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7450314 Zoom lens system and image pickup apparatus using the same  
A zoom lens system comprises, 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...
7443610 Lens system  
A lens system comprises a first lens positive in power, a second lens positive in power, a third lens negative in power, a fourth lens positive in power, and a fifth lens negative in power. The...
7440196 Image forming optical system and image pickup apparatus using the same  
An image forming optical system comprising: a first positive lens unit disposed closest to the object side in the image forming optical system; an aperture stop; and a second positive lens unit...
7317580 Zoom lens  
In this invention, to provide a compact zoom lens having a small number of optical element groups to be driven and a simple moving mechanism, at least one of a plurality of optical element groups...
7289273 Zoom lens and electronic imaging apparatus having the same  
A zoom lens includes, in order from the object side, the first lens unit consisting of one negative lens component in which a plurality of lens components are cemented to one another and the second...
7280286 Zoom lens system  
Providing a zoom lens system that can excellently correct aberrations over entire range from a wide-angle end state W to a telephoto end state T in spite of having a high zoom ratio including, in...
7277629 Zoom lens, camera apparatus and portable information terminal apparatus  
A zoom lens having five lens groups arranged in succession. The zoom lens is configured such that when zooming from a short focal length end toward a long focal length end, the second lens group...
7262925 Image lens array  
An image lens array, from object side, comprises: a first positive meniscus plastic lens with a convex surface facing forward, a second negative meniscus plastic lens with a concave surface facing...
7256946 Zoom lens having a wide angle of view and a high zooming ratio and a camera employing the same  
A zoom lens with a wide angle of view and a high zooming ratio and a camera employing the zoom lens. The zoom lens includes a first lens group having a positive refractive power, a second lens...
7227698 Optical unit, and image taking apparatus provided therewith  
A plurality of lens units in an optical unit has at least: from the object side toward the image side, a first lens unit having a positive optical power, a second lens unit having a negative...
7215486 Zoom lens and electronic imaging device having the same  
A zoom lens includes a most object-side lens unit remaining fixed on the optical axis when the magnification of the zoom lens is changed and a focusing operation is performed; a most image-side...
7215477 Zoom lens and image display apparatus including the zoom lens  
Provided is a projection lens, including: a plurality of moving lens units that move on an optical axis for zooming; and a plurality of plastic lenses containing plastic, in which when a focal...
7190528 Zoom lens and image projection apparatus having the same  
A zoom lens comprises a plurality of lens units including a first lens unit disposed most adjacent to an enlargement side and having negative refractive power, wherein one or more lens units of the...
7187504 Zoom lens and image pick up apparatus including the same  
A zoom lens includes, in order from an object side to an image side: a first lens unit having positive optical power; a second lens unit having negative optical power; a third lens unit having...
7173768 Zoom lens and image pickup apparatus  
A zoom lens has first to fifth lens groups G 1 to G 5 having positive, negative, positive, positive, and negative refractive power, in order from an object side. The first lens groups G 1 ...
7116489 Zoom lens and imaging device  
Disclosed are a zoom lens and an imaging device. The zoom lens has a first lens group with positive refractive power, a second lens group with negative refractive power, a third lens group with...
7110188 Small imaging lens and imaging apparatus  
An imaging lens includes sequentially, from an object side, a first lens group, a second lens group, a third lens group, and a fourth lens group. The first lens group includes only a first lens...
7092169 Zoom lens system  
A zoom lens system, in sequence from an object side to an image side, includes a first lens group having positive refractive power and fixed for gathering incoming light; a second lens group having...
7085070 Zoom lens and electronic imaging device having the same  
A zoom lens includes a most object-side lens unit remaining fixed on the optical axis when the magnification of the zoom lens is changed and a focusing operation is performed; a most image-side...
7079324 Zoom lens and image projection apparatus including the same  
A zoom lens includes a plurality of lens groups including a first lens group arranged on the foremost side and having negative optical power. Zooming is performed by moving at least one of the...
7068441 Zoom lens optical system  
A zoom lens optical system includes a first optical group with a first lens having negative refraction, a second lens having positive refraction, and a light path changing unit to change the path...
6885506 Wide-angle zoom lens system  
A wide-angle zoom lens system includes a negative first lens group, a positive second lens group, a positive third lens group, a negative fourth lens group, and a positive fifth lens group. Upon...
6718132 Zoom lens, camera apparatus and portable information terminal apparatus  
A zoom lens having five lens groups arranged in succession. The zoom lens is configured such that when zooming from a short focal length end toward a long focal length end, the second lens group...
6542308 Projection display apparatus and projection lens device for use therein  
A projection display apparatus having a light source for generating a white light, a liquid crystal panel for modulating an incident light from the light source, a polarizing plate which is located...
