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Patent Searching and Data


Matches 1,001 - 1,050 out of 3,750

Document Document Title
JP2714685B2  
JP2714686B2  
JPH1039207A
To drastically reduce the cost, to make the back focus satisfactorily long even in a small-sized lens system, also, to make an image forming lens bright and to make the viewing angle wider, by arranging a 1st negative lens, a 2nd positiv...  
JPH1039236A
To make it possible to cover the shortest observation distance without requiring a close-up lens by providing a telescopic optical system which has, successively from an object side, an objective optical system having a stationary first ...  
JPH1039205A
To obtain a bright scanning lens having a small number of component lenses, capable of making excellent compensation for various aberration, whose F value is reduced, by providing a 1st lens whose refractive power is negative, a 2nd lens...  
JPH1039206A
To make an image forming lens small, have a viewing angle larger than 150°, a bright Fno of 1.8 or smaller, a sufficiently long back focal length and good resolving power while composing it of five lenses. First-five lenses L1-L5 have n...  
JP2712370B2  
JP2711128B2  
JP2710955B2  
JP2711127B2  
JP2707789B2  
JP2709460B2  
JP2706789B2  
JP2706946B2  
JPH1020187A
To provide an optical device capable of sufficiently enjoying the change of an optical image. This device is provided with a lens L1 composed of a meniscus lens having a positive power, a lens L2 composed of a positive power lens and a d...  
JP2699977B2  
JP2700003B2  
JP2696797B2  
JP2697822B2  
JP2697119B2  
JPH103033A
To satisfactorily correct spherical aberration of a luminous flux of which numerical aperture exceeds 1 by providing an immersion system objective lens with a front group of an approximately afocal system and a rear group having a positi...  
JPH09329766A
To display a stable low pass effect and the obtain a satisfactory picture by forming a prescribed continuous shape and refractive index distribution in a radial direction by setting up the enter of an incident luminous flux as an origin ...  
JPH09329740A
To obtain a long focal distance, comparatively long back focus, high level color correction, low distortion, and obtusity to a temperature change by arranging lens parts in the order of low dispersion, low dispersion, high dispersion, an...  
JPH09329739A
To provide an optical system reducing the number of constitutional lenses, considering the difficulty and cost of manufacturing of a low material and capable of attaining sufficiently enough performance and miniaturization by the use of ...  
JP2692996B2  
JP2690765B2  
JPH09325264A
To locate an exit pupil at almost infinity and to shorten a total length by providing a lens having a positive refractive power provided in the vicinity of an image plane between a main optical system and a solid-state image pickup eleme...  
JPH09318872A
To correct shake without changing a focal distance in an a focal state even in the same inserting a lens between light beam by opposing a planoconave lens to a planoconvex lens through a small cavity and specifying relation between the r...  
JP2683895B2  
JPH09304695A
To obtain a compact and bright image-formation lens securing a long back focus and a wide field angle and realizing the reduction of cost in the case of mass production by making the lens a retrofocus type lens constituted of two concave...  
JP2683463B2  
JP2679130B2  
JP2679017B2  
JP2677711B2  
JP2676000B2  
JPH09292565A
To make the angle of view wide, to make the lens bright, to insert various optical members such as a low-pass filter, etc., between a lens system and an image pickup element, to attain long back focus and to obtain high optical performan...  
JPH09292566A
To make the angle of view wide, to make the lens bright, to insert various optical members such as a low-pass filter, etc., between a lens system and an image pickup element and to obtain high optical performance by specifying the ratio ...  
JPH09288235A
To provide an image forming lens having a high image filed illuminance even in the case of using in an unmagnified state, and also capable of suppressing the fluctuation of various kinds of aberration. The image forming lens 16 is consti...  
JPH09281388A
To set the number of lenses to about 2 to 4 and to excellently compensate aberration by providing a radial type refractive index distribution lens having axially symmetric refractive index distribution in a radial direction in a rear gro...  
JP2665274B2  
JPH09265037A
To smoothly and easily perform driving control corresponding to a zoom lens where not only a movable lens group for focusing but also a movable lens group for variable power are moved in the case of focusing by providing a movable lens g...  
JPH09258098A
To obtain very satisfactory optical performance from infinity to a close range in a photographing range in spite of having a large aperture, to make the constitution compact and simple, and to reduce the cost by satisfying a specified co...  
JPH09258100A
To obtain a lens system, lens working of which is simple and inexpensive even when the image plane size is small, which is comparatively bright, and where aberration compensation is excellently performed, by constituting the system of fo...  
JP2659101B2  
JPH09243936A
To provide a finder optical system for a single-lens reflex camera with excellent visibility by excellently correcting distortion aberration with a simple constitution. This system is the finder optical system for observing a subject ima...  
JP2652637B2  
JP2652662B2  
JPH09236745A
To obtain a stable beam radius and a constant speed characteristic over the entire region of the surface to be scanned by specifying the constitution of the lenses having a meniscus shaped first lens and a second lens having a positive p...  
JP2650309B2  
JP2646350B2  

Matches 1,001 - 1,050 out of 3,750