Lens module and projection device
By adjusting the size ratio of the first lens to the last lens in the projection lens module and introducing multiple lenses and apertures, the problem of excessive lens size is solved, a large luminous angle and easy installation effect is achieved, and the The imaging quality and light projection intensity of the projection device.
Patent Information
- Application Number
- CN202420616150.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-28
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-03-28
AI Technical Summary
In the existing projection lens, the lens size of the first lens or the last lens is limited by spatial placement and efficiency, resulting in the lens size being too large, difficult to manufacture and install, and cannot take into account the better luminous angle and installation convenience.
Design a lens module to ensure that the size of the first lens is less than 80% of the last lens by adjusting the size of the first lens and the last lens, and introduce multiple lenses into the lens module to optimize the light path, including the aperture and the full Glass lenses ensure uniform light projection and reduce light loss.
The high light emitting angle is achieved with both easy installation effect, while improving the imaging quality and light projection intensity of the projection device.
Smart Images
Figure CN222259694U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a lens module and a projection device, in particular to a lens module and a projection device used for projection. Background Art
[0002] In existing projection lenses, for space placement or efficiency considerations, the size of the first lens or the last lens in the projection module is limited. Because the first lens needs to have a short projection distance or a large projection size in order to meet the best light-emitting angle, the lens size of the first lens is too large, which is not conducive to manufacturing or installation.
[0003] Therefore, it is necessary to design a new lens module and projection device to overcome the above defects. Utility Model Content
[0004] The utility model aims to provide a lens module and a projection device, which can achieve the effects of having a larger light-emitting angle and being easy to install by adjusting the sizes of a first lens and a last lens.
[0005] To achieve the above-mentioned purpose, the utility model provides a lens module, the panel end emits light through the lens module to the projection end, the lens module comprises: a first lens, close to the projection end, the light passes through the first lens to the projection end; an aperture, close to the first lens; and a last lens, close to the panel end, the panel end emits the light through the last lens; wherein the first lens has a first size, the last lens has a second size, and the ratio of the first size to the second size is less than 0.8.
[0006] Preferably, the first lens has a first focal length, the last lens has a second focal length, and the first focal length is smaller than the second focal length.
[0007] Preferably, the aperture is located between the first lens and the projection end, and the distance between the aperture and the first lens is smaller than the distance between the aperture and the projection end.
[0008] Preferably, a second lens is further included, the second lens is located between the first lens and the last lens, the aperture is located between the first lens and the second lens, and the distance between the aperture and the first lens is smaller than the distance between the aperture and the second lens.
[0009] Preferably, the second lens has a third lens and a fourth lens. In the direction of the light, the third lens and the fourth lens are located on both sides of the second lens. At least one of the third lens and the fourth lens is a concave lens.
[0010] Preferably, a third lens is further included, wherein the third lens is located between the second lens and the last lens, and the third lens is an all-glass lens.
[0011] Preferably, a fourth lens is further included, wherein the fourth lens is located between the third lens and the last lens, and the fourth lens is an all-glass lens.
[0012] Preferably, the first lens has a first lens and a second lens. In the direction of the light, the first lens and the second lens are located on both sides of the first lens. The first lens and the second lens are convex lenses.
[0013] Preferably, it further comprises a second lens, wherein the second lens is located between the first lens and the last lens, and the first lens, the second lens and the last lens are all made of full glass lenses.
[0014] The utility model also provides a projection device, comprising: a panel end, emitting light; the lens module as described above, through which the light passes, the lens module being used for a vehicle lens; and a projection end, projecting the light passing through the lens module.
[0015] Compared with the prior art, the embodiments of the utility model provide a lens module and a projection device, in which light is emitted from the panel end through the lens module to the projection end, and the lens module includes a first lens, an aperture and a last lens, the first lens is close to the projection end, and the light is emitted through the first lens to the projection end; the aperture is close to the first lens; the last lens is close to the panel end, and the light is emitted from the panel end through the last lens; wherein the first lens has a first size, the last lens has a second size, and the ratio of the first size to the second size is less than 0.8, so that the effect of having a larger light-emitting angle and easy installation can be achieved by adjusting the sizes of the first lens and the last lens. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 A schematic diagram of a lens module according to an embodiment of the present invention;
[0017] Figure 2 This is a horizontal light fan diagram of light passing through a lens module according to an embodiment of the utility model;
[0018] Figure 3 A field curvature diagram and a distortion diagram of light passing through a lens module according to an embodiment of the utility model;
[0019] Figure 4 A light spot diagram of a light beam passing through a lens module according to an embodiment of the utility model;
[0020] Figure 5 This is a diagram of the MTF (Modulation Transfer Function) of light passing through a lens module according to an embodiment of the present invention. DETAILED DESCRIPTION
[0021] In order to provide a further understanding of the purpose, structure, features and functions of the present invention, the present invention is described in detail below with reference to the embodiments.
