Abstract: An optical system, a lens module, and a terminal device are provided. The optical system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens with a positive refractive power has an object-side surface which is convex at an optical axis. The second lens with a negative refractive power has an image-side surface which is concave at the optical axis. The third lens with a negative refractive power has an object-side surface which is convex at the optical axis and an image-side surface which is concave at the optical axis. The fourth lens with a negative refractive power has an image-side surface which is concave at the optical axis. The fifth lens and the sixth lens have the refractive power. The optical system satisfies expression 1<ftLtl4/ftGtl4<1.5.

Abstract: An optical system, a lens module, and a terminal device are provided. The optical system includes a first lens with a positive refractive power, a second lens with a refractive power, a third lens with a refractive power, a fourth lens with a positive refractive power, and a fifth lens with a refractive power. The first lens has an object-side surface which is convex at an optical axis. The third lens has an object-side surface which is concave at the optical axis. The fourth lens has an image-side surface which is convex at the optical axis. The fifth lens has an object-side surface which is concave at the optical axis and an image-side surface which is convex at the optical axis. The optical system satisfies the following expression: 0.25<ftgtl3/ftltl3<0.8.

Abstract: An optical system, a lens module, and an electronic device are provide. The optical system includes, in order from an object side to an image side along an optical axis, a first lens with a negative refractive power, a second lens with a positive refractive power, a third lens with a negative refractive power, a fourth lens with a refractive power, a fifth lens with a positive refractive power, and a sixth lens with a negative refractive power. An object-side surface of the fifth lens has at least one inflection point. At least one of an object-side surface and an image-side surface of the sixth lens has at least one inflection point. The optical system satisfies the following expression: ?9<f4/|f1|<3.5.

Abstract: An imaging lens (100). The imaging lens (100) sequentially consists of, from the object side to the image side: a first lens (L1) having refraction power, the object side surface (S1) of the first lens (L1) being a convex surface at the optic axis; a second lens (L2) having refraction power, the object side surface (S3) of the second lens (L2) being a convex surface at the optic axis; and a third lens (L3) having refraction power. The imaging lens (100) satisfies the condition that FNO*L>15.5, wherein FNO represents an f-number of the imaging lens (100), L represents an aperture diameter of the first lens (L1), and the unit of L is mm.

Abstract: An optical system includes: a stop; a first lens having a positive refractive power, an object side surface being convex at a paraxial area; a second lens; a third lens; a fourth lens; a fifth lens; a sixth lens having a positive refractive power, an image side surface being convex at a paraxial area; a seventh lens; and an eighth lens, an image side surface being concave a paraxial area. The optical system satisfies the condition: (MIN6*MAX8/MAX6*MIN8)?2. MIN6 is a minimum thickness of the sixth lens in a direction of an optical axis, MAX6 is a maximum thickness of the sixth lens in the direction of the optical axis, MIN8 is a minimum thickness of the eighth lens in the direction of the optical axis, and MAX8 is a maximum thickness of the eighth lens in the direction of the optical axis.

Abstract: An optical lens assembly, sequentially comprising from an object side to an image side: a first lens; a second lens having positive refractive power, the object side surface of the second lens being concave at the circumference, and the image side surface of the second lens being convex at the circumference; a third lens; and a fourth lens having positive refractive power, the image side surface of the fourth lens being concave at the optical axis, the object side surface and the image side surface of the fourth lens being aspherical, and at least one of the object side surface and the image side surface of the fourth lens having an inflection point. The optical lens assembly satisfies relationship: TT/f<1.3, TT is the distance on the optical axis from the object side surface of the first lens to the image side surface of the fourth lens, and f is effective focal length.

Abstract: An optical system, a lens module, and an electronic device are provided. The optical system includes, 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 with, and a seventh lens. The first lens has an object-side surface which is convex at an optical axis and an image-side surface which is concave at the optical axis and at a circumference. The second lens has an object-side surface which is convex at the optical axis and an image-side surface which is concave at the optical axis and at a circumference. The seventh lens has an image-side surface, which is concave at the optical axis and has at least one inflection point. The optical system satisfies the following expression: f/EPD<1.7.

