CN114764173B - Lens barrel, lens, multiple lens groups and camera modules - Google Patents
Lens barrel, lens, multiple lens groups and camera modules Download PDFInfo
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- CN114764173B CN114764173B CN202011641997.0A CN202011641997A CN114764173B CN 114764173 B CN114764173 B CN 114764173B CN 202011641997 A CN202011641997 A CN 202011641997A CN 114764173 B CN114764173 B CN 114764173B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/025—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using glue
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- Optics & Photonics (AREA)
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Abstract
本发明涉及一种镜筒，具有相对的第一端和第二端，所述第一端和所述第二端之间形成空腔，所述镜筒包括遮光部及连接于所述遮光部的透光部，所述空腔由所述遮光部围设形成，所述透光部具有可供外界光线通过的入光面、出光面，所述出光面位于所述第一端，从而使外界光线可以从所述入光面入射并从位于所述第一端的出光面出射。上述的镜筒，可用于组装形成多群组镜头；其具有透光部，在形成多群组镜头时，能够通过光照固化胶水，而不需要长时间烘烤工艺，胶水固化时间可缩短至40秒‑60秒，从而保证镜头品质良率稳定性及生产效率。还提出一种具有上述镜筒的镜头、多群组镜头及摄像模组。
The present invention relates to a lens barrel, which has a first end and a second end opposite to each other, a cavity is formed between the first end and the second end, the lens barrel includes a light shielding portion and a light-transmitting portion connected to the light shielding portion, the cavity is formed by the light shielding portion, the light-transmitting portion has a light-entering surface and a light-emitting surface for external light to pass through, the light-emitting surface is located at the first end, so that external light can be incident from the light-entering surface and emitted from the light-emitting surface located at the first end. The above-mentioned lens barrel can be used to assemble to form a multi-group lens; it has a light-transmitting portion, and when forming a multi-group lens, it can cure glue by light without a long baking process, and the glue curing time can be shortened to 40 seconds to 60 seconds, thereby ensuring the stability of the lens quality yield and production efficiency. A lens, a multi-group lens and a camera module having the above-mentioned lens barrel are also proposed.
Description
Technical Field
The present invention relates to an imaging module, and more particularly to a lens barrel, a lens with the lens barrel, and a multi-group lens.
Background
The lens is an important component of the camera module, and directly affects the imaging quality of the camera module. In the multi-group lens, error compensation is performed on manufacturing tolerances/assembly tolerances and the like of the components of the optical system by utilizing a lens AA (active alignment) process, so that the imaging quality and the mass production yield of the whole optical system are improved.
When the AA technique is adopted, as shown in fig. 1, since the adjacent 2 groups (the first lens 1, the second lens 2) need to be reliably connected together after finding the optimal imaging position. The common technology is to use glue 3 for bonding, namely, thermosetting glue is used for primary dispensing, and then UV glue is used for secondary dispensing. As shown in fig. 2, the first dispensing is performed by using a thermosetting adhesive with air holes 31, and the second dispensing is performed by using a UV adhesive after the thermosetting adhesive is baked and cured to block the air holes 31, so as to ensure adhesion reliability and prevent dust from entering.
The defects of the method include that the lens barrel in the lens is usually a black plastic part, the quality of the lens is easy to be abnormal when the thermosetting adhesive is baked and solidified, and the thermosetting adhesive needs to be provided with an air escape hole, so that secondary dispensing is needed.
Disclosure of Invention
Therefore, it is necessary to provide a multi-group lens for solving the problem that the quality of the lens is abnormal due to baking and curing glue during the assembly of the multi-group lens. An image pickup module having the multi-group lens is also provided. A lens barrel and a lens are also provided.
The lens barrel comprises a shading part and a light transmission part connected with the shading part, wherein the cavity is formed by encircling the shading part, the light transmission part is provided with a light inlet surface and a light outlet surface which can be used for external light to pass through, and the light outlet surface is positioned at the first end, so that external light can enter from the light inlet surface and exit from the light outlet surface positioned at the first end.
The lens barrel can be assembled to form a lens, and then is used for assembling to form a plurality of groups of lenses. The lens is provided with the light-transmitting part, when the multi-group lens is formed, the glue can be cured through illumination without a long-time baking process, and the curing time of the glue can be shortened to 40 seconds-60 seconds or even lower, so that the quality yield stability and the production efficiency of the lens are ensured.
