Matches 1 - 50 out of 72 1 2 >
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7407334 Lens for photographing system and camera assembly utilizing the lens  
In a lens group which is disposed forward of a photographing device and which includes at least a ceramic lens that is combined with a glass lens, wherein a conjugate surface of the photographing...
7312935 Optical system and optical apparatus having the same  
At least one exemplary embodiment is directed to an optical system which includes a plurality of refractive optical elements arranged substantially symmetrically with respect to an aperture-stop....
7298561 Optical device  
A front group is formed of a negative first lens as a meniscus lens which is convex at the object side and a negative second lens, and a rear group is formed of a biconvex positive third lens, an...
7154677 Projection objective for microlithography  
The invention relates to a projection lens comprising a lens assembly that has at least one first narrowing of the group of light beams. A lens with a non-spherical surface is located in front of...
7110192 System and method for a composite lens for a flow cytometer  
A lens system for collecting and focusing light emanating from an object has a cuvette housing the object and having a wall of thickness not greater than 1.5 millimeters; a plano-convex lens having...
6865032 Real image type finder optical system, and imaging system comprising the same  
A real image type finder optical system includes an objective lens group having positive refracting power and an eyepiece lens group having a positive refracting power. The objective lens group...
6801364 Projection objective for microlithography  
The invention relates to a projection lens comprising a lens assembly that has at least one first narrowing of the group of light beams. A lens with a non-spherical surface is located in front of...
6788387 Lithographic objective having a first lens group including only lenses having a positive refractive power  
A projection objective includes a first lens group (G 1 ) of positive refractive power, a second lens group (G 2 ) of negative refractive power and at least one further lens group of positive...
6522484 Projection objective  
A projection objective, particularly for microlithography at 248 nm or 193 nm has, after two bulges and two waists, a pronounced lens arrangement that preferably contains a further waist and the...
6519097 Gaussian lens for photography  
A Gaussian lens for photography includes, in order from the object side, a front lens group, a stop, and a rear lens group. The front lens group is formed of, in order from the object side, a first...
6445512 Projection television lens systems having improved modulation transfer functions  
Six-component projection lens systems ( 13 ) for use in CRT projection televisions ( 10 ) are provided. To provide an improved overall modulation transfer function across the field of view of the...
6437926 Image capture lens and image capture apparatus  
An image capture lens and an image capture apparatus in which various kinds of aberrations are corrected and optical performance suitable for capturing images is obtained. Successively from an...
6366412 Lens system for reading images and image reader  
A lens system for reading images, consisting of six lens elements of positive, positive, negative, negative, positive and positive refractive power, respectively, in order from the object side,...
6353509 Wide-angle lens  
A wide-angle lens is disclosed having only three lens groups of negative, positive, and positive refractive power, in order from the object side, and having only six lens elements with refractive...
6181488 Photographic lens  
A photographic lens comprising: a front lens group and a rear lens group that are arranged in order from the object side; wherein the front lens group comprises, in order from the object side, a...
6115194 Projection lens  
By satisfying certain specified conditions, a projection lens having six lens groups and a low F-number of 1.4 is disclosed wherein a maximum angle between a principal ray and the optical axis on...
6028720 High resolution objective for large-format photography  
A high-resolution objective for large-format photography has a pair of positive meniscuses flanking a stop area forming a lens aperture; and a respective negative cemented doublet on a side of each...
5903400 Projection-optical system for use in a projection-exposure apparatus  
Projection-optical systems are disclosed for projecting an image of a first object M onto a second object P. Each such projection-optical system comprises, in order from the first-object side: a...
5808804 Projection television lens system  
Six-component projection lens systems for use in projection televisions are provided. From the screen side, the systems preferably have a + - +++ - configuration. The use of a second lens element...
5796529 Fast photographic lens system  
A fast photographic lens system comprises a first lens having a positive refractive power, a convex-shaped outer face and a flat inner face; a second lens having a positive refractive power, a...
5760974 Lens system for maximizing light collection efficiency and transmission  
An optical lens system includes a multi-element lens designed to maximize light collection efficiency and transmission but accepting a sufficiently high level of distortion to forego the system...
5708532 Double-sided telecentric measurement objective  
A double sided telecentic measurement objective for contactless length measurement in two-dimensional and three-dimensional space. The objective has an image-side optical system consisting of three...
5548447 Photographic lens system  
A photographic lens system comprises, in order from the object end, a positive power element having a concave image end surface, an element having a concave image end surface, a negative power...
5539580 Projection optical system for a liquid crystal projector  
A projection optical system for a liquid crystal projector having a plurality of lenses and projecting an image from liquid crystal display devices onto a screen including a front lens portion...
5513042 Lens system with master lens system and conversion lens  
A lens system includes a master lens system and a conversion lens system. The master lens system has a first lens, a second lens, a third lens, and a fourth lens, which are sequentially arranged...
