267results about How to "Reduce aberration" patented technology

The invention provides an optical lens, which comprises six lenses which sequentially comprise a first lens with negative focal power, a second lens with negative focal power, a third lens with negative focal power, a fourth lens with negative focal power, a fifth lens with negative focal power and a sixth lens with negative focal power from an object side to an imaging surface, 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 fourth lens has positive focal power, and the object side surface of the fourth lens is a convex surface; the fifth lens has negative focal power, and the image side surface of the fifth lens is a concave surface; and the sixth lens has positive focal power. According to the optical lens provided by the invention, the six lenses with specific focal power are adopted, and through specific surface shape matching and reasonable focal power distribution, the imaging quality of the optical lens can be improved, the aberration can be reduced, the imaging quality of the optical lens can be improved, and the lens has one or more advantages of large target surface, large aperture, high imaging quality and the like.

The invention provides an optical lens, which sequentially comprises a first lens with negative focal power from an object side to an imaging surface along an optical axis, a second lens with negative focal power, a third lens with positive focal power and a fourth lens with negative focal power from the object side to the imaging surface, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a concave surface; the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a convex surface; and the object side surface of the eighth lens is a convex surface, and the image side surface of the eighth lens is a concave surface. According to the optical lens, through specific surface shape matching and reasonable focal power distribution, the imaging quality of the optical lens can be improved, and the optical lens has the advantage of being good in imaging quality.

The invention provides an optical lens, which comprises seven lenses, and sequentially comprises a first lens with negative focal power, a second lens with negative focal power, a third lens with negative focal power, a fourth lens with negative focal power, a fifth lens with negative focal power and a sixth lens with negative focal power from an object side to an imaging surface, the second lens has negative focal power, the object side surface of the second lens is a concave surface near the optical axis, and the image side surface of the second lens is a concave surface; the object side surface and the image side surface of the third lens are concave 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 convex surface, and the image side surface of the fifth lens is a concave surface; the sixth lens has positive focal power, and the object side surface and the image side surface of the sixth lens are convex surfaces; the seventh lens has negative focal power, and the image side surface of the seventh lens is a concave surface near the optical axis; the curvature radius R3 of the object side surface of the second lens and the curvature radius R4 of the image side surface of the second lens satisfy 0.1 lt; (R3 + R4) / (R3-R4) lt; and 0.8. According to the optical lens provided by the invention, the imaging quality of the optical lens can be improved, the aberration is reduced, and the imaging quality of the optical lens is improved.

The invention provides an optical lens, which comprises eight lenses from an object side to an imaging surface along an optical axis: a first lens with negative focal power, a second lens with negative focal power, a third lens with negative focal power, a fourth lens with negative focal power, a fifth lens with negative focal power and a sixth lens with negative focal power, 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 of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the object side surface and the image side surface of the fourth lens are convex surfaces; the fifth lens has positive focal power, and the image side surface of the fifth lens is a convex surface; the sixth lens has positive focal power, and the image side surface of the sixth lens is a convex surface; the object side surface and the image side surface of the seventh lens are concave surfaces; and the object side surface and the image side surface of the eighth lens are convex surfaces. According to the optical lens provided by the invention, the imaging quality of the optical lens can be improved, the aberration is reduced, and the imaging quality of the optical lens is improved.

The invention provides an optical lens and electronic equipment with the same, and the optical lens comprises a first lens which has negative focal power, the first side surface of the first lens is a convex surface, and the second side surface of the first lens is a concave surface; the second lens has negative focal power, the first side surface of the second lens is a concave surface, and the second side surface of the second lens is a convex surface; the third lens has positive focal power; the fourth lens has positive focal power; the fifth lens has positive focal power, and the first side surface and the second side surface of the fifth lens are convex surfaces; a sixth lens, wherein the sixth lens has negative focal power; a seventh lens, wherein the seventh lens has positive focal power; and the eighth lens has focal power, the first side surface of the eighth lens is a convex surface, and the second side surface of the eighth lens is a concave surface. According to the invention, at least one of the problems of difficulty in miniaturization, small field angle, poor imaging quality in a dark environment, poor temperature performance, serious aberration and poor light transmission capability of an optical lens in the prior art is solved.

