13results about How to "Corrected astigmatism" patented technology

The present disclosure discloses an image capturing lens assembly including seven lens elements including 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 in order from an object side to an image side along an optical path. Each of the seven lenses has an object-side surface facing the object-side direction and an image-side surface facing the image-side direction. The first lens element has negative refractive power. The fifth lens element has an image-side surface being convex in a paraxial region thereof. The sixth lens element has negative refractive power. The sixth lens element has an object-side surface being concave in a paraxial region thereof. At least one of the object side surface and the image side surface of at least one of the seven lenses has at least one inflection point. When specific conditions are met, the image capturing lens assembly can simultaneously meet the requirements of miniaturization, large viewing angle, low sensitivity and high imaging quality. The invention further discloses an image capturing device with the image capturing lens assembly and an electronic device with the image capturing device.

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 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 optical lens, an image capturing module and a terminal device, the optical lens comprises seven lenses with refractive power, the first lens has negative refractive power, the object side surface is a convex surface, and the image side surface 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 concave image-side surface, respectively. The fourth lens element with positive refractive power has a convex object-side surface and a convex image-side surface. The fifth lens element with refractive power has a convex object-side surface and a convex image-side surface. The sixth lens has negative refractive power, the object side surface and the image side surface are both concave surfaces, the seventh lens has positive refractive power, and the object side surface and the image side surface are respectively a convex surface and a concave surface; the optical lens satisfies the following relational expressions: FOV is greater than or equal to 130 deg and less than or equal to 140 deg, and TTL / IMGH is greater than or equal to 7.1 and less than or equal to 7.9. According to the optical lens, the image capturing module and the terminal equipment, the miniaturization design of the optical lens can be met, meanwhile, the large field angle can be achieved, and meanwhile the imaging quality can be improved.

The utility model discloses a peripheral out-of-focus lens capable of inhibiting astigmatism development, which comprises a substrate and a micro-structure lens array regularly distributed on the substrate, the substrate comprises a front type A and a rear type B, the micro-structure lens array is positioned on the front type A, the micro-structure lens array is formed by regular micro-lens monomers with the same structure, and the micro-lens monomers are positioned on the rear type B; the long axis directions of the regular micro lens monomers are the same; an included angle is formed between the astigmatism direction generated by the micro-structure lens array and the astigmatism direction of the rear type B; the utility model has the beneficial effects that vision and astigmatism can be corrected through the substrate and the regularly distributed micro-structure lens array, and meanwhile, peripheral defocus and astigmatism defocus are generated by utilizing the micro-structure lens array, so that sufficient defocus signal stimulation can be formed at the periphery of the retina of a wearer, and vision management is optimized; by controlling the included angle between the astigmatism direction of the microstructure lens array and the astigmatism direction of the substrate, astigmatism management is further optimized, and the problem that astigmatism degrees of a wearer are deepened can be avoided.

This application relates to a femtosecond laser multi-degree-of-freedom personalized reshaping method and system for intracorneal implants, belonging to the field of femtosecond laser processing technology. Utilizing the cold processing characteristics of femtosecond lasers, the intracorneal implant is individually cut and ablated to obtain the desired three-dimensional corneal shape, precisely shaping the curvature, thickness, and contour of the lens to perfectly match the patient's corneal capsule or lesion area. By leveraging the nonlinear optical effect induced at the focal point of the femtosecond laser, the stromal collagen network in the weak areas corresponding to corneal expansion can be densified through laser processing, significantly improving the local elastic modulus and resistance to deformation. In areas requiring a smooth transition with the recipient cornea or adjustment of refractive power, controllable micropores or low-density areas can be induced, appropriately reducing local stiffness, thereby achieving a spatial gradient distribution of internal mechanical properties and customizing the overall mechanical behavior and morphological stability after implantation.

This invention provides a projection lens. The projection lens includes a lens group comprising at least eight lenses, which, from a first side to a second side, are sequentially: a first lens with negative optical power, a second lens with negative optical power, a third lens with positive optical power, a fourth lens with negative optical power, a fifth lens with positive optical power, a sixth lens with optical power, a seventh lens with optical power, and an eighth lens with optical power. At least one group of lenses from the fourth to the eighth lens is cemented together to form a cemented doublet lens or a cemented triplet lens. The ratio between the combined focal length of the cemented doublet lens and the focal length of the second lens group is greater than or equal to 1 and less than or equal to 8; or, the ratio between the focal length of the cemented triplet lens and the focal length of the second lens group is greater than or equal to 0 and less than or equal to 14. This invention solves the problem in existing projection lenses where it is difficult to simultaneously achieve both high-quality projection and miniaturization.

