CN111596510B

CN111596510B - Pattern generating device and its application

Info

Publication number: CN111596510B
Application number: CN202010553807.3A
Authority: CN
Inventors: 张丽; 段永胜; 彭勃; 陈吴斌; 金新波
Original assignee: Ningbo Fuerda Smartech Co Ltd
Current assignee: Ningbo Fuerda Smartech Co Ltd
Priority date: 2020-06-17
Filing date: 2020-06-17
Publication date: 2025-01-24
Anticipated expiration: 2040-06-17
Also published as: CN111596510A

Abstract

The pattern generating device is characterized by sequentially comprising a light source, an illumination lens group, a first imaging lens group, a second imaging lens group, a pattern plate, a third imaging lens group and an image sensor, wherein the focal length, the aperture and the field angle of the first imaging lens group and the third imaging lens group are the same, the angle of incident light rays of the second imaging lens group is the same as the angle of emergent light rays of the second imaging lens group, the pattern plate is positioned on an object plane of the third imaging lens group, and the image sensor is positioned on an image plane of the third imaging lens group. The invention also discloses application of the pattern generating device to the vehicle-mounted projection lamp. The generated logo piece pattern has the advantages of high definition, high contrast and high brightness.

Description

Pattern generating device and application thereof

Technical Field

The invention relates to a device for obtaining a pattern through lens projection, and also relates to application of the device to a vehicle-mounted projection lamp.

Background

The existing vehicle-mounted projection lamp is used for oblique projection, the lens processing error, stray light of a projection system, distortion of a projection lens and the like, so that the relationship between logo sheet patterns and ground projection patterns is complex. Therefore, influence factors such as oblique projection, processing errors of lenses, stray light of a projection system, distortion of an imaging lens and the like are eliminated, and visual corresponding relation between logo sheet patterns and ground patterns is obtained, so that the method is one of key technologies of the existing vehicle-mounted projection lamp.

The patent application of China patent application No. 201710733043.4 discloses an oblique projection film, a manufacturing method thereof and a projection lens (application publication No. CN 107329354A), and discloses an oblique projection film, a manufacturing method thereof and a projection lens, wherein the manufacturing method of the oblique projection film comprises the following steps of S1, establishing a projection model according to a projection view field obtained as required, an installation position of the projection lens and a view angle of the projection lens, S2, manufacturing a Sensor surface perpendicular to an optical axis of the projection lens in the projection model, placing an actual image to be obtained in the projection view field range, S3, projecting the actual image in the projection view field range on the Sensor surface by adopting a back projection method, and S4, scaling and adjusting the image on the Sensor surface, and then transferring the image to the projection film to obtain the projection film. The pattern on the logo sheet can be generated according to the steps S1 to S4, but in step S3, the actual image within the projection field of view is projected on the Sensor surface by the back projection method of the first projection method, and the influence of distortion of the projection lens, lens processing errors, stray light and the like cannot be eliminated by the back projection method of the first projection method. And, after the actual pattern is projected onto the sensor in the step 3, the final projection pattern can be obtained through adjustment and scaling in the step 4.

Disclosure of Invention

The first technical problem to be solved by the invention is to provide a pattern generating device for eliminating factors such as oblique projection, processing error, stray light, distortion and the like of an imaging lens so as to obtain an intuitive logo sheet pattern with high definition, high contrast and high brightness.

The second technical problem to be solved by the present invention is to provide a vehicle-mounted projection lamp application capable of generating a ground projection pattern with high brightness, high definition, high uniformity, no distortion and no stray light.

The pattern generating device is characterized by sequentially comprising a light source, an illumination lens group, a first imaging lens group, a second imaging lens group, a pattern plate, a third imaging lens group and an image sensor, wherein light rays emitted by the light source sequentially pass through the illumination lens group, the first imaging lens group and the second imaging lens group and then form uniform illumination light spots on the pattern plate, finally, the uniform illumination light spots are imaged on the pattern sensor through the third imaging lens group, the focal length, the aperture and the field angle of the first imaging lens group and the third imaging lens group are the same, the angle of incident light rays of the second imaging lens group is the same as the angle of emergent light rays of the second imaging lens group, the pattern plate is positioned on the object plane of the third imaging lens group, and the image sensor is positioned on the image plane of the third imaging lens group.