In one embodiment, the lens barrel includes a side wall connecting the first end and the second end, and at least one of the first end, the second end, and the side wall is provided with the light incident surface. The light incident surface can be arranged at the first end or the second end or at the position between the first end and the second end, and the light incident from the light incident surface can be directly irradiated or refracted and then emitted from the light emergent surface and irradiated on the glue, so that the glue is solidified.
In one embodiment, the light incident surface is a rotation surface, and an included angle between a bus of the light incident surface and an axis of the lens barrel is 0-90 degrees. In the above angle range, the light rays entering from the light-in surface can be directly emitted or refracted and then emitted from the light-out surface and irradiated on the glue, so that the glue is solidified.
In one embodiment, the light incident surface and the light emergent surface are respectively disposed at the first end and the second end. The light incident surface and the light emergent surface are positioned on two opposite sides of the lens barrel, light can be emitted to the glue approximately along the axial direction of the lens barrel, and the light emitted to the glue has larger energy, so that the curing time of the glue is shortened.
In one embodiment, the light incident surface is parallel to the light emergent surface, and the light incident surface and the light emergent surface are perpendicular to the axis of the lens barrel. At this time, the light path between the light incident surface and the light emergent surface is parallel to the axis of the lens barrel. Therefore, the light rays can be emitted perpendicular to the light emitting surface and emitted to the glue, and the light energy emitted to the glue is large, so that the curing time of the glue is shortened.
In one embodiment, the lens barrel includes a side wall connecting the first end and the second end, and the light incident surface is disposed on the side wall. The light incident surface can be arranged on the side wall of the lens barrel, and light rays incident from the light incident surface are refracted, then are emitted from the light emergent surface and irradiated on the glue, so that the glue is solidified.
In one embodiment, the light-transmitting portion and the light-shielding portion are nested. The shading part is used for preventing light from entering the hollow part of the lens barrel, and preventing non-imaging light from entering and irradiating the imaging surface, so that stray light can be reduced, and the imaging effect of high quality is ensured.
In one embodiment, the light-transmitting portion surrounds the light-shielding portion and covers at least a portion of the outer circumferential surface of the light-shielding portion. The light-transmitting part surrounds the light-shielding part for a circle, so that the light-transmitting part forms an outer ring of the lens barrel and the light-shielding part forms an inner ring of the lens barrel. When the two lenses are bonded and assembled, the glue is arranged at the outer ring of the lens barrel and at the position between the outer ring of the lens barrel and the second lens, which is close to the edge, so that the glue can be conveniently coated. Meanwhile, the shading part is an inner ring of the lens barrel, and the effect of shading light is good when the lens is imaged.
In one embodiment, the light shielding portion is a hard member, and the light transmitting portion is a flexible member. The outer ring of the lens cone is made of flexible materials and has good hand feeling, and the inner ring of the lens cone is made of hard materials and can support the first lens.
In one embodiment, the light-transmitting part and the light-shielding part are integrated by a double-color injection molding process, or the light-transmitting part is detachably sleeved outside the light-shielding part. The lens barrel of the first lens can directly form the light transmission part by adopting a double-color injection molding process, and light is allowed to pass through, so that glue capable of being solidified by illumination can be used, long-time baking is avoided, the quality of the lens is ensured, and in addition, the injection molding progress is high, thereby being beneficial to improving the production yield of the assembled lens. When shading portion and printing opacity portion also can be through the equipment formation as an organic whole piece, shading portion also can be hard material, and printing opacity portion is flexible material, and printing opacity portion detachably overlaps in the outside of shading portion to obtain the printing opacity portion that allows light to pass through, thereby can use the glue that the accessible illumination was solidified, avoid long-time the toasting, guarantee the quality of camera lens.
In one embodiment, the light shielding portion is a black light shielding portion. The black shading effect is good, and the black is the common color of the lens barrel, which accords with the aesthetic of users.
A lens comprises the lens barrel, wherein a lens is arranged in the lens barrel. The lens can be assembled to form the first lens in the previous embodiment, and then be assembled to form a multi-group lens. Because the lens barrel of the lens is provided with the light-transmitting part, when the lens with multiple groups is formed, the glue can be cured through illumination without a long-time baking process, and the curing time of the glue can be shortened to 40-60 seconds, thereby ensuring the quality yield stability and the production efficiency of the lens.
