Namiki Seimitsu Houseki Kabushiki Kaisha

Adamant Namiki Precision Jewel Co., Ltd.

Fujifilm Corporation

Hiroshi Yamazaki

Takafumi Asada

Eri Fukushima

Norikazu Sato

Takuya Tateyama

Kazumi Yanagiura

Masahiro Saito

Yoshinori Morimoto

Kiichi Kato

Tomoyuki Kugo

Kenji Narita

Takayuki Koshikawa

Chihiro Okamoto

Tomoyuki Kugou

Provided is an optical measurement device configured so that a high-accuracy three-dimensional image can be obtained. An emission angle of a ray of light is changed in such a manner that the rotation frequencies of two motors configured to rotatably drive a first optical path changing unit and a second optical path changing unit is controlled. The ray of light is emitted to a front three-dimensional region, and reflected light is obtained. Then, calculation is made by a computer, and in this manner, three-dimensional data on a measurement target object is obtained. The amount (vibration amount) of axial backlash or play of a rotary mechanism, such as a motor shaft, along which the ray of light is emitted is measured in real time, and such a backlash or play amount is subtracted from a three-dimensional image obtained by the computer. Consequently, a high-accuracy three-dimensional image is obtained.

Optical measurement device having a plurality of rotary shafts and displacement detectors for detecting axial displacement of each rotary shaft and using the detected axial displacement for three-dimensional image correction

An optical inner surface measurement device is provided; which includes a motor; a rotary optical fiber configured to be rotated by the motor; a fixed optical fiber configured not to rotate relative to the rotary optical fiber; and a runout detection sensor configured to measure a runout amount of the rotary optical fiber, wherein an optical path conversion device is arranged at a tip end of the rotary optical fiber, at a back of the motor, both end surfaces of the rotary optical fiber and the fixed optical fiber face each other with a minute clearance, and reflected light, which is captured by the optical path conversion device, from a measurement target object inner surface is guided to a measurement machine body by way of the rotary optical fiber and the fixed optical fiber and is analyzed by a computer to produce inner surface measurement data, and the inner surface measurement data is corrected based on the runout amount detected by the runout detection sensor.

Optical inner surface measurement device

An optical inner-surface measurement device includes: an optical fiber included inside a tube, the optical fiber being configured to be inserted into a hole of an inspection object; at least two optical-path converting elements disposed in a forward-end of the optical fiber; and a motor for rotationally driving at least one of the at least two optical-path converting elements. The at least two optical-path converting elements emit a light beam, guided thereto through the optical fiber, to an inner peripheral surface of the hole of the inspection object three-dimensionally in a circumferential direction and an axial direction of the hole.

Optical inner-surface measurement device

A 3D-scanning optical imaging probe which inhibits rotation unevenness of rotational sections, shaft run-out, friction, and rotation transmission delay by reducing the occurrence of torque loss and rotation transmission delay, and which is capable of obtaining 3D scans and observation images within a fixed frontal range. A substantially tubular catheter has, provided along substantially the same line therein: a fixed-side optical fiber; a first optical path conversion means which is rotationally driven by a first motor, and which rotates and emits a beam of light forwards and tilted at an angle with respect to a rotational axis; and a second optical path conversion means which, at a tip side of a rotation-side optical fiber rotationally driven by a second motor, tilts an optical path by a micro-angle with respect to the rotational axis, and rotates and emits the beam of light to irradiate the first optical path conversion means therewith.

Probe for optical imaging

Provided is an optical imaging probe that is able to obtain a stable observation image by a dynamic pressure bearing. An optical imaging probe for guiding rearward a light entering a front end includes: a rotation driving source adapted to drive and rotate a rotor; a tubular rotation shaft inserted and fixed over an axial direction in a rotation center side of the rotor; an optical fiber inserted in the tubular rotation shaft, the front end of which a light is able to enter; and a bearing member supporting the tubular rotation shaft in a rotatable manner, and the bearing member configures a dynamic pressure bearing adapted to generate a high lubricating oil film pressure locally at multiple positions in a circumference direction.

Optical imaging probe

Provided is optical imaging probe that is able to obtain stable observation image by optical path correction. It includes a rotation driving source adapted to drive and rotate a rotor; a first single-mode optical fiber inserted and fixed over the axial direction in the rotation center side of the rotor, the front end of which light is able to enter; a second single-mode optical fiber supported at the rear end side of the first single-mode optical fiber in a non-rotatable manner; and a gap and optical path correcting means interposed between the first single-mode optical fiber and the second single-mode optical fiber, and the optical path correcting means is adapted to expand and collimate the light transmitted from one single-mode optical fiber and pass it through the gap, and then guide it to the other single-mode optical fiber.

Higher-precision measurement is achieved by an optical inner surface measuring device configured to cause a probe to enter into the inner peripheral surface or deep hole of a target object, capture and observe reflection light from the inner surface in a three-dimensional manner, and measure the accuracy of the target object. In a structure including an optical fiber built into a tube, a light path conversion unit arranged at a leading end side of the optical fiber, and a motor configured to rotationally drive the light path conversion unit, a unit for measuring the amount of runout of a rotation shaft unit of the motor is provided. Shape data on the inner peripheral surface of a target object is obtained by calculating at a computer reflection light from the target object, and is modified by displacement amount data from a displacement measurement unit to realize high-precision measurement with no measurement error resulting from runout and rotational vibration of the rotation shaft of the motor.

Optical inner surface measuring device

A probe for a three-dimensional (3D) scanning optical imaging which prevents rotational irregularity, axial runout, friction, rotation transmission delays of a rotational part by reducing occurrences of rotation transmission delays, torque loss, and the like, and can perform scanning of a certain length in an axial direction and obtain a three-dimensional observation image, in a probe for OCT image diagnosis. A fixed side optical fiber that transmits light between a tip side and a rear side of a probe and is non-rotatably disposed, a first optical path conversion means that rotates to emit a light ray in a substantially radial direction, a rotation side optical fiber which is rotated by a motor, and a second optical path conversion means that rotates and emits light toward the first optical path conversion means are collinearly disposed. In this way, it is possible to obtain a high quality 3D observation image.

Provided is an ultrasonic endoscopic probe capable of obtaining an ultrasonic observation image having high spatial resolution. A part of a substantially tubular catheter is sealed with seal plates to provide a cavity housing: a motor including a motor casing, a rotor magnet, a bearing, and a rotating shaft; an ultrasonic transducer mounted to the rotating shaft; and a signal transmission means. The bearing includes an inner peripheral surface provided with a plurality of dynamic pressure generating grooves. An acoustic coupling fluid is sealed in the cavity and is allowed to penetrate a gap between the bearing and the rotating shaft at all times. When the ultrasonic transducer and the motor are rotated in the acoustic coupling fluid, the acoustic coupling fluid is suctioned in a preferable manner into the bearing gap having the dynamic pressure generating grooves for lubrication. Thus, a lack of an oil film on the bearing can be prevented, allowing for high accuracy rotation. Operational failure due to the development of foam in the acoustic coupling fluid can be prevented, enabling the acquisition of a high resolution ultrasonic observation image.

Ultrasonic endoscopic probe

An OCT probe has a sheath to be inserted into a subject; and an optical system within the sheath, for changing the direction of light which propagates from a light source through an optical fiber to irradiate the light onto the subject through a transparent portion of the sheath, and for reflecting the light beam, which is reflected by the subject, to guide the light into the optical fiber. A light output surface, for causing the light to be output from the reflecting surface in a direction obliquely inclined with respect to the inner surface of the sheath, and a reflected light sheath entrance preventing portion, for preventing light reflected by the inner surface of the sheath from entering the optical fiber, are provided in the optical system. The reflected light sheath entrance preventing portion may be formed by providing a cut planