Lens module and lens barrel

Abstract

A lens module and a lens barrel, the lens barrel defines an object side and an image side opposite to the object side, and includes: a barrel body including a first object side surface; a microstructure region on the first object side surface, wherein the microstructure region includes a plurality of convex portions; and a convex structure region surrounding the microstructure region, wherein the convex structure region is closer to the object side than the microstructure region, to protect the microstructure region from damage.

Description

Technical Field

[0001] The present invention relates to a lens module and lens barrel, and more particularly to a lens module in which the protruding structural region of the lens barrel is closer to the object side than the microstructure region, in order to protect the microstructure region from damage. Background Technology

[0002] Stray light is a general term for abnormally propagated light in a lens module, such as residual reflections from the lens barrel surface. Stray light can cause a decrease in the performance of the lens module, reduce the modulation transfer function of the lens module, and harm the imaging quality of the optical lens. Specifically, it manifests as reduced image sharpness, reduced sense of detail, and reduced color saturation.

[0003] Microstructured regions with unique structures are created on the surface of the lens barrel. If the surface of these microstructured regions is damaged (e.g., by pressure or impact), the surface color of the lens barrel will change from its original dark black to grayish-white. Such damage not only affects the appearance of the lens module but also prevents the lens barrel surface from effectively reducing light reflectivity, thus losing its original anti-reflective effect.

[0004] Furthermore, during various processes such as cleaning, inspection, assembly, and testing in the factory, the surface structure of lens barrels with microstructures is relatively fragile and easily damaged by collisions or abrasions. Lens barrels with microstructures are more susceptible to damage from even minor injuries, affecting their appearance and performance. This not only reduces product yield during the manufacturing process but also necessitates more stringent quality control for lens barrels with microstructures.

[0005] Patent document (publication number: TWI823385B) discloses an element for a lens module, the element comprising: an element surface; a flat region located on the element surface; and a microstructure region located on the element surface and adjacent to the flat region; wherein, relative to the flat region, the microstructure region includes a plurality of protrusions and a plurality of recesses. However, the patent document does not disclose how to protect the microstructure region from damage.

[0006] Therefore, there is a need to provide a lens module and lens barrel that can solve the aforementioned problems. Summary of the Invention

[0007] One objective of this invention is to provide a lens module in which the protruding structural area of ​​the lens barrel is closer to the object side than the microstructure area, so as to protect the microstructure area from damage.

[0008] In accordance with the above objectives, the present invention provides a lens barrel that defines an object side and an image side located opposite the object side, and includes: a barrel body including a first object side; a microstructure region located on the first object side, wherein the microstructure region includes a plurality of protrusions; and a protruding structure region surrounding the microstructure region, wherein the protruding structure region is closer to the object side than the microstructure region, for protecting the microstructure region from damage.

[0009] In some embodiments, the protrusion height of the protruding structural region relative to the microstructure region is 0.005~0.50 mm.

[0010] In some embodiments, the lens barrel is a two-piece lens barrel, and the lens barrel further includes a plurality of petal portions, each of the petal portions surrounding a first object side of the barrel body, and each petal portion including a second object side.

[0011] In some embodiments, the protruding structural region surrounds the microstructure region in a circumferential manner, and the protruding structural region is located at the edge of the first object side and the edge of the second object side.

[0012] In some embodiments, the protruding structural region partially surrounds the microstructure region, and the protruding structural region is located at the edge of the first object side; the protruding structural region is located at the edge of the second object side; or the protruding structural region is located on the entire surface of the second object side.

[0013] In some embodiments, the lens barrel is a one-piece lens barrel, the protruding structural area surrounds the microstructure area around its entire circumference, and the protruding structural area is located at the edge of the side of the first object.

[0014] In some embodiments, the lens barrel is a one-piece lens barrel, the protruding structural region partially surrounds the microstructure region, and the protruding structural region is located at the edge of the side of the first object.

[0015] In some embodiments, the protruding structural region partially surrounds the microstructure region, the protruding structural region includes at least two arcuate regions, and satisfies the following condition: 0.4 ≤ the ratio between the length of each of the arcuate regions of the protruding structural region and the circumference of the side surface of the object ≤ 0.9.

[0016] In some embodiments, the roughness of the protruding structural region is 0.005mm~0.030mm, and n protrusions are selected in any 0.1mm*0.1mm area of ​​the microstructure region, satisfying the following condition: 10≦n≦90.

[0017] The present invention further provides a lens module, comprising: the lens barrel; an imaging lens group disposed in the lens barrel, and including a plurality of optical lenses.

