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Patent Searching and Data


Matches 901 - 950 out of 1,947

Document Document Title
JP07104185
PURPOSE: To obtain the image forming lens for reading an image, which is short in overall length of the lens system, miniature and inexpensive and satisfactory in the quality of a formed image by providing a first and a fourth biconvex l...  
JP07104179
PURPOSE: To obtain the Tessar lens whose view angle is such a wide view angle as about 60-65 degrees, and which is bright by an F-number of about 2.8, is small in size and has high performance. CONSTITUTION: This Tessar lens consists of ...  
JP07104184
PURPOSE: To provide the photographic lens whose performance is not deteriorated, even if its aperture is enlarged by a small number of lens pieces to the utmost. CONSTITUTION: In the photographic lens in which a meniscus concave lens 1 w...  
JP07098432
PURPOSE: To reduce the cost of lens forming materials, to form 'lens shapes to facilitate operations to produce lenses and to reduce the cost of production by constituting the lens of four-element constitution arranged symmetrically with...  
JP07092384
PURPOSE: To prevent the occurrence of errors and mistakes on a numerical calculation and to improve efficiency in calculating, in an optimizing calculation used for an optical system(lens) design. CONSTITUTION: This method is a descendin...  
JP07093292
PURPOSE: To efficiently perform optimizing arithmetic at all times by deciding the suitability of an applied parameter difference and resetting the amount at any suitable value when it is not suitable. CONSTITUTION: Data to be the target...  
JP07093293
PURPOSE: To efficiently perform optimizing arithmetic at all times by deciding the suitability of an applied variable difference and resetting the amount at any suitable value when it is not suitable. CONSTITUTION: Data to be the target ...  
JP07093291
PURPOSE: To improve the efficiency of processing by setting an initial value for efficiently searching an optimum solution with the small number of times of repetition. CONSTITUTION: Data to be the target of evaluation are inputted (S201...  
JP07092398
PURPOSE: To attain the improvement of the depth of field and the control of brightness corresponding to the characteristic of an endoscope by arranging a variable diaphragm in an optical system. CONSTITUTION: This device is used while in...  
JP07084182
PURPOSE: To make the lens compact by reducing the diameter and the total length of the lens while keeping bright and excellent performance by incorporating a meniscus lens and bi-concave lens between two positive lenses. CONSTITUTION: A ...  
JP07072320
PURPOSE: To provide a ring pattern exposure device and method for plotting a highly minute ring pattern having the distribution of arbitrary ring width. CONSTITUTION: A photosensitive material is formed on the remaining part of a substra...  
JP07072319
PURPOSE: To provide a manufacture method for easily obtaining a transmission grating element whose refraction efficiency is high. CONSTITUTION: One stage is formed on the surface of a substrate by an exposure deposition process for formi...  
JP07072381
PURPOSE: To excellently observe a finder image while making eye relief long without decreasing finder magnifications by specifying respective elements such as the radius of curvature of a lens, the length on the optical axis, and the foc...  
JP07072429
PURPOSE: To provide the optical system of high performance with less decline of optical performance accompanying assembly errors by making light be incident on one lens element through the area of a transmission grating element provided ...  
JP07072383
PURPOSE: To provide the endoscope objective lense which can has its power chromatic aberration compensated excellently without greatly altering the lens constitution, namely, while holding compactness. CONSTITUTION: The endoscope objecti...  
JP07056083
PURPOSE: To provide an optical lens which can correct imaging system characteristics such as field curvature and spherical aberration. CONSTITUTION: This optical lens is constituted of a simple optical element, and additional magnificati...  
JP07049449
PURPOSE: To provide a reverse Galilean finder in which the distance from the final lens surface of an ocular to an eye point is extended, and a satisfactory finder image can be observed without vignetting even in water by properly consti...  
JP07035973
PURPOSE: To obtain a wide angle lens with wide angle of field, small open F-number, simple constitution, and by which aberration up to the periphery of a screen can be corrected satisfactorily by employing four-group lens consitution and...  
JP07035972
PURPOSE: To obtain a triplet lens which maintains sufficient ambient light quantity and by which various kinds of aberration can be corrected satisfactorily and provided with a viewing angle ≥65° by employing triplet lens component co...  
JP07013070
PURPOSE: To increase the degree of freedom of the designing of the optical system with the negative lens and to reduce the manufacture cost at the same time. CONSTITUTION: An optical system which uses an area other than the optical axis ...  
JP07013071
PURPOSE: To obtain a lens system of small-sized constitution which has excellent optical performance by composing the system of 1st - 3rd lenses and a stop and satisfying specific conditions. CONSTITUTION: The lens consists of the 1st le...  
JP07005354
PURPOSE: To simplify the constitution of a lens barrel and to unnecessitate a spacing ring having a compricated shape by equalizing the maximum lens diameters of all lens groups to be the same and positioning each lens group by mechanica...  
JP07005358
PURPOSE: To provide a miniaturized and light weight reading optical system by using a single lens by composing the system of the respectively specified diaphragms and a positive meniscus lens whose concave surface confronts the side of t...  
JP06347694
PURPOSE: To provide a retro-focus type large aperture lens composed of six lenses and capable of improving various aberrations even with a F number of about 1.2 and a back focus longer than 1.1f by making a third lens a meniscus lens who...  
JP06347695
PURPOSE: To realize high projecting magnification, to simultaneously compensate higher order distortion aberrations and chromatic aberration and to obtain excellent image forming performance by comprising plural lens groups and satisfyin...  
JP06337348
PURPOSE: To well correct various aberrations and more particularly chromatic aberrations and to obtain optical performance high over the entire part of object distances by adequately setting the lens constitution and glass materials of r...  
JP06337347
PURPOSE: To correct the axial chromatic aberration and magnification chromatic aberration generated in a lens system having a uniform refractive index by combining radial GRIN rod lenses having a refractive index distribution in the radi...  
JP06331887
PURPOSE: To provide a compound lens by which the pattern of a diffraction grating can be accurately transferred, whose inside refractive index does not become uneven because of environmental change, which has stable lens performance and ...  
JP06317743
PURPOSE: To facilitate the manufacture and to suppress the restriction on the design of an image forming lens system to minimum by compensating the aberrations comprised in the image forming lens system by means of a specified aberration...  
JP06308383
PURPOSE: To enable underwater photography with high image formation performance over a wide range from an infinite distance to a short distance corresponding to unmagnification by employing a system of two-group constitution of a front g...  
JP06308384
PURPOSE: To provide the lens which has an about 60° field angle and luminance of F number 2 by composing the lens of a positive meniscus lens which is convex to the object side, a biconcave lens, a biconvex lens, and a negative meniscus...  
JP06308381
PURPOSE: To provide the wide-angle endoscope objective which is short in overall length and small in external diameter and has its distortion aberration compensated excellently by composing the endoscope objective of a front and a rear g...  
JP06308386
PURPOSE: To provide the large-diameter macrolens which have aberrations compensated excellently from an infinite distance to a short distance corresponding to unmagnification by composing the lens of a front group which has at least one ...  
JP06300988
PURPOSE: To obtain a collimator lens which has a chromatic aberration of a secondary spectrum, etc., compensated and also has high optical performance. CONSTITUTION: The collimator lens is composed of three lenses in total including at l...  
JP06297595
PURPOSE: To form refractive index distribution in a planar direction by fixing the photosensitive refractive index control agent in a transparent base material by irradiating the base material with laser beam having intensity distributio...  
JP06289327
PURPOSE: To reduce the thickness of the spectacle lens and improve the fashionability by combining lenses which are different in refractive index and also different in unevenness. CONSTITUTION: More than two kind of lenses which differ i...  
JP06290932
PURPOSE: To lessen a unit in size by a method wherein a yoke forming a magnetic circuit is formed in one piece together with the base plate of a unit possessed of a magnetic circuit, or a part of the base plate is made to serve as the yo...  
JP06273822
PURPOSE: To eliminate the need of replacing a driving part even in the case a lens barrel is replaced by separably integrating a substrate for assembling a magnet rotor and an electromagnet coil in a circular-arculate shape and a base pl...  
JP06273666
PURPOSE: To provide the lens for projector lamp which has a satisfactory optical performance and has FNO≤1 to be bright and is superior in productivity and is produced at a low cost and is light-weight. CONSTITUTION: This lens has a co...  
JP06265784
PURPOSE: To provide an image-forming element easy to manufacture as compared with a rod lens array. CONSTITUTION: This image-forming element is comprised by arranging plural transparent members 3 provided with both distribution in which ...  
JP06265781
PURPOSE: To obtain a wide angle photographic lens of wide angle of view with small distance between a first surface and a final surface, high performance, and large aperture of F/2.8 class by constituting a lens system of a front group w...  
JP06265780
PURPOSE: To obtain a wide angle photographic lens with small distance between a first surface and a final surface. high performance, and large aperture of F/2.8 class by constituting both a front group of at least two positive lenses and...  
JP06258574
PURPOSE: To provide a photographic lens which is excellently assembled in the main body part of a film unit or a camera and small in spherical aberration and has high performance from the periphery to the center in spite of an asymmetric...  
JP06242369
PURPOSE: To provide an amphibian lens system capable of obtaining effective description performance in both of air and water only by arranging two lenses in the front of a lens system whose aberration is effectively corrected in air. CON...  
JP06242370
PURPOSE: To obtain a compact and large aperture photographing lens whose various abberations are effectively corrected by arranging the 1st to 7th lenses and satisfying specific conditions. CONSTITUTION: The 1st meniscus-shape lens havin...  
JP06235858
PURPOSE: To obtain a high performance photographic lens suitable to a lens shutter camera with less performance deterioration to the peripheral part of a film plane though the lens is simply constituted. CONSTITUTION: As to a lens system...  
JP06235857
PURPOSE: To maintain a sufficient peripheral light quantity, to satisfactorily correct astigmatism, and to attain a wide field angle by fulfilling a specific condition by each lens component. CONSTITUTION: This device is constituted of t...  
JP06230283
PURPOSE: To obtain a zoom lens having a small number of lenses, the excellent performance and well corrected aberration by providing at least one gradient refractive index lens having the gradient of refractive index in the direction of ...  
JP06230273
PURPOSE: To provide a radial type gradient refractive index lens whose Petzval's sum and a chromatic aberration are excellently compensated by comprising a refractive index distribution in the radial direction from an optical axis and sa...  
JP06222260
PURPOSE: To provide a compact photographic lens with large aperture which is excellent in drawing property by specifying the space on the optical axis between the first lens from a subject side and the second lens, the core thickness of ...  

Matches 901 - 950 out of 1,947