A multi-group lens comprises a first lens and a second lens which are bonded through glue, wherein the first lens is the lens, and the glue can be cured through illumination. After the glue is arranged between the first lens and the second lens, the glue can be solidified in an illumination mode, so that a long-time baking process is not needed, the glue solidification time can be shortened to 40-60 seconds, and the quality yield stability and the production efficiency of the lenses are ensured.
In one embodiment, the glue is in the shape of a closed loop. In the traditional technology, an air hole needs to be reserved when primary dispensing is baked and solidified, so that secondary dispensing is needed. In the embodiment of the invention, the glue is cured by adopting an illumination mode, the glue can be coated in a closed ring shape without arranging an air escape hole, and correspondingly, secondary dispensing is not needed. Because secondary dispensing is not needed, the working procedures are saved, and the production efficiency is improved.
In one of the embodiments, the glue is evenly coated in its circumferential direction. The glue is uniformly applied in its circumferential direction. For example, the glue may be annular. Because the glue is uniformly coated without the air holes, the circumferential stress is uniform, thereby avoiding the relative position deviation of the first lens and ensuring the relative position precision of the first lens and the second lens.
In one embodiment, the glue is a UV or visible light curable glue. The glue can be selected from UV glue or visible light curing glue, and can be cured through irradiation of visible light, so that a baking process is avoided.
The multi-group lens comprises a first lens and a second lens bonded by glue, wherein the first lens and the second lens respectively comprise a lens barrel, at least one lens barrel comprises a light transmission part which allows preset light to pass through and irradiate the glue, and the glue is cured in a mode of ultraviolet light and/or light irradiation of other wave bands. After the glue is arranged between the first lens and the second lens, the glue can be solidified in an illumination mode, so that a long-time baking process is not needed, the glue solidification time can be shortened to 40-60 seconds, and the quality yield stability and the production efficiency of the lenses are ensured.
A camera module comprises a plurality of groups of lenses. When the lens barrel is manufactured into a plurality of groups of lenses, the lens barrel comprises the light-transmitting part which allows preset light to pass through and irradiate the glue, after the glue is arranged between the first lens and the second lens, the glue can be solidified in an illumination mode, so that a long-time baking process is not needed, the glue solidifying time can be shortened to 40-60 seconds, and the quality yield and stability of the lens are better.
Drawings
Fig. 1 is a schematic cross-sectional view of a multi-group lens in the prior art.
Fig. 2 is a schematic cross-sectional view of the multi-group lens shown in fig. 1 along A-A after one dispensing.
Fig. 3 is a schematic cross-sectional view of a multi-group lens according to an embodiment of the invention.
Fig. 4 is a schematic cross-sectional view of the multi-group lens shown in fig. 3 along the direction B-B after one dispensing.
Fig. 5 is a schematic cross-sectional view of a multi-group lens according to another embodiment of the present invention.
Fig. 6 is a schematic cross-sectional view of a group lens according to another embodiment of the present invention.
The elements in the figures are labeled as follows:
1. First lens, 2, second lens, 3, glue, 31, air escape hole, 100, multi-group lens, 10, first lens, 110, lens barrel, 101, object side end, 102, image side end, 103, side wall, 112, light transmission part, 1121, light incident surface, 1122, light emergent surface, 113, light shielding part, 120, first lens, 20, second lens, 210, second lens, 30, glue;
100', multi-group lens, 10', first lens, 102', image side end, 20, second lens ', 210', second lens, 220', lens barrel, 221', light transmitting part, 2211', light entering surface, 2212', light emitting surface, 222', light shielding part, 30', glue.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected through an intervening medium, or in communication between two elements or in an interaction relationship between two elements, unless otherwise explicitly specified. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
As described in the background art, in the multi-group lens of the conventional technology, after one dispensing, the thermosetting adhesive needs to be cured by a baking process, and the baking time is usually more than 30 minutes and even up to two hours, which easily causes abnormal quality of the lens. In order to solve the above-mentioned problems, embodiments of the present invention provide a multi-group lens, and the multi-group lens of the embodiments of the present invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 3, a schematic cross-sectional view of a multi-group lens 100 is illustrated, in accordance with an embodiment of the present invention. As shown in fig. 3, the multi-group lens 100 includes a first lens 10 and a second lens 20 bonded by a glue 30, wherein the glue 30 is a glue capable of being cured by illumination, and the first lens 10 has a light-transmitting portion 112 for passing light and irradiating the glue 30, and a light-shielding portion 113 connected to the light-transmitting portion 112. In this way, as shown in fig. 4, after the glue 30 is disposed between the first lens 10 and the second lens 20, the glue 30 can be cured by illumination, so that a baking process is not required, and quality, yield, stability and production efficiency of the lens are ensured.
