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Optical lens

An optical lens and lens technology, applied in the field of optical lenses, can solve the problems of small field of view and small focal length, and achieve the effect of large field of view

Active Publication Date: 2022-03-01
JIANGXI LIANCHUANG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the telephoto lens has a long focal length, but the field of view is small, it is generally used for capturing and observing long-distance objects; although the wide-angle lens has a large field of view, but the focal length is small, it is generally used for capturing and observing close-range objects; therefore, it is necessary to design a compatible The function of telephoto lens and wide-angle lens, and has a large aperture, large field of view and high resolution optical lens, to replace the traditional multiple lenses with a single function in the automatic driving assistance system

Method used

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  • Optical lens
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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] see figure 1 , which is a schematic diagram of the structure of the optical lens provided in Embodiment 1 of the present invention. The optical lens includes in sequence from the object side to the imaging surface along the optical axis: a first lens L1, a second lens L2, a stop ST, and a third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the filter G1 and the protective glass G2.

[0092] The first lens L1 has negative refractive power, the object side S1 is concave, and the image side S2 is concave; the second lens L2 has negative refractive power, the object side S3 is concave, and the image side S4 is convex; the stop ST; The third lens L3 has positive refractive power, and its object side S5 and image side S6 are both convex surfaces; the fourth lens L4 has positive refractive power, and its object side S7 and image side S8 are both convex surfaces; the fifth lens L5 has negative optical focus degree, the object side S9 is concave, and the im...

Embodiment 2

[0105] see Figure 6 , which is a schematic diagram of the structure of the optical lens provided in Embodiment 2 of the present invention, the optical lens includes in sequence from the object side to the imaging surface along the optical axis: a first lens L1, a second lens L2, a third lens L3, a diaphragm ST, the fourth lens L4, the fifth lens L5, the sixth lens L6, the filter G1 and the protective glass G2.

[0106] The first lens L1 has negative refractive power, the object side S1 is concave, and the image side S2 is concave; the second lens L2 has negative refractive power, the object side S3 is concave, and the image side S4 is convex; the third lens L3 It has positive refractive power, and its object side S5 and image side S6 are both convex surfaces; stop ST; the fourth lens L4 has positive refractive power, and its object side S7 and image side S8 are both convex surfaces; the fifth lens L5 has negative optical focus The object side S9 is concave, and the image sid...

Embodiment 3

[0119] see Figure 11 , which is a schematic diagram of the structure of the optical lens provided in Embodiment 3 of the present invention, the optical lens includes in sequence from the object side to the imaging surface along the optical axis: a first lens L1, a second lens L2, a third lens L3, a diaphragm ST, the fourth lens L4, the fifth lens L5, the sixth lens L6, the filter G1 and the protective glass G2.

[0120] The first lens L1 has negative refractive power, the object side S1 is concave, and the image side S2 is concave; the second lens L2 has negative refractive power, the object side S3 is concave, and the image side S4 is convex; the third lens L3 It has positive refractive power, and its object side S5 and image side S6 are both convex surfaces; stop ST; the fourth lens L4 has positive refractive power, and its object side S7 and image side S8 are both convex surfaces; the fifth lens L5 has negative optical focus The object side S9 is concave, and the image si...

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Abstract

The invention discloses an optical lens, which comprises six lenses in total, and sequentially comprises a first lens with negative focal power, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with negative focal power and a fifth lens with negative focal power from an object side to an image side along an optical axis, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; the object side surface and the image side surface of the third lens are convex surfaces; the object side surface and the image side surface of the fourth lens are convex surfaces; the object side surface of the fifth lens is a concave surface, and the image side surface of the fifth lens is a convex surface; the object side surface of the sixth lens is a convex surface, and the image side surface of the sixth lens is a concave surface; the fourth lens and the fifth lens are glued to form a glued lens; the effective focal length f of the optical lens and the real image height IH corresponding to the maximum field angle meet the condition that f / IH is larger than 0.55 and smaller than 0.65.

Description

technical field [0001] The invention relates to the technical field of imaging lenses, in particular to an optical lens. Background technique [0002] In recent years, the automatic driving assistance system has developed rapidly, and the image algorithm is also being updated. As a key component for the automatic driving assistance system to obtain external information, the on-board lens also needs to be updated to meet the needs of the current stage. [0003] At present, the information acquisition of conventional automatic driving assistance systems in a single direction is usually inseparable from telephoto lenses and wide-angle lenses. Although the telephoto lens has a long focal length, but the field of view is small, it is generally used for capturing and observing long-distance objects; although the wide-angle lens has a large field of view, but the focal length is small, it is generally used for capturing and observing close-range objects; therefore, it is necessary ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/06G02B13/18
CPCG02B13/006G02B13/06G02B13/0045
Inventor 陈伟建徐宇轩
Owner JIANGXI LIANCHUANG ELECTRONICS CO LTD