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Patent Searching and Data


Matches 801 - 850 out of 3,805

Document Document Title
JP2001091828A
To provide a lens for reading an image which is composed of six lenses, namely, positive, positive, negative, negative, positive and positive in this order from an object side, which is comparatively bright, whose angle is wide and whose...  
JP2001083411A
To make the length of back focus long and to restrain aberration with good balance while attaining a wider viewing angle and high resolution by constituting a wide-angle lens of three lens groups being negative, positive and positive and...  
JP2001083415A
To provide a glass-made objective lens for excellently reproducing a DVD and a CD. At least one surface of the glass-made single lens is concentrically divided into a 1st aspherical surface area 104 including an optical axis, a 2nd asphe...  
JP2001083409A
To provide an image pickup lens which is constituted so that desired optical performance can be maintained, a back focus distance can be sufficiently secured, a high telecentric property can be secured and respective aberrations can be e...  
JP2001075006A
To excellently correct each aberration and to easily manufacture an image pickup lens while maintaining a desired optical performance and securing a wide viewing angle. This lens is constituted by successively arraying a diaphragm 4, a f...  
JP3148221B2  
JP2001066523A
To provide an eyepiece lens used for an observation optical system such as binoculars, a telescope and a microscope capable of excellently compensating aberration to the peripheral part of its field, restraining distortion aberration wit...  
JP3142127B2  
JP3140841B2  
JP2001051191A
To provide an fθ lens for two-dimensionally scanning optical system for a printed board drilling work capable of realizing high fθ linearity over a wide two-dimensional scanning range, the telecentric characteristic, and the convergenc...  
JP2001051190A
To provide a large aperture lens in which a distortion aberration is not enlarged but other various aberrations are corrected excellently, by specifying a lens formation. This large aperture lens is composed of first and second lenses L1...  
JP3134880B2  
JP3133360B2  
JP3155360B2
PURPOSE: To provide the visual display device by which images can be observed at the angle of view wider than 40° and flat and sharp images can be observed even at the periphery. CONSTITUTION: This visual display device is composed of a...  
JP3130527B2  
JP3128125B2  
JP2001021798A
To provide a small-sized and light-weighted telephoto macro-lens system to allow life-size photographing, suitable for an AF camera, and having high optical performance.This system is composed, in order from an object side, of the first ...  
JP3123947B2  
JP2001004915A
To make total transmitted light quantity maximum and to obtain a bright and excellent observed image by including at least two or more surfaces having optical refractive power between an object image and a pupil position and satisfying a...  
JP3115879B2  
JP3117225B2  
JP2000338396A
To obtain a rear focus type middle-range telephoto lens whose F number is ≤2.8, the angle of view is about 26° by which the mechanism of a lens barrel can be simplified, which is adequate to auto-focusing, and whose performance is hig...  
JP2000321490A
To obtain a photographic lens which has a ≥60° photographic view angle without degrading the optical performance. This photographic lens 10 has six-group constitution of a 1st lens group 11 to a 6th lens group 16 having negative, posi...  
JP2000322757A
To sufficiently reduce the diameter of a light beam to be converged on each information recording layer by designing to minimize the spherical aberration of the light beam that converges on the information recording layer positioned near...  
JP2000321489A
To provide an image pickup lens capable of maintaining desired optical performance, properly setting the power of a 1st lens and the power of a 2nd lens while a large back focus distance is secured, and being easily manufactured. This im...  
JP2000321494A
To obtain a variable power optical system provided with vibration- proof function which obtains a still image by optically correcting the blur of a photographic image when the variable power optical system vibrates. This variable power o...  
JP3122970B2
PURPOSE: To embody a photographing lens good in aberration compensation and having wide photographing viewing angle with a low cost single lens by making at least one surface of a biconvex single lens aspherical shape and satisfying a sp...  
JP3103166B2  
JP2000292688A
To provide an image pickup device having a photographing lens having the short lens total length and maintaining optical performance of the whole image screen in a well-balanced state by adopting a triplet type, arranging a diaphragm in ...  
JP3121068B2
PURPOSE: To provide the photographic lens which has various aberrations excellently compensated and is used for such a microscope that its objective and ocular have curvature of field compensated independently of each other. CONSTITUTION...  
JP2000284172A
To obtain a color image read lens with high resolution which while correcting the on-axis chromatic aberration effective and sufficiently, can main tain the excellency of other various aberrations by making a lens of five-group constitut...  
JP2000275729A
To obtain a projection lens which is formed so that the outside diameter of a 2nd lens group is made small and interference with illumination luminous flux is extremely reduced while making an optical system compact, whose resolution is ...  
JP2000275510A
To make the telephoto/wide-angle power variation ratio large even in a shutter-diameter reduced state while making the lens compact and low-cost by making the focal lengths of lenses on a wide-angle side and a telephoto side meet specifi...  
JP2000275006A
To obtain a good wavefront aberration at a parallel wavefront to a point of an infinite object and a good image formation efficiency aberration to a finite object by specifying a shape of each of three lenses of a group and constituting ...  
JP2000266997A
To provide a photographing lens of two-group two sheet constitution excellent in production aptitude, having high brightness of an image plane, and having restrained fluctuation in various kinds of aberrations. This photographing lens 30...  
JP2000266996A
To enlarge the numeral aperture without increasing aberration and attain miniaturization by combining a specific refraction factor distribution lens with a single homogeneous plano-convex lens. A single refraction factor distribution len...  
JP2000258684A
To shorten the focal distance of an image pickup lens, also to secure the back focus distance thereof and to easily produce the lens. This lens is constituted of a 1st lens 1 consisting of a concave lens whose mark for the center radius ...  
JP2000258685A
To obtain an inner focus type photographing optical system where the fluctuation of aberration in the case of focusing is excellently compensated and which has excellent optical performance all over the object distance. This photographin...  
JP2000249912A
To lighten the load of a focusing action and to reduce the deterioration of resolution caused by the fluctuation of an original by making the curvature of the field small and making depth large as an image forming lens constituted of fiv...  
JP2000249914A
To obtain a lens for reading an image whose angle of view is wide, whose cost is low and by which the excellent quality of a read image is obtained and which is bright by constituting the lens of four lenses, making one surface of at lea...  
JP2000249916A
To lighten the load on a focusing action and to reduce the deterioration of resolution caused by the fluctuation of an original by making the curvature of the field small and making depth large as an image forming lens constituted of fou...  
JP3085787B2  
JP2000231056A
To provide a photographing lens capable of focusing to an object distance in a wide range from an infinity object to a short distance object. This photographing lens is provided with a 1st lens group L1 having positive refractive power, ...  
JP3079497B2  
JP3077811B2  
JP2000227547A
To provide a photographic lens of a 2 groups 2 lenses construction where illuminance of the image surface is bright and variation in various aberrations can be kept down without narrowing the angle of the photographic image. In this phot...  
JP2000227546A
To obtain an inner focus type middle telephotographic lens where aberration is completely compensated and which is constituted of small number of lenses by constituting the lens of a 1st positive lens group, a 2nd negative lens group and...  
JP3076098B2  
JP3073786B2  
JP3072533B2  

Matches 801 - 850 out of 3,805