CN219640074U - Digital car lamp projection lens - Google Patents
Digital car lamp projection lens Download PDFInfo
- Publication number
- CN219640074U CN219640074U CN202223529931.XU CN202223529931U CN219640074U CN 219640074 U CN219640074 U CN 219640074U CN 202223529931 U CN202223529931 U CN 202223529931U CN 219640074 U CN219640074 U CN 219640074U
- Authority
- CN
- China
- Prior art keywords
- lens
- image plane
- digital car
- car light
- object plane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 17
- 239000011347 resin Substances 0.000 claims abstract description 13
- 229920005989 resin Polymers 0.000 claims abstract description 13
- 239000011521 glass Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 10
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- 230000004075 alteration Effects 0.000 abstract description 15
- 238000003384 imaging method Methods 0.000 abstract description 12
- 238000000926 separation method Methods 0.000 abstract description 4
- 230000002411 adverse Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005286 illumination Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 206010052128 Glare Diseases 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000004313 glare Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 101100117236 Drosophila melanogaster speck gene Proteins 0.000 description 1
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Landscapes
- Lenses (AREA)
Abstract
The utility model discloses a digital car lamp projection lens, which is characterized in that a first lens L1 with positive focal power, an aperture STOP STOP, a second lens L2 with negative focal power and a third lens L3 with positive focal power are sequentially arranged from an object side to an image side along an optical axis, wherein the first lens L1 and the third lens L3 are biconvex lenses, and the second lens L2 is biconcave. The air space between the image plane of the first lens L1 and the object plane of the second lens L2 is larger than the air space between the image plane of the second lens L2 and the object plane of the third lens L3, and the first lens is a resin aspheric lens, and the second lens and the third lens are double-separation glass lenses. The utility model combines the glass spherical lens and the resin aspherical lens, effectively eliminates the adverse effect caused by various aberrations, solves the problem of contradiction between high brightness output and high definition, realizes imaging of pixel-level images, and has simple and light structure and good temperature resistance.
Description
Technical Field
The utility model relates to a lens, in particular to a digital car lamp projection lens, which is an intelligent projection car lamp lens with simple and light structure and better imaging quality.
Background
Along with the development of technology and the driving of the age, the intellectualization has become the standard of the current automobile, which not only refers to intelligent voice interaction and other functions in the automobile, but also the non-intelligent functional automobile lamp age is faced with replacement. For the intelligent car light era, the car light is endowed with the possibility of showing rich individuation and expanding wireless scene interaction, and the car light with simple illumination obviously cannot keep pace with the development of the car, so that under the background and the demand, the intelligent digital car light is inoculated. Compared with the traditional lighting lamp, the digital projection lamp can furthest reduce the glare risk of drivers facing the coming vehicles, and effectively improve the driving safety. In addition, in addition to preventing glare to the vehicle driver, the digital headlight has the further function of projecting high definition symbols onto the road, just like a projector, to provide the necessary information for pedestrians. Therefore, the digital headlight not only can provide information in the visual field of a driver directly, but also can be used for interactive communication with surrounding vehicles or pedestrians, so that driving experience is improved. Because the digital projection car lamp lens needs to have the functions of illumination and imaging, the imaging quality is correspondingly improved while the requirements of the car standard illumination brightness are met.
In the prior art, four or more lens combinations are mostly used to eliminate system aberration so as to improve imaging quality, which not only increases manufacturing cost and assembly difficulty, but also makes it more difficult to pass track-level measurement experiments. Therefore, how to obtain higher illumination brightness and imaging quality with fewer lenses is an urgent issue to be resolved.
Disclosure of Invention
In view of the above problems, the technical problem to be solved by the present utility model is to provide a three-lens optical lens for both illumination and imaging, which has the advantages of high imaging quality, simple structure, light weight, and the like, and meets the illumination imaging requirements of high brightness and ten-thousand-level pixels on the premise of low cost.
In order to solve the technical problems, the utility model adopts the following technical scheme: a digital car lamp projection lens sequentially comprises a first lens L1 with positive focal power, an aperture STOP STOP, a second lens L2 with negative focal power and a third lens L3 with positive focal power from an object side to an image side, wherein the object plane and the image plane of the first lens L1 are respectively S1 and S2, the object plane and the image plane of the second lens L2 are respectively S3 and S4, and the object plane and the image plane of the third lens L3 are respectively S5 and S6.