The glue 30 is used to support the first lens 10 and the second lens 20 after curing and to maintain the relative position between them in the relative position determined by active calibration. The glue 30 can be cured by light irradiation, and the specific type is not limited. For example, the glue 30 may be a UV glue which can be cured by irradiation of UV light, or for example, the glue 30 may be a glue 30 which is cured by light of other wavelength bands, such as a visible light curing glue which can be cured by irradiation of visible light.
The light-transmitting portion 112 may be capable of transmitting light, and has a certain light transmittance, that is, the light-transmitting portion 112 does not need to have 100% light transmittance. Preferably, the light transmitting portion 112 may be provided as a fully transparent portion, a translucent portion, or the like.
For convenience of understanding, in the embodiment of the present application, the multi-group lens 100 including the upper and lower lenses is described as an example, but it should be understood that the multi-group lens 100 of the present application is not limited to having only the upper and lower lenses, but may have more than two lenses. As long as one of the adjacent two lenses has the above-described light-transmitting portion 112.
As shown in fig. 3, the first lens 10 includes a barrel 110 and a first lens 120 disposed in the barrel 110. The lens barrel 110 has a hollow structure with two open ends, and has a first end and a second end opposite to each other, and a cavity is formed between the first end and the second end, wherein the light shielding portion 113 encloses the cavity, and the first lens 120 is installed in the cavity. Specifically, the first end is an object side end 101, and the second end is an image side end 102. In the embodiment of the invention, the object side refers to the side of the lens, which is close to the object in use. The image side refers to the side of the lens far away from the object and close to the imaging surface when in use. In the present embodiment, the number of the first lenses 120 is one, but it should be noted that the embodiment of the invention is not limited thereto, and the number of the first lenses 120 may be plural. The second lens 20 includes one or more second lenses 210, and the second lenses 210 and the first lenses 120 together form an imageable optical system.
The lens barrel 110 of the first lens 10 includes a light-transmitting portion 112, the light-transmitting portion 112 has a light-incident surface 1121 into which a predetermined light beam can enter, a light-emitting surface 1122, and the light-emitting surface 1122 is located at the image side end 102. As shown in fig. 3, the external light L enters the light entrance surface 1121 and then exits from the image side end 102. Since the glue 30 is located between the image side end 102 of the first lens 10 and the object side end 101 of the second lens 20, the external light can be irradiated on the glue 30 through the light-transmitting portion 112. When the glue 30 is specifically applied, the glue 30 may be applied on the light-emitting surface 1122, and then the first lens 10 is abutted against the second lens 20, or the glue 30 may be applied on the second lens 20 at a position corresponding to the light-emitting surface 1122, and then the first lens 10 is abutted against the second lens 20.
In the multi-group lens 100, after the glue 30 is disposed between the first lens 10 and the second lens 20, the glue 30 can be cured by illumination, so that a long-time baking process is not required, the curing time of the glue 30 can be shortened to 40-60 seconds, and the quality yield stability and the production efficiency of the lens are ensured.
The specific position of the light incident surface 1121 is not limited, and light may be incident on and emitted to the light emitting surface 1122. In an example, the light incident surface 1121 is located at the object side end 101 of the lens barrel 110, and the light incident surface 1121 is parallel to the light emitting surface 1122 and perpendicular to the axis X of the lens barrel 110. At this time, the optical path between the light incident surface 1121 and the light emergent surface 1122 is parallel to the axis X of the lens barrel 110. Thus, the light can be emitted perpendicular to the light emitting surface 1122 and emitted to the glue 30, and the light emitted to the glue 30 can be larger, which is beneficial to shortening the curing time of the glue 30.
It can be understood that the light incident surface 1121 may also be disposed at a position between the object side end 101 and the image side end 102 of the lens barrel 110. Specifically, the lens barrel 110 includes a sidewall 103 connecting the first end and the second end, and the light incident surface 1121 is disposed on the sidewall 103. For example, the lens barrel 110 is generally cylindrical, and the light incident surface 1121 may be formed on a cylindrical side surface of the lens barrel 110, where an optical path between the light incident surface 1121 and the light emergent surface 1122 forms an acute angle with an axis of the lens barrel 110.
