Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 901 - 950 out of 3,789

Document Document Title
JPH11508700A
(57) The Cook triplet projection lens used for a summary overhead projector possesses the right element of the two outsides which consist of ophthalmic crown glass, and the negative element of one inner side which consists of light flint...  
JPH11194264A
To provide a monochromatic image observing optical system in which dust and dirt stuck to a monochromatic filter are inconspicuous on an image forming plane and a whole size and the size of image are made large compared with a general mo...  
JPH11190820A
To allow reading angle to be wider and to improve the quality of the read picture at a low cost by using a four lens constitution and satisfying special conditions. A first lens L1 is a positive meniscus lens having a convex face on an o...  
JPH11190817A
To provide a photographic lens constituted of two-group two lenses having a wide photographing viewing angle without causing the deterioration of various kinds of aberration and the reduction of field illuminance. The photographic lens 3...  
JP2917784B2  
JPH11183796A
To provide an image pickup optical system having the small fluctuation of aberration to a photographing distance by composing this system of four groups composed of a first and fourth groups of meniscus lenses having a positive and negat...  
JPH11183792A
To provide sufficient back focus and peripheral light quantity and to reduce coma flare, the curvature of field and chromatic aberration to obtain high image forming performance. This lens is constituted of 1st and 2nd lenses L1 and L2 h...  
JPH11174345A
To obtain a light and compact wide visual field ocular which is constituted of three groups having positive, negative and positive refractive indexes in order from an object side, where the 1st lens group is constituted of a positive men...  
JP2909765B2  
JPH11167061A
To provide a photographing optical system capable of improving chromatic aberration and obtaining high image quality, reduced in the number of composing lenses, small in size, light in weight, and low in cost. This photographing optical ...  
JPH11160615A
To provide a large-diameter lens obtained by excellently correcting spherical aberration and various aberration even in the case a large diameter lens with a F-number 1.2. This lens is constituted of a front-group lens having positive re...  
JP2595552Y2  
JP2895150B2  
JPH11133312A
To make an optical system have the function of a telescope to observe an infinite object and also the function of a microscope to enlarge and observe a minute object in a short distance by providing three lens groups and moving 1st and 2...  
JP2893046B2  
JPH11125767A
To obtain the small-sized, low-cost photographic lens system which has high performance, long back focus, and excellent telecentricity. This system is equipped with a 1st lens group 10 with negative refracting power, a stop S, and a 2nd ...  
JPH11119092A
To obtain an inner focusing optical system provided with vibration- proof where a still picture is obtained by optically correcting the blurring of a photographic image when the optical system is vibrated. This optical system is provided...  
JPH11120810A
To emit the illuminating light in the front direction in a central part and in the central part direction on the side surface side and avoid reduction in a luminance level on the side surface side through effective use of emitting light ...  
JPH11119091A
To accomplish an inexpensive variable power optical system with less transverse chromatic aberration by using a specified aspherical lens and an abnormality dispersing glass for a projection variable power optical system equipped with th...  
JP2887004B2  
JPH11109221A
To effectively compensate axial chromatic aberration in a low magnification lens and to attain high performance in a wide wavelength area by specifying a distance between lenses, the radius of curvature of a concave surface and balance b...  
JPH11109222A
To excellently compensate aberration by providing a 2nd diffraction surface arranged nearer to an image surface side than a 1st diffraction surface and having negative refractive power and constituting the respective diffraction surfaces...  
JPH11101938A
To provide a photographic lens which has relatively little fluctuation in aberration associated with change in magnification in a case of focusing according to ranges of an object, and is capable of providing an excellent focusing perfor...  
JPH11101937A
To easily cope with a change in the image pickup size, etc., of a video camera to be used by disposing a front group consisting of a convex lens group and a rear group consisting of a convex lens group in this order from a specimen side ...  
JP2881439B2  
JP2881744B2  
JP2881926B2  
JPH1195130A
To enlarge an apparent visual field and eye relief and to correct the original aberration of an eyepiece and the aberration of a pupil by forming an intermediate image in an optical path between a 1st and a 2nd lens groups by an objectiv...  
JPH1191825A
To avoid the phenomenon of a warpage of a flange part by a method wherein the surface layer and the intermediate layer of a lid body comprising the surface layer, the intermediate layer and a seal layer are made of a biaxially drawn poly...  
JP2879458B2  
JP11084230A
To provide a wide-angle lend small in size, light in weight, low in cost and also compensative in various aberrations with simple constitution such as four groups and five lenses. This lens is composed of four groups and five lenses, tha...  
JP11084229A
To obtain a single focus lens small in size, reduced in the number of lenses, low in cost and excellent in performance while securing sufficient back focus by using a diffraction optical element. This single focus lens is constituted of ...  
JP2873912B2  
JPH1177007A
To provide an anaerobic digestion method of organic waste in which impurities are separated and removed by a simple means without using a specific device. In the method for anaerobically digesting organic waste 1 containing hardly biodeg...  
JP2871021B2  
JP2867375B2  
JP11064727A
To compose a lens system of lenses having shape easy in machining, to restrain distortion aberration and chromatic aberration to the comparatively minimum and to obtain excellent optical performance by arranging a lens group having negat...  
JPH1151880A
To provide a moisture containing amount measuring unit capable of highly precisely measuring an amount of moisture containing in an inner lining refractory stuck on the surface of the iron plate of an iron melting vessel. With regard to ...  
JPH1152228A
To provide a wide angle lens and a super-wide angle lens for an electronic image camera e.g. a video camera and a digital still camera, specially a wide angle lens having a viewing angle of about 75° and a long back focal distance. This...  
JPH1155310A
To quickly and accurately retransmit an electronic mail by storing the received electronic mail and also the address of the mail originator and transmitting automatically an electronic mail to ask the mail originator to retransmit the st...  
JPH1152229A
To sufficiently secure back-focal distance and to excellently compensate magnification chromatic aberration and the curvature of field at the periphery part of an image plane by constituting the lens of a front group for diverging action...  
JP2860176B2  
JP2859418B2  
JP11044839A
To obtain a rear diaphragm type photographing lens having good optical performance over the entire image plane while realizing the miniaturization and the wide angle of an entire lens system. This lens is provided with a 1st lens L1 bein...  
JP11044801A
To provide a photographing lens capable of realizing the reduction of cost without deteriorating lens performance. This photographing lens 40 has positive refractive power and is positioned and held on the object side of a diaphragm aper...  
JPH1144007A
To simply, quickly and surely seal a joint between precast concrete floor boards at a low construction cost in comparison with a conventional method as a leakage countermeasure of the joint between precast concrete floor boards and to en...  
JPH1134412A
To provide a printing apparatus capable of well cooling a printed object to be printed even when the size of a cooling platen is not enlarged. A temp. sensor 38 as a detection means for detecting the temp. of a cooling platen 23 is provi...  
JPH1134420A
To dispense with ensuring of an excessive peripheral space for the replacement of a ribbon cartridge by effectively utilizing the upper space of a printer and to easily perform ribbon cartridge replacing work. A printer wherein a ribbon ...  
JPH1130118A
To improve fuel consumption of an engine by optimally controlling the reducing agent supplying amount and the timing so that the decrease of NOx may be performed at high efficiency. A device is provided with an NOx purifying catalyst 18,...  
JP11023959A
To obtain a compact photographing lens whose front lens diameter is small and which has high optical performance over an entire image plane. A positive meniscus 1st lens L1 whose convex surface is faced to an object, a negative 2nd lens ...  

Matches 901 - 950 out of 3,789