Patent application number | Description | Published |
20080198478 | Optical system and imaging system incorporating it - The invention relates to an optical system that is capable of providing a zoom lens having improved image-formation capability with a reduced number of lenses, and fabricating a slim yet high-performance digital or video camera. The optical system comprises a cemented lens having a cementing surface on its optical axis. Air contact surfaces on the light ray entrance and exit sides of the cemented lens G | 08-21-2008 |
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 |
20120113312 | Zoom Lens and Image Pickup Apparatus Equipped with Same - A zoom lens comprises, in order from its object side, a first lens unit having a negative refractive power and a second lens unit having a positive refractive power. The first lens unit comprises a first lens having a negative refractive power and a second lens having a positive refractive power. The zoom lens satisfies the following conditional expressions (1), (2), and (3): | 05-10-2012 |
20120250161 | Zoom Lens and Image Pickup Apparatus Using the Same - A zoom lens comprises in order from an object 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 negative refractive power. The second lens unit comprises in order from the object side, a positive lens, a negative lens, and a positive lens. At the time of zooming from a wide angle end to a telephoto end, the first lens unit moves toward the object side, and the fourth lens unit moves, and a distance between the first lens unit and the second lens unit decreases monotonically, a distance between the second lens unit and the third lens unit increases monotonically, and a distance between the third lens unit and the fourth lens unit increases monotonically. | 10-04-2012 |
20120300096 | Zoom Lens and Image Pickup Apparatus Using the Same - A zoom lens comprises in order from an object side, a first lens unit, a second lens unit, a third lens unit, a fourth lens unit, and a fifth lens unit having, respectively, a positive, negative, positive, negative, and positive refractive power. At the time of zooming from a wide angle end to a telephoto end, the first, third, and fourth lens units move toward the object side. A distance between the first and second lens units increase, a distance between the second and third lens units decrease, a distance between the third lens unit and the fourth lens unit changes, and a distance between the fourth lens unit and the fifth lens unit increases. The zoom lens satisfies the following expressions: | 11-29-2012 |
20120327276 | Image Pickup Apparatus Equipped with Zoom Lens with Bent Optical Path - A zoom lens with a bent optical path includes, in order from the object side to the image side, a first lens unit including the reflecting member and 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. During zooming from the wide angle end to the telephoto end, the second lens unit moves closer to the first lens unit only toward the object side, the third lens unit moves in such a way that it becomes closest to the second lens unit at an intermediate focal length position in the course of zooming as compared to the state at the wide angle end and the state at the telephoto end, and the fourth lens unit moves. The zoom lens satisfies a certain condition. | 12-27-2012 |
20130169846 | Zoom Lens and Image Pickup Apparatus Using the Same - A zoom lens comprises in order from an object side, a first lens unit having a positive refractive power, and at the time of zooming from a wide angle end to a telephoto end, the first lens unit moves, and the zoom lens satisfies the following conditional expression (1). | 07-04-2013 |
20130235468 | Zoom Lens and Image Pickup Apparatus Using the Same - A zoom lens comprises in order from an object side a first lens unit having a positive refractive power. The first lens unit consist one positive lens. The zoom lens satisfies the following conditional expressions (1) and (2). | 09-12-2013 |
20130258498 | Zoom Lens and Image Pickup Apparatus Using the Same - A zoom lens comprises in order from an object side,
| 10-03-2013 |
20130286277 | Zoom Lens and Image Pickup Apparatus Using the Same - A zoom lens includes in order from an object side, 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, and at the time of zooming, the first lens unit moves, and the zoom lens satisfies the following conditional expressions (1-1a), (1-2a), and (1-3a). | 10-31-2013 |