[0022] Reference Figure 1 As shown, Figure 1 The schematic diagram of the lens module of one embodiment of the utility model. The utility model provides a lens module 100, the panel end 101 emits light through the lens module 100 to the projection end 102, the lens module 100 includes a first lens 11, an aperture 12 and a last lens 13, the first lens 11 is close to the projection end 102, the light passes through the first lens 11 to the projection end 102; the aperture 12 is close to the first lens 11; the last lens 13 is close to the panel end 101, and the panel end 101 emits light through the last lens 13; wherein, the first lens 11 has a first size D1, the last lens 13 has a second size D2, and the ratio of the first size D1 to the second size D2 is less than 0.8, so that the effect of having a larger light-emitting angle and easy installation can be achieved by adjusting the size of the first lens and the last lens.
[0023] Referring to Table 1, the first lens 11 has a first focal length, the last lens 13 has a second focal length, and the first focal length is smaller than the second focal length. In a specific implementation, the first focal length of the first lens 11 is 56.516 mm, the second focal length of the last lens 13 is 68.946 mm, and the first focal length of the first lens 11 is smaller than the second focal length of the last lens 13. Among them, the first size D1 of the first lens 11 is 21.2 mm, the second size D2 of the last lens 13 is 31.2 mm, and the ratio of the first size D1 of the first lens 11 to the second size D2 of the last lens 13 is 0.6795, which is less than 0.8. The specific size is selected based on the lens module 100 being suitable for the required projection device, but is not limited to this. However, the ratio of the first size D1 of the first lens 11 to the second size D2 of the last lens 13 is less than 0.8. In this way, the small size of the first lens 11 can be convenient for installation in the projection device, and the ratio range can be more suitable for the panel end 101 with a larger light-emitting angle.
[0024]
[0025] Reference Figure 1As shown, the lens module 100 further includes a second lens 14, which is located between the first lens 11 and the last lens 13. The light is emitted from the panel end 101, passes through the last lens 13, and then passes through the second lens 14 and then is emitted through the first lens 11 to the projection end 102. In a specific implementation, the aperture 12 is located between the first lens 11 and the second lens 14, and the distance between the aperture 12 and the first lens 11 is smaller than the distance between the aperture 12 and the second lens 14, that is, the aperture 12 is arranged closer to the first lens 11 than the second lens 14. In another embodiment, the aperture 12 may also be located between the first lens 11 and the projection end 102, and the distance between the aperture 12 and the first lens 11 is smaller than the distance between the aperture 12 and the projection end 102, that is, the aperture 12 is arranged relatively close to the first lens 11, and the arrangement is based on actual needs and is not limited thereto.
[0026] Continue to refer to Figure 1 As shown, the first lens 11 has a first lens 111 and a second lens 112. In the direction of the light, the first lens 111 and the second lens 112 are respectively located on both sides of the first lens 11, wherein the first lens 111 and the second lens 112 are both convex lenses. In specific implementation, the light passes through the second lens 112 and the first lens 111 in sequence and then emerges to the projection end 102. The first lens 11 is relatively small in size, but the second lens 112 and the first lens 111, which are positive lenses, can achieve a better uniform projection light effect.
[0027] Reference Figure 1 As shown, the second lens 14 has a third lens 141 and a fourth lens 142. In the direction of the light, the third lens 141 and the fourth lens 142 are respectively located on both sides of the second lens 14, and at least one of the third lens 141 and the fourth lens 142 is a concave lens. In specific implementation, the light is emitted from the panel end 101 and passes through the last lens 13 to enter the second lens 14. The light passes through the fourth lens 142 and the third lens 141 in sequence, passes through the aperture 12, and then passes through the second lens 112 and the first lens 111 of the first lens 11 in sequence to be emitted to the projection end 102. The third lens 141 of the second lens 14 is a negative lens to increase the angle of the light to the aperture 12, better reduce light loss, and ensure the intensity of light projection.
[0028] Reference Figure 1 As shown, the lens module 100 may further include a third lens 15, which is located between the second lens 14 and the last lens 13. The lens module 100 also includes a fourth lens 16, which is located between the third lens 15 and the last lens 13. In specific implementation, the first lens 11, the second lens 14, the third lens 15, the fourth lens 16 and the last lens 13 are all made of full glass lenses, and the parameters of each lens are selected as shown in Table 2 below.
