Abstract: Disclosed is a camera optical lens including six lenses from an object side to an image side being: a first lens with a positive refractive power, a second lens with a negative refractive power, a third lens with a negative refractive power, a fourth lens with a positive refractive power, a fifth lens with a negative refractive power, and a sixth lens with a negative refractive power. The camera optical lens satisfies: 65.00?v1?90.00; 2.00?d8/d9?8.00; wherein, v1 denotes an abbe number of the first lens, d8 denotes an on-axis distance from an image-side surface of the fourth lens to an object-side surface of the fifth lens, and d9 denotes an on-axis thickness of the fifth lens.

Abstract: The present disclosure discloses an optical imaging lens assembly. The optical imaging lens assembly 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 a positive refractive power, and an object-side surface thereof is a convex surface; the second lens has a negative refractive power, and an image-side surface thereof is a concave surface; each of the third lens, the fourth lens, the fifth lens and the sixth lens have a positive refractive power or a negative refractive power; the seventh lens has a negative refractive power, and an object-side surface thereof is a concave surface. A total effective focal length f of the optical imaging lens assembly and an effective focal length f1 of the first lens satisfy f/f1?2.0.

Abstract: The present disclosure discloses an optical imaging lens assembly including, sequentially from an object side to an image side along an optical axis, a first lens having positive refractive power with a convex object-side surface; a second lens having refractive power; a third lens having refractive power; a fourth lens having refractive power with a convex object-side surface and a concave image-side surface; a fifth lens having positive refractive power; and a sixth lens having negative refractive power with a convex object-side surface, wherein a distance TTL along the optical axis from the object-side surface of the first lens to an imaging plane of the optical imaging lens assembly, half of a diagonal length ImgH of an effective pixel area on the imaging plane, and half of a maximal field-of-view Semi-FOV of the optical imaging lens assembly satisfy TTL/ImgH<1.6, and 4.5 mm<f*tan(Semi-FOV)<7 mm.

Abstract: An optical system includes a first lens including a negative refractive power and a convex object-side surface, a second lens, and a third lens including a negative refractive power and a convex object-side surface. The optical system also includes a fourth lens, a fifth lens including a negative refractive power, and a sixth lens including a negative refractive power and comprising an inflection point on an image-side surface thereof. The first to sixth lenses are sequentially disposed from an object toward an imaging plane.

Abstract: The present disclosure discloses an optical imaging lens assembly including, sequentially from an object side to an image side along an optical axis, a first lens having refractive power; a second lens having refractive power with a convex object-side surface and a concave image-side surface; a third lens having refractive power; a fourth lens having negative refractive power; a fifth lens having negative refractive power with a concave object-side surface and a convex image-side surface; and a sixth lens having refractive power with a concave object-side surface and a convex image-side surface. A distance TTL along the optical axis from an object-side surface of the first lens to an imaging plane of the optical imaging lens assembly and a total effective focal length f of the optical imaging lens assembly satisfy: TTL/f<1.

Abstract: A six-piece optical image capturing system is disclosed. In order from an object side to an image side, the optical lenses along the optical axis include a first lens with refractive power; a second lens with refractive power; a third lens with refractive power; a fourth lens with refractive power; a fifth lens with refractive power, and a sixth lens with negative refractive power. At least one lens among the first lens to the fifth lens has positive refractive power. The image-side surface and object-side surface of the sixth lens are aspheric, and at least one of the image-side surface and the object-side surface of the sixth lens has an inflection point. The optical lens of the optical image capturing system can increase aperture value and improve the imagining quality for use in compact cameras.

Abstract: The present disclosure discloses an optical imaging system including, sequentially from an object side to an image side along an optical axis, a first lens having a negative refractive power, and an image-side surface thereof being concave; a second lens having a refractive power; a third lens having a positive refractive power, and an object-side surface thereof being convex and an image-side surface thereof being convex; a fourth lens having a negative refractive power; a fifth lens having a refractive power, and an image-side surface thereof being convex; and a sixth lens having a refractive power, wherein half of a maximum field-of-view Semi-FOV of the optical imaging system satisfies Semi-FOV>60°; and a maximum effective radius DT12 of the image-side surface of the first lens and a maximum effective radius DT62 of an image-side surface of the sixth lens satisfy 0.5<DT12/DT62<1.

Abstract: The present disclosure discloses an optical imaging lens assembly including, 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, and a sixth lens. The first lens has a positive refractive power; the second lens has a negative refractive power; the third lens has a negative refractive power; the fourth lens has a refractive power, and an image-side surface thereof is a convex surface; the fifth lens has a negative refractive power, and an object-side surface thereof is a concave surface; and the sixth lens has a refractive power, and an object-side surface thereof is a concave surface. Here, an effective focal length f3 of the third lens and an effective focal length f of the optical imaging lens assembly satisfy ?3<f3/f<?1.5.

Abstract: The present disclosure discloses an optical imaging lens assembly which includes, sequentially from an object side to an image side along an optical axis, a first lens having a refractive power with a concave image-side surface; a second lens having a refractive power; a third lens having a positive refractive power; a fourth lens having a refractive power; a fifth lens having a positive refractive power with a convex image-side surface; and a sixth lens having a positive refractive power with a convex object-side surface and a concave image-side surface, wherein half of a maximum field-of-view angle HFOV of the optical imaging lens assembly satisfies: HFOV>55°, and a distance TTL from an object-side surface of the first lens to an imaging plane along the optical axis and half of a diagonal length ImgH of an effective pixel area on the imaging plane satisfy: 1.2<TTL/ImgH<2.3.

