. Optionally, in other optional embodiments of the present invention, the light source 31 may also be implemented as a multi-light source LED module, that is, the light source 31 includes a plurality of LED light-emitting units. Preferably, the LED light-emitting units of the multi-light source LED module are arranged linearly.

[0075] It is worth mentioning that, in the preferred embodiment of the present invention, the LED module used by the light source 31 is white light, or yellow light, or golden light.

[0076] like FIG. 6A to FIG. 6C As shown, the optical lens 32 includes a lens body 321 and a light incident portion 322 and a light exit portion 323 formed on the lens body 321, wherein the light incident portion 322 of the optical lens 32 faces the light source 31, and the light projected by the light source 31 is refracted by the light incident portion 322 of the optical lens 32 and then enters the lens body 321. The light exit portion 323 of the optical lens 32 is facing away from the light source 31, wherein the light is refracted outwards by the light exit portion 323 through the lens body 321, and is projected to form the searchlight path 300.

[0077] The light incident portion 322 of the optical lens is an inner concave surface formed on the side of the lens body 321 facing the light source 31, and the light exit portion 323 is an outer convex surface formed on the side of the lens body 321 facing away from the light source 31, wherein the light emitted by the light source 31 is refracted through both sides of the light incident portion 322 and the light exit portion 323 of the optical lens 32 and then projected outward to form the searchlight path 300.

[0078] A virtual central axis L is defined by the optical lens 32, and the virtual central axis L is located on the side of the optical lens 32 facing the light source 31, wherein the light incident portion 322 of the optical lens 32 presents a cylindrical surface characteristic that is concave inward based on the virtual central axis L, and the light incident portion 322 is bent along a horizontal direction perpendicular to the virtual central axis L, and its bending direction is toward the light source 31. The light generated by the light source 31 is collected by the light incident portion 322 of the optical lens 32, and refracted into the lens body 321 of the optical lens 32. Preferably, in this preferred embodiment of the present invention, the optical lens 32 presents a bilaterally symmetrical structural characteristic.

[0079] Preferably, in this preferred embodiment of the present invention, the light source 31 is disposed inside the optical lens 32 along the central axis L of the optical lens 32. The light emitted by the light source 31 in the horizontal direction is perpendicular to the light incident portion 322 of the optical lens 32, and the light emitted by the light source 31 in the horizontal direction is perpendicularly incident to the light incident portion 322 of the optical lens 32. Therefore, it can be understood by those skilled in the art that the light incident angle of the light incident portion 322 of the optical lens 32 is small, which can reduce the reflectivity of light. Accordingly, the optical lens 32 has a high light transmittance and a reduced light loss rate.

[0080] More preferably, the position of the light source 31 coincides with the position of the center point of the center axis L of the optical lens 32. In other words, the light source 31 is disposed at the center point of the center axis L of the optical lens 32, wherein the light emitted by the light source 31 along the horizontal position of the center of the optical lens 32 is freely diffused after passing through the optical lens 32, so as to improve the uniformity of the searchlight illumination and the width of the searchlight field of view.

[0081] Preferably, in this preferred embodiment of the present invention, the central angle of the light incident portion 322 of the optical lens 32 corresponding to the central axis L is α, where 60° ≤α≤90°. It can be understood that the optical lens 32 is generally a fan-shaped structure, wherein in the horizontal direction, the light generated by the light source 31 is refracted by the optical lens 32 and diffuses outward in a radial shape, that is, the light in the horizontal direction is freely diffused, so as to improve the uniformity of the fog lamp in the horizontal direction. As an example, Fig.10 FIG. 3 is a schematic diagram showing a light spot of the searchlight path 300 projected by the fog lamp when the central angle α of the light incident portion 322 of the optical lens 32 relative to the central axis L is 84°.

[0082] The ECE R19 front fog lamp light intensity measurement standard requirements are shown in the following table. The light spot formed by the searchlight path projected by the fog lamp needs to radiate the light intensity standard requirements.

