30results about How to "Correct higher order aberrations" patented technology

This invention provides an optical image lens assembly in order from an object side to an image side comprising: a first lens group that has a first lens element with positive refractive power; a second lens group that has a second lens element with negative refractive power; and a third lens group that has at least three lens elements with refractive power; wherein a lens element in the third lens group closest to an image plane has negative refractive power and a concave image-side surface; wherein while a distance between an imaged object and the optical image lens assembly changes from far to near, focusing is performed by moving the second lens group along the optical axis toward the image plane. By such arrangement and focusing adjustment method, good image quality is achieved and less power is consumed.

This invention provides an image pick-up optical lens assembly comprising, in order from an object side to an image side: a first lens element with positive refractive power having a convex object-side surface and a convex image-side surface; a second lens element with negative refractive power having a concave object-side surface and a convex image-side surface; a third lens element with positive refractive power having an object-side surface and a convex image-side surface, at least one of the surfaces thereof being aspheric; and a fourth lens element with negative refractive power having a convex object-side surface and a concave image-side surface, at least one of the surfaces thereof being aspheric. The image pick-up optical lens assembly further comprises an aperture stop disposed between an object and the first lens element. Such arrangement facilitates a significant reduction in size and sensitivity of the lens assembly while providing superb image quality with higher resolution.

The utility model discloses a photographic lens system. The photographic lens system comprises a first lens with positive refracting power, a second lens with negative refracting power and a third lens with the negative refracting power along the object side to the image side of an optical axis in sequence, wherein both the object side surface and the image side surface of the first lens are convex surfaces and non-spherical surfaces. Through the first lens with double convex surfaces, the configuration of the refracting power of the first lens can be reinforced effectively, the optical total length of the photographic lens system can be shortened, the spherical aberration can be modified and high imaging quality can be achieved.

An imaging optical lens assembly includes seven lens elements which are, in order from an object side to an image side along an optical path: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. The third lens element with positive refractive power has an image-side surface being convex in a paraxial region thereof. The fourth lens element has negative refractive power. The fifth lens element has an object-side surface being concave in a paraxial region thereof. The sixth lens element with negative refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof, and the image-side surface of the sixth lens element has at least one critical point in an off-axis region thereof. When specific conditions are met, the optical lens group for image capturing can simultaneously meet the requirements of miniaturization and wide viewing angle. The invention further discloses an image capturing device with the optical lens assembly for image capturing and an electronic device with the image capturing device.

The device is mainly composed of reflecting telescope system, beam splitter, variable density attenuation disc, high voltage amplifier, CCD camera, data acquisition system, industrial control computer, and software control system based on genetic algorithm. Using secondary mirror of the reflecting telescope being as wave front phase corrector, the invention can adjust alignment between primary mirror and secondary mirror of the reflecting telescope automatically under condition of not introducing additional part of aberrational correction. The invention can corrects static and quasi-static aberration of the reflecting telescope as well as aberration brought by each optical part self in selfadaption. Advantage are: compact structure, simple control, and easy of implementation. The invention reduces system error of reflecting telescope imaging greatly, raises imaging capability of the telescope.

The invention discloses an optical photographic system, which comprises four lenses with refracting power, sequentially comprising a first lens, a second lens with a positive refracting power, a third lens with a negative refracting power and a forth lens with a positive refracting power from the object side to the image side, wherein at least one of an object side surface and an image side surface of the second lens is an aspheric surface; an object side surface of the third lens is a concave surface; an image side surface of the third lens is a convex surface; the object side surface and the image side surface of the third lens are aspheric surfaces respectively; an object side surface and an image side surface of the fourth lens are aspheric surfaces respectively; and the optical photographic system also comprises an aperture which is arranged between an photographed object and the second lens. In the configuration mode of the lens group, the total length of the lenses can be effectively shortened, a wider viewing angle is provided and favorable imaging quality can be obtained.

The invention discloses an optical imaging lens group, comprising five lenses of refractive power which consist of a first lens, a second lens, a third lens, a fourth lens and a fifth lens in sequence from an object side to an image side, wherein the first lens has positive refractive power, and the surface of the object side of the first lens adopts a convex surface; the second lens has negative refractive power; the third lens has negative refractive power; the fourth lens has negative refractive power, and at least one of the surfaces of the object side and the image side of the fourth lens adopts a non-spherical surface; and the surface of the image side of the fifth lens adopts a concave surface, at least one of the surfaces of the object side and the image side of the fifth lens adopts the non-spherical surface, and the fifth lens is made of plastic. With the configuration mode of the optical imaging lens group, the sensitivity of the optical system and the lens size can be reduced, aberration and astigmatism of the system can be effectively corrected, and resolving power with high quality can be obtained.

