TW201918739A - Lens and method for manufacturing the same - Google Patents

Abstract

A lens having an image-magnifying side and an image-demagnifying side. The lens includes a barrel and a lens group. The lens group includes at least three lenses, and the two lenses of the lens group are disposed in the barrel. The first lens from the image-demagnifying side to the image-magnifying side has an outer diameter larger than the inner diameter of the the barrel at the image-demagnifying side.

Description

Lens and its manufacturing method

The present invention relates to an optical component and a method of fabricating the same, and more particularly to a lens and a method of fabricating the same.

Today's mobile devices, such as smart phones and tablets, are mostly equipped with a Compact Camera Module (CCM) to enable the mobile device to have photo and photography functions. However, in the existing miniature camera module design, a plurality of lenses of different sizes need to be arranged inside the barrel. In order to allow a large-sized lens to be placed inside the lens barrel, the thickness of the tail end of the lens barrel is usually too thin, so that a large-sized lens can enter the lens barrel, but this causes difficulty in injection molding and is prone to a short shot. The quality of the lens barrel and the poor stability.

Secondly, the existing miniature camera modules mostly use a pressure ring to fix a plurality of lenses in the lens barrel. The pressure ring is usually mounted at the rear end of the lens barrel. However, since the thickness of the tail end of the lens barrel is thin, the end of the lens barrel is easily deformed by the pressing of the pressure ring, thereby reducing the image quality of the lens. In addition, the tail end of the lens barrel is close to an image sensor, such as a Charge-Coupled Device (CCD) or a CMOS image sensor, so the pressure at the tail end The ring may touch the image sensor, causing damage to the image sensor.

Furthermore, the pressure ring is usually matched with a glue to hold the lenses. Generally, the glue is filled from the lens barrel at the interface between the pressure ring and the lens barrel so that the pressure ring can be fixed in the lens barrel to fix the lenses in the lens barrel. However, the internal space of the above-mentioned lens barrel is narrow, so that in the process of dispensing, the rubber material is likely to overflow, and the lens may be contaminated with the glue material, thereby reducing the image quality of the lens.

An embodiment of the invention provides a lens provided with an image magnification side and an image reduction side. The lens contains a lens barrel and a lens group. The lens group includes at least three lenses, and the two lenses of the lens group are disposed in the lens barrel, and the outer diameter of the first lens of the lens group from the image reduction side to the image magnification side is larger than the lens barrel on the image reduction side. The inner diameter.

An embodiment of the invention provides a lens including a first side, a second side, a lens barrel, and a plurality of lenses. When the light enters the lens from the first side, an image forming surface for reducing the image may be formed in the second side direction. Part of the plurality of lenses are disposed in the lens barrel, and the plurality of lenses, the first lens calculated by the second side of the lens, is close to the outer surface of the lens of the image plane of the reduced image, near the outer edge of the first lens The portion has a flat surface, and the plane is disposed between the image-receiving surface of the reduced image and the lens barrel.

An embodiment of the invention provides a lens provided with an image magnification side and an image reduction side. The lens contains a lens barrel, a lens group, and a glue. The lens barrel is provided with a first outer surface adjacent to the reduced side of the image. The lens group includes a plurality of lenses, and a part of the plurality of lenses are disposed in the lens barrel. The lens closest to the image reduction side of the lens group is provided with a second outer surface. The adhesive is disposed between the first outer surface and the second outer surface.

An embodiment of the present invention provides a method of manufacturing a lens, wherein the lens is provided with an image magnification side and an image reduction side, and the manufacturing method includes providing a lens barrel. Thereafter, the first lens and the second lens are mounted in the lens barrel. The third lens is fixed on the lens barrel by an adhesive, wherein the third lens is fixed to the outer edge of the lens barrel with an adhesive, and the outer diameter of the third lens is larger than the inner diameter of the end of the third lens fixed by the lens barrel. At the same time, the third lens is closer to the image reduction side than the second lens.