[0083] Table 1ECE R19 front fog lamp light intensity measurement standard requirements

[0084]

[0085] like FIG. 6A to FIG. 6C As shown, the light incident portion 322 of the lens body 32 of the optical system 30 can be concave toward the direction of the light source 31 to collect and refract enough light and light intensity to meet the light intensity requirements of the fog lamp. The light passing through the lens body 321 is refracted and diffused by the light emitting portion 323 of the optical lens 32 to obtain a searchlight range of sufficient width and improve the uniformity of the searchlight optical path 300 to meet the requirements of the fog lamp for the searchlight width and range. The light emitting portion 323 of the optical lens 32 is further provided with an upper refractive section 3231, a middle refractive section 3232 and a lower refractive section 3233. The upper refractive section 3231 of the optical lens 32 extends upward from the middle refractive section 3232 as a whole, and the lower refractive section 3233 of the optical lens 32 extends downward from the middle refractive section 3232 as a whole.

[0086] After part of the light emitted by the light source 31 is refracted by the light incident portion 322 of the optical lens 32, it reaches the upper refractive section 3231 of the optical lens 32 via the lens body 321, and then is refracted by the upper refractive section 3231 of the optical transparent 32, and forms an upper refractive light path 301. After part of the light emitted by the light source 31 is refracted by the light incident portion 322 of the optical lens 32, it reaches the middle refractive section 3232 of the optical lens 32 via the lens body 321, and then is refracted by the middle refractive section 3232 of the optical transparent 32, and forms a middle refractive light path 302. After part of the light emitted by the light source 31 is refracted by the light incident portion 322 of the optical lens 32, it reaches the lower refractive section 3233 of the optical lens 32 via the lens body 321, and then is refracted by the lower refractive section 3233 of the optical transparent 32, and forms a lower refractive light path 303. It can be understood that the upper refraction light path 301 , the middle refraction light path 302 , and the lower refraction light path 303 formed by refraction of the light emitting portion 323 of the optical lens 32 together constitute the searchlight light path 300 .

[0087] Fig. 8A and Figure 8BThe vertical cross section of the optical system and the optical paths formed by the optical system are shown, wherein in the preferred embodiment of the present invention, the upper refractive optical path 301 formed by the refraction of part of the light emitted by the light source 31 through the upper refractive section 3231 tilts downward and evenly transitions to the middle refractive optical path 302. The middle refractive optical path 302 formed by the refraction of part of the light emitted by the light source 31 through the middle refractive section 3232 tilts downward to the lower refractive optical path 303. The lower refractive optical path 303 formed by the refraction of part of the light emitted by the light source 31 through the lower refractive section 3233 tilts downward from the middle refractive optical path 302 and evenly transitions.

[0088] Preferably, part of the light emitted by the light source 31 passes through the middle refractive optical path 302 formed by the middle refractive section 3232 of the optical lens 32 and tilts downward by 1°; part of the light emitted by the light source 31 passes through the upper refractive optical path 301 formed by the upper refractive section 3231 of the optical lens 32 and tilts downward by 1° to 7° and transitions evenly; part of the light emitted by the light source 31 passes through the lower refractive optical path 303 formed by the lower refractive section 3233 of the optical lens 32 and tilts downward by 1° to 6° and transitions evenly. It can be understood by those skilled in the art that the refraction angles of the light by the refractive sections of the optical lens 32 are used as examples here, not as limitations, and therefore, in other optional embodiments of the present invention, the refractive sections of the optical lens can be set to other angles.

[0089] Fig. 9 The cross-sectional view of the optical system 30 along the horizontal direction and the optical path formed by the optical system 30 are shown. The light generated by the light source 31 is converged and refracted by the light incident portion 322 of the optical lens 32, and then reaches the light exit portion 323 of the optical lens 32 via the lens body 321, and then refracted and diffused by the light exit portion 323 to the two sides of the optical lens 32, that is, radiated to both sides, so as to expand the searchlight width or searchlight range of the fog lamp, and improve the uniformity of the light of the fog lamp in the horizontal direction. In particular, based on the horizontal plane direction where the light source 31 is located, the light generated by the light source 31 is vertically incident on the light incident portion 322 of the optical lens 32, and reaches the light exit portion 323 of the optical lens 32 via the lens body 321. In this horizontal direction, the light generated by the light source has a small incident angle, low reflectivity, and high light transmittance, so as to reduce light loss.

