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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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 ...
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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: ...
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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...
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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...
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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...
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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 ...
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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 ...
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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 ...
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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...
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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...
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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 ...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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 ...
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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...
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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...
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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...
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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...
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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 ...
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JP62273506 |
PURPOSE: To miniaturize an optical system, which is composed of the 1st and 2nd lens groups assembled in such a way that their optical axes can be made coincident with each other and forms the real image of incident light by leading the ...
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JP62273505 |
PURPOSE: To obtain a wide-angle visual field, by constituting an objective lens for endoscope of a distributed index single lens which has a flat or convex surface on the object side, convex surface of the image side, and extremely small...
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JP62272220 |
PURPOSE: To correct various aberration and to reduce the size and weight of an optical system for a video camera by forming a resin layer with a prescribed face shape on either one surface or both the surfaces of an infrared-ray cutting ...
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JP62269922 |
PURPOSE: To attain chromatic aberration correction required for the mode hopping counterplan of a semiconductor laser by the whole optical system by providing a collimater lens with excessively corrected chromatic aberration near the wav...
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JP62267701 |
PURPOSE: To enable the utilization of a lens in the infrared region including the wave length of CO2 laser light by increasing the refractive index of the central part of a material transmitting light in the infrared region. CONSTITUTION...
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JP62265611 |
PURPOSE: To contrive compactness of a projection lens for a wide angle projector and reduction of the cost of the lens system by constituting a lens system of five lens groups so that at least the 1st group has one aspherical surface and...
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JP62262012 |
PURPOSE: To obtain the titled lens which has a good image formation performance extending over the whole visible region, and also, can satisfy the demand for a small size and a light weight, by constituting said lens with five groups of ...
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JP62262019 |
PURPOSE: To sufficiently correct for a spherical aberration and a comatic aberration by specifying an equal refractive index distribution surface in a refractive index variation area. CONSTITUTION: A surface 2A which becomes a light beam...
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JP62260114 |
PURPOSE: To obtain a wide angle lens which have various aberrations compensated and is suitable for a middle-sized camera, by constituting the wide angle lens with seven lenses of seven groups and satisfying specific conditions. CONSTITU...
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JP62246155 |
PURPOSE: To well compensate the spherical aberration due to a condenser lens to form a condensed light spot approximating the state of no aberrations by arranging a spherical aberration generating means which compensates the spherical ab...
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JP62244010 |
PURPOSE: To constitute the titled lens so that each aberration is corrected satisfactorily in the whole area extending from an infinity photographing distance to the closest focusing distance, by maintaining a full-aperture F value, by m...
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