Abstract: The present disclosure discloses a camera optical lens. The camera optical lens including, in an order from an object side to an image side, a first lens, a second lens having a positive refractive power, a third lens having a negative refractive power, a fourth lens, a fifth lens, and a sixth lens. The first lens is made of plastic material, the second lens is made of plastic material, the third lens is made of plastic material, the fourth lens is made of plastic material, the fifth lens is made of plastic material, and the sixth lens is made of glass material. The camera optical lens further satisfies specific conditions.

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, wherein both surfaces thereof are aspheric, and at least one surface thereof has an inflection point. 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 imagining quality for use in compact cameras.

Abstract: An optical imaging lens set from an object side toward an image side along an optical axis in order includes: a first lens element having an image-side surface with a convex portion in a vicinity of its circular periphery, a second lens element having an object-side surface with a convex portion in a vicinity of its optical axis, a third lens element having an object-side surface with a concave portion in a vicinity of its optical axis, a fourth lens element with positive refractive power, and a plastic fifth lens element having an image-side surface with a concave portion in a vicinity of its optical axis.

Abstract: A zoom lens includes, in order from an object side to an image side along an optical axis, a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a negative refractive power, a fourth lens group having a positive refractive power, and a fifth lens group having a positive refractive power.

Abstract: Provided is a zoom lens, including, in order from an object side to an image side: a first lens unit having a positive refractive power which does not move; a second lens unit having a negative refractive power which moves during zooming and focusing; a third lens unit having the negative refractive power which moves during zooming; a fourth lens unit having one of the negative refractive power and the positive refractive power; and a fifth lens unit having the positive refractive power, in which a lateral magnification (?2w) of the second lens unit at a wide angle end when an object distance is infinity, and a ratio of a focal length (f2) of the second lens unit and a focal length (f3) of the third lens unit are appropriately set.

Abstract: Present embodiments provide for a mobile device and an optical imaging lens thereof. The optical imaging lens comprises five lens elements positioned sequentially from an object side to an image side. Though controlling the convex or concave shape of the surfaces and/or the refracting power of the lens elements, the optical imaging lens shows better optical characteristics and the total length of the optical imaging lens is shortened.

Abstract: An optical imaging lens includes, from an object side to an image side, an aperture stop, first, second, third, fourth, and fifth lens elements. The first lens element has a positive refracting power, its object-side surface has a convex portion in a vicinity of an optical axis, and its image-side surface has a concave portion in the vicinity of the optical axis. The second lens element has a negative refracting power, and its image-side surface is concave. The fourth lens element has a convex image-side surface. The object-side surface of the fifth lens element has a convex portion in the vicinity of the optical axis, and the image-side surface of the fifth lens element has a concave portion in the vicinity of the optical axis.

Abstract: An optical image 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 and a fifth lens element. The first lens element with positive refractive power has a convex object-side surface and a convex image-side surface. The second lens element with refractive power has a concave object-side surface and a convex image-side surface. The third lens element with refractive power has two surfaces being aspheric. The fourth lens element with positive refractive power has a convex image-side surface, wherein the surfaces of the fourth lens element are aspheric. The fifth lens element with negative refractive power has a concave image-side surface, wherein the surfaces of the fifth lens element are aspheric, and the fifth lens element has inflection points on at least one of the surfaces thereof.

Abstract: An image capturing optical system 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 and a fifth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element with negative refractive power has a concave object-side surface and a convex image-side surface. The third lens element has refractive power, wherein the surfaces of the third lens element are aspheric. The fourth lens element has positive refractive power, wherein the surfaces of the fourth lens element are aspheric. The fifth lens element with refractive power is made of plastic material, and has a concave image-side surface, wherein the surfaces of the fifth lens element are aspheric, and the fifth lens element has inflection points formed on at least one of the surfaces thereof.

Abstract: An optical image lens system 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 and a fifth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element with negative refractive power has a concave object-side surface and a convex image-side surface. The third lens element with negative refractive power has a concave image-side surface. The fourth lens element with refractive power has a concave object-side surface and a convex image-side surface, wherein the surfaces of the fourth lens element are aspheric. The fifth lens element with negative refractive power has a concave image-side surface, wherein the surfaces of the fifth lens element are aspheric, and the fifth lens element has inflection points formed on at least one of surface thereof.

Abstract: This invention provides an image capturing lens system in order from an object side to an image side comprising five lens elements with refractive power: a first lens element with positive refractive power having a convex object-side surface; a second lens element with negative refractive power; a third lens element with both the object-side and image-side surfaces thereof being aspheric; a plastic fourth lens element with both the object-side and image-side surfaces thereof being aspheric; and a plastic fifth lens element having a concave image-side surface, both the object-side and image-side surfaces thereof being aspheric, and at least one inflection point is formed on at least one of the object-side and image-side surfaces thereof. By such arrangement, the lens system of the invention has larger chief ray angle, and thereby not only the total track length of the system can be reduced, but also better image quality can be obtained.

