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Matches 1,051 - 1,100 out of 1,941

Document Document Title
JP63147123
PURPOSE: To perform high-performance floating while compensating excellently aberrational variation when a body in a wide long and short distance range is put in focus by composing a photographic lens of four groups and moving them speci...  
JP63147126
PURPOSE: To vary image plane characteristics optionally by composing a photographic lens of three lens groups, moving those under specific conditions for high-performance floating while aberrational variation is compensated excellently, ...  
JP63147122
PURPOSE: To compensate variation in optical characteristics due to temperature variation by composing an objective lens system of plural lens elements and satisfying specific conditions as to the refractive indexes, temperature variation...  
JP63147124
PURPOSE: To perform high-performance floating while compensating excellently aberrational variation when a body in a wide long and short distance range is put in focus by composing a photographic lens of four lens group and moving them u...  
JP63147125
PURPOSE: To enable image plane characteristics to be varied optionally by moving three lens groups on an object side among four groups under specific conditions for high-performance floating while aberrational variation is compensated ex...  
JP63146010
PURPOSE: To obtain a lens system which has various aberrations, specially, a Petzval's sum compensated excellent and further has a small telephoto ratio and a large field angle, although the distributed index lens is used scarcely, by sp...  
JP63143516
PURPOSE: To compensate various aberrations excellently with a small number of lens elements and to shorten the overall length of a lens system and compact it by using a distributed index lens as ≥1 lens element of each of a front group...  
JP63141011
PURPOSE: To preclude an axis shift and to improve the accuracy of a lens by providing plane parts which contact each other outside the effective optical paths of the 2nd and the 3rd lenses, and adhering the 2nd and the 3rd lenses on thos...  
JP63139311
PURPOSE: To obtain a large aperture ratio lens which is small in moving extent of a focusing lens group and capable of closeup photographing, by allowing a lens system provided with three groups of lenses having a refractive power of pos...  
JP63139312
PURPOSE: To obtain the titled lens which has corrected a chromatic aberration, as well, by allowing a lens system consisting of five groups having a refractive power of positive, negative, positive, positive and negative, respectively in...  
JP63135911
PURPOSE: To well correct aberration from the center to the periphery of a screen and to obtain a considerably high MTF value, by specifying relation among synthesized focal distance in all systems, the focal distance of a first group len...  
JP63133112
PURPOSE: To provide a high vignetting factor throughout a screen and shorten the back focus by providing four lens groups and specifying focal length, radiuses of curvature of lens faces, lens thicknesses, and air intervals. CONSTITUTION...  
JP63124011
PURPOSE: To satisfactorily correct a chromatic aberration and a tertiary aberration by a small number of lenses, by combining at least one piece each of lenses by which a refractive index of a medium is heterogeneous, especially, increas...  
JP63118708
PURPOSE: To attain the effective movement of an image with small eccentricity by arranging a moving optical element satisfying a specific condition between the horizontal magnification of a moving optical element and the magnification of...  
JP63115120
PURPOSE: To compensate deterioration in optical characteristics due to temperature variation by selecting properly the refractive index, temperature variation coefficient, and focal length of the material of a plastic lens at room temper...  
JP63104009
PURPOSE: To obtain a constant speed scanning lens with high resolution, which has a small F-number and a wide view angle, and whose various aberrations are corrected satisfactorily, by satisfying a first W third lens constitutions and va...  
JP63100413
PURPOSE: To correct the spherical aberration by having a gradient of refractive index in the direction of the optical axis and forming at least one face into a spherical surface which has the center of curvature on the optical axis. CONS...  
JP63096619
PURPOSE: To realize rear focusing with a long back focus by satisfying specific inequalities by a fixed group with negative refracting power, a fixed group with positive refracting power, and a lens which has positive refracting power an...  
JP63096616
PURPOSE: To obtain high resolution and a large angle of view by providing a spherical lens and a light receiving surface which is curved along the curved image surface formed by the spherical lens. CONSTITUTION: An image pickup device co...  
JP63096617
PURPOSE: To obtain a wide angle of view and high resolution by processing an image signal from an image pickup means which have a light receiving plane formed by a spherical lens. CONSTITUTION: The image pickup means consists of the sphe...  
JP63096618
PURPOSE: To obtain a wide angle of view and high resolution by arranging a spherical lens, an optical transmission member bundle whose incidence ends are arranged on or nearby a curved image plane formed by the lens, and an image pickup ...  
JP63096620
PURPOSE: To obtain a bright triplet type lens with a wide angle of view by composing the lens of two lenses which have positive refracting power and are in specific relation and a lens which have negative refracting power. CONSTITUTION: ...  
JP63081413
PURPOSE: To approximately completely correct the spherical aberration by forming concentric spheres with a spherical shell-shaped lens consisting of a medium having a refractive index n1 and a spherical lens which exists in said lens and...  
JP63081311
PURPOSE: To obtain a long back-focal distance photographing lens of high optical performance well corrected for various aberrations by specifying the form and constitution of lenses of the front group and rear group. CONSTITUTION: The le...  
JP63081310
PURPOSE: To obtain a long back-focal distance photographing lens of high optical performance properly corrected for aberrations by specifying the form and constitutions of lenses of a first group and a second group. CONSTITUTION: The len...  
JP63081309
PURPOSE: To obtain a long back-focal distance photographing lens properly corrected for aberrations and having good optical performance by specifying the form and constitution of lenses of a front group and rear group. CONSTITUTION: The ...  
JP63077005
PURPOSE: To enable stopping down of a beam to the size smaller than the diffraction limiting value of a lens by providing two sheets of reflective films which allow partial transmission of the amplitude of light waves and partly reflect ...  
JP63075721
PURPOSE: To realize a high-performance lens which is usable as the reduction lens of a high-density solid-state image pickup lens although its half field angle is 22° by composing the lens system of six lens elements in four groups and ...  
JP63075720
PURPOSE: To read a wide color original of 12 inches with high density without any deviation among colors by composing a lens system of six lenses in four groups and satisfying specific conditions. CONSTITUTION: The lens system consists o...  
JP63075718
PURPOSE: To obtain a sufficient back focus and to obtain excellent aberrations by composing a lens system of five lens elements in four groups and making lens various items meet specific requirements. CONSTITUTION: The lens systems consi...  
JP63070817
PURPOSE: To simplify a mechanism of the periphery of a lens system, and also, to obtain a video camera use single focus lens of a high performance, which is small in size, light in weight and low in cost, by an extremely small number of ...  
JP63070818
PURPOSE: To obtain a magnifying closeup lens having a large aperture ratio, whose astigmatism and comatic aberration are corrected satisfactorily, by feeding out the whole lens system to an object side while varying an air interval betwe...  
JP63070216
PURPOSE: To excellently compensate aberrational variation at the time of focusing by arranging 8th lens which has at least three positive lenses on the image plane side of a 7th lens and setting their lens shapes so that three inequaliti...  
JP63065416
PURPOSE: To improve aperture efficiency and to contrive to increase a peripheral light quantity by using a retrofocus type lens arranging a negative meniscus lens turning its convex surface to the object side as the 1st lens. CONSTITUTIO...  
JP63058411
PURPOSE: To perform normal extending operation by making resetting operation of a stepping type lens barrel driving mechanism before photographing and thereby releasing abnormal state even when the lens barrel is not in a regular initial...  
JP63058308
PURPOSE: To obtain resolving power up to a peripheral part by arraying a 1st aspherical lens whose refracting power is almost zero, a 2nd meniscus lens and a 3rd meniscus lens which are convex to a screen side, and a 4th negative lens su...  
JP63040116
PURPOSE: To correct each aberration so as to be well-balanced, by constituting a firstWa fifth lens groups of a positive meniscus lens whose convex surface has been turned to an enlargement side, a negative meniscus lens whose concave su...  
JP63039151
PURPOSE: To prevent relative position deviation of light spots for erasure and recording/reproduction at tracking control and to contrive to relieve the load on an actuator through thin profile and light weight by constituting an objecti...  
JP63032511
PURPOSE: To obtain a compact and inexpensive lens in which each aberration has been corrected in a high level, by providing a positive meniscus lens whose convex surface has been turned to an object side, a biconcave lens, a biconvex len...  
JP63025611
PURPOSE: To obtain high image forming performance in spite of the small-sized lens system constituted of the small number of lenses, to increase the efficiency of aperture and to reduce the production cost of the lens system by constitut...  
JP63023118
PURPOSE: To obtain a single small-sized lens, with which a refractive index distribution can be easily formed and which is excellent in aberration correction and usable for an image pickup system, by forming the lens to an almost spheric...  
JP63019612
PURPOSE: To improve the performance of a projection lens by combining ≥2 kinds of glass materials whose refractive indexes due to abnormal dispersion of specific wavelength are controlled. CONSTITUTION: Light of an (i) ray (365 or 313n...  
JP63008625
PURPOSE: To make it unnecessary to control a temperature of a semiconductor laser, and also, to obtain a holding body at a low cost by constituting the titled lens of one group and two pieces formed by placing a convex lens and a concave...  
JP63006512
PURPOSE: To manufacture an inexpensive lens with satisfactory workability and uniform characteristic, by using a synthetic quartz lens as a first lens raw material, and using a fused quartz lens as a second lens. CONSTITUTION: A syntheti...  
JP63004213
PURPOSE: To adjust the distance between body images over a wide range by varying the remaining refracting index of one lens in the direction of an optical axis except a part which has specific thickness in the optical-axis direction and ...  
JP62296105
PURPOSE: To easily form an optical coupler having an excellent coupling efficiency by a simple process, by constituting an optical system of two lenses of two groups and specifying the media and shapes of both lenses. CONSTITUTION: An op...  
JP62294214
PURPOSE: To photograph a document, especially, an original of about A4 size on a sheet film or the like by arranging the firstWfourth lenses in order from the object side to the image side. CONSTITUTION: The first lens 10, the second len...  
JP62287212
PURPOSE: To obtain a lens for optical recording and reproduction suitable to mass-production by forming the lens which has a refractive index gradient in the direction of an optical axis and a constant refractive index in a plane crossin...  
JP62278519
PURPOSE: To confirm a focusing state accurately by interposing a low-pass filter between the 1st and the 2nd lenses of five-element constitution, setting specific conditional inequalities among the focal lengths, surface gap distance, ra...  
JP62278520
PURPOSE: To optimize the shape of the fluorescent surface of a projection tube and a projection lens and to improve focusing performance by setting the fluorescent surface normal and center axis of the projection tube and the projection ...  

Matches 1,051 - 1,100 out of 1,941