TWI718752B - Plastic lens barrel, camera module and electronic device - Google Patents

Abstract

A plastic lens barrel has an inner space and is for accommodating an imaging lens set. The imaging lens set has an optical axis. The plastic lens barrel includes an object-side portion, an image-side portion and a tube portion. The object-side portion, which is close to an object side of the plastic lens barrel, includes an object-side opening and an object-side annular surface. The object-side annular surface surrounds the object-side opening and faces toward the object side. The image-side portion, which is close to an image side of the plastic lens barrel, includes an image-side opening. The tube portion, which surrounds the optical axis, connects the object-side portion and the image-side portion. The tube portion defines the inner space. The object-side annular surface includes a groove structure area. The groove structure area includes a plurality of groove structures. The groove structures are disposed in at least one of an arranging manner and an extending manner along a sagittal direction away from the optical axis. Therefore, it is favorable for providing the effects of reducing the stray light.

Description

Plastic lens barrel, camera module and electronic device

The present invention relates to a plastic lens barrel and a camera module, and particularly relates to a miniaturized camera module and a plastic lens barrel applied to an electronic device.

As the semiconductor process technology has become more sophisticated, the performance of electronic photosensitive elements has been improved, and the pixels can reach smaller sizes. Therefore, a camera module with high imaging quality has become an indispensable part.

With the rapid development of science and technology, the application range of electronic devices equipped with camera modules has become wider, and the requirements for camera modules have become more diversified. Because the camera modules in the past are not easy to meet the requirements of imaging quality, production efficiency, or production cost, etc. Therefore, a camera module and its components, such as a plastic lens barrel, that meet the aforementioned requirements have become the goal of the industry’s efforts.

The present invention provides a plastic lens barrel, a camera module, and an electronic device. The plurality of groove structures on the object side ring surface of the plastic lens barrel can effectively Reduce the reflection of non-imaging light hitting the surface of the plastic lens barrel and reduce the chance of non-imaging light entering the imaging lens group to improve the optical imaging quality.

2.0。藉此，以提供較佳的消除雜散光效果。 According to an embodiment of the present invention, there is provided a plastic lens barrel which has an internal space and is used for accommodating an imaging lens group. The imaging lens group has an optical axis. The plastic lens barrel includes an object side portion, an image side portion and a tubular portion. The object side portion is close to the object side of the plastic lens barrel, and the object side portion includes an object side opening and an object side annular surface. The object side annular surface surrounds the object side opening and faces the object side. The image side portion is close to the image side of the plastic lens barrel, and the image side portion includes an image side opening. The tubular part surrounds the optical axis, and the tubular part connects the object side and the image side, and defines the internal space. The object side annulus includes a groove structure area, the groove structure area includes a plurality of groove structures, and the plurality of groove structures are arranged along a sagittal direction away from the optical axis in at least one of arrangement and extension. The length of the groove structure area along the direction perpendicular to the optical axis is T, and the length of the groove structure area along the direction parallel to the optical axis is L, which satisfies the following conditions: 0.05<L/T

2.0. In this way, a better effect of eliminating stray light is provided.

According to the plastic lens barrel of the foregoing embodiment, the object side ring surface may further include an object side outer ring surface and an object side inner ring surface. The object side inner ring surface is closer to the optical axis than the object side outer ring surface, and the groove structure area is at least One part is arranged on the inner ring surface on the object side.

According to the plastic lens barrel of the foregoing embodiment, the groove structure area can be disposed on the object side inner ring surface and the object side outer ring surface.

According to the plastic lens barrel of the foregoing embodiment, the angle between the inner ring surface on the object side and the direction parallel to the optical axis is α, which can satisfy the following condition: 35 degrees<α<70 degrees.

According to the plastic lens barrel of the foregoing embodiment, each groove structure may have a smooth surface.

According to the plastic lens barrel of the foregoing embodiment, each groove structure may be strip-shaped.

According to the plastic lens barrel of the foregoing embodiment, the groove structure may have a V-shaped strip shape and include two inclined surfaces, both of which face the object side, and the two inclined surfaces extend toward the image side and intersect each other.

According to the plastic lens barrel of the foregoing embodiment, the included angle between the two inclined surfaces is θ, which can satisfy the following condition: 15 degrees<θ<85 degrees.

According to the plastic lens barrel of the foregoing embodiment, each groove structure may be a straight groove structure, and extends along the sagittal direction away from the optical axis, and the plurality of straight groove structures are regular along the circumferential direction of the optical axis arrangement.

According to the plastic lens barrel of the foregoing embodiment, the width of each straight groove structure in the circumferential direction away from the optical axis may be different from the width in the circumferential direction close to the optical axis.

According to the plastic lens barrel of the foregoing embodiment, the width of each straight groove structure in the circumferential direction away from the optical axis may be greater than the width in the circumferential direction close to the optical axis.

According to the plastic lens barrel of the foregoing embodiment, the depth of each straight groove structure along the direction parallel to the optical axis far away from the optical axis may be greater than the depth along the direction parallel to the optical axis near the optical axis.

Ns

540。 According to the plastic lens barrel of the foregoing embodiment, the number of straight groove structures is Ns, which can satisfy the following conditions: 60

Ns

540.

According to the plastic lens barrel of the foregoing embodiment, each groove structure may be a ring-shaped groove structure extending around the optical axis, and the plurality of ring-shaped groove structures are regularly arranged in a sagittal direction away from the optical axis.

Nt

25。 According to the plastic lens barrel of the foregoing embodiment, the number of ring-shaped groove structures is Nt, which can satisfy the following conditions: 5

Nt

25.

According to the plastic lens barrel of the foregoing embodiment, the plurality of groove structures can be regularly arranged along the circumferential direction of the optical axis and regularly arranged along the sagittal direction away from the optical axis. In the trench structure, a partition wall is arranged between two adjacent trench structures, and the partition wall separates two adjacent trench structures from each other.

Ni

1200。 According to the plastic lens barrel of the foregoing embodiment, the number of groove structures is Ni, which can satisfy the following conditions: 360

Ni

1200.

According to the plastic lens barrel of the foregoing embodiment, the partition wall may include at least one first partition wall arranged along the circumferential direction of the optical axis and at least one second partition wall arranged along the sagittal direction away from the optical axis. The height along the direction parallel to the optical axis is different from the height along the direction parallel to the optical axis of the second partition wall.

According to the plastic lens barrel of the foregoing embodiment, the maximum outer diameter of the groove structure area is φ o, and the maximum outer diameter of the plastic lens barrel is φ max, which can satisfy the following conditions: 0.2<φ o/φ max<0.9.

1.0。 According to the plastic lens barrel of the foregoing embodiment, the minimum inner diameter of the groove structure area is φ i, and the diameter of the object side opening of the plastic lens barrel is φ min, which can meet the following conditions: 0.75<φ min/φ i

1.0.

According to the plastic lens barrel of the foregoing embodiment, the depth of each groove structure along the direction parallel to the optical axis is d, which can satisfy the following condition: 0.04mm<d<0.30mm.

1.5。 According to the plastic lens barrel of the foregoing embodiment, the length of the groove structure area along the direction perpendicular to the optical axis is T, and the length of the groove structure area along the direction parallel to the optical axis is L, which can satisfy the following conditions: 0.3<L/ T

1.5.

With the plastic lens barrel of the foregoing embodiment, a groove structure shape with better effect of eliminating stray light can be provided, and it is advantageous for manufacturing.

According to an embodiment of the present invention, a camera module is provided, which includes the plastic lens barrel and imaging lens group of the foregoing embodiment, and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on the imaging surface of the imaging lens group. This contributes to miniaturization and has good imaging quality.

According to an embodiment of the present invention, there is provided an electronic device including the aforementioned camera module. In this way, the current high-standard imaging requirements for electronic devices can be met.

10, 20, 30, 40‧‧‧Electronic device

16‧‧‧Sensing components

17‧‧‧Auxiliary optics

17f、27f‧‧‧Flash module

17g, 27g‧‧‧focus assist module

18、28‧‧‧Imaging signal processing components

19‧‧‧User Interface

19a‧‧‧Touch screen

19b‧‧‧Button

77‧‧‧Circuit board

78‧‧‧Connector

11, 21a, 21b, 21c, 31, 41‧‧‧Camera module

12‧‧‧Imaging lens group

12i‧‧‧Image surface

13‧‧‧Electronic photosensitive element

14‧‧‧Auto Focus Unit

15‧‧‧Optical anti-shake components

100, 200, 300, 400, 500, 600, 700, 800‧‧‧Plastic lens barrel

110, 210, 310, 410, 510, 610, 710, 810

119, 219, 319, 419, 519, 619, 719, 819‧‧‧ side opening

113, 213, 313, 413, 513, 613, 713, 813‧‧‧ Object side ring

114, 214, 314, 414, 514, 614, 714, 814‧‧‧ Object side outer ring surface

115, 215, 315, 415, 515, 615, 715, 815‧‧‧ Object side inner ring surface

120, 220, 320, 420, 520, 620, 720, 820‧‧‧Trench structure area

130, 134, 230, 234, 330, 630, 730, 830, 834‧‧‧Straight groove structure

136, 236, 336‧‧‧ inclined plane

440, 540, 640, 740, 840‧‧‧Ring strip groove structure

446, 546‧‧‧inclined surface

650, 750, 850‧‧‧Trench structure

651, 751, 851‧‧‧The first partition

652, 752, 852‧‧‧Second partition

170, 270, 370, 470, 570, 670, 770, 870‧‧‧Tube

177, 277, 377, 477, 577, 677, 777, 877‧‧‧Internal space

180, 280, 380, 480, 580, 680, 780, 880‧‧‧Image side

189, 289, 389, 489, 589, 689, 789, 889‧‧‧Image side opening

z‧‧‧Optical axis

za‧‧‧object side

zb‧‧‧Image side

s‧‧‧Sagittal direction

T‧‧‧The length of the groove structure area along the direction perpendicular to the optical axis

L‧‧‧The length of the groove structure area along the direction parallel to the optical axis

α‧‧‧The angle between the inner ring surface on the object side and the direction parallel to the optical axis

θ‧‧‧The included angle between two inclined planes

w1, w2, w3, w4‧‧‧The width of the straight groove structure in the circumferential direction

d, d11, d12, d21, d22, d23, d24, d31, d32, d51, d52‧‧‧The depth of the groove structure along the direction parallel to the optical axis

h1‧‧‧The height of the first partition wall along the direction parallel to the optical axis

h2, h281, h282‧‧‧The height of the second partition wall along the direction parallel to the optical axis