[0090] Those skilled in the art should understand that the light source 31 itself has a certain width and length, and therefore the light generated by the light source 31 is vertically incident on the light incident portion 322 of the optical lens 32 within an appropriate range.

[0091] It is worth mentioning that in this preferred embodiment of the present invention, the lateral length of the optical lens 32, that is, the length of the optical lens 32 in the horizontal direction, is greater than the height of the optical lens 32, that is, the length of the optical lens in the vertical direction, so that the optical lens diffuses the light emitted by the light source 31 in the horizontal direction to form the searchlight path 300 required for the fog lamp.

[0092] Preferably, the distance between the point of the light emitting portion 323 of the optical lens 32 in any horizontal direction and the center point O of the virtual center axis L is the same, so that in the horizontal direction, the angle of refraction and diffusion of the light emitted by the light source 31 through the optical lens 32 is the same, and the light of the optical system 30 in the horizontal direction is freely diffused, thereby improving the uniformity of the light distribution in the fog lamp search area. In other words, in this preferred embodiment of the present invention, the light emitting portion 323 of the optical lens 32 has an annular outer surface characteristic that bulges outward based on the virtual center axis L, and the center angle corresponding to the light emitting portion 323 of the optical lens 32 relative to the center axis L is the same as the center angle α corresponding to the light incident portion 322 of the optical lens 32.

[0093] As an example, in this preferred embodiment of the present invention, the lens focal point of the optical lens 32 is 30 mm. It will be understood by those skilled in the art that the lens focal length of the optical lens 32 and the thickness of the optical lens 32 are merely illustrative and not limiting. It will be understood that the light incident portion 322 has a cylindrical inner surface characteristic that is concave inward based on the virtual central axis L, and the light source 31 can be arranged close to the optical lens 32 to reduce the distance between the optical lens 32 and the light source 31, which is beneficial to the miniaturization of the structure of the optical system 30. It will be understood by those skilled in the art that the thickest thickness of the optical lens 32 is 12.3 mm, that is, the thickness of the middle part of the optical lens 32 is 12.3 mm, which is thinner than the thickness of the optical lens with a planar structure in the prior art, and is beneficial to reducing the loss of light.

[0094] like Figures 5 to 7As shown, the optical lens 32 further includes an upper edge portion 324 and a lower edge portion 325, wherein the upper edge portion 324 is located at the inner side of the upper end of the lens body 321, and the lower edge portion 325 is located at the inner side of the lower end of the lens body 321, that is, the upper edge portion 324 and the lower edge portion 325 are on the same side as the light incident portion 322. Preferably, the upper edge portion 324 extends integrally from the upper end of the lens body 321, and the lower edge portion 325 extends integrally from the lower end of the lens body 321. The upper edge portion 324 and the lower edge portion 325 of the optical lens 32 are treated with dermatoglyphics, so that the light of the upper edge portion 324 or the lower edge portion 325 of the optical lens 32 is refracted and diffused by 0°-5°, so that the blue and yellow overflow light downward are remixed to form white light. In other words, part of the light generated by the light source 31 is refracted by the upper edge portion 324 or the lower edge portion 325 of the optical lens 32 and then remixed to form white light, so as to avoid blue or yellow overflow.

[0095] Preferably, in this preferred embodiment of the present invention, the optical lens 32 is made of PMMA transparent material, or PC transparent material, or other transparent materials such as borosilicate. It is understood that in this preferred embodiment of the present invention, the material of the optical lens 32 is only used as an example and not as a limitation.

[0096] like Fig.11 As shown, the lamp housing 10 includes a housing body 11 and a heat dissipation device disposed on the housing body 11, wherein the heat dissipation device 12 is disposed at the lower end of the housing body 11, and the housing body 11 has a lamp body installation space 110, and the optical system 30 and the circuit board 20 are fixed to the lamp body installation space 110 by the housing body 11. Preferably, in this preferred embodiment of the present invention, the lamp housing 10 is made of metal, and the circuit board 20 is attached to the housing body 11 of the lamp housing 10, wherein the heat generated by the light source 31 is conducted to the housing body 11 of the lamp housing 10 through the circuit board 20, and then the heat dissipation device 12 of the lamp housing 10 cools down the housing body 11 to avoid heat accumulation.