[0018] The object-side surface of the lens barrel of the lens module of the present invention is processed using a mold and then subjected to a process such as injection molding to ultimately form a microstructure region on the surface of the element that can cause multiple reflections of light, thereby changing the scattering distribution characteristics of the object-side surface of the lens barrel to achieve the effect of stray light suppression. Furthermore, the protruding structural region of the lens barrel of the lens module of the present invention is closer to the object side than the microstructure region, in order to protect the microstructure region from damage. Attached Figure Description

[0019] Figure 1 This is a plan view of the lens tube according to the first embodiment of the present invention.

[0020] Figure 2 This is a schematic cross-sectional view of the lens barrel along section line AA according to the first embodiment of the present invention.

[0021] Figure 3 This is a three-dimensional schematic diagram of the microstructure region of the lens barrel according to an embodiment of the present invention.

[0022] Figure 4 This is a first perspective view of the lens tube according to the first embodiment of the present invention.

[0023] Figure 5 This is a second perspective view of the lens tube according to the first embodiment of the present invention.

[0024] Figure 6 This is a third perspective view of the lens tube according to the first embodiment of the present invention.

[0025] Figure 7 This is a fourth perspective view of the lens tube according to the first embodiment of the present invention.

[0026] Figure 8 This is a first perspective view of the lens tube according to the second embodiment of the present invention.

[0027] Figure 9 This is a second perspective view of the lens tube according to a second embodiment of the present invention.

[0028] Figure 10 This is an exploded perspective view of a lens module according to an embodiment of the present invention.

[0029] Explanation of markings in the diagram: 1 Lens Module 10 Lens Barrel 101 Protruding Structure Area 1011 Arc Area 11 Barrel Body 111 Object Side 112 Microstructure Area 12 Petal Part 121 Second Object Side 13 Imaging Lens Group 131 Optical Lens H Height IS Image Side OS Object Side Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0031] Figure 1 This is a plan view of the lens tube according to the first embodiment of the present invention. Figure 2 This is a cross-sectional schematic diagram of the lens tube according to the first embodiment of the present invention. Figure 3 This is a three-dimensional schematic diagram of the microstructure region of the lens barrel according to an embodiment of the present invention. Please refer to... Figure 1 and Figure 2 The lens barrel 10 defines an object side OS and an image side IS located opposite the object side, and includes: a barrel body 11 including a first object side 111; a microstructure region 112 located on the first object side 111, wherein the microstructure region 112 includes a plurality of protrusions (e.g., Figure 3 As shown, within the microstructure region 112, a 0.1mm x 0.1mm area is selected to have n protrusions, satisfying the following condition: 10 ≤ n ≤ 90; and a protruding structural region 101 surrounds the microstructure region 112, wherein the protruding structural region 101 is closer to the object side OS than the microstructure region 112, to protect the microstructure region 112 from damage. The protrusion height H of the protruding structural region 101 relative to the microstructure region 112 is 0.005~0.50mm, to protect the microstructure region 112 from damage due to collision or wear. Preferably, the protrusion height H of the protruding structural region 101 relative to the microstructure region 112 is 0.02mm~0.10mm. The roughness of the protruding structural region 101 can be 0.005mm~0.030mm. In a first embodiment, the lens barrel 10 is a two-piece lens barrel, further comprising a plurality of petal portions 12, each petal portion 12 surrounding a first object side 111 of the barrel body 11, and each petal portion 12 including a second object side 121. Each petal portion 12 is integrally formed with the barrel body 11. The first object side 111 and the second object side 121 can be referred to as the top surface of the lens barrel 10.

[0032] Figure 4 This is a first perspective view of the lens barrel according to a first embodiment of the present invention. In one embodiment, the protruding structural region 101 surrounds the microstructure region 112 in a continuous manner, and the protruding structural region 101 is located at the edge of the first object side 111 and the edge of the second object side 121. "Surrounding in a continuous manner" means that the protruding structural region 101 continuously surrounds the edge of the first object side 111 and the edge of the second object side 121, and preferably has the effect of protecting the microstructure region 112 from damage.

[0033] Figure 5This is a second perspective view of the lens barrel according to a first embodiment of the present invention. In another embodiment, the protruding structural region 101 partially surrounds the microstructure region 112, and the protruding structural region 101 may be located at the edge of the first object side surface 111 (e.g., Figure 5 (As shown). Figure 6 This is a third perspective view of the lens barrel according to the first embodiment of the present invention. In another embodiment, the protruding structural region 101 partially surrounds the microstructure region, and the protruding structural region 101 may be located at the edge of the second object side 121 (e.g., Figure 6 (As shown). Figure 7 This is a fourth perspective view of the lens barrel according to the first embodiment of the present invention. In other embodiments, the protruding structural region 101 partially surrounds the microstructure region 112, and the protruding structural region 101 may be located on the entire surface of the second object side 121 (e.g., Figure 7 (As shown). Local surrounding means that the protruding structural area 101 intermittently surrounds the edge of the first object side 111 and / or the edge of the second object side 112, and has the effect of protecting the microstructure area 112 from damage.