The invention provides an optical lens which sequentially comprises a first lens with positive focal power from an object side to an imaging surface along an optical axis, a second lens with negative focal power, a third lens with positive focal power and a fourth lens with negative focal power from the object side to the imaging surface, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface; the fourth lens has positive focal power, the object side surface of the fourth lens is a convex surface near the optical axis, and the image side surface of the fourth lens is a concave surface near the optical axis; the fifth lens has positive focal power, the object side surface of the fifth lens near the optical axis is a convex surface, and the image side surface of the fifth lens is a convex surface; the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a convex surface; and the object side surface of the seventh lens is a concave surface, and the image side surface of the seventh lens is a concave surface near the optical axis. According to the optical lens provided by the invention, through specific surface shape matching and reasonable focal power distribution, the imaging quality of the optical lens can be improved, and the optical lens has the advantage of excellent imaging quality.

The embodiment of the invention provides a projection system and optical display equipment. Wherein the projection system comprises a lens group, a prism and a display chip which are arranged in sequence; wherein the lens group is composed of a first lens, a second lens, a third lens and a fourth lens which are sequentially arranged, and the refractive index of the first lens, the refractive index of the second lens, the refractive index of the third lens and the refractive index of the fourth lens are larger than 1.6; the refractive index of the prism is less than 1.55; the projection system satisfies: 1 < = TTL / f < = 1.5; wherein TTL is the total optical length of the projection system, and f is the effective focal length of the projection system.

The invention provides a projection 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 negative focal power, a fourth lens with negative focal power, a fifth lens with negative focal power and a sixth lens with negative focal power from a projection surface to an image source surface, the surface of the projection side of the second lens is a convex surface, and the surface of the image source side of the second lens is a concave surface; the surface of the projection side of the third lens is a concave surface, and the surface of the image source side of the third lens is a convex surface; the surface of the projection side of the fourth lens is a concave surface; the surface of the image source side of the fifth lens is a convex surface; the surface of the projection side and the surface of the image source side of the sixth lens are convex surfaces; wherein the surface curvature radius R11 of the projection side of the sixth lens and the surface curvature radius R12 of the image source side of the sixth lens meet the following conditions:-0.8 lt; (R11 + R12) / (R11-R12) lt; and 0.1. According to the projection lens provided by the invention, the projection quality of the projection lens is improved through the reasonable configuration of the surface types of the lenses and the reasonable matching of the focal power.

The invention provides an optical lens, which sequentially comprises a first lens with negative focal power from an object side to an imaging surface along an optical axis, a second lens with negative focal power, a third lens with negative focal power and a fourth lens with negative focal power from the object side to the imaging surface, the image side surface of the second lens is a convex surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface; the fourth lens has positive focal power, the object side surface of the fourth lens is a convex surface near the optical axis, and the image side surface of the fourth lens is a convex surface; the fifth lens has negative focal power, the object side surface of the fifth lens is a concave surface, and the image side surface of the fifth lens is a concave surface near the optical axis; the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a convex surface; and the object side surface of the seventh lens is a convex surface near the optical axis, and the image side surface of the seventh lens is a concave surface near the optical axis. According to the optical lens provided by the invention, through specific surface shape matching and reasonable focal power distribution, the imaging quality of the optical lens can be improved, and the optical lens has the advantage of excellent imaging quality.

The embodiment of the invention provides an AR lens module and optical display equipment. The AR lens module is used for a full-color AR light machine, and comprises a lens group, an X-cube color combination prism and a display chip which are arranged along the same optical axis, wherein the lens group is composed of a first lens, a second lens, a third lens and a fourth lens which are arranged in sequence, and the fourth lens and the X-cube color combination prism are arranged adjacently; the focal power of the first lens and the third lens is positive, and the focal power of the second lens and the fourth lens is negative; the first lens, the second lens, the third lens and the fourth lens are all aspherical mirrors. The CRA of the AR lens module is 13 degrees, and the CRA is the included angle between the chief light of the edge field of view and the optical axis of the display chip.

