Abstract: A zoom lens includes: a first lens group having positive refractive power; a second lens group having negative refractive power; a third lens group having positive refractive power; a fourth lens group having positive refractive power; a fifth lens group having negative refractive power; and a sixth lens group having positive refractive power. The first to sixth lens groups are arranged in order from an object side. A total length of the zoom lens varies when a lens position state varies from a wide end state to a telephoto end state. A focusing operation is performed through allowing the fifth lens group to travel along an optical axis in accordance with variation in a subject distance from infinite to a closer distance.

Abstract: The present invention provides a camera device and an optical imaging lens thereof. The optical imaging lens comprises six 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 view angle of the optical imaging lens is efficiently increased to shows better optical characteristics.

Abstract: An optical photographing 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 and a fourth lens element. The first lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof. The second lens element with positive refractive power has an image-side surface being convex in a paraxial region thereof. The third lens element with positive refractive power has an image-side surface being convex in a paraxial region thereof, wherein both of an object-side surface and the image-side surface of the third lens element are aspheric. The fourth lens element has negative refractive power, wherein both of an object-side surface and an image-side surface of the fourth lens element are aspheric. The optical photographing lens assembly has a total of four non-cemented lens elements with refractive power.

Abstract: A zoom lens including, in order from an object side: a positive first lens unit; a negative second lens unit; and a positive third lens unit, in which: an interval between the first and second lens units is increased, and an interval between the second and third lens units is decreased during zooming from a wide angle end to a telephoto end; the second lens unit is an image stabilizing lens unit which moves with a component of motion in a direction perpendicular to an optical axis whereby an imaging position is moved in the direction of motion perpendicular to the optical axis; and a focal length of an entire system at the wide angle end, a focal length of the first lens unit, and a movement amount of the first lens unit during zooming from the wide angle end to the telephoto end are each set appropriately.

Abstract: A zoom lens includes a first lens group having positive refracting power, a second lens group having negative refracting power, a third lens group having positive refracting power, a fourth lens group having negative refracting power and a fifth lens group having negative refracting power in order from an object side, in which the lens groups move in magnification change from a wide angle end to a telephoto end such that a gap between the first lens group and the second lens group increases and a gap between the second lens group and the third lens group decreases, a negative lens group disposed closer to an image focusing side than a diaphragm among all lens groups is set as a focusing lens group, and the focusing lens group moves toward the image focusing side at focusing from infinity to a close object, the zoom lens satisfies a conditional expression.

Abstract: A zoom lens system comprising a plurality of lens units each being composed of at least one lens element, and comprising, in order from an object side to an image side, a first lens unit having positive optical power, a second lens unit having negative optical power, a third lens unit having positive optical power, a fourth lens unit having positive optical power, and a fifth lens unit having negative optical power, wherein the first lens unit is composed of two or less lens elements, the third lens unit is composed of five or more lens elements, and the condition: 5.0<f1/f3<8.0 (f1: a focal length of the first lens unit, f3: a focal length of the third lens unit) is satisfied.

Abstract: A photographic lens optical system includes: a first lens having a positive refractive power and a meniscus shape convex toward an object side; a second lens having a negative refractive power and a meniscus shape convex toward the object side; a doublet lens having a positive refractive power and formed by combining a third lens and a fourth lens; a fifth lens having a positive refractive power and a double convex shape; and a sixth lens having a positive refractive power and a double convex shape. The first to sixth lenses are sequentially arranged in a direction from the object side to an image side, and the photographic lens optical system satisfies the following condition: 1.5<Nd2<1.7 where Nd2 denotes a refractive index of the second lens.

Abstract: An imaging lens system includes a first lens to a fifth lens sequentially disposed from an object side to an image side. The first lens has a positive refractive power and an object side lens surface that is convex toward the object side. The second lens has a negative refractive power and a meniscus shape that is concave toward the image side. The third lens has a positive refractive power. The fourth lens has a negative refractive power and a meniscus shape that is concave toward the object side. The fifth lens has a negative refractive power and a meniscus shape that is concave toward the image side near an optical axis. The imaging lens system satisfies the following condition: f34/f<?5, where f denotes a focal length of the imaging lens system, and f34 denotes an effective focal length of the third lens and the fourth lens.

Abstract: This invention provides a photographing optical lens system comprising: a first lens element with negative refractive power; a second lens element with positive refractive power having a concave object-side surface at paraxial region and a convex image-side surface at paraxial region; a third lens element with positive refractive power having a concave object-side surface at paraxial region and a convex image-side surface at paraxial region; and a fourth lens element with positive refractive power having a convex object-side surface at paraxial region and a concave image-side surface at paraxial region and a convex shape at peripheral region, and both surfaces being aspheric. The photographing optical lens system further satisfies conditional expressions as specified.

Abstract: A wholly organic coating consisting of one or more layers of Py-BBL that is transparent in the IR region of the spectrum which is also thermally and oxdatively stable. This is coated onto IR transparent windows, domes and or optical lenses, for enhanced IR and signal filtering.