[0034] Figure 8 This is a first perspective view of the lens barrel according to a second embodiment of the present invention. The lens barrel 10' of the second embodiment is generally similar to the lens barrel 10 of the first embodiment, and similar elements are labeled with similar reference numerals. In the second embodiment, the lens barrel 10' is a one-piece lens barrel, which does not include the petal portion. The protruding structural region 101 surrounds the microstructure region 112 in its entirety, and the protruding structural region 101 may be located at the edge of the first object side surface 111. "Surrounding in its entirety" means that the protruding structural region 101 continuously surrounds the edge of the first object side surface 111, and preferably has the effect of protecting the microstructure region 112 from damage.

[0035] Figure 9 This is a second perspective view of the lens barrel according to a second embodiment of the present invention. In other embodiments, the lens barrel 10' is a one-piece lens barrel, the protruding structural region 101 partially surrounds the microstructure region 112, and the protruding structural region 101 may be located at the edge of the first object side surface 111. The protruding structural region 101 includes at least two arcuate regions 1011 and satisfies the following condition: 0.4 ≤ the ratio between the length of each of the arcuate regions 1011 and the circumference of the object side surface 111 ≤ 0.9, but is not limited thereto. Partially surrounding means that the protruding structural region 101 intermittently surrounds the edge of the first object side surface 111, and has the effect of protecting the microstructure region 112 from damage.

[0036] Figure 10This is an exploded perspective view of a lens module according to an embodiment of the present invention. The lens module includes: a lens barrel 10' and an imaging lens group 13. The imaging lens group 13 is disposed in the lens barrel 10' and includes a plurality of optical lenses 131, but is not limited thereto. The object-side surface of the lens barrel of the lens module of the present invention is processed by a mold and then subjected to a process such as injection molding to finally form a microstructure region on the surface of the element that can cause multiple reflections of light, thereby changing the scattering distribution characteristics of the object-side surface of the lens barrel to achieve the effect of stray light suppression. Furthermore, the protruding structural region of the lens barrel of the lens module of the present invention is closer to the object side than the microstructure region, in order to protect the microstructure region from damage.

[0037] The lens module of the present invention can be applied to electronic imaging systems in photography, monitoring, automation equipment, vehicle surround view systems and Internet of Things devices, but is not limited thereto.

[0038] The embodiments described above are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention, or reasonable combinations of solutions from various embodiments, are all within the scope of protection of the present invention.

Claims

1. A lens barrel defining an object side and an image side located opposite said object side, characterized in that, Also includes: A cylindrical body, including a first object side surface; A microstructure region located on the first object side, wherein the microstructure region includes a plurality of protrusions; and a protruding structure region surrounding the microstructure region, wherein the protruding structure region is closer to the object side than the microstructure region, for protecting the microstructure region from damage.

2. The lens barrel as described in claim 1, characterized in that, The protrusion height of the protruding structural region compared to the microstructural region is 0.005~0.50mm.

3. The lens barrel as described in claim 1, characterized in that, The lens barrel is a two-piece lens barrel, and the lens barrel further includes a plurality of petal portions, each of the petal portions surrounding a first object side of the barrel body, and each petal portion including a second object side.

4. The lens barrel as described in claim 3, characterized in that, The protruding structural area surrounds the microstructure area in a full circumference, and the protruding structural area is located at the edge of the first object side and the edge of the second object side.

5. The lens barrel as described in claim 3, characterized in that, The protruding structural region partially surrounds the microstructure region, and the protruding structural region is located at the edge of the first object side; the protruding structural region is located at the edge of the second object side; or the protruding structural region is located on the entire surface of the second object side.

6. The lens barrel as described in claim 1, characterized in that, The lens barrel is a one-piece lens barrel, and the protruding structural area surrounds the microstructure area around its entire circumference, with the protruding structural area located at the edge of the side of the first object.

7. The lens barrel as described in claim 1, characterized in that, The lens barrel is a one-piece lens barrel, the protruding structural area partially surrounds the microstructure area, and the protruding structural area is located at the edge of the side of the first object.

8. The lens barrel as described in claim 1, characterized in that, The protruding structural region partially surrounds the microstructure region, and the protruding structural region includes at least two arcuate regions and satisfies the following condition: 0.4 ≤ the ratio between the length of each of the arcuate regions of the protruding structural region and the circumference of the side surface of the object ≤ 0.

9.

9. The lens barrel as described in claim 1, characterized in that, The roughness of the protruding structure region is 0.005mm~0.030mm, and there are n protrusions in any 0.1mm*0.1mm area of ​​the microstructure region, satisfying the following condition: 10≦n≦90.

10. A lens module, characterized in that, include: A lens barrel, which is the lens barrel as described in any one of claims 1 to 9; An imaging lens group is disposed in the lens barrel and includes a plurality of optical lenses.

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