A small-size large-viewing-angle welcome lamp lens

Abstract

The utility model relates to the field of automobile, disclose a small size big field of vision welcome lamp lens, including frame, including light source, the light source rear end fixedly connected with welcome lamp main part, welcome lamp main part left side fixedly connected with fixed block, the light source front end is provided with spotlight lens, spotlight lens front end is provided with the film pattern carrier, the film pattern carrier front end is provided with imaging system, the imaging system includes glass double cemented lens, spotlight lens and imaging system constitute glass plastic hybrid lens group, the welcome lamp lens whole length along the optical axis direction is less than or equal to 35mm, width is less than or equal to 25mm, height is less than or equal to 20mm, and its projection field of view angle is greater than or equal to 80 DEG. In the utility model, through glass plastic hybrid lens group, glass double cemented lens design, spotlight lens realizes lightweight spotlight with (PC), double cemented glass offsets big field of vision aberration, adapts to the narrow installation space of car, solves the problem of traditional full plastic chromatic aberration big, full glass volume big.

Description

Technical Field

[0001] This utility model relates to the automotive field, and in particular to a small-sized welcome light lens with a large field of view. Background Technology

[0002] A small-sized, wide-field-of-view welcome light lens is the core optical component of an automotive welcome light carpet system. It is mainly installed below the car door or at the door sill, and works with the light source control system to achieve different welcome light carpet functions.

[0003] A small-sized welcome light lens with a large field of view includes a lens structure, an anti-reflective coating, and a mounting adapter structure, and partially includes an optical path calibration reference, which work together to achieve a large field of view projection function in a small size.

[0004] Existing traditional equipment is mostly made of all-plastic or all-glass materials. All-plastic lenses are low in cost and light in weight, and are mainly responsible for the initial refraction of light to form an image, but they have poor optical stability and are easily deformed by temperature. All-glass lenses have good optical stability and high image clarity, but they are difficult to manufacture, heavy, and difficult to reduce in size. Single condenser lens: It is an aspherical plastic lens, which is placed between the light source and the film pattern carrier. Its function is to converge the diverging light emitted by the light source and prevent the light from being scattered, resulting in insufficient projection brightness. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a small-sized welcome light lens with a large field of view, which aims to improve the problems of poor optical stability, difficult processing, and heavy weight in traditional equipment in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A small-sized welcome light lens with a large field of view includes a light source, a welcome light body fixedly connected to the rear end of the light source, a fixing block fixedly connected to the left side of the welcome light body, a focusing lens disposed at the front end of the light source, a film pattern carrier disposed at the front end of the focusing lens, and an imaging system disposed at the front end of the film pattern carrier. The imaging system includes a glass doublet lens, and the condenser lens and the imaging system constitute a glass-plastic hybrid lens group. The overall length of the welcome light lens along the optical axis is ≤35mm, the width is ≤25mm, the height is ≤20mm, and its projection field of view is ≥80°.

[0007] As a further description of the above technical solution: The focusing lens includes two plastic lenses made of PMMA, and the outer surface of the plastic lenses is provided with a scratch-resistant and wear-resistant coating.

[0008] As a further description of the above technical solution: The glass doublet lens includes a first glass lens, and a second glass lens is disposed at the front end of the first glass lens.

[0009] As a further description of the above technical solution: The surfaces of the condenser lens and the glass doublet lens are coated with a magnesium fluoride antireflective film.

[0010] As a further description of the above technical solution: The imaging system also includes an imaging lens No. 11, which is disposed at the front end of the glass doublet lens and is an aspherical plastic lens.

[0011] As a further description of the above technical solution: The film pattern carrier is a transparent PET substrate, and an ink pattern layer is provided on one side of the substrate.

[0012] As a further description of the above technical solution: The light source is a surface-mount LED light source.

[0013] As a further description of the above technical solution: The first glass lens and the second glass lens are bonded together with optical resin adhesive. The first glass lens is crown optical glass, and the second glass lens is flint optical glass.

