299results about How to "High image quality" 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 discloses a digital twin pumped storage power station three-dimensional real-time modeling fusion method which comprises the following steps: (1) obtaining three-dimensional modeling basic image data through a video monitoring system, and constructing a three-dimensional modeling basic image database; (2) performing real-time three-dimensional modeling and model fusion; and (3) system integration and real-time updating. According to the invention, deep learning is utilized to improve the image quality of a video monitoring system, and the precision of a three-dimensional model in a digital twin system can be improved; and new equipment in the image is identified by combining deep learning, real-time modeling of single equipment is completed on the premise of not increasing the model acquisition cost, and low cost, simplification and intelligentization of refined three-dimensional real-time modeling are realized.

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 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 convex surface, and the image side surface of the third lens near the optical axis is a concave surface; the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens near the optical axis is a convex surface; the fifth lens has negative 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 concave surface near the optical axis; the sixth lens has positive focal power, the object side surface of the sixth lens near the optical axis is a convex 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. The optical lens provided by the invention has one or more advantages of long focus characteristic, large target surface, large aperture, high pixel and the like.

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 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 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 invention discloses a display device which comprises a plurality of light-emitting units which are arranged adjacent to each other, and each light-emitting unit comprises a plurality of pixels. Each of the plurality of pixels comprises a plurality of sub-pixels, the plurality of sub-pixels are arranged in an L shape, and two sides of each pixel are substantially parallel to two sides of the corresponding light-emitting unit. The plurality of light-emitting units comprise first light-emitting units and second light-emitting units which are adjacent to each other, each first light-emitting unit is provided with a plurality of first pixels, each second light-emitting unit is provided with a plurality of second pixels, and the plurality of first pixels and the plurality of second pixels are in central symmetry.

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 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 discloses a camera shooting optical lens. The camera shooting optical lens is composed of a first prism with positive refraction power, a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged from the object side to the image side. A reflecting surface is arranged between the object side surface and the image side surface of the first prism, the first lens, the second lens and the third lens form a first lens group, the fourth lens and the fifth lens form a second lens group, and the second lens group can be movably adjusted along the optical axis of the shooting optical lens, so that the shooting optical lens is switched between a first state and a second state. Wherein the focal length of the shooting optical lens in the first state is maximum, and the focal length of the shooting optical lens in the second state is minimum; the focal length of the shooting optical lens in the first state is fA, the image height of the shooting optical lens is IH, and the following relational expression is satisfied: fA / IH is greater than or equal to 4.00 and less than or equal to 4.80. The shooting optical lens can realize large-aperture periscopic design, and has good optical performance.

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 discloses a camera shooting optical lens. The camera shooting optical lens is composed of a first prism with positive refraction power, a first lens with negative refraction power, a second lens with positive refraction power, a third lens, a fourth lens and a fifth lens which are sequentially arranged from the object side to the image side. A reflecting surface is arranged between the object side surface and the image side surface of the first prism, the first lens, the second lens and the third lens form a first lens group, the fourth lens and the fifth lens form a second lens group, and the first lens group can be movably adjusted along the optical axis of the camera optical lens, so that the camera optical lens is switched between a first state and a second state. Wherein the focal length of the shooting optical lens in the first state is fA, the image height of the shooting optical lens is IH, and the following relational expression is satisfied: fA / IH is more than or equal to 4.00 and less than or equal to 5.50. The shooting optical lens can realize large-aperture periscopic design, and has good optical performance.

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.

An optical lens, a camera module and a terminal device are provided, the optical lens has six lenses with refractive power, the six lenses comprise a first lens to a sixth lens in sequence from an object side to an image side along an optical axis, the refractive power of the first lens is negative, negative, positive, negative, positive and negative, and the object side surface and the image side surface of the first lens are a convex surface and a concave surface near the optical axis respectively; the object-side surface and the image-side surface of the second lens element are respectively a concave surface and a convex surface near the optical axis; the object side surface and the image side surface of the third lens are convex surfaces near the optical axis; the fourth lens element has a convex object-side surface and a concave image-side surface in paraxial regions, respectively; the fifth lens element has an object-side surface and an image-side surface being convex in a paraxial region. The sixth lens element has a concave image-side surface in a paraxial region. The seventh lens element has a convex object-side surface and a concave image-side surface in paraxial regions, respectively. The optical lens satisfies the following relational expressions: 65 degree lt; a FOVlt; the angle is 75 degrees, and the tilt is 3.5 degrees; tTL / Hlt; 4.2. The optical lens provided by the invention can realize miniaturization and has the characteristic of a large field angle.

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 discloses an optical lens, a camera module and a terminal device, the optical lens comprises seven lenses, the first lens has negative refractive power, and the object side surface and the image side surface of the first lens are a convex surface and a concave surface near an optical axis respectively; the second lens element with negative refractive power has a concave object-side surface and a convex image-side surface in paraxial regions, respectively. The third lens element with positive refractive power has an object-side surface and an image-side surface being convex in a paraxial region. The fourth lens element with positive refractive power has an object-side surface and an image-side surface being convex in a paraxial region thereof. The fifth lens element with positive refractive power has an object-side surface and an image-side surface being convex in a paraxial region. The sixth lens element with negative refractive power has an object-side surface and an image-side surface being concave in a paraxial region. The seventh lens element with positive refractive power has a convex object-side surface and a concave image-side surface in paraxial regions, respectively. The optical lens satisfies the following relational expressions: FOV is greater than or equal to 130 degrees and less than or equal to 160 degrees, and R6 / F3 is greater than or equal to-7.5 and less than or equal to-3.0.