The light incident surface 1121 may be formed at the object side end 101 of the lens barrel 110. Namely, the light incident surface 1121 and the light emergent surface 1122 are located at the same end of the lens barrel 10. The light incident from the light incident surface 1121 may be refracted and then emitted from the light emitting surface 1122.
Further, in the above-mentioned modes of setting the different positions of the light incident surface 1121, the light incident surface 1121 is a rotation surface formed by rotating a line segment around the axis of the lens barrel 110. The light incident surface 1121 may be provided at various angles. In a specific arrangement, the included angle between the light incident surface 1121, i.e. the generatrix of the rotation surface, and the axis X of the lens barrel 110 may be in the range of 0-90 degrees. More specifically, as shown in fig. 3, when the included angle between the generatrix M of the light incident surface 1121 and the axis of the lens barrel 110 is 0 degrees, the generatrix M of the light incident surface 1121 is parallel to the axis of the lens barrel 110, and the light incident surface 1121 extends along the axis of the lens barrel 110. As shown in fig. 5, when the included angle between the generatrix of the light incident surface 1121 and the axis of the lens barrel 110 is 90 degrees, the light incident surface 1121 extends in a direction perpendicular to the axis of the lens barrel 110, and the light incident surface 1121 is disposed at the object side end 101.
In addition, the light incident surface 1121 may be disposed at the same time at the object side end 101 of the lens barrel 110 and at a position between the object side end 101 and the image side end 102 of the lens barrel 110. Thus, the accuracy of the light source position is required to be relatively low in illumination, but the illumination on the glue 30 can be ensured.
The light incident surface 1121 is not limited to a surface of revolution, and may be an irregular surface or a part of a surface of revolution.
In an embodiment, the lens barrel 110 further includes a light shielding portion 113 fixedly connected to the light transmitting portion 112, and the light transmitting portion 112 and the light shielding portion 113 are nested. The light shielding part 113 does not allow light to pass through, can shield light during imaging of the lens, and ensures imaging effect, so that the lens barrel 110 does not need to be assembled with a light shielding element. The light shielding portion 113 is specifically a black light shielding portion 113. The black shading effect is good, and the black is the common color of the lens barrel in the lens, which accords with the aesthetic of users. The nesting arrangement includes both the case where the light-transmitting portion 112 and the light-shielding portion 113 are integrally molded or separately molded.
Further, the light-transmitting portion 112 surrounds the light-shielding portion 113 and completely covers the outer circumferential surface of the light-shielding portion 113. As shown in fig. 3, the light-transmitting portion 112 surrounds the light-shielding portion 113 for one circle, which means that the light-transmitting portion 112 is sleeved outside the light-shielding portion 113, so that the light-transmitting portion 112 forms an outer ring of the lens barrel 110 and the light-shielding portion 113 forms an inner ring of the lens barrel 110. The glue 30 is disposed between the outer ring of the lens barrel 110 and the second lens 20 near the edge, so that the glue 30 is more convenient to apply. Meanwhile, the light shielding portion 113 is an inner ring of the lens barrel 110, and has a good effect of shielding light during imaging of the lens.
In another embodiment, as shown in fig. 5, the light-transmitting portion 112 surrounds the light-shielding portion 113, but only covers a part of the outer circumferential surface of the light-shielding portion 113. Specifically, along the axis of the lens barrel 110, the light shielding portion 113 includes a large diameter portion and a small diameter portion, the outer diameter of the large diameter portion being larger than the outer diameter of the small diameter portion, so that the outer circumferential surface of the light shielding portion 113 is stepped, and the light transmitting portion 112 is coated on the small diameter portion of the light shielding portion 113. Thus, the outer circumferential surface of the light transmitting portion 112 and the outer circumferential surface of the large diameter portion of the light shielding portion 113 together form the side wall 103 of the lens barrel 110. At this time, the light-transmitting portion 112 is only disposed at the image side end 102, and the light-transmitting portion 112 does not extend to the object side end 101. At this time, the light incident surface 1121 is provided on the outer circumferential surface of the light transmitting portion 112.
Further, the light shielding portion 113 is a hard member made of a hard material, and the light transmitting portion 112 is a hard member made of a soft material. The outer ring of the lens barrel 110 is made of flexible materials, the hand feeling is good, and the inner ring of the lens barrel 110 is made of hard materials, so that the first lens 120 can be well supported. In an example, the light shielding portion 113 is black hard plastic, and the light transmitting portion 112 is transparent silica gel.
