Imaging lens group

A lens group and lens technology, applied in optical components, instruments, optics, etc., can solve the problems of large field of view, large aperture, small size, and high pixel at the same time

Active Publication Date: 2022-05-27
ZHEJIANG SUNNY OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide an imaging lens group to solve the problem that the imaging lens group in the prior art has a large viewing angle, a large aperture, a small size and a high pixel at the same time.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] like Figure 1 to Figure 21 As shown, the imaging lens group sequentially includes a first lens with optical power, a second lens with optical power, a third lens with optical power, and a first lens with positive power from the object side to the imaging side along the optical axis. The fourth lens, the fifth lens with refractive power, the sixth lens with refractive power, and the seventh lens with positive refractive power; the object side of the first lens is convex; the object side of the sixth lens is concave; the seventh lens is concave; The imaging side of the lens is convex; among them, the maximum half-field angle Semi-FOV of the imaging lens group satisfies: Semi-FOV>80.0; the effective focal length of the sixth lens f6, the effective focal length of the seventh lens f7 and the effective focal length of the imaging lens group The focal length f satisfies: -1.3<(f6+f7) / f<0.

[0064] Preferably, -1.2<(f6+f7) / f<0.

[0065] By rationally configuring the refract...

Embodiment 2

[0082] like Figure 1 to Figure 21 As shown, the imaging lens group sequentially includes from the object side to the imaging side along the optical axis: a first lens with optical power, and the object side surface is convex; a second lens with optical power; and a third lens with optical power ; The fourth lens with positive power; The fifth lens with power; The sixth lens with power, its object side is concave; The seventh lens with positive power, its imaging side is convex; Wherein , the effective focal length f6 of the sixth lens, the effective focal length f7 of the seventh lens and the effective focal length f of the imaging lens group satisfy: -1.3<(f6+f7) / f<0; the effective focal length f of the imaging lens group and the imaging lens group The entrance pupil diameter EPD of the lens group satisfies: f / EPD<2.8.

[0083] Preferably, -1.2<(f6+f7) / f<0.

[0084] Preferably, f / EPD<2.5.

[0085] By rationally configuring the refractive power and surface shape of each le...

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Abstract

The invention provides an imaging lens group. The imaging lens group sequentially comprises a first lens with focal power from the object side to the imaging side along the optical axis, a second lens with focal power and a third lens with focal power from the object side to the imaging side, a second lens with focal power; a third lens with focal power; the fourth lens has positive focal power; a fifth lens with focal power; the object side surface of the sixth lens is a concave surface; the imaging side surface of the seventh lens is a convex surface; wherein the maximum half field angle Se -FOV of the imaging lens group satisfies Se -FOVgt; 80.0, 80.0; the effective focal length f6 of the sixth lens, the effective focal length f7 of the seventh lens and the effective focal length f of the imaging lens group meet the following formula:-1.3 lt; (f6 + f7) / flt; 0. According to the invention, the problem that an imaging lens group in the prior art is difficult to give consideration to large field angle, large aperture, small size and high pixel at the same time is solved.

Description

technical field [0001] The present invention relates to the technical field of optical imaging equipment, in particular, to an imaging lens group. Background technique [0002] In recent years, with the continuous development of imaging lens sets and imaging chip technologies, traditional vision systems based on conventional imaging lens sets have been unable to meet the needs of many applications due to their limited field of view. The wide-angle imaging feature has the remarkable feature of a large field of view, and has become the focus and hotspot of current computer vision research. The fisheye lens is an ultra-wide-angle lens based on bionics. By introducing barrel distortion, the physical space is "compressed and deformed" to obtain a large viewing angle. At the same time, the imaging lens group with a large field of view generally needs to have high pixels to meet the user's pursuit of imaging quality; while having high pixels, the overall size of the imaging lens g...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G02B13/06G02B13/00G02B13/18
CPCG02B13/06G02B13/0045G02B13/18G03B30/00
Inventor高扬徐武超戴付建赵烈烽
OwnerZHEJIANG SUNNY OPTICAL CO LTD