[0097] Preferably, the light source 31 and the driving circuit of the optical system 30 are soldered on the circuit board by reflow soldering, wherein the circuit board is a metal circuit board, so as to conduct the heat generated by the light source 31 to the lamp housing 10 .

[0098] like Fig.12As shown, the fog lamp further includes a fixed bracket 40, wherein the fixed bracket 40 is arranged between the light source 31 and the optical lens 32 of the optical system 30, and the optical lens 32 is fixed by the fixed bracket 40, and the position of the light source 31 is kept coincident with the focal position of the optical lens 32.

[0099] In detail, the fixed bracket 40 includes a bracket mounting end 41 and a bracket fixing end 42 extending integrally from the bracket mounting end 41, wherein the optical lens 32 is fixedly mounted on the bracket mounting end 41 of the fixed bracket 42, and the bracket fixing end 42 of the fixed bracket 40 is fixedly mounted to the circuit board 20 to keep the positions of the optical lens 32 and the light source 31 stable. The fixed bracket 40 is further provided with a light-gathering space 400 and a lower end opening 420 and an upper end opening 410 connected to the light-gathering space 400, wherein the lower end opening 420 of the fixed bracket 40 faces the light source 31 of the optical system 30, and the upper end opening 410 of the fixed bracket 40 faces the optical lens 32 of the optical system, so that the fixed bracket 40 gathers the light generated by the light source 31 to the optical lens 32. Preferably, in this preferred embodiment of the present invention, the circuit board 20 is fixed to the lamp housing 10 by the fixed bracket 40. As an example, the positioning column of the fixing bracket 40 is positioned with at least one limiting hole of the circuit board 20, the fixing bracket 40, the circuit board 20 and the lamp housing 10 are connected with screws, and the optical lens 32 is aligned with the positioning hole of the fixing bracket 40 through the positioning column.

[0100] The optical lens 32 further includes two fixing units 326, wherein the two fixing units 326 are disposed on the lens body 321 and the fixing units 326 integrally extend from the lens body 321. The fixing units 326 of the optical lens 32 are fixed to the bracket mounting end 41 of the fixing bracket 40.

[0101] Preferably, in this preferred embodiment of the present invention, the fixed bracket 40 is a basin-shaped structure with a small lower end and a large upper end, wherein the mounting end 41 of the fixed bracket 40 is larger than the fixed end 42 of the fixed bracket 40, and the light emitted by the light source 31 is gathered to the light incident part 322 of the optical lens 32 through the focusing space 400 of the fixed bracket 40.

[0102] like Fig.12As shown, the fog lamp further includes a decorative cover 50, wherein the decorative cover 50 is disposed on the upper end of the optical lens 32, and the optical lens 32 is fixed to the fixing bracket 40 by the decorative cover 50. The decorative cover 50 covers the outer edge of the peripheral surface of the optical lens 32, and the optical system 30 is sealed by the decorative cover 50 to protect the light source of the optical system 30 and the optical lens 32.

[0103] The lens body 321 of the optical lens 32 is bent so that a light-transmitting hole 320 is formed at the upper end and the lower end of the optical lens 32, wherein the light-transmitting hole 320 is connected to the light-collecting space 400 of the fixing bracket 40. The decorative cover 50 further includes a sealing unit 51 and at least one connecting member 52 arranged on the sealing unit 51, wherein the sealing unit 51 covers the periphery of the optical lens 32 and blocks the light-transmitting hole 320 of the optical lens 32. The connecting member 52 extends downward from the sealing unit 51 as a whole, and the sealing unit 51 is sealed at the periphery of the lens body 321 by the connecting member 52. The shape of the sealing unit 51 is adapted to the shape of the lens body 321 of the optical lens 32, and it covers the periphery of the lens body 321. It is worth mentioning that in this preferred embodiment of the present invention, the connecting member 52 can be but is not limited to a snap-fit ​​element, wherein the connecting member 52 is fixed to the fixing bracket 40 by snap-fitting.