The manner in which the lens barrel 110 forms the light-transmitting portion 112 and the light-shielding portion 113 is not limited. In a preferred embodiment, the light shielding portion 113 and the light transmitting portion 112 are an integral piece formed by a two-color injection molding process. That is, the light shielding portion 113 and the light transmitting portion 112 are simultaneously formed by a two-shot molding process. The double-shot molding process is a molding process in which two different materials are injected into the same set of mold, so that the injection molded part is formed by the two materials. The two different materials here are mainly referred to as different colors. In one example, the light shielding portion 113 is a black opaque material, and the light transmitting portion 112 is a colorless transparent material. The two different materials here also include the case where the light shielding portion 113 and the light transmitting portion 112 are different in color and different in material. In an example, the light shielding portion 113 is black hard plastic, and the light transmitting portion 112 is transparent silica gel.
In the multi-group lens 100, the lens of the first lens 10 adopts a bi-color injection molding process to form the light-transmitting portion 112, which allows light to transmit, so that the glue 30 cured by illumination can be used, long-time baking is avoided, and the quality of the lens is ensured.
In another embodiment, the light shielding portion 113 and the light transmitting portion 112 may be formed as a single piece by assembly. That is, the light transmitting portion 112 and the light shielding portion 113 are separate two portions, and are assembled together to form the complete lens barrel 110, wherein the light transmitting portion 112 is sleeved outside the light shielding portion 113, and interference fit is achieved between the light transmitting portion and the light shielding portion.
Further, when the light shielding portion 113 and the light transmitting portion 112 may be formed as a single piece by assembling, the light shielding portion 113 may be made of a hard material, the light transmitting portion 112 may be made of a flexible material, and the light transmitting portion 112 may be detachably sleeved outside the light shielding portion 113. The light-transmitting portion 112 is flexible, so that it can be conveniently sleeved outside the light-shielding portion 113, and assembly is convenient. In addition, the outer ring of the lens barrel 110 is made of flexible materials, and has good hand feeling.
In another embodiment, the light shielding portion 113 and the light transmitting portion 112 may be formed as a single piece by assembly. That is, the light transmitting portion 112 and the light shielding portion 113 are separate two portions, which are assembled together to form the complete lens barrel 110, wherein the light transmitting portion 112 is gap-sleeved outside the light shielding portion 113 with a filler such as an adhesive therebetween.
In still another aspect, the light-transmitting portion 112 is embedded within the light-shielding portion 113. When the lens barrel 110 is manufactured by a bicolor injection molding process, the annular light-transmitting part 112 is formed, the light-shielding part 113 is formed inside and outside the inner ring of the annular light-transmitting part 112, and the light-shielding part 113 in the inner ring of the light-transmitting part 112 forms a cavity of the lens barrel 110. Preferably, the glue 30 is arranged in a closed loop shape, and secondary dispensing is not required. Here, the closed ring shape means that the glue 30 is continuously disposed along a circumferential direction around the axis of the lens barrel 110 to form an end-to-end closed structure. The circumferential direction around the axis of the lens barrel 110 is defined as the circumferential direction of the glue 30. The specific arrangement of the closed loop is not limited, and may be, for example, a circular loop as shown in fig. 4, and is continuously arranged along the circumferential direction of the glue 30. The closed ring may be square ring or any polygonal ring.
In the traditional technology, an air hole needs to be reserved when primary dispensing is baked and solidified, so that secondary dispensing is needed. In the embodiment of the present invention, the glue 30 is cured by adopting an illumination mode, so as shown in fig. 4, the glue 30 can be coated in a closed ring shape, so that no air vent is required to be arranged, and accordingly, secondary dispensing for the air vent is also not required. Because secondary dispensing is not needed, the working procedures are saved, and the production efficiency is improved.
Further, the glue 30 is uniformly applied in the circumferential direction thereof. For example, the glue 30 is in a ring shape, and because the glue 30 is uniformly coated without ventilation holes, the first lens 10 and the second lens 20 are uniformly stressed in the circumferential direction, so that the relative position offset of the first lens 10 and the second lens 20 is avoided, and the relative position accuracy of the first lens and the second lens is ensured.