[0014] This utility model has the following beneficial effects: In this invention, a hybrid glass-plastic lens group and a double-cemented glass lens design are used. The focusing lens system is made of PC material, which takes into account both lightweight and initial light-gathering requirements. The double-cemented glass lens of the imaging system utilizes the properties of crown glass and flint glass to cancel chromatic aberration under a large field of view, solving the problem of large chromatic aberration in traditional all-plastic lenses. At the same time, compared with traditional all-glass lens groups, the overall volume of the hybrid glass-plastic structure is reduced, making it suitable for the narrow installation space of automobiles and solving the problem of large volume of traditional all-glass lens groups.

[0015] 2. In this utility model, the lens surface is coated with a magnesium fluoride antireflection film, which reduces reflection loss in the visible light band compared to traditional uncoated lenses; combined with the imaging system, the ratio of focal length to effective aperture is optimized, further improving the light converging efficiency and solving the problems of low light utilization and insufficient brightness of traditional lenses. Attached Figure Description

[0016] Figure 1 This is a main body diagram of a small-sized, large-field-of-view welcome light lens proposed in this utility model; Figure 2 This is a cross-sectional structural diagram of a small-sized, large-field-of-view welcome light lens proposed in this utility model.

[0017] Legend: 1. Light source; 2. Condensing lens; 3. Film pattern carrier; 4. Plastic lens; 5. First glass lens; 6. Second glass lens; 7. Imaging lens No. 11; 8. Welcome light body; 9. Fixing block. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Reference Figure 1 and Figure 2 The present invention provides an embodiment of a small-sized, large-field-of-view welcome light lens, comprising a light source 1. The light source 1 is characterized by: a welcome light body 8 fixedly connected to its rear end; a fixing block 9 fixedly connected to the left side of the welcome light body 8; the welcome light body 8 providing a mounting carrier and positioning for components, ensuring that each optical component is arranged sequentially along the optical axis, and guaranteeing a stable light propagation path; a condensing lens 2 is provided at the front end of the light source 1; a film pattern carrier 3 is provided at the front end of the condensing lens 2; and an imaging system is provided at the front end of the film pattern carrier 3. The imaging system includes a glass doublet lens. The condenser lens 2 and the imaging system form a glass-plastic hybrid lens group. The overall length of the welcome light lens along the optical axis is ≤35mm, the width is ≤25mm, and the height is ≤20mm, and its projection field of view is ≥80°. The condenser lens 2 includes two plastic lenses 4. The plastic lenses 4 are made of PMMA and have a scratch-resistant and wear-resistant coating on their outer surface. The glass doublet lens includes a first glass lens 5, and a second glass lens 6 is provided at the front end of the first glass lens 5.

[0020] Reference Figure 2The focusing lens 2 and the glass doublet lens are both coated with magnesium fluoride antireflective film. The imaging system also includes an imaging lens 7, which is located at the front end of the glass doublet lens. The imaging lens 7 is an aspherical plastic lens. The imaging lens 7 is located at the front end of the glass doublet lens and is an aspherical plastic lens. Finally, a clear and bright large-size welcome light carpet pattern is accurately projected onto the ground to achieve a wide field of view and high-definition imaging effect. The film pattern carrier 3 is a transparent PET or glass substrate with an ink pattern layer on one side. The light source 1 is a patch LED light source. The light source 1 is the light source of the welcome light lens and provides the initial light energy for subsequent light propagation and pattern projection. It is the basic light-emitting component to achieve the welcome light carpet effect. The first glass lens 5 and the second glass lens 6 are bonded together with optical resin adhesive. The first glass lens 5 is crown optical glass and the second glass lens 6 is flint optical glass.

