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Patent Searching and Data


Matches 851 - 900 out of 1,950

Document Document Title
JP08015609
PURPOSE: To compensate aberrations and curvature of field while keeping the balance, to make the lens comparatively bright am to take close-up photography by comprising a first to a third lens groups having specified refractive powers an...  
JP08007603
PURPOSE: To provide a spotlight possessing heat insulating action and downsized shape. CONSTITUTION: The housing 21 os a spotlight is formed into a double structure composed of an interior wall and an exterior wall, and its member throug...  
JP08005906
PURPOSE: To provide the large aperture telephoto lens which enables photography from infinite distance to a point about -1/2 magnification by arranging a movable lens group in a lens system which is subordinate to a main lens system and ...  
JP08007606
PURPOSE: To develop a shutter blade which is an iris unit constituting member of a spotlight. CONSTITUTION: Black zinc galvanizing 43 is performed on the surface of a thin iron plate with flexing elasticity and fluorine-contained grease ...  
JP08005910
PURPOSE: To obtain the lens system with excellent aberrations which consists of a small number of elements and has, specially, an F number of 4-5.6 and a half field angle of about 23°-27° and is suitable for a read of facsimile, etc., ...  
JP08007605
PURPOSE: To perform the adjustment of iris opening and closing degree easily and surely by providing an iris unit operating dial on the side face of a spotlight equipment body. CONSTITUTION: An iris unit 27 is interposed between a metal ...  
JP08005966
PURPOSE: To provide the aspherical spectacle lens which is a spectacle lens having minus diopters for shortsightedness correction, and superior in optical performance, thin in rim thickness, and excellent in outward appearance. CONSTITUT...  
JP08005967
PURPOSE: To provide the aspherical spectacle lens which is a spectacle lens with plural diopters that is used principally by a farsighted person or presbyopic person, and superior in optical performance, thin in the outward appearance, a...  
JP07333495
PURPOSE: To provide a photographing lens whose entire length is made short, whose F-number is made small and which secures sufficient brightness. CONSTITUTION: A diaphragm 10, a 1st concave lens 11 whose concave surface is faced to an ob...  
JP07333496
PURPOSE: To provide a method for selecting the optical material of a color correction lens system. CONSTITUTION: Concerning the prescribed lens system, the terms of colors in axial direction are generated and concerning the prescribed le...  
JP07333494
PURPOSE: To obtain a photographing lens whose entire length is relatively short, where chromatic aberration of magnification and distortion aberration are completely compensated and which is suitable for a film unit with a lens or a fixe...  
JP07325250
PURPOSE: To obtain a photographic lens system which is well corrected in both of sagital astigmatism and meridional coma aberration at an intermediate angle of view and the max. angle of view by using glass having high refractive index f...  
JP07325258
PURPOSE: To provide an endoscope system which permits free attachment and detachment of rigid endoscopes of different image transmission types; a lens relay type and a fiber relay type, selectively to the same TV camera, permits free rot...  
JP07325251
PURPOSE: To provide an imaging lens which is small in size, light in weight and has a wide angle of view while maintaining sufficient performance. CONSTITUTION: This imaging lens is composed of three elements in three groups consisting, ...  
JP07325254
PURPOSE: To provide a novel zoom lens which is composed of three elements in two groups, is small in the number of constituting lens elements and is realized with compact and with which a wide variable power region, brightness and high p...  
JP07301748
PURPOSE: To excellently compensate magnified chromatic aberration and a Petzval sum, to balance on-axis performance by suppressing monochromatic spherical aberration and to obtain good picture quality over a whole screen by using a grade...  
JP07294804
PURPOSE: To easily provide the excellent performance by making one and more sheets of lenses graded index lenses among three lenses. CONSTITUTION: A first to a third group are successively arranged from the object side to the image side,...  
JP07294812
PURPOSE: To impart a wide angle to the lens, to excellently compensate chromatic aberration and to increase MTF for high spacial frequency by composing the lens of the specified four-group four-lens constitution. CONSTITUTION: A first gr...  
JP07294808
PURPOSE: To obtain a wide viewing angle and to compensate chromatic aberration by using a lens material of the small difference of dispersion by specifying the constitution of a first lens to a third lens. CONSTITUTION: This lens is comp...  
JP07294810
PURPOSE: To reduce a number of lenses. to make a half viewing angle a wide angle of 20°, to excellently compensate chromatic aberration in a wide wavelength region and to increase MTF for a high special frequency by composing the lens o...  
JP07270681
PURPOSE: To provide a photographic lens having a bright F-value, a wide angle and a short full length and excellently corrected in various kinds of aberrations. CONSTITUTION: In the photographic lens, a positive first lens L1 whose conve...  
JP07261126
PURPOSE: To provide a short distance correction lens which is equipped with the vibrationproof function, small-sized and high in performance, and suitable for photographs, videos, etc. CONSTITUTION: The short distance correction lens equ...  
JP07253538
PURPOSE: To apply the system to a photographic optical system using two and more solid-state image pickup elements, to lengthen a back focal length, to reduce the angle of off-axis principal ray, to make the system high performance and t...  
JP07253537
PURPOSE: To apply the system to a photographic optical system using plural solid-state image pickup elements, to lengthen a back focal length and to reduce the angle of off-axis principal ray by comprising a condenser lens group having a...  
JP07253533
PURPOSE: To provide a compact objective lens of inner focus type having excel lent image forming performance at the time of focusing at a near distance. CONSTITUTION: An objective lens of inner focus type is provided, in order from the o...  
