FUJINON CORPORATION Patent applications |
Patent application number | Title | Published |
20110299161 | RETARDATION COMPENSATION ELEMENT AND MANUFACTURING METHOD OF THE SAME - Two types of layers are simultaneously formed on a substrate and another substrate under the same layer forming condition, the heights of which are equal to a half height of an intended retardation compensation layer. Physical properties of the respective two types of layers formed on the substrates are identical to each other, and if deviations are produced in retardation distribution characteristics for azimuth angles of incident light, these deviations are commonly provided in the respective two types of layers. When one substrate is superposed with the other substrate and these superposed substrates are integrated with each other in order to make a single sheet of retardation compensation element, after one of these substrates is rotated by an angle of 90 degrees with respect to the other substrate, these substrates are stuck to each other by an adhesive agent. | 12-08-2011 |
20100315728 | OPTICAL PART HOLDING MEMBER AND PRODUCTION METHOD THEREOF - The present invention relates to an optical part holding member made of ceramic and a production method thereof, and provides an effective permeability to prevent dew condensation. The optical part holding member is made of a silicon nitride ceramic base composite material to hold an optical part, which is produced through a process of nitriding in which silicon is caused to react with nitrogen. By using the silicon nitride ceramic base composite material containing silicon carbide and an iron compound, an airflow volume of 50 ml or more per minute is achieved in an effective airflow area of 1.5 cm | 12-16-2010 |
20100315727 | OPTICAL PART HOLDING MEMBER AND PRODUCTION METHOD THEREOF - The present invention relates to an optical part holding member made of ceramic and a production method thereof, and provides an optical part holding member made of ceramic such that a sintered body after processes of degreasing and sintering has small dimensional changes over dimensions of a mold, and a production method thereof. An example includes a lens holder to hold an optical part, made of a silicon nitride ceramic base composite material produced through a process in which silicon and nitrogen are reacted to be nitrided and contains silicon carbide and an iron compound. | 12-16-2010 |
20100271700 | METHOD FOR DRIVING PIEZOELECTRIC ACTUATOR, PIEZOELECTRIC-ACTUATOR CONTROL CIRCUIT, AND IMAGE-STABILIZATION CONTROL CIRCUIT - Abnormal noise generated while driving a piezoelectric actuator is prevented. A pulse-generation circuit is capable of selectively generating a displacement pulse and a stationary pulse as a drive pulse for application to a piezoelectric element, the displacement pulse having a duty ratio for causing a lens to be displaced by a predetermined step width, and the stationary pulse having a duty ratio for causing the lens to remain stationary in a current position. The pulse-generation circuit controls the production of the drive pulse continuously for a plurality of times within the servo control cycle, causes the displacement pulse to be produced when the remainder of a required amount of displacement is equal to or greater than a threshold value, and causes the stationary pulse to be continuously produced until the initiation of the next servo control cycle when the remainder is less than the threshold value. | 10-28-2010 |
20100195107 | SURFACE PLASMON RESONANCE MEASURING CHIP AND METHOD OF MANUFACTURE THEREOF - A surface plasmon resonance measuring apparatus is provided with a dielectric block, a metal film formed on a surface of the dielectric block, a light source for emitting a light beam, an optical system for making the light beam enter the dielectric block at various angles of incidence so that a condition for total internal reflection is satisfied at an interface between the dielectric block and the thin film layer, and a photodetector for detecting the intensity of the light beam satisfying total internal reflection at the interface. In the measurement chip to be utilized in the surface plasmon resonance measuring apparatus, the dielectric block is formed from a synthetic resin in which, when said light beam is p-polarized outside said dielectric block and then strikes the interface, the intensity of a s-polarized component at the interface is 50% or less of the intensity of the light beam at the interface. | 08-05-2010 |
20100128345 | PROJECTION OPTICAL SYSTEM AND PROJECTION DISPLAY DEVICE USING THE SAME - A projection optical system having a magnification side and a reduction side for forming a magnified image on a magnification side image surface conjugate with a reduction side conjugate image surface includes, arranged in order from the reduction side, a first imaging system including a plurality of lens elements and lens components and a second imaging system including a mirror having a concave, aspheric reflecting surface. An intermediate image is formed between the first imaging system and the second imaging system. The projection optical system satisfies specified conditions related to the travel of principal rays through the projection optical system and related to the Abbe number of a lens element having positive refractive power of the first imaging system. A projection display device includes the projection optical system and may include a light valve for modulating a light beam for projection on a screen. | 05-27-2010 |