[0021] Working Principle: First, light source 1, as a surface-mount LED light source, emits light. This divergent light is projected onto the focusing lens 2. Due to the spherical curvature of the two plastic lenses 4 within the focusing lens 2, the divergent light is converged into collimated light. Simultaneously, the scratch-resistant and wear-resistant coating on the outer surface of the plastic lenses 4 prevents wear and tear, ensuring stable light transmission. Subsequently, the collimated light is perpendicularly projected onto the film pattern carrier 3. The film pattern carrier 3 uses transparent PET as its substrate and has an ink pattern layer on one side. When light passes through this ink layer, it carries the corresponding welcome light carpet pattern information based on the differences in the ink layer's light transmittance, forming patterned light and completing the process of combining light and pattern.

[0022] After the patterned light carrying the pattern information enters the imaging system, it first passes through a glass doublet lens composed of a first glass lens 5 and a second glass lens 6. The first glass lens 5 is crown glass, and the second glass lens 6 is flint glass. The two are bonded together with optical resin adhesive. The low dispersion of crown glass and the high dispersion of flint glass work together to cancel out dispersion phenomena at a large field of view, ensuring that the light paths of different wavelengths in the patterned light are consistent and correcting chromatic aberration to improve the sharpness of the pattern edges. After that, the chromatic aberration-corrected "patterned light" continues to propagate to imaging lens 7, number 11. Imaging lens 7, as an aspherical plastic lens, further corrects light aberrations through a specific aspherical coefficient, so that the light is projected uniformly at a field of view of ≥80°. In addition, the magnesium fluoride anti-reflection coating on the surface of the condenser lens 2 and the glass doublet lens improves the visible light transmittance and reduces reflection loss. Combined with the imaging system's F-number of 1.6-2.4 to optimize light distribution, a clear and high-brightness large-size welcome light carpet pattern is finally accurately projected onto the ground. The main body 8 of the welcome light provides a mounting carrier for each optical component, while the fixing block 9 ensures that the entire lens is stably installed on the car door or sill, allowing the lens to stably achieve a large field of view projection effect with a small size structure of ≤35mm (optical axis length), ≤25mm (width), and ≤20mm (height).

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A small-sized, large-field-of-view welcome light lens, comprising a light source (1), characterized in that: The light source (1) is fixedly connected to the rear end of the welcoming light body (8), and a fixing block (9) is fixedly connected to the left side of the welcoming light body (8). A condensing lens (2) is provided at the front end of the light source (1), a film pattern carrier (3) is provided at the front end of the condensing lens (2), and an imaging system is provided at the front end of the film pattern carrier (3). The imaging system includes a glass double cemented lens. The condenser lens (2) and the imaging system constitute a glass-plastic hybrid lens group. The overall length of the welcome light lens along the optical axis is ≤35mm, the width is ≤25mm, the height is ≤20mm, and its projection field of view is ≥80°.

2. The small-sized, large-field-of-view welcome light lens according to claim 1, characterized in that: The focusing lens (2) includes two plastic lenses (4), the plastic lenses (4) are made of PMMA, and the outer surface of the plastic lenses (4) is provided with a scratch-resistant and wear-resistant coating.

3. The small-sized, large-field-of-view welcome light lens according to claim 1, characterized in that: The glass doublet lens includes a first glass lens (5), and a second glass lens (6) is provided at the front end of the first glass lens (5).

4. A small-sized, large-field-of-view welcome light lens according to claim 2, characterized in that: The surfaces of the condenser lens (2) and the glass doublet lens are both coated with a magnesium fluoride antireflective film.

5. A small-sized, large-field-of-view welcome light lens according to claim 1, characterized in that: The imaging system also includes an imaging lens (7) No. 11, which is located at the front end of the glass doublet lens and is an aspherical plastic lens.

6. A small-sized, large-field-of-view welcome light lens according to claim 1, characterized in that: The film pattern carrier (3) is a transparent PET substrate, and an ink pattern layer is provided on one side of the substrate.

7. A small-sized, large-field-of-view welcome light lens according to claim 1, characterized in that: The light source (1) is a surface-mount LED light source.

8. A small-sized, large-field-of-view welcome light lens according to claim 3, characterized in that: The first glass lens (5) and the second glass lens (6) are bonded together with optical resin adhesive. The first glass lens (5) is crown optical glass and the second glass lens (6) is flint optical glass.

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