Abstract: The present invention provides an optical imaging lens. The optical imaging lens comprises nine lens elements positioned in an order from an object side to an image side. Through controlling the convex or concave shape of the surfaces of the lens elements, the optical imaging lens may be provided with reduced f number and increased image height, along with good imaging quality.

Abstract: 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.

Abstract: An eye-tracking system includes a substrate transparent to visible light and configured to be placed in a field of view of an eye of a user, a plurality of waveguides on the substrate, a light source optically coupled to the plurality of waveguides, and a plurality of polarization volume holograms (PVHs) in the field of view of the eye of the user. Each PVH of the plurality of PVHs is optically coupled to a respective waveguide of the plurality of waveguides and is configured to couple a respective light beam out of the respective waveguide towards the eye of the user.

Abstract: An optical imaging lens, in order from an object side to an image side along an optical axis, includes a first optical assembly, a second optical assembly, a third optical assembly, an aperture, a fourth optical assembly, and a fifth optical assembly, wherein two of the first optical assembly, the second optical assembly, the third optical assembly, the fourth optical assembly, and the fifth optical assembly are a compound lens formed by adhering at least two lenses, while the others are single lens, thereby achieving the effect of high image quality and low distortion.

Abstract: A photographing optical lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof. The second lens element has negative refractive power. The sixth lens element has at least one of an object-side surface and an image-side surface being aspheric, wherein at least one of the object-side surface and the image-side surface of the sixth lens element comprises at least one inflection point. The seventh lens element has an object-side surface and an image-side surface being both aspheric.

Abstract: An imaging optical lens assembly includes nine lens elements which are, in order from an object side to an image side along an optical path: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element, an eighth lens element and a ninth lens element. The first lens element has positive refractive power. The eighth lens element with positive refractive power has an image-side surface being convex in a paraxial region thereof. The ninth lens element has an image-side surface being concave in a paraxial region thereof, and the image-side surface of the ninth lens element has at least one convex critical point in an off-axis region thereof.

Abstract: An optical imaging lens includes a first lens element to a seventh lens element, and each lens element has an object-side surface and an image-side surface. The second lens element has negative refracting power, and a periphery region of the object-side surface of the second lens element is convex, a periphery region of the object-side surface of the third lens element is concave, the fourth lens element has negative refracting power, an optical axis region of the object-side surface of the fourth lens element is concave, an optical axis region of the image-side surface of the fifth lens element is concave, and an optical axis region of the image-side surface of the sixth lens element is convex. Lens elements included by the optical imaging lens are only the seven lens elements mentioned above, and the following relationships: V2+V3+V5?120.000 and (T1+L4IL7I)/(T2+G23+T3)?3.000 are satisfied.

Abstract: The present embodiment relates to a lens driving device comprising: a cover comprising an upper plate, a side plate and an inner yoke; a base; a holder; a coil; a magnet; and a lateral elastic member, wherein the holder comprises a groove formed in the upper surface of the holder, and at least a portion of the inner yoke of the cover is inserted in the groove of the holder so that the holder engages with the inner yoke when the holder rotates.

Abstract: Methods and systems are provided for an adaptive illumination system. In one example, an adaptive illumination system comprises an adaptive illuminator comprising at least three optical elements including a first optical element, a second optical element, and a third optical element, wherein a distance between the first optical element and the second optical element is adjustable.

Abstract: A lens curvature variation apparatus according to an embodiment includes: a liquid lens including a common electrode and a plurality of individual electrodes; a lens driver configured to apply a voltage to the common electrode and the plurality of individual electrodes; a sensor unit configured to sense an interface of the liquid lens; an AD converter configured to convert an analog signal corresponding to the interface output from the sensor unit into a digital signal; and a controller configured to control the lens driver based on a signal output from the AD converter, wherein the plurality of individual electrodes includes a first group and a second group each including two or more individual electrodes, wherein the sensor unit includes a first sensor unit connected to a first individual electrode among individual electrodes of the first group; and a second sensor unit connected to a second individual electrode among individual electrodes of the second group; and wherein the controller includes a controlle

Abstract: A camera module according to an embodiment may include a base including a first side wall and a second side wall corresponding to the first side wall, a first guide part disposed adjacent to the first side wall of the base, a second guide part disposed adjacent to the second side wall of the base, a first lens assembly that moves along the first guide part, a second lens assembly that moves along the second guide part, a first ball disposed between the first guide part and the first lens assembly, and a second ball disposed between the second guide part and the second lens assembly.