JP07253536
PURPOSE: To provide the excellent quality of picture whose aberrations including distortion aberration and the curvature of field are compensated while ensuring a working space for wiping out dust stuck to a monitor due to static electri...  
JP07253532
PURPOSE: To remove off-axis aberrations of a light, beam containing many kinds of aberration by providing a light shield film for reducing off-axis aberrations that an off-axis light beam around a main light beam emitted from one point o...  
JP07239439
PURPOSE: To obtain a lens for reading an original which can be made compact because the constituting number of lenses is small and which is constituted so that a wide viewing angle or high performance can be easily realized by using a gr...  
JP07239440
PURPOSE: To provide a magnifying lens capable of increasing an magnification of a microscope having a high performance with simple and compact optical constitution by arranging plural lens groups into the convergent luminous flux formed ...  
JP07234357
PURPOSE: To obtain the loupe which has about ×4.5 power and also has various aberrations compensated excellently and is inexpensive by making the radii of curvature of three positive lenses common. CONSTITUTION: This loupe consists of a...  
JP07230034
PURPOSE: To obtain the image re-formation optical system which has superior optical performance although the overall length is short and the constitution is relatively simple by providing a front and a rear group which are composed of 1s...  
JP07218976
PURPOSE: To exactly decide the effective diameter of an optical system by deciding the effective diameter based on object information in an extreme state to be handled by that optical system. CONSTITUTION: The main part of an effective d...  
JP07209578
PURPOSE: To easily and effectively cut off ghost light without increasing the cost by providing a stop which is rectangular or in a similar shape behind a meniscus lens. CONSTITUTION: A 1st lens L1 is a convex meniscus lens which is conv...  
JP07192504
PURPOSE: To provide a projector-type headlight which can be switched from a luminous intensity distribution pattern state suitable for driving in a common road to a luminous intensity distribution pattern state suitable for driving on hi...  
JP07181390
PURPOSE: To provide a compact macro-lens having a relatively small delivering quantity in focusing, and capable of performing a high power photographing having a photographing distance to some degree. CONSTITUTION: This lens is formed of...  
JP07181386
PURPOSE: To provide a small-sized, lightweight, and high performance zoom lens using refractive index distribution type lens having a refractive index change in the optical axial direction. CONSTITUTION: This zoom lens has, in order from...  
JP07181380
PURPOSE: To improve a conventional optical system for front diaphragm and provide a lens system substantially having zero distortion aberration, and sufficiently ensuring the back focus. CONSTITUTION: A lens system for front diaphragm is...  
JP07181385
PURPOSE: To provide a small-sized, lightweight, and high performance zoom lens using a refractive index distribution type lens having a refractive index change in the optical axial direction. CONSTITUTION: This zoom lens has, in order fr...  
JP07181373
PURPOSE: To provide a gauss type photographic lens in which spherical aberration and sagital coma are satisfactorily corrected with a little lens number. CONSTITUTION: In a gauss type photographic lens having a front group GF of positive...  
JP07181378
PURPOSE: To ensure a long back focus, compared with the focal length, and project a projected image which is satisfactorily aberration-corrected over the whole area of a projecting screen even when the F number is minimized. CONSTITUTION...  
JP07174964
PURPOSE: To obtain a compact image-forming lens constituted of a small number of component lenses, easily to be made to have a larger aperture, and having excellent performance by constituting the lens of two groups of two lenses being p...  
JP07168093
PURPOSE: To realize an imaging lens that is long in back focus, able to reduce an incident angle of an incident beam of light into a solid camera element, bright and wide in a field angle, in addition to being possible for miniaturizatio...  
JP07168095
PURPOSE: To secure a small lens system, being high performance at a wide field angle and bright, with a triplet lens of 3-group/three sheet constitution, by forming at least one surface of both second and third lenses into aspheric surfa...  
JP07168092
PURPOSE: To realize an imaging lens by means of two lenses, which is long in a back focus, able to take a field angle relatively wider, bright and compact in size, in addition to making cost-down promotable by regulating the extent of va...  
JP07159697
PURPOSE: To provide a microscopic objective lens which is as bright as ≥0.2 in NA, is as small in the number of lens elements as about three elements and is capable of well correcting aberrations by having one element of specific radia...  
JP07146435
PURPOSE: To provide a radial direction refractive index distribution type optical relay for excessively correcting a color aberration in an axial direction and the manufacturing method. CONSTITUTION: This relay 35 is provided with at lea...  
JP07146436
PURPOSE: To remove effectively flare light in a light emitting wave length of an LED, and reduce crosstalk when it is arrayed by arranging a dye layer on a side surface so as to absorb light having a specific wave length. CONSTITUTION: I...  
JP07140387
PURPOSE: To make the dust and foreign matter in the finder hardly visible while having a variable power ratio by moving a second lens group to change magnification and satisfying specific conditions. CONSTITUTION: This finder has an obje...  
JP07140385
PURPOSE: To provide the projection optical system which decreases image distortions, is compact and has a high numerical aperture by consisting this optical system of a first lens group having a positive refracting power, a second lens g...  
JP07128571
PURPOSE: To reduce blur quantity by a small quantity of rotating operation of a focus ring when zooming is performed to a telephotograph side after focus adjustment is performed at the wide-angle end by making a control circuit have a fu...  

Matches 851 - 900 out of 1,950