φ o‧‧‧Maximum outer diameter of groove structure area

φ i‧‧‧Minimum inner diameter of groove structure area

φ max‧‧‧Maximum outer diameter of plastic lens barrel

φ min‧‧‧The diameter of the opening on the object side of the plastic lens barrel

FIG. 1A is a schematic diagram of the plastic lens barrel applied to a camera module according to the first embodiment of the present invention;

Figure 1B is a perspective view of the plastic lens barrel of the first embodiment;

FIG. 1C is a schematic diagram of the plastic lens barrel of the first embodiment;

Fig. 1D is a schematic diagram showing the parameters of the plastic lens barrel of the first embodiment;

Figure 1E shows a side view of the plastic lens barrel of the first embodiment;

Figure 2A is a perspective view of a plastic lens barrel according to a second embodiment of the present invention;

FIG. 2B is a schematic diagram of the plastic lens barrel of the second embodiment;

FIG. 2C is a schematic diagram showing the parameters of the plastic lens barrel of the second embodiment;

Figure 2D shows a side view of the plastic lens barrel of the second embodiment;

Figure 3A is a schematic diagram of a plastic lens barrel according to a third embodiment of the present invention;

FIG. 3B is a schematic diagram showing the parameters of the plastic lens barrel of the third embodiment;

Figure 3C shows a side view of the plastic lens barrel of the third embodiment;

4A is a perspective view of a plastic lens barrel according to a fourth embodiment of the present invention;

Fig. 4B shows a three-dimensional cross-sectional view according to the section line 4B-4B in Fig. 4A;

4C is a schematic diagram of the plastic lens barrel of the fourth embodiment;

4D is a schematic diagram showing the parameters of the plastic lens barrel of the fourth embodiment;

FIG. 4E shows a side view of the plastic lens barrel of the fourth embodiment;

FIG. 5A is a schematic diagram of a plastic lens barrel according to a fifth embodiment of the present invention;

FIG. 5B is a schematic diagram showing the parameters of the plastic lens barrel of the fifth embodiment;

Figure 5C shows a side view of the plastic lens barrel of the fifth embodiment;

6A is a schematic diagram of a plastic lens barrel according to a sixth embodiment of the present invention;

FIG. 6B is a schematic diagram showing the parameters of the plastic lens barrel of the sixth embodiment;

FIG. 6C shows a side view of the plastic lens barrel of the sixth embodiment;

FIG. 7A is a schematic diagram of a plastic lens barrel according to a seventh embodiment of the present invention;

FIG. 7B is a schematic diagram showing the parameters of the plastic lens barrel of the seventh embodiment;

Fig. 7C shows a side view of the plastic lens barrel of the seventh embodiment;

FIG. 8A is a perspective view of a plastic lens barrel according to an eighth embodiment of the present invention;

8B is a schematic diagram of the plastic lens barrel of the eighth embodiment;

FIG. 8C is a schematic diagram showing the parameters of the plastic lens barrel of the eighth embodiment;

FIG. 8D shows a side view of the plastic lens barrel of the eighth embodiment;

FIG. 9A is a schematic diagram of an electronic device according to a ninth embodiment of the present invention;

9B is another schematic diagram of the electronic device of the ninth embodiment;

9C is another schematic diagram of the electronic device of the ninth embodiment;

9D is a block diagram of the electronic device of the ninth embodiment;

Figure 10 is a schematic diagram of an electronic device according to a tenth embodiment of the present invention;

Figure 11 is a schematic diagram of an electronic device according to an eleventh embodiment of the present invention; and

Figure 12 is a schematic diagram of an electronic device according to a twelfth embodiment of the present invention.

<First embodiment>

Please refer to FIGS. 1A to 1D. FIG. 1A shows a schematic diagram of the plastic lens barrel 100 according to the first embodiment of the present invention applied to the camera module 11, and FIG. 1B shows the plastic lens barrel 100 according to the first embodiment. Fig. 1C is a schematic diagram of the plastic lens barrel 100 of the first embodiment, and Fig. 1C is also a cross-sectional view of the plastic lens barrel 100 passing through the optical axis z, and Fig. 1D shows the first embodiment A schematic diagram of the parameters of the plastic lens barrel 100, and FIG. 1D is also a cross-sectional view of another section of the plastic lens barrel 100 passing through the optical axis z. It can be seen from FIGS. 1A to 1D that the plastic lens barrel 100 has an internal space 177 for accommodating the imaging lens group 12, the imaging lens group 12 has an optical axis z, and the plastic lens barrel 100 includes an object side portion 110 and an image side portion 180 And tubular portion 170. Furthermore, the imaging lens group 12 includes a plurality of optical elements (not shown in the figure), wherein the optical elements can be transparent Mirror, Light Blocking Sheet, Spacer, Retainer, and not limited to this.

As can be seen from Figures 1A to 1D, the object side za is the direction toward the subject (not shown) of the camera module 11 and its imaging lens group 12, and the image side zb is toward the camera module 11 and its imaging lens. In the direction of the imaging surface 12i of the group 12, the plastic lens barrel 100 includes an object side portion 110, a tubular portion 170, and an image side portion 180 in sequence from the object side za to the image side zb. The object side portion 110 is close to the object side za of the plastic lens barrel 100. The object side portion 110 includes an object side opening 119 and an object side annular surface 113. The object side annular surface 113 surrounds the object side opening 119 and faces the object side za. The image side portion 180 is close to the image side zb of the plastic lens barrel 100, and the image side portion 180 includes an image side opening 189. The tubular portion 170 surrounds the optical axis z, and the tubular portion 170 connects the object side portion 110 and the image side portion 180 and defines an internal space 177.

Please refer to FIG. 1E, which shows a side view of the object side za of the plastic lens barrel 100 of the first embodiment. It can be seen from FIGS. 1B to 1E that the object side annular surface 113 includes a trench structure region 120, the trench structure region 120 includes a plurality of trench structures, each trench structure is a recessed structure, and a plurality of trench structures It is arranged along the sagittal direction (Sagittal Direction) s away from the optical axis z in at least one of the arrangement mode and the extension mode. Furthermore, the arrangement means that at least two of the plurality of groove structures are arranged discontinuously or discretely along the sagittal direction s away from the optical axis z, and the extension means means that the plurality of grooves are arranged discontinuously or discretely along the sagittal direction s away from the optical axis z. One of the structures extends continuously along the sagittal direction s away from the optical axis z. The sagittal direction s is perpendicular to the circumferential direction of the optical axis z (not otherwise labeled), wherein the circumferential direction is the tangential direction around the optical axis z, and the sagittal direction s can also be said to be away from the optical axis z Sagittal direction, sagittal near the optical axis z The direction is the direction from being close to the optical axis z to the direction away from the optical axis z, from the direction away from the optical axis z to the direction close to the optical axis z, and the radiation direction of the optical axis z. In the first embodiment, the trench structure area 120 includes a plurality of trench structures, and the plurality of trench structures are specifically a plurality of straight strip-shaped groove structures 130 and a plurality of straight strip-shaped groove structures 134, each having a straight strip shape. The groove structures 130 and 134 are arranged along the sagittal direction s away from the optical axis z in an extended manner. In this way, the surface of the plastic lens barrel 100 is provided with a groove structure (in the first embodiment specifically, straight groove structures 130, 134), which can effectively reduce the reflection of non-imaging light hitting the surface of the plastic lens barrel 100 and reduce non-imaging light. The imaging light enters the imaging lens group 12 to improve the optical imaging quality.

2.0。藉此，提供大範圍的溝槽結構，以提供較佳的消除雜散光效果。另外，其可滿足下列條件：0.3<L/T

1.5；或是0.05<L/T

1.0。此外，其可滿足下列條件：0.3<L/T

1.0。再者，參數T亦滿足條件式「T=(φ o-φ i)/2」，其中φ o為溝槽結構區120的最大外徑，φ i為溝槽結構區120的最小內徑。 It can be seen from Figure 1D that the length of the groove structure area 120 along the direction perpendicular to the optical axis z is T, and the length of the groove structure area 120 along the direction parallel to the optical axis z is L, which satisfies the following conditions: 0.05<L/T

2.0. In this way, a wide range of trench structures are provided to provide a better effect of eliminating stray light. In addition, it can meet the following conditions: 0.3<L/T

1.5; or 0.05<L/T

1.0. In addition, it can meet the following conditions: 0.3<L/T

1.0. Furthermore, the parameter T also satisfies the conditional expression “T=(φ o-φ i)/2”, where φ o is the maximum outer diameter of the trench structure area 120 and φ i is the minimum inner diameter of the trench structure area 120.

In detail, it can be seen from Figures 1B to 1E that the object-side annular surface 113 may further include an object-side outer annular surface 114 and an object-side inner annular surface 115, and the object-side inner annular surface 115 is closer to the object-side outer annular surface 114 For the optical axis z, at least a part of the groove structure area 120 is disposed on the inner ring surface 115 on the object side. Thereby, the trench structure region 120 is arranged closer to the optical axis z, which is beneficial to reduce the stray light in the range of the near optical axis z. In the first embodiment, a part of the trench structure area 120 (that is, the straight groove structure 130 included in the trench structure area 120) is disposed on the inner ring surface 115 on the object side.

The groove structure area 120 may be disposed on the object side inner ring surface 115 and the object side outer ring surface 114. In this way, the feasibility of providing groove structures on both surfaces with different angles (specifically, the object-side inner ring surface 115 and the object-side outer ring surface 114 in the first embodiment) is provided. In the first embodiment, the straight groove structure 130 included in the groove structure area 120 is disposed on the inner ring surface 115 on the object side, and the straight groove structure 134 included in the groove structure area 120 is disposed outside the object side. Each straight groove structure 130 corresponds to and connects to one of the straight groove structures 134, that is, each straight groove structure 134 corresponds to and connects to one of the straight groove structures 130.

It can be seen from Figure 1D that the angle between the object side inner ring surface 115 and the direction parallel to the optical axis z is α, which can satisfy the following condition: 35 degrees<α<70 degrees. Thereby, a better range for arranging the trench structure on a specific slope can be provided. Furthermore, the object side outer ring surface 114 may be perpendicular to the optical axis z, that is, the normal line of the object side outer ring surface 114 may be parallel to the optical axis z.