Abstract: An image capturing lens assembly includes six 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 and a sixth lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof. The fourth lens element with positive refractive power has an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The sixth lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof. At least one of an object-side surface and an image-side surface of at least one lens element has at least one inflection in an off-axis region thereof.

Abstract: A near-eye light field display device includes a plurality of sub-aperture light field emitting modules and a bi-telecentric lens group. The plurality of sub-aperture light field emitting modules are adapted to generate a plurality of sub-aperture light fields. The bi-telecentric lens group is disposed on one side of the plurality of sub-aperture light field emitting modules, wherein the plurality of sub-aperture light fields pass through the bi-telecentric lens group and are converted into an exit light field by the bi-telecentric lens group, and the exit light field is incident on a receiver.

Abstract: The present disclosure discloses an imaging lens assembly. Sequentially from an object side to an image side along an optical axis, the imaging lens assembly includes a first lens having a positive refractive power; a second lens having a negative refractive power, and both an object-side surface and an image-side surface thereof being concave surfaces; a third lens having a positive refractive power, and an image-side surface thereof being a convex surface; a fourth lens having a negative refractive power, and an object-side surface thereof being a concave surface; a fifth lens having a refractive power; and a sixth lens having a refractive power. A total effective focal length f of the imaging lens assembly and half of a diagonal length ImgH of an effective pixel area on an imaging plane of the imaging lens assembly satisfy 2.0?f/ImgH?3.0.

Abstract: A contact lens having a cap, core, and base forming three layers to allow for the contact lens to be thick enough to accommodate a payload, while ensuring sufficient oxygenation of the wearer's eye. The cap and base are each a thin layer of gas-permeable material, each shaped to form an air gap between them and the core. The two air gaps are connected by air passages that traverse the core. Oxygen from an outside environment passes through the gas-permeable cap to reach the outer air gap, through the air passages to the inner air gap, and through the gas-permeable base to reach the cornea of the wearer's eye. The cap may be annular in form, having a center hole such that the cap does not extend over the central zone of the core, reducing a thickness of the contact lens.

Abstract: An imaging lenses and an imaging device are provided, the imaging lenses includes a first imaging lens, a second imaging lens and a third imaging lens which are arranged at intervals in sequence, wherein the first imaging lens, the second imaging lens and the third imaging lens satisfy 1.0<Fno1<Fno2<Fno3<3.0; 5.0 mm>F1>F2>F3>1.0 mm; P1<P2<P3; wherein Fno1 is an aperture number of the first imaging lens, Fno2 is an aperture number of the second imaging lens, Fno2 is an aperture number of the third imaging lens, F1 is an effective focal length of the first imaging lens, F2 is an effective focal length of the second imaging lens, F3 is an effective focal length of the third imaging lens. The disclosure solves the problem in the related art that a resolution of light of 3D structure the imaging device is low in a distant scene.

Abstract: A camera module is attached to an inside of a windshield of a vehicle to capture an image of an outside view. The camera module includes an imager, a lens set equipped with a first lens and a second lens, a lens barrel in which the lens set is disposed, and a main spacer fit in the lens barrel. The lens barrel retains the first lens using an axial force oriented along an optical axis of the lens set. The main spacer is disposed between the first and second lenses and transmits the axial force from one of the first and second lenses to the other. This structure enables the camera module to be reduced in size without sacrificing the optical performance thereof.

Abstract: A method and system are proposed for imaging the retinal structure of an eye. A light source is provided and a repetitive pattern is projected on the retina by said hght source having illuminated and non-illuminated portions with a spatial frequency larger than 0.5 mm-1. For the illuminated and non-illuminated portions a fluorescence level is measured; and a fluorescence level is derived as a corrected value for illuminated and non-illuminated areas.

Abstract: A photographing optical lens assembly includes six 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 and a sixth lens element. Each of the six lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The first lens element has positive refractive power. The second lens element has negative refractive power. The third lens element has negative refractive power. The fourth lens element has negative refractive power. The fifth lens element has positive refractive power. The sixth lens element has negative refractive power. An axial distance between the fourth lens element and the fifth lens element is larger than an axial distance between the fifth lens element and the sixth lens element.

Abstract: The present disclosure discloses an optical imaging system which includes, sequentially from an object side to an image side along an optical axis, a first lens having positive refractive power; a second lens having negative refractive power; a third lens having refractive power with an object-side surface being concave and an image-side surface being convex; a fourth lens having refractive power; a fifth lens having positive refractive power with an object-side surface being convex; a sixth lens having negative refractive power with an object-side surface being concave and an image-side surface being concave. An effective focal length f of the optical imaging system and half of a maximum field-of-view angle Semi-FOV of the optical imaging system may satisfy f*tan(Semi-FOV)>4.4 mm.

Abstract: A multi-view diagnostic system includes an OCT engine and a plurality of optical elements defining a plurality of beam paths between the OCT engine and an ophthalmic target, with each beam path corresponding to a different viewing angle of the ophthalmic target. The system also includes a scanner to direct OCT imaging beams generated by the OCT engine toward the ophthalmic target along each respective beam path. Instructions stored in memory are executable by a processor to determine a characteristic of the ophthalmic target based on OCT light reflected by the ophthalmic target along each respective beam path and detected by the OCT engine.

Abstract: A method for producing a freeform Fresnel surface having a number of Fresnel facets with a respective Fresnel segment surface and a trailing edge includes the production of the freeform Fresnel surface via machining processing of a starting body based on the construction data for the freeform Fresnel surface. With the aid of the circular cylinder casing surfaces and/or cone casing surfaces, the projection of the edges of the Fresnel facets on the x-y-plane represent circular paths for the creation of the construction data.