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JP63274904 |
PURPOSE: To obtain a bright lens for microfilm projection whose overall length is short by composing the lens system of five lens elements in five groups and making the lens system meet specific requirements. CONSTITUTION: The lens syste...
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JP63273809 |
PURPOSE: To make a lens system compact and to reduce its cost by using a lens system of four-group, four-element constitution which meets specific requirements. CONSTITUTION: This lens system consists of a 1st positive meniscus lens whic...
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JP63273806 |
PURPOSE: To reduce a spherical aberration even when a numerical aperture is increased by combining plural cylindrical lenses. CONSTITUTION: A 1st group lens 1, a 2nd group lens 2, and a 3rd group lens consist of cylindrical lenses which ...
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JP63273807 |
PURPOSE: To obtain a small-sized, lightweight objective for video disk reproduction by using specific aspherical surfaces for both 1st and 2nd surfaces. CONSTITUTION: The 1st and 2nd surfaces are both aspherical, and those aspherical sur...
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JP63259612 |
PURPOSE: To reduce a variation of a focal distance by adopting an aspherical surface for each one face of second (=1 fifth) lens, and a third (=a fourth) lens, and allowing it to satisfy a specific condition. CONSTITUTION: An aspherical ...
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JP63253912 |
PURPOSE: To constitute the titled device so that optical glass data within some range are outputted automatically in a classified state in a prescribed sequence from a target value, by coupling an external storage device having optical g...
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JP63253318 |
PURPOSE: To facilitate the recognition, correction and modification of each element data by inputting and displaying the data while it is recognized on a display device for the unit of each element composing an optical system. CONSTITUTI...
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JP63247712 |
PURPOSE: To obtain the titled lens system which is compact and has the exit pupil position far from a focal plane by constituting an auxiliary optical system having 2 lens groups having positive and negative refracting powers successivel...
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JP63247713 |
PURPOSE: To obtain the titled lens which is well corrected of an aberration fluctuation and has a large aperture ratio by allowing an optical system having 4 lens groups which have positive, positive, negative and positive refracting pow...
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JP63246713 |
PURPOSE: To obtain a single lens which is well corrected of a magnification chromatic aberration by specifying the relation among a focal length, lens thickness and a distance from a 2nd face to a stop. CONSTITUTION: This lens satisfies ...
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JP63239413 |
PURPOSE: To obtain a small-sized, lightweight, and high-performance reading lens by specifying the total system focal length, F number half view angle, radii of curvature, surface gaps, refractive indexes, and Abbe numbers of a lens syst...
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JP63226611 |
PURPOSE: To permit automatic focusing which can satisfactorily correct aberrations for a wide range of objects by forming a photographing lens of ≥2 groups and subjecting the two lens groups to floating movement in such a manner that t...
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JP63220210 |
PURPOSE: To satisfactorily correct aberrations and to shorten the overall length of a lens system to make it miniaturized and light-weight by satisfying a specific condition between radiuses of curvature of the object-side surface and th...
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JP63220209 |
PURPOSE: To use an electronic still video camera and to perform accurate exposure control by driving a mobile member provided with plural fixed stops by a driving mechanism to set a preliminarily determinate fixed stop on the optical axi...
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JP63210906 |
PURPOSE: To reduce performance deterioration due to an axis deviation between surfaces and the eccentricity of a lens carrier which are caused in lens machining by satisfying specific conditions as to the focal length, on-axis thickness,...
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JP63210810 |
PURPOSE: To provide a large magnification with simple constitution and to decrease difficulty in working by consisting a 1st lens of a positive meniscus lens the convex surface of which is directed to the object side and the 2nd lens of ...
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JP63208816 |
PURPOSE: To correct aberration variation at the time of focusing excellently within a wide body-distance range from an infinite-distance body to a short- distance body while employing a rear focus system by providing four lens groups and...
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JP63208014 |
PURPOSE: To prevent generation of a ghost flare by an out-of-image plane luminous flux by constituting a 1st reflecting member of a prism which has an object side incident face, reflecting face, and exit face provided on a 2nd reflecting...
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JP63205626 |
PURPOSE: To satisfactorily correct aberration by successively arranging a condenser lens group having positive refracting power, 1st mirror which deflects an incident luminous flux at a right angle, master lens group which has positive r...
