Optical lens group

An optical lens and lens technology, applied in the field of optical lens sets, can solve problems such as the reduction of the illumination of the optical system

Pending Publication Date: 2019-11-08
江苏光腾光学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problem that the relative illuminance around the optical system decreases when the total length of the 4-piece optical lens group is short, the present invention proposes a 5-piece optical lens group

Method used

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Examples

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Embodiment 1

[0039] Example 1 as figure 1 and figure 2 As shown, the structure of each lens in the lens group refers to figure 2 As shown, the first lens 110, the second lens 120, the third lens 130, the fourth lens 140, and the fifth lens 150 are all made of plastic; 100 is an aperture arranged between the object side and the first lens 110; a plane lens 170 is an infrared filter made of glass.

[0040] In this example:

[0041] The first lens 110 has a positive refractive power;

[0042] The second lens 120 has a negative refractive power;

[0043] The third lens 130 has a negative refractive power;

[0044] The fourth lens 140 has positive refractive power, and the image side 141 is convex;

[0045] The fifth lens 150 has negative refractive power. The image side 151 includes a concave surface 1511 located near the optical axis, and the image side also includes at least one convex surface 1521 located near the circumference;

[0046] The object side 111 and the image side 112 o...

Embodiment 2

[0056] Embodiment 2 structure such as Figure 7 As shown, this embodiment uses similar symbols as those in Embodiment 1 to mark similar components, only changing the beginning of the mark to 2, wherein the convex and concave portions of the sides of objects and images are the same as those in Embodiment 1, for example, One lens 210 has an object side 211 , the first lens 210 has an image side 212 , and so on. Embodiment 2 differs from Embodiment 1 in the parameters of curvature radius, lens thickness, lens gap, lens refractive index, dispersion coefficient, and aspheric coefficient.

[0057] Figure 7 Draw a schematic diagram of the spherical aberration, astigmatism and distortion curves of three different wavelengths (486.1nm, 587.6nm, 656.3nm) in this implementation; Figure 7 The left side is the spherical aberration curve; Figure 6 The middle is a schematic diagram of the astigmatism curve; Figure 7 The right side is a schematic diagram of the distorted curve, from ...

Embodiment 3

[0059] Embodiment 3 structure such as Figure 10 As shown, this embodiment uses similar symbols as those in Embodiment 1 to mark similar components, only changing the beginning of the mark to 3, wherein the convex and concave portions of the sides of objects and images are the same as those in Embodiment 1, for example, A lens 310 has an object side 311 , a first lens 310 has an image side 312 , and so on. Embodiment 3 is different from Embodiment 1 in the parameters of radius of curvature, lens thickness, lens gap, lens refractive index, dispersion coefficient, lens focal length, and aspheric coefficient.

[0060] Figure 11 Draw a schematic diagram of the spherical aberration, astigmatism and distortion curves of three different wavelengths (486.1nm, 587.6nm, 656.3nm) in this implementation; Figure 11 The left side is the spherical aberration curve; Figure 11 The middle is a schematic diagram of the astigmatism curve; Figure 11 The right side is a schematic diagram of...

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Abstract

The invention discloses an optical lens group. The optical lens group sequentially comprises from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens and a fifthlens. By designing the concave-convex configuration of the surfaces of the five lenses and controlling related parameters, the overall length of the optical lens group is shortened, the imaging quality is improved, and the optical lens group has good chromatic aberration correction and image bending capability.

Description

technical field [0001] The invention belongs to the field of optical lenses, and particularly designs an optical lens group. Background technique [0002] As the application of camera modules becomes more and more extensive, applying camera module devices to various smart electronic products, entertainment devices, sports devices and home intelligent assistance systems is the trend of future technological development. The traditional optical system mounted on the electronic device mainly adopts a 4-piece lens structure. The configuration of the lens shape often leads to a decrease in the relative illuminance around the optical system with a short total length, and the problem of poor lens molding, so that the optical system will It cannot meet the needs of higher-level photography. Contents of the invention [0003] In order to solve the problem that the relative illuminance around the optical system decreases when the total length of the 4-piece optical lens group is sho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18G02B1/04
CPCG02B1/041G02B13/0015G02B13/0045
Inventor 曾咏杰
Owner 江苏光腾光学有限公司
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