TWI395986B - Lens module and method for assembling same - Google Patents

Description

Lens module and assembly method thereof

The invention relates to a lens module assembly technology, in particular to a lens module assembly method for facilitating adjustment of a lens position and a lens module assembled therewith.

With the development of the camera industry, camera modules have been widely used in various types of camera devices. Camera modules are built into various portable electronic devices, such as mobile phones, camcorders, and computers, and are favored by many consumers.

The camera module usually includes at least one lens module and an image sensor disposed opposite the lens module. The lens module may include a lens barrel, and one or a plurality of lenses, an aperture plate, an infrared filter and the like disposed in the lens barrel. Due to the miniaturization requirements of portable electronic devices, the size of the lens module is also decreasing, which requires the lens module assembly process to be more precise. The components in the lens module, especially the assembly yield of each lens, such as the presence or absence of optical axis eccentricity, will directly affect the optical performance of the lens module.

When the lens module is assembled, the components are usually placed into the lens barrel from above the lens barrel by a pick-and-place tool such as a nozzle, a clip or a robot. However, this type of assembly requires that after the component group is loaded into the lens barrel, a measurement instrument such as an MTF (Modulation Transfer Function) measuring machine can be used to measure the presence or absence of the optical axis eccentricity of the assembled lens module. The problem, and after the eccentricity of the optical axis, it is difficult to adjust the position of the lens and correct the optical axis of all the lenses on the same line.

In view of this, it is necessary to provide a lens module assembly method and an assembled lens module which are convenient for adjusting the position of the lens and improving the assembly yield.

A lens module assembling method will be described below by way of an embodiment.

And, a lens module is described by way of an embodiment.

A lens module assembly method includes the following steps: providing a lens barrel and at least one lens, the lens barrel having a barrel mouth, an outer side wall and an inner side wall, and an opening is formed through the outer side wall and the inner side wall of the lens barrel a dimension of the opening in the axial direction of the lens barrel is the same as a height of the sidewall of the lens barrel, and a width dimension of one of the at least one lens is smaller than a dimension of the opening along a radial direction of the sidewall of the lens barrel; a lens is inserted into the lens barrel through the opening of the lens barrel; and the at least one lens is optically energy-measured from the barrel of the lens barrel into the lens barrel by a measuring instrument for self-sufficiency The opening adjusts the at least one lens to a suitable position.

A lens module includes a lens barrel having a barrel opening, an outer side wall and an inner side wall, and at least one lens, wherein the outer side wall and the inner side wall of the lens barrel have an opening therethrough, the opening along the barrel axis The dimension of the direction is the same as the height of the sidewall of the barrel, and a width dimension of one of the at least one lens is smaller than a dimension of the opening along a radial direction of the sidewall of the barrel, and the at least one lens is assembled through the opening The lens barrel.

Compared with the prior art, the lens module assembly method assembles the lens from the side wall of the lens barrel, so that the optical performance of the assembled lens can be measured from the barrel of the lens by using the measuring instrument while assembling the lens, so as to facilitate timely Adjust the lens to the right position to improve assembly yield. The lens module The lens module assembled by the assembly method has better optical performance.

The lens module assembly method and the assembled lens module provided by the present invention will be further described in detail below with reference to the accompanying drawings.

The lens module assembly method provided by the embodiment of the invention comprises the following steps: (1) providing a lens barrel 10, two lenses 21, 22, an aperture plate 30, a spacer element 40, and an infrared filter 50, The lens barrel 10 has an outer side wall and an inner side wall, and an outer opening and an inner side wall of the lens barrel 10 have an opening 11 (see FIG. 1); and (2) the lens 21, the aperture piece 30, the lens 22, The spacer element 40 and the infrared filter 50 are sequentially assembled into the lens barrel 10, wherein the lenses 21, 22 are assembled into the lens barrel 10 through the opening 11 of the lens barrel 10, the aperture sheet 30 The spacer element 40 and the infrared filter 50 are assembled into the lens barrel 10 via the barrel of the lens barrel 10.