It can be seen from Figure 1E that the maximum outer diameter of the groove structure area 120 is φ o, and the maximum outer diameter of the plastic lens barrel 100 is φ max, which can satisfy the following conditions: 0.2<φ o/φ max<0.9. Thereby, a better area range for eliminating stray light is provided. According to the embodiment of the present invention, the parameter φ o is the largest of the outer diameters of the groove structure area 120 passing through the optical axis z (especially when the outer circumference of the groove structure area 120 is not a perfect circle), the parameter φ max is the largest of the outer diameters of the plastic lens barrel 100 passing through the optical axis z (especially when the outer circumference of the plastic lens barrel 100 is not a perfect circle).

1.0。藉此，溝槽結構區120靠近相機模組11的光圈(第一實施例中即物側開孔119)之設計，有助減少非成像光線進到成像透鏡組12的機會。依據本發明的實施例中，參數φ i即是溝槽結構區120的通過光軸z的內徑中最小者(特別是當溝槽結構區120的內周不為正圓形時)。 The minimum inner diameter of the groove structure area 120 is φ i, and the diameter of the object side opening 119 of the plastic lens barrel 100 is φ min, which can meet the following conditions: 0.75< φ min/φ i

1.0. Thereby, the design of the groove structure area 120 close to the aperture of the camera module 11 (the object side opening 119 in the first embodiment) helps reduce the chance of non-imaging light entering the imaging lens group 12. In the embodiment according to the present invention, the parameter φ i is the smallest of the inner diameters of the trench structure area 120 passing through the optical axis z (especially when the inner circumference of the trench structure area 120 is not a perfect circle).

In an embodiment according to the present invention, each groove structure may have a smooth surface, that is, at least part of the surface of each groove structure may be a smooth surface. In this way, the mold processing process of the plastic lens barrel 100 can be performed more easily. In the first embodiment, each straight groove structure 130, 134 has a smooth surface, and the entire surface of each straight groove structure 130, 134 is a smooth surface.

It can be seen from FIG. 1B to FIG. 1E that each of the straight strip-shaped groove structures 130 and 134 is strip-shaped. In this way, the feasibility of mold manufacturing of the plastic lens barrel 100 is provided. In an embodiment according to the present invention, each trench structure may be strip-shaped. Specifically, the strip-shaped groove structures can be straight strip-shaped (for example, the strip-shaped groove structures 130 and 134 in the first embodiment), ring-shaped strip, or arc-shaped along the extending direction (ie, the length direction). Strip shape, curved strip shape, and not limited to this.

The shape of each of the straight groove structures 130 and 134 may be a V-shaped strip. Specifically, each of the straight groove structures 130 and 134 is a straight strip with a V-shaped cross section. Each straight groove structure 130, 134 includes two inclined surfaces 136, both of the inclined surfaces 136 face the object side za, and the two inclined surfaces 136 extend toward the image side zb and intersect each other, that is, the intersection of the two inclined surfaces 136 is a V-shaped bottom end. . Thereby, a groove structure shape with better effect of eliminating stray light is provided, and it is advantageous for manufacturing.

It can be seen from Figure 1B that the angle between the two slopes 136 of each straight groove structure 130 is θ, and the angle between the two slopes 136 of each straight groove structure 134 is The included angle is θ, which can meet the following conditions: 15 degrees<θ<85 degrees. In this way, the release angle required for the plastic lens barrel 100 to be manufactured by injection molding can be provided, and the effect of eliminating stray light can be maintained.

It can be seen from FIGS. 1B to 1E that, in the first embodiment, each groove structure is each straight groove structure 130 or 134, and extends along the sagittal direction s away from the optical axis z, that is, in an extended manner Set along the sagittal direction s away from the optical axis z. The plurality of straight groove structures 130 are regularly arranged along the circumferential direction of the optical axis z, that is, the straight groove structures 130 have the same structure, and the distance between adjacent two of the straight groove structures 130 is the same. The plurality of straight groove structures 134 are regularly arranged along the circumferential direction of the optical axis z, that is, each straight groove structure 134 has the same structure, and the distance between adjacent two of the straight groove structures 134 is the same. Thereby, the manufacturing process of the plastic lens barrel 100 can be simplified, and the production efficiency can be improved.

Ns

540。藉此，提供直條狀溝槽結構130、134的結構稠密性與可製造性。具體而言，各直條狀溝槽結構130對應並連接直條狀溝槽結構134中一者，直條狀溝槽結構130的數量為144個，直條狀溝槽結構134的數量為144個，直條狀溝槽結構130、134的數量(即總數)Ns為288個。 The number (that is, the total number) of the straight groove structures 130 and 134 is Ns, which can meet the following conditions: 60

Ns

540. Thereby, the structural density and manufacturability of the straight groove structures 130 and 134 are provided. Specifically, each straight groove structure 130 corresponds to and connects to one of the straight groove structures 134, the number of the straight groove structures 130 is 144, and the number of the straight groove structures 134 is 144. The number of straight groove structures 130 and 134 (ie, the total number) Ns is 288.

It can be seen from Figure 1E that the width w1 of each straight groove structure 130 in the circumferential direction away from the optical axis z is different from the width w2 in the circumferential direction close to the optical axis z, and each straight groove structure 134 The width w3 in the circumferential direction away from the optical axis z is different from the width w4 in the circumferential direction close to the optical axis z. the same. In this way, the complexity of the trench structure is improved and the integrity of the trench structure is maintained.

The width w1 of each straight groove structure 130 in the circumferential direction away from the optical axis z is greater than the width w2 in the circumferential direction close to the optical axis z, and each straight groove structure 134 in the circumferential direction away from the optical axis z The width w3 of is greater than the width w4 in the circumferential direction near the optical axis z. In this way, the complexity of the trench structure is improved and the integrity of the trench structure is maintained.

It can be seen from Fig. 1D that the depth of each straight groove structure 130 along the direction parallel to the optical axis z away from the optical axis z (such as the parameter d11 shown in Fig. 1D) is greater than that along the direction parallel to the optical axis z close to the optical axis z. The depth in the z direction (as the parameter d12 shown in Fig. 1D), the depth of each straight groove structure 134 along the direction parallel to the optical axis z away from the optical axis z is greater than that along the direction parallel to the optical axis z close to the optical axis z The depth in the z direction. Thereby, the complexity of the trench structure is provided, and the effect of reducing reflected light is maintained. Specifically, the depth of each straight groove structure 130, 134 along the direction parallel to the optical axis z gradually decreases from a distance away from the optical axis z to a position close to the optical axis z.

The depth of each straight groove structure 130, 134 along the direction parallel to the optical axis z is d, which can satisfy the following condition: 0.04mm<d<0.30mm. In this way, a depth range with high efficiency in eliminating stray light is provided. In the first embodiment, the value of the parameter d of each straight groove structure 130, 134 varies with the position in the sagittal direction s, for example, the parameter d of each straight groove structure 130 away from the optical axis z The value (parameter d11 shown in Figure 1D) is different from the value of parameter d near the optical axis z (parameter d12 shown in Figure 1D), but The value of the parameter d at each position on each straight groove structure 130, 134 all meets the condition range of the parameter d described in this paragraph.

Please also refer to the following table 1, which lists the data defined by the plastic lens barrel 100 of the first embodiment of the present invention according to the aforementioned parameters, as shown in Figure 1B, Figure 1D, and Figure 1E.

<Second Embodiment>

Please refer to FIGS. 2A to 2C, where FIG. 2A is a perspective view of the plastic lens barrel 200 according to the second embodiment of the present invention, FIG. 2B is a schematic diagram of the plastic lens barrel 200 according to the second embodiment, and FIG. 2B Figure is also a cross-sectional view of a section of the plastic lens barrel 200 passing through the optical axis z, Figure 2C shows a schematic diagram of the parameters of the plastic lens barrel 200 of the second embodiment, and Figure 2C is also a passing optical axis of the plastic lens barrel 200 Sectional view of another section of z. It can be seen from FIGS. 2A to 2C that the plastic lens barrel 200 has an internal space 277 for accommodating an imaging lens group (not shown in the figure). The imaging lens group has an optical axis z. The plastic lens barrel 200 includes an object side portion 210 and an image The side portion 280 and the tubular portion 270.

From FIG. 2A to FIG. 2C, it can be seen that the plastic lens barrel 200 includes an object side portion 210, a tubular portion 270 and an image side portion 280 in order from the object side za to the image side zb. The object side portion 210 is close to the object side za of the plastic lens barrel 200, and the object side portion 210 includes an object side opening 219 and an object side ring surface 213, which surrounds the object side ring surface 213 The side hole 219 faces the object side za. The image side portion 280 is close to the image side zb of the plastic lens barrel 200, and the image side portion 280 includes an image side opening 289. The tubular portion 270 surrounds the optical axis z, and the tubular portion 270 connects the object side portion 210 and the image side portion 280 and defines an internal space 277.

Please refer to FIG. 2D, which shows a side view of the object side za of the plastic lens barrel 200 of the second embodiment. It can be seen from FIGS. 2A to 2D that the object side annular surface 213 includes a groove structure region 220, and the groove structure region 220 includes a plurality of groove structures, and the plurality of groove structures are specifically a plurality of straight strip groove structures. 230 and a plurality of straight groove structures 234, each of the straight groove structures 230, 234 is arranged in an extended manner along the sagittal direction s away from the optical axis z.

From Figures 2A to 2D, it can be seen that the object side annular surface 213 further includes the object side outer ring surface 214 and the object side inner ring surface 215. The object side inner ring surface 215 is closer to the optical axis z than the object side outer ring surface 214. A part of the groove structure area 220 (that is, the straight groove structure 230 included in the groove structure area 220) is disposed on the inner ring surface 215 on the object side. Specifically, the straight groove structure 230 included in the groove structure area 220 is disposed on the object side inner ring surface 215, and the straight strip groove structure 234 included in the groove structure area 220 is disposed on the object side outer ring surface. 214, and each straight strip groove structure 230 corresponds to and connects to one of the straight strip groove structures 234. Each straight groove structure 230, 234 has a smooth surface.

Each straight groove structure 230, 234 has a strip shape. Furthermore, the shape of each straight strip groove structure 230, 234 is a V-shaped strip. Each straight groove structure 230, 234 includes two inclined surfaces 236, both of the inclined surfaces 236 face the object side za, and the two inclined surfaces 236 extend toward the image side zb and intersect each other.

In the second embodiment, each groove structure is each straight strip-shaped groove structure 230 or 234, and extends along the sagittal direction s away from the optical axis z, that is, extends along the sagittal direction s away from the optical axis z. Set up. The plurality of straight groove structures 230 are regularly arranged along the circumferential direction of the optical axis z, and the plurality of straight groove structures 234 are regularly arranged along the circumferential direction of the optical axis z.