The invention discloses a capturing optical lens sequentially comprising a first lens, a second lens, a third lens and a fourth lens from an object side to an image side, wherein the first lens has a positive 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 convex surface; the second lens has a negative refractive power, and the object side surface of the third lens is a concave surface; the third lens has a positive refractive power, the image side surface of the first lens is a convex surface, and at least oneof the object side surface and the image side surface of the third lens is an aspheric surface; and the fourth lens has a negative refractive power, the object side surface of the fourth lens is a convex surface, the image side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is provided with at least one inflexion point. Only four lenses with the refractive powers are arranged in the capturing optical lens; the capturing optical lens is provided with an aperture and an electronic photosensitive device, a distance from the aperture to the electronic photosensitive device on an optical axis is SL, a distance from the object side surface of the first lens to the electronic photosensitive device on the optical axis is TTL, and the distances satisfy a relation of 0.75<SL / TTL<0.90. Through the arrangement mode of the lens group, the lens size can be effectively reduced, the sensitiveness of an optical system is reduced, and a higher resolution power can be obtained.

An optical lens system for image taking includes, in order from an object side to an image side, a first lens element with positive refractive power having a convex object-side surface, a second lens element with negative refractive power having a concave object-side surface and a concave image-side surface with the at least one surface being aspheric, and a third lens element with positive refractive power having a convex object-side surface and a concave image-side surface with the at least one surface being aspheric. The image-side surface of the third lens element includes at least one inflection point. By adjusting spacing between any two lens elements, the optical lens system for image taking has a desirable space allocation and can effectively correct the Petzval Sum in order to obtain superior imaging quality.

The invention discloses an optical lens group for shooting, an image capturing device and an electronic device. The optical lens group for shooting sequentially comprises a first lens, a second lens,a third lens, a fourth lens, a fifth lens and a sixth lens from an object side to an image side, wherein the first lens has positive refraction power, and the object side surface of the first lens isa convex surface at the position near optical axis; the object side surface of the third lens is a convex surface at the position near optical axis, and the image side surface of the third lens is a concave surface at the position near optical axis; the fourth lens has negative refraction power, and the object side surface of the fourth lens is a concave surface at the position near optical axis;the image side surface of the fifth lens is a concave surface at the position near optical axis; and the object side surface of the sixth lens is a convex surface at the position near optical axis, the image side surface of the sixth lens is a concave surface at the position near optical axis, the image side surface of the sixth lens is provided with at least one convex surface at the position offoptical axis, and the object side surface and image side surface of the sixth lens are both aspheric surfaces. The total number of lens of the optical lens group for shooting is six. The invention further discloses the image capturing device having the optical lens group for shooting and the electronic device having the image capturing device.

The invention provides a solar grating spectrum imaging device capable of correcting system aberration. On the premise that cost and system complexity are not increased evidently, an adaptive optical system with double wavefront detectors is formed by an adaptive optical system integrated in a telescope system and a wavefront detector arranged at a conjugation position of a focal surface of a spectrograph system. Therefore, the solar grating spectrum imaging device is not only capable of correcting dynamic wavefront aberration but also capable of correcting static aberration of the whole optical system to give great significance to improvement of spectral imaging quality of the spectrum imaging device.

The invention discloses an optical lens group. The optical lens group sequentially comprises a fist lens of positive inflective power, a second lens of positive inflective power, a third lens of negative inflective power and a fourth lens of positive inflective power from an object side to an image side, wherein the object side surface of the third lens is a concave surface, the image side surface of the third lens is a convex surface, and at least one of the object side surface and the image side surface is an aspheric surface; the object side surface and the image side surface of the fourth lens are both aspheric surfaces; and the four lenses with inflective power are provided in the optical lens group.

A device that uses a deformable mirror to realize automatic beam shaping, consisting of a laser, a telescope, a deformable mirror, a CCD camera, a D / A conversion card, a high-voltage amplifier, a variable density attenuation disk, a main control computer, an image acquisition card, a focusing lens, and a genetic control Algorithm composition, the present invention uses the genetic algorithm to control the deformable mirror, by changing the phase distribution of the near-field wave surface of the laser beam, so as to achieve the purpose of changing the shape of the far-field spot, without calculating the relationship between the far-field spot shape and the near-field phase Under the premise of the formula, laser beam shaping can be realized; not only can the Gaussian laser beam be shaped into super-Gaussian beam, square beam, etc. Correction. The invention has the advantages of simple structure, strong versatility and easy realization, can be applied to occasions with specific requirements on the shape of the laser beam, and can greatly expand the application field of the laser.