6529336 Color corrected projection lenses employing diffractive optical surfaces  
A projection television system ( 10 ) is provided which has a CRT ( 16 ) and a projection lens system ( 13 ) for forming an image on a screen ( 14 ). The projection lens system ( 13 ) is...
6515803 Zoom lens system  
A zoom lens system having multiple lens units including, sequentially in a direction from an enlargement side thereof toward a reduction side thereof, a first lens unit having a negative optical...
6449433 Taking lens device  
A taking lens device has a zoom lens system having an optical system that is comprised of a plurality of lens units and that achieves zooming by varying the unit-to-unit distances and an image...
6445513 Single-focus lens  
Provided is a single-focus lens in which cost reduction and a simple configuration with a shorter overall length are realized as well as preferable optical performance is achieved. In the...
6356398 Lens having diaphragm structure at outer edge portion on incident side thereof and optical unit using same  
A diaphragm structure is provided at an outer edge portion on an incident side of a lens which converges a collimated incident light and outputs the converged light, the diaphragm structure being...
6342974 Zoom lens and photographing apparatus  
A zoom lens includes, in order from an object side to an image side, a first lens unit of positive refractive power, a second lens unit of negative refractive power arranged to move during...
6339509 Variable focal length optical system  
A variable focal length optical system of reducing size and increased zoom ratio is provided. According to one aspect. at least three lens groups, in order from an object side, a first lens group...
6301057 Long focal length projection lenses  
A projection lens for use with LCD or DMD panels is provided. The lens has three lens units, the first unit having a weak power and at least one aspheric surface, the second unit having a positive...
6297914 Zoom lens system  
A two-lens-group zoom lens system includes a positive first lens group and a negative second lens group in this order from the object, and zooming is performed by varying the distance between the...
6278559 Zoom lens for television camera  
A zoom lens having only five lens groups of positive, negative, negative, positive and positive refractive power, respectively, in order from the object side. The focal distance is varied by...
6271973 Variable focal length lens system  
A variable magnification optical system of reduced size and increased zoom ratio is provided. According to one aspect, a first lens group having a positive refractive power, a second lens group...
6236515 Zoom lens system  
A zoom lens system has the first and second lens units. During zooming from a wide-angle end to a telephoto end, the lens units are moved to decrease a distance therebetween. The first lens unit...
6222685 Imaging lens  
An imaging lens comprises a front group constituted by a first lens L 1 made of a negative meniscus lens having a convex surface directed onto the object side, the object-side surface thereof...
6188528 Optical lens, and optical pickup and optical disc apparatus using such lens  
An optical lens composed of a transparent material, wherein one surface thereof on a light source side is a convex aspherical surface of rotation symmetry defined by a function relative to the...
6144499 Projection lens  
The present invention relates to a projection lens including: a power lens unit; one or more image-side lens units, provided on the image side with respect to the power lens, for correcting an...
6130786 Projection lens and image display device  
An image display device which is compact on the whole and low in cost, and which uses a plurality of projection lens systems each of which is constituted by five lens groups including a first...
6081387 Projection lens  
A projection lens comprises 5 lenses in 5 groups including: a first-group lens that is a positive lens; a second-group lens that is a positive lens having the largest positive power (the inverse...
6031669 Zoom lens  
A high-performance zoom lens is disclosed having at least four axially movable lens groups for zooming from a wide-angle end to a telephoto end. The zoom lens constitutes a number of lens elements...
6023375 Projection lenses for use with large pixelized panels  
A projection lens for use with LCD panels is provided. The lens has a first lens unit which has a positive power and a second lens unit which has a negative power. The first lens unit contains at...
6011655 Eyepiece  
An eyepiece including a positive first lens element, a negative second lens element, a positive third lens element and a positive fourth lens element is provided. The first, second, third, and...
6002527 Compact high-zoom-ratio zoom lens  
A compact, high-zoom-ratio, high-performance five-group zoom lens having a positive-negative-negative-positive-positive refractive power arrangement. The zoom lens has the ability to focus at close...
5982560 Compact zoom lens system  
A compact zoom lens system includes a positive first lens group and a negative second lens group. The first lens group includes a first positive lens, a second negative biconcave lens and a third...
5933284 Zoom lens  
A zoom lens, comprises a first lens group, provided in an object side, having a positive refracting power; and a second lens group, provided in an image side from the first lens group, having a...
5933280 Projection lens and image display device  
An image display device which is compact on the whole and low in cost, and which uses a plurality of projection lens systems each of which is constituted by five lens groups including a first...
5898525 Zoom lens with long back focus  
A high-performance zoom lens having a long back focus and thus ideally suited to electronic imaging equipment. The zoom lens comprises a first lens group G1 having positive refractive power, a...
5870234 Compact wide-angle lens  
This invention relates to a compact wide-angle lens which consists of five members. The first member and the last member are each divergent lenses of low deviation, which consist of low...
Matches 1 - 50 out of 118 1 2 3 >