The invention belongs to the technical field of optical imaging, and relates to an image space telecentric lens for an imaging spectrometer and the imaging spectrometer. The lens comprises a first negative lens, a second negative lens, a first positive lens, a diaphragm, a second positive lens, a third negative lens, a third positive lens and a fourth positive lens which are sequentially and coaxially arranged in the light path propagation direction. Wherein the first negative lens is meniscus-shaped, and one side, close to the second negative lens, of the first negative lens is a concave surface; the second negative lens and the third negative lens are biconcave lenses; one side, close to the second negative lens, of the first positive lens is a concave surface; the second positive lens, the third positive lens and the fourth positive lens are all biconvex lenses. The multi-layer positive lens and the multi-layer negative lens are combined and alternated, the shape of each lens is limited, the negative lens is used for expanding light rays, and the positive lens is used for focusing and adjusting the light rays, so that the lens can still keep high imaging quality in a large view field range, aberration and distortion are reduced, and chromatic aberration of light rays with different wavelengths is effectively compensated.

The invention discloses an optical lens, a camera module and terminal equipment, the optical lens comprises seven lenses with refractive power, the first lens has negative refractive power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the second lens element with negative refractive power has a concave object-side surface and a convex image-side surface. The third lens element with positive refractive power has a convex object-side surface and a convex image-side surface. The fourth lens element with positive refractive power has a convex object-side surface and a convex image-side surface. A fifth lens element with refractive power; the sixth lens has refractive power, the seventh lens has positive refractive power, and the object side surface of the seventh lens is a convex surface; the optical lens satisfies the following relational expressions: FOV is greater than or equal to 140deg and less than or equal to 151deg, 6.4 lt; tTL / IMGHlt; 7 and 1lt; sAGs1 / CT1lt; and 1.25. According to the optical lens, the camera module and the terminal equipment, high-pixel imaging can be taken into account while the miniaturization design of the optical lens is met.

The invention provides an optical lens, which comprises six lenses which sequentially comprise 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, a fifth lens with negative focal power and a sixth lens with negative focal power from an object side to an image side along an optical axis, the second lens has negative focal power; the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface; the object side surface and the image side surface of the fourth lens are convex surfaces; the fifth lens has negative focal power, and the image side surface of the fifth lens is a concave surface; and the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a convex surface. According to the optical lens provided by the invention, the six lenses with specific focal power are adopted, and through specific surface shape matching and reasonable focal power distribution, the imaging quality of the optical lens can be improved, the aberration can be reduced, the imaging quality of the optical lens can be improved, and the lens has one or more advantages of large target surface, large aperture, high imaging quality and the like.

The invention provides an optical lens, which consists of seven lenses, and sequentially comprises a first lens with negative focal power, a second lens with negative focal power, a third lens with negative focal power, a fourth lens with negative focal power, a fifth lens with negative focal power and a sixth lens with negative focal power from an object side to an imaging surface, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface; the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface; the fifth lens has positive focal power, and the object side surface of the fifth lens is a convex surface; the image side surface is a convex surface; the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a convex surface; and the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface. According to the optical lens provided by the invention, through specific surface shape matching and reasonable focal power distribution, the imaging quality of the optical lens can be improved, the aberration can be reduced, and the imaging quality of the optical lens can be improved.