5500767 Objective lens and method of measuring its performance  
An objective lens is corrected for spherical aberration at both an operating wavelength and a measurement wavelength, such that the amount of spherical aberration to develop at the operating...
5311364 Reading lens for scanner  
A reading lens for a scanner to read an original in a reduced magnification, the lens comprising six lenses, i.e., from a first lens to a sixth lens in order on an optical axis. The first lens is a...
5299065 Objective with large aperture ratio  
An objective lens comprising, respectively from the object: a first element of a positive lens, at the object end thereof, having a convex surface; a second element of a positive meniscus lens, at...
5293270 Reading lens system  
An improved Gauss-type reading lens system having high lens performance in which there is only a small difference in performance in the meridional and sagittal directions and which can efficiently...
5191473 Objectives  
An objective of some 10 magnifications usable with microscopes, etc. which has an increased numerical aperture and working distance, including a first lens component that is a cemented lens...
5134523 Zoom beam expander  
An achromatic zoom beam expander of the Galilean type. The disclosed zoom beam expander has three components, each having a doublet that is individually color corrected such that the zoom beam...
5042929 Projection lens and projection system  
A projection lens enlarges and projects optical images in a matrix type light valve onto a screen. The projection lens includes a front lens group of the retrofocusing type; a rear lens with...
5039212 Zoom lens for variable magnification copying machine  
A zoom lens for a variable magnification copying machine has a first lens composed of a concave lens; a second lens composed of a convex lens; a third lens composed of a meniscus concave lens and...
4989961 Projection lens systems for use in projection television  
A projection lens system including seven lens elements for use in a projection television which comprises, in order from the screen side, a first lens unit composed of a positive lens element, a...
4812027 Gauss type near focus lens  
A Gauss type rear focus lens includes a forward group having, in succession from the object side, a first lens component having its convex surface facing the object side and having a positive...
4776681 Projection lens  
A projection lens for a cathode ray tube consisting from the image end of a first lens unit including an element of overall meniscus shape and of positive power at the optical axis, a second lens...
4765727 Color-corrected lens systems  
A method is described for selecting optical materials to use in designing color-corrected optical systems. Various dioptric, catadioptric and anamorphic optical systems are described, which use...
4747675 Ultra wide-angle eyepiece  
Ultra wide-angle eyepieces with relatively long focal lengths and minimal spherical aberration of the exit pupil and field curvature. The eyepieces use six elements in a positive power lens group...
4705364 Wide angle lens  
A wide angle lens having a long back focus substantially equal to the rear focal length of the total lens system comprising six lens components with a stop between the third and fourth components...
4682862 Projection lens  
A projection lens system adapted to project an image from a cathode ray tube and consisting from the image end of a first lens unit of weak optical power, a second lens unit of strong optical power...
4553823 Large relative aperture objective lens  
A large relative aperture objective lens having three lens groups of positive power with said three lens groups being all moved forward to effect focusing from an infinitely distant object to close...
4542954 Wide angle lens for the infrared dedicatory clause  
This rotationally symmetric optical sensor consists of six lens elements e selectively of the alkali halide materials KBr, C I, and KI. It has a wide field-of-view coverage of 60 degrees and...
4537472 Objective lens system for microscopes  
An objective lens system for microscopes designed for a magnification level of 60X and NA of 1.4, excellent in contrast and resolution, and comprising a first cemented doublet component comprising...
4494829 Curved field photographic objective  
The invention provides a highly corrected optical system comprising six groups consisting of ten elements, the indicies of refraction of which range from 1.654 to 1.807, the image surface being...
4426136 Projection lens with long working distance  
A projection lens with a long working distance for projecting a magnified image of an object comprises, in the order from the image side, a diverging first lens group containing a positive lens...
4364644 Gauss type large aperture photographic objective  
In the device disclosed, eight elements form a Gauss type wide or large aperture objective. The first element counting from the front is a positive meniscus lens of forward convexity, the second is...
4266252 Lens system for document scanning  
A lens system for scanning a document positioned on a flat support. The lens system operates in cooperation with apparatus which scans a beam of illuminating light across the document and a...
4256373 Fish eye lens system  
An improved high speed fish eye lens system is provided capable of compensating for lateral chromatic aberration, field curvature and astigmatism while providing an aperture ratio of F/2.8. The...
4206974 High resolution objective lens system  
A high resolution objective lens system for ultra microfiche designed for a magnification of 1/150x.about.1/120x and comprising a first cemented lens component consisting of a positive lens element...
4073575 Objective for video disks  
An objective for video disks comprising six lens components of single lenses for which the numerical aperture on the recording surface side is large, working distance is large and aberrations...
Matches 1 - 50 out of 72 1 2 >