Abstract: A lens apparatus includes an operation member that is rotatable by a user operation, a zoom lens configured to perform zooming in accordance with a rotation of the operating member, and a detector configured to divide an entire zoom range from a wide-angle end to a telephoto end, and detect a zoom position of the zoom lens. A predetermined condition is satisfied.
Abstract: An imaging optical lens assembly includes four 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 and a fourth lens element. Each of the four 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 of all lens surfaces of the four lens elements is aspheric and has at least one inflection point.
November 24, 2020
Date of Patent:
January 17, 2023
LARGAN PRECISION CO., LTD.
Yu-Tai Tseng, Yu-Chun Ke, Kuo-Jui Wang, Tzu-Chieh Kuo
Abstract: The present disclosure discloses an imaging apparatus and an electronic device. The imaging apparatus includes a macro lens group, a wide-angle lens group, and a telephoto lens group. An effective focal length fA of the macro lens group, an effective focal length fB of the wide-angle lens group and an effective focal length fC of the telephoto lens group satisfy: fA<fB<fC, 0.20<fA/fB<0.80 and 0.10<fA/fC<0.50.
Abstract: The present disclosure provides a metalens array and a spatial positioning method based on the metalens array. The metalens array includes at least two metalenses, each of the metalenses comprises a plurality of prism cells, each of the prism cells comprises a silicon dioxide substrate and a titanium oxide prism placed on the silicon dioxide substrate, and the plurality of prism cells are arranged periodically.
Abstract: The zoom lens includes, as lens groups, in order from the object side, only a first lens group having a positive power, a second lens group having a negative power, a third lens group having a positive power, a fourth lens group having a negative power, and a fifth lens group having a positive power. An aperture stop is disposed between a lens surface closest to the image side in the second lens group and a lens surface closest to the object side in the fourth lens group. During zooming, at least the first lens group, the second lens group, the third lens group, and the fourth lens group move. The first lens group consists of a negative lens, a positive lens, and a positive lens in order from the object side. The zoom lens satisfies predetermined conditional expressions.
Abstract: A curved lens and a display device are provided. The curved lens includes a plurality of sub lenses around an optical center of the curved lens and connected; each of the plurality of sub lenses includes a first and second curved surface opposite to each other; a plurality of first curved surfaces are connected to form a light exit surface of the curved lens, and a plurality of the second curved surfaces are connected to form a light incident surface of the curved lens, and the light exit surface is closer to the optical center of the curved lens compared with the light incident surface; the light incident surface as a whole is a convex surface, and the light exit surface as a whole is a concave surface; the plurality of the first curved surfaces and the plurality of the second curved surfaces are free-form curved surfaces.
Abstract: An interchangeable lens is removably attached to a camera body including a body-side mount, an image sensor, body-side terminals and a first to fourth body-side claws. The interchangeable lens includes the lens-side mount, lens-side terminals which are in contact with body-side terminals, a first to fourth lens-side claws engaged with the first to fourth body-side claws once the interchangeable lens is attached to the camera body. The first and third lens-side claws are disposed on a third lens-side line intersecting with the first lens-side line at an optical axis with approximately 45 degrees. The first lens-side line passes through a center between opposite ends of the first lens-side claw to the optical axis. The second and fourth lens-side claws are disposed on a fourth lens-side line orthogonal to the third lens-side line at the optical axis.
Abstract: A lens drive device, including a lens support, a coil winded at a periphery of the lens support; a screening can is covered outside the lens support; a driving magnets is respectively provided on opposite two inner sidewalls of the screening can; a Printed Circuit Board board (PCB board) is provided on a sidewall at another side of the screening can; a Hall chip is provided on the PCB board; a Hall magnet back gasket and a Hall magnet are provided at corresponding positions of the lens support; and the PCB board and the Hall chip thereon and the Hall magnet form a lens position detection unit. Since the driving magnets and the Hall magnet are not hindered to each other in a configuration structure, no obstacle is produced to assembly work, and the further miniaturization and thinning of the lens drive device also become possible.
Abstract: A photographing lens assembly includes seven 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 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 with negative refractive power has an image-side surface being concave in a paraxial region thereof. The seventh lens element has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The image-side surface of the seventh lens element includes at least one convex shape in an off-axis region thereof. The object-side surface and the image-side surface of the seventh lens element are aspheric.
Abstract: An optical imaging 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 to an imaging plane. One or any combination of the first lens to the seventh lens are formed of glass. One or both surfaces of one or more of the first lens to the seventh lens are aspherical. A pair of lenses, among the first lens to the seventh lens, allows paraxial areas opposing each other to be bonded to each other.
Abstract: A lens module includes a first lens, a second lens, and a third lens comprising a convex object-side surface and a convex image-side surface. The lens module also includes a fourth lens including a concave object-side surface and a concave image-side surface, a fifth lens including a concave object-side surface, and a sixth lens including an inflection point formed on an image-side surface thereof. The first to sixth lenses are sequentially disposed from an object side to an image side.
