TWI394447B - Lens and lens module - Google Patents

Description

Lens and lens module

The present invention relates to the field of camera technology, and in particular, to a lens and a lens module.

With the rapid development of multimedia technology, digital cameras, cameras and other camera devices are increasingly favored by consumers. It is hoped that the image quality of the camera device will continue to improve, and it is also expected that the structure will develop in a light, thin and short direction.

The lens module is an important imaging component in the camera device, which usually includes a lens, a lens barrel and a lens holder. The lenses are used for optical imaging. The lens barrel is usually a cylindrical body in which a lens can be housed. Moreover, the outer wall of the lens barrel is provided with an external thread to facilitate installation into the lens holder. The lens holder has a receiving hole for receiving the lens barrel, and the hole wall is provided with an internal thread matched with the external thread of the lens barrel. When assembling the lens module, the lens group can be first loaded into the lens barrel, and the lens barrel is screwed into the lens holder by screwing, thereby completing the assembly of the lens module.

However, the previous lens module has many components, large volume and large weight, and is not suitable for the trend of miniaturization, thinning and thinning of electronic products. Moreover, more assembly steps are required, which makes the assembly method more complicated and affects the production speed and efficiency of the lens module. Ho-Seop Jeong et al., Papers published in the 2006 Current Developments in Lens Design and Optical Engineering, Low-profile Optic Design for Mobile Camera using Dual Freeform Reflective Lenses A lens module is proposed that combines a plurality of lenses into a lens group to reduce the thickness of the lens module. However, such a lens module needs to be replaced by an image converter. Combining the images formed by each of the imaging lenses in the lens group not only increases the number of lens module components, but also makes the structure of the lens module more complicated and requires higher production costs.

In view of the above, it is necessary to provide a lens and a lens module that can realize a compact size and a simple structure of an imaging device.

Hereinafter, a lens and a lens module will be described by way of embodiments, which are easy to realize miniaturization and simplification of the structure of the imaging device.

A lens comprising a lens portion for performing an optical function, and a peripheral portion surrounding and connecting the lens portion, the peripheral portion having a first surface, a second surface and a side surface, the first surface and the second surface In contrast, the side surface connects the first surface and the second surface, the side surface being provided with a thread to screw the lens to the lens holder.

A lens module includes a lens holder and a lens as described above, the lens holder has a receiving hole, and the hole wall is provided with a thread matched with the thread of the lens, and the lens is screwed into the receiving hole of the lens holder by screwing .

The lens and the lens module of the technical solution have the following advantages: Firstly, the lens has a thread and can be directly screwed and mounted on the lens holder, thereby omitting the lens barrel structure of the prior art lens module, so that the lens module has a simple structure and a small volume. Secondly, the production cost of the thread on the lens is low; again, the lens can accommodate other optical components, so that the lens module can also accommodate a plurality of optical components to achieve better imaging quality.

10,20,30‧‧‧ lenses

110‧‧‧ Optical lens surface

121,221‧‧‧ first surface

123,323‧‧‧ side

230‧‧‧ wall

232‧‧‧ top surface

234, 334‧‧‧ outside side

400,500‧‧‧ lens module

41‧‧‧First body

411‧‧‧ hole wall

43‧‧‧Image sensor

301‧‧‧first lens

303‧‧‧second lens

11,21,31‧‧‧Lens Department

12, 22, 32‧ ‧ peripherals

122, 222‧‧‧ second surface

23,33‧‧‧ 容 部

231,331‧‧‧ accommodating holes

233‧‧‧ bottom

235‧‧‧ inside

40,50‧‧‧ mirror base

410‧‧‧ receiving hole

42‧‧‧Second body

44‧‧‧ glass plate

302‧‧‧First spacer ring

304‧‧‧Second spacer ring

1 is a cross-sectional view of a lens provided by a first embodiment of the present technical solution.

2 is a cross-sectional view of a lens provided by a second embodiment of the present technical solution.

3 is a cross-sectional view of a lens provided by a third embodiment of the present technical solution.

4 is a cross-sectional view of a lens module according to a fourth embodiment of the present technical solution.

FIG. 5 is a cross-sectional view of a lens module according to a fifth embodiment of the present technical solution.

The lenses and lens modules provided by the present technical solution will be further described in detail below with reference to the accompanying drawings and the embodiments.

Referring to FIG. 1 , the lens 10 provided by the first embodiment of the present technical solution includes a lens portion 11 and a peripheral portion 12 . The lens 10 is preferably a plastic lens. For example, the material may be polymethyl acrylate, polycarbonate, carbonic acid acrylic acid or the like. Of course, the lens 10 can also be a glass lens or a composite lens.

The lens portion 11 is an optical path region for realizing the optical function of the design. The lens portion 11 has an optical lens surface 110 which may be a spherical surface or an aspherical surface.

The peripheral portion 12 is a non-optical path region for supporting the lens portion 11. The peripheral portion 12 is an annular body that surrounds and connects the lens portion 11. The peripheral portion 12 has a first surface 121, a second surface 122, and a side surface 123 connected to the first surface 121 and the second surface 122. The first surface 121 is opposite the second surface 122 and is perpendicular to the optical axis of the lens 10. The side surface 123 is an annular surface, and the axis of the annular surface is parallel to the optical axis of the lens 10. The side 123 is provided with threads for mating with the threads of the mirror mount to mount the lens 10 into the mirror mount. The threads of the side 123 can be various connecting threads, such as ordinary fine thread, pipe thread, and the like. The thread of the side surface 123 can be formed by machining, or can be formed by injection molding or press molding.

Since the lens 10 has a thread, it can be directly screwed into the lens holder. The lens 10 can be mounted by first absorbing the lens portion 11 of the lens 10 with a vacuum nozzle and then screwing the lens 10 into the lens holder. Alternatively, the peripheral portion 12 of the peripheral portion 12 can be firstly gripped by the clamping tool. The other end of the peripheral portion 12 adjacent to the second surface 122 is screwed into the lens holder; of course, other mounting methods are also possible.

The lens 10 of the technical solution can be directly screwed into the lens holder, which is advantageous for the small size of the lens module. Simplification and structure.

Referring to FIG. 2 and FIG. 3 , the lens 20 provided by the second embodiment of the present invention is substantially the same as the lens 10 of the first embodiment, except that the lens 20 further includes a receiving portion connected to the peripheral portion 22 . twenty three.

The accommodating portion 23 is a cylindrical body formed by the wall body 230, and has a receiving hole 231 in the middle portion. The accommodating hole 231 is used for accommodating other optical elements such as a common lens, a filter, and a spacer ring, so that the lens 20 can be combined with other optical components into a lens group, so that the lens group has a small size, a simple structure, and an optical function. Etc.

The accommodating portion 23 has a top surface 232, a bottom surface 233, an outer side surface 234, and an inner side surface 235. The top surface 232 is opposite the bottom surface 233 and is perpendicular to the optical axis of the lens 20. The outer side surface 234 is opposite the inner side surface 235 and is an annular surface, and the axis of the annular surface is parallel to the optical axis of the lens 20.

The accommodating portion 23 can be disposed on the first surface 221 of the peripheral portion 22, that is, the bottom surface 233 is in contact with the first surface 221, and at this time, the accommodating portion 23 is located on one side of the peripheral portion 22. The accommodating portion 23 may also be disposed on the second surface 222 of the peripheral portion 22, that is, the top surface 232 is in contact with the second surface 222. At this time, the accommodating portion 23 is located on the other side of the peripheral portion 22. Of course, the lens 20 can also have two accommodating portions 23, so that the two accommodating portions 23 are respectively disposed on the first surface 221 and the second surface 222, that is, the two accommodating portions 23 are respectively located on both sides of the peripheral portion 22. . In this embodiment, the accommodating portion 23 is disposed on the first surface 221, and the bottom surface 233 is in contact with the first bottom surface 221 .

In order to prevent the accommodating portion 23 from affecting the optical path of the lens portion 21, the inner diameter d1 of the accommodating portion 23 should be greater than or equal to the inner diameter d2 of the peripheral portion 22. Further, the outer diameter D1 of the accommodating portion 23 should be smaller than or equal to the outer diameter D2 of the peripheral portion 22 so as not to affect the screwing of the peripheral portion 22 and the mirror base. The height H of the accommodating portion 23 is not limited, and may depend on the height of the optical element that needs to be accommodated therein. In this embodiment, the inner diameter d1 of the accommodating portion 23 is larger than the inner diameter d2 of the peripheral portion 22, and the outer diameter D1 of the accommodating portion 23 is smaller than the peripheral portion. 22 outer diameter D2.

The accommodating portion 23 may be integrally formed with the peripheral portion 22 and the lens portion 21, or may be separately molded and then fixed to the peripheral portion 22 by adhesive, screws, or the like. In the present technical solution, the accommodating portion 23 is separately molded and then fixed to the first surface 221 of the peripheral portion 22 by an adhesive.

When the lens 20 is mounted, the tool holder accommodating portion 23 can be attached, and the lens 20 can be screwed into the lens holder, so that the lens 20 can be more conveniently assembled into the lens holder.

Referring to FIG. 3 , the lens 30 provided by the third embodiment of the present invention is substantially the same as the lens 20 of the second embodiment, except that the outer diameter D1 of the accommodating portion 33 is equal to the outer diameter D2 of the peripheral portion 32. That is, the outer side surface 334 of the accommodating portion 33 is coplanar with the side surface 323 of the peripheral portion 32. Therefore, the outer side surface 334 may also be provided with a screw for screwing mounting. The thread of the accommodating portion 33 and the thread of the peripheral portion 32 can be integrated, so that the screwing of the lens 30 and the mirror holder can be more stable and convenient. In addition, the lens 30 in this embodiment is an integrally formed lens.

