TW201913157A - Optical lens - Google Patents

Abstract

An optical lens comprises a first barrel, a second barrel, a first lens group, and a second lens group. The second barrel is at least partially disposed in the first barrel. The first lens group at least comprises two lenses disposed in the first barrel, wherein a lens of the first lens group is fixed to the first barrel by is hot-melt fixation. The second lens group at least comprises two lenses disposed in the second barrel.

Description

Optical lens

The present invention relates to an optical lens, and more particularly to a vehicle lens.

At present, the lens for the vehicle is made by injection molding, and is integrally formed, so the tolerance of the lens barrel is high, and the injection molding is required to use the split sub-mold, so the coaxiality and tolerance Precision control is also required, otherwise it is difficult to maintain certain accuracy and stability. In addition, the lenses mounted on the lens barrel are fixed using a glue. However, the interior environment of the vehicle lens often becomes a harsh high temperature environment due to the sun exposure, so that the rubber material is easily heated and deteriorated and cracked, causing the lens to shift or even fall off, thereby reducing the accuracy of the vehicle lens. Stability, severely destructive imaging quality.

An embodiment of the invention provides an optical lens including a first lens barrel, a second lens barrel, a first lens group, and a second lens group. The second lens barrel is at least partially disposed in the first lens barrel. The first lens group includes at least two lenses disposed in the first lens barrel, wherein one lens of the first lens group is thermally fixed to the first lens barrel. The second lens group includes at least two lenses disposed in the second lens barrel.

An embodiment of the invention provides an optical lens including a first lens barrel, a second lens barrel, a first lens group, and a second lens group. The second lens barrel is at least partially disposed in the first lens barrel. The first lens group includes at least two lenses. The second lens group includes at least two lenses disposed in the second lens barrel, wherein one lens of the second lens group is thermally fixed to the second lens barrel. The first lens group and the second lens group comprise at least three glass lenses.

An embodiment of the invention provides an optical lens including a first lens barrel, a second lens barrel, a first lens group, and a second lens group. The second lens barrel is disposed in the first lens barrel. The first lens group is disposed in the first lens barrel but disposed outside the second lens barrel, and the first lens group includes at least one glass lens. The second lens group is disposed in the second lens barrel, and the second lens group includes at least two lenses.

In the embodiment of the present invention, since a plurality of lenses are mounted by using two lens barrels (for example, a first lens barrel and a second lens barrel), all tolerance sensitivity is dispersed in the two lens barrels. Thus, the present invention enables the coaxiality and tolerance of the optical lens to be easily controlled to achieve a stable yield.

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 , the optical lens 100 includes a first lens group 110 , a second lens group 120 , a first lens barrel 131 , and a second lens barrel 132 . The first lens group 110 includes at least two lenses, and the second lens group 120 includes at least two lenses. Taking FIG. 1 as an example, the first lens group 110 includes four lenses 111, 112, 113, and 114, and the second lens group 120 includes two lenses 121 and 122, but the invention is not limited thereto.

The first lens group 110 and the second lens group 120 include at least three glass lenses. For example, the lenses 111 and 114 of the first lens group 110 are glass lenses, and the lens 121 of the second lens group 120 is a glass lens, but the invention is not limited thereto. Alternatively, the first lens group 110 and the second lens group 120 are both glass lenses. Glass lenses are resistant to high temperatures, so they are not susceptible to deterioration in high temperature environments. Therefore, compared with the plastic lens, the glass lens has the advantages of high stability and high temperature resistance, and is suitable for use in a poor and high temperature interior ring mirror.

The first lens group 110 is disposed in the first lens barrel 131 but is disposed outside the second lens barrel 132. The second lens group 120 is disposed in the second lens barrel 132, wherein the second lens barrel 132 is disposed or at least partially disposed in the first lens barrel 131. In an embodiment, at least one lens of the first lens group 110 is thermally fixed to the first lens barrel 131. Taking FIG. 1 as an example, the lens 111 of the first lens group 110 is thermally fixed to one end (left end) of the first lens barrel 131, but the invention is not limited thereto. The first barrel 131 has a fixing portion 131a, and the fixing portion 131a is formed by heat-melting the edge of the first barrel 131, wherein the fixing portion 131a covers the edge of the lens 111. Thus, the lens 111 is thermally fixed to one end of the first barrel 131. Similarly, the second lens group 120 also has at least one lens thermally fixed to the second lens barrel 132. Taking FIG. 1 as an example, the lens 122 of the second lens group 120 is thermally fixed to one end (right end) of the second lens barrel 132. The second lens barrel 132 also has a fixing portion 132a covering the edge of the lens 122, and the fixing portion 132a. It is also formed by hot-melting the edge of the second barrel 132.

The first barrel 131 and the second barrel 132 may be formed by injection molding, and both may be formed by inserting a mold into a mold. Therefore, the first lens barrel 131 and the second lens barrel 132 of the present embodiment do not need to be split into the sub-mold, and have better coaxiality than the existing vehicle lens. Secondly, the first barrel 131 and the second barrel 132 are two independent elements, which can be made of two kinds of molds, so that all tolerance sensitivity of the optical lens 100 can be dispersed in the first barrel 131 and the second barrel 132. In order to achieve stable production, easy control and control.

In the process of manufacturing the optical lens 100, first, the assembly of the lenses 121, 122 and the second barrel 132 is performed. The second barrel 132 has an assembly reference surface 132p, and the lenses 121 and 122 are sequentially placed in the second barrel 132 from the right end of the second barrel 132, wherein the lens 121 abuts against the assembly reference surface 132p. After the lenses 121 and 122 are placed, a hot-melt fixing process is performed, that is, the edge of the right end of the second lens barrel 132 is thermally fused to form a fixing portion 132a covering the edge of the lens 122. As such, the lenses 121 and 122 can be fixed in the second barrel 132.

Next, the second barrel 132 and the lenses 111 to 114 are assembled in the first barrel 131. The first lens barrel 131 has an assembly reference surface 131p, and the lens 114, the assembled second lens barrel 132, and the lenses 113, 112, and 111 are sequentially placed in the first lens barrel 131 from the left end of the first lens barrel 131, wherein The lens 114 abuts against the assembly reference surface 131p. The second barrel 132 abuts against the lens 114, and the fixed portion 132a of the second barrel 132 faces the lens 114. After the second barrel 132 and the lenses 111 to 114 are placed, a hot-melt fixing process is performed, that is, the edge of the left end of the first barrel 131 is thermally fused to form a fixing portion 131a covering the edge of the lens 111. As such, the lenses 111 to 114 and the second barrel 132 can be fixed in the first barrel 131, thereby completing the optical lens 100.

In the manufacturing process of the optical lens 100, since the lenses 111 to 114 and the second barrel 132 are sequentially placed from the one end (left end) of the first barrel 131 in the first barrel 131, and are passed through a single assembly. The reference surface 131p is assembled, so that all the lenses 111 to 114 of the first lens group 110 are placed in the first lens barrel 131 in one direction, which has the advantages of simple and quick assembly, and is suitable for automated mass production. In addition, the lens is assembled in the first lens barrel 131 by means of hot-melt fixing, and no rubber material is used. Therefore, the optical lens 100 of the present invention does not appear because compared with the conventional vehicle lens fixed with the rubber material. When the rubber is heated to cause the lens to be displaced or detached, it has better precision and stability while maintaining or improving the image quality. In addition, in an embodiment, the optical lens 100 further includes a spacer ring 140 disposed in the first barrel 131, wherein the spacer ring 140 can be sandwiched between the lenses 112 and 113, and the lenses 113, 114 and the second mirror The barrel 132 is fixed between the assembly reference surface 131p and the spacer ring 140. However, in other embodiments, the optical lens 100 may not include the spacer ring 140, and the invention is not limited thereto.

2 is a cross-sectional view showing an optical lens according to another embodiment of the present invention. Referring to FIG. 2, the optical lens 200 is similar to the optical lens 100 described above. The differences between the optical lenses 200 and 100 will be described below, and the same portions will not be repeatedly described.

