Patent application number | Description | Published |
20090086039 | Compound lens and camera comprising the same - A compound lens on which a plastic lens is formed on a glass lens, having:
| 04-02-2009 |
20090195888 | Image Forming Optical System and Electronic Image Pickup Apparatus Using Image Forming Optical System - An image forming optical system according to the present invention is characterized in that, in an image forming optical system having a positive lens group, a negative lens group, and an aperture stop, the positive lens group is disposed at an object side of the aperture stop,
| 08-06-2009 |
20090279183 | Image Forming Optical System and Electronic Image Pickup Apparatus Using Image Forming Optical System - An image forming optical system according to the present invention is characterized in that, in an image forming optical system having a positive lens group, a negative lens group, and an aperture stop, the positive lens group is disposed at an image-plane side of the aperture stop,
| 11-12-2009 |
20090279184 | Image Forming Optical System and Electronic Image Pickup Apparatus Using Image Forming Optical System - In an image forming optical system having a positive lens group, a negative lens group, and an aperture stop, the negative lens group is disposed at an image side of the of the aperture stop,
| 11-12-2009 |
20090279185 | Image Forming Optical System and Electronic Image Pickup Apparatus Using Image Forming Optical System - An image forming optical system according to the present invention is characterized in that, in an image forming optical system having a positive lens group, a negative lens group, and an aperture stop, the negative lens group is disposed at an object side of the aperture stop,
| 11-12-2009 |
20090284642 | Zoom lens and image pickup apparatus equipped with same - A zoom lens has a negative object side lens unit (or first lens unit G | 11-19-2009 |
20090284843 | Three unit zoom lens and image pickup apparatus equipped with same - A zoom lens includes, in order from the object side, a negative lens unit, a positive lens unit and a positive lens unit. During zooming from the object side, the second lens unit moves, 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 increases. The second lens unit has two lens components including, in order from the object side, a positive front lens component and a rear lens component. The third lens unit is composes of two lens components including, in order from the object side, a front lens component and a positive rear lens component. An aperture stop is disposed closer to the image side than the first lens unit and closer to the object side than the rear lens component in the second lens unit, and the aperture stop moves integrally with the second lens unit along the optical axis direction during zooming from the wide angle end to the telephoto end. | 11-19-2009 |
20110102639 | Image forming optical system and electronic image pickup apparatus equipped with same - A zoom optical system having a lens group I including two single lenses or one lens component, an aperture stop, and a lens group A disposed between the lens group I and the aperture stop, including a lens component made up of a positive lens LA and a negative lens LB that are cemented together, and having a negative refracting power as a whole. The distance between the lens group I and the lens group A on the optical axis changes for zooming, and the lens component has an aspheric cemented surface. When the shape of the aspheric surface is expressed by a certain equation, the shape of the air-contact surface of the positive lens LA and its aspheric components etc. satisfy conditional expressions (3a) and (3b). | 05-05-2011 |
20110267504 | Image forming optical system and electronic image pickup apparatus using the same - An image forming optical system comprising four or five lens groups in total, wherein during zooming from the wide angle end to the telephoto end, the distance between the first lens group and the second lens group increases, the distance between the second lens group and the third lens group decreases, and the distance between the third lens group and the fourth lens group changes, the first lens group comprises three lenses including a negative meniscus lens, a positive meniscus lens, and a positive lens, the second lens group includes a negative meniscus lens having a convex surface directed toward the object side and a concave surface directed toward the image side, the negative meniscus lens being located closest to the object side in the second lens group, the position of the second lens group at the telephoto end is closer to the object side than that at the wide angle end, the image forming optical system has an aperture stop that moves integrally with the third lens group, the third lens group includes a positive lens component and a negative lens component, and the fourth lens group comprises one lens. | 11-03-2011 |
20110310286 | Image forming optical system and electronic image pickup apparatus using the same - An image forming optical system of the present invention is characterized by comprising three groups having, in order from an object side to an image side, a first lens group having a negative refractive power, a second lens group having a positive refractive power, and a third lens group having a positive refractive power, or four groups with one more lens group added to the image side,
| 12-22-2011 |
20120057068 | Image forming optical system and electronic image pickup apparatus equipped with same - An optical system includes, in order from its object side a negative first lens unit, a positive second lens unit, a negative third lens unit, and a positive fourth lens unit. The air gaps between the lens units are variable during zooming. The first lens unit includes one positive lens, the second lens unit includes one negative lens, the third lens unit consists of one or two lens components, and the fourth lens unit consists of one lens component, where the term “lens component” refers to a single lens or a cemented lens. The system satisfies the condition “003-08-2012 | |
