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Patent Searching and Data


Matches 1,001 - 1,050 out of 1,948

Document Document Title
JP01245213A
PURPOSE: To shorten a projection distance to a projection screen by providing a divergent concave and convex lens, a convergent concave and convex lens, a convergent double convex lens and a divergent double concave lens in the order fro...  
JP01046720A
PURPOSE: To obtain an optical device to be used for processing a new type optical signal by using a Fabry-Perot cavity consisting of a partial waveguide part and a partial non-waveguide part. CONSTITUTION: The cavity consists of a partia...  
JP63318512A
PURPOSE: To form a compact lens system whose various aberrations are sufficiently corrected by constituting the lens system of four groups and specifying the system with specific conditions. CONSTITUTION: The lens system is constituted o...  
JP63318511A
PURPOSE: To shorten the whole length of a lens and to simplify the constitution of the lens by arranging a water-proof glass consisting of a positive lens turning its convex face to the object side and a main lens having positive refract...  
JP63316814A
PURPOSE: To obtain excellent contrast and to reduce the size and cost of a triplet type copying lens by setting its half field angle to 19.4° and giving a fixed ratio of focal length to the radius of curvature and surface-to-surface dis...  
JP63316815A
PURPOSE: To reduce the weight of a focusing group by satisfying 0.15
JP63314512A
PURPOSE: To obtain an objective lens for fiber which is bright and free from an aberration, and also, can measure exactly a distance and thickness of a body to be measured, by allowing the objective lens constituted of seven groups and e...  
JP63311222A
PURPOSE: To obtain a shading-less and compact image-forming lens, by attaching a positive refracting power as a whole, and satisfying specific conditions by the lenses in a front group and a rear group. CONSTITUTION: As basic constitutio...  
JP63311223A
PURPOSE: To realize stigmatization with a few number of sheets of lenses, by satisfying a various kinds of specific conditions with a lens system consisting of six groups. CONSTITUTION: The titled system consists of six groups, a first l...  
JP63307414A
PURPOSE: To satisfactorily compensate respective aberrations with low-cost glass materials in a compact constitution by arranging a diaphragm a short length behind positive meniscus, negative double concave, and positive double convex le...  
JP63306411A
PURPOSE: To enable image formation on a prescribed image plane in the state in which aberration are well corrected at all times by selecting the radii of curvature, thicknesses, refractive indices, dispositions, etc., of respective lense...  
JP63305315A
PURPOSE: To inexpensively constitute a compact telephoto lens large in diameter and high in performance by arranging an achromatic concave lens system constituted of a single group consisting of two lenses on the back of a semiaprochroma...  
JP63294502A
PURPOSE: To forbid the movement of an image point even if a lens inclines by forming the whole or part of at least one face of the lens, whose faces is not required to be passed with rays, to a spherical shape so that the center of curva...  
JP63293515A
PURPOSE: To improve magnification chromatic aberration while keeping compact property and to obtain excellent workability by dividing a converging lens group arranged immediately after a diaphragm into two groups and setting up the Abbe ...  
JP63291019A
PURPOSE: To reduce a coma aberration and astigmatism and to reduce the deterioration of a picture due to a chromatic aberration by using a lens system with positive refracting power as a 1st group lens arranged on the outermost object si...  
JP63281112A
PURPOSE: To obtain a bright lens system whose outside diameter is small and whose overall length is short, by constituting an objective lens constituted of three groups and four pieces, so as to satisfy a specific condition. CONSTITUTION...  
JP63276013A
PURPOSE: To reduce the variation of an aberration in the course of variable power, and to set a zoom ratio to about two, by forming the front group and the rear group by a negative lens and a positive lens, and a positive lens and a nega...  
JP63276012A
PURPOSE: To maintain a view angle and a sufficient back-focal distance of a lens for a 35mm size single-lens reflex camera, by providing a first lens group, a second lens front group, an optical member for erecting a second image, and a ...  
JP63274904A
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...  
JP63273809A
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...  
JP63273806A
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 ...  
JP63273807A
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...  
JP63259612A
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 ...  
JP63253912A
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...  
JP63253318A
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...  
JP63247712A
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...  
JP63247713A
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...  
JP63246713A
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 ...  
JP63239413A
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...  
JP63226611A
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...  
JP63220210A
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...  
JP63220209A
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...  
JP63210906A
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,...  
JP63210810A
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 ...  
JP63208816A
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...  
JP63208014A
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...  
JP63205626A
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...  
JP63205625A
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...  
JP63199312A
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...  
JP63195617A
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...  
JP63194214A
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 ...  
JP63192006A
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...  
JP63188115A
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...  
JP63188116A
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...  
JP63188109A
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 ...  
JP63186207A
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...  
JP63180924A
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...  
JP63180925A
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...  
JP63179308A
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...  
JP63174008A
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 ...  

Matches 1,001 - 1,050 out of 1,948