[0104] like Figure 4 As shown, the fog lamp further includes a front position lamp assembly 60, and the front position lamp assembly 60 is disposed in the lamp body installation space 110 of the housing body 11 of the lamp housing 10. The front position lamp assembly 60 is located at the front end of the light source 31 of the optical system 30, wherein the light emitted by the front position lamp assembly 60 makes the light emitted by the optical system 30 diffuse and uniform. In this preferred embodiment of the present invention, the front position lamp assembly 60 is disposed in the decorative cover 50.

[0105] Accordingly, the decorative cover 50 further includes a fixing ring 53, wherein the fixing ring 53 is located at the outer periphery of the sealing unit 51, and the front position lamp assembly 60 is fixed to the fixing ring 53 of the decorative cover 50. Optionally, the front position lamp assembly 60 is fixed between the shell body 11 and the decorative cover 50.

[0106] The front position light assembly 60 includes a front position light source plate 61 and a front position light lens 62, wherein the front position light source plate 61 is fixed to the fixing ring 53 of the decorative cover 50 by the front position light lens 62. It is worth mentioning that the front position light source plate 61 includes a plurality of light source units, wherein the light source units surround the periphery of the optical system 30. The front position light lens 60 is fixed to the fixing ring 53 of the decorative cover 50 by means of a snap-fit ​​connection.

[0107] like Figure 4 As shown, the fog lamp further includes at least one outer lens 70, which is disposed on the lamp housing 10 and is sealedly mounted on the end of the housing body 11 to seal the lamp body installation space 110 of the lamp housing 10. The outer lens 70 is fixed to the lamp housing 10 by using sealing silicone to isolate the inside of the lamp from the outside, preventing external water vapor and flying dust from flowing into the inside of the lamp, causing the lamp to generate fog, and corroding electronic components.

[0108] Preferably, in this preferred embodiment of the present invention, the outer lens 70 is made of PC transparent material.

[0109] It is worth mentioning that in this preferred embodiment of the present invention, the optical lens 32 of the optical system 30 can also be applied to a vehicle low beam lamp, that is, the optical lens 32 is used as a lens unit of a vehicle low beam lamp to expand the illumination range of the low beam lamp. When the optical system 32 is applied to the low beam lamp of the vehicle, the optical system 32 projects the widened light pattern required by the low beam lamp.

[0110] like Fig.13 As shown, according to another aspect of the present invention, the present invention further provides a vehicle, the vehicle comprising a vehicle host 100 and at least one fog lamp 200 arranged on the vehicle host 100, wherein the fog lamp 200 is arranged at the front end of the vehicle host 100, that is, the fog lamp 200 serves as the front fog lamp of the vehicle. It is worth mentioning that the structure and function of the fog lamp 200 are the same as those of the fog lamp in the first preferred embodiment mentioned above. It is more worth mentioning that the vehicle host 100 is not limited to automobiles, electric vehicles or motorcycles in this part. It can be understood by those skilled in the art that the fog lamp 200 can also be used as a lighting device for other equipment, such as a fixed fog lamp lighting device.

[0111] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. An optical system, characterized in that: include: a light source; and An optical lens is arranged at the front end of the light source along the direction of the light projected by the light source, the optical lens includes a lens body and a light incident portion and a light exit portion formed on the lens body, a virtual central axis is defined by the optical lens, wherein the light incident portion of the optical lens has a cylindrical surface characteristic that is concave inward based on the central axis, and the light incident portion of the optical lens faces the light source, wherein the light emitted by the light source is collected by the light incident portion of the optical lens and refracted into the lens body, the light reaches the light exit portion of the optical lens through the lens body, and is refracted and diffused by the light exit portion to form a searchlight path, wherein the central angle of the light incident portion of the optical lens corresponding to the central axis is α, wherein 60°≤α≤90°, the light exit portion is further provided with an upper refractive section, a middle refractive section and a lower refractive section, the upper refractive section of the optical lens is integrally formed from the middle refractive section Extending upward, the lower refractive section of the optical lens extends downward from the middle refractive section as a whole, part of the light emitted by the light source is refracted and diffused by the upper refractive section to form an upper refractive light path that is tilted downward and has a uniform transition; part of the light emitted by the light source is refracted and diffused by the middle refractive section to form a middle refractive light path that is tilted downward; part of the light emitted by the light source is refracted and diffused by the lower refractive section to form a lower refractive light path that is tilted downward and has a uniform transition, wherein the upper refractive light path transitions from top to bottom to the middle refractive light path, and the lower refractive light path transitions from the middle refractive light path to bottom to form the searchlight light path, the middle refractive light path formed by the middle refractive section of the optical lens tilts downward by 1°; the upper refractive light path formed by the upper refractive section of the optical lens tilts downward by 1° to 7° and has a uniform transition; the lower refractive light path formed by the lower refractive section of the optical lens tilts downward by 1° to 6° and has a uniform transition. 2 . The optical system according to claim 1 , wherein the light source is disposed inside the optical lens along the central axis of the optical lens. 3 . The optical system according to claim 2 , wherein the position of the light source coincides with the position of the center point of the central axis of the optical lens.

