Patent application number | Description | Published |
20080204902 | ZOOM LENS SYSTEM AND OPTICAL APPARATUS INCLUDING THE SAME - A zoom lens system includes a first lens unit having a negative refractive power, at least one lens unit having a positive refractive power, and an optical element composed of a material having an Abbe number and a partial dispersion that satisfy a predetermined condition. The first lens unit, an aperture stop, and the at least one lens unit are arranged in this order from the object side to the image side. The zoom lens system performs zooming while changing the distance between the lens units. The focal length f | 08-28-2008 |
20090296233 | ZOOM LENS SYSTEM AND CAMERA INCLUDING THE SAME - Disclosed is a zoom lens system in which a first lens unit having negative optical power and a second lens unit having positive optical power are arranged in the stated order from an object side to an image side, and in which an interval between the first lens unit and the second lens unit changes in zooming. In such a zoom lens system, the first lens unit includes a first lens component having negative optical power, a second lens component joined to a lens surface of the first lens component, and a third lens component having positive optical power so as to provide the zoom lens system having excellent optical performance by appropriately setting a material forming the first lens component. | 12-03-2009 |
20100284093 | ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME - A zoom lens comprises a first lens group having a negative refractive power and a second lens group having a positive refractive power in order from object to image sides, an interval between the first and second lens groups changes in a zoom operation, the first lens group is constituted by negative and positive lenses in order from the object to image sides, the negative and positive lenses of the first lens group are arranged at intervals, the second lens group is constituted by three lenses including positive and negative lenses in order from the object to image sides, and a radius of curvature of a lens surface at the object side of the negative lens constituting the first lens group, a shape of a negative lens having the maximum refractive power constituting the second lens group, and a refractive power of the second lens group are appropriately set. | 11-11-2010 |
20110090571 | ZOOM LENS AND IMAGE PICKUP DEVICE INCLUDING THE SAME - A zoom lens includes, a plurality of lens units arranged along an optical axis and configured to move from a wide angle end to a telephoto end during a zooming operation of the zoom lens; a first refractive power variable element whose refractive power is changed in a positive direction by changing shapes of boundary surfaces of different media when zooming from the wide-angle end to the telephoto end; and a second refractive power variable element whose refractive power is changed in a negative direction by changing shapes of boundary surfaces of different media when zooming from the wide-angle end to the telephoto end. When zooming from the wide-angle end to the telephoto end, imaging magnifications of the first refractive power variable element and the second refractive power variable element are increased. | 04-21-2011 |
20110176223 | ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE ZOOM LENS - A zoom lens includes, in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, and a subsequent lens unit including at least two lens units. An interval between respective adjacent lens units varies for zooming. The first lens unit includes a positive lens and a negative lens. A deviation, from a standard line, of a material of a negative lens GLn, whose relative partial dispersion of a material (θgF) is the lowest of relative partial dispersions of materials of other lenses included in the first lens unit (ΔθgF | 07-21-2011 |
20110222165 | ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME - A zoom lens comprises a first lens group having a negative refractive power and a second lens group having a positive refractive power in order from object to image sides, an interval between the first and second lens groups changes in a zoom operation, the first lens group is constituted by negative and positive lenses in order from the object to image sides, the negative and positive lenses of the first lens group are arranged at intervals, the second lens group is constituted by three lenses including positive and negative lenses in order from the object to image sides, and a radius of curvature of a lens surface at the object side of the negative lens constituting the first lens group, a shape of a negative lens having the maximum refractive power constituting the second lens group, and a refractive power of the second lens group are appropriately set. | 09-15-2011 |
20110292520 | ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - A zoom lens includes a first variable refractive power element that changes a refractive power thereof in a positive direction by changing a shape of an interface between different media during zooming from a wide angle end to a telephoto end; and a second variable refractive power element that changes a refractive power thereof in a negative direction by changing a shape of an interface between different media during zooming from a wide angle end to a telephoto end. An imaging magnification of at least one of the variable refractive power elements increases during zooming from the wide angle end to the telephoto end. Variations in chromatic aberration and other distortions are controlled when predetermined conditional expressions are satisfied. | 12-01-2011 |
20120013994 | ZOOM LENS AND IMAGE PICKUP APPARATUS EQUIPPED WITH ZOOM LENS - A zoom lens includes, in order from an object side to an image side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, a third lens unit having a negative refractive power, and a fourth lens unit having a positive refractive power. A distance between consecutive lens units of the first through fourth lens units varies for zooming. The first lens unit includes, in order from the object side to the image side, a negative lens and a positive lens whose surface on the object side has a convex shape. In the zoom lens, a focal length f | 01-19-2012 |
20120229915 | ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME - A zoom lens includes, in order from an object side to an image side, a first lens unit having a negative refractive power and a second lens unit having a positive refractive power. A distance between the first lens unit and the second lens unit varies during zooming. The first lens unit includes, in order from the object side to the image side, a negative lens and a positive lens of which an object-side lens surface has a convex shape. An Abbe number of a material of the positive lens of the first lens unit, a focal length of the first lens unit, a distance between an image-side lens surface of the first lens unit and an object-side lens surface of the second lens unit at a telephoto end, and focal lengths of the entire zoom lens at a wide-angle end and the telephoto end are appropriately set. | 09-13-2012 |