The present utility model employs a resin aspherical lens of positive power as the first lens L1, which takes on the main power of the system and serves to reduce the aberrations of the system. Meanwhile, the second lens L2 with negative focal power and the third lens L3 with positive focal power are combined into a double-separation lens group, so that chromatic aberration of an optical system is reduced, resolution of imaging is improved, and secondary focal power of the system is born. In addition, the refractive index of the third lens L3 with positive focal power is larger than 1.6, so that the incident angle of light on the image plane can be reduced, and the energy utilization rate of the light source is further improved.
The air interval between the image plane peak of the first lens L1 and the object plane peak of the second lens L2 is D 12 The air gap between the image plane vertex of the second lens L2 and the object plane vertex of the third lens L3 is D 23 ，D 12 >D 23 。
The curvature radius of the first lens L1 in the projection lens is R1 and R2, the curvature radius of the second lens L2 is R3 and R4, and the curvature radius of the third lens L3 is R5 and R6, wherein R is 1 |<|R 2 |,|R 5 |<|R 6 |。
The first lens L1 and the third lens L3 are both biconvex lenses, the second lens L2 is a biconcave lens, and the aperture STOP is located between the first lens L1 and the second lens L2.
Abbe number of the second lens L2Abbe number of the third lens L3 is less than 35 +.>Abbe number +.>And->-/>>10。
The third lens L3 is a high heat-resistant glass spherical lens or an aspheric lens, and the refractive index of the third lens L3 is larger than 1.6.
At least one of the first lens L1 and the second lens L2 is a resin aspheric lens, and the resin aspheric lens is made of a vehicle-scale PC material, a PMMA material or a COC/COP resin material.
The second lens L2 and the third lens L3 are a double-split lens group or a double-cemented lens group.
AR films are plated on object surfaces and image surfaces of at least one lens among the first lens L1, the second lens L2 and the third lens L3.
The focal length of the first lens L1 is f1, the effective focal length of the optical system is f, and f1 and f satisfy:。
the digital car lamp projection lens designed by the technical scheme effectively eliminates the adverse effect caused by various aberrations by combining the glass spherical lens and the resin aspherical lens, eliminates the chromatic aberration of the system, solves the problem of contradiction between high-brightness output and high definition, and realizes imaging of pixel-level images. Meanwhile, the weight of the whole optical machine is reduced by using the resin aspheric lens, so that the optical system is balanced between high image quality and low cost. Compared with the existing projection car lamp products on the market, the utility model has the beneficial effects that:
1. the lens is less, the structure is simple and light, and the miniaturization of the car light projection lens is facilitated.
2. The lens distortion is small.
3. The temperature resistance is good, and the aberration stability can be very good within the temperature range of-40 ℃ to 105 ℃.
4. The chromatic aberration of the lens is small, and under the condition of high contrast, the periphery of the image does not present obvious color edges and the image quality is clear.
Drawings
FIG. 1 is a schematic diagram of an optical system according to an embodiment of the present utility model;
FIG. 2 is a graph of MTF (modulation transfer function) at room temperature (20deg.C) for an embodiment of the present utility model;
FIG. 3 is a standard dot column diagram of an embodiment of the present utility model;
FIG. 4 is a graph of distortion curves for an embodiment of the present utility model;
fig. 5 is a graph of color difference in an embodiment of the present utility model.
Detailed Description
The utility model relates to a digital car lamp projection lens, which is specifically described below with reference to the accompanying drawings.
Referring to fig. 1, a first lens L1 with positive focal power, an aperture STOP, a second lens L2 with negative focal power, and a third lens L3 with positive focal power are sequentially arranged from an object side to an image side along an optical axis, wherein the object plane and the image plane of the first lens L1 are respectively S1 and S2, the object plane and the image plane of the second lens L2 are respectively S3 and S4, the object plane and the image plane of the third lens L3 are respectively S5 and S6, the object plane S1, the image plane S2, the object plane S5 and the image plane S6 are convex surfaces, and the object plane S3 and the image plane S4 are concave surfaces. The first lens L1 and the third lens L3 are both biconvex lenses, the second lens L2 is a biconcave lens, and the aperture STOP is located between the first lens L1 and the second lens L2.
One of the preferred parameters of a digital vehicle lamp projection lens embodiment of the present utility model is the focal length effl=30.48 mm, the aperture fno=0.76, the total optical length ttl=52.62 mm, and the rear intercept bfl=10.75 mm. The preferred values of the parameters associated with each lens are shown in Table 1:
TABLE 1
In the above table, the object plane curvature radius is infinity, i.e., a plane, the distance from the center vertex of the next surface (object plane S1 of the first lens L1) is 25000mm, and the materials of the optical design are each represented by a refractive index (Nd) and an abbe number (Vd).