Abstract: An imaging lens includes first to fourth lens elements arranged from an object side to an image side in the given order. Through designs of surfaces of the lens elements and relevant lens parameters, a short system length of the imaging lens may be achieved while maintaining good optical performance.

Abstract: An optical imaging lens includes: a first, second, third and fourth lens element, the first lens element having an object-side surface with a convex portion in a vicinity of the optical axis, the second lens element having an object-side surface with a convex portion in a vicinity of the optical axis, and an image-side surface with a concave portion in a vicinity of its periphery, the third lens element having an image-side surface with a convex portion in a vicinity of the optical axis, the fourth lens element having an image-side surface with a concave portion in a vicinity of the optical axis, wherein the optical imaging lens set does not include any lens element with refractive power other than said first, second, third and fourth lens elements.

Abstract: An imaging lens includes first to fourth lens elements arranged from an object side to an image side in the given order. Through designs of surfaces of the lens elements and relevant lens parameters, a short system length of the imaging lens may be achieved while maintaining good optical performance.

Abstract: A zoom lens including, in order from an object side, positive, negative, positive, positive, and positive lens units, or positive, negative, positive, positive, positive, and positive lens units. 1.5<L2fm/L2W<500; ?30<f3/f2<?3; and ?15<f1/f23W<?8 are satisfied, where fm=fw×(Z)1/2, fw represents a focal length of the entire system at a wide angle end, Z represents a zoom ratio, L2W represents an interval between a second and third lens units at the wide angle end, L2fm represents an interval between the second and third lens units at a zoom position at which an offaxial principal ray having a largest image height is highest farthest from an optical axis on a lens surface disposed on the most object side in the first lens unit in a zoom range from the wide angle end to the focal length fm, f1, f2 and f3 respectively represent focal lengths of the first, second, and third lens units, and f23W represents a combined focal length of the second and third lens unit at the wide angle end.

Abstract: A variable-magnification optical system has five lens groups, namely, from object side, positive, negative, positive, positive, and negative lens groups, and achieves magnification variation by varying all axial distances between the lens groups. Focusing is achieved by moving the fourth lens group in optical axis direction. Vibration correction is achieved by moving all or part of the fifth lens group perpendicularly to optical axis. Fulfilled are formulae 4.0<|f1/f2|<6.0, 1.0<f4/f1<1.5, and 2.0<|f4/fv|<4.0, f1 representing a focal length of the first lens group, f2 a focal length of the second lens group, f4 a focal length of the fourth lens group, and fv a focal length of the vibration correction group.

Abstract: A zoom lens system, in order from an object side to an image side, comprising: a first lens unit having positive optical power; a second lens unit having negative optical power; a third lens unit having positive optical power; a fourth lens unit having negative optical power, a fifth lens unit having negative optical power; and a sixth lens unit having positive optical power, wherein the condition: 3.5<|f6/f2|<15.5 (f2: a focal length of the second lens unit, f6: a focal length of the sixth lens unit) is satisfied.

Abstract: A variable magnification optical system consists of a negative first lens group, a stop that is fixed relative to an image plane during magnification change, and a positive second lens group, which are in this order from an object side. A distance between the first lens group and the second lens group in an optical axis direction becomes shorter when magnification is changed from a wide-angle end to a telephoto end. The first lens group consists of a positive lens having a convex object-side surface and two negative lenses, in this order from the object side. The variable magnification optical system satisfies the following formula (1) about Abbe number ?d1 of the positive lens in the first lens group for d-line: 25.5<?d1<50??(1).

Abstract: A microscope assembly includes an illumination source coupled to an optical assembly by a coupler. The optical assembly includes an objective with optics that move along an optic axis. The illumination source generates a light blade that illuminates a portion of a sample at an illumination plane. The light blade induces a fluorescent emission from the sample that is projected through the objective optics to a detector. The focal plane of the objective optics is fixed with respect to the illumination source by the coupler so that the illumination plane is coincident with the focal plane as the objective optics move along the optic axis. The objective and illumination may be rapidly scanned along the optic axis to provide rapid three-dimensional imaging while the objective and illumination may also be rapidly scanned along the optic axis to provide rapid three-dimensional imaging.

Abstract: An optical lens system comprises, 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. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region. The second lens element with refractive power has an image-side surface being convex in a paraxial region. The third lens element with positive refractive power has an aspheric object-side surface being concave in a paraxial region and an aspheric image-side surface being convex in a paraxial region. The fourth lens element with refractive power has an aspheric object-side surface being concave in a paraxial region and an aspheric image-side surface being convex in a paraxial region. There are a total of four lens elements with refractive power in the optical lens system.

Abstract: A device for optically imaging at least part of an object onto an area of a digital image sensor includes an optical channel, which includes a first imaging lens arranged on a first substrate, a second imaging lens arranged on a second substrate, and a field lens arranged on a third substrate. The first and second imaging lenses are identical and arranged such that a first surface of the first imaging lens is a light entry surface of the optical channel and that a first surface of the second imaging lens is a light exit surface of the optical channel. The field lens is arranged between the first imaging lens and the second imaging lens such that an axis running perpendicularly to the lateral extension of the optical channel and through a lateral center of the field lens forms a symmetry axis of the optical channel.