20100020411 | PROJECTION VARIABLE FOCUSING LENS AND PROJECTION DISPLAY DEVICE - Disclosed is a projection variable focusing lens and a projection display device that has a reduction side which is telecentric, a high magnifying power, a small size, a light weight, and a low manufacturing cost and is capable of correcting all aberrations occurring when power varies with good balance. | 01-28-2010 |
20090287051 | ENDOSCOPE SYSTEM AND OPERATION METHOD FOR ENDOSCOPE - According to the endoscope system of the present invention, when the image pickup device of the first endoscope device detects illumination light irradiated from the illumination device of the second endoscope device, the control device performs control so as to reduce light quantity of the illumination device of the second endoscope device based on the level of luminance signal outputted from the solid state image pickup element of the image pickup device, and when the image pickup device of the second endoscope device detects illumination light irradiated from the illumination device of the first endoscope device, the control device performs control so as to reduce light quantity of the illumination device of the first endoscope device based on the level of luminance signal outputted from the solid state image pickup element of the image pickup device. | 11-19-2009 |
20090251704 | OPTICAL ROTARY ADAPTER AND OPTICAL TOMOGRAPHIC IMAGING SYSTEM USING THE SAME - The optical rotary adapter is used with an optical tomographic imaging system for acquiring an optical tomographic image of an object under measurement. The adapter includes a fixed sleeve, a stationary optical fiber supported by the fixed sleeve and having an inclined end face, a stationary collimating lens spaced a given distance from the inclined end face, a mounting cylinder carried rotatably with respect to the fixed sleeve, a rotary optical fiber mounted to the mounting cylinder and having an inclined end face, a rotary collimating lens mounted to the mounting cylinder and disposed with a given distance from the inclined end face, and a rotation actuating device for rotating said mounting cylinder. The central axes of the stationary and rotary optical fibers are offset from or inclined with respect to a central axis of rotation of the mounting cylinder to reduce attenuation of returning light from the object. | 10-08-2009 |
20090247875 | ULTRASONIC GENERATOR - An ultrasonic transducer ( | 10-01-2009 |
20090244711 | IMAGING FILTER - An imaging filter disposed on a front surface of an image sensor and serving to limit an incident angle of light on the image sensor is provided. The filter includes: a transparent substrate; a first shielding film provided on the front surface of the substrate and having a plurality of incidence openings, the incidence openings having a constant size and provided at an interval; a second shielding film provided on a back surface of the substrate and having a plurality of emission openings, the emission openings having a constant size and having centers which are coincident with the incidence openings; and a reflecting film provided on at least one of the front surface and the back surface of the substrate and including a multilayer dielectric film that transmits light having a wavelength and being incident almost vertically on the reflecting film and that that reflects the light having the wavelength and being incident obliquely on the reflecting film. | 10-01-2009 |
20090213387 | OPTICAL PROBE AND OPTICAL TOMOGRAPHIC IMAGE PRODUCTION APPARATUS USING THE PROBE - An optical tomographic image production apparatus includes an optical probe, in which a light-transmitting area that transmits measurement light and a light-blocking area that blocks the measurement light are formed. The light-blocking area is provided at a start position and an end position of the light-transmitting area. A tomographic image processing means detects an interference signal or tomographic information when the light-blocking area is irradiated with the measurement light. Further, the tomographic image processing means detects, based on the detected interference signal or tomographic information, interference signals or tomographic information obtained when the light-transmitting area is irradiated with the measurement light to produce a tomographic image in the light-transmitting area. | 08-27-2009 |
20090209824 | OCT OPTICAL PROBE AND OPTICAL TOMOGRAPHY IMAGING APPARATUS - Safe and inexpensive visual confirmation of the scanning position of an OCT optical probe, which is inserted into a forceps channel of an endoscope, is provided. The OCT optical probe to be inserted into a forceps channel of an endoscope that applies illumination light to a site to be observed in a body cavity and images reflected light from the site to be observed, includes: a substantially cylindrical and long sheath to be inserted into the body cavity; a distal end optical system disposed in the sheath and being rotatable about the longitudinal axis of the sheath; and a ferrule integrally fixed to the distal end optical system, wherein the ferrule includes a reflecting section adapted to reflect a part of the illumination light toward the endoscope. | 08-20-2009 |
20090198125 | OCT OPTICAL PROBE AND OPTICAL TOMOGRAPHY IMAGING APPARATUS - An OCT optical probe to be inserted into a subject includes: a cylindrical sheath to be inserted into a subject; an optical fiber disposed in the internal space of the sheath; a rotatably-supporting portion fixed to the optical fiber in the vicinity of a distal end of the optical fiber; a distal optical system to deflect light emitted from the distal end of the optical fiber toward the subject; a holding portion to hold the distal optical system such that the optical system is rotatably supported by the rotatably-supporting portion; and a flexible shaft covering the optical fiber in the internal space, wherein the holding portion is fixed to a distal end of the flexible shaft. Using the OCT optical probe of the invention, the problem of degradation of measurement accuracy due to optical insertion loss and optical reflection loss at a rotary joint can be eliminated inexpensively and safely. | 08-06-2009 |
20090174886 | SYSTEM FOR PRODUCING TOMOGRAPHIC IMAGE BY OPTICAL TOMOGRAPHY - In optical tomography measurement using light, the wavelength of which is periodically swept, interference light between reflection light and reference light is split into first interference light and second interference light by a light splitting means. The optical path length of the first interference light and that of the second interference light are adjusted by an interference-light optical path length adjustment means so that they become the same. Further, balanced detection is performed on the first interference light and the second interference light by an interference light detection means. | 07-09-2009 |
20090168071 | METHOD AND SYSTEM FOR PRODUCING TOMOGRAPHIC IMAGE BY OPTICAL TOMOGRAPHY - When reflection light, reflected from a measurement target that has been irradiated with measurement light in such a manner to scan the measurement target, and reference light are combined in each wavelength sweep, interference light is detected as interference signals. When a thinning region in which the interference signals obtained by detecting the interference light in each wavelength sweep are thinned so that the interference signals that are used to produce the tomographic image remain is set, thinning is performed on the plurality of interference signals in the thinning region. Light intensity information about the measurement target in the thinning region is obtained, based on the interference signals for the respective wavelength sweeps, the interference signals remaining after thinning. The tomographic image in the thinning region is produced based on the obtained light intensity information. | 07-02-2009 |
20090105739 | High frequency tool - A frequency tool for use in endoscopic electro-surgery, the high frequency tool having a high frequency knife at a distal end of a flexible cord encased in a tube member of a flexible sheath. A tubular rigid tip member of electrically insulating material is fitted in a fore distal end portion of the tube member, forming an annular flat end face together with the tube member. Formed internally of the tubular rigid tip member is a through axial passage hole to receive therein a retractably protrusible electrode member of the high frequency knife. At a fore distal end of a rod portion, the electrode member is provided with a spherically bulged portion of a diameter smaller than inside diameter of the axial passage hole of the tubular rigid tip member. | 04-23-2009 |
20090086213 | OPTICAL TOMOGRAPHIC IMAGING SYSTEM - The optical tomographic imaging system includes a main body for acquiring an optical tomographic image, an optical probe having a rotary optical fiber for guiding the measuring and returning light, a measuring unit, and a sheath rotatably holding the rotary optical fiber and the measuring unit, a rotary drive unit for rotatably coupling the rotary optical fiber to a stationary optical fiber connected with the main body, an extra length handling mechanism for winding the optical probe into a loop having at least a minimum diameter and an attaching unit removably attaching the optical probe. The extra length handling mechanism winds an extra length of the optical probe by a length depending upon a length up to the location to be examined. The system eliminates the need to change the optical probe depending upon the location to be examined and the need to adjust the optical path length of reference light. | 04-02-2009 |
20090073454 | OPTICAL TOMOGRAPHY IMAGING SYSTEM, CONTACT AREA DETECTING METHOD AND IMAGE PROCESSING METHOD USING THE SAME, AND OPTICAL TOMOGRAPHIC IMAGE OBTAINING METHOD - The optical tomography imaging system includes a light source, a branching section which branches a light beam into a measuring light beam and a reference beam, an optical probe having an optical fiber, a measurement section which irradiates a measurement target with the measuring beam and picks up a reflected beam, and a sheath which encloses the optical fiber and the measurement section, a multiplexing section which combines the reflected beam with the reference beam to create an interference beam, an interference beam detecting section which detects the interference beam as interference signals, and a contact detecting section which detects a contact area in which the optical probe and the measurement target are in contact with each other. The contact detecting section calculates from the detected interference signals a distance between the optical probe and the measurement target, and uses the calculated distance to detect the contact area. | 03-19-2009 |