In the optical lens 200, the first lens group 210 and the second lens barrel 232 are both disposed in the first lens barrel 231, and the second lens group 220 is disposed in the second lens barrel 232. The first lens group 210 includes lenses 211, 212, 213, and 214, wherein the lens 214 abuts against the assembly reference surface 231p of the first lens barrel 231, and the fixing portion 231a of the first lens barrel 231 covers the edge of the lens 211 to make the lens 211 is heat-sealed to one end of the first barrel 231. The second lens group 220 includes lenses 221 and 222, wherein the lens 222 abuts against the assembly reference surface 232p of the second lens barrel 232, and the fixing portion 232a of the second lens barrel 232 covers the edge of the lens 221 to thermally fix the lens 221 At one end of the second barrel 232. Unlike the optical lens 100 of the foregoing embodiment, the fixing portion 232a of the second barrel 232 faces in a direction different from the fixing portion 132a of the foregoing embodiment, wherein the fixing portion 232a faces the lens 213. In addition, in the embodiment shown in FIG. 2, the optical lens 200 further includes a spacer ring 240 disposed in the first barrel 231, wherein the spacer ring 240 abuts against the second barrel 232 and is sandwiched by the second barrel Between 232 and lens 213. However, in other embodiments, the optical lens 200 may not include the spacer ring 240, so the invention is not limited thereto.

In summary, the present invention employs two lens barrels (for example, a first lens barrel and a second lens barrel) to mount a plurality of lenses, thereby dispersing all tolerance sensitivity in the two lens barrels, thereby facilitating management of the optical lens. The concentricity and tolerances are easy to control to achieve a stable yield. In addition, the optical lens of the present invention can be equipped with all the lenses by hot-melt fixing instead of the conventional glue fixing, so that the optical lens of the present invention does not suffer from thermal deterioration and cracking of the rubber. Compared with the conventional vehicle lens, the present invention can maintain or enhance the imaging quality of the optical lens in the high temperature interior ring mirror.

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‧‧‧ optical lens

110, 210‧‧‧ first lens group

111, 112, 113, 114, 121, 122, 211, 212, 213, 214, 221, 222‧‧ lens

120, 220‧‧‧second lens group

131, 231‧‧‧ first lens barrel

131a, 132a, 231a, 232a‧‧‧ fixed parts

131p, 132p, 231p, 232p‧‧‧ assembly datum

132, 232‧‧‧ second lens barrel

140, 240‧‧‧ spacer ring

1 is a cross-sectional view showing an optical lens according to an embodiment of the present invention. 2 is a cross-sectional view showing an optical lens according to another embodiment of the present invention.

Claims (10)

An optical lens comprising: a first lens barrel; a second lens barrel at least partially disposed in the first lens barrel; a first lens group comprising at least two lenses disposed in the first lens barrel; And a second lens group comprising at least two lenses disposed in the second lens barrel, wherein one lens of the first lens group is thermally fixed to the first lens barrel. The optical lens of claim 1, wherein one lens of the second lens group is thermally fixed to the second lens barrel. An optical lens comprising: a first lens barrel; a second lens barrel at least partially disposed in the first lens barrel; a first lens group comprising at least two lenses; and a second lens group comprising at least two The lens is disposed in the second lens barrel, wherein one lens of the second lens group is thermally fixed to the second lens barrel, and the first lens group and the second lens group comprise at least three glass lenses. The optical lens of claim 3, wherein one of the first lens groups is thermally fixed to the first lens barrel. The optical lens of any of the preceding claims, wherein the lens of the first lens group is thermally fixed to one end of the first lens barrel. An optical lens comprising: a first lens barrel; a second lens barrel disposed in the first lens barrel; a first lens group disposed in the first lens barrel but disposed on the second lens barrel And the first lens group includes at least one glass lens; and a second lens group disposed in the second lens barrel, the second lens group comprising at least two lenses. The optical lens of claim 6, wherein the optical lens satisfies one of the following conditions: (1) a lens of the first lens group is thermally fixed to the first lens barrel; (2). the second lens group One lens is thermally fixed to the second lens barrel; and (3). The first lens group and the second lens group comprise at least three glass lenses. The optical lens of any one of claims 1 to 4, 6, or 7, further comprising: a spacer ring disposed in the first lens barrel. The optical lens of any one of claims 1 to 4, wherein the first lens group and the second lens group are glass lenses. The optical lens of any one of claims 1 to 4, wherein the first lens group is placed in the first lens barrel in one direction.