The invention discloses an imaging lens group and a camera module, and the imaging lens group comprises a diaphragm, and sequentially comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object side to an image side. A second lens element; a third lens element; a fourth lens element; a fifth lens element; and a sixth lens element. Wherein the refractive index of the third lens is nd3, the thickness of the third lens on the optical axis is CT3, the incident pupil diameter of the imaging lens group is EPD, and the following condition is satisfied: (nd3 * CT3) / EPD is more than 2.64 and less than 4.55.

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 invention provides an optical system. The optical system comprises a lens barrel, a lens group and at least one spacer, the lens group and the spacer are arranged in the lens barrel, the lens group is composed of five lenses, and the five lenses are the first lens, the second lens, the third lens, the fourth lens and the fifth lens; the at least one distance piece comprises a second distance piece, a third distance piece and a fourth distance piece; f3 / (EP2 + CT3) is greater than or equal to-3.23 and less than or equal to-3.05; f4 / EP34 is more than or equal to-17.45 and less than or equal to-13.71. The problem that a five-piece optical system in the prior art meets the requirement for imaging size control, and consequently the assembling stability is poor is solved.

The long-wave infrared athermalization wide-angle temperature measurement lens comprises a first lens, a second lens, a third lens, a diaphragm STOP, a fourth lens and an optical filter which are sequentially connected along an optical axis from an object side to an image side in an optical path mode. The object-side surface of the first lens is a convex surface, and the image-side surface is a concave surface. The object side surface of the second lens is a convex surface, and the image side surface is a concave surface; the object side surface of the third lens is a concave surface, and the image side surface is a convex surface; the fourth lens element has a convex object-side surface and a convex image-side surface. By adopting the optimized first to fourth lenses, the number of used lenses is reduced, the cost is reduced, the horizontal visual angle is ensured to reach 90 degrees, and the number of apertures is less than or equal to 1.0. In addition, the total optical length is smaller than or equal to 50 mm, the structure is designed to be light, and the purpose of miniaturization is achieved. Meanwhile, the advantages of optical athermalization and active and passive focusing compensation of an electric tuning system are utilized, and high imaging quality is obtained under the complex environment temperature.

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 concave 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 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 a projection lens, which comprises five lenses from a projection surface to an image source surface along an optical axis in sequence: a first lens with positive focal power, a second lens with negative focal power, a third lens with positive focal power and a fourth lens with negative focal power, 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 projection side surface and the image source side surface of the third lens are concave surfaces; the projection side surface and the image source side surface of the fourth lens are convex surfaces; the surface of the image source side of the fifth lens is a convex surface; wherein the maximum field angle FOV of the projection lens and the aperture value Fno of the projection lens meet the following conditions: 17.5 degree lt; an FOV / Fnot; 23.5 DEG C; the curvature radius R2 of the surface of the image source side of the first lens and the effective focal length f of the projection lens meet the following conditions:-1.4 lt; r2 / flt; and-0.4. Through reasonable configuration of the surface types of the lenses and reasonable matching of the focal power, the imaging quality of the projection lens is improved, the aberration is reduced, and the projection quality of the projection lens is improved.

The invention provides an optical lens, which comprises six lenses which sequentially comprise 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, a fifth lens with positive focal power and a sixth lens with negative focal power from an object side to an imaging surface 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 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 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 present invention provides an optical lens, which includes, from the object side to the imaging surface along the optical axis, a first lens with negative optical power, whose object side surface is convex and whose image side surface is concave; a second lens with optical power, whose object side surface is convex and whose image side surface is concave; a third lens with positive optical power, whose object side surface is concave and whose image side surface is convex; a fourth lens with negative optical power, whose object side surface is convex and whose image side surface is concave; a fifth lens with positive optical power, whose object side surface is convex and whose image side surface is convex; a sixth lens with optical power, whose object side surface is concave and whose image side surface is convex; a seventh lens with negative optical power, whose object side surface is convex and whose image side surface is concave near the optical axis. The optical lens of the present invention has one or more advantages such as a large field of view, large target surface imaging, and high imaging quality.

The invention discloses a high-resolution semiconductor package internal defect detection device, which belongs to the technical field of semiconductor detection, and is characterized in that a feeding and discharging mechanism is arranged on the outer side of a detection box body, a driving mechanism is arranged on one side of a base, and a plurality of placing grooves for placing semiconductor packages are formed in a carrier disc; a clamping mechanism used for clamping a plurality of semiconductor packages is arranged on the carrier disc, a light source sleeve used for fixing and clamping a light source is arranged on the fifth supporting plate, a camera is arranged on the sixth supporting plate, and the camera is located on the upper side of the semiconductor packages. The driving mechanism drives the carrier disc to move to the position below the light source in the detection box body, detection is carried out in the detection box body, interference of other light rays is avoided, and under cooperation of the light source, the camera collects multi-angle images of semiconductor packaging on the carrier disc; and the image acquisition system and the image processing system are used for acquiring and analyzing the pictures at different irradiation angles, so that the internal defects of the semiconductor package are automatically detected, and the detection accuracy can be improved.