20090021739 | IMAGING APPARATUS - An imaging apparatus includes a light source unit that selectively outputs white light and light in a different wavelength band to an observation target, an imaging unit including an imaging device, and a spectral image formation circuit that generates a spectral image signal for a specified wavelength by an operation using an image signal based on an output from the imaging unit and predetermined matrix data. The imaging unit selectively obtains an image of the observation target for each of first, second and third light components in a visible light region and an image for each of at least fourth and fifth light components in a near-infrared region. Further, the imaging unit includes first spectral devices that make only the first and fourth light components enter first pixels of the imaging device and second spectral devices that make only the second and fifth light components enter second pixels thereof. | 01-22-2009 |
20080294159 | High frequency surgical instrument - A high frequency surgical instrument having a forceps assembly at a fore distal end of an elongated insertion member, the forceps assembly being constituted by a pair of opening and closing grasper members which are shaped with a series of saw teeth on an inner meeting side in such a way that saw tooth portions on the two grasper members are at least partly brought into abutting engagement with each other when the grasper member are closed. For manipulating opening and closing actions of the grasper members, a manipulative transmission means is threaded through the insertion member, connecting the paired grasper members of the forceps to a manipulation handle which is attached to a proximal end of the insertion member. Each one of the grasper members is formed of a conducting material and arranged to have a width narrower than outside diameter of the insertion member on the saw-toothed inner side. The grasper members are electrically connectible to a high frequency power source, and are entirely covered with an insulating coat except saw tooth portions. | 11-27-2008 |
20080291552 | Projection lens unit having reflection mirror in projection lens system and method of and equipment for fixing reflection mirror | 11-27-2008 |
20080291320 | DIGITAL CAMERA - In a digital camera, a solid state imaging device is used to catch subject light so that an image signal is created. The digital camera contributes to effectively implementing further thinness in such a manner that a part of image taking lenses is saved to a suitable position at the time of the collapse. Both the rear elements lens and the focus lens are revolved between a position on the optical axis and a saving position coming into a hollow portion beside the CCD solid state imaging device, or between the position on the optical axis and a saving position in which the front elements lens, the rear elements lens and focus lens form a line substantially on a plane. | 11-27-2008 |
20080260342 | OPTICAL PROBE AND OPTICAL TOMOGRAPHY APPARATUS - An elongated probe to be inserted into a tube which is open at a distal end portion of an insertion section of an endoscope includes a sheath constituting the outer circumferential surface of the optical probe, an optical fiber laid in the internal space of the sheath along the longitudinal direction of the sheath, and a deflection scanning means disposed in the internal space of the sheath to deflect light outputted from the optical fiber and is rotated around an axis line extending in the longitudinal direction to scan the deflected light in a circumferential direction of the axis line. A plurality of light transmission sections for transmitting the scanning light is provided, each formed flat on the outer surface, on a side wall of the sheath along the circumferential direction. | 10-23-2008 |
20080252900 | OPTICAL TOMOGRAPHY SYSTEM - In an optical tomography system, polarization maintaining optical fibers are employed to guide a light beam emitted by a light source unit to a light dividing means, to guide a measuring light beam from the light dividing means to a probe, to guide the measuring light beam and a reflected light beam within the probe, to guide the reflected light beam from the probe to a combining means, and to guide a reference light beam from the light dividing means to the combining means. | 10-16-2008 |
20080240668 | INTEGRATOR UNIT - An integrator unit for integrating an incoming light beam for a uniform distribution of illumination comprises an inner cylinder fixedly equipped with a rod integrator, an outer cylinder in which the inner cylinder is coaxially received for axial movement and axial adjustment members which comprises a circumferential groove spatially squared to a center axis of the inner cylinder and a radial access bore formed in the outer cylinder. A round shaped position adjustment tool has an end pin on a round end face thereof in a position off center from an axis of rotation of the position adjusting tool. The position adjusting tool is inserted in the radial access bore to put the end pin in the circumferential groove and turned in the radial access bore so as thereby to move the inner cylinder axially back and forth. | 10-02-2008 |
20080239496 | OPTICAL FILTER - An optical filter has a multilayer thin film comprising first to i-th layers stacked in alternate layers of high and low refractive indices on a transparent substrate. Respective odd-numbered layers (Sigh refractive index layers) and respective even-numbered layers (low refractive index layers) form repetitive sequences of layers each of which cyclically changes in optical thickness throughout the multilayer tin film. Each of k-th from-the-bottom alternate layers of high and low refractive indices has such an optical thicknesses as meet the following conditional expressions (1) and (2), concurrently: | 10-02-2008 |