Since the embodiment of the present invention uses a lens having an outer diameter larger than the inner diameter of the lens barrel to be bonded to the lens barrel, the lens barrel does not need to be designed to have a thin flesh thickness to accommodate a lens having a larger size. Compared with the conventional lens barrel, the lens barrel disclosed in the embodiment of the present invention can avoid the occurrence of short shot during the injection molding process, thereby improving the forming quality and stability of the lens barrel, and further eliminating the pressure. Ring to reduce material costs. In addition, in the embodiment of the invention, the adhesive is disposed between the first outer surface of the lens barrel and the second outer surface of the lens, so that the adhesive is filled from the outside of the lens to avoid contamination of the light incident surface and the light exit surface of the lens. Go to the glue to improve the image quality of the lens.

In order to make the features of the present invention clear and obvious, the preferred embodiments will be described in detail below.

Referring to FIG. 1, lens 100 includes lens group 110, and lens group 110 includes a plurality of lenses, such as at least three lenses. Taking FIG. 1 as an example, the lens group 110 has an optical axis A1 and includes three lenses 111 and one lens 112, but the invention is not limited thereto. The lens 100 further includes a lens barrel 120, and the lens barrel 120 can accommodate the lenses 111, wherein at least two lenses 111 of the lens group 110 can be disposed in the lens barrel 120. In FIG. 1, the three lenses 111 of the lens group 110 are disposed in the lens barrel 120, and the lens 112 is disposed outside the lens barrel 120, but the invention is not limited thereto. It can be seen that a part of the plurality of lenses (for example, the lens 111) are disposed in the lens barrel 120.

These lenses 111 and 112 are all arranged along the optical axis A1 and stacked on each other. The front end (left end) of the lens barrel 120 has an abutting portion 122, and these lenses 111 are sequentially loaded into the lens barrel 120 from the rear end (right end) of the lens barrel 120, wherein the leftmost lens 111 abuts against the abutting portion 122, to prevent the lens 111 from falling off the lens barrel 120. In the present embodiment, the optical axis A1 passes through the centers of these lenses 111 and 112. The lens 100 is provided with the image magnification side OS and the image reduction side IS by the lenses 111 and 112 of the lens group 110, and includes a first side S11 and a second side S12. When the light enters the lens 100 from the first side S11, the image forming surface S1 of the reduced image may be formed in the direction of the second side S12, wherein an image sensor (not shown) may be disposed at the imaging surface S1 to receive the lens 100. Captured image.

The first lens lens of the lens group 110 from the image reduction side IS to the image magnification side OS is the lens 112, which is also the first lens of the plurality of lenses 111 and 112 counted by the second side S12 of the lens 100. The outer diameter R2 of the lens 112 is larger than the inner diameter R1 of the lens barrel 120 on the image reducing side IS, wherein the inner diameter R1 is also equal to the inner diameter of the end of the fixed lens 112 of the lens barrel 120, so the inner diameter R1 substantially corresponds to the inside of the lens barrel 120. The outer diameter of the lens 111. Therefore, the size of the lens 112 may be larger than the size of the lens 111 disposed in the lens barrel 120, and the lens 112 will abut against the tail end (right end) of the lens barrel 120 near the image reduction side IS, and will not enter the inside of the lens barrel 120. .

The lens 112 is adjacent to the lens surface of the image-receiving surface S1 of the reduced image, and a portion 112p is disposed near the outer edge of the lens 112, and is disposed between the image-receiving surface S1 of the reduced image and the lens barrel 120, wherein the plane 112p can be used as Measure the bearing plane for image sensor measurement. The lens 100 further includes at least one spacer 132 disposed between adjacent lenses of the lens group 110. Taking FIG. 1 as an example, the lens 100 includes a plurality of spacers 132, and at least one spacer 132 is disposed between adjacent two lenses 111 and between adjacent lenses 111 and 112, but the invention is not limited thereto. .