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JP63205625 |
PURPOSE: To prevent deterioration in aberration by moving a front group and rear group to an object side at different moving speeds at the time of focusing from a far distance to a near distance and forming the titled lens in a manner as...
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JP63199312 |
PURPOSE: To obtain a lens system having a high aberration correcting effect and constituted so as to be used for a video camera or an electronic camera by constituting the lens system of 1st, 2nd, 3rd, and 4th lenses arranged successivel...
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JP63195617 |
PURPOSE: To obtain excellent contrast over the entire image plane by using a Topogon type of four-group, four-element constitution and satisfying specific numerals. CONSTITUTION: This is the Topogon type of four-group, four-element const...
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JP63194214 |
PURPOSE: To obtain the titled lens which is compact constitution with less short range variation of aberration, by constituting specific three lens groups, and satisfying specific conditions. CONSTITUTION: A first lens group consists of ...
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JP63192006 |
PURPOSE: To reduce the degradation in capacity due to eccentricity of the surface and the change of the thickness of a disk by forming one surface into a plane and canceling remaining higher-order aberrations and the spherical aberration...
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JP63188115 |
PURPOSE: To easily design and to manufacture a beam shaping optical system with a high precision by satisfying specific conditions between the extent of dissatisfaction of the sine condition of a front group of the optical system and tha...
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JP63188116 |
PURPOSE: To obtain an optical system which has the wavefront satisfactorily corrected to be superior in massproductivity, by satisfying a specific condition among the refractive index, the focal length, the numerical aperture of a spheri...
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JP63188109 |
PURPOSE: To sufficiently correct aberrations by providing the first area which has a convex and consists of a uniform medium, the second area which is brought into contact with the first area on the side opposite to the convex and has a ...
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JP63186207 |
PURPOSE: To minimize the bend of a radial image plane by separating 1st and 2nd lenses of an orthometopic type to make a titled lens into 6-group 6-element constitution which satisfies the specific condition equations. CONSTITUTION: This...
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JP63180924 |
PURPOSE: To provide a lens which satisfactorily maintains performance in unmagnification W enlarge copying and unmagnification W reduction copying with good balance by simplifying lens constitution to 3-groups 3-elements and satisfying s...
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JP63180925 |
PURPOSE: To obtain a compact wide angle lens which is satisfactorily corrected in various aberrations and has a short overall length by consisting the lens of a front group having negative refracting power and a rear group having positiv...
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JP63179308 |
PURPOSE: To compensate excellently aberration variation when a body within a range from infinite distance to short distance is put in focus by specifying the constitution of a photographic lens which has two lens groups and the refractin...
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JP63174008 |
PURPOSE: To adjust an eccentric aberration and to improve optical characteristics by arranging negative lens which have large refracting power in front of and behind a diaphragm, and fixing eccentrically at least one of plural positions ...
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JP63168615 |
PURPOSE: To improve the focusing capacity by optimizing the shape of a cathode-ray tube fluorescent surface and a lens for the purpose of correcting the curvature and the astigmatism. CONSTITUTION: If the distance between the fluorescent...
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JP63165813 |
PURPOSE: To reduce lens back variation due to a change in temperature and to suppress cost up by using plastic lenses respectively having negative and positive refraction force to constitute a main lens and a rear converter lens. CONSTIT...
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JP63161423 |
PURPOSE: To obtain a compact zoom lens having a high variable power ratio by arranging at least one distributed index lens having the refractive index distribution in the direction of the optical axis in one lens group of a lens system w...
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JP63159818 |
PURPOSE: To obtain a lens in which an aberration variation extending from a wide angle end to a telephoto end scarcely occurs, and also, an image surface extending from the center part of a screen to the peripheral part is flat, by const...
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JP63155015 |
PURPOSE: To improve the read performance by constituting a lens system of six lenses of five groups, namely, a first positive lens, a second positive lens, a third negative lens, a fourth negative lens, a fifth positive lens, and a sixth...
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JP63155102 |
PURPOSE: To easily compensate a spherical aberration for colors at low cost by composing an aspherical cemented lens of a lens which has an aspherical cemented surface, a lens which forms a gap part with the aspherical cemented surface a...
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JP63148220 |
PURPOSE: To obtain an image of high picture quality up to a corrected marginal part by composing a lens system of a 1st group positive lens, a 2nd group negative lens, a 3rd group positive lens, a 4th group with small refracting power, a...
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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...
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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, ...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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