Abstract: A display device includes a projection lens that transmits an image light, a prism mirror that receives the image light emitted from the projection lens through a light incident surface, reflects the image light with an inner reflection surface, and emits the image light from a light emission surface, and a see-through mirror that reflects a part of the image light emitted from the prism mirror toward a pupil position, wherein an intermediate image is formed between the inner reflection surface and the see-through mirror, and the light emission surface has a first region and a second region that is higher a refractive power than the first region.

Abstract: An optical imaging lens assembly including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens sequentially from an object side to an image side along an optical axis is provided. The first lens has a negative refractive power, an object-side surface thereof is a concave surface, and an image-side surface thereof is a convex surface; and the third lens has a negative refractive power. The distance TTL from the object-side surface of the first lens to the imaging surface of the optical imaging lens assembly on the optical axis and a half ImgH of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens assembly satisfy: TTL/ImgH?1.4.

Abstract: A lens drive device is provided with a first fixed part, a first movable part, a first supporting part, and a Z-direction drive unit which moves the first movable section in an optical axis direction (the Z-direction) relative to the first fixed part and is constituted by an ultrasonic motor that converts vibration motion into rotational motion. The lens drive device further has a rotating body which rotates around the optical axis in response to rotational motion of the Z-direction drive unit, and a mechanical element which converts the rotational motion of the rotating body into linear motion in the optical axis direction, the first movable part being moved in the optical axis direction by rotation of the rotating body.

Abstract: 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. 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.

Abstract: A refraction measuring apparatus measures refractive properties of an eye by two light bundles respectively passing through two apertures, the apparatus including: a first rotational member, rotatably supported about a first rotational center, provided with the two apertures on either side of the first rotational center; a second rotational member, rotatably supported about a second rotational center, provided with a light-transmission portion(s) and a light-shielding portion at different rotational-direction positions.

Abstract: An optical photographing lens assembly includes nine lens elements which are, in order from an object side to an image side: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element, an eighth lens element and a ninth lens element. Each of the nine lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. At least one lens element of the optical photographing lens assembly has at least one aspheric lens surface having at least one inflection point.

Abstract: The disclosure provides an optical imaging lens group, which sequentially includes 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 refractive power; a third lens with a refractive power, an image-side surface thereof is a concave surface; a fourth lens with a negative refractive power; a fifth lens with a refractive power; and a sixth lens with a refractive power. Semi-FOV is a half of a maximum field of view of the optical imaging lens group, and Semi-FOV satisfies 45°<Semi-FOV<55°. A curvature radius R1 of an object-side surface of the first lens, a curvature radius R2 of an image-side surface of the first lens, a curvature radius R3 of an object-side surface of the second lens and a curvature radius R4 of an image-side surface of the second lens satisfy 0.5<(R1+R2)/(R3?R4)<1.5.

Abstract: The disclosure provides an optical imaging lens group. The optical imaging lens group sequentially includes from an object side to an image side along an optical axis of the optical imaging lens group: a first lens with a positive refractive power; a second lens with a refractive power, an image-side surface of the second lens is a concave surface; a third lens with a refractive power; a fourth lens with a refractive power, an image-side surface of the fourth lens is a concave surface; a fifth lens with a refractive power; a sixth lens with a refractive power, an image-side surface of the sixth lens is a concave surface; and a seventh lens with a negative refractive power. A maximum field of view FOV of the optical imaging lens group and an effective focal length f of the optical imaging lens group satisfy tan(FOV/2)*f>5 mm.

Abstract: Lens assemblies comprising from an object side to an image side, seven lens elements numbered L1-L7; an optical window; and an image sensor having a sensor diagonal length (SDL), wherein an exemplary lens assembly has a total track length TTL that includes the optical window an effective focal length EFL and a field of view (FOV), wherein TTL/EFL<1.100, wherein TTL/SDL<0.64, wherein FOV<90 degrees, wherein a normalized thickness standard deviation constant T_STD of at least four of the seven lens elements complies with T_STD<0.035, and wherein a focal length f1 of lens element L1 fulfills f1/EFL<0.95.