The invention provides an optical imaging lens, the optical imaging lens has seven lenses with focal power, the optical imaging lens comprises a lens group, a spacing element group and a lens barrel, the curvature radius R12 of the image side surface of a sixth lens and the outer diameter D6s of the object side surface of a sixth spacing element satisfy the following conditions:-2.72 < = R12 / D6s < =-1.15; and the curvature radius R13 of the object side surface of the seventh lens, the outer diameter D6m of the image side surface of the sixth spacing element and the inner diameter d6m of the image side surface of the sixth spacing element meet the condition that R13 / (D6m-d6m) is more than or equal to 10.25 and less than or equal to 11.08. The problem that the rear end of an optical imaging lens in the prior art generates serious aberration is solved.

The invention provides an optical lens, which comprises eight 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, a fifth lens with negative focal power and a sixth lens with negative focal power from an object side to an image side along an optical axis, the object side surface and the image side surface of the second lens are convex surfaces; the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a concave surface near the optical axis; the image side surface of the fourth lens is a convex surface; the fifth lens has positive focal power, and the object side surface and the image side surface of the fifth lens are convex surfaces; the sixth lens has negative focal power, and the object side surface and the image side surface of the sixth lens are concave surfaces; the object side surface and the image side surface of the seventh lens are convex surfaces; the object side surface of the eighth lens is a concave surface, and the image side surface of the eighth lens is a convex surface. According to the optical lens provided by the invention, the imaging quality of the optical lens can be improved, the aberration is reduced, and the imaging quality of the optical lens is improved.

The invention provides an optical lens, which comprises six lenses from an object side to an imaging surface along an optical axis: a first lens with positive 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 positive focal power, 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 of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a concave surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface; the sixth lens has negative focal power; the curvature radius R5 of the object side surface of the third lens and the curvature radius R6 of the image side surface of the third lens meet the formula:-0.9 lt; (R5-R6) / (R5 + R6) lt; and-0.4. According to the optical lens provided by the invention, the six lenses with specific focal power are adopted, and through specific surface shape matching and reasonable focal power distribution, the imaging quality of the optical lens can be improved, the aberration can be reduced, and the imaging quality of the optical lens can be improved.

The invention provides an optical lens and electronic equipment with the same. According to the optical lens, a first lens has negative focal power, the first side face of the first lens is a convex face, and the second side face of the first lens is a concave face; the first side surface of the second lens is a concave surface, and the second side surface of the second lens is a convex surface; the third lens has positive focal power, the first side surface of the third lens is a convex surface, and the second side surface of the third lens is a convex surface; the fourth lens has positive focal power, and the second side surface of the fourth lens is a convex surface; the fifth lens has focal power; the first side surface of the sixth lens and the second side surface of the sixth lens have the same surface type; the seventh lens has focal power, and the second side face of the seventh lens is a convex face. The optical lens solves at least one of the problems that an optical lens in the prior art cannot give consideration to miniaturization and high resolution, is poor in pixel, is poor in imaging quality in a dark environment, and cannot be matched with a higher-pixel chip due to poor central angle resolution while meeting a large field angle.

The invention discloses a 35mm breathing-eliminating full-frame camera lens, and aims to solve the problems that in the prior art, when a visual angle is slightly enlarged or shrunk due to focus change, unnecessary jitter of a picture is caused, the fluency and ornamental value of a video are influenced, and the visual angle is slightly enlarged or shrunk. The lens comprises a variable diaphragm, and a first lens group, a second lens group and a third lens group which are sequentially arranged from an object side to an image side, the first lens group is composed of seven lenses and serves as a fixed group of the camera lens, and the focal power is positive; the iris diaphragm is located between the first lens group and the second lens group; the second lens group is composed of three lenses and serves as a focusing group of the camera lens, and the focal power is positive; the third lens group is composed of two lenses and serves as a fixed group of the camera lens, and the focal power is negative.