Further, the lens barrel 120 is further provided with a first outer surface 121 close to the image reducing side IS, and the lens 112 closest to the image reducing side IS of the lens group 110 is provided with a second outer surface 112s. The lens 100 further includes an adhesive 140 disposed between the first outer surface 121 and the second outer surface 112s, wherein the groove D1 is formed between the first outer surface 121 and the second outer surface 112s, and the adhesive 140 is disposed on the The inside of the groove D1, but the invention is not limited thereto. The lens 112 is firmly bonded to the lens barrel 120 by the adhesive 140. In addition, the outer surface of the lens barrel 120 is provided with a thread 131 adjacent to the first outer surface 121, and the thread 131 allows the lens 100 to be mounted in an electronic product such as a smart phone or a computer, but the invention is not limited thereto.

2A to 2B are schematic views showing a method of manufacturing the lens of Fig. 1. Referring to FIG. 2A, the manufacturing method of the lens 100 includes the following steps, but the invention is not limited thereto. In the manufacturing method of the lens 100, first, the lens barrel 120 is provided. Next, the first lens and the second lens are mounted in the lens barrel 120, wherein the first lens and the second lens are both the lens 111. These lenses 111 are arranged along the optical axis A1, and enter the lens barrel 120 from the tail end (right end) of the lens barrel 120, and move to the left until the leftmost lens 111 abuts against the abutting portion 122. In FIG. 2A, the lens group 110 has three lenses 111 disposed in the lens barrel 120. Therefore, after the first lens 111 and the second lens 111 are mounted, one lens 111 can be mounted, but the present invention does not limit. In addition, in the process of mounting the lenses 111, a plurality of spacers 132 may be mounted between the first lens 111, the second lens 111, and the third lens 111, but the invention is not limited thereto.

Referring to FIG. 1 and FIG. 2B , the third lens is fixed on the lens barrel 120 with the adhesive 140 , wherein the third lens is the lens 112 . The adhesive 140 is filled between the first outer surface 121 and the second outer surface 112s to enable the adhesive 140 to be coupled to the lens barrel 120 and the lens 112. Thus, the lens 112 is fixed to the outer edge of the rear end of the lens barrel 120 with the adhesive 140, and the lens 112 (third lens) is closer to the image reduction side IS than the lens 111 (second lens) adjacent thereto. Further, in the process of fixing the lens 112 on the lens barrel 120, at least one spacer 132 may be mounted between the lens 112 (third lens) and the lens 111 (second lens) adjacent thereto. Taking this embodiment as an example, two different sizes of spacers 132 may be mounted between adjacent lenses 112 and 111, but the invention is not limited thereto.

Please refer to FIG. 3 , which illustrates a lens 200 according to another embodiment of the present invention, which is similar to the lens 100. The differences between the lenses 200 and 100 will be described below, and the same portions will not be repeatedly described.

In the lens 200, the outer surface of the lens barrel 220 has no thread, but the lens group 210 having the optical axis A2 is the first lens 212 from the image reduction side IS to the image magnification side OS (also the second lens from the lens 200). The edge of the first lens counted by side S22 is provided with a thread 212. Next, the lens 212 has a plane 212p and a connection plane 212s, wherein the plane 212p and the connection plane 212s are opposed to each other, and the tail end (right end) of the barrel 220 has an abutment plane 221. The connecting plane 212s of the lens 212 abuts against the abutting surface 221 of the lens barrel 220, and an adhesive (for example, the adhesive 140, not shown in FIG. 3) may be disposed between the abutting plane 221 and the connecting plane 212s, and filled in. The gap between the plane 221 and the connecting plane 212s is fixed, thereby firmly bonding the lens 212 and the lens barrel 220.

