Abstract: An optical device for aberration correction (e.g., chromatic aberration correction) is disclosed. The optical device includes an optical component (e.g., a spherical lens) and a metasurface optically coupled to the optical component. The metasurface includes a plurality of nanostructures that define a phase profile. The phase profile corrects an aberration (e.g., chromatic aberration) caused by the optical component. The resulting optical device becomes diffraction-limited (e.g., for the visible spectrum) with the metasurface.

Abstract: An optical imaging lens group includes, sequentially from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The first lens has positive refractive power, and both an object-side surface and an image-side surface thereof are convex; the second lens has refractive power, and an object-side surface thereof is convex; the third lens has refractive power, and an object-side surface thereof is concave; the fourth lens has refractive power; the fifth lens has refractive power; the sixth lens has refractive power, and an object-side surface thereof is convex; and the seventh lens has negative refractive power. An edge thickness ET6 of the sixth lens and a center thickness CT6 of the sixth lens along the optical axis satisfy 0.2<ET6/CT6<0.9.

Abstract: Discloses is a camera optical lens including nine lenses, and the nine lenses from an object side to an image side are: 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 positive refractive power, a fifth lens with a positive refractive power, a sixth lens with a positive refractive power, a seventh lens with a negative refractive power, an eighth lens with a positive refractive power and an ninth lens with a negative refractive power. The camera optical lens satisfies: ?1.80?f1/f??0.50; 3.00?d9/d10?15.00. The camera optical lens has good optical performance, and meets the design requirements of a large aperture, wide-angle and ultra-thin.

Abstract: An optical imaging system includes a first lens having a convex image-side surface, a second lens having a concave object-side surface, a third lens, a fourth lens, and a fifth lens disposed sequentially from an object side. The optical imaging system satisfies 4.8<f/IMG_HT<9.0, where f is a focal length of the optical imaging system, and IMG_HT is half a diagonal length of an imaging surface of an image sensor.

Abstract: A lens assembly for systems such as imaging devices. The lens assembly may include at least five lens elements, where one or more of the lens elements includes positive optical power and one or more of the lenses includes negative optical power. The lens assembly may further include an aperture stop located between the lens elements. In some instances, the lens assembly provides a horizontal field of view that is at least 80 degrees while still including a total track length that is less than or equal to 50 millimeters and a diameter that is less than or equal to 13 millimeters. Additionally, in some instances, the lens assembly may cause all rays which impinge the sensor to be less than or equal to approximately 10 degrees.

Abstract: A stack of eye shields includes a plurality of eye shields each having a frame with receivers located along the frame and latches located to engage the receivers, and spaced apart elevated support surfaces along and rising above an upper portion of the frame; and a lens installed on the frame and having lens apertures extending through the lens and aligned with the receivers of the frame, with the latches engaged with the receivers securing the lens to the frame. The eye shields are stacked one on top of another with each of the eye shields oriented substantially parallel to one another with each of the elevated surfaces of an overlying one of the frames of the stack being slightly forward of a corresponding one of the elevated surfaces of the underlying frame of the stack, with each frame of each eye shield of the stack having a gap therebetween except at contact surfaces where the elevated support surfaces contact an adjacent lower surface of an overlying eye shield.

Abstract: An eye shield includes a frame having a plurality of receivers located along the frame and a plurality of latches located to cooperate with the receivers, and a lens having a plurality of spaced apart lens apertures extending through the lens and located so as to align with the receivers of the frame when the lens is positioned for installation onto the frame. The latches are engageable with the receivers by rotating the latches to pass an elongate catch of the latch into the receiver through the aligned lens aperture and an open front of the receiver to latchingly engage a tooth of the latch with a catch surface of the receiver in a snap-fit frictional relationship. The latches are also selectively disengageable from the receivers by applying force to a lower edge of the latch and flexing the lower edge of the latch rearward slightly to disengage the tooth from the catch surface.

Abstract: A zoom lens system includes: a first lens group having positive power; a second lens group having negative power; a third lens group having positive power; a fourth lens group having negative power; and a fifth lens group having positive power. The first lens group is made up of a single lens. The second lens group is made up of four lenses. The zoom lens system is configured to zoom from a wide-angle end toward a telephoto end such that the fifth lens group does not move but the first to fourth lens groups move to change intervals between the lens groups.

Abstract: An imaging lens system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens disposed in order from an object side. In the imaging lens system, the first lens has positive refractive power and an object-side surface of the first lens is concave. A field of view of the imaging lens system is 100 degrees or more. In the imaging lens system, a distance TTL from the object-side surface of the first lens to an imaging plane and a height ImgH of the imaging plane satisfy TTL/ImgH<1.5.

Abstract: A camera optical lens is provided, including from an object side to an image side: a first lens having positive refractive power; a second lens having negative refractive power; a third lens having negative refractive power; a fourth lens having positive refractive power; and a fifth lens having negative refractive power. The camera optical lens satisfies following conditions: ?5.00?f2/f??2.50; 2.00?d5/d6?4.00; ?4.00?R7/R8??1.30; and ?2.00?(R1+R2)/(R1?R2)??1.00. The above camera optical lens may meet design requirements for large aperture, wide angle and ultra-thinness, while maintaining a high imaging quality.

Abstract: A camera optical lens is provided. The camera optical lens includes, from an object side to an image side, a first lens, a second lens having a positive refractive power, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens. The camera optical lens satisfies following conditions: 3.50?f1/f?6.00, and 1.50?d15/d16?9.00, where f denotes a focal length of the camera optical lens, f1 denotes a focal length of the first lens is defined as f1, d15 denotes an on-axis thickness of the eighth lens, and d16 denotes an on-axis distance from an image side surface of the eighth lens to an object side surface of the ninth lens. The camera optical lens has a good optical performance, and meets design requirements of a large aperture, wide-angle and ultra-thinness.

Abstract: An imaging optical lens assembly includes five lens elements. The five lens elements in order from an object side to an image side along an optical path are a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. Each of the five lens elements has an object-side surface facing the object side and an image-side surface facing the image side. The first lens element has positive refractive power, the second lens element has negative refractive power and the third lens element has negative refractive power. With specific conditions being satisfied, the imaging optical lens assembly can be miniaturized while providing good image quality.

Abstract: The present disclosure provides a wide-angle lens, including a first lens group having a negative focal power, a second lens group having a positive focal power, and an aperture stop disposed between the first lens group and the second lens group. The first lens group, from the object side to the imaging surface, sequentially includes a meniscus-shaped first lens having a negative focal power, a second lens having a negative focal power, and a third lens having a positive focal power. A concave surface of the first lens faces the imaging surface, and a concave surface of the second lens faces the imaging surface.

Abstract: The present invention relates to the field of optical lenses, and provides a camera optical lens, including, from an object side to an image side, a first lens having a positive refractive power, a second lens a negative refractive power, a third lens having a positive refractive power, a fourth lens having a negative refractive power, and a fifth lens. At least one of the first lens to the fifth lens has a free-form surface, and the camera optical lens satisfies: 0?R7; and R10?0, where R7 denotes a central curvature radius of an object side surface of the fourth lens, and R10 denotes a central curvature radius of an image side surface of the fifth lens. The camera optical lens provided by the present invention satisfies design requirements of a long focal length and ultra-thinness while having excellent optical performance.