[0029]
[0030] Reference Figure 1 to Figure 5 As shown, Figure 2 This is a horizontal light fan diagram of light passing through a lens module according to an embodiment of the utility model. Figure 3 This is a field curvature diagram and distortion diagram of light passing through a lens module according to an embodiment of the utility model. Figure 4 This is a light spot diagram of a light beam passing through a lens module according to an embodiment of the utility model. Figure 5 This is an MTF diagram of light passing through a lens module according to an embodiment of the present invention. Figure 2 As shown in the figure, the curves in each figure represent light of various wavelengths, which on the one hand represent monochromatic aberration, and on the other hand represent the magnitude of chromatic aberration. Figure 3 As shown, the ideal projection plane is a plane. Figure 3 The field curvature in means that the projected image plane is less curved; Figure 3 The distortion in the image refers to the degree of deformation, with positive and negative values representing pillow-shaped or barrel-shaped deformation, respectively. Figure 4 As shown in the figure, the light spot diagram shows the degree of resolution clarity or blurriness of each part of the picture. Figure 5 As shown, MTF refers to the resolution, sharpness and contrast of a lens. It can be seen that the projection module 100 has a good imaging effect.
[0031] The utility model also provides a projection device, which includes a panel end 101, a lens module 100 and a projection end 102. The panel end 101 emits light, and the light passes through the lens module 100, wherein the lens module 100 is the lens module 100 as described above, and the lens module 100 is suitable for a vehicle lens. The light passing through the lens module 100 is projected to the projection end 102.
[0032] In summary, the lens module and projection device provided by the utility model, the panel end emits light through the lens module to the projection end, the lens module includes a first lens, an aperture and a last lens, the first lens is close to the projection end, and the light passes through the first lens to the projection end; the aperture is close to the first lens; the last lens is close to the panel end, and the panel end emits light through the last lens; wherein the first lens has a first size, the last lens has a second size, and the ratio of the first size to the second size is less than 0.8, so that the effect of having a larger light-emitting angle and easy installation can be achieved by adjusting the sizes of the first lens and the last lens.
[0033] Although the utility model is described in conjunction with the accompanying drawings, the embodiments disclosed in the accompanying drawings are intended to exemplify the preferred embodiments of the utility model and should not be construed as limiting the utility model. In order to clearly describe the required components, the proportions in the schematic drawings do not represent the proportional relationship of the actual components.
[0034] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, any changes and modifications made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention.
Claims
1. A lens module, wherein light is emitted from a panel end through the lens module to a projection end, characterized in that: The lens module includes: A first lens is close to the projection end, and the light passes through the first lens to the projection end; an aperture, adjacent to the first lens; and A final lens is close to the panel end, and the panel end emits the light through the final lens; The first lens has a first size, the last lens has a second size, and a ratio of the first size to the second size is less than 0.
8.
2. The lens module according to claim 1, characterized in that: The first lens has a first focal length and the last lens has a second focal length, the first focal length being smaller than the second focal length.
3. The lens module according to claim 1, characterized in that: The aperture is located between the first lens and the projection end, and the distance between the aperture and the first lens is smaller than the distance between the aperture and the projection end.
4. The lens module according to claim 1, characterized in that: It also includes a second lens, which is located between the first lens and the last lens. The aperture is located between the first lens and the second lens, and the distance between the aperture and the first lens is smaller than the distance between the aperture and the second lens.
5. The lens module according to claim 4, characterized in that: The second lens has a third lens and a fourth lens. In the direction of the light, the third lens and the fourth lens are located on both sides of the second lens. At least one of the third lens and the fourth lens is a concave lens.
6. The lens module according to claim 4, characterized in that: The invention also comprises a third lens, which is located between the second lens and the last lens, and the third lens is an all-glass lens.
7. The lens module according to claim 6, characterized in that: The invention also comprises a fourth lens, which is located between the third lens and the last lens, and the fourth lens is an all-glass lens.
8. The lens module according to claim 1, characterized in that: The first lens has a first lens and a second lens. In the direction of the light, the first lens and the second lens are located on two sides of the first lens. The first lens and the second lens are convex lenses.
9. The lens module according to claim 1, wherein: It also includes a second lens, which is located between the first lens and the last lens. The first lens, the second lens and the last lens are all full glass lenses.
10. A projection device, characterized in that: include: At the panel end, light is emitted; The lens module as claimed in any one of claims 1 to 9, wherein the light passes through the lens module, and the lens module is used for a vehicle lens; and The projection end projects the light passing through the lens module.