An optical image capturing system includes, along the optical axis in order from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. At least one lens among the first to the sixth lenses has positive refractive force. The seventh lens can have negative refractive force, wherein both surfaces thereof are aspheric, and at least one surface thereof has an inflection point. The lenses in the optical image capturing system which have refractive power include the first to the seventh lenses. The optical image capturing system can increase aperture value and improve the imaging quality for use in compact cameras.

A miniature wide-angle imaging lens has a miniaturization ratio, of a total track length from the center of a first surface to a focal plane by an image circle diameter, with a value less than 3.0. The imaging lens includes, starting from an object side of the lens, a first group of at least three optical elements, a second group including an aperture stop and an optical element immediately in front of or behind the aperture stop, and a third group of at least two optical elements.

A miniature wide-angle imaging lens has a miniaturization ratio, of a total track length from the center of a first surface to a focal plane by an image circle diameter, with a value less than 3.0. The imaging lens includes, starting from an object side of the lens, a first group of at least three optical elements, a second group including an aperture stop and an optical element immediately in front of or behind the aperture stop, and a third group of at least two optical elements.

This application discloses an optical lens, an optical module, and an electronic device. The optical lens of this application sequentially includes, from an object side to an image side along an optical axis: a first lens with a negative bending force, where an object side surface of the first lens is convex, and an image side surface of the first lens is concave; a second lens with a positive bending force, where an object side surface of the second lens is convex, and an image side surface of the second lens is concave; a third lens with a positive bending force; a fourth lens with a positive bending force and biconvex surfaces; a fifth lens with a negative bending force and biconcave surfaces; a sixth lens with a positive bending force; and a seventh lens with a negative bending force.

A method, an apparatus, and a device for determining parameters of a fisheye lens are provided. The fisheye lens includes a meta-lens including a first surface and a second surface, and the first and second surfaces are each provided with a plurality of columnar structures. The method includes: obtaining a focal length and a projection mode of a fisheye lens to be designed; determining a light angle offset of each columnar structure based on the focal length and the projection mode; determining a phase distribution of the columnar structure based on the light angle offset of the columnar structure; and determining a size of the columnar structure according to the phase distribution of the columnar structure. The fisheye lens may achieve a relatively large viewing field in a short distance.

A method, an apparatus, and a device for determining parameters of a fisheye lens are provided. The fisheye lens includes a meta-lens including a first surface and a second surface, and the first and second surfaces are each provided with a plurality of columnar structures. The method includes: obtaining a focal length and a projection mode of a fisheye lens to be designed; determining a light angle offset of each columnar structure based on the focal length and the projection mode; determining a phase distribution of the columnar structure based on the light angle offset of the columnar structure; and determining a size of the columnar structure according to the phase distribution of the columnar structure. The fisheye lens may achieve a relatively large viewing field in a short distance.

A wide-angle lens (100) includes a front group (110), an aperture (80), and a rear group (120). The front group (110) includes a first lens (10) and a second lens (20) arranged from a side (La) closest to an object to an image side (Lb). In such a wide-angle lens, to suppress an occurrence of a ghost caused by multiple reflection between a lens surface (102) of the first lens (10) on the image side (Lb) and a lens surface (21) of the second lens (20) on the object side (La), the sag amount Sag21 (mm) and the diameter D21 (mm) of the lens surface (21) satisfy the following conditional expression: 0<|Sag21/(D21/2)|<0.125.

A wide-angle lens (100) includes a front group (110), an aperture (80), and a rear group (120). The front group (110) includes a first lens (10) and a second lens (20) arranged from a side (La) closest to an object to an image side (Lb). In such a wide-angle lens, to suppress an occurrence of a ghost caused by multiple reflection between a lens surface (102) of the first lens (10) on the image side (Lb) and a lens surface (21) of the second lens (20) on the object side (La), the sag amount Sag21 (mm) and the diameter D21 (mm) of the lens surface (21) satisfy the following conditional expression: 0<|Sag21/(D21/2)|<0.125.

The present disclosure relates to a camera optical lens satisfying following conditions: 3.00≤f2/f≤5.00, 13.00≤d5/d6≤25.00, 3.00≤(R5+R6)/(R5−R6)≤10.00, and 5.00≤R3/R4≤50.00; where f denotes an overall focal length of the camera optical lens, f2 denotes a focal length of a second lens, d5 denotes an on-axis thickness of a third lens, d6 denotes an on-axis distance from an image-side surface of the third lens to an object-side surface of a fourth lens, R5 and R6 respectively denote a curvature radius of an object-side surface and the image-side surface of the third lens, and R3 and R4 respectively denote a curvature radius of an object-side surface and an image-side surface of the second lens. The camera optical lens in the present disclosure satisfies a design requirement of large aperture and wide angle while having good optical functions.

Provided is a camera optical lens including, sequentially from an object side to an image side: a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a positive refractive power; and a fourth lens having a negative refractive power. The camera optical lens satisfies following conditions: −0.75≤f1/f2≤−0.67; 0.32≤f4/f2≤0.40; 5.00≤R7/R8≤6.00; and 1.40≤d1/d2≤3.20, where f1, f2, and f4 denote focal lengths of the first, second and fourth lenses, respectively; R7 and R8 denote curvature radiuses of an object side surface and an image side surface of the fourth lens, respectively; d1 denotes an on-axis thickness of the first lens; and d2 denotes an on-axis distance from an image side surface of the first lens to an object side surface of the second lens. The camera optical lens can achieve high optical performance while satisfying design requirements for ultra-thin, wide-angle lenses.