Further, the space angle of the pattern plate is α, β, γ, wherein α represents the angle between the pattern plate and the YZ plane, β represents the angle between the pattern plate and the XZ plane, γ represents the angle between the pattern plate and the XY plane, and 0 ° < α+.90 °,0 ° < β+.90 °,0 ° < γ+.90 °.

Preferably, the number of the optical lenses of the illumination lens group, the first imaging lens group, the second imaging lens group or the third imaging lens group is ∈ 1, the optical lenses are optical plastics or optical glass, and the surface of the optical lenses is a spherical surface, an aspherical surface, a free-form surface or a microlens array surface.

Preferably, the surface shape of the third imaging lens group is an actually processed surface shape.

Preferably, the illumination lens group includes a first illumination lens and a second illumination lens in sequence, the light incident surface of the first illumination lens is a vertical mirror surface, the light emergent surface is a convex lens, and the light incident surface and the light emergent surface of the second illumination lens are both convex lenses.

Preferably, the third imaging lens group includes a first imaging lens, a second imaging lens and a third imaging lens in order, wherein the light incident surface and the light emitting surface of the first imaging lens are both convex lenses, the light incident surface and the light emitting surface of the second imaging lens are both concave lenses, and the light incident surface and the light emitting surface of the third imaging lens are both convex lenses.

Preferably, the pattern plate is made of black light-absorbing material.

The technical scheme adopted by the invention for solving the second technical problem is that the pattern generating device is applied to the vehicle-mounted projection lamp.

Compared with the prior art, the logo sheet pattern imaging device has the advantages that the logo sheet patterns are directly imaged on the pattern sensor by adopting the plurality of imaging lens groups, the logo sheet patterns and the pattern plate are in one-to-one correspondence, and finally, factors such as oblique projection, processing error, stray light, distortion and the like of an imaging lens can be eliminated, so that the logo sheet patterns with intuitionistic, high definition, high contrast and high brightness are obtained.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment.

Fig. 2 is an enlarged view of the illumination lens assembly of fig. 1.

Fig. 3 is an enlarged view of the third imaging lens group of fig. 1.

Fig. 4 is a schematic view of the spatial angle of the plane of the pattern plate in fig. 1.

Fig. 5 shows a ground pattern applied to vehicle projection when α is 90 °, β is 0, and γ is 0 in the embodiment.

Fig. 6 shows the pattern of the corresponding logo patch in the vehicle projection, where α is 90 °, β is 0, and γ is 0 in the embodiment.

Fig. 7 shows a ground pattern applied to the vehicle projection when α is 62 °, β is 0, and γ is 0 in the embodiment.

Fig. 8 shows a pattern of 62 ° α,0 ° β, and 0 γ applied to a corresponding logo patch in vehicle projection in the embodiment.

Detailed Description

The invention is described in further detail below with reference to the embodiments of the drawings.

As shown in fig. 1, the pattern generating device in this embodiment sequentially includes a light source 4, an illumination lens group 5, a first imaging lens group 1, a second imaging lens group 2, a pattern plate 6, a third imaging lens group 3 and an image sensor 7, wherein light rays emitted by the light source 4 sequentially pass through the illumination lens group 5, the first imaging lens group 1 and the second imaging lens group 2, then form uniform illumination light spots on the pattern plate 6, finally form images on the image sensor through the third imaging lens group 3, focal lengths, apertures and angles of view of the first imaging lens group 1 and the third imaging lens group 3 are the same, angles of incident light rays of the second imaging lens group 2 are the same as angles of emergent light rays of the second imaging lens group 2, the pattern plate 6 is located on an object plane of the third imaging lens group 3, and the image sensor 7 is located on an image plane of the third imaging lens group 3. The pattern plate 6 in this embodiment adopts a light absorbing material of black.