20120314299 | ZOOM LENS AND IMAGE PICKUP APPARATUS EQUIPPED WITH ZOOM LENS - A zoom lens includes, a first lens unit of a positive refractive power, a second lens unit of a negative refractive power, a reflective element, and a rear lens group including two or more lens units and an aperture stop, in which the first lens unit, the second lens unit, and two or more lens units of the rear lens group are moved while the reflective element is stationary during zooming, wherein movement amounts M1 and M2 of the first and second lens units during zooming, a movement amount Ms of the aperture stop, and focal lengths fw and ft of the entire zoom lens at the wide-angle end and the telephoto end, respectively, lateral magnifications β2w and β2t of the second lens unit, a distance LSw from the first lens surface to the aperture stop at the wide-angle end are appropriately set. | 12-13-2012 |
20130120853 | ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - Provided is a zoom lens comprising, in order from an object side to an image side, a first lens unit having positive refracting power; a second lens unit having negative refracting power; a third lens unit having positive refracting power; a fourth lens unit having negative refracting power; and a fifth lens unit having positive refracting power, wherein the lens units move when zooming from the wide-angle end to the telephoto end; the third lens unit and the fifth lens unit move together when zooming; the fifth lens unit includes an aperture stop in the optical path thereof; the third lens unit or the fourth lens unit moves during focusing; and the following conditional expression is satisfied: 0.5<|f | 05-16-2013 |
20130162884 | ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME - A zoom lens includes a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, a third lens unit having a negative refractive power, and a fourth lens unit having a positive refractive power, disposed in order from an object side to an image side, and an aperture stop between a lens surface closest to the object side of the second lens unit and a lens surface closest to the object side of the third lens unit, the third lens unit is moved to the image side during a focusing operation from an infinite object to a short distance object, the first lens unit is configured by at most two negative lenses and one positive lens, the third lens unit is configured by a single lens or a cemented lens, and an appropriate conditional expression are met. | 06-27-2013 |
20130286257 | ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME - A zoom lens includes first to fifth lens unit having negative, positive, positive, negative, and positive refractive powers, in an order from an object side to an image side, an interval of each lens unit is configured to be changed in zooming, the first lens unit, in order from the object side to the image side, consists of one or two negative lenses and one positive lens, the second lens unit consists of one lens component that moves to the image side in focusing on an object at an infinite distance to a short distance object, and an interval D23, combined focal lengths D23w, f23w, and f4Rw, and a length D2 are appropriately set. | 10-31-2013 |
20130335830 | ZOOM LENS AND OPTICAL APPARATUS EQUIPPED WITH ZOOM LENS - A zoom lens includes, in order from object side to image side, a positive first lens unit, a negative second lens unit, a positive third lens unit, a negative fourth lens unit, and a rear lens unit including, in order from object side to image side, a positive first lens subunit, a negative second lens subunit, and a positive third lens subunit. The relationship between the combined focal length of the first and second lens units at wide-angle end, the combined focal length of the third lens unit and the lens units on the image side of the third lens unit at wide-angle end, the focal length of the second lens subunit, and the focal length of the rear lens unit at telephoto end is appropriately set. | 12-19-2013 |
20130342749 | ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME - A zoom lens includes, in order from an object side to an image side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, and a third lens unit having a negative refractive power. Each distance between two adjacent lens units varies during at least one of zooming and focusing. The first lens unit and the second lens unit move during zooming so that a distance between the first lens unit and the second lens unit at a telephoto end is shorter than that at a wide-angle end. The third lens unit moves during the focusing. Each lens unit includes at least one positive lens and at least one negative lens. Predetermined conditions are satisfied. | 12-26-2013 |
20140009841 | ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME - A zoom lens consists of, in order from an object side to an image side, a first lens unit having negative refractive power, a second lens unit having positive refractive power, and a third lens unit having negative refractive power. The first lens unit and the second lens unit move during zooming to make a distance between the first lens unit and the second lens unit larger at a telephoto end than at a wide-angle end. The third lens unit consists of, in order from the object side to the image side, a first lens subunit having positive refractive power and a second lens subunit having negative refractive power, and the second lens subunit moves toward the image side during focusing from an infinite-distance object to a near-distance object. | 01-09-2014 |
20140063613 | ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME - A zoom lens includes, in order from an object side to an image side, a first lens unit having positive refractive power, a second lens unit having negative refractive power, a reflecting unit for bending an optical path, and a rear lens group including two or more lens units, wherein, during zooming, the first and second lens units are moved and the reflecting unit is not moved, and wherein an amount of movement of the first lens unit during zooming from a wide-angle end to a telephoto end, a distance on an optical axis from a reflecting surface of the reflecting unit to an image plane, a distance on the optical axis from a lens surface of the second lens unit closest to the image side to the reflection surface of the reflecting unit at the wide-angle end, and a focal length of the second lens unit are appropriately set. | 03-06-2014 |
20140085513 | ZOOM LENS, IMAGE-PICKUP APPARATUS HAVING THE SAME, AND IMAGE PROJECTION APPARATUS HAVING THE SAME - The zoom lens includes, in order from an object side to an image side, a first lens unit having a negative refractive power, a rear unit including one or more lens units, a distance between every adjacent lens units varies during zooming, and an aperture diaphragm on the image side of the first lens unit, a combined focal length of the rear unit at a wide-angle end being positive. One lens unit LG on the object side of the aperture diaphragm is made of a solid material, and includes an optical element GnNL having a negative refractive power and another optical element having a positive refractive power, and the predetermined conditions are satisfied. | 03-27-2014 |