Matches 1 - 50 out of 134 1 2 3 >
Match Document Document Title
7466495 Image pickup apparatus and zoom lens  
An image pickup apparatus includes a zoom lens including at least two movable lens groups; an image pickup element that converts an optical image formed with the zoom lens into an electric signal;...
7453642 Zoom lens system and image pickup apparatus having the same  
Disclosed is a compact zoom lens system having a image stabilizing function. This zoom lens system is provided with a plurality of lens units of which the interval between adjacent ones is changed...
7420611 Electronic image pickup system  
The invention makes a suitable selection from zoom modes and lens elements so thin that the thickness of each lens group can reduced, thereby slimming down a zoom lens with great thoroughness and,...
7414665 Imaging system  
The invention relates to an imaging system in which, while high image quality is maintained with the influence of diffraction minimized, the quantity of light is controlled, and which enables the...
7370977 Optical projection system and image display device having the same  
An optical projection system which creates pincushion distortion of an image and then creates a barrel distortion of the pincushion-distorted image to compensate for the pincushion distortion and...
7317582 Zoom lens, video enlarging/projecting system, video projector, rear projector, and multivision system  
The present invention includes three or more lens groups. These are arranged in the order of a first lens group ( 11 ) that has positive refractive power and a second lens group ( 12 ) that has...
7190520 Zoom lens system and imaging apparatus having the same  
A zoom lens system includes a front lens group and a rear lens group arranged from an object side to an image side in that order. The front lens group includes a plurality of lens units, and during...
7136226 Front teleconverter lens system  
A front teleconverter lens system having superb optical performance with less production of aberration in spite of its compactness. The front teleconverter lens system includes, in order from an...
7116490 Zoom lens  
A zoom lens having a high zoom ratio and also a small size is proposed. The zoom lens has a front group of lenses and a rear group of lenses. The front group of lenses has a first lens, a second...
7046455 Variable magnification lens and imaging apparatus using the same  
A variable magnification lens includes, in order from the object side, a front lens unit with positive refracting power and a rear lens unit with negative refracting power so that spacing between...
7016114 Diffraction optical device and optical system including same  
A diffraction optical device includes a first diffraction element and a second diffraction element arranged adjacent to each other. One of the first diffraction element and the second diffraction...
6934094 Imaging lens device  
An imaging lens device has an imaging lens system that forms an optical image and an image sensing device that converts the optical image formed by the imaging lens system into an electronic...
6906869 Zoom optical system and camera comprising the same  
The invention relates to a compact two-group zoom optical system which has an angle of view of 70° or greater at the wide-angle end and satisfactory image-formation capability all over the zoom...
6844987 Zoom lens system for covering superwide-angle area  
A zoom lens includes first to fourth lenses in order from an object side. The first lens has negative refracting power and a concave surface thereof faces the object side. The second and fourth...
6836376 Imaging lens system  
An imaging lens system includes, in the named order from the side of an object toward an image surface, a light amount diaphragm, a first lens having a positive power with a main power on the side...
6825990 Zoom lens and image pickup apparatus  
A small-sized and light weight zoom lens achieving high optical performance, a wide angle of view, and a high magnification, is disclosed. The zoom lens comprises, in order form the object side, a...
6763186 Zoom lens, and camera incorporating such zoom lens  
Disclosed is a zoom lens system which uses a diffractive optical element such that high optical performance can be obtained over the overall power variation range. The zoom lens system includes a...
6717741 Zoom lens  
The invention relates to a two-group zoom lens of +− construction, which, albeit having a high zoom ratio, is reduced in length not only at the wide-angle end but also at the telephoto end and...
6707618 Variable magnification lens and camera having the same  
A variable magnification lens performs a magnification change by changing a distance between a first lens unit G 1 having a positive refracting power and a second lens unit G 2 having a negative...
6608970 Zoom optical system and camera using the same  
A zoom optical system consists of, in order from the object side, a first lens unit (G 1 ) with a positive refracting power and a second lens unit (G 2 ) with a negative refracting power. In...
6597514 Wide-angle zoom lens  
A wide-angle zoom lens includes a front lens unit with positive refracting power and a rear lens unit with negative refracting power so that spacing between the front lens unit and the rear lens...
6563644 Front tele-converter, and front tele-converter having vibration-reduction function  
To provide a front tele-converter that may cause less aberrations and has a superior imaging quality though it has a high magnification, disclosed is a front tele-converter TC having an afocal...
6556357 Zoom lens  
A zoom lens which includes, in order from an object side, a first lens unit of positive refractive power, a second lens unit of positive refractive power and a third lens unit of negative...
6552857 Soft-focus lens system  
A soft-focus lens system includes a master lens group and a soft-focus lens group. The soft-focus lens group includes a positive sub lens group and a negative sub lens group. The positive sub lens...
6525886 Two group zoom lens having weak front element  
A zoom lens is provided. The zoom lens includes a positive power first lens group having a first lens element and a second lens element, and a negative power second lens group having a third lens...