In step (1), referring to FIG. 1, the size of the opening 11 of the lens barrel 10 in the axial direction of the lens barrel 10 is the same as the height of the side wall of the lens barrel 10, and preferably, the opening 11 is along The arcs of the outer side wall and the inner side wall of the lens barrel 10 have an arc angle of between 80 and 100 degrees. In this embodiment, the arc angle is 90 degrees. A thread is disposed on the outer side wall of the lens barrel 10 to facilitate connection with an external device, for example, a base that carries an image sensor, an analog-to-digital converter, or the like. The lenses 21 and 22 respectively include a circular transparent portion 210, 220 and mounting portions 212, 222 extending radially from the edges of the transparent portions 210, 220. The light transmitting portions 210 and 220 may be spherical or aspherical, and the mounting portions 212 and 222 respectively extend radially from opposite edges of the transparent portions 210 and 220 to make the lenses 21 and 22 become non- In the circular structure, the lenses 21 and 22 are in the longitudinal direction in which the mounting portions 212 and 222 extend, and the lengths thereof are all L. The lenses 21 and 22 are both perpendicular to the longitudinal direction thereof. That is, the width R of the width is the outer diameter of the light transmitting portions 210, 220. The length dimension L of the lenses 21, 22 is slightly smaller than the inner diameter of the lens barrel 10, and the width dimension R is slightly smaller than the dimension of the opening 11 of the lens barrel 10 along the radial direction of the outer side wall and the inner side wall of the lens barrel 10. D1, D2, so that the lens barrel 10 can be assembled from the opening 11.

The aperture plate 30 has a diaphragm aperture for controlling the amount of light entering. When the aperture sheet 30 is assembled between the two lenses 21, 22, it can simultaneously serve to separate the two lenses 21, 22. The spacer element 40 can be used for each component in the lens module, or the lens module and an external device, such as a lens cover, which can be a spacer ring or a circular arc-shaped spacer. In this embodiment, the spacer is spaced. ring. The infrared filter 50 is used to transmit visible light and filter out infrared light that affects imaging.

In the step (2), the pick-and-place tool, such as a clip, may be manually gripped, or the robot automatically grips the lens 21, moves to the opening 11 of the lens barrel 10, and assembles the lens 21 into the assembly. It is described in the lens barrel 10. While the pick-and-place tool assembles the lens 21, a measuring instrument such as an MTF measuring machine (not shown) can be used to measure the optical performance of the lens in the barrel of the lens barrel 10 in time to detect the assembly yield of the lens 21. It is convenient for the pick-and-place tool to adjust the lens 21 to a suitable position in time. After the lens 21 is positioned, the same pick-and-place device as described above can be used, or the aperture plate 30 can be taken from the barrel of the lens barrel 10 by the nozzle. The lens cartridge 10 is assembled and placed on the lens 21. Next, the lens 22 is assembled in the same assembly as the lens 21. Then, the spacer element 40 and the infrared filter 50 can be assembled using the same assembly method as the aperture sheet 30.

After the assembly, the lens module 100 is formed as shown in FIG. 2 and FIG. 3, and an opening is formed in the outer side wall and the inner side wall of the lens barrel 10, and the elements are stacked on each other in the lens barrel 10. Preferably, after the infrared filter 50 is assembled, glue can be inserted from the barrel of the lens barrel 10 along the inner wall to fix the infrared filter 50 in the lens barrel 10, so that the image side can be placed at the same time. The other components described above are more stably positioned within the lens barrel 10.

It can be understood that the lenses 21 and 22 are not limited to the above-mentioned mounting portions 212 and 222 extending radially from opposite edges of the transparent portions 210 and 220 respectively, so that the width dimension R is the light transmitting portion 210, The outer diameter of 220, so as to form a non-circular structure, the mounting portions 212, 222 can also extend the peripheral edges of the transparent portions 210, 220, respectively, and only need to make the width dimension R of the shape of the finally formed lens 21, 22 The opening 11 of the side wall of the lens barrel 10 may be slightly smaller than the dimension D1, D2 in the radial direction of the outer side wall and the inner side wall of the lens barrel 10, so that the lenses 21, 22 can be flatly assembled into the opening 11. Of course, the lenses 21, 22 can also be directly formed into a circular structure, and the lens barrel 10 can be accessed only when the opening 11 of the side wall of the lens barrel 10 is assembled.

When the lens is only one or more than the above two, it can also be assembled in sequence with the aperture plate 30, the spacer element 40, the infrared filter 50 and the like according to the above method.