Abstract: An immersion microscope objective includes a first lens group that consists of a first cemented lens consisting of a planoconvex lens and a first meniscus lens, the first meniscus lens having a thickness that is greater than a radius of curvature of a lens surface on an image side of the first meniscus lens, a second lens group that includes a plurality of second cemented lenses, a third lens group that consists of a third cemented lens, and a fourth lens group that includes a fourth cemented lens consisting of a plurality of meniscus lenses. The objective satisfies the relationship 2?h1/h2?4, where h1 indicates an axial marginal ray height at a lens surface of the third cemented lens that is closest to an object, and h2 indicates an axial marginal ray height at a lens surface of the third cemented lens that is closest to an image.
Abstract: A near eye display system can include a first triplet lens arranged in a tile fashion and configured to be associated with a left eye. The near eye display system also can include a second triplet lens arranged in the tile fashion and configured to be associated with a right eye. A multiple display system can be paired with the first triplet lens and the second triplet lens.
Abstract: The present invention relates to a multichannel imaging device and more specifically to a multichannel device wherein each optical channel has at least an optical low-pass angular filter configured to block any light propagating through the optical channel along a direction of propagation having an angle which is greater than a predefined angle ?L relative to the optical axis, the low-pass angular filter comprising at least one planar interface, separating a first material having a first refractive index n1 and a second material having a second refractive index n2, the ratio of the second refractive index over the first refractive index being lower than 1, preferably lower than 0.66.
Abstract: A zoom optical system (ZL) includes: a first lens group (G1) having negative refractive power; a second lens group (G2) having positive refractive power, the second lens group (G2) being disposed further toward an image than the first lens group (G1); and a succeeding lens group (GL) having a vibration-isolating group (GVRb) that moves so as to have a displacement component in a direction orthogonal to an optical axis, the succeeding lens group (GL) being disposed further toward the image than the second lens group (G2), a distance between the first lens group (G1) and the second lens group (G2) changing and a distance between the second lens group (G2) and the succeeding lens group (GL) changing upon zooming, and the following conditional expression being satisfied: 4.899?|f1VRaw/fw|<1000.
Abstract: A driving apparatus performs driving of an object. The apparatus includes a driving device for the driving; a position detector, and a controller. The position detector is configured to detect the position of the object. The controller is configured to generate a first signal for open-loop control of the driving device based on a target velocity of the object, generate a second signal for closed-loop control of the driving device based on the detected position and a target position of the object, and generate a driving signal for the driving device based on at least one of the first signal and the second signal. The controller is further configured to perform weighted summing of the first signal and the second signal to generate the driving signal based on inversion between positive and negative of load for the driving device.
Abstract: The present invention provides a lens substrate stacking position calculating apparatus capable of calculating a stacking position at which the number of lens sets whose optical axis deviation falls within an allowable range is maximized, when a plurality of wafer lens arrays are bonded together even if the position of each lens formed on a wafer substrate is deviated between wafer lens arrays to be stacked. The lens substrate stacking position calculating apparatus calculates the positional relationship of two or more transparent substrates to be stacked when the two or more transparent substrates on which a plurality of lenses are two-dimensionally arranged are stacked to form a plurality of lens sets each including two or more lenses. A position of each lens is specified in advance in a common coordinate system.
Abstract: Provided is a camera lens of a catadioptric optical system consisting of two lens assemblies and one lens and having a small height, a narrow angle, and good optical properties. The camera lens includes: a first lens assembly including an object side surface having a first refractive surface and a second reflective surface in a peripheral region and a central region thereof, and an image side surface having a second refractive surface, a fifth refractive surface and a sixth refractive surface that are sequentially arranged from a peripheral region to a central region thereof; a second lens assembly including an object side surface having a third refractive surface and a fourth refractive surface that are sequentially arranged from a peripheral region to a central region, and an image side surface having a first reflective surface; and a third lens having a refractive power.
Abstract: The present invention is intended to provide an adaptive optics system and an optical device that allow correction of wavefront phase aberration with higher accuracy than before and have a wider correction range than the conventional ones, regardless of the distance between the observation target and the fluctuation layer, and the size of the observation target. An adaptive optics system includes: a wavefront phase modulator that makes aberration correction to incident light and emits the corrected light; and an imaging-conjugated position adjustment mechanism that adjusts freely within a specimen the position of a surface imaging-conjugated with a fluctuation correction surface formed by the wavefront phase modulator. The imaging-conjugated position adjustment mechanism adjusts the fluctuation correction surface to be imaging-conjugated with a fluctuation layer existing in the specimen.
February 22, 2019
Date of Patent:
August 23, 2022
INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL INSTITUTES OF NATURAL SCIENCES
Abstract: An optical system LO includes in this order from an object side to an image side, a first lens unit FL, an aperture stop SP, and a second lens unit RL having a positive refractive power. The first lens unit FL includes at least three negative lenses including in order from the object side to the image side, negative lenses (G1N), (G2N), and (G3N). At least one lens surface of the negative lenses (G1N), (G2N), and (G3N) is an aspherical surface that satisfies a predetermined conditional inequality.