Specifically, each straight groove structure 230 corresponds to and is connected to one of the straight groove structures 234, the number of the straight groove structures 230 is 144, and the number of the straight groove structures 234 is 144. The number of straight groove structures 230 and 234 (ie, the total number) Ns is 288.

It can be seen from Fig. 2D that the width of each straight groove structure 230 in the circumferential direction away from the optical axis z is different from the width in the circumferential direction close to the optical axis z, and each straight groove structure 234 is away from the optical axis z. The width in the circumferential direction at the optical axis z is different from the width in the circumferential direction near the optical axis z. Further, the width of each straight groove structure 230 in the circumferential direction away from the optical axis z is greater than the width in the circumferential direction close to the optical axis z, and each straight groove structure 234 has a width along the circumferential direction away from the optical axis z. The width in the circumferential direction is greater than the width in the circumferential direction near the optical axis z.

It can be seen from Fig. 2C that the depth of each straight groove structure 230 along the direction parallel to the optical axis z away from the optical axis z (such as the parameter d23 shown in Fig. 2C) is greater than that along the direction parallel to the optical axis z close to the optical axis z. The depth in the z direction (such as the parameter d24 shown in Figure 2C), the depth of each straight groove structure 234 away from the optical axis z along the direction parallel to the optical axis z (such as the parameter d21 shown in Figure 2C) ) Is greater than the depth near the optical axis z along the direction parallel to the optical axis z (as the parameter d22 shown in Figure 2C). In the second embodiment, each straight groove structure 230, 234 is The depth in the direction parallel to the optical axis z gradually decreases from a distance away from the optical axis z to a position close to the optical axis z.

Please also refer to the following table two, which lists the data of the parameters in the plastic lens barrel 200 of the second embodiment of the present invention. The definition of each parameter is the same as that of the plastic lens barrel 100 of the first embodiment, and is shown in Fig. 2A, Shown in Figure 2C and Figure 2D.

<Third Embodiment>

Please refer to FIGS. 3A and 3B. FIG. 3A shows a schematic diagram of the plastic lens barrel 300 according to the third embodiment of the present invention, and FIG. 3A is also a cross-sectional view of the plastic lens barrel 300 through the optical axis z. 3B is a schematic diagram of the parameters of the plastic lens barrel 300 of the third embodiment, and FIG. 3B is also a cross-sectional view of another cross-section of the plastic lens barrel 300 passing through the optical axis z. It can be seen from FIGS. 3A and 3B that the plastic lens barrel 300 has an internal space 377 for accommodating an imaging lens group (not shown in the figure), the imaging lens group has an optical axis z, and the plastic lens barrel 300 includes an object side portion 310 and an image The side portion 380 and the tubular portion 370.

It can be seen from FIGS. 3A and 3B that the plastic lens barrel 300 includes an object side portion 310, a tubular portion 370 and an image side portion 380 in sequence from the object side za to the image side zb. The object side 310 is close to the object side za of the plastic lens barrel 300, and the object side 310 The object side opening 319 and the object side annular surface 313 are included. The object side annular surface 313 surrounds the object side opening 319 and faces the object side za. The image side portion 380 is close to the image side zb of the plastic lens barrel 300, and the image side portion 380 includes an image side opening 389. The tubular portion 370 surrounds the optical axis z, and the tubular portion 370 connects the object side portion 310 and the image side portion 380 and defines an internal space 377.

Please refer to FIG. 3C, which shows a side view of the object side za of the plastic lens barrel 300 of the third embodiment. It can be seen from FIGS. 3A to 3C that the object side ring surface 313 includes a groove structure region 320, and the groove structure region 320 includes a plurality of groove structures, and the plurality of groove structures are specifically a plurality of straight strip groove structures. 330. Each straight groove structure 330 is arranged along the sagittal direction s away from the optical axis z in an extended manner.

From Figures 3A to 3C, it can be seen that the object-side annular surface 313 further includes the object-side outer annular surface 314 and the object-side inner annular surface 315. The object-side inner annular surface 315 is closer to the optical axis z than the object-side outer annular surface 314. All of the groove structure area 320 (that is, all the straight groove structures 330) are disposed on the inner ring surface 315 on the object side. Each straight groove structure 330 has a smooth surface.

Each straight groove structure 330 has a strip shape. Furthermore, the shape of each straight groove structure 330 is a V-shaped strip. Each straight groove structure 330 includes two inclined surfaces 336, both of the inclined surfaces 336 face the object side za, and the two inclined surfaces 336 extend toward the image side zb and intersect each other.

In the third embodiment, each groove structure is each straight strip-shaped groove structure 330 and extends along the sagittal direction s away from the optical axis z, that is, is arranged in an extended manner along the sagittal direction s away from the optical axis z. Plural straight groove structure 330 They are regularly arranged in the circumferential direction of the optical axis z. Specifically, the number Ns of the straight groove structure 330 is 144.

It can be seen from FIG. 3C that the width of each straight groove structure 330 in the circumferential direction away from the optical axis z is different from the width in the circumferential direction close to the optical axis z. Furthermore, the width of each straight groove structure 330 in the circumferential direction away from the optical axis z is greater than the width in the circumferential direction close to the optical axis z.

It can be seen from Fig. 3B that the depth of each straight groove structure 330 along the direction parallel to the optical axis z away from the optical axis z (such as the parameter d31 shown in Fig. 3B) is greater than that of the direction parallel to the optical axis z close to the optical axis z. The depth in the z direction (parameter d32 shown in Figure 3B).

The depth of each straight groove structure 330 along the direction parallel to the optical axis z is d, which satisfies the following condition: 0.04mm<d<0.30mm. In the third embodiment, the value of the parameter d of each straight groove structure 330 varies with the position in the sagittal direction s, for example, the value of the parameter d of each straight groove structure 330 away from the optical axis z (Parameter d31 shown in Figure 3B) is different from the value of parameter d near the optical axis z (parameter d32 shown in Figure 3B), but the parameter d at each position on each straight groove structure 330 All the values meet the conditional range of parameter d described in this paragraph.

Please also refer to the following Table 3, which lists the data of the parameters in the plastic lens barrel 300 of the third embodiment of the present invention. The definition of each parameter is the same as that of the plastic lens barrel 100 of the first embodiment, as shown in Figures 3A to 3A. Shown in Figure 3C.

<Fourth Embodiment>

Please refer to FIGS. 4A to 4D. FIG. 4A shows a perspective view of a plastic lens barrel 400 according to a fourth embodiment of the present invention, and FIG. 4B shows a perspective cross-sectional view according to the section line 4B-4B of FIG. 4A. The cross-section in Figure 4B is shown as dots to show the structural features in Figure 4B more clearly. Figure 4C is a schematic diagram of the plastic lens barrel 400 of the fourth embodiment, and Figure 4C is also a plastic lens. A cross-sectional view of a section of the tube 400 passing through the optical axis z. FIG. 4D shows a schematic diagram of the parameters of the plastic lens barrel 400 of the fourth embodiment, and FIG. 4D is also another section of the plastic lens barrel 400 passing through the optical axis z. Section view. It can be seen from FIGS. 4A to 4D that the plastic lens barrel 400 has an internal space 477 for accommodating an imaging lens group (not shown in the figure), the imaging lens group has an optical axis z, and the plastic lens barrel 400 includes an object side portion 410 and an image The side portion 480 and the tubular portion 470.

It can be seen from FIGS. 4A to 4D that the plastic lens barrel 400 includes an object side portion 410, a tubular portion 470, and an image side portion 480 in sequence from the object side za to the image side zb. The object side portion 410 is close to the object side za of the plastic lens barrel 400. The object side portion 410 includes an object side opening 419 and an object side annular surface 413. The object side annular surface 413 surrounds the object side opening 419 and faces the object side za. The image side portion 480 is close to the image side zb of the plastic lens barrel 400, and the image side portion 480 includes an image side opening 489. The tubular portion 470 surrounds the optical axis z, and the tubular portion 470 connects the object side portion 410 and the image side portion 480 and defines an internal space 477.

Please refer to FIG. 4E, which is a side view of the object side za of the plastic lens barrel 400 of the fourth embodiment. From Figure 4A to Figure 4E, it can be seen that the object side annular surface 413 includes a groove structure region 420, which includes a plurality of groove structures, and the plurality of groove structures are specifically a plurality of ring-shaped groove structures 440, and the plurality of ring-shaped groove structures 440 are The arrangement is arranged along the sagittal direction s away from the optical axis z, that is, the plurality of ring-shaped groove structures 440 are arranged along the sagittal direction s away from the optical axis z.

It can be seen from Figures 4A to 4E that the object-side annular surface 413 further includes the object-side outer annular surface 414 and the object-side inner annular surface 415. The object-side inner annular surface 415 is closer to the optical axis z than the object-side outer annular surface 414. All of the groove structure area 420 (that is, all the ring-shaped groove structure 440) are disposed on the inner ring surface 415 on the object side. Each ring-shaped groove structure 440 has a smooth surface.

Each ring strip groove structure 440 has a strip shape. Furthermore, the shape of each ring-shaped groove structure 440 is a V-shaped strip shape. Specifically, each ring-shaped groove structure 440 is a ring-shaped strip with a V-shaped cross section. Each ring-shaped groove structure 440 includes two inclined surfaces 446, both of the inclined surfaces 446 face the object side za, and the two inclined surfaces 446 extend toward the image side zb and intersect each other. The angle between the two inclined surfaces 446 of each ring-shaped groove structure 440 is θ, which satisfies the following condition: 15 degrees<θ<85 degrees.

In the fourth embodiment, each groove structure is each ring-shaped groove structure 440 extending around the optical axis z, and the plurality of ring-shaped groove structures 440 are regularly arranged along the sagittal direction s away from the optical axis z, that is, Each ring-shaped groove structure 440 has the same structure, essentially the same structure or a similar structure, and the distance between each adjacent two in the ring-shaped groove structure 440 is the same. Thereby, the manufacturing process of the plastic lens barrel 400 can be simplified, and the production efficiency can be improved.