Of course, the aperture plate 30 and the infrared filter 50 are limited to the above assembly. In a sequence and an assembly manner, the aperture plate 30 may be disposed in the spacer element 40. When the aperture plate 30 has a plurality of aperture holes having different apertures, the solenoid valve may be driven to replace the aperture aperture when necessary. The infrared filter 50 can be formed on the surface of the lens by a plating method.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and those skilled in the art will be able to make equivalent modifications or changes in accordance with the spirit of the present invention. It should be covered by the following patent application.

10‧‧‧Mirror tube

11‧‧‧ openings

21,22‧‧‧ lenses

210,220‧‧‧Transmission Department

212, 222‧‧‧ Installation Department

30‧‧‧ aperture film

40‧‧‧ Spacer components

50‧‧‧Filter

100‧‧‧ lens module

1 is a perspective view showing the assembly of a lens barrel, a lens, a spacer element, a diaphragm, and an infrared filter used in an embodiment of the present invention.

2 is a perspective view of the lens module assembled in FIG.

Figure 3 is a schematic cross-sectional view taken along line III-III of Figure 2.

10‧‧‧Mirror tube

11‧‧‧ openings

21,22‧‧‧ lenses

210,220‧‧‧Transmission Department

212, 222‧‧‧ Installation Department

30‧‧‧ aperture film

40‧‧‧ Spacer components

50‧‧‧Filter

Claims (12)

A lens module assembly method includes the following steps: providing a lens barrel and at least one lens, the lens barrel having a barrel mouth, an outer side wall and an inner side wall, and an opening is formed through the outer side wall and the inner side wall of the lens barrel a dimension of the opening in the axial direction of the lens barrel is the same as a height of the sidewall of the lens barrel, and a width dimension of one of the at least one lens is smaller than a dimension of the opening along a radial direction of the sidewall of the lens barrel; a lens is inserted into the lens barrel through the opening of the lens barrel; and the at least one lens is optically energy-measured from the barrel of the lens barrel into the lens barrel by a measuring instrument for self-sufficiency The opening adjusts the at least one lens to a suitable position. The lens module assembly method of claim 1, wherein the opening has an arc angle of between 80 degrees and 100 degrees along a radial direction of the side wall of the lens barrel. The method of assembling a lens module according to claim 1, wherein the at least one lens comprises a circular transparent portion and a mounting portion extending radially from an edge of the transparent portion. The lens module assembly method of claim 3, wherein the mounting portion extends from opposite edges of the light transmitting portion, and the direction of the light transmitting portion perpendicular to the extending direction of the mounting portion is The diameter is the width dimension of the at least one lens. The method of assembling a lens module according to claim 1, wherein when the at least one lens is plural, the adjacent lenses are assembled by a spacer element, and the spacer element passes through the barrel of the lens barrel. Grouping the mirror In the tube. The lens module assembly method of claim 5, wherein the spacer element is a spacer ring or a spacer. The lens module assembly method of claim 1, wherein the lens module assembly method further comprises assembling an aperture plate and an infrared filter, wherein the aperture plate and the infrared filter pass through the lens barrel. The barrels are sequentially assembled into the barrel. A lens module includes a lens barrel having a barrel opening, an outer side wall and an inner side wall, and at least one lens, wherein the outer side wall and the inner side wall of the lens barrel have an opening therethrough, the opening along the barrel axis The dimension of the direction is the same as the height of the sidewall of the barrel, and a width dimension of one of the at least one lens is smaller than a dimension of the opening along a radial direction of the sidewall of the barrel, and the at least one lens is assembled through the opening The lens barrel. The lens module of claim 8, wherein the opening has an arc angle between 80 degrees and 100 degrees along a radial direction of the side wall of the lens barrel. The lens module of claim 8, wherein the at least one lens comprises a circular light transmitting portion and a mounting portion extending radially from the edge of the light transmitting portion. The lens module of claim 10, wherein the mounting portion extends from opposite edges of the light transmitting portion, and a diameter of the light transmitting portion perpendicular to a direction in which the mounting portion extends is The width dimension of the lens. The lens module of claim 8, wherein when the at least one lens is plural, the adjacent lenses are separated by a spacer element.