Abstract: A large caliber standard lens having a first lens of a positive refractive power; a second lens of a negative refractive power; a diaphragm; a third lens of a negative refractive power; a fourth lens of a positive refractive power; and a fifth lens of a positive refractive power, wherein the lenses are arranged sequentially from an object side to an image side, and the first lens, the second lens, the third lens, and the fourth lens are meniscus lenses having concave surfaces facing the diaphragm and satisfy the following inequality, 0.6 ? ? R 6 R 4 ? ? 1.0 where R4 represents the radius of curvature of the surface of the second lens facing the image, and R6 represents the radius of curvature of the surface of the third lens facing the object.

Abstract: A photographing optical lens assembly includes, in order from an object side to an image side: a first lens element with positive refractive power, a second lens element with negative refractive power having a convex object-side surface and a concave image-side surface, a third lens element having a concave image-side surface, wherein at least one of the object-side surface and the image-side surface of the third lens element is aspheric, a fourth lens element with positive refractive power having a convex image-side surface, wherein at least one of the object-side surface and the image-side surface of the fourth lens element is aspheric, and a fifth lens element with negative refractive power having a concave image-side surface, wherein at least one of the object-side surface and the image-side surface of the fifth lens element is aspheric.

Abstract: A zoom lens comprises first and fourth units which don't move for zooming, and second and third units moved during zooming. The first unit includes a front side partial unit which don't move for focusing, a movable partial unit moved for focusing, and a rear side partial unit which don't move for focusing, the rear side partial unit includes positive lenses and one or more negative lenses, and the following conditions are satisfied: ?1.2×10?3<(?pa??n)/(?pa??n), and ?n<30, where ?n is the smallest Abbe number of the material of the negative lenses, ?n is the partial dispersion ratio of the material of the negative lens of the smallest Abbe number, ?pa is the average of the Abbe numbers ? of the materials of positive lenses, and ?pa is the average of the partial dispersion ratio ? of the materials of the positive lenses.

Abstract: An image pickup optical lens assembly, sequentially arranged from an object side to an image side along an optical axis, comprises the first lens element with positive refractive power having a convex object-side surface, the second lens element with negative refractive power having a concave object-side surface and a convex image-side surface, the third lens element with refractive power, the fourth lens element with positive refractive power having a concave object-side surface and a convex image-side surface, the fifth lens element with negative refractive power having a concave image-side surface with at least one inflection point, and a stop. Each of the five lens elements may be made of plastic with bi-aspherical surfaces. Additionally, the image pickup optical lens assembly satisfies conditions of shortening the total length and reducing the sensitivity for usage in compact cameras and mobile phones with camera functionalities.

Abstract: An optical system comprising two lens cells, each lens cell comprising multiple lens elements, to provide imaging over a very wide image distance and within a wide range of magnification by changing the distance between the two lens cells. An embodiment also provides scannable laser spectroscopic measurements within the field-of-view of the instrument.

Abstract: The present invention provides an imaging lens assembly including, in order from an object side to an image side: a first lens element with positive refractive power having a convex object-side surface; a second lens element with negative refractive power; a third lens element with negative refractive power; a fourth lens element with positive refractive power having a convex object-side surface; a fifth lens element having a concave image-side surface, at least one inflection point being provided on the fifth lens element; and an aperture stop disposed between an imaged object and the third lens element. Such an arrangement of optical elements can effectively improve the image quality of the system and enable the imaging lens assembly to maintain a compact form. When the aperture stop is disposed near the object side, the telecentric feature is emphasized, resulting in a shorter total track length.

Abstract: The present invention provides an imaging lens system comprising, in order from an object side to an image side: a first lens element with positive refractive power having a convex object-side surface; a second lens element with negative refractive power; a third lens element with positive refractive power, at least one of the object-side and image-side surfaces thereof being aspheric; a fourth lens element, the image-side surface thereof being aspheric and provided with at least one inflection point; a fifth lens element having a concave object-side surface, at least one of the object-side and image-side surfaces thereof being aspheric; and an aperture stop disposed between an imaged object and the second lens element. Such an arrangement of optical elements can effectively reduce the total track length and sensitivity of the optical system, and image quality can also be improved.

Abstract: An imaging optical system includes: an object-side lens group having, in order from its object side, an object-side positive meniscus lens that is convex on its object side and has positive refracting power, and an object side negative meniscus lens that is convex on its object side and has negative refracting power; and image-side lens group having, in order from its object side, an image-side negative lens, an image-side first positive lens and an image-side second positive lens. The image-side negative lens and the image-side first positive lens adjacent thereto form together a cemented doublet.