20130163094 | Objective Optical System and Observation Apparatus Provided with the Same - An objective optical system of an embodiment according to the present invention is formed in such a way that: the objective optical system includes an immovable lens group which is arranged nearest to the object side, which is immovable in focusing, and which has negative power, and first and second movable lens groups at least one of which moves along the optical axis in focusing; and an amount of variation in magnification per movement of the first movable lens group is different from an amount of variation in magnification per movement of the second movable lens group. | 06-27-2013 |
20140376102 | ZOOM LENS AND IMAGE PICKUP APPARATUS USING THE SAME - A zoom lens includes a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, third lens unit having a positive refractive power, a fourth lens unit having a negative refractive power, a fifth lens unit having a positive refractive power, and an aperture stop disposed between the second lens unit and the third lens unit. At the time of zooming, the aperture stop moves and the fifth lens unit is fixed. At the time of zooming from a wide angle end to a telephoto end, a distance between the first lens unit and the second lens unit widens, a distance between the second lens unit and the third lens unit narrows, a distance between the third lens unit and the fourth lens unit fluctuates, and a distance between the fourth lens unit and the fifth lens unit fluctuates. | 12-25-2014 |
20150103413 | Optical System and Optical Instrument, Image Pickup Apparatus, and Image Pickup System Using the Same - An optical system which forms an optical image on an image pickup element, comprising in order from an object side,
| 04-16-2015 |
20150146036 | Image Forming Lens System and Image Pickup Apparatus Using the Same - An image forming lens system includes a front lens unit having a positive refractive power, and a rear lens unit, and does not include any other lens unit. The front lens unit includes a first lens unit having a positive refractive power and a second lens unit having a negative refractive power. Each of the first lens unit and the second lens unit includes a positive lens and a negative lens. The second lens unit is a focusing lens unit. The rear lens unit includes a positive lens and a negative lens. The second lens unit is the only lens unit that moves, in the front lens unit, and the following conditional expressions (1) and (2′) are satisfied: | 05-28-2015 |
Patent application number | Description | Published |
20090316277 | Zoom lens and an imaging apparatus incorporating the same - The first lens group comprises a positive lens and a negative lens, and the total number of lenses in the first lens group is 2. The second lens group consists of, in order from the object side, a front unit of negative refracting power and a rear unit of positive refracting power. The third lens group consists of, in order from the object side, a front unit of positive refracting power and a rear unit of negative refracting power. The fourth lens group comprises a positive lens component, and the total number of lens components in the fourth lens group is 1. The front unit of the second lens group comprises a negative lens component, and the total number of lens components in the front unit of the second lens group is 1. The rear unit of the second lens group comprises, in order from the object side to the image side, a negative lens and a positive lens, and the total number of lenses in the rear unit of the second lens group is 2. The negative lens component in the front unit of the second lens group and the negative lens in the rear unit of the second lens group satisfy the following condition (1A): | 12-24-2009 |
20120075715 | Zoom lens and electronic imaging apparatus incorporating the same - The zoom lens of the invention comprises, in order from an object side thereof, 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 positive refracting power, a fifth lens group having negative refracting power, and a sixth lens group having positive refracting power. The first lens group includes a reflective optical element, and the lens in and on the most image side of the fourth lens group comprises a negative lens concave on its image side. | 03-29-2012 |
20120075716 | Zoom lens and electronic amaging apparatus incorporating the same - The zoom lens of the invention comprises, in order from an object side thereof, 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 positive refracting power, a fifth lens group having negative refracting power, and a sixth lens group having positive refracting power. The first lens group includes a reflective optical element, and the lens component in, and on the most image side of, the fourth lens group has negative refracting power. | 03-29-2012 |
Patent application number | Description | Published |
20090067061 | Zoom lens and imaging apparatus incorporating the same - The invention relates to a zoom lens and an imaging apparatus incorporating the same. More particularly, the invention is concerned with a zoom lens that is downsized for use with imaging apparatus inclusive of video cameras and digital cameras. The zoom lens comprises a positive first group G | 03-12-2009 |
20120307372 | ZOOM LENS, AND IMAGING APPARATUS INCORPORATING THE SAME - The zoom lens comprises, from an object side, a first lens group, a second lens group that includes an aperture stop moving integrally therewith, a third lens group, and a fourth lens group having, respectively, negative, positive, negative, and positive refracting power, and during zooming from a wide-angle end to a telephoto end, a spacing between the first and second lens groups becomes narrow, between the second and third lens groups changes, and between the third and fourth lens groups grows wide, and the first lens group includes a first lens having negative refracting power, a second lens having a reflective surface for bending a light ray coming out of an object and a third lens having positive refracting power, and in said second lens group, a most image-plane-side surface of a lens having negative refracting power is configured in a concave shape on an image plane side. | 12-06-2012 |