4. An optical system according to any one of claims 1 to 3, wherein the light emitting portion of the optical lens has an annular outer surface characteristic that bulges outward based on the virtual central axis, and the central angle corresponding to the light emitting portion of the optical lens relative to the central axis is the same as the central angle corresponding to the light incident portion of the optical lens.

5. An optical system according to any one of claims 1 to 3, wherein the optical lens further comprises an upper edge portion and a lower edge portion, and the upper edge portion and the lower edge portion are subjected to dermatoglyphic granulation treatment so that light passing through the upper edge portion of the optical lens and light passing through the lower edge portion of the optical lens are refracted and diffused by 0°-5°. 6 . The optical system according to claim 1 , wherein the material of the optical lens is selected from the group consisting of PMMA transparent material, PC transparent material and borosilicate transparent material.

7. A fog lamp, characterized in that: include: a lamp shell; a circuit board, which is arranged on the lamp housing; as well as an optical system electrically connected to the circuit board, the optical system comprising: a light source; and An optical lens is arranged at the front end of the light source along the direction of the light projected by the light source, the optical lens includes a lens body and a light incident portion and a light exit portion formed on the lens body, a virtual central axis is defined by the optical lens, wherein the light incident portion of the optical lens has a cylindrical surface characteristic that is concave inward based on the central axis, and the light incident portion of the optical lens faces the light source, wherein the light emitted by the light source is collected by the light incident portion of the optical lens and refracted into the lens body, the light reaches the light exit portion of the optical lens through the lens body, and is refracted and diffused by the light exit portion to form a searchlight path, wherein the central angle of the light incident portion of the optical lens corresponding to the central axis is α, wherein 60°≤α≤90°, the light exit portion is further provided with an upper refractive section, a middle refractive section and a lower refractive section, the upper refractive section of the optical lens is integrally formed from the middle refractive section Extending upward, the lower refractive section of the optical lens extends downward from the middle refractive section as a whole, part of the light emitted by the light source is refracted and diffused by the upper refractive section to form an upper refractive light path that is tilted downward and has a uniform transition; part of the light emitted by the light source is refracted and diffused by the middle refractive section to form a middle refractive light path that is tilted downward; part of the light emitted by the light source is refracted and diffused by the lower refractive section to form a lower refractive light path that is tilted downward and has a uniform transition, wherein the upper refractive light path transitions from top to bottom to the middle refractive light path, and the lower refractive light path transitions from the middle refractive light path to bottom to form the searchlight light path, the middle refractive light path formed by the middle refractive section of the optical lens tilts downward by 1°; the upper refractive light path formed by the upper refractive section of the optical lens tilts downward by 1° to 7° and has a uniform transition; the lower refractive light path formed by the lower refractive section of the optical lens tilts downward by 1° to 6° and has a uniform transition. 8 . The fog lamp according to claim 7 , wherein the light source is disposed inside the optical lens along the central axis of the optical lens. 9 . The fog lamp according to claim 8 , wherein a position of the light source coincides with a position of a center point of the central axis of the optical lens.

