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Patent Searching and Data


Matches 801 - 850 out of 3,768

Document Document Title
JP2000266997A
To provide a photographing lens of two-group two sheet constitution excellent in production aptitude, having high brightness of an image plane, and having restrained fluctuation in various kinds of aberrations. This photographing lens 30...  
JP2000266996A
To enlarge the numeral aperture without increasing aberration and attain miniaturization by combining a specific refraction factor distribution lens with a single homogeneous plano-convex lens. A single refraction factor distribution len...  
JP2000258684A
To shorten the focal distance of an image pickup lens, also to secure the back focus distance thereof and to easily produce the lens. This lens is constituted of a 1st lens 1 consisting of a concave lens whose mark for the center radius ...  
JP2000258685A
To obtain an inner focus type photographing optical system where the fluctuation of aberration in the case of focusing is excellently compensated and which has excellent optical performance all over the object distance. This photographin...  
JP2000249912A
To lighten the load of a focusing action and to reduce the deterioration of resolution caused by the fluctuation of an original by making the curvature of the field small and making depth large as an image forming lens constituted of fiv...  
JP2000249914A
To obtain a lens for reading an image whose angle of view is wide, whose cost is low and by which the excellent quality of a read image is obtained and which is bright by constituting the lens of four lenses, making one surface of at lea...  
JP2000249916A
To lighten the load on a focusing action and to reduce the deterioration of resolution caused by the fluctuation of an original by making the curvature of the field small and making depth large as an image forming lens constituted of fou...  
JP3085787B2  
JP2000231056A
To provide a photographing lens capable of focusing to an object distance in a wide range from an infinity object to a short distance object. This photographing lens is provided with a 1st lens group L1 having positive refractive power, ...  
JP3079497B2  
JP3077811B2  
JP2000227547A
To provide a photographic lens of a 2 groups 2 lenses construction where illuminance of the image surface is bright and variation in various aberrations can be kept down without narrowing the angle of the photographic image. In this phot...  
JP2000227546A
To obtain an inner focus type middle telephotographic lens where aberration is completely compensated and which is constituted of small number of lenses by constituting the lens of a 1st positive lens group, a 2nd negative lens group and...  
JP3076098B2  
JP3073786B2  
JP3072533B2  
JP2000509514A  
JP2000509515A  
JP3069437B2  
JP2000193884A
To provide a compact photographing lens system having a good optical performance by providing in order from the object side a negative first lens, a both side projecting second lens, a diaphragm, a positive third lens, a negative fourth ...  
JP2000193894A
To provide an illuminating optical system for an endoscope, capable of leading luminous light extending over the wide range of the visual field in a small size by constituting at least one or more faces except the nearest face on the obj...  
JP3060327B2  
JP2000180719A
To provide an extremely compact photographic lens system having high optical performance.This system is provided with a front group F, a diaphragm A and a positive rear group R, and the rear group R is constituted of three lenses, a nega...  
JP2000180715A
To obtain a photographic optical system for effectively preventing the occurrence of ghosts, when the photographic optical system is mounted on the front side of a photographic lens by optimally setting the curvature on the object side a...  
JP2000180721A
To obtain an image pickup lens which is satisfactory in image formation performance and reduced in cost with simple constitution.This image pickup lens L is a biconvex single lens having a diaphragm S on an image I side, and either of a ...  
JP2000171697A
To obtain a photographing lens capable of restraining aberration fluctuation at the time of focusing to be small and obtaining excellent image quality in a wide photographing distance range from long-distance photographing to short-dista...  
JP2000171701A
To obtain a high-performance deformable gauss type lens suitable as a comparatively telephoto lens mounted on a camera for monitoring and satisfying a condition that an f-value is about 1.8 and the ratio of a focal distance to image size...  
JP2000147374A
To obtain a high numerical aperture objective lens whose numerical aperture is large and which is provided with excellent performance though it can be comparatively easily manufactured and it is inexpensive by providing a first and a sec...  
JP3041939B2  
JP3040187B2  
JP3038974B2  
JP3037967B2  
JP2000111795A
To provide a lens having excellent image-forming performance over such a wide viewing angle that the maximum half viewing angle is about 23° and having compact and simple constitution by making it satisfy a specified conditional express...  
JP2000111802A
To provide an observation optical system and an observation device using the same capable of observing an excellent object image by correcting image blur caused by hand shake in binoculars and a telescope.In this observation optical syst...  
JP2000111794A
To provide a lens whose effective f-number is 3.5 and whose maximum half viewing angle is about 16° and which has high optical performance over an entire image plane by making it satisfy a specified conditional expression.This lens is c...  
JP3032896B2  
JP3032909B2  
JP2000105334A
To improve chromatic difference of magnification and other aberration even in the case of applying a lens to a CCD image pickup element whose number of pixels is large while securing compact constitution such as five lenses by setting sp...  
JP2000098224A
To obtain a lens having the angle of view of about 50° with simple constitution and having complete optical performance in practical use as a camera to be used for monitoring by constituting the lens so that a surface nearest to an imag...  
JP2000098221A
To obtain an achromatic lens system which does not use a fluorite being a lens system which excellently compensates chromatic aberration by near infrared rays especially by constituting the lens system of a negative single lens, a positi...  
JP3027863B2  
JP2000089105A
To obtain an objective optical system having visual field conversion optical elements of a small size and high performance with a smaller number of lens elements by forming the faces on the image side of third lenses which are relatively...  
JP2000089107A
To obtain an image reading lens capable of satisfactorily correcting both of magnification chromatic aberration and the curvature of an image field, irrespective of a simple constitution, two-group two-lens as the most simple constitutio...  
JP3049524B2
PURPOSE: To provide an objective optical system for oblique endoscope, easy to fabricate, and an assembly of the endoscope tip which holds this objective optical system by locating the optical axis of one group of lenses in eccentricity ...  
JP3024134B2  
JP2000081569A
To improve optical characteristics such as chromatic aberration, etc. This device 1A is composed of five groups comprising a 1st lens group 2 for correcting spherical aberration in the middle image height and comatic aberration of underl...  
JP3044588B2
PURPOSE: To provide an objective lens in which influence of a long beam of light, unnecessary for observation, upon the picture image is removed by configuring the objective lens with an image forming system and a relay lens system. CONS...  
JP3045634B2
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...  
JP2000066091A
To provide an image pickup lens which accomplishes an F-number of 2.8 and an viewing angle of 40° despite of few number of lens configuration, and has a long back focal length required for an electronic pickup element and excellent tele...  
JP2000066090A
To obtain sufficient exposure for a subject having low luminance at low cost by making the open F-number of a photographing lens satisfy a specified condition. This photographing lens is constituted of two lens components and a diaphragm...  

Matches 801 - 850 out of 3,768