The disclosure provides a zoom lens assembly, which sequentially includes from an object side to an image side along an optical axis: a first lens group; a second lens group with a positive refractive power, spaced from the first lens group by a first air space and movable on the optical axis; a third lens group with a positive refractive power, spaced from the second lens group by a second air space and movable on the optical axis; and a fourth lens group, spaced from the third lens group by a third air space; wherein a Total Track Length (TTL) of the zoom lens assembly and a difference Δf between an effective focal length of the zoom lens assembly at a wide end and an effective focal length of the zoom lens assembly at a tele end satisfy 2.5<TTL/|Δf|<4.0.

The present embodiment relates to a lens driving device comprising: a housing; a bobbin disposed inside the housing; a coil disposed at the bobbin; a magnet disposed in the housing and facing the coil; an elastic member coupled to the housing and the bobbin; and a damper disposed at the elastic member, wherein the elastic member comprises an outer part coupled to the housing, an inner part coupled to the bobbin, and a connection part for connecting the outer part and the inner part; and the damper is disposed at the connection part.

Provided is a meta-lens including a first region including a plurality of first nanostructures that are two-dimensionally provided in a circumferential direction and a radial direction, wherein the plurality of first nanostructures are provided based on a first rule, and a plurality of second regions surrounding the first region, each of the plurality of second regions including a plurality of second nanostructures that are two-dimensionally provided in a circumferential direction and a radial direction, wherein the plurality of second nanostructures are provided in each of the plurality of second regions based on a plurality of second rules, respectively, that are different from the first rule.

A meta lens includes a first lens surface, and a second lens surface provided opposite to the first lens surface, wherein at least one of the first lens surface and the second lens surface is a metasurface including a plurality of nanostructures having a sub-wavelength dimension that is less than a central wavelength λ.sub.0 in an operation wavelength band of the meta lens, and wherein a deflection property of the first lens surface and a deflection property of the second lens surface based on positions of incident light are opposite to each other in at least some regions of each of the first lens surface and the second lens surface.

This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for lens design for full-duplex communication. In some aspects, a device may use a lens design that enables full-duplex operation through a lens by facilitating an avoidance or mitigation of self-interference during full-duplex operation. The lens may have a first, antenna-facing surface and a second, outward-facing surface and, to avoid or mitigate self-interference due to reflection off the lens, the first surface may have a first curvature associated with a relatively small radius. In such examples, the device may transmit wireless signaling from a transmitting element and a reflection off the lens may be dispersed or otherwise oriented away from a receiving element in accordance with a design of the first curvature. In some implementations, the lens may include an anti-reflective coating to further reduce reflection off the lens.

An imaging lens assembly, having an optical axis, includes an imaging lens set and a lens holding member. The lens holding member accommodates the imaging lens set for aligning the imaging lens set with the optical axis. The lens holding member includes a plurality of light-blocking structures, which are disposed on an object side of the imaging lens set and surround the optical axis for forming a light passing hole. Each of the light-blocking structures is a straight-line shape and has two end points and one central point, and the central point is closer to the optical axis than each of the two end points thereto. A maximum radius of the light passing hole is defined by a position near each of the two end points, and a minimum radius thereof is defined by a position near the central point.

An optical lens for being passed through by an image light includes a first lens, a second lens, and a first shading layer. The first lens has a first optical valid area and a first optical invalid area surrounding the first optical valid area. The second lens has a second optical valid area and a second optical invalid area. The second optical valid area faces the first optical valid area. The second optical invalid area surrounds the second optical valid area. The first shading layer is disposed on a side peripheral surface of the first optical invalid area and a side peripheral surface of the second optical invalid area, providing the function of blocking the non-imaging light, reducing the number of light-shielding parts, reducing the cost of parts, and shortening the assembling time.

A multi-element imaging lens can be formed from five plastic elements, and an optional null-power or relatively low power sixth plastic element. The lens can use selected plastic materials to reduce a thermal focal shift. In the lens, negative refractive power elements can be formed from plastic materials having a relatively large negative refractive index variation with temperature, abbreviated as dn/dT, while positive refractive power elements can be formed from plastic materials having a relatively small negative dn/dT. Reducing the thermal focal shift, as disclosed, can eliminate the need for an auto-focusing device, such as a voice coil. Reducing the thermal focal shift, as disclosed, can also eliminate the need to use one or more glass elements to further reduce thermal focal shift, which can reduce cost for the lens.

Manufacturing an imaging apparatus including, in an imaging lens optical system, a function to correct aberration is facilitated. A meta-lens and an imaging element constituting the imaging apparatus are formed by a semiconductor process. The meta-lens corrects aberration in the imaging lens optical system. The imaging element images incident light incident via the imaging lens optical system. The meta-lens may be formed inside the imaging element or on a surface of the imaging element or may be formed as a part of a wafer level chip size package.

Imaging systems and methods are provided for taking high-magnification photographs confined to a small physical volume. In some embodiments the system is composed of at least one lens, one or more partially reflective elements, and a sensor. The partial reflectors reflect a portion of the light back and forth between them to allow a long path length for a portion of the light from the lens to the sensor which enables a high magnification.