In addition, in the embodiment of the invention, the glue 30 is cured by adopting an illumination mode, so that the fault tolerance rate of the glue dispensing mode when the glue 30 is coated is high. Specifically, even if the glue 30 is accidentally coated with air escape holes. After the glue 30 is cured by adopting the illumination mode, glue can be supplemented by adopting a secondary glue dispensing mode, such as glue supplementing by utilizing thermosetting glue or UV glue. However, because the glue supplementing amount is small, even if the baking technology is adopted to solidify the glue supplementing, the influence on the quality of the lens is relatively low.
As shown in fig. 6, in a multi-group lens 100' according to another embodiment of the present invention, a first lens 10' and a second lens 20' are bonded by a glue 30', wherein the glue 30' is a glue that can be cured by light.
In the present embodiment, the second lens 20 'includes a second lens 210', a lens barrel 220', and the lens barrel 220' has a light-transmitting portion 221 'for passing light and irradiating the glue 30'. The lens barrel 220 has a hollow structure with two open ends, and has a first end and a second end, wherein the first end is an object side end close to the first lens 10'.
The light transmitting portion 221' is disposed at a side of the lens barrel 220' near the first lens 10 '. The light entrance surface 2211' of the light transmitting portion 221' is disposed between the object side end and the image side end of the lens barrel 220 '. The object side end of the lens barrel 220 'is an end close to the image side end 102 of the first lens 10'. The included angle between the generatrix M of the light incident surface 2211 'and the axis X of the lens barrel 220' is an acute angle. The light L entering from the light entrance surface 2211' can be emitted from the object side end of the lens barrel 220' and irradiated to the glue 30'. The light-emitting surface 2212' of the light-transmitting portion 221' is disposed at a first end, i.e., an object side end, of the first lens 10 '.
The second lens 20' further includes a light shielding portion 222' connected to the light transmitting portion 221', wherein the light transmitting portion 221' covers a portion of the outer circumferential surface of the light shielding portion 222', similar to the embodiment shown in fig. 5. Of course, in other embodiments, the light-transmitting portion 221' of the second lens 20' covers the entire outer circumference of the light-shielding portion 222', that is, the light-transmitting portion 221' of the second lens 20' may be disposed in the same manner as the light-transmitting portion 112 of the first lens 10 in the embodiment shown in fig. 3.
Further, in the present embodiment, the light transmitting portion 221 'and the light shielding portion 222' may be formed as a single piece by a two-shot molding process, or may be formed as a single piece by an assembling method.
Further, the structure of the first lens 10' may be exactly the same as that of the first lens 10 on the basis of providing the light transmitting portion 221' on the second lens 20 '. That is, at this time, the first lens 10 'and the second lens 20' are respectively provided with light transmitting portions. When the glue 30' is cured, the selection of the injection direction of the light rays L is more and more flexible.
An embodiment of the present invention also proposes a lens barrel 110, which is a lens barrel 110 of the first lens 10 or a lens barrel 220' of the second lens 20' of the multi-group lenses 100 or 100' in the foregoing embodiments. The lens described above may be used to assemble and form the first lens 10 or the second lens 20' in the foregoing embodiments, and further used to assemble and form a multi-group lens. The lens barrel is provided with the light-transmitting part, when a plurality of groups of lenses are formed, the glue can be cured through illumination without a long-time baking process, and the curing time of the glue 30 can be shortened to 40-60 seconds, so that the quality yield stability and the production efficiency of the lenses are ensured.
An embodiment of the present invention also provides a lens, which is the first lens 10 or the second lens 20' in the multi-group lens 100 in the foregoing embodiment. The lens and other lenses form a multi-group lens, and when the multi-group lens is formed, the glue can be cured through illumination without a long-time baking process.
An embodiment of the invention further provides an image capturing module, which includes the multi-group lens 100 or the multi-group lens 100' of the foregoing embodiments. Taking the manufacturing of the multi-group lens 100 as an example, since the lens barrel 110 of the first lens 10 includes the light-transmitting portion 112 that allows the predetermined light to pass through and irradiate the glue 30, after the glue 30 is disposed between the first lens 10 and the second lens 20, the glue 30 can be cured by illumination, so that a long-time baking process is not required, the curing time of the glue 30 can be shortened to 40 seconds to 60 seconds, and the quality and yield stability of the lens are better.