Nt

25。藉此，提供環條狀溝槽結構440的結構稠密性與可製造性。 The number of the ring-shaped groove structure 440 is Nt, which satisfies the following conditions: 5

Nt

25. Thereby, the structure density and manufacturability of the ring-shaped groove structure 440 are provided.

It can be seen from FIG. 4D that the groove structure region 420 has a ring-shaped groove structure 440 located far away from the optical axis z in a direction parallel to the optical axis z. The depth (parameter d shown in FIG. 4B) is equal to the position The depth of the ring-shaped groove structure 440 near the optical axis z along the direction parallel to the optical axis z. The depth of each ring-shaped groove structure 440 along the direction parallel to the optical axis z is d, which satisfies the following condition: 0.04mm<d<0.30mm. In the fourth embodiment, the value of the parameter d of the ring-shaped groove structure 440 at each position in the sagittal direction s is the same.

Please also refer to the following table 4, which lists the data of the parameters in the plastic lens barrel 400 of the fourth embodiment of the present invention. The definition of each parameter is based on the plastic lens barrel 400 of the fourth embodiment or the same as that of the first embodiment. The plastic lens barrel 100 is the same, and is shown in FIG. 4D and FIG. 4E.

<Fifth Embodiment>

Please refer to FIGS. 5A and 5B. FIG. 5A shows a schematic diagram of a plastic lens barrel 500 according to a fifth embodiment of the present invention, and FIG. 5A is also a cross-sectional view of the plastic lens barrel 500 passing through the optical axis z. , Figure 5B shows a schematic diagram of the parameters of the plastic lens barrel 500 of the fifth embodiment, and Figure 5B is also a plastic A cross-sectional view of another cross-section of the lens barrel 500 passing through the optical axis z. It can be seen from FIGS. 5A and 5B that the plastic lens barrel 500 has an internal space 577 for accommodating an imaging lens group (not shown in the figure). The imaging lens group has an optical axis z. The plastic lens barrel 500 includes an object side portion 510 and an image The side portion 580 and the tubular portion 570.

It can be seen from FIGS. 5A and 5B that the plastic lens barrel 500 includes an object side portion 510, a tubular portion 570 and an image side portion 580 in order from the object side za to the image side zb. The object side portion 510 is close to the object side za of the plastic lens barrel 500. The object side portion 510 includes an object side opening 519 and an object side annular surface 513. The object side annular surface 513 surrounds the object side opening 519 and faces the object side za. The image side portion 580 is close to the image side zb of the plastic lens barrel 500, and the image side portion 580 includes an image side opening 589. The tubular portion 570 surrounds the optical axis z. The tubular portion 570 connects the object side portion 510 and the image side portion 580 and defines an internal space 577.

Please refer to FIG. 5C, which is a side view of the object side za of the plastic lens barrel 500 of the fifth embodiment. It can be seen from FIGS. 5A to 5C that the object side ring surface 513 includes a groove structure region 520, and the groove structure region 520 includes a plurality of groove structures, and the plurality of groove structures are specifically a plurality of ring-shaped groove structures. 540. The plurality of ring-shaped groove structures 540 are arranged along the sagittal direction s away from the optical axis z, that is, the plurality of ring-shaped groove structures 540 are arranged along the sagittal direction away from the optical axis z. Arranged on s.

It can be seen from FIGS. 5A to 5C that the object side annular surface 513 further includes an object side outer ring surface 514 and an object side inner ring surface 515. The object side inner ring surface 515 is closer to the optical axis z than the object side outer ring surface 514. A part of the groove structure area 520 (that is, a part of the ring-shaped groove structure 540) is disposed on the inner ring surface 515 on the object side. Specifically, the groove structure area 520 is disposed on the object side inner ring surface 515 and the object side outer ring surface 514, that is, a part of the ring-shaped groove structure 540 is disposed on the inner ring surface 515 on the object side, and another part of the ring-shaped groove structure 540 is disposed on the outer ring surface 514 on the object side. Each ring-shaped groove structure 540 has a smooth surface.

Each ring strip groove structure 540 has a strip shape. Furthermore, the shape of each ring-shaped groove structure 540 is a V-shaped strip. Each ring-shaped groove structure 540 includes two inclined surfaces 546, both of the inclined surfaces 546 face the object side za, and the two inclined surfaces 546 extend toward the image side zb and intersect each other.

In the fifth embodiment, each groove structure is each ring-shaped groove structure 540, which extends around the optical axis z, and the ring-shaped groove structure 540 disposed on the inner ring surface 515 of the object side is along the vector away from the optical axis z. The ring-shaped groove structure 540 arranged on the outer ring surface 514 of the object side is regularly arranged along the sagittal direction s away from the optical axis z.

It can be seen from Figure 5B that the groove structure area 520 is located far away from the optical axis z in the depth of the ring-shaped groove structure 540 along the direction parallel to the optical axis z (as shown in Figure 5B, located in the outer ring of the object side The parameter d51 of the ring-shaped groove structure 540 on the surface 514 is greater than the depth of the ring-shaped groove structure 540 located near the optical axis z along the direction parallel to the optical axis z (as shown in Figure 5B, it is located on the object side). The parameter d52 of the ring-shaped groove structure 540 of the inner ring surface 515).

The depth of each ring-shaped groove structure 540 along the direction parallel to the optical axis z is d, which satisfies the following condition: 0.04mm<d<0.30mm. In the fifth embodiment, the value of the parameter d of the ring-shaped groove structure 540 at each position in the sagittal direction s is different, for example, the value of the parameter d of the ring-shaped groove structure 540 located far away from the optical axis z ( As shown in Figure 5B, the parameter d51) and the value of the parameter d of the ring-shaped groove structure 540 located near the optical axis z (as shown in Figure 5B) The parameter d52) shown is different, but the value of the parameter d of the ring-shaped groove structure 540 at each position in the sagittal direction s all meets the condition range of the parameter d described in this paragraph.

Please also refer to Table 5 below, which lists the parameter data in the plastic lens barrel 500 of the fifth embodiment of the present invention. The definition of each parameter is the same as the plastic lens barrel 100 of the first embodiment and the plastic lens barrel of the fourth embodiment. 400 is the same, and as shown in Figure 5B and Figure 5C.

<Sixth Embodiment>

Please refer to FIGS. 6A and 6B, where FIG. 6A is a schematic diagram of a plastic lens barrel 600 according to a sixth embodiment of the present invention, and FIG. 6A is also a cross-sectional view of the plastic lens barrel 600 passing through the optical axis z FIG. 6B is a schematic diagram showing the parameters of the plastic lens barrel 600 of the sixth embodiment, and FIG. 6B is also a cross-sectional view of another section of the plastic lens barrel 600 passing through the optical axis z. It can be seen from FIGS. 6A and 6B that the plastic lens barrel 600 has an internal space 677 for accommodating an imaging lens group (not shown). The imaging lens group has an optical axis z. The plastic lens barrel 600 includes an object side portion 610 and an image The side portion 680 and the tubular portion 670.

It can be seen from FIGS. 6A and 6B that the plastic lens barrel 600 includes an object side portion 610, a tubular portion 670, and an image side portion 680 in sequence from the object side za to the image side zb. The object side portion 610 is close to the object side za of the plastic lens barrel 600, and the object side portion 610 The object side opening 619 and the object side annular surface 613 are included. The object side annular surface 613 surrounds the object side opening 619 and faces the object side za. The image side portion 680 is close to the image side zb of the plastic lens barrel 600, and the image side portion 680 includes an image side opening 689. The tubular portion 670 surrounds the optical axis z, and the tubular portion 670 connects the object side portion 610 and the image side portion 680 and defines an internal space 677.

Please refer to FIG. 6C, which is a side view of the object side za of the plastic lens barrel 600 of the sixth embodiment. It can be seen from FIGS. 6A to 6C that the object side ring surface 613 includes a trench structure area 620, and the trench structure area 620 includes a plurality of groove structures 650, and the plurality of groove structures 650 are arranged along the distance away from the light. The sagittal direction s of the axis z is set, that is, the plurality of groove structures 650 are arranged along the sagittal direction s away from the optical axis z.

It can be seen from FIGS. 6A to 6C that the object side annular surface 613 further includes the object side outer ring surface 614 and the object side inner ring surface 615. The object side inner ring surface 615 is closer to the optical axis z than the object side outer ring surface 614. All of the groove structure area 620 (that is, all the groove structures 650) are disposed on the inner ring surface 615 on the object side. Each groove structure 650 has a smooth surface.

In the sixth embodiment, the groove structures 650 are regularly arranged along the circumferential direction of the optical axis z, and are regularly arranged along the sagittal direction s away from the optical axis z, that is, the groove structures 650 are arranged on the object side inner ring surface 615 Arranged in an array. In the trench structure 650, a partition wall (specifically, the first partition wall 651 or the second partition wall 652 in the sixth embodiment) is arranged between two adjacent trench structures 650, and each partition wall will correspond to the adjacent two grooves. The groove structures 650 are spaced apart from each other. In this way, the complexity of the groove structure 650 can be improved, and the mold processing and manufacturing of the plastic lens barrel 600 can be facilitated. Specifically, each trench structure 650 is a depression whose opening is trapezoidal as a whole. structure. According to other embodiments of the present invention, the groove structures are regularly arranged along the circumferential direction of the optical axis, and are regularly arranged in the sagittal direction s away from the optical axis, and each groove structure may be a concave structure with an opening in a polygonal shape with a straight edge. , The opening is a concave structure with an arc-shaped edge polygon, and it is not limited to this.

The partition wall includes at least one first partition wall 651 arranged along the circumferential direction of the optical axis z and at least one second partition wall 652 arranged along the sagittal direction s away from the optical axis z. In the sixth embodiment, the height of the first partition wall 651 along the direction parallel to the optical axis z is h1, and the height of the second partition wall 652 along the direction parallel to the optical axis z is h2 (as shown in Figure 6B). The height h1 of the partition wall 651 along the direction parallel to the optical axis z is the same as the height h2 of the second partition wall 652 along the direction parallel to the optical axis z, and the parameter h1 is not indicated in the drawing.

Ni

1200。藉此，提供溝槽結構650的結構稠密性並維持抗反射的功效。具體而言，溝槽結構650的數量Ni為630個。 The number of the trench structure 650 is Ni, which satisfies the following conditions: 360

Ni

1200. Thereby, the structural density of the trench structure 650 is provided and the anti-reflection effect is maintained. Specifically, the number Ni of the trench structures 650 is 630.

It can be seen from Fig. 6B that the depth of each groove structure 650 along the direction parallel to the optical axis z is d, which satisfies the following condition: 0.04mm<d<0.30mm. In the sixth embodiment, the value of the parameter d of each trench structure 650 is the same.

