Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 851 - 900 out of 3,755

Document Document Title
JPH11295592A
To widen a viewing angle while securing required back focus though compact and inexpensive 2-lens constitution by adopting a lens on an object side of a retro-focus type whose surface on the object side is a convex surface and satisfying...  
JP2966080B2  
JPH11271604A
To reduce the degradation of image formation performance by atmospheric pressure change in the atmosphere and in vacuum and to perform use even in a change where the environment condition of an atmospheric pressure largely changes. At th...  
JPH11271606A
To reduce various aberrations, especially an image surface curve amount, to respective light beams from respective light sources in the case of performing multi-beam scanning by disposing a negative lens, negative and positive joined len...  
JP2958110B2  
JP2984956B2
PURPOSE: To make the back focus long and provide excellent aberration compensation by using a negative lens group as a 2nd lens group which is relatively close to an object and a meniscus lens which a concave a is directed to the object ...  
JPH11264930A
To constitute an optical system of one lens, to obtain a wide viewing angle ≥80°, and to realize sufficient optical performance as a camera for monitoring by constituting the optical system of a bivonvex lens and a plane glass in orde...  
JP2954217B2  
JPH11258500A
To provide an image reading lens which is excellent in chromatic aberration compensation and suitable for a color image reading lens by prescribing glass material according to partial variance ratio and Abbe number about the lens which i...  
JPH11249013A
To provide an image forming lens for image reading, which is lightweight and inexpensive and improves the quality of a formed image, by providing positive, positive, negative and positive configurations successively from the side of an o...  
JPH11237542A
To provide a lens almost at a diffraction limit at the F number of not only 1:22 but also 1:16 and 1:11 by forming a positive meniscus lens from the glass of a refractive index not more a specified value and an Abbe number larger than a ...  
JPH11231215A
To provide a lens system with which a high resolution can be provided while reducing a color aberration without expanding a device by providing the system with one set of lenses mutually bonding a front lens group arranged on the side of...  
JPH11223763A
To reduce the distortion and the chromatic aberration of magnification and to sufficiently secure the telecentric by using a positive lens as the lens nearest to the object in a rear group having a positive power and satisfying a specifi...  
JPH11223762A
To provide a telecentric objective lens in which a field angle can be widened, and full lens length can be shortened by adopting a retro-focus type. This objective lens is provided with a first group 103 consisting of a meniscus-shaped n...  
JP2925188B2  
JPH11508700A  
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...  
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...  
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...  
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 ...  
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...  
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 ...  
JP2887004B2  
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...  
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...  
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 ...  
JP2881926B2  
JP2881744B2  
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  
JPH1188813A
To provide an electronic camera capable of executing more efficient printing and saving power by recognizing a state of a camera driving power supply and limiting a printing function in accordance with the recognized state. The electroni...  
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...  
JPH1183613A
To enable grasping a physical sound source signal from mathematically independent signals, by rearranging singular values operated from a mutual spectrum matrix constituted of an input signal which is the nearest to a selected sound sour...  
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 ...  
JPH1183614A
To provide a marine acoustic tomography data analyzer which clarifies the signal peak and the time of a reference received wave signal data formed after accumulation, enables tracking each signal peak more accurately and simply, and can ...  
JP2873912B2  

Matches 851 - 900 out of 3,755