The invention provides an optical lens, which sequentially comprises a first lens with positive focal power from an object side to an imaging surface along an optical axis, a second lens with negative focal power, a third lens with positive focal power and a fourth lens with negative focal power from the object side to the imaging surface, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the third lens has negative focal power; the fourth lens has negative focal power, the object side surface of the fourth lens is a convex surface near the optical axis, and the image side surface of the fourth lens is a concave surface near the optical axis; the fifth lens has positive focal power, the object side surface of the fifth lens is a convex surface near the optical axis, and the image side surface of the fifth lens is a convex surface; the sixth lens has positive focal power; the object side surface of the seventh lens is a concave surface, and the image side surface of the seventh lens is a concave surface near the optical axis; the total optical length TTL of the optical lens and the effective focal length f of the optical lens meet the following conditions: 1.1 lt; tTL / flt; and 1.3. According to the optical lens provided by the invention, through specific surface shape matching and reasonable focal power distribution, the imaging quality of the optical lens can be improved, and the optical lens has the advantage of excellent imaging quality.

The invention relates to the technical field of optical lenses, in particular to a visible light lens. The embodiment of the invention provides a visible light lens which sequentially comprises a first positive lens, a second positive lens, a third negative lens, a fourth negative lens, a fifth positive lens, a sixth positive lens, a seventh positive lens and an eighth negative lens in the light incidence direction, the second positive lens and the third negative lens are attached to form a first doublet lens, and the fifth positive lens and the sixth negative lens are attached to form a second doublet lens. The fourth negative lens and the fifth positive lens are attached to form a second doublet lens, the seventh positive lens and the eighth negative lens are attached to form a third doublet lens, and the other lenses are mutually spaced. The embodiment of the invention provides a visible light lens which is large in relative aperture, low in distortion and high in resolution.

The invention provides an optical lens, which sequentially comprises a first lens with negative focal power from an object side to an imaging surface along an optical axis, a second lens with negative focal power, a third lens with positive focal power and a fourth lens with negative focal power from the object side to the imaging surface, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a plane; the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface; the fifth lens has negative focal power, and the image side surface of the fifth lens is a concave surface; the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a convex surface; the object side surface of the seventh lens is a convex surface near the optical axis, and the image side surface of the seventh lens is a concave surface near the optical axis; and the object side surface of the eighth lens is a convex surface in a paraxial position, and the image side surface of the eighth lens is a concave surface in a paraxial position. According to the optical lens provided by the invention, the imaging quality of the optical lens can be improved, the aberration is reduced, and the imaging quality of the optical lens is improved.

The invention discloses an optical lens and electronic equipment. The optical lens sequentially comprises a first lens to a sixth lens from a first side to a second side along an optical axis. Wherein the focal power of the first lens is negative, and the focal power of the third lens is positive. The second side surface of the first lens is a concave surface; the first side surface of the second lens is a concave surface, and the second side surface is a convex surface; the first side surface of the third lens is a convex surface; the second 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 positive and negative attributes of the symbols of the focal power of the fourth lens and the fifth lens are opposite. The optical lens satisfies 1.5 < = TTL / F < = 2.8, 0.25 < = F3 / F < = 1.7, d56 / TTL < = 0.025, 0.225 < = (d8 + d9) / TTL < = 0.4, and R5 / R6 < = 2.

According to the multi-object-distance, low-distortion and high-definition machine vision lens and the camera device provided by the invention, the lens comprises an optical system, and the optical system comprises a first lens group, an aperture diaphragm and a second lens group which are arranged on the same optical axis from an object space to an image space; the first lens group comprises a first lens, a second lens, a third lens and a fourth lens which are arranged on the same optical axis from the object side to the image side, and the second lens group comprises a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens which are arranged on the same optical axis from the object side to the image side. According to the invention, the imaging effects of high image quality, high accuracy and low distortion can be presented under the condition of satisfying multiple object distances.

The invention relates to an optical imaging lens comprising a liquid lens. The optical imaging lens comprises a first lens to a fifth lens, the liquid lens and a sixth lens to a ninth lens, the first lens has a positive refractive index, and the object side surface is a convex surface. The second lens has a negative refractive index, an object side surface is a convex surface, and an image side surface is a concave surface; the third lens has a negative refractive index, the object side surface is a concave surface, and the image side surface is a concave surface; the fourth lens has a positive refractive index, the object side surface is a concave surface, and the image side surface is a convex surface; the fifth lens has a positive refractive index, and the object side surface is a convex surface; the sixth lens has a positive refractive index, and the image side surface is a convex surface; the seventh lens has a negative refractive index, and the object side surface is a concave surface; the eighth lens has a positive refractive index, and the image side surface is a convex surface; the ninth lens has a positive refractive index, and the object side surface is a convex surface; the sixth lens and the seventh lens are glued to each other. The optical imaging lens can realize a rapid focusing function and is long in service life.

The invention provides a projection lens, which comprises seven lenses from a projection surface to an image source surface along an optical axis: a first lens with negative focal power, a second lens with negative focal power, a third lens with negative focal power, a fourth lens with negative focal power and a fifth lens with negative focal power, the surface of the projection side of the second lens is a concave surface, and the surface of the image source side of the second lens is a convex surface; the surface of the projection side of the third lens is a convex surface, and the surface of the image source side of the third lens is a concave surface; the surface of the projection side of the fourth lens is a convex surface, and the surface of the image source side of the fourth lens is a concave surface; the surface of the image source side of the fifth lens is a concave surface; the surface of the projection side and the surface of the image source side of the sixth lens are convex surfaces; and the seventh lens has positive focal power, and the image source side surface of the seventh lens is a convex surface. According to the projection lens provided by the invention, the projection quality of the projection lens is improved through the reasonable configuration of the surface types of the lenses and the reasonable matching of the focal power.

The invention provides an optical lens, which sequentially comprises a first lens with positive focal power from an object side to an imaging surface along an optical axis, a second lens with negative focal power and a third lens with positive focal power from the object side to the imaging surface, the object side surface of the second lens is a concave surface; the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface; the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; the fifth lens has positive focal power, and the object side surface of the fifth lens is a convex surface; the sixth lens has negative focal power, and the object side surface of the sixth lens is a concave surface; and the seventh lens has negative focal power, and the image side surface of the seventh lens is a concave surface near the optical axis. According to the optical lens provided by the invention, through specific surface shape matching and reasonable focal power distribution, the imaging quality of the optical lens can be improved, and the optical lens has the advantage of excellent imaging quality.

The invention provides an optical lens, which sequentially comprises a first lens with negative focal power from an object side to an imaging surface along an optical axis, a second lens with negative focal power, a third lens with positive focal power and a fourth lens with negative focal power from the object side to the imaging surface, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the third lens has positive focal power, and the image side surface of the third lens is a convex surface; the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface; the object side surface of the fifth lens is a concave surface, and the image side surface of the fifth lens near the optical axis is a convex surface; the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a convex surface; and the seventh lens has positive focal power. According to the optical lens provided by the invention, the imaging quality of the optical lens can be improved, the aberration is reduced, and the imaging quality of the optical lens is improved.

The invention provides an optical lens, which comprises six lenses from an object side to an imaging surface along an optical axis: a first lens with negative focal power; the second lens has negative focal power; the third lens has positive focal power, and the image side surface of the third lens is a convex surface; the fourth lens has positive focal power, and the object side surface of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface; and the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a convex surface. According to the optical lens provided by the invention, the six lenses with specific focal power are adopted, and through specific surface shape matching and reasonable focal power distribution, the imaging quality of the optical lens can be improved, the aberration can be reduced, the imaging quality of the optical lens can be improved, and the lens has one or more advantages of large target surface, large aperture, high imaging quality and the like.

The utility model discloses an optical imaging lens group, a scanning display device and application, and relates to the technical field of scanning display. The optical imaging lens group provided by the utility model comprises a plurality of spherical lenses which are sequentially arranged along the same optical axis from the second side to the first side, the aberration in the imaging process can be greatly reduced, and in addition, the full-spherical optical imaging lens group adopting the projection objective lens structure meets the requirements of large view field, small distortion and high resolution, and also considers small size and light weight.