| Patent application number | Description | Published |
|---|
| 20090002841 | ZOOM LENS SYSTEM, OPTICAL APPARATUS, AND METHOD FOR ZOOMING - Providing a zoom lens system having excellent optical performance, an optical apparatus, and a method for zooming the zoom lens system. The zoom lens system includes, in order from an object, a first lens group G | 01-01-2009 |
| 20090002844 | ZOOM LENS SYSTEM, OPTICAL APPARATUS, AND METHOD FOR ZOOMING - Providing a zoom lens system having excellent optical performance, an optical apparatus, and a method for zooming the zoom lens system. The zoom lens system includes, in order from an object, a first lens group G | 01-01-2009 |
| 20090081071 | RARE EARTH PERMANENT MAGNET ALLOY AND PRODUCING METHOD THEREOF - A rare earth permanent magnet alloy with a high coercive force is disclosed. The rare earth permanent magnet alloy comprises: a rare earth-iron-boron type magnetic phase (R | 03-26-2009 |
| 20090153980 | MACRO LENS, OPTICAL APPARATUS, AND METHOD FOR MANUFACTURING THE MACRO LENS - Providing a compact macro lens having high optical performance over the entire focusing range from infinity to a close distance, an optical apparatus equipped therewith, a method for focusing the macro lens, and a method for vibration reduction of the macro lens. The macro lens includes, in order from an object, a first lens group G | 06-18-2009 |
| 20090161227 | ZOOM OPTICAL SYSTEM, OPTICAL INSTRUMENT INCORPORATING THE ZOOM OPTICAL SYSTEM, AND METHOD OF MANUFACTURING THE ZOOM OPTICAL SYSTEM - A zoom optical system has a first lens group having a positive refracting power; a second lens group having a negative refracting power; a third lens group having a positive refracting power; a fourth lens group having a negative refracting power; and a fifth lens group having a positive refracting power, in the order from the object side. The fourth lens group is composed of a cemented lens of a negative lens and a positive lens in the order from the object side, and a condition of the following expression is satisfied: vp> | 06-25-2009 |
| 20100220400 | ZOOM LENS, OPTICAL APPARATUS EQUIPPED THEREWITH AND METHOD FOR MANUFACTURING THE ZOOM LENS - A zoom lens ZL installed in a single-lens reflex digital camera | 09-02-2010 |
| 20100259834 | Wide-angle zoom lens - The present invention is directed to wide-angle zoom lenses dedicated to single-lens reflex digital cameras, which attains zoom ratio greater than 2. Such a wide-angle zoom lens has four groups of lens pieces, namely comprising the leading or foremost 1st lens group of negative refractivity closest to an objective field, the succeeding 2nd lens group of positive refractivity, the third lens group of negative refractivity, and the trailing 4th lens group of positive refractivity arranged in this order to move each lens group to vary optical power; and the 1st lens group includes a front subset of the lens pieces of negative refractive power and a rear subset of negative refractive power. The front-end lens piece in the 1st lens group is shaped in negative meniscus lens that has its concave surface faced toward an imaging plane and has the opposite surfaces shaped aspherical. The front and rear subsets of the 1st lens group meet requirements of a focal length as expressed in the following formula: | 10-14-2010 |
| 20110194191 | ZOOM LENS SYSTEM, IMAGING APPARATUS, AND METHOD FOR ZOOMING THE ZOOM LENS SYSTEM - Providing a zoom lens system having excellent optical performance with a high zoom ratio, an imaging apparatus, and a method for zooming the zoom lens system. The system including, in order from an object, a first group G | 08-11-2011 |