10. The fog lamp according to any one of claims 7 to 9, wherein the light emitting portion of the optical lens presents an annular outer surface characteristic protruding outward based on the virtual central axis, and the central angle corresponding to the light emitting portion of the optical lens relative to the central axis is the same as the central angle corresponding to the light incident portion of the optical lens.

11. The fog lamp according to any one of claims 7 to 9, wherein the optical lens further comprises an upper edge portion and a lower edge portion, and the upper edge portion and the lower edge portion are subjected to dermatoglyphic granulation treatment so that the light passing through the upper edge portion of the optical lens and the light passing through the lower edge portion of the optical lens are refracted and diffused by 0°-5°.

12. The fog lamp according to any one of claims 7 to 9, wherein the optical lens is made of a material selected from the group consisting of PMMA transparent material, PC transparent material and high borosilicate transparent material.

13. The fog lamp according to any one of claims 7 to 9, wherein the lamp housing comprises a shell body and a heat dissipation device arranged on the shell body, wherein the heat dissipation device is arranged on the shell body, the shell body has a lamp body installation space, and the optical system and the circuit board are fixed to the lamp body installation space by the shell body.

14. The fog lamp according to claim 13 further comprises a fixing bracket, wherein the fixing bracket is arranged between the light source and the optical lens of the optical system, and the optical lens is fixed by the fixing bracket to keep the position of the light source coincident with a focal position of the optical lens.

15. The fog lamp according to claim 14 further comprises a decorative cover, wherein the decorative cover is arranged at the upper end of the optical lens, and the optical lens is fixed to the fixed bracket by the decorative cover, the decorative cover covers the outer edge of the peripheral surface of the optical lens, and the optical system is sealed by the decorative cover to protect the light source and the optical lens of the optical system.

16. The fog lamp according to claim 14 further comprises a front position lamp assembly and an outer lens, wherein the front position lamp assembly is arranged in the lamp body mounting space of the shell main body of the lamp housing, and the front position lamp assembly is located at the front end of the light source of the optical system, wherein the outer lens is arranged in the lamp housing, and the outer lens is sealingly mounted on the end of the shell main body to seal the lamp body mounting space of the lamp housing.

17. A vehicle, characterized in that: include: A vehicle host; and At least one fog lamp, the at least one fog lamp is arranged on the vehicle main unit, wherein the fog lamp comprises: a lamp shell; a circuit board, which is disposed on the lamp housing; and an optical system electrically connected to the circuit board, the optical system comprising: a light source; and An optical lens is arranged at the front end of the light source along the direction of the light projected by the light source, the optical lens includes a lens body and a light incident portion and a light exit portion formed on the lens body, a virtual central axis is defined by the optical lens, wherein the light incident portion of the optical lens has a cylindrical surface characteristic that is concave inward based on the central axis, and the light incident portion of the optical lens faces the light source, wherein the light emitted by the light source is collected by the light incident portion of the optical lens and refracted into the lens body, the light reaches the light exit portion of the optical lens through the lens body, and is refracted and diffused by the light exit portion to form a searchlight path, wherein the central angle of the light incident portion of the optical lens corresponding to the central axis is α, wherein 60°≤α≤90°, the light exit portion is further provided with an upper refractive section, a middle refractive section and a lower refractive section, the upper refractive section of the optical lens is integrally formed from the middle refractive section Extending upward, the lower refractive section of the optical lens extends downward from the middle refractive section as a whole, part of the light emitted by the light source is refracted and diffused by the upper refractive section to form an upper refractive light path that is tilted downward and has a uniform transition; part of the light emitted by the light source is refracted and diffused by the middle refractive section to form a middle refractive light path that is tilted downward; part of the light emitted by the light source is refracted and diffused by the lower refractive section to form a lower refractive light path that is tilted downward and has a uniform transition, wherein the upper refractive light path transitions from top to bottom to the middle refractive light path, and the lower refractive light path transitions from the middle refractive light path to bottom to form the searchlight light path, the middle refractive light path formed by the middle refractive section of the optical lens tilts downward by 1°; the upper refractive light path formed by the upper refractive section of the optical lens tilts downward by 1° to 7° and has a uniform transition; the lower refractive light path formed by the lower refractive section of the optical lens tilts downward by 1° to 6° and has a uniform transition.

Images