The number of the optical lenses of the illumination lens group 5, the first imaging lens group 1, the second imaging lens group 2 or the third imaging lens group 3 is equal to or greater than 1, the optical lenses are optical plastics or optical glass, and the surface of the optical lenses is a spherical surface, an aspherical surface, a free-form surface or a micro lens array surface.

As shown in fig. 2, the illumination lens group 5 in this embodiment sequentially includes a first illumination lens 51 and a second illumination lens 52, where a light incident surface of the first illumination lens 51 is a vertical mirror surface, a light emitting surface is a convex lens, and a light incident surface and a light emitting surface of the second illumination lens 52 are both convex lenses.

As shown in fig. 3, the third imaging lens group 3 in the present embodiment includes a first imaging lens 31, a second imaging lens 32, and a third imaging lens 33 in this order, wherein the light incident surface and the light emitting surface of the first imaging lens 31 are both convex lenses, the light incident surface and the light emitting surface of the second imaging lens 32 are both concave lenses, and the light incident surface and the light emitting surface of the third imaging lens 33 are both convex lenses. The first imaging lens group and the second imaging lens group may be disposed with reference to the third imaging lens group.

Referring to fig. 4, the space angle of the pattern plate 6 is α, β, γ, where α represents the angle between the pattern plate 6 and YZ plane, β represents the angle between the pattern plate 6 and XZ plane, γ represents the angle between the pattern plate 6 and XY plane, and 0 ° < α+.ltoreq.90 °,0 ° < β+.ltoreq.90 °,0 ° < γ+.ltoreq.90°.

The pattern generation device provided by the invention gives the ground pattern and the corresponding alpha, beta and gamma, and the one-to-one correspondence between the ground pattern and the pattern on the logo sheet can be obtained.

Claims

1. The pattern generation device is characterized by sequentially comprising a light source (4), an illumination lens group (5), a first imaging lens group (1), a second imaging lens group (2), a pattern plate (6), a third imaging lens group (3) and an image sensor (7), wherein light rays emitted by the light source (4) sequentially pass through the illumination lens group (5), the first imaging lens group (1) and the second imaging lens group (2) and then form uniform illumination light spots on the pattern plate (6), finally, the uniform illumination light spots are imaged on the pattern sensor through the third imaging lens group (3), the focal length, aperture and view angle of the first imaging lens group (1) and the third imaging lens group (3) are the same, the angle of incident light rays of the second imaging lens group (2) is the same as the angle of emergent light rays of the second imaging lens group (2), the pattern plate (6) is positioned on the object plane of the third imaging lens group (3), and the image sensor (7) is positioned on the imaging plane of the third imaging lens group (3).

2. Pattern generating device according to claim 1, characterized in that the number of optical lenses of the illumination lens group (5), the first imaging lens group (1), the second imaging lens group (2) or the third imaging lens group (3) is ≡1.

3. The pattern generating apparatus according to claim 2, wherein the optical lens is an optical plastic or an optical glass.

4. The pattern generating apparatus according to claim 2, wherein the surface shape of the optical lens is a spherical surface, an aspherical surface, a free-form surface, or a microlens array surface.

5. The pattern generating apparatus as claimed in claim 2, wherein said illumination lens group (5) comprises a first illumination lens (51) and a second illumination lens (52) in this order, a light incident surface of said first illumination lens (51) being a vertical mirror surface, a light emitting surface being a convex lens, and a light incident surface and a light emitting surface of said second illumination lens (52) being both convex lenses.

6. The pattern generating device according to claim 2, wherein the third imaging lens group (3) comprises a first imaging lens (31), a second imaging lens (32) and a third imaging lens (33) in this order, the light incident surface and the light emitting surface of the first imaging lens (31) are both convex lenses, the light incident surface and the light emitting surface of the second imaging lens (32) are both concave lenses, and the light incident surface and the light emitting surface of the third imaging lens (33) are both convex lenses.

7. Pattern generating device according to claim 1, characterized in that the pattern plate (6) is made of a light absorbing material which is black.

8. Use of a pattern generating device according to any of claims 1-7 in a vehicle-mounted projection lamp.