Abbe number of the second lens L2Abbe number of the third lens L3 is less than 35 +.>Abbe number +.>And->-/>>10。
In the embodiment, the radii of curvature of the first lens L1 are R1 and R2, the radii of curvature of the second lens L2 are R3 and R4, and the radii of curvature of the third lens L3 are R5 and R6. The radius of curvature of the object plane S1 of the first lens L1 is smaller than the radius of curvature of the image plane S2 thereof, the radius of curvature of the object plane S3 of the second lens L2 is smaller than the radius of curvature of the image plane S4 thereof, and the radius of curvature of the object plane S5 of the third lens L3 is smaller than the radius of curvature of the image plane S6 thereof.
The distance between the vertex of the image plane S2 of the first lens L1 and the vertex of the object plane S3 of the second lens L2 is D 12 =4.66 mm, the distance between the vertex of the image plane S4 of the second lens L2 and the vertex of the object plane S5 of the third lens L3 is D 23 =0.35 mm, i.e.: d (D) 12 >D 23 。
At least one of the first lens L1 and the second lens L2 is a resin aspheric lens, the resin lens can be a vehicle-standard PC material and a PMMA material or a COC/COP resin material with good weather resistance, the aberration of each order of the system can be obviously reduced, the second lens L2 and the third lens L3 are double-separation lens groups so as to reduce the chromatic aberration of an optical system, the aspheric lens L2 in the double-separation lens groups can also play the role of eliminating part of spherical aberration, and meanwhile, the third lens L3 is a high-heat-resistant glass spherical lens or an aspheric lens so as to effectively improve the thermal stability of the optical lens.
The focal length of the first lens L1 is f1, the effective focal length of the optical system is f, and f1 and f satisfy:。
AR films are plated on object surfaces and image surfaces of at least one of the first lens L1, the second lens L2 and the third lens L3 so as to improve the transmittance and the light energy utilization rate of the optical system.
The first lens L1 and the second lens L2 are both even aspherical lenses. Wherein, even aspherical expression is as follows:
wherein c is the paraxial curvature of the aspherical surface,is a higher order term coefficient, K is a conic coefficient, where K= -e 2 E is the eccentricity of the conic section.
The preferred values of the aspherical parameters of the front and rear surfaces of the first lens L1 and the second lens L2 are shown in table 2:
TABLE 2
FIG. 1 is a block diagram of an optical system according to an embodiment of the present utility model, wherein the total system length TTL is 50.62mm and FNo is 0.755.
Fig. 2 is a graph of MTF (modulation transfer function) for an embodiment of the present utility model, in which the abscissa represents spatial frequency in units: line pair/millimeter (lp/mm), and ordinate indicates MTF value. As can be seen from fig. 2, in this embodiment, the concentration of the MTF curves of the small fields of view is relatively high, the MTF values are all above 60%, the image distortion is small, and the definition is high. The meridional curve and the sagittal curve of the large view field are scattered, and the astigmatic problem exists, but the meridional curve is very high, and the MTF value is above 50%.
Fig. 3 is a standard point chart of an embodiment of the present utility model, and as can be seen from fig. 3, the radius of the diffuse speck is smaller, the RMS radius of the maximum field of view is 39.78 μm, the GEO radius is 260.862 μm, the other fields of view are smaller than this value, the aberration is smaller, and the imaging quality is higher.
The RMS radius and GEO radius for each field of view are shown in table 3:
TABLE 3 Table 3
Fig. 4 is a distortion chart of an embodiment of the present utility model, and as can be seen from fig. 4, the distortion in the whole image plane of the embodiment is below 1.4%, the distortion of the image of the whole image plane is relatively small, and a low-distortion graph can be projected.
Fig. 5 is a graph of the chromatic aberration of an embodiment of the present utility model, and as can be seen from fig. 5, the axial chromatic aberration and the longitudinal chromatic aberration of this embodiment are relatively small.
The above description of the embodiment of the present utility model provides a digital car light projection lens with high brightness and high definition, and the best mode is used herein to describe the principles and embodiments of the present utility model, and the above description of the embodiment is only for helping to understand the method and core idea of the present utility model. Meanwhile, as those skilled in the art will have variations in the detailed description and the application scope in light of the present disclosure, the present disclosure should not be construed as limiting the present disclosure.
