A lens module capable of reducing flare includes a lens cone, a lens group, and a light-shielding sheet group. The lens group comprises a plurality of lenses formed from an object side of the lens module to an image side of the lens module. The light-shielding sheet group comprises a plurality of light-shielding sheets. The plurality of light-shielding sheets is embedded between each adjacent two lenses of the plurality of lenses. A difference value between an inner diameter of the lens cone corresponding to a first light shielding sheets arranged from the image side to the object side and an outer diameter of the first light shielding sheets arranged from the image side to the object side is greater than 0.01 mm and less than 0.02 mm. The disclosure also relates to an electronic device.

An image-capturing device includes: a plurality of micro-lenses disposed in a two-dimensional pattern near a focal plane of an image forming optical system; an image sensor that includes a two-dimensional array of element groups each corresponding to one of the micro-lenses and made up with a plurality of photoelectric conversion elements which receive, via the micro-lenses light fluxes from a subject having passed through the photographic optical system and output image signals; and a synthesizing unit that combines the image signals output from the plurality of photoelectric conversion elements based upon information so as to generate synthetic image data in correspondence to a plurality of image forming areas present on a given image forming plane of the image forming optical system, the information specifying positions of the photoelectric conversion elements output image signals that are to be used for generating synthetic image data for each image forming area.

An image-capturing device includes: a plurality of micro-lenses disposed in a two-dimensional pattern near a focal plane of an image forming optical system; an image sensor that includes a two-dimensional array of element groups each corresponding to one of the micro-lenses and made up with a plurality of photoelectric conversion elements which receive, via the micro-lenses light fluxes from a subject having passed through the photographic optical system and output image signals; and a synthesizing unit that combines the image signals output from the plurality of photoelectric conversion elements based upon information so as to generate synthetic image data in correspondence to a plurality of image forming areas present on a given image forming plane of the image forming optical system, the information specifying positions of the photoelectric conversion elements output image signals that are to be used for generating synthetic image data for each image forming area.

An objective lens for forming an image of an object. The objective lens includes, sequentially from an image side to an object side, a first lens group having negative refractive power, and a second lens group having positive refractive power.

An objective lens for forming an image of an object. The objective lens includes, sequentially from an image side to an object side, a first lens group having negative refractive power, and a second lens group having positive refractive power.

A lens assembly including 4˜7 lenses with a refractive power is provided. D1 is the diameter of a lens surface farthest away from the image plane of the lens assembly. DL is the diameter of a lens surface closest to the image plane of the lens assembly. LT is the length on an optical axis of the lens from the lens surface farthest away from the image plane of the lens assembly to the lens surface closest to the image plane of the lens assembly. The lens assembly satisfies the following conditions: (1) 6 mm<DL<20 mm, 1.5<LT/DL<2.4 and D1/DL>0.6 or (2) 6 mm<DL<20 mm, 1.25<LT/DL<1.7 and D1/DL>0.4.

A graded-index optical element may include a nanovoided material including a first surface and a second surface opposite the first surface. The nanovoided material may be transparent between the first surface and the second surface. Additionally, the nanovoided material may have a predefined change in effective refractive index in at least one axis due to a change in at least one of nanovoid size or nanovoid distribution along the at least one axis. Various other elements, devices, systems, materials, and methods are also disclosed.

A dual-aperture zoom camera comprising a Wide camera with a respective Wide lens and a Tele camera with a respective Tele lens, the Wide and Tele cameras mounted directly on a single printed circuit board, wherein the Wide and Tele lenses have respective effective focal lengths EFL.sub.W and EFL.sub.T and respective total track lengths TTL.sub.W and TTL.sub.T and wherein TTL.sub.W/EFL.sub.W>1.1 and TTL.sub.T/EFL.sub.T<1.0. Optionally, the dual-aperture zoom camera may further comprise an optical OIS controller configured to provide a compensation lens movement according to a user-defined zoom factor (ZF) and a camera tilt (CT) through LMV=CT*EFL.sub.ZF, where EFL.sub.ZF is a zoom-factor dependent effective focal length.

An optical lens assembly includes five lens elements and provides a TTL/EFL<1.0. In an embodiment, the focal length of the first lens element f1<TTL/2, an air gap between first and second lens elements is smaller than half the second lens element thickness, an air gap between the third and fourth lens elements is greater than TTL/5 and an air gap between the fourth and fifth lens elements is smaller than about 1.5 times the fifth lens element thickness. All lens elements may be aspheric.

An image-capturing device includes: a plurality of micro-lenses disposed in a two-dimensional pattern near a focal plane of an image forming optical system; an image sensor that includes a two-dimensional array of element groups each corresponding to one of the micro-lenses and made up with a plurality of photoelectric conversion elements which receive, via the micro-lenses light fluxes from a subject having passed through the photographic optical system and output image signals; and a synthesizing unit that combines the image signals output from the plurality of photoelectric conversion elements based upon information so as to generate synthetic image data in correspondence to a plurality of image forming areas present on a given image forming plane of the image forming optical system, the information specifying positions of the photoelectric conversion elements output image signals that are to be used for generating synthetic image data for each image forming area.