Observing the plurality of groove structures of the plastic lens barrel 600 in the sixth embodiment in another way, it can be seen from FIGS. 6A to 6C that the object side inner ring surface 615 of the object side ring surface 613 includes the groove structure area 620. The groove structure area 620 includes a plurality of groove structures, and the plurality of groove structures may be a plurality of straight strip-shaped groove structures 630 (the marking method in FIG. 6A and FIG. 6C is used to distinguish the groove structure 650). ), each straight strip groove structure 630 is extended along the distance It is arranged in the sagittal direction s away from the optical axis z, that is, each straight groove structure 630 is arranged by a partial number (specifically 7) of the aforementioned groove structures 650 along the sagittal direction s away from the optical axis z. Become. Each straight groove structure 630 has a smooth surface.

Each straight groove structure 630 has a strip shape. Each straight groove structure 630 extends along the sagittal direction s away from the optical axis z, that is, it extends along the sagittal direction s away from the optical axis z in an extended manner. The plurality of straight groove structures 630 are regularly arranged along the circumferential direction of the optical axis z. Specifically, the number Ns of the straight groove structure 630 is 90.

It can be seen from FIG. 6C that the width of each straight groove structure 630 in the circumferential direction away from the optical axis z is different from the width in the circumferential direction close to the optical axis z. Furthermore, the width of each straight groove structure 630 in the circumferential direction away from the optical axis z is greater than the width in the circumferential direction close to the optical axis z.

It can be seen from Fig. 6B that the depth of each straight groove structure 630 away from the optical axis z along the direction parallel to the optical axis z (such as the parameter d shown in Fig. 6B) is equal to the direction parallel to the optical axis z close to the optical axis z The depth in the z direction.

Observing the plurality of groove structures of the plastic lens barrel 600 in the sixth embodiment in another way, it can be seen from FIGS. 6A to 6C that the object side inner ring surface 615 of the object side ring surface 613 includes the groove structure area 620. The groove structure area 620 includes a plurality of groove structures, and the plurality of groove structures may be a plurality of ring-shaped groove structures 640 (the marking method in FIG. 6A and FIG. 6C is used to distinguish the groove structure 650). ), the plurality of ring-shaped groove structures 640 are arranged along the sagittal direction s away from the optical axis z, that is, the plurality of ring-shaped groove structures 640 are arranged along the sagittal direction away from the optical axis z Arranged on s, and each ring strip groove The groove structure 640 is formed by a partial number (specifically 90) of the aforementioned groove structures 650 arranged along the circumferential direction of the optical axis z. Each ring-shaped groove structure 640 has a smooth surface.

Each ring strip groove structure 640 has a strip shape. Each ring-shaped groove structure 640 extends around the optical axis z, and the plurality of ring-shaped groove structures 640 are regularly arranged along the sagittal direction s away from the optical axis z. Specifically, the number Nt of the ring-shaped groove structure 640 is seven.

Please also refer to Table 6 below, which lists the data of the parameters in the plastic lens barrel 600 of the sixth embodiment of the present invention. The definition of each parameter is based on the plastic lens barrel 600 of the sixth embodiment or the same as that of the first embodiment. The plastic lens barrel 100 is the same as the plastic lens barrel 400 of the fourth embodiment, and is shown in FIG. 6B and FIG. 6C.

<Seventh Embodiment>

Please refer to FIGS. 7A and 7B, where FIG. 7A is a schematic diagram of a plastic lens barrel 700 according to a seventh embodiment of the present invention, and FIG. 7A is also a cross-sectional view of the plastic lens barrel 700 passing through the optical axis z , The plastic lens barrel 700 in Figure 7A is partially represented by dots to show the structural features in Figure 7A more clearly, and Figure 7B shows the parameters of the plastic lens barrel 700 of the seventh embodiment It is a schematic diagram, and FIG. 7B is also a cross-sectional view of another cross-section of the plastic lens barrel 700 passing through the optical axis z. It can be seen from FIGS. 7A and 7B that the plastic lens barrel 700 has an internal space 777 for accommodating an imaging lens group (not shown in the figure), the imaging lens group has an optical axis z, and the plastic lens barrel 700 includes an object side portion 710 and an image The side portion 780 and the tubular portion 770.

It can be seen from FIGS. 7A and 7B that the plastic lens barrel 700 includes an object side portion 710, a tubular portion 770, and an image side portion 780 in order from the object side za to the image side zb. The object side portion 710 is close to the object side za of the plastic lens barrel 700. The object side portion 710 includes an object side opening 719 and an object side annular surface 713. The object side annular surface 713 surrounds the object side opening 719 and faces the object side za. The image side portion 780 is close to the image side zb of the plastic lens barrel 700, and the image side portion 780 includes an image side opening 789. The tubular portion 770 surrounds the optical axis z, and the tubular portion 770 connects the object side portion 710 and the image side portion 780, and defines an internal space 777.

Please refer to FIG. 7C, which is a side view of the object side za of the plastic lens barrel 700 of the seventh embodiment. It can be seen from FIGS. 7A to 7C that the object side ring surface 713 includes a groove structure area 720, and the groove structure area 720 includes a plurality of groove structures 750, and the plurality of groove structures 750 are arranged along the distance away from the light. The sagittal direction s of the axis z is set, that is, the plurality of groove structures 750 are arranged along the sagittal direction s away from the optical axis z.

It can be seen from FIGS. 7A to 7C that the object side annular surface 713 further includes the object side outer ring surface 714 and the object side inner ring surface 715. The object side inner ring surface 715 is closer to the optical axis z than the object side outer ring surface 714. All of the groove structure area 720 (that is, all the groove structure 750) are disposed on the inner ring surface 715 on the object side. Each groove structure 750 has a smooth surface.

In the seventh embodiment, the groove structures 750 are regularly arranged along the circumferential direction of the optical axis z, and are regularly arranged along the sagittal direction s away from the optical axis z, that is, the groove structures 750 are arranged on the object side inner ring surface 715 with Arranged in an array. In the trench structure 750, a partition wall (specifically, the first partition wall 751 or the second partition wall 752) is arranged between two adjacent trench structures 750, and each partition wall will correspond to the two adjacent grooves. The groove structures 750 are spaced apart from each other. Specifically, each trench structure 750 is a recessed structure whose opening is trapezoidal as a whole.

The partition wall includes at least one first partition wall 751 arranged along the circumferential direction of the optical axis z and at least one second partition wall 752 arranged along the sagittal direction s away from the optical axis z. The first partition wall 751 is parallel to the optical axis z. The height in the direction of is different from the height of the second partition wall 752 along the direction parallel to the optical axis z. Thereby, when the plastic lens barrel 700 is released from the mold, the groove structure 750 is effectively prevented from being twisted, and the integrity of the groove structure 750 is maintained. It can be seen from FIGS. 7A and 7B that the height h1 of the first partition wall 751 in the direction parallel to the optical axis z (as shown in FIG. 7B) is greater than the height h2 of the second partition wall 752 in the direction parallel to the optical axis z ( (As shown in Figure 7B). Specifically, the number Ni of the trench structures 750 is 630.

In the seventh embodiment, the depth of each groove structure 750 along the direction parallel to the optical axis z is d, the value of the parameter d of each groove structure 750 is the same, and the value of the parameter d is the same as the parameter h1 (as shown in Fig. 7B) The value of is the same, and the parameter d is not marked in the diagram.

Observing the plurality of groove structures of the plastic lens barrel 700 in the seventh embodiment in another way, it can be seen from FIGS. 7A to 7C that the object side inner ring surface 715 of the object side ring surface 713 includes the groove structure area 720. Groove structure area 720 packets Containing a plurality of groove structures, the plurality of groove structures may specifically be a plurality of straight strip-shaped groove structures 730, and each straight strip-shaped groove structure 730 is arranged in an extended manner along the sagittal direction s away from the optical axis z, That is, each straight groove structure 730 is composed of a partial number (specifically 7) of the aforementioned groove structure 750 and a partial number of the aforementioned second partition wall 752 arranged in an alternating arrangement along the sagittal direction s away from the optical axis z. Become. Each straight groove structure 730 has a smooth surface.

Each straight groove structure 730 has a strip shape. Each straight groove structure 730 extends along the sagittal direction s away from the optical axis z, that is, is arranged in an extended manner along the sagittal direction s away from the optical axis z. The plurality of straight groove structures 730 are regularly arranged along the circumferential direction of the optical axis z. Specifically, the number Ns of the straight groove structure 730 is 90.

It can be seen from FIG. 7C that the width of each straight groove structure 730 in the circumferential direction away from the optical axis z is different from the width in the circumferential direction close to the optical axis z. Furthermore, the width of each straight groove structure 730 in the circumferential direction away from the optical axis z is greater than the width in the circumferential direction close to the optical axis z.

It can be seen from Fig. 7B that the depth of each straight groove structure 730 in the direction parallel to the optical axis z away from the optical axis z (the same as the parameter h1 shown in Fig. 7B) is equal to the parallel light near the optical axis z. The depth in the direction of the axis z.

Observing the plural groove structures of the plastic lens barrel 700 in the seventh embodiment in another way, it can be seen from FIGS. 7A to 7C that the object side inner ring surface 715 of the object side ring surface 713 includes the groove structure area 720. The groove structure area 720 includes a plurality of groove structures, and the plurality of groove structures may specifically be a plurality of ring-shaped groove structures 740, and the plurality of ring-shaped groove structures 740 are arranged along a distance away from the optical axis. The sagittal direction s of z is set, that is, the plurality of ring-shaped grooves The groove structures 740 are arranged along the sagittal direction s away from the optical axis z, and each ring-shaped groove structure 740 is composed of a partial number (specifically 90) of the aforementioned groove structures 750 arranged along the circumferential direction of the optical axis z. Become. Each ring-shaped groove structure 740 has a smooth surface.

Each ring strip groove structure 740 has a strip shape. Each ring-shaped groove structure 740 extends around the optical axis z, and the plurality of ring-shaped groove structures 740 are regularly arranged along the sagittal direction s away from the optical axis z. Specifically, the number Nt of the ring-shaped groove structure 740 is seven.

Please also refer to Table 7 below, which lists the parameter data of the plastic lens barrel 700 of the seventh embodiment of the present invention. The definition of each parameter is the same as the plastic lens barrel 100 of the first embodiment and the plastic lens barrel of the fourth embodiment. The plastic lens barrel 400 of the sixth embodiment is the same as that of the sixth embodiment, and is shown in FIG. 7B and FIG. 7C.