Abstract: An optical system, a lens module, and an electronic device are provide. The optical system includes, in order from an object side to an image side along an optical axis, a first to seventh lenses. Each of the first lens, the third lens, and the sixth lens has a positive refractive power. Each of the second lens and the seventh lens has a negative refractive power. Each of the second lens, the third lens, and the sixth lens has an object-side surface which is convex near the optical axis. Each of the second lens and the seventh lens has an image-side surface which is concave near the oprtical axis. The third lens has an image-side surface which is convex near a periphery of the image-side surface of the third lens. The seventh lens has an object-side surface which is convex near the optical axis.

Abstract: An optical system, a lens module, and a terminal device are provided. The optical system includes a first lens and a fifth lens, each of which has a positive refractive power. The optical system also includes multiple lenses with refractive powers. Each of the first lens, a second lens, and a seventh lens has an object-side surface which is convex at an optical axis. Each of the third lens and a fifth lens has an image-side surface which is convex at the optical axis. The seventh lens has an image-side surface which is concave at the optical axis. The seventh lens has an inflection point on the object-side surface and/or the image-side surface. The optical system satisfies the expressions tan ?/ƒ>0.21 mm?1 and Y2/Y1+Y3/Y1+Y4/Y1<3.1.

Abstract: An optical system (10) includes, successively from an object side to an image side, a first lens unit (110) having a positive refractive power, a second lens unit (120) having a negative refractive power, a third lens unit (130) and a fourth lens unit (140) having a positive refractive power; the positions of the first lens unit (110) and the fourth lens unit (140) are fixed with respect to the imaging surface (S17) of the optical system (10), and the second lens unit (120) and the third lens unit (130) are movable with respect to the first lens unit (110) in the optical axis direction of the optical system (10); when the optical system is zoomed from the short focal end to the long focal end, a distance between the first lens unit (110) and the second lens unit (120) and the distance between the third lens unit (130) and the fourth lens unit (140) increase.

Abstract: An optical system, a lens module, and an electronic device are provide. The optical system includes, in order from an object side to an image side along an optical axis, a first lens with a positive refractive power, a second lens with a negative refractive power, a third lens with a refractive power, a fourth lens with a refractive power, a fifth lens with a refractive power, a sixth lens with a refractive power, and a seventh lens with a negative refractive power. The optical system further includes a stop, and the optical system satisfies the following expression: 1.5<TTL/D<2.5.

Abstract: An optical system (100), sequentially comprising from an object side to an image side: a first lens (L1) having positive refractive power, an object-side surface (S1) of the first lens (L1) being a convex surface at the circumference; a second lens (L2), a third lens (13), a fourth lens (L4), a fifth lens (L5), a sixth lens (L6), and a seventh lens (L7) having refractive power; and an eighth lens (L8) having negative refractive power. An image-side surface (S14) of the seventh lens (L7) is a concave surface at the optical axis. In addition, the optical system (100) satisfies 1<TTL/<2.5, wherein TTL is the distance between the object-side surface (S1) of the first lens (L1) and an imaging surface (S19) of the optical system (100) on the optical axis. The optical system (100) further comprises a diaphragm (STO), and L is the effective aperture diameter of the diaphragm (STO).

Abstract: Provided is an optical system, sequentially comprising, from an object side to an image side, a first lens having negative refractive power, an object side face of the first lens being convex, and an image side face being concave; a second lens having negative refractive power, an image side face of the second lens being concave; a third lens having positive refractive power, an object side face and an image side face of the third lens each being convex; a fourth lens having positive refractive power, an object side face and an image side face of the fourth lens each being convex; a lens unit having refractive power; and a stop arranged on an object side of the fourth lens. The optical system satisfies the condition of FOV/CRA>10.