Claims (9)
1. A digital car light projection lens is characterized in that a first lens L1 with positive focal power, an aperture STOP STOP, a second lens L2 with negative focal power and a third lens L3 with positive focal power are sequentially arranged from an object side to an image side along an optical axis, the object plane and the image plane of the first lens L1 are respectively S1 and S2, the object plane and the image plane of the second lens L2 are respectively S3 and S4, and the object plane and the image plane of the third lens L3 are respectively S5 and S6;
the air space between the image plane of the first lens L1 and the object plane of the second lens L2 is D 12 The air space between the image plane of the second lens L2 and the object plane of the third lens L3 is D 23 ，D 12 >D 23 ；
The curvature radius of the first lens L1 in the projection lens is R1 and R2, the curvature radius of the second lens L2 is R3 and R4, and the curvature radius of the third lens L3 is R5 and R6, wherein R is 1 |<|R 2 |,|R 5 |<|R 6 |。
2. The projection lens of digital car light as set forth in claim 1, wherein said first lens L1 and said third lens L3 are both biconvex lenses, and said second lens L2 is a biconcave lens, and said aperture STOP is located between said first lens L1 and said second lens L2.
3. The digital car light projection lens as set forth in claim 1, wherein said second lens L2 has an Abbe numberAbbe number of the third lens L3 is less than 35 +.>Abbe number +.>And->-/>>10。
4. The projection lens of claim 1, wherein the third lens L3 is a high heat-resistant glass spherical lens or an aspheric lens, and the refractive index of the third lens L3 is greater than 1.6.
5. The projection lens of digital car light as claimed in claim 1, wherein at least one of said first lens L1 and said second lens L2 is a resin aspherical lens made of a car-size PC material, a PMMA material, or a COC/COP type resin material.
6. The projection lens of digital car light as claimed in claim 1, wherein the second lens L2 and the third lens L3 are a double-split lens group or a double-cemented lens group.
7. The projection lens of digital car light as claimed in claim 1, wherein the object plane and the image plane of at least one of the first lens L1, the second lens L2 and the third lens L3 are coated with AR film.
8. The digital car light projection lens as set forth in claim 1, wherein the first lens L1 has a focal length f1, and the optical system has an effective focal length f, and f1 and f satisfy:。
9. the digital car light projection lens as set forth in claim 1, wherein parameters of the first lens L1, the aperture STOP, the second lens L2 and the third lens L3 are as follows:
。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223529931.XU CN219640074U (en) | 2022-12-29 | 2022-12-29 | Digital car lamp projection lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223529931.XU CN219640074U (en) | 2022-12-29 | 2022-12-29 | Digital car lamp projection lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219640074U true CN219640074U (en) | 2023-09-05 |
Family
ID=87810151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223529931.XU Active CN219640074U (en) | 2022-12-29 | 2022-12-29 | Digital car lamp projection lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219640074U (en) |
-
2022
- 2022-12-29 CN CN202223529931.XU patent/CN219640074U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN214375538U (en) | Short-focus optical imaging lens | |
| CN108614344B (en) | Vehicle-mounted wide-angle lens | |
| CN219640074U (en) | Digital car lamp projection lens | |
| CN115185063B (en) | Large-aperture optical lens and imaging method thereof | |
| CN217718228U (en) | Telephoto type large aperture optical lens | |
| CN113391432B (en) | Large-aperture three-piece optical lens | |
| CN116164254A (en) | Digital car lamp projection lens | |
| CN115598795A (en) | Vehicle-mounted projection lens meeting athermalization and large offset requirements | |
| CN112612114B (en) | Low-distortion six-piece optical lens and imaging method thereof | |
| CN218938630U (en) | Four-piece type digital car lamp projection lens | |
| CN219085213U (en) | Four-piece lens digital car lamp projection lens | |
| CN208705555U (en) | A kind of wide-angle superstar lighting level high definition optical lens | |
| CN216792648U (en) | ADAS vehicle-mounted lens | |
| CN116338899A (en) | Four-piece lens digital car lamp projection lens | |
| CN217932238U (en) | Vehicle-mounted projection lens meeting athermalization and large offset requirements | |
| CN217785014U (en) | Take car light lens optical system of a plurality of lenses | |
| CN220894639U (en) | Projection lens for AR-HUD | |
| CN218413024U (en) | Large-aperture optical lens | |
| CN115951481A (en) | Four-piece type digital car lamp projection lens | |
| CN221200082U (en) | 8K ultra-wide angle fixed focus optical system | |
| CN218413027U (en) | Glass-plastic mixed panoramic optical system | |
| CN220551827U (en) | Welcome lamp lens group | |
| CN221726303U (en) | High definition projection lens | |
| CN221281315U (en) | Three-piece type small-volume DMS optical lens | |
| WO2024066634A1 (en) | Projection lens, projection device and vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |