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Patent Searching and Data


Matches 801 - 850 out of 3,859

Document Document Title
JP2002214527A
To obtain a bright lens for reading an image, whose depth of focus is large and whose angle of view is large while coping with high resolution, and an image reader using the lens.This lens has six lenses, that is, a 1st positive lens bei...  
JP2002203333A
To provide a beam-condensing optical system and an optical pickup device that enable a plurality of types of optical information recording mediums to be recorded and reproduced.An objective lens 3 is used in an optical pickup device for ...  
JP2002519707A
(57) The six-element type projection lens system (13) for using for a summary CRT projection type television receiving set (10) is offered. This lens system has +*+++* structure from the screen side. In order to offer the improved compre...  
JP2002517773A
(57) Object lens which adopts three lens units (U1, U2, U3) which have a summary negative (or positive weak), positive, and a negative form. A lens boils the relative aperture f / below 5, and has all the view blanket regions of at least...  
JP2002162561A
To obtain a compact photographic lens, having high resolution, constituted of a small number of lenses, having long back focus and made excellent in telecentricity on image side.This photographic lens is constituted, by arranging an aper...  
JP3306793B2
PURPOSE: To manufacture an image forming element easily by setting refraction factors along thickness of a transparent prism body to have an approximate refraction factor distribution to a specified curve of the second order, providing a...  
JP3307700B2
PURPOSE: To execute reading of high definition, to decrease the number of lens pieces, and to reduce the cost of lens working and assembly by constituting a triplet type lens by adopting a special aspherical lens for a second group. CONS...  
JP3306129B2
PURPOSE: To provide a standard lens having performance which is stable from an object point at infinity to the object point at short distance, having a constitution capable of keeping a mirror inhibiting area, and having a large aperture...  
JP2002131631A
To provide a single focus lens whose entire length is short and which can principally obtain optimum optical performance for a photographing lens and does not require the high manufacture technique.The single focus lens 1 is equipped wit...  
JP3302072B2
PURPOSE: To obtain a high performance photographic lens suitable to a lens shutter camera with less performance deterioration to the peripheral part of a film plane though the lens is simply constituted. CONSTITUTION: As to a lens system...  
JP3301884B2
PURPOSE: To provide a bright ralay optical system comparatively small in size and high in image forming performance. CONSTITUTION: This system is provided with a first lens group G1 having comparatively weak negative refractive power, a ...  
JP2002082281A
To obtain a bright and compact large aperture ratio objective lens suited to a dark field optical device and capable of generating a large negative distortion aberration by forming telescopic constitution consisting of seven lenses of th...  
JP3288746B2
PURPOSE: To provide a high lightness telescopic lens, which can correct the aberration satisfactorily while the inner focus system is adopted and which can ensure good back focusing without prolonging the overall length. CONSTITUTION: A ...  
JP2002055278A
To provide an image pickup lens device equipped with a high variable power zoom lens system capable of making the reduction of cost compatible with compaction, having an F-value showing a bright condition and having the zoom ratio of abo...  
JP2002055275A
To obtain an inner focus type compact telephotographic lens whose half viewing angle is about 4 to 8°.This telephotographic lens is constituted of a 1st positive lens group, a 2nd negative lens group and a 3rd positive lens group in ord...  
JP2002031753A
To obtain a comparatively bright and compact wide-angle color image reading lens capable of excellently compensating aberration by constituting the lens of four lenses being four groups and satisfying a specified conditional expression.A...  
JP3272436B2
PURPOSE: To provide a distance-measuring method and device which can measure distance accurately even if there is a traveling displacement such as fine vibration on a surface to be measured. CONSTITUTION: The measuring device is provided...  
JP2002023050A
To provide a photographing lens constituted of two lenses being two groups, whose image surface illuminance is made bright without deteriorating optical performance and the assembling suitability of a camera.The photographing lens 10 is ...  
JP3270591B2
PURPOSE: To attain the improvement of the depth of field and the control of brightness corresponding to the characteristic of an endoscope by arranging a variable diaphragm in an optical system. CONSTITUTION: This device is used while in...  
JP2002006209A
To enable changing a radius of curvature at emitting reference plane wave in a wide range while keeping high accuracy, and also, to enable measuring an object to be inspected at an optional position dispensing with a large working space....  
JP3264978B2
PURPOSE: To make a bright, high-performance lens system possible with a small number of lenses by causing a first lens, which is a radial heterogeneous lens having positive refractive power, to meet specific conditions. CONSTITUTION: A f...  
JP2001350088A
To provide an inexpensive reading lens which has brightness by which higher speed reading is attained than a conventional original reader and will not contain lead arsenic, which are harmful to an environment at all.The lens 1 of positiv...  
JP2001350087A
To improve focusing accuracy.This device possesses an image pickup means 29, focus detecting means 22 and 23 to detect the focal position of a lens 1 attached, a luminous flux splitting means 28 to split luminous flux from the lens into ...  
JP2001337268A
To provide a wide-angle lens small in size, light in weight, capable of being produced at low cost and having a long exit pupil.This lens is provided with a 1st lens, a 2nd lens and a 3rd lens arranged in order from an object side, and a...  
JP3255490B2
PURPOSE: To provide a retro-focus type large aperture lens composed of six lenses and capable of improving various aberrations even with a F number of about 1.2 and a back focus longer than 1.1f by making a third lens a meniscus lens who...  
JP3254165B2
To obtain high reading density in the vicinity of image formation magnification 0.16535, to reduce cost and to obtain the sufficient angle of view and sufficient brightness by arranging 1st group to 4th group which are positive, negative...  
JP2001324675A
To provide a retrofocus type lens having long back focal length with reference to a focal distance, having telecentricity on a video source side and realizing wide viewing angle projection.A 1st negative group lens G1 has an aspherical l...  
JP3254239B2
PURPOSE: To obtain the intermediate telephoto lens which has a large diameter and has high optical performance from the infinite distance to a short distance by composing the 1st lens group of three positive meniscus lenses which have po...  
JP2001318310A
To provide a single focus lens by which excellent optical performance is obtained while making an entire length short by an inexpensive and simple configuration.A first meniscus lens L1 whose concave surface is faced to an object side, a...  
JP3247756B2
PURPOSE: To obtain a wide angle photographic lens of wide angle of view with small distance between a first surface and a final surface, high performance, and large aperture of F/2.8 class by constituting a lens system of a front group w...  
JP2001519542A
(57) In the image formation mode and the mode in which it does not image for summary amusement and the lighting for construction, the projection zoom lens system which offers the zoom ratio of 20: 1 in the mode in which it does not image...  
JP3242451B2
PURPOSE: To obtain a microscope objective lens which is bright and low in cost and has various aberrations excellently compensated by using a radial type gradient index lens which has a specific refractive index distribution radially fro...  
JP3239520B2
PURPOSE: To provide a photographic lens which is excellently assembled in the main body part of a film unit or a camera and small in spherical aberration and has high performance from the periphery to the center in spite of an asymmetric...  
JP2001281537A
To obtain an f.θ lens consisting of three lenses including a doublet, where transverse chromatic aberration and other aberration are made good by satisfying specified conditional expressions. A 1st lens L1 is a plano-concave lens whose ...  
JP2001281604A
To reduce aberrations, especially curvature of the field to each light beam from each light source to a very small size and the reduce influence of the heat from the light source to a low level, when the multi-beam scanning is performed,...  
JP2001281535A
To provide a Gauss type photographing lens whose image surface is flat from the center to an off-axis peripheral viewing angle and which has high performance while securing production propriety including cost by disposing the positive, t...  
JP2001281536A
To obtain a Gauss type lens realizing brightness equal to or above about F1.4, having the angle of view equal to or above about 24 degrees, securing sufficient back focus and excellently correcting aberration in spite of compact constitu...  
JP3234618B2
PURPOSE: To obtain the large-aperture intermediate telephoto lens which has various aberrations to a short-distance object point well compensated by composing the lens of a 1st and a 2nd lens group, a stop, and 3rd-5th lens groups, and s...  
JP2001515604A
(57) On the whole, summary book invention relates to the technology of stabilizing the alignment in an interferometer (5) and the rapid scanning type Michelson interferometer (5) used with a Fourier transform spectrometer much more in de...  
JP2001242377A
To realize miniaturization and high contrast and to correct aberration such as chromatic aberration.This lens is constituted by sticking a 1st lens 11 made of resin material and a 2nd lens 12 made of glass material, and provided with an ...  
JP3221765B2
PURPOSE: To provide the large-diameter macrolens which have aberrations compensated excellently from an infinite distance to a short distance corresponding to unmagnification by composing the lens of a front group which has at least one ...  
JP2001183578A
To provide a bright, inexpensive image pickup lens which is constituted of a small number of lenses, and which is used for a high performance CCD camera and a CMOS camera, etc. In the image pickup lens, at least one surface of a 1st lens...  
JP2001176109A
To provide a compatible optical pickup device utilizing a laser beam of two different wavelengths in a short wavelength band, a compatible optical pickup device capable of effectively correcting the occurrence of aberration owing to rapi...  
JP2001174712A
To reduce the cost by reducing the number of kinds of lenses to reduce the frequency for setting the condition of a lens working machine.The material and the shape of at least one of lenses in a front end illumination optical system of a...  
JP3201394B2
To provide an fθ lens for two-dimensionally scanning optical system for a printed board drilling work capable of realizing high fθ linearity over a wide two-dimensional scanning range, the telecentric characteristic, and the convergenc...  
JP2001166205A
To provide a compact projection lens which is composed of three groups; negative, positive and positive, is insertable with a color synthesis optical system but has an adequate back focus not longer than needed and telecentric characteri...  
JP2001507463A
(57) The spherical aberration of a summary optical beam 合焦 a beam, and is determined by dividing the section into at least two same mind zones (50, 51). The sub beam which passes through a zone is 合焦 (ed) on a focal detection sys...  
JP2001141995A
To provide an excellent optical projection lens system for photolithography. A first lens group G1 having a positive refracting power, a second lens group G2 which has a negative refracting power and consists of a waist 37 having a minim...  
JP3168424B2  
JP2001133684A
To obtain a photographic lens system which is composed of four lenses as a whole and has a high telecentric property and a high optical performance. This photographic lens system is composed of a first group, consisting of a meniscus len...  

Matches 801 - 850 out of 3,859