TWM458564U - Wide viewing angle lens module - Google Patents

Description

Wide viewing angle lens module

This creation belongs to a lens module, especially a wide-angle lens module with wide viewing angle and reduced image dispersion.

Generally, a camera with a wide viewing angle lens has a wide viewing angle, which is accompanied by occurrence of image aberration or the use of glass lenses of different refractive indices, resulting in a difference in the stroke of the light, resulting in dispersion.

In order to reduce the above phenomenon of image aberration and dispersion, the aspherical mirror is used to design the lens. The surface design of the non-spherical mirror is very complicated, so it is difficult to manufacture, and the manufacturing cost is compared with that of the spherical mirror. The cost is higher.

In order to solve the above problems, the wide viewing angle lens module of the present invention has the problems of reducing image aberration and improving dispersion.

The wide viewing angle lens module has a first lens group, an aperture and a second lens group from the object side end, wherein the first lens group includes a first lens, a second lens and a third lens, and the second lens group includes There is a fourth lens and a fifth lens, and an aperture is located between the first lens group and the second lens group.

The first lens in the first lens group is a spherical surface having a negative focal optosity The mirror has a convex lens on one side of the object side and a concave lens on the side facing the image side. The second lens is a spherical lens having a negative focal power. The surface facing the object side is a convex lens, and the side facing the image side is a concave lens. The second lens The mirror edge facing the object side is in contact with the mirror edge of the first lens facing the image side; the third lens is a spherical lens having positive refractive power, and is a convex lens on one side toward the object side and a lens on the image side side.

The fourth lens in the second lens group is a spherical lens of positive focal illuminance, one side facing the object side is a convex lens, one side facing the image side is a convex lens, and the fifth lens is a spherical lens having a negative focal power, the orientation of the object The side surface is a concave lens, and the convex side lens is attached to one side of the image side to form a composite lens.

An aperture is disposed between the first lens group and the second lens group, and the aperture is used to control the amount of light entering the wide-angle lens module.

In order to reduce the influence of infrared rays on the imaging quality of the image, an infrared filter can be added between the second lens group and the image side to filter the infrared rays in the light to improve the image quality.

With the above lens arrangement design, it is possible to reduce the image aberration and dispersion caused by the wide viewing angle of the image, and to improve the image quality.

Referring to FIG. 1 , a first embodiment of the present invention, for example, the wide-angle lens module 1 includes a first lens group 20 and an aperture 30 from the object side 10 end. A second lens group 40 includes a first lens 201, a second lens 202 and a third lens 203. The second lens group 40 includes a fourth lens 401 and a fifth lens 402. The aperture 30 is located between the first lens group 20 and the second lens group 40 for controlling the amount of light entering.

The first lens 201 in the first lens group 20 is a spherical lens having a negative focal power, and a side S1 facing the object side 10 is a convex lens, a side S2 facing the image side 50 is a concave lens, and the second lens 202 is negative. The spherical lens of the focal length has a convex lens S3 on one side of the object side 10 and a concave lens on the side S4 of the image side 50, wherein the second lens 202 faces the mirror edge of the object side 10 side S3 and the first lens 201 faces the image side 50. The mirror edge of one side S2 is in contact with each other; the third lens 203 is a spherical lens having positive refractive power, and a side face S5 is a convex lens toward the object side 10, and a side toward the image side 50 is a convex lens; the first lens 201 and the second lens The 202-edge contact design eliminates assembly tolerances between the two lenses for improved image quality.

In addition, the fourth lens 401 of the second lens group 40 is a spherical lens of positive focal illuminance, and a side S7 facing the object side 10 is a convex lens, a side S8 facing the image side 50 is a convex lens, and the fifth lens 402 has a negative focus. In the luminosity spherical lens, the one surface S9 facing the object side 10 is a concave lens, and the one surface S10 facing the image side 50 is a convex lens, and the fourth lens 401 faces the one side S8 of the image side 50 and the side of the fifth lens 402 facing the object side 10 S9. Forming a composite lens, wherein the Abbe number of the fourth lens 401 is greater than the Abbe number of the fifth lens 402, by the complex The lens is designed to eliminate aberrations and dispersion.

An aperture 30 is disposed between the first lens group 20 and the second lens group 40. The aperture 30 is used to control the amount of light entering the wide-angle lens module 1.

Referring to FIG. 2, another embodiment of the present invention is as follows. The wide-angle lens module 1 has a first lens group 20, an aperture 30 and a second lens group 40, which are sequentially provided from the object side 10 end. A lens group 20 includes a first lens 201, a second lens 202 and a third lens 203. The second lens group 40 includes a fourth lens 401 and a fifth lens 402. The aperture 30 is located in the first lens group 20. Between the second lens group 40 and the second lens group 40.

