Patent application number | Description | Published |
20090257131 | Zoom lens and image pickup apparatus equipped with same - An apparatus has a zoom lens and an image pickup element disposed on the image side of the zoom lens that converts an optical image formed by the zoom lens into an electrical signal. The zoom lens includes, in order from the object side to the image side, a negative first lens unit, a negative second lens unit, a positive third lens unit, and a negative fourth lens unit. During zooming from the wide angle end to the telephoto end, the distance between the first lens unit and the second lens unit changes, the distance between the second lens unit and the third lens unit changes, and the distance between the third lens unit and the fourth lens unit changes, the distance between the second lens unit and the third lens unit being smaller at the telephoto end than at the wide angle end. The first lens unit includes a reflecting surface that deflects the optical path, and the zoom lens satisfies the following condition (1): −10010-15-2009 | |
20100007966 | Zoom lens and image pickup apparatus equipped with same - A zoom lens includes, in order from the object side thereof, a first lens unit having a positive refracting power, which is movable during zooming, a second lens unit having a negative refracting power, which is movable during zooming, a third lens unit having a positive refracting power, which is movable during zooming, a fourth lens unit having a positive refracting power, which is movable during zooming, a fifth lens unit having a positive refracting power, which is movable or stationary during zooming. The zoom lens further includes an aperture stop that moves integrally with the third lens unit during zooming. The first lens unit is located closer to the object side at the telephoto end than at the wide angle end, and the third lens unit is located closer to the object side at the telephoto end than at the telephoto end. The first lens unit is composed of only one cemented lens made up of a negative lens element and a positive lens element arranged in order from the object side, and the third lens unit includes at least two positive lens elements. The zoom lens satisfies a certain condition. | 01-14-2010 |
20100046086 | Zoom lens and image pickup apparatus equipped with same - A zoom lens includes, in order from its object side, a first lens unit having a negative refracting power, a second lens unit having a positive refracting power, and a third lens unit having a refracting power. During zooming from the wide angle end to the telephoto end, the distance between the first lens unit and the second lens unit decreases, the distance between the second lens unit and the third lens unit changes. The first lens unit includes, in order from the object side, a first lens element, which is a negative lens element, and a second lens element, which is a positive lens element. The negative lens element and the positive lens element satisfy specific conditions. | 02-25-2010 |
20100053767 | Zoom lens and image pickup apparatus - A zoom lens includes, in order from its object side, a first lens unit having a negative refracting power, a second lens unit having a positive refracting power, a third lens unit having a negative refracting power, and a fourth lens unit having a positive refracting power. The zoom lens further includes an aperture stop disposed between the first lens unit and the third lens unit. During zooming from the wide angle end to the telephoto end, distances between the lens units change, the first lens unit moves first toward the image side and thereafter toward the object side, the second lens unit moves in such a way as to be located closer to the object side at the telephoto end than at the wide angle end, the distance between the second lens unit and the third lens unit is larger at the telephoto end than at the wide angle end, and the aperture stop moves in such a way as to be located closer to the object side at the telephoto end than at the wide angle end. The second lens unit and the third lens unit satisfy certain conditions. | 03-04-2010 |
20100091381 | Zoom lens and image pickup apparatus equipped with same - A zoom lens has a plurality of lens units including, in order from its object side to image side, a first lens unit having a negative refracting power composed of two lens elements including a biconcave negative lens and a positive lens, and a second lens unit having a positive refracting power composed of four lens elements including a positive lens and a negative lens. During zooming from the wide angle end to the telephoto end, a distance between the lens units changes, and the second lens unit moves toward the object side. The zoom lens has an aperture stop that moves integrally with the second lens during the zooming and satisfies a specific condition. | 04-15-2010 |
20120008215 | Zoom Lens and Image Pickup Apparatus Equipped with Same - A zoom lens has a plurality of lens units including, in order from its object side to image side, a first lens unit having a negative refracting power composed of two lens elements including a biconcave negative lens and a positive lens, and a second lens unit having a positive refracting power composed of four lens elements including a positive lens and a negative lens. During zooming from the wide angle end to the telephoto end, a distance between the lens units changes, and the second lens unit moves toward the object side. The zoom lens has an aperture stop that moves integrally with the second lens during the zooming and satisfies a specific condition. | 01-12-2012 |
20120133802 | IMAGING OPTICAL SYSTEM AND IMAGE-ACQUISTION APPARATUS - Provided is an imaging optical system and an image acquisition apparatus that can be suitably used in a small-diameter endoscope while having an ultra-wide angle of view. | 05-31-2012 |
20130070070 | Diffractive Optical Element and Endoscope - Provided is a diffractive optical element that is formed by laminating two optical material layers formed of different energy-cured resins; in which a relief pattern is formed at the interface between the two optical material layers; and that satisfies the following conditional expressions: | 03-21-2013 |
20130215523 | Optical System for Endoscope - An optical system for an endoscope includes a negative lens-group, an aperture diaphragm and a positive lens-group in this order from an object side, wherein the negative lens-group includes a negative first-lens and a negative second-lens in this order from the object side; and wherein the optical system meets conditional expressions (1) and (2): | 08-22-2013 |
20130242164 | Zoom Lens and Image Pickup Apparatus Equipped with Same - A zoom lens has a plurality of lens units including, in order from its object side to image side, a first lens unit having a negative refracting power composed of two lens elements including a biconcave negative lens and a positive lens, and a second lens unit having a positive refracting power composed of four lens elements including a positive lens and a negative lens. During zooming from the wide angle end to the telephoto end, a distance between the lens units changes, and the second lens unit moves toward the object side. The zoom lens has an aperture stop that moves integrally with the second lens during the zooming and satisfies a specific condition. | 09-19-2013 |
20140307329 | Endoscope Objective Optical System - To off-axis and on-axis aberrations at low cost while having a wide angle of view, an endoscope objective optical system ( | 10-16-2014 |
20150042773 | Endoscopic Objective Optical System and Imaging Apparatus - To allow placement of optical members by providing a long back focus, make aberrations less subject to manufacturing errors, and reduce variations in aberrations during focusing. An endoscopic objective optical system includes, in order from an object side, a front group with negative refractive power, a focusing lens, and a rear group with positive refractive power, wherein: the endoscopic objective optical system satisfies conditional expressions (1) to (4) below: | 02-12-2015 |
20150085376 | Endoscope Optical System - An endoscope optical system has a first lens group having positive refractive power, an aperture diaphragm, a second lens group having negative refractive power and a third lens group having positive refractive group, the second lens group moving along an optical axis to perform focusing, the first lens group having a first lens having negative refractive power and a second lens having positive refractive power, and the optical system satisfying the following conditional equation: | 03-26-2015 |