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JP2005134486A |
To realize a color image reading lens constituted of a small number of lenses, that is, five lenses of four groups, which is bright, where the curvature of field is satisfactorily corrected with aperture efficiency near to 100% to a peri...
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JP2005122899A |
To provide a compatible type optical pickup device which uses laser beams of two wavelengths which are different with each other of a short wavelength band and a compatible type optical pickup device which can correct aberration occurrin...
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JP2005107369A |
To provide a telephoto lens which has high performance and which is extremely compact by effectively using an aspherical surface though the telephoto lens is constituted of a small number of lenses.The telephoto lens is equipped with a d...
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JP2005108321A |
To provide an optical pickup device in which interchangeablity is provided to a plurality of kinds of optical disks and cost and the size are reduced without sacrificing the degree of freedom in the design of the objective optical system...
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JP2005107370A |
To provide an optical system whose distortion is made hardly conspicuous in practical use even when the optical system is constituted of a small number of lenses.The coupling optical system is constituted to satisfy following conditional...
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JP2005107523A |
To provide a compact and high-resolution objective lens for stereoscopic microscope inspection having not only a flat image plane but large work distance.A second lens with focal distance of 1.30f to 1.45f, a third lens with focal distan...
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JP3629064B2 |
PURPOSE: To provide a method for selecting the optical material of a color correction lens system. CONSTITUTION: Concerning the prescribed lens system, the terms of colors in axial direction are generated and concerning the prescribed le...
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JP2005062282A |
To make a fluctuation in flange back accompanying a molding error of a central thickness of a front lens smaller.The photographic lens 10 comprises a first positive lens 11 of a meniscus shape turning its convex surface toward an object ...
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JP2005049851A |
To provide a method for generating illumination light whereby spectral properties or color properties can easily be controlled and can be established in a reliable manner in lighting system used for an projecting engine.The lighting syst...
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JP2005031638A |
To provide an image-formation optical system simultaneously satisfying the reduction of cost, the wide angle of view, high performance and miniaturization.The image-formation optical system is constituted by arranging a negative lens L1 ...
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JP2005017734A |
To provide a compact high resolution projecting optical device in which the aberrations are favorably corrected while securing a sufficiently large image side numerical aperture and a sufficiently wide effective imaging area.The projecti...
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JP3611558B2 |
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JP3610160B2 |
A photographic lens system which is composed, in order from the object side, of a first lens element having a positive refractive power, a second lens element having a negative refractive power, a third lens element having a positive ref...
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JP3106392U |
A lens assembly in a camera includes a first meniscus lens ( 10 ) and a second meniscus lens ( 11 ) respectively having a first radius of curvature (A,A') and a second radius of curvature (B,B') larger than that of the first radius of cu...
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JP2005004028A |
To provide a small-sized, high-performance imaging optical system and an imaging apparatus using the imaging optical system.As for the imaging apparatus equipped with the imaging optical system and an imaging element arranged on the imag...
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JP2005004045A |
To provide an imaging lens made small-sized and lightweight while maintaining high optical performance, and capable of securing appropriate back focus and also maintaining high telecentricity.The imaging lens is constituted by disposing ...
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JP3600120B2 |
To make total transmitted light quantity maximum and to obtain a bright and excellent observed image by including at least two or more surfaces having optical refractive power between an object image and a pupil position and satisfying a...
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JP3595317B2 |
To provide a wide-angle optical system for a solid-state image pickup element capable of excellently correcting distortion aberration. An image pickup lens 2 is a biconcave lens, and its surface on an image surface side is formed in asph...
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JP3595308B2 |
To provide an image pickup lens capable of realizing the enhancement of telecentricity by maintaining a distance between an exit pupil and a sensor, the improvement of optical performance by effectively correcting coma aberration and dis...
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JP3594088B1 |
An image lens is provided in which various aberrations are favorably corrected, the optical length is short, and a sufficient back focus is secured. The imaging lens is constituted by arranging a first lens (L1), an aperture diaphragm (S...
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JP3593530B2 |
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JP2004326097A |
To provide an image forming optical system capable of simultaneously satisfying high performance and miniaturization.The image forming optical system is constituted of a positive meniscus lens L1 to be a 1st lens turning a convex to the ...
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JP3590439B2 |
PURPOSE: To obtain an endoscopic objective lens which is wide in visual field angle, short in the overall length of the lens, long in back focus and excellent in optical performance. CONSTITUTION: This endoscopic objective lens is compos...
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JP3588517B2 |
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JP3585297B2 |
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...
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JP2004304596A |
To provide a multi-projection system in which switching of passages can be dealt with quickly without performing calibration every time when the passage is switched, and a high resolution high quality image free from color unevenness can...
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JP3573575B2 |
An optical system comprising a radial type gradient index lens component which has a refractive index distribution in a radial direction from an optical axis in a medium thereof, and configured to correct chromatic aberration sufficientl...
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JP3569379B2 |
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...
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JP3567109B2 |
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 ...
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JP3566460B2 |
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JP3564107B2 |
This invention is related to a compact photographing lens wherein an aperture stop is arranged at a position closest to an object, a first lens group, a second lens group, and a third lens group are arranged sequentially from the object ...
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JP3559608B2 |
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JP3559623B2 |
A first lens group having a four-lens configuration of positive, negative, negative, and positive lenses and a second lens group comprising at least two lenses are disposed successively from the object side, while these lenses are made o...
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JP2004240063A |
To provide an imaging lens having performance suitable for an imaging apparatus having a large number of pixels and constituted to be more compact.The imaging lens all the surfaces of which are aspherical is equipped with: an aperture st...
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JP2004226487A |
To provide a bright small-sized inexpensive imaging lens system capable of attaining a viewing angle of >30°, whose whole length is shortened, and wherein various kinds of aberration are satisfactorily corrected.The imaging lens is cons...
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JP2004212467A |
To make a photographic lens used for a mobile camera etc., thinner.The photographic lens is constituted of an aperture diaphragm 1 of a prescribed diameter, a 1st lens 2 having a positive refractive power and whose convex S2 faces an obj...
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JP3548331B2 |
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...
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JP3547103B2 |
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, ...
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JP2004522185A |
A high-aperture objective comprising a first lens L1 with positive refractive power f1 and a second lens L2 with negative refractive power f2, wherein the focal length ratio between the two lenses is in the range of -0.4<(f1/f2)<-0.1 and...
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JP3544972B1 |
An embodiment of the present invention is an imaging lens in which various aberrations are satisfactorily corrected, the optical length is short, and a sufficient back focus is secured. The imaging lens is constituted by arranging a firs...
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JP3545654B2 |
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...
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JP2004199092A |
To provide an imaging lens which can be made small-sized and light-weight and can have manufacturability improved while maintaining optical performance.A first lens 2 being a positive-power meniscus lens having the convex turned to the o...
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JP3541983B2 |
PURPOSE: To improve the performance at a finite distance and the oparability of a symmetric type optical wide-angle lens arranging a negative lens system at both sides of a convergent system having an aperture diaphragm. CONSTITUTION: Th...
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JP2004184987A |
To provide an imaging lens utilized as a compact and high-resolution imaging lens used for a camera mounted in a portable telephone, a PC camera, a monitor camera and a digital still camera or the like using an imaging device such as a C...
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JPWO2002069014A1 |
The present invention is for an optical pickup having an aperture number of 0.8 or more and correcting chromatic aberration at an image point on the optical axis for light in a wavelength range of several nm or less based on 420 nm or le...
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JP2004170883A |
To provide a wide-angle photographic lens which is shortened in overall length and has high telecentricity although the lens has a wide angle.An imaging device has, in order from an object side to an image-plane side, a stop 3, a wide-an...
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JP3538341B2 |
To provide a small-sized and light-weighted telephoto macro-lens system to allow life-size photographing, suitable for an AF camera, and having high optical performance. This system is composed, in order from an object side, of the first...
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JP3536939B2 |
PURPOSE: To simplify the constitution of a collimator lens of three-element constitution which consists, successively from a parallel luminous flux side, a biconvex positive lens, a negative lens having a concave face on the parallel lum...
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JP3536940B2 |
PURPOSE: To improve the offaxial performance of a collimator lens of 4-element constitution which consists, successively from a parallel luminous flux side, a biconvex positive lens, a negative lens having a concave face on the parallel ...
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JP2004164609A |
To provide a universal input device usable on a variety of platforms, while providing a common user interface.The universal input device includes an image capturing unit for capturing an image in an area of an object over which the input...
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