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JP07270681 |
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...
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JP07261126 |
PURPOSE: To provide a short distance correction lens which is equipped with the vibrationproof function, small-sized and high in performance, and suitable for photographs, videos, etc. CONSTITUTION: The short distance correction lens equ...
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JP07253538 |
PURPOSE: To apply the system to a photographic optical system using two and more solid-state image pickup elements, to lengthen a back focal length, to reduce the angle of off-axis principal ray, to make the system high performance and t...
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JP07253537 |
PURPOSE: To apply the system to a photographic optical system using plural solid-state image pickup elements, to lengthen a back focal length and to reduce the angle of off-axis principal ray by comprising a condenser lens group having a...
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JP07253533 |
PURPOSE: To provide a compact objective lens of inner focus type having excel lent image forming performance at the time of focusing at a near distance. CONSTITUTION: An objective lens of inner focus type is provided, in order from the o...
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JP07253536 |
PURPOSE: To provide the excellent quality of picture whose aberrations including distortion aberration and the curvature of field are compensated while ensuring a working space for wiping out dust stuck to a monitor due to static electri...
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JP07253532 |
PURPOSE: To remove off-axis aberrations of a light, beam containing many kinds of aberration by providing a light shield film for reducing off-axis aberrations that an off-axis light beam around a main light beam emitted from one point o...
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JP07239439 |
PURPOSE: To obtain a lens for reading an original which can be made compact because the constituting number of lenses is small and which is constituted so that a wide viewing angle or high performance can be easily realized by using a gr...
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JP07239440 |
PURPOSE: To provide a magnifying lens capable of increasing an magnification of a microscope having a high performance with simple and compact optical constitution by arranging plural lens groups into the convergent luminous flux formed ...
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JP07234357 |
PURPOSE: To obtain the loupe which has about ×4.5 power and also has various aberrations compensated excellently and is inexpensive by making the radii of curvature of three positive lenses common. CONSTITUTION: This loupe consists of a...
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JP07230034 |
PURPOSE: To obtain the image re-formation optical system which has superior optical performance although the overall length is short and the constitution is relatively simple by providing a front and a rear group which are composed of 1s...
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JP07218976 |
PURPOSE: To exactly decide the effective diameter of an optical system by deciding the effective diameter based on object information in an extreme state to be handled by that optical system. CONSTITUTION: The main part of an effective d...
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JP07209578 |
PURPOSE: To easily and effectively cut off ghost light without increasing the cost by providing a stop which is rectangular or in a similar shape behind a meniscus lens. CONSTITUTION: A 1st lens L1 is a convex meniscus lens which is conv...
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JP07192504 |
PURPOSE: To provide a projector-type headlight which can be switched from a luminous intensity distribution pattern state suitable for driving in a common road to a luminous intensity distribution pattern state suitable for driving on hi...
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JP07181390 |
PURPOSE: To provide a compact macro-lens having a relatively small delivering quantity in focusing, and capable of performing a high power photographing having a photographing distance to some degree. CONSTITUTION: This lens is formed of...
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JP07181386 |
PURPOSE: To provide a small-sized, lightweight, and high performance zoom lens using refractive index distribution type lens having a refractive index change in the optical axial direction. CONSTITUTION: This zoom lens has, in order from...
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JP07181380 |
PURPOSE: To improve a conventional optical system for front diaphragm and provide a lens system substantially having zero distortion aberration, and sufficiently ensuring the back focus. CONSTITUTION: A lens system for front diaphragm is...
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JP07181385 |
PURPOSE: To provide a small-sized, lightweight, and high performance zoom lens using a refractive index distribution type lens having a refractive index change in the optical axial direction. CONSTITUTION: This zoom lens has, in order fr...
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JP07181373 |
PURPOSE: To provide a gauss type photographic lens in which spherical aberration and sagital coma are satisfactorily corrected with a little lens number. CONSTITUTION: In a gauss type photographic lens having a front group GF of positive...
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JP07181378 |
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...
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JP07174964 |
PURPOSE: To obtain a compact image-forming lens constituted of a small number of component lenses, easily to be made to have a larger aperture, and having excellent performance by constituting the lens of two groups of two lenses being p...
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JP07168093 |
PURPOSE: To realize an imaging lens that is long in back focus, able to reduce an incident angle of an incident beam of light into a solid camera element, bright and wide in a field angle, in addition to being possible for miniaturizatio...
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JP07168095 |
PURPOSE: To secure a small lens system, being high performance at a wide field angle and bright, with a triplet lens of 3-group/three sheet constitution, by forming at least one surface of both second and third lenses into aspheric surfa...
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JP07168092 |
PURPOSE: To realize an imaging lens by means of two lenses, which is long in a back focus, able to take a field angle relatively wider, bright and compact in size, in addition to making cost-down promotable by regulating the extent of va...
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JP07159697 |
PURPOSE: To provide a microscopic objective lens which is as bright as ≥0.2 in NA, is as small in the number of lens elements as about three elements and is capable of well correcting aberrations by having one element of specific radia...
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JP07146435 |
PURPOSE: To provide a radial direction refractive index distribution type optical relay for excessively correcting a color aberration in an axial direction and the manufacturing method. CONSTITUTION: This relay 35 is provided with at lea...
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JP07146436 |
PURPOSE: To remove effectively flare light in a light emitting wave length of an LED, and reduce crosstalk when it is arrayed by arranging a dye layer on a side surface so as to absorb light having a specific wave length. CONSTITUTION: I...
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JP07140387 |
PURPOSE: To make the dust and foreign matter in the finder hardly visible while having a variable power ratio by moving a second lens group to change magnification and satisfying specific conditions. CONSTITUTION: This finder has an obje...
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JP07140385 |
PURPOSE: To provide the projection optical system which decreases image distortions, is compact and has a high numerical aperture by consisting this optical system of a first lens group having a positive refracting power, a second lens g...
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JP07128571 |
PURPOSE: To reduce blur quantity by a small quantity of rotating operation of a focus ring when zooming is performed to a telephotograph side after focus adjustment is performed at the wide-angle end by making a control circuit have a fu...
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JP07120671 |
PURPOSE: To provide a small-sized wide angle lens having the number of lens of as few as five, minimized in the change of lens performance by temperature change, and having a large aperture and a wide field angle such as F2.8 and about 7...
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JP07120672 |
PURPOSE: To downsize a lens system including the outer diameter, and enhance the optical performance up to a screen peripheral part by setting the lens first face and lens final face into concave faces, and satisfying a specified conditi...
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JP07104183 |
PURPOSE: To obtain the Triplet lens having a high performance and a telephoto ratio of about 1.05, and a wide view angle, and being bright and small in size. CONSTITUTION: This lens is constituted of a first lens L1 having a meniscus sha...
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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...
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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 ...
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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...
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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...
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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...
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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...
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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 ...
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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...
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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...
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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 ...
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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...
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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...
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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...
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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 ...
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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...
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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...
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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...
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