<Eighth Embodiment>

Please refer to FIGS. 8A to 8C, where FIG. 8A is a perspective view of a plastic lens barrel 800 of an eighth embodiment of the present invention, FIG. 8B is a schematic diagram of a plastic lens barrel 800 of the eighth embodiment, and FIG. 8B Figure is also a cross-sectional view of a section of the plastic lens barrel 800 passing through the optical axis z. Figure 8C shows a schematic diagram of the parameters of the plastic lens barrel 800 of the eighth embodiment, and Figure 8C is also a plastic lens barrel A cross-sectional view of another cross-section of 800 passing through the optical axis z. From Figures 8A to 8C, it can be seen that the plastic lens barrel 800 has an internal space 877 for accommodating the imaging lens group (not shown in the figure), the imaging lens group has an optical axis z, and the plastic lens barrel 800 includes an object side portion 810 and an image The side portion 880 and the tubular portion 870.

It can be seen from FIGS. 8A to 8C that the plastic lens barrel 800 includes an object side portion 810, a tubular portion 870, and an image side portion 880 in order from the object side za to the image side zb. The object side portion 810 is close to the object side za of the plastic lens barrel 800. The object side portion 810 includes an object side opening 819 and an object side annular surface 813. The object side annular surface 813 surrounds the object side opening 819 and faces the object side za. The image side portion 880 is close to the image side zb of the plastic lens barrel 800, and the image side portion 880 includes an image side opening 889. The tubular portion 870 surrounds the optical axis z, and the tubular portion 870 connects the object side portion 810 and the image side portion 880 and defines an internal space 877.

Please refer to FIG. 8D, which is a side view of the object side za of the plastic lens barrel 800 of the eighth embodiment. It can be seen from FIGS. 8A to 8D that the object side annular surface 813 includes a trench structure region 820, and the trench structure region 820 includes a plurality of trench structures 850, and the plurality of trench structures 850 are arranged along the distance away from the light. The sagittal direction s of the axis z is set, that is, the plurality of groove structures 850 are arranged along the sagittal direction s away from the optical axis z.

It can be seen from Figures 8A to 8D that the object-side annular surface 813 further includes the object-side outer annular surface 814 and the object-side inner annular surface 815. The object-side inner annular surface 815 is closer to the optical axis z than the object-side outer annular surface 814. A part of the groove structure area 820 (that is, a part of the groove structure 850) is disposed on the inner ring surface 815 on the object side. Specifically, the groove structure area 820 is disposed on the object side inner ring surface 815 and the object side outer ring surface 814, that is, a part of the groove structure 850 is disposed on the object side inner ring surface 815, and the other part A number of groove structures 850 are disposed on the outer ring surface 814 on the object side. Each groove structure 850 has a smooth surface.

In the eighth embodiment, the groove structures 850 are regularly arranged along the circumferential direction of the optical axis z, and are regularly arranged along the sagittal direction s away from the optical axis z, that is, the groove structures 850 are arranged on the object side inner ring surface 815 with Arranged in an array. In the trench structure 850, a partition wall (specifically, the first partition wall 851 or the second partition wall 852 in the eighth embodiment) is arranged between each adjacent two trench structures 850, and each partition wall corresponds to the two adjacent grooves. The groove structures 850 are spaced apart from each other. Specifically, each trench structure 850 is a recessed structure whose opening is trapezoidal as a whole.

The partition wall includes at least one first partition wall 851 arranged along the circumferential direction of the optical axis z and at least one second partition wall 852 arranged along the sagittal direction s away from the optical axis z. The first partition wall 851 is parallel to the optical axis z. The height in the direction of is different from the height of the second partition wall 852 in the direction parallel to the optical axis z. It can be seen from FIGS. 8A to 8C that the height h1 of the first partition wall 851 in the direction parallel to the optical axis z (as shown in FIG. 8C) is greater than the height h281 of the second partition wall 852 in the direction parallel to the optical axis z. h282, where the parameters h281 and h282 shown in Figure 8C represent the height of the second partition wall 852 located on the object side outer ring surface 814 and the object side inner ring surface 815 along the direction parallel to the optical axis z, and the value of the parameter h281 Greater than the value of parameter h282. Specifically, the number Ni of trench structures 850 is 810.

In the eighth embodiment, the depth of each trench structure 850 along the direction parallel to the optical axis z is d, the value of the parameter d of each trench structure 850 is the same, and the value of the parameter d is the same as the parameter h1 (as shown in Fig. 8C) The value of is the same, and the parameter d is not marked in the diagram.

Observing the plurality of groove structures of the plastic lens barrel 800 in the eighth embodiment in another way, it can be seen from FIGS. 8A to 8D that the object side annular surface 813 includes a groove structure area 820, and the groove structure area 820 includes a plurality of groove structures. In particular, the plurality of groove structures may be a plurality of straight groove structures 830 and a plurality of straight groove structures 834, each of the straight groove structures 830 and 834 is extended away from each other. The sagittal direction s of the optical axis z is set, that is, each straight groove structure 830 on the inner ring surface 815 on the object side is composed of a partial number (specifically 7) of the aforementioned groove structure 850 and a partial number of the aforementioned second The partition walls 852 are arranged in an alternating arrangement along the sagittal direction s away from the optical axis z. Each straight groove structure 834 located on the outer ring surface 814 on the object side is composed of a partial number (specifically 2) of the aforementioned The groove structure 850 and a part of the aforementioned second partition walls 852 are arranged in an alternating arrangement along the sagittal direction s away from the optical axis z, and each straight groove structure 830 corresponds to and connects the straight groove structure One of 834. Each straight groove structure 830, 834 has a smooth surface.

Each straight strip-shaped groove structure 830, 834 is strip-shaped. Each straight groove structure 830, 834 extends along the sagittal direction s away from the optical axis z, that is, extends along the sagittal direction s away from the optical axis z in an extended manner. The plurality of straight groove structures 830 are regularly arranged along the circumferential direction of the optical axis z, and the plurality of straight groove structures 834 are regularly arranged along the circumferential direction of the optical axis z. Specifically, the number of straight strip-shaped groove structures 830 is 90, the number of straight strip-shaped groove structures 834 is 90, and the number (ie, the total number) Ns of straight strip-shaped groove structures 830 and 834 is 180.

It can be seen from Figure 8D that the width of each straight groove structure 830 in the circumferential direction away from the optical axis z and the width in the circumferential direction close to the optical axis z The degree is different, and the width of each straight groove structure 834 in the circumferential direction away from the optical axis z is different from the width in the circumferential direction close to the optical axis z. Further, the width of each straight groove structure 830 in the circumferential direction away from the optical axis z is greater than the width in the circumferential direction close to the optical axis z, and each straight groove structure 834 extends along the circumference away from the optical axis z. The width in the circumferential direction is greater than the width in the circumferential direction near the optical axis z.

It can be seen from Figure 8C that the depth of each straight groove structure 830 away from the optical axis z along the direction parallel to the optical axis z is equal to the depth near the optical axis z along the direction parallel to the optical axis z (its value is the same as that of the 8C The parameter h1 shown in the figure is the same), the depth of each straight groove structure 834 away from the optical axis z along the direction parallel to the optical axis z is equal to the depth near the optical axis z along the direction parallel to the optical axis z (its value Same as the parameter h1 shown in Figure 8C).

Observing the multiple groove structures of the plastic lens barrel 800 in the eighth embodiment in another way, it can be seen from FIGS. 8A to 8D that the object side inner ring surface 815 of the object side ring surface 813 includes the groove structure area 820. The groove structure area 820 includes a plurality of groove structures, and the plurality of groove structures may specifically be a plurality of ring-shaped groove structures 840, and the plurality of ring-shaped groove structures 840 are arranged along the distance away from the optical axis. The sagittal direction s of z is set, that is, the plurality of ring-shaped groove structures 840 are arranged in the sagittal direction s away from the optical axis z, and each ring-shaped groove structure 840 is composed of a partial number (specifically 90 (4) of the aforementioned groove structures 850 are arranged along the circumferential direction of the optical axis z. Each ring-shaped groove structure 840 has a smooth surface.

Each ring strip groove structure 840 has a strip shape. Each ring-shaped groove structure 840 extends around the optical axis z, and the plurality of ring-shaped groove structures 840 extend away from the light The axis z is regularly arranged in the sagittal direction s. Specifically, the number Nt of the ring-shaped groove structure 840 is nine.

Please also refer to Table 8 below, which lists the parameter data in the plastic lens barrel 800 of the eighth embodiment of the present invention. The definition of each parameter is the same as the plastic lens barrel 100 of the first embodiment and the plastic lens barrel of the fourth embodiment. The plastic lens barrel 400 of the sixth embodiment is the same as that of the sixth embodiment, and is shown in FIG. 8C and FIG. 8D.

<Ninth Embodiment>

With reference to FIGS. 9A to 9C, FIG. 9A shows a schematic diagram of the electronic device 10 according to the ninth embodiment of the present invention, FIG. 9B shows another schematic diagram of the electronic device 10 according to the ninth embodiment, and FIG. 9C Another schematic diagram of the electronic device 10 of the ninth embodiment is shown, and FIGS. 9A to 9C are particularly schematic diagrams of components related to the photographic function of the electronic device 10. It can be seen from FIGS. 1A and 9A to 9C that the electronic device 10 of the ninth embodiment is a smart phone, and the electronic device 10 includes a camera module 11, wherein the camera module 11 includes a plastic lens barrel according to the present invention 100 (it should be understood that it can also be other plastic lens barrels according to the present invention), the imaging lens group 12 and the electronic photosensitive element 13, and the electronic photosensitive element 13 is disposed on the imaging surface 12 i of the imaging lens group 12. With this, It contributes to miniaturization and has good imaging quality, so it can meet today's high-standard imaging requirements for electronic devices.

Furthermore, the user enters the shooting mode through the user interface 19 of the electronic device 10. The user interface 19 in the ninth embodiment can be a touch screen 19a, buttons 19b, and so on. At this time, the imaging lens group 12 collects the imaging light on the electronic photosensitive element 13 and outputs electronic signals related to the image to an imaging signal processor (Image Signal Processor, ISP) 18.