6510009 Wide-angle zoom lens and photographing apparatus using the same  
A wide-angle zoom lens includes a first lens unit with a positive refracting power and a second lens unit with a negative refracting power so that a space between these lens units is changed and...
6493142 Zoom lens and photographing apparatus having it  
A zoom lens includes the following lens units in the order named from the object side a first lens unit of a positive optical power, which has a first lens subunit, a second lens subunit, and a...
6459536 Zoom lens system, and image pickup system using the same  
The invention provides a compact, low-cost zoom lens system comprising a positive lens group and a negative lens group. The system comprises a first lens group G1 having positive refracting power...
6459535 Zoom lens system and image pickup apparatus using same  
A compact zoom lens system having a high vari-focal ratio comprising at least two lens units in which the lens units are moved in loci different from each other to change a magnification and a...
6411443 Zoom optical system  
An optical system composed, in order from the object side, of a first lens unit which has a positive power or is powerless, a second lens unit which has a positive power, a third lens unit which...
6404562 Zoom lens  
A zoom lens to form an image of an object with variable magnification, is provided with a first lens group having a positive refracting power, and a second lens group positioned closer to the image...
6333824 Zoom lens system consisting of two lens units  
A zoom lens system for compact cameras comprising, in order from the object side, a first negative lens unit and a second positive lens unit, and configured to be zoomed from a wide position to a...
6295168 Refractive optical system that converts a laser beam to a collimated flat-top beam  
An optical system having a first positive optical element having an aspherical surface; and a second positive optical element having an aspherical surface. The first and second optical elements are...
6243212 Telecentric zoom lens  
A telecentric zoom lens having telecentric forming aperture optically and preferably mechanically intermediate an objective lens and a zoom group. The aperture is fixed along an optical axis and...
6236517 Zoom lens  
A zoom lens includes from an object side to an image side, at a wide-angle end, a first lens group whose overall refractive power is positive and a second lens group whose overall refractive power...
6219190 Zoom lens  
A zoom lens is composed of a plurality of lens units. The plurality of lens units includes a movable lens unit having a negative refractive power lying closest to an image side. The movable lens...
6195210 Image pickup lens system and camera equipped with the same  
An image pickup lens system which comprises a first positive lens unit and a second negative lens unit in order from the object side, and is configured to change a magnification by varying an...
6185050 Zoom lens having two lens groups  
A zoom lens includes: a first lens group having positive refracting power; and a second lens group provided on an image side of the first lens group, having negative refracting power. The zoom lens...
6181484 Compact two-group wide-angle zoom lens  
In a compact wide-angle zoom lens having a two-group configuration composed of positive and negative lens groups, the first lens group is composed of G1A and G1B groups, while a stop is disposed...
6154323 Zoom lens system using a diffractive optical element  
The invention relates to a high-performance, high-zoom, low-cost zoom lens system which is easy to fabricate due to a reduced number of lenses. The zoom lens system comprises a first lens group G1...
6147813 Zoom lens  
A zoom lens consisting of a front lens group having a positive power and a rear lens group having a negative power. The front lens group is composed of a first lens having negative power and a...
6124987 Zoom Lens  
A zoom lens includes a front lens group having a negative power as a whole and a rear lens group having a positive power as a whole, and a stop included therein. For zooming, the front and rear...
6101045 Zoom lens system  
A zoom lens system has from an object side a first lens group of a positive refractive power, a second lens group of a positive refractive power and a third lens group of a negative refractive...
6069744 Microscopic objective having a long working distance  
The invention provides a microscope objective having a working distance longer than achieved so far in the prior art even at more than 100 magnifications. The objective comprises a lens group A...
6011658 Compact zoom lens system  
A compact zoom lens system is described which includes, when viewed from an object, a first lens group with a positive refractive power; a second lens group with a negative refractive power;...
5999332 Compact wide-angle lens  
A compact wide-angle lens having a front lens group of positive refractive power and a rear lens group of negative refractive power. The front lens group is composed of three lens elements having...
5995299 Compact zoom lens system  
A compact zoom lens system includes, when viewed from an object side, a first lens group with positive refractive power and a second lens group. The magnification of the system can be changed by...
5991095 Compact two-group zoom lens  
A compact two-group zoom lens, wherein zooming is accomplished by changing the distance between the two lens groups. In order from the object side, the first lens group G1 is of positive refracting...
5991094 Zoom lens system for a lens shutter camera  
A zoom lens system is composed of two lens units. The first lens unit is arranged at an object-side end and the second lens unit is arranged at an image-side end. The first lens unit has one lens...
5986821 Two lens group zoom lens system with a high zooming ratio  
A zoom lens system having two lens group. The zoom lens system has a zooming ratio greater than 2.4, a viewing angle of over 70 degrees and a telephoto ratio of about 1.0. The zoom lens system...
Matches 1 - 50 out of 134 1 2 3 >