The first lens 201 in the first lens group 20 is a spherical lens having a negative focal power, and a side S1 facing the object side 10 is a convex lens, a side S2 facing the image side 50 is a concave lens, and the second lens 202 is negative. The spherical lens having a focal length is a convex lens S3 on one side toward the object side 10, and a concave lens on the image side 50 side S4. The second lens 202 faces the mirror edge of the object side 10 side S4 and the first lens 201 faces the image side 50 side. The mirror edge of S3 is in contact with each other, and the assembly tolerance can be eliminated by the mirror edge of the first lens 201 and the second lens 202, thereby improving the imaging quality; the third lens 203 is a spherical lens having positive power, which faces the object side 10 One side S5 is a convex lens, and the side S6 is convex toward the image side 50.

In addition, the fourth lens 401 of the second lens group 40 is a spherical lens of positive focal illuminance, and a side S7 facing the object side 10 is a convex lens, a side S8 facing the image side 50 is a convex lens, and the fifth lens 402 has a negative focus. Photometric spherical lens, The one surface S9 facing the object side 10 is a concave lens, and the one surface S10 facing the image side 50 is a convex lens, and the one surface S8 of the fourth lens 401 facing the image side 50 is glued to the one surface S9 of the fifth lens 402 facing the object side 10 to form a The composite lens, wherein the Abbe number of the fourth lens 401 is greater than the Abbe number of the fifth lens 402, the aberration and dispersion can be eliminated by the design of the composite lens.

An aperture 30 is disposed between the first lens group 20 and the second lens group 40. The aperture 30 is used to control the amount of light entering the wide-angle lens module 1.

In order to improve the image quality caused by infrared rays, an infrared filter 60 is added between the second lens group 40 and the image side 50 to filter infrared rays, thereby reducing the influence of infrared rays on the imaged image and improving the image quality.

According to the lens arrangement design described above, it is possible to reduce the image aberration and dispersion caused by the wide viewing angle, and to improve the image quality.

Please refer to FIG. 4A, wherein FIG. 4A is a light spot optical simulation data diagram of the wide viewing angle lens module, and FIG. 4B is a field curvature and image deformation optical simulation data diagram of the wide viewing angle lens module, and FIG. 4C is the figure. The horizontal chromatic aberration optical simulation data diagram of the wide viewing angle lens module, the fourth drawing is the lateral chromatic aberration optical simulation data diagram of the wide viewing angle lens module, and the fourth embodiment is the longitudinal aberration optical simulation data of the wide viewing angle lens module. Figure.

The detailed description of the detailed description and the specific embodiments of the present invention are intended to be illustrative of the present invention and are not intended to limit the scope of the patent application.

1‧‧‧ Wide viewing angle lens module

10‧‧‧ object side

20‧‧‧First lens group

201‧‧‧ first lens

202‧‧‧second lens

203‧‧‧ third lens

30‧‧‧ aperture

40‧‧‧second lens group

401‧‧‧Fourth lens

402‧‧‧ fifth lens

50‧‧‧ image side

60‧‧‧Infrared filter

S1~S10‧‧‧Mirror

FIG. 1 is a schematic structural view of a wide viewing angle lens module.

2 is a schematic structural view of another embodiment of a wide viewing angle lens module

FIG. 3A is a schematic structural view of the first lens group and the second lens group of the wide viewing angle lens module.

Figure 4A-E is an optical simulation data diagram of the wide viewing angle lens module.

1‧‧‧ Wide viewing angle lens module

10‧‧‧ object side

20‧‧‧First lens group

201‧‧‧ first lens

202‧‧‧second lens

203‧‧‧ third lens

30‧‧‧ aperture

40‧‧‧second lens group

401‧‧‧Fourth lens

402‧‧‧ fifth lens

50‧‧‧ image side

Claims (9)

A wide-angle lens module includes a first lens group from the object side to the image side, the first lens group being located on a side of the object side facing the image side, the first lens group The first lens, the second lens and the third lens are composed of an aspherical lens; a second lens group, the first lens The second lens group is disposed on a side of the first lens group facing the image side, and the second lens group is composed of a fourth lens and a fifth lens, wherein the fourth lens and the fifth lens are aspherical a lens; wherein the first lens of the first lens group faces the mirror edge of the image side and the second lens of the first lens group faces the mirror edge of the object side, and the fourth lens of the second lens group It is attached to the fifth lens of the second lens group. The wide viewing angle lens module of claim 1, wherein the first lens group and the second lens group have an aperture therebetween for controlling the amount of light incident. The wide viewing angle lens module of claim 2, wherein the second lens group and the imaging surface have an infrared filter for filtering infrared rays in the light. The wide viewing angle lens module of claim 3, wherein the first lens is a negative power lens, the convex side lens is facing the object side, and the concave lens is facing the image side. The wide viewing angle lens module according to claim 3, wherein the second lens is a negative power lens, and a convex lens is oriented toward the object side. The image side is a concave lens. The wide viewing angle lens module of claim 3, wherein the third lens is a positive power lens having a convex lens facing the object side and a convex lens facing the image side. The wide viewing angle lens module of claim 3, wherein the fourth lens is a positive power lens having a convex lens facing the object side and a convex lens facing the image side. The wide viewing angle lens module according to claim 3, wherein the fifth lens is a negative power lens, the concave lens is facing the object side, and the convex lens is facing the image side. The wide viewing angle lens module of claim 1, wherein the fourth lens and the fifth lens are glued to each other to form a composite lens.