Referring to FIG. 4 , a lens module 400 according to a fourth embodiment of the present invention includes a lens holder 40 and a lens 10 as shown in the first embodiment. The lens 10 is received in the lens holder 40 .

The mirror base 40 includes a first base body 41 and a second base body 42 that are connected. The first seat body 41 has a cylindrical shape and has a receiving hole 410 for receiving the lens 10. The hole wall 411 of the receiving hole 410 is provided with a thread that cooperates with the thread of the lens 10. Therefore, the lens 10 can be screwed into the first seat body 41. The second body 42 is configured to receive the image sensor 43 such that the optical imaging formed by the object through the lens 10 can be received by the image sensor 43 to convert the optical image into a corresponding electronic image signal for output. Preferably, the image sensor 43 may be provided with a glass plate 44 to prevent dust from falling on the image sensor 43.

Of course, the lens holder 40 is not limited to housing a lens 10 as shown in the first embodiment. The lens holder 40 can also accommodate two or more lenses 10, and the lens holder 40 can also accommodate the second embodiment. Three implementation The lenses 20, 30 are shown.

In the lens module 400 of the present invention, the lens can be directly mounted on the lens holder, thereby omitting the structure of the lens barrel, which is advantageous for miniaturization and simplification of the structure of the lens module 400.

Referring to FIG. 5 , a lens module 500 according to a fifth embodiment of the present invention is substantially the same as the lens module 400 shown in the fourth embodiment, except that the lens received in the lens barrel 50 is The lens 30 of the third embodiment, and the receiving portion 33 of the lens 30 is provided with at least one lens. In the embodiment, the first lens 301, the first spacer ring 302, the second lens 303, and the second spacer ring 304 are sequentially accommodated in the accommodating portion 33. The first lens 301 and the second lens 303 are used to cooperate with the lens portion 31 of the lens 30 to form an optical image of the object to be photographed. The first spacer ring 302 is used to partition the first lens 301 and the second lens 303, and the second spacer ring 304 is used to space the second lens 303 and the lens portion 31 to prevent adjacent lenses from being touched to cause damage. The first lens 301, the first spacer ring 302, the second lens 303, and the second spacer ring 304 can be fixed in the receiving hole 331 of the accommodating portion 33 by dispensing.

The lens and the lens module of the technical solution have the following advantages: Firstly, the lens has a thread and can be directly screwed and mounted on the lens holder, thereby omitting the lens barrel structure of the prior art lens module, so that the lens module has a simple structure and a small volume. Secondly, the production cost of the thread on the lens is low; again, the lens can accommodate other optical components, so that the lens module can also accommodate a plurality of optical components to achieve better imaging quality.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

10‧‧‧ lenses

11‧‧‧Lens Department

12‧‧‧ peripherals

110‧‧‧ Optical lens surface

121‧‧‧ first surface

122‧‧‧ second surface

123‧‧‧ side

Claims (9)

A lens comprising a lens portion for performing an optical function, and a peripheral portion surrounding and connecting the lens portion, the peripheral portion having a first surface, a second surface and a side surface, the first surface and the second surface The surface is opposite to the first surface and the second surface, and the side surface is provided with a thread. The improvement is that the lens further includes a receiving portion connected to the peripheral portion, the receiving portion having a receiving hole, the receiving portion having a receiving hole The holes are used to accommodate the optical components. The lens of claim 1, wherein the first surface and the second surface are perpendicular to an optical axis of the lens. The lens of claim 1, wherein the thread is a fine thread or a pipe thread. The lens of claim 1, wherein the peripheral portion is annular, the side surface of which is an annular surface, and the axis of the annular surface is parallel to the optical axis of the lens. The lens according to claim 1, wherein the accommodating portion has a cylindrical shape, an outer diameter of which is smaller than or equal to an outer diameter of the peripheral portion, and an inner diameter of which is greater than or equal to an inner diameter of the peripheral portion. The lens of claim 5, wherein the receiving portion has an annular outer side surface, the outer side surface being provided with a thread. The lens according to claim 6, wherein the accommodating portion is integrally formed with the peripheral portion and the lens portion. A lens module comprising a lens holder and a lens according to any one of claims 1 to 7, wherein the lens holder has a receiving hole, and the hole wall of the receiving hole is provided with a thread matching the thread of the lens The lens is screwed into the receiving hole of the lens holder. The lens module of claim 8, wherein the lens module further comprises at least one lens, the lens being fixed in the receiving hole of the receiving portion.