When the multi-group lens 100 is used to manufacture an image capturing module, at least one lens component is first connected to a motor, and the other lens components are then attached and actively aligned with the photosensitive assembly. For example, the second lens 20 of the multi-group lens 100 is first connected to the motor, then the first lens 10 is mounted on the second lens 20 that is already fixedly connected to the motor, and the glue 30 between the first lens 10 and the second lens 20 is cured by illumination. For example, for a threaded motor, the second lens 20 component may be threaded into the motor, and after set high, a UV glue spot is used between the lens and the motor carrier, thereby dispensing and securing between the second lens 20 and the motor carrier. For a screw-less motor, the second lens 20 and the motor carrier can be connected by glue 30. It should be understood that the manner of connection between the second lens 20 and the motor carrier is not limited thereto. The manner of manufacturing the multi-group lens 100' is similar and will not be described in detail.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (18)
1. The lens barrel comprises a shading part and a light-transmitting part connected with the shading part, the shading part is formed by encircling the shading part, the light-transmitting part is arranged around the optical axis of the first lens or the second lens, at least part of the shading part is coated on the light-transmitting part along the radial direction of the lens barrel, the light-transmitting part is provided with a light-in surface and a light-out surface which can be used for the outside light to pass through, and the light-out surface is positioned at the second end, so that the outside light can be incident from the light-in surface and emitted from the light-out surface positioned at the second end and irradiated to the glue to solidify the glue.
2. The multi-group lens of claim 1, wherein the lens barrel comprises a sidewall connecting the first end and the second end, at least one of the first end, the second end, and the sidewall having the light incident surface.
3. The multi-group lens of claim 1, wherein the light incident surface is a rotation surface, and an included angle between a generatrix of the light incident surface and an axis of the lens barrel is 0-90 degrees.
4. The multi-group lens of claim 3, wherein the light incident surface and the light emergent surface are disposed at the first end and the second end, respectively.
5. The multi-group lens of claim 4, wherein the light entrance surface is parallel to the light exit surface, and the light entrance surface and the light exit surface are perpendicular to an axis of the lens barrel.
6. The multi-group lens of claim 3, wherein the barrel comprises a sidewall connecting the first end and the second end, and the light incident surface is disposed on the sidewall.
7. The multi-group lens of claim 1, wherein the light-transmitting portion is nested with the light-shielding portion.
8. The multi-group lens as claimed in claim 7, wherein the light-transmitting portion surrounds the light-shielding portion and covers at least a portion of an outer circumferential surface of the light-shielding portion.
9. The multi-group lens of claim 7, wherein the light-transmitting portion and the light-shielding portion are an integral piece formed by a two-shot molding process.
10. The multi-group lens is characterized by comprising a first lens and a second lens which are bonded through glue, wherein the first lens and the second lens respectively comprise a lens barrel, at least one lens barrel comprises a light transmission part which allows preset light to pass through and irradiate the glue and a shading part connected with the light transmission part, a cavity is formed by surrounding the shading part, and the mode of curing the glue comprises light irradiation of ultraviolet light.
11. The multi-group lens of claim 10, wherein the barrel is a hollow structure with two ends open, having opposite first and second ends, the first and second ends defining a cavity therebetween;
The light-transmitting part is provided with a light-in surface and a light-out surface which can be used for passing external light, and the light-out surface is positioned at the second end, so that the external light can enter from the light-in surface and exit from the light-out surface positioned at the second end and irradiate to the glue so as to solidify the glue;
the lens barrel further comprises a side wall connected with the first end and the second end, and at least one of the first end, the second end and the side wall is provided with the light incident surface.
12. The multi-group lens of claim 11, wherein the light incident surface is a rotation surface, and an included angle between a generatrix of the light incident surface and an axis of the lens barrel is 0-90 degrees.
13. The multi-group lens of claim 11, wherein the light incident surface and the light emergent surface are disposed at the first end and the second end, respectively.
14. The multi-group lens of claim 11, wherein the light entrance surface is parallel to the light exit surface, and the light entrance surface and the light exit surface are perpendicular to an axis of the lens barrel.
15. The multi-group lens of claim 10, wherein the light-transmitting portion is nested with the light-shielding portion.
16. The multi-group lens of claim 15, wherein the light-transmitting portion surrounds the light-shielding portion and covers at least a portion of an outer circumferential surface of the light-shielding portion.
17. The multi-group lens of claim 10, wherein the light-transmitting portion and the light-shielding portion are an integral piece formed by a two-shot molding process.
18. An imaging module comprising a multi-group lens as claimed in any one of claims 1 to 17.
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| CN214311048U (en) * | 2020-12-31 | 2021-09-28 | 江西晶超光学有限公司 | Lens barrels, lenses, multi-group lenses and camera modules |
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