Abstract: An optical system, sequentially comprising from an object side to an image side: a first lens having a negative refractive power, an object-side surface of the first lens being a convex surface, and an image-side surface thereof being a concave surface; a second lens having a negative refractive power, an image-side surface of the second lens being a concave surface; a third lens having a positive refractive power; a diaphragm; a fourth lens having a positive refractive power; and a fifth lens having a negative refractive power. The optical system satisfies the following relationship: (SD S2)/(RDY S2)<0.93, wherein SD S2 is the Y-direction half aperture of the image-side surface of the first lens, and RDY S2 is the Y radius of the image-side surface of the first lens.

Abstract: A wide-angle lens, an image capturing device and an electronic device.

Abstract: An optical system includes: a stop; a first lens having a positive refractive power, an object side surface being convex at a paraxial area; a second lens; a third lens; a fourth lens; a fifth lens; a sixth lens having a positive refractive power, an image side surface being convex at a paraxial area; a seventh lens; and an eighth lens, an image side surface) being concave a paraxial area. The optical system satisfies the condition: (MIN6*MAX8/MAX6*MIN8)?2. MIN6 is a minimum thickness of the sixth lens in a direction of an optical axis, MAX6 is a maximum thickness of the sixth lens in the direction of the optical axis, MIN8 is a minimum thickness of the eighth lens in the direction of the optical axis, and MAX8 is a maximum thickness of the eighth lens in the direction of the optical axis.

Abstract: An optical system includes, sequentially along an incident optical path, a lens element including at least one lens and having a positive refractive power, and an optical path adjusting element including an incident surface and at least one effective reflective surface. The incident surface faces an image side of the lens element, and a light beam from the lens element is capable of passing through the incident surface to enter the optical path adjusting element, and is reflected at the effective reflective surface. The optical system satisfies the following condition: SDL/SDF<1.5. SDL is a size of an aperture of an image-side surface of a lens closest to the image side in the lens element, and SDF is a size of an aperture of the incident surface.

Abstract: An optical system, a lens module, and a terminal device are provided. The optical system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens with a positive refractive power has an object-side surface which is convex at an optical axis. The second lens with a negative refractive power has an image-side surface which is concave at the optical axis. The third lens with a negative refractive power has an object-side surface which is convex at the optical axis and an image-side surface which is concave at the optical axis. The fourth lens with a negative refractive power has an image-side surface which is concave at the optical axis. The fifth lens and the sixth lens have the refractive power. The optical system satisfies expression 1<ftLtl4/ftGtl4<1.5.

Abstract: An optical lens assembly, sequentially comprising from an object side to an image side: a first lens; a second lens having positive refractive power, the object side surface of the second lens being concave at the circumference, and the image side surface of the second lens being convex at the circumference; a third lens; and a fourth lens having positive refractive power, the image side surface of the fourth lens being concave at the optical axis, the object side surface and the image side surface of the fourth lens being aspherical, and at least one of the object side surface and the image side surface of the fourth lens having an inflection point. The optical lens assembly satisfies relationship: TT/f<1.3, TT is the distance on the optical axis from the object side surface of the first lens to the image side surface of the fourth lens, and f is effective focal length.

Abstract: An optical system (10) includes, successively from an object side to an image side, a first lens unit (110) having a positive refractive power, a second lens unit (120) having a negative refractive power, a third lens unit (130) and a fourth lens unit (140) having a positive refractive power ; the positions of the first lens unit (110) and the fourth lens unit (140) are fixed with respect to the imaging surface (S17) of the optical system (10), and the second lens unit (120) and the third lens unit (130) are movable with respect to the first lens unit (110) in the optical axis direction of the optical system (10); when the optical system is zoomed from the short focal end to the long focal end, a distance between the first lens unit (110) and the second lens unit (120) and the distance between the third lens unit (130) and the fourth lens unit (140) increase.