Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 1,051 - 1,100 out of 3,731

Document Document Title
JP2607957B2  
JPH09113964A
To provide the large-diameter photographic lens system which has high performance and large contrast by using a lens material which has a high refractive index, and compensating a spherical aberration and a chromatic aberration while sho...  
JP2637317B2
PURPOSE: To obtain the compact projection lens which is used for a projection type TV and has a plastic lens shaped to have a small asphericity quantity and no inflection point and also has superior machinability and image forming perfor...  
JP2629095B2
PURPOSE: To obtain the projection lens which has a plastic lens having a small sphericity quantity and no inflection point and can project an image of high- quality television with high picture quality. CONSTITUTION: The projection lens ...  
JP2629592B2
PURPOSE: To ensure a long back focus, compared with the focal length, and project a projected image which is satisfactorily aberration-corrected over the whole area of a projecting screen even when the F number is minimized. CONSTITUTION...  
JP2601802B2  
JPH09101452A
To obtain a read lens which is inexpensive and improves the quality of read image while excellently compensating various aberrations and making the lens system compact and wide in field angle by using four lenses which meet specific cond...  
JPH09101451A
To obtain an ultraviolet wide-angle lens which has a small F number and a wide field angle and secures a space where plural ND filters, polarizing filters, etc., that are put in and out are arranged between lenses and is excellent in ima...  
JP2597510B2  
JP2597513B2  
JPH0990213A
To lower the price and secure sufficient performance although the lens system consists of five elements. The photographic lens consists 5-element constitution formed of a concave lens 1 made of glass, a lens 2 made of plastic, a convex l...  
JPH0992601A
To ensure high overlay accuracy even when a projection aligner having a remaining asymmetric random image distortion is used mixedly. A transparent correction plate 8 is interposed between a reticle R and a projection optical system PL. ...  
JPH0990214A
To provide an image forming lens which is light and has a wide field angle and also various aberrations, specially, a chromatic aberration and an image plane excellently corrected by arranging a 1st lens group of ≥3-lens constitution, ...  
JPH0990219A
To obtain a projection lens which suitably obtain video of high picture quality as a projection lens used for a projector device which enlarges and projects video from a cathode-ray tube on a large-sized screen. This projection lens cons...  
JP2596801B2  
JP2596800B2  
JP2596810B2  
JPH0980304A
To provide an objective lens with a wide field angle which consists of about two lenses, has a ≥80° angle, and also has various aberrations compensated excellently by composing the lens of a negative 1st lens and a positive 2nd lens a...  
JP2594450B2  
JP2591755B2  
JPH0968646A
To make it possible to suppress the occurrence of the color differences of spherical aberrations and the occurrence of chromatic aberrations over a wide wavelength range from a near IV region to a near IF region without increasing the nu...  
JPH0961707A
To provide a standard lens system for photographing lens and electronic video apparatus having high depiction performance by improving sagittal comatic aberrations and curvature of field to meet a trend toward a larger aperture diameter....  
JPH0961708A
To provide a standard lens system which is a lens system to be used for general photographing lenses and optical systems for electronic video apparatus using the entire part of a visible region, is improved in the sagittal comatic aberra...  
JPH0961713A
To provide a reading lens of a low cost which is well corrected in various aberrations and has a high contrast in a high space frequency region by well correcting the fluctuation in the focal length at the time of a temp. change by the u...  
JPH0961706A
To well correct various aberrations including chromatic aberrations and to make a lens system compact by including a distributed refractive index lens having such distribution where dispersion increases offaxially into an optical system....  
JP2588505B2  
JPH0954245A
To provide an image pickup device having small aberration without depending on the setting of a focal distance. This device is composed of a first lens group 1 composed of plural lenses located in front of a diaphragm 6 and movable in th...  
JPH0954248A
To suppress the generation of astigmatic aberration and distortion aberration, to excellently compensate spherical aberration and making a lens a wide angle by composing the lens of two-group three-lenses and satisfying a specified condi...  
JP2582144B2  
JP2582446B2  
JPH0949966A
To provide a graded index type signal lens composed of one lens and having high performance at a low cost by making the lens has a constitution having a specified distribution of refractive index and satisfying a specified condition. Thi...  
JPH0943508A
To provide a bright hybrid lens of low cost having a high resolution. This lens comprises, in order from the object side, a first positive lens group 1 composed of a biconvex lens whose convex surface confronts the object surface and mad...  
JPH0943512A
To provide a photographic lens composed of six lenses as a whole, having a long back focal length and high optical performance as a whole screen. This lens is composed, in order from the object side, of a first negative meniscus lens G1 ...  
JP2581279B2  
JP2580103B2  
JPH0933800A
To provide the read lens which has excellent performance and is inexpensive. The read lens is constituted by arranging 1st-6th groups in order from an object side to an image side and has 6-group, 7-element constitution of the 1st group ...  
JPH0933803A
To provide an image forming lens which is bright and wide in field angle and can have various aberrations compensated by arranging a 1st lens group of positive, negative, negative, and positive four-element constitution and a 2nd lens gr...  
JP2578481B2  
JPH0915669A
To provide an inexpensive underwater camera equipped with a vibration-proof function capable of correcting the positional deviation of an image caused by the shake of the camera. This camera is equipped with an attachment part 10 freely ...  
JPH0915667A
To provide a front converter equipped with a vibration-proof function attached to the object side of an underwater camera, for example, having a wide angle function and capable of correcting the positional fluctuation of an image caused ...  
JPH0915492A
PURPOSE: To excellently compensate various aberrations and to provide the brightness compared with a conventional wide-angle lens while suppressing a cost required for molding the lenses as little as possible by composing the wide-angle ...  
JPH095650A
PURPOSE: To obtain a processing method adequate for paraxial calculation of an optical system for calculating the paraxial quantity developed around the reference axis of the optical system including a curved surface (off-axial curved su...  
JPH095805A
PURPOSE: To provide a condenser lens which eliminates the need for high accuracy for optical axis alignment without increasing the number of parts and contributes to the simplification and miniaturization of device constitution by imagin...  
JPH095622A
PURPOSE: To provide an inverted image lens which is well corrected of various aberrations and more particularly curvature of field, astigmatism, etc., as an observation optical system without degrading spherical aberrations, etc., as an ...  
JP2569302B2  
JPH08338944A
To manufacture an improved two-member or two-element lens system having a curved image surface by providing an optical system having the total angular field of view of the specific angle or above and a curved image practically correspond...  
JPH08334685A
PURPOSE: To realize an image whose back focus is long, which is compact and is bright up to a periphery and where high image quality is obtained over an entire screen. CONSTITUTION: As for a projecting lens provided with a main lens and ...  
JPH08334684A
PURPOSE: To make an optical system compact, to improve an assembling characteristic, to reduce a cost and to enhance imaging performance by adopting prefixed diaphragm two-element lens constitution and specifying the conditions for const...  
JP2563175B2  
JP2562636B2  

Matches 1,051 - 1,100 out of 3,731