With reference to FIG. 9D, it shows a block diagram of the electronic device 10 in the ninth embodiment, particularly a block diagram of a camera in the electronic device 10. It can be seen from FIGS. 9A to 9D that, in accordance with the camera specifications of the electronic device 10, the camera module 11 may further include an autofocus component 14 and an optical anti-shake component 15, and the electronic device 10 may further include at least one auxiliary optical element 17 and At least one sensing element 16. The auxiliary optical element 17 may be a flash module 17f that compensates for color temperature, an infrared distance measuring element, a focus assist module 17g, etc., and the sensing element 16 may have the function of sensing physical momentum and actuation energy, such as accelerometers, gyroscopes, and holograms. The Hall Effect Element is used to sense the shaking and shaking of the user’s hand or the external environment, so as to enable the auto-focus component 14 and the optical anti-shake component 15 of the camera module 11 to function to achieve a good The high imaging quality helps the electronic device 10 according to the present invention have multiple modes of shooting functions, such as optimized self-timer, low-light HDR (High Dynamic Range, high dynamic range imaging), high-resolution 4K (4K Resolution) video recording, etc. In addition, the user can directly visually view the shooting screen of the camera on the touch screen 19a, and manually operate the viewfinder range on the touch screen 19a to achieve a WYSIWYG autofocus function.

Furthermore, it can be seen from Figure 9C that the camera module 11, the sensing element 16 and the auxiliary optical element 17 can be arranged on the circuit board 77 (the circuit board 77 is a flexible printed circuit board, Flexible Printed Circuit Board, FPC), and connected The device 78 is electrically connected to related components such as the imaging signal processing component 18 to perform the shooting process. Current electronic devices such as smart phones have a trend of being thinner and lighter. The camera module and related components are arranged on a flexible circuit board, and then the connector is used to integrate the circuit to the main board of the electronic device, which can meet the mechanical design of the limited space inside the electronic device And circuit layout requirements and to obtain a larger margin, also make the auto focus function of the camera module obtain more flexible control through the touch screen of the electronic device. In the ninth embodiment, the electronic device 10 includes a plurality of sensing elements 16 and a plurality of auxiliary optical elements 17. The sensing elements 16 and the auxiliary optical elements 17 are arranged on the circuit board 77 and at least one other flexible circuit board (not labeled), The imaging signal processing component 18 and other related components are electrically connected through the corresponding connector to perform the shooting process. In other embodiments (not shown in the figure), the sensing element and the auxiliary optical element can also be arranged on the main board of the electronic device or other forms of carrier board according to the mechanical design and circuit layout requirements.

In addition, the electronic device 10 may further include, but is not limited to, a wireless communication unit (Wireless Communication Unit), a control unit (Control Unit), a storage unit (Storage Unit), a temporary storage unit (RAM), a read-only storage unit (ROM) or the like combination.

<Tenth Embodiment>

Please refer to FIG. 10, which shows a schematic diagram of an electronic device 20 according to a tenth embodiment of the present invention. It can be seen from Figure 10 that the electronic device 20 is a smart phone, and the electronic device 20 includes camera modules 21a, 21b, 21c, and cameras The modules 21a, 21b, and 21c face the same side of the electronic device 20 and may have different optical characteristics. At least one of the camera modules 21a, 21b, 21c includes a plastic lens barrel according to the present invention, an imaging lens group and an electronic photosensitive element, and the electronic photosensitive element is disposed on the imaging surface of the imaging lens group. According to other embodiments of the present invention (not shown in the figure), the electronic device may be a dual-lens (ie, two camera modules) smart phone, a three-lens smart phone, a four-lens smart phone, a dual-lens tablet computer, etc. The electronic device of the lens.

In the shooting process of the electronic device 20, with the assistance of auxiliary optical elements such as the flash module 27f, the focus assist module 27g, etc., several images can be captured through the camera modules 21a, 21b, 21c, and then the electronic device 20 is equipped The processing elements (such as the imaging signal processing element 28, etc.) achieve the desired effects such as zooming and delicate images. In addition, it should be understood that the multi-lens configuration of the camera module in the electronic device according to the present invention is not limited to that disclosed in FIG. 10.

<Eleventh Embodiment>

With reference to FIG. 11, it is a schematic diagram of an electronic device 30 according to an eleventh embodiment of the present invention. The electronic device 30 of the eleventh embodiment is a tablet computer. The electronic device 30 includes a camera module 31, wherein the camera module 31 includes a plastic lens barrel (not shown) according to the present invention, and an imaging lens group (not shown) ) And an electronic photosensitive element (not shown in the figure), the electronic photosensitive element is arranged on the imaging surface of the imaging lens group.

<Twelfth Embodiment>

With reference to FIG. 12, it shows a schematic diagram of an electronic device 40 according to a twelfth embodiment of the present invention. The electronic device 40 of the twelfth embodiment is a wearable device. The electronic device 40 includes a camera module 41, wherein the camera module 41 includes a plastic lens barrel (not shown in the figure) according to the present invention, an imaging lens group (not shown in the figure) and an electronic photosensitive element (not shown in the figure), and the electronic photosensitive element is arranged on the imaging surface of the imaging lens group.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone who is familiar with the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention The scope shall be subject to those defined by the attached patent scope.

100‧‧‧Plastic lens barrel

110‧‧‧Object side

119‧‧‧ Hole on the object side

113‧‧‧Object side ring surface

114‧‧‧Object side outer ring surface

115‧‧‧Object side inner ring surface

120‧‧‧Trench structure area

130、134‧‧‧Straight groove structure

136‧‧‧Slope

170‧‧‧Tube

180‧‧‧Image side

θ‧‧‧The included angle between two inclined planes

Claims (23)

A plastic lens barrel has an internal space and is used for accommodating an imaging lens group. The imaging lens group has an optical axis. The plastic lens barrel includes an object side portion close to an object side of the plastic lens barrel. The object side portion includes an object side opening and an object side annular surface, the object side annular surface surrounds the object side opening and faces the object side; an image side portion is close to an image side of the plastic lens barrel, the image The side portion includes an image side opening; and a tubular portion surrounding the optical axis, the tubular portion connects the object side portion and the image side portion, and defines the internal space; wherein the object side ring surface includes a groove The structure area, an object-side outer ring surface, and an object-side inner ring surface, the groove structure area includes a plurality of groove structures, and the groove structures are arranged along a vector away from the optical axis in at least one of arrangement and extension The object-side inner ring surface is closer to the optical axis than the object-side outer ring surface, and at least a part of the groove structure area is disposed on the object-side inner ring surface; wherein, the groove structure area is perpendicular to the The length in the direction of the optical axis is T, and the length of the groove structure area along the direction parallel to the optical axis is L, which satisfies the following conditions: 0.05<L/T

2.0. According to the plastic lens barrel described in item 1 of the scope of patent application, the groove structure area is disposed on the object-side inner ring surface and the object-side outer ring surface. For the plastic lens barrel described in item 1 of the scope of patent application, the angle between the inner ring surface of the object side and the direction parallel to the optical axis is α, which satisfies the following condition: 35°<α<70°. In the plastic lens barrel described in item 1 of the scope of patent application, each of the groove structures has a smooth surface. In the plastic lens barrel described in item 1 of the scope of patent application, each of the groove structures is strip-shaped. The plastic lens barrel described in item 5 of the scope of patent application, wherein each groove structure has a V-shaped strip shape and includes two inclined surfaces, both of the inclined surfaces face the object side, and the two inclined surfaces extend toward the image side And rendezvous with each other. For the plastic lens barrel described in item 6 of the scope of patent application, the included angle between the two inclined surfaces is θ, which satisfies the following condition: 15 degrees<θ<85 degrees. The plastic lens barrel described in item 6 of the scope of patent application, wherein each of the groove structures is a straight groove structure and extends along the sagittal direction away from the optical axis, the straight groove structures They are regularly arranged in a circumferential direction along the optical axis. According to the plastic lens barrel described in item 8 of the scope of patent application, the width of each straight groove structure in the circumferential direction away from the optical axis is different from the width in the circumferential direction close to the optical axis. According to the plastic lens barrel described in item 9 of the scope of patent application, the width of each straight groove structure in the circumferential direction away from the optical axis is greater than the width in the circumferential direction close to the optical axis. For the plastic lens barrel described in item 10 of the scope of patent application, the depth of each of the straight groove structures along the direction parallel to the optical axis far away from the optical axis is greater than the depth of each of the straight groove structures along the direction parallel to the optical axis near the optical axis The depth of the direction. For the plastic lens barrel described in item 8 of the scope of patent application, the number of the straight groove structures is Ns, which meets the following conditions: 60

Ns

540. According to the plastic lens barrel described in item 6 of the scope of patent application, each of the groove structures is a ring-shaped groove structure extending around the optical axis, and the ring-shaped groove structures are along the distance away from the optical axis. Arranged regularly in the sagittal direction. For the plastic lens barrel described in item 13 of the scope of the patent application, the number of the ring-shaped groove structures is Nt, which meets the following conditions: 5

Nt

25. For the plastic lens barrel described in item 1 of the scope of patent application, the groove structures are regularly arranged along a circumferential direction of the optical axis, and regularly arranged along the sagittal direction away from the optical axis; wherein, the In these trench structures, a partition wall is arranged between each two adjacent trench structures, and the partition wall separates the adjacent two trench structures from each other. For the plastic lens barrel described in item 15 of the scope of patent application, the number of groove structures is Ni, which meets the following conditions: 360

Ni

1200. According to the plastic lens barrel described in claim 15, wherein the partition walls include at least one first partition wall arranged along the circumferential direction of the optical axis and at least one partition wall arranged along the sagittal direction away from the optical axis. A second partition wall; wherein the height of the first partition wall along the direction parallel to the optical axis is different from the height of the second partition wall along the direction parallel to the optical axis. For the plastic lens barrel described in item 1 of the scope of patent application, the maximum outer diameter of the groove structure area is φo, and the maximum outer diameter of the plastic lens barrel is φmax, which satisfies the following conditions: 0.2<φo/φmax<0.9 . For the plastic lens barrel described in item 1 of the scope of patent application, the minimum inner diameter of the groove structure area is φi, and the diameter of the object side opening of the plastic lens barrel is φmin, which satisfies the following conditions: 0.75<φmin /φi

1.0. For the plastic lens barrel described in item 1 of the scope of patent application, the depth of each groove structure along the direction parallel to the optical axis is d, which meets the following condition: 0.04mm<d<0.30mm. The plastic lens barrel described in item 1 of the scope of patent application, wherein the length of the groove structure area along the direction perpendicular to the optical axis is T, the length of the groove structure area along the direction parallel to the optical axis is L, and Meet the following conditions: 0.3<L/T

1.5. A camera module includes: the plastic lens barrel and the imaging lens group as described in item 1 of the scope of patent application; and an electronic photosensitive element arranged on an imaging surface of the imaging lens group. An electronic device comprising: the camera module as described in item 22 of the scope of patent application.

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