Abstract: A rear-focusing type zoom lens includes, in order from an object side, a positive first group being fixed, a negative second group moving toward an image plane along an optical axis during zooming from a wide-angle end to a telephoto end; a negative third group being fixed in an optical axis direction, and a positive fourth group moving along the optical axis direction to correct image plane variation being caused by zooming. The first group includes a first subgroup having a negative power as a whole and a second subgroup having a positive power as a whole. The first subgroup includes a negative meniscus lens having a convex surface directed toward the object side and a negative lens. The second subgroup includes a positive lens group having at least one positive lens, a negative lens, a positive lens, and another positive lens group having at least one positive lens.

Abstract: Provided from the object side are a first lens group (11) having a positive refracting power and fixed to the image plane, a second lens group (12) having a negative refracting power and a magnification varying action exhibited when moving along the optical axis, a third lens group (13) fixed to the image plane and having a positive refracting power, and a fourth lens group (14) movable along the optical axis so as to maintain the image plane moving with the movements of the second lens group (12) and of the object in a fixed position from a reference plane. Hence the movement of the image due to camera shake is corrected by moving the whole third lens group (13) vertically to the optical axis. The size is reduced and the aberrations are small because the whole groups whose optical performance is united are decentered.

Abstract: An exemplary projection lens includes, in this order from the magnification side to the minification side thereof, a negative lens group of negative fraction power, and a positive lens group of positive fraction power. The projection lens satisfies the formulas of: ?2.5<F1/F<?1.5; and 1.3<F2/F<1.5, where F1, F2, and F respectively represent the effective focal lengths of the negative lens group, the positive lens group, and the projection lens.

Abstract: There is disclosed a zoom lens having small variations of aberration and field angle during focusing and having a small system as a whole. The zoom lens includes a first lens unit having a positive optical power, a second lens unit having a negative optical power, a third lens unit having a negative optical power, a fourth lens unit having a positive optical power, and a fifth lens unit having a positive optical power, in order from an object side to an image side. During zooming, the second lens unit and third lens unit are moved, and during focusing, the fifth lens unit is moved. The fifth lens unit consists of one negative lens element and two positive lens elements in order from the object side to the image side, and the following conditions are satisfied: 0<?5<0.35 1.85<?5p/?5n.

Abstract: The zoom lens has, in order from the object to image sides, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, and a fourth lens unit having a positive refractive power, wherein the second lens unit and the fourth lens unit move during zooming. The following condition is satisfied: ?23<20.0, N23>1.9, ?1.0<f2/f2t<?0.05, where f2 represents a focal length of the second lens unit, ft represents a focal length of the entire system at a telephoto end zoom position, and ?23 and N23 represent an Abbe number and a refractive index of the material forming the third lens of the second lens unit, respectively.

Abstract: A projection optical system that projects an image on a first side onto a second plane through a plurality of lenses includes the following elements in order from the first side to the second plane: a first lens group that has a negative refractive power, a second lens group that has a positive refractive power, a third lens group that has a negative refractive power, a fourth lens group that has an aperture stop in the optical path, and a fifth lens group that has a positive refractive power. A clear aperture of a lens surface or an outer diameter of a lens in the projection optical system has a relative maximum in the second lens group, a relative minimum in the third lens group, and a relative maximum in the third-fifth lens groups, and has only one significant minimum between the first side and the second plane.

Abstract: A projection optical system is disclosed that includes six lens groups, four of which are positioned in pairs symmetrically about a stop. The second and fifth lens groups, in order from the object side, may be positioned symmetrically about the stop but are also adjustable asymetrically about the stop in order to adjust the magnification of the projection optical system. The first and sixth lens groups, in order from the object side, function to make the projection optical system substantially telecentric on both the object side and the image side, respectively. Also disclosed is a projection and light exposure apparatus that uses the projection optical system of the present invention. The projection and light exposure apparatus automatically detects the image magnification and, based on the detection result, adjusts the positions of the second and fifth lens groups G2 and G5 as a unit so as to maintain a specified magnification.

Abstract: A collimator lens comprises, successively from a parallel luminous flux side, a first lens having a positive refracting power, second and third lenses having a negative composite refracting power, a fourth lens having a positive refracting power, and a fifth lens having a positive refracting power. The second and third lenses are cemented together. One of the second and third lenses has a negative refracting power, whereas the other has a positive refracting power. The collimator lens further satisfies Bƒ/ƒ>0.6, where Bf is the back focus of the whole lens system, and f is the focal length of the whole lens system.

Abstract: A zoom lens having only five lens groups of positive, negative, negative, positive and positive refractive power, respectively, in order from the object side. The focal distance is varied by shifting the second and third lens groups, in order from the object side, along the optical axis, and a middle sub-assembly in the first lens group is shifted along the optical axis in order to correct for what otherwise would be a shifting in the image plane as the distance to the object is varied. The first lens group is formed of three sub-assemblies, with the sub-assembly nearest the object side having negative refractive power and being fixed in position, the middle sub-assembly having positive refractive power and shifting as discussed above, and the sub-assembly nearest the image-side having positive refractive power and being fixed in position.

Abstract: A taking lens system has, from the object side, a front lens unit, an aperture stop, and a rear lens unit. The front lens unit is composed of two lens elements that are, from the object side, a positive glass element and a negative plastic lens element. The rear lens unit has a positive plastic lens element disposed at the image-side end thereof. On the object side of this positive plastic lens element is disposed solely a lens element made of glass.

Abstract: A compact, high-zoom-ratio, high-performance five-group zoom lens having a positive-negative-negative-positive-positive refractive power arrangement. The zoom lens has the ability to focus at close range with minimal movement of the internal lens groups. Each lens group is axially movable, with the second or third lens group available for close-range focusing. The first lens group includes one negative lens element and two positive lens elements. The second lens group includes two negative lens elements and one positive lens element. The third lens group includes one negative lens element and one positive lens element. The fourth lens group includes two positive lens elements and one negative lens element. And, the fifth lens group includes three positive lens elements and two negative lens elements. An aperture stop is disposed imagewise of the third lens group and objectwise of the fifth lens group. The zoom lens preferably satisfies at least one of a number of design conditions.

Abstract: An exposure apparatus for transferring a pattern on a mask (M) onto a photosensitive substrate (W) via a projection-optical system can reduce gas fluctuation even if the length of the optical path through gas is relatively long, and even if the diameter of light flux through the gas is relatively large.The projection-optical system satisfies the condition ##EQU1## where .lambda. is a wavelength of exposure light used in the apparatus, .SIGMA.i is a summary of gas sections i in an optical path from the mask to the photosensitive substrate, Li is a length of a gas section i along the optical axis, in m, and Ri is an average of a mask-side diameter and a substrate-side diameter of a light flux in each gas section, the light flux emerging from a maximum image height and advancing within meridional plane, wherein at least one gas section i is filled with helium or neon.

Abstract: A high-performance zoom lens having a long back focus and thus ideally suited to electronic imaging equipment. The zoom lens comprises a first lens group G1 having positive refractive power, a second lens group G2 having negative refractive power, a third lens group G3 having negative refractive power, a fourth lens group G4 having positive refractive power, and fifth lens group G5 having positive refractive power. When zooming from the maximum wide-angle state to the maximum telephoto state, the air space between first lens group G1 and second lens group G2 increases, the air space between second lens group G2 and third lens group G3 changes linearly or non-linearly, and the air space between fourth lens group G4 and fifth lens group G5 changes linearly or non-linearly. The zoom lens preferable satisfies at least one of a number of design conditions.

Abstract: The present invention provides an zoom lens with an anamorphic converter that is small, light weight, has high precision, and also high performance. The zoom lens includes, in order from the object side, a first lens group with positive refractive power, a second lens group with negative refractive power, a third lens group with positive and negative refractive power, a fourth lens group with positive refractive power, and a fifth lens group with positive refractive power. The second lens group moves along the optical axis and first lens group is fixed along the optical axis when zooming from the maximum wide-angle state to the maximum telephoto state.

Abstract: A telephoto zoom lens, sequentially from an object, comprising: a first lens group having positive refracting power; a second lens group having negative refracting power; a third lens group having negative refracting power; a fourth lens group having positive refracting power; and a fifth lens group having negative refracting power. During variable power from a wide-angle end to a telephoto end, the lens groups move so that a space dimension between the first and second lens groups increases, a space dimension between the second and third lens groups changes linearly or nonlinearly, and a space dimension between the fourth and fifth lens groups decreases. The zoom lens satisfies various conditions.

Abstract: A zoom lens system comprising at least five lens units, in order from the object side, of a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a negative refractive power, a fourth lens unit having a positive refractive power and a fifth lens unit having a positive refractive power. This zoom lens system is configured so as to change a magnification thereof by moving the first through fifth lens units, and has wide field angles, a high vari-focal ratio and a compact size.

Abstract: A camera lens with a relative aperture of 1:1.4 and a focal length of 35 mm has five components. The first component includes a cemented element which is concave on the object side. The second component includes a cemented element which has an aspherical convex surface on the object side. The third component serves as an individual lens. The fourth component includes a cemented element which is concave on the object side. The fifth component has a cemented element which includes a concave surface on the image side and an aspherical convex surface on the object side.