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Matches 801 - 850 out of 3,848

Document Document Title
JP3264978B2
PURPOSE: To make a bright, high-performance lens system possible with a small number of lenses by causing a first lens, which is a radial heterogeneous lens having positive refractive power, to meet specific conditions. CONSTITUTION: A f...  
JP2001350088A
To provide an inexpensive reading lens which has brightness by which higher speed reading is attained than a conventional original reader and will not contain lead arsenic, which are harmful to an environment at all.The lens 1 of positiv...  
JP2001350087A
To improve focusing accuracy.This device possesses an image pickup means 29, focus detecting means 22 and 23 to detect the focal position of a lens 1 attached, a luminous flux splitting means 28 to split luminous flux from the lens into ...  
JP2001337268A
To provide a wide-angle lens small in size, light in weight, capable of being produced at low cost and having a long exit pupil.This lens is provided with a 1st lens, a 2nd lens and a 3rd lens arranged in order from an object side, and a...  
JP3255490B2
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...  
JP3254165B2
To obtain high reading density in the vicinity of image formation magnification 0.16535, to reduce cost and to obtain the sufficient angle of view and sufficient brightness by arranging 1st group to 4th group which are positive, negative...  
JP2001324675A
To provide a retrofocus type lens having long back focal length with reference to a focal distance, having telecentricity on a video source side and realizing wide viewing angle projection.A 1st negative group lens G1 has an aspherical l...  
JP3254239B2
PURPOSE: To obtain the intermediate telephoto lens which has a large diameter and has high optical performance from the infinite distance to a short distance by composing the 1st lens group of three positive meniscus lenses which have po...  
JP2001318310A
To provide a single focus lens by which excellent optical performance is obtained while making an entire length short by an inexpensive and simple configuration.A first meniscus lens L1 whose concave surface is faced to an object side, a...  
JP3247756B2
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...  
JP2001519542A
(57) In the image formation mode and the mode in which it does not image for summary amusement and the lighting for construction, the projection zoom lens system which offers the zoom ratio of 20: 1 in the mode in which it does not image...  
JP3242451B2
PURPOSE: To obtain a microscope objective lens which is bright and low in cost and has various aberrations excellently compensated by using a radial type gradient index lens which has a specific refractive index distribution radially fro...  
JP3239520B2
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...  
JP2001281537A
To obtain an f.θ lens consisting of three lenses including a doublet, where transverse chromatic aberration and other aberration are made good by satisfying specified conditional expressions. A 1st lens L1 is a plano-concave lens whose ...  
JP2001281604A
To reduce aberrations, especially curvature of the field to each light beam from each light source to a very small size and the reduce influence of the heat from the light source to a low level, when the multi-beam scanning is performed,...  
JP2001281535A
To provide a Gauss type photographing lens whose image surface is flat from the center to an off-axis peripheral viewing angle and which has high performance while securing production propriety including cost by disposing the positive, t...  
JP2001281536A
To obtain a Gauss type lens realizing brightness equal to or above about F1.4, having the angle of view equal to or above about 24 degrees, securing sufficient back focus and excellently correcting aberration in spite of compact constitu...  
JP3234618B2
PURPOSE: To obtain the large-aperture intermediate telephoto lens which has various aberrations to a short-distance object point well compensated by composing the lens of a 1st and a 2nd lens group, a stop, and 3rd-5th lens groups, and s...  
JP2001515604A
(57) On the whole, summary book invention relates to the technology of stabilizing the alignment in an interferometer (5) and the rapid scanning type Michelson interferometer (5) used with a Fourier transform spectrometer much more in de...  
JP2001242377A
To realize miniaturization and high contrast and to correct aberration such as chromatic aberration.This lens is constituted by sticking a 1st lens 11 made of resin material and a 2nd lens 12 made of glass material, and provided with an ...  
JP3221765B2
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 ...  
JP2001183578A
To provide a bright, inexpensive image pickup lens which is constituted of a small number of lenses, and which is used for a high performance CCD camera and a CMOS camera, etc. In the image pickup lens, at least one surface of a 1st lens...  
JP2001176109A
To provide a compatible optical pickup device utilizing a laser beam of two different wavelengths in a short wavelength band, a compatible optical pickup device capable of effectively correcting the occurrence of aberration owing to rapi...  
JP2001174712A
To reduce the cost by reducing the number of kinds of lenses to reduce the frequency for setting the condition of a lens working machine.The material and the shape of at least one of lenses in a front end illumination optical system of a...  
JP3201394B2
To provide an fθ lens for two-dimensionally scanning optical system for a printed board drilling work capable of realizing high fθ linearity over a wide two-dimensional scanning range, the telecentric characteristic, and the convergenc...  
JP2001166205A
To provide a compact projection lens which is composed of three groups; negative, positive and positive, is insertable with a color synthesis optical system but has an adequate back focus not longer than needed and telecentric characteri...  
JP2001507463A
(57) The spherical aberration of a summary optical beam 合焦 a beam, and is determined by dividing the section into at least two same mind zones (50, 51). The sub beam which passes through a zone is 合焦 (ed) on a focal detection sys...  
JP2001141995A
To provide an excellent optical projection lens system for photolithography. A first lens group G1 having a positive refracting power, a second lens group G2 which has a negative refracting power and consists of a waist 37 having a minim...  
JP3168424B2  
JP2001133684A
To obtain a photographic lens system which is composed of four lenses as a whole and has a high telecentric property and a high optical performance. This photographic lens system is composed of a first group, consisting of a meniscus len...  
JP2001100090A
To hold high telecentricity while securing a wide field angle and making an optical system small-sized, to secure sufficient back focus length, and further facilitate manufacturing. A 1st lens 1 composed of a concave lens, a stop 3, and ...  
JP2001100096A
To provide a wide-angle color image read lens which is relatively light and compact and can have aberrations excellently corrected by using four elements in four groups and meeting prescribed conditional expressions. This lens has a 1st ...  
JP2001100091A
To provide a photographic lens which has high resolution, small distortion aberration, long back focus, and excellent telecentricity and is compact and few in the number of constitutive lens. The photographic lens meets conditional inequ...  
JP2001504949A
(57) The lens system for summary electronic devices has two lenses. The 1st lens (1/of field side 2) has negative optical refracting power, and the 2nd lens (4/of field side 5 or 5/of field side 6) has positive optical refracting power, ...  
JP2001091828A
To provide a lens for reading an image which is composed of six lenses, namely, positive, positive, negative, negative, positive and positive in this order from an object side, which is comparatively bright, whose angle is wide and whose...  
JP2001083411A
To make the length of back focus long and to restrain aberration with good balance while attaining a wider viewing angle and high resolution by constituting a wide-angle lens of three lens groups being negative, positive and positive and...  
JP2001083415A
To provide a glass-made objective lens for excellently reproducing a DVD and a CD. At least one surface of the glass-made single lens is concentrically divided into a 1st aspherical surface area 104 including an optical axis, a 2nd asphe...  
JP2001083409A
To provide an image pickup lens which is constituted so that desired optical performance can be maintained, a back focus distance can be sufficiently secured, a high telecentric property can be secured and respective aberrations can be e...  
JP2001075006A
To excellently correct each aberration and to easily manufacture an image pickup lens while maintaining a desired optical performance and securing a wide viewing angle. This lens is constituted by successively arraying a diaphragm 4, a f...  
JP3148221B2  
JP2001066523A
To provide an eyepiece lens used for an observation optical system such as binoculars, a telescope and a microscope capable of excellently compensating aberration to the peripheral part of its field, restraining distortion aberration wit...  
JP3142127B2  
JP3140841B2  
JP2001051191A
To provide an fθ lens for two-dimensionally scanning optical system for a printed board drilling work capable of realizing high fθ linearity over a wide two-dimensional scanning range, the telecentric characteristic, and the convergenc...  
JP2001051190A
To provide a large aperture lens in which a distortion aberration is not enlarged but other various aberrations are corrected excellently, by specifying a lens formation. This large aperture lens is composed of first and second lenses L1...  
JP3134880B2  
JP3133360B2  
JP3155360B2
PURPOSE: To provide the visual display device by which images can be observed at the angle of view wider than 40° and flat and sharp images can be observed even at the periphery. CONSTITUTION: This visual display device is composed of a...  
JP3130527B2  
JP3128125B2  

Matches 801 - 850 out of 3,848