The invention relates to the technical field of optical imaging systems, and discloses a small long-focus projection imaging system which comprises a light valve, a prism, an image bias lens and a projection lens. The projection lens is sequentially provided with a rear lens group and a front lens group on the same optical axis from light incidence to light emergence, the rear lens group comprises a first lens with positive focal power which is a glass aspheric lens, a second lens with positive focal power which is a glass spherical lens, a third lens with negative focal power which is a glass spherical lens, and a fourth lens with negative focal power which is a glass spherical lens. The front lens group comprises a fourth lens which has positive focal power and is a glass spherical lens, and a fifth lens which has negative focal power and is a plastic aspheric lens; a diaphragm is arranged between the front lens group and the rear lens group; the second lens and the third lens are combined into a doublet lens; the aspheric lens is adopted to optimize the exit pupil position of the lens and correct distortion and astigmatism, meanwhile, a compact structure is adopted, the manufacturing cost of the lens is reduced, and the size of the lens is successfully reduced.

The embodiment of the invention relates to the technical field of optics, and discloses a camera shooting optical lens which comprises six lenses which are sequentially a first lens with negative refraction power, a second lens with positive refraction power, a third lens with positive refraction power and a fourth lens with negative refraction power from an object side to an image side, a fifth lens element with positive refractive power; and a sixth lens element with negative refractive power. Through the configuration mode of the lenses, the shooting optical lens has the advantages of being large in aperture, wide in angle, ultrathin and good in optical performance, the total optical length of the shooting optical lens can be controlled, the focal length of the lens is reasonably distributed, the deflection degree of light passing through the lens is relieved, astigmatism and distortion are effectively corrected, chromatic aberration is corrected, aberration is reduced, and the imaging effect is improved.

The embodiment of the invention discloses an ultraviolet ultrafast laser telecentric lens group and laser processing equipment, the ultraviolet ultrafast laser telecentric lens group comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged along the incident direction of light, the first lens is a biconvex positive lens, the second lens is a biconcave negative lens, and the fifth lens is a biconvex negative lens. The third lens is a negative meniscus lens, the fourth lens is a positive meniscus lens, and the fifth lens is a biconvex positive lens. According to the ultraviolet ultrafast laser telecentric lens group, an exit pupil is located at the infinite position of an image space, main light rays of a focused light beam are perpendicular to a focal plane under the condition of any full field angle, perforation inclination is avoided, astigmatism and distortion of the laser telecentric lens group are effectively corrected, an image space telecentric light path is achieved, and the imaging quality is improved. In addition, the lens is simple in structure and convenient to design, and can be widely applied to various fine laser processing devices.

The invention discloses an optical image lens system group, which comprises six lens elements, namely a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element, which are sequentially arranged from an object side to an image side along an optical path. Each of the six lenses has an object-side surface facing the object-side direction and an image-side surface facing the image-side direction. The first lens element has positive refractive power. The fourth lens element has positive refractive power. The fourth lens element has an image-side surface being convex in a paraxial region thereof. The fifth lens element has an image-side surface being concave in a paraxial region thereof. The sixth lens element has negative refractive power. The sixth lens element has an object-side surface being convex in a paraxial region thereof. When specific conditions are met, the optical image lens system group can meet the requirements of miniaturization and high imaging quality at the same time. The invention further discloses an image capturing device with the optical image lens system and an electronic device with the image capturing device.

The present invention discloses an optical lens, a camera module and an electronic device, wherein the optical lens comprises a first lens having a positive refractive power arranged in sequence from the object side to the image side, wherein the object side surface and the image side surface are convex and concave respectively; a second lens having a refractive power, wherein the image side surface is concave; a third lens having a refractive power; a fourth lens having a refractive power, wherein the object side surface and the image side surface are concave and convex respectively; a fifth lens having a positive refractive power, wherein the object side surface and the image side surface are concave and convex respectively; a sixth lens having a negative refractive power, wherein the object side surface and the image side surface are both concave; and 1.45mm≤Imgh / Fno<1.55mm is satisfied, wherein Imgh is the radius of the maximum effective imaging circle of the optical lens, and Fno is the aperture number of the optical lens. The optical lens, the camera module and the electronic device provided by the present invention can realize the miniaturization of the optical lens, and can also realize the characteristics of large aperture and large image surface, and can improve the imaging clarity in a dark environment.

This invention provides an optical lens and an electronic device having the same. The optical lens includes: a first lens with negative optical power, having a first convex side and a second concave side; a second lens with negative optical power, having a first concave side and a second convex side; a third lens with positive optical power, having a first convex side and a second convex side; a fourth lens with positive optical power, having a first convex side and a second convex side; a fifth lens with negative optical power, a sixth lens with positive optical power, and a seventh lens with negative optical power; or a fifth lens with positive optical power, a sixth lens with negative optical power, and a seventh lens with positive optical power; satisfying: (FOV×F) / H≥95. This invention solves at least one of the problems in existing optical lenses: the inability to simultaneously achieve miniaturization and high resolution, pixel differences, poor image quality in low-light environments, and the inability to match the center angular resolution with higher pixel chips while satisfying a large field of view.