In summary, the embodiment of the present invention uses a large-sized lens having an outer diameter larger than the inner diameter of the lens barrel to be bonded to the tail end of the lens barrel, so that the lens barrel does not need to be designed with a thin flesh thickness to accommodate a large-sized lens. Compared with the conventional lens barrel, the lens barrel disclosed in the embodiment of the present invention can avoid the occurrence of short shot during the injection molding process, thereby improving the molding quality and stability of the lens barrel. Second, the lens that is bonded to the trailing end can abut the lens adjacent thereto to secure the plurality of lenses in the barrel. Compared with the conventional lens, the lens of the embodiment of the present invention can eliminate the pressure ring to reduce the material cost. Furthermore, in the embodiment of the present invention, the adhesive is disposed on the outer surface of the lens barrel (for example, the first outer surface 121). Between the outer surface of the large-sized lens (the second outer surface 112s), the glue is filled from the outside of the lens. Compared with the inner dispensing method adopted by the conventional lens, the embodiment of the present invention can avoid the contamination of the light-incident surface and the light-emitting surface of the lens to prevent the damage of the lens, thereby improving the imaging quality of the lens.

While the present invention has been described above in terms of the preferred embodiments, the present invention is not intended to limit the scope of the present invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100, 200‧‧‧ lens

110, 210‧‧‧ lens group

111, 112, 212‧ ‧ lens

112p, 212p‧‧‧ plane

120, 220‧‧‧ lens barrel

121‧‧‧First outer surface

112s‧‧‧Second outer surface

122‧‧‧Abutment

132‧‧‧shims

131, 212‧‧ threads

140‧‧‧Viscos

212s‧‧‧ connection plane

221‧‧‧Abutment plane

A1, A2‧‧‧ optical axis

D1‧‧‧ groove

IS‧‧‧Image reduction side

OS‧‧‧ image magnification side

R1‧‧‧ inside diameter

R2‧‧‧ OD

S1‧‧‧ imaging surface

S11‧‧‧ first side

S12, S22‧‧‧ second side

1 is a cross-sectional view of a lens according to an embodiment of the present invention. 2A and 2B are schematic views showing a method of manufacturing the lens of FIG. 1. 3 is a cross-sectional view of a lens according to another embodiment of the present invention.

Claims (10)

A lens having an image magnifying side and an image reducing side, the lens comprising: a lens barrel; and a lens group including at least three lenses, wherein the two lenses of the lens group are disposed in the lens barrel And an outer diameter of the first lens that is counted by the image reduction side to the image enlargement side is larger than an inner diameter of the lens barrel on the image reduction side. The lens of claim 1, wherein a portion of the outer edge of the first lens is provided with a flat surface. A lens includes: a first side and a second side, when light enters the lens from the first side, a reduced image forming surface can be formed in the second side direction; a lens barrel; and a plurality of pieces a lens, wherein a part of the plurality of lenses are disposed in the lens barrel, and a plurality of lenses of the plurality of lenses are calculated on a lens surface of the image-receiving surface of the reduced image A plane is disposed adjacent to an outer edge of the first lens, and the plane is disposed between the image forming surface of the reduced image and the lens barrel. The lens of any of 2, 3, wherein the edge of the first lens is provided with a thread. The lens of any of the preceding claims, wherein the outer surface of the lens barrel is provided with a thread. A lens having an image magnifying side and an image reducing side, the lens comprising: a lens barrel having a first outer surface adjacent to the image reducing side; a lens group including a plurality of lenses, the plurality of the plurality The lens is disposed in the lens barrel, a lens of the lens group closest to the image reduction side is provided with a second outer surface, and an adhesive is disposed between the first outer surface and the second outer surface. The lens of claim 6, wherein a groove is formed between the first outer surface and the second outer surface, and the adhesive is disposed in the groove. The lens of any of 2, 6, 7, or 7, further comprising at least one spacer disposed between adjacent ones of the lens groups. A lens manufacturing method, the lens is provided with an image magnifying side and an image reducing side, comprising: providing a lens barrel; installing a first lens and a second lens in the lens barrel; fixing a third with a glue a lens is mounted on the lens barrel; wherein the third lens is fixed to the outer edge of the lens barrel by the adhesive, and an outer diameter of the third lens is larger than an inner diameter of the lens barrel fixing one end of the third lens. At the same time, the third lens is closer to the image reduction side than the second lens. The method of manufacturing the lens of claim 9, further comprising: mounting a plurality of spacers between the first lens, the second lens, and the third lens.