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Patent Searching and Data


Matches 801 - 850 out of 3,750

Document Document Title
JP2000509514A  
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  
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 ...  
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...  
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  
JP3038974B2  
JP3040187B2  
JP3037967B2  
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...  
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...  
JP3032909B2  
JP3032896B2  
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...  
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...  
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...  
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 ...  
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...  
JP3024134B2  
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...  
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...  
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...  
JP3007658B2  
JP3005905B2  
JP2000035533A
To improve assemblability by restraining the deterioration of optical performance caused by eccentricity and also to make compensation for the various kinds of aberration excellent in an image pickup lens constituted of two lenses. This ...  
JP2000028914A
To provide a photographing lens for an image pickup element which is provided with back focus where the various kinds of filter and a protection glass can be arranged and which uses a glass material whose processing is easy and inexpensi...  
JP3026241B2
PURPOSE: To compensate a large sagittal aberration generated by two surfaces provided across a stop, to widen the interval between a front and a rear group so as to arrange a lens shutter unit, and to prevent a sagittal comatic aberratio...  
JP2000028913A
To compensate chromatic aberration without increasing the constituting number of a lens by arranging a 1st lens having negative refractive power and a 2nd lens having positive refractive power in order from an object side and forming a g...  
JP3003081B2  
JP2000019394A
To obtain a compact projection lens whose back focus is long, whose whole length is short, which is provided with telecentric property and whose chromatic difference of magnification and distortion aberration are corrected. This projecti...  
JP2000019387A
To obtain an image-formation lens which can cope with wide use such as photographing, whose image surface is flat and where various aberrations are excellently corrected by constituting an image-formation lens of a 1st lens group having ...  
JP2000019392A
To provide a compact, lightweight and inexpensive photographing lens loaded in a camera for inputting an image and a camera for monitoring. This photographing lens is constituted of a 1st lens group 1 having negative refractive power, a ...  
JP3021127B2
PURPOSE: To obtain a retrofocus type lens which is long in back focus, is miniaturized and is excellent in various aberrations by constituting the most 1st conjugation side lens in the 2nd lens group of a convex meniscus positive lens to...  
JP2000009996A
To provide a compact projection optical system in which a good image formation performance is obtained even though color synthesis is conducted by mirrors. The system is provided with color synthesis mirrors M1 and M2, which conduct colo...  
JPH11352397A
To provide an optical system having excellent image-forming performance where chromatic aberration is corrected without increasing the number of component lenses by making a lens surface have a diffraction effect and to constitute an ima...  
JP2989725B2  
JPH11311740A
To obtain high resolution, to excellently compensate various aberrations over a wide wavelength range and to lower the manufacturing cost by setting the image read lens consisting of a modified Gaussian type lens consisting of six elemen...  
JP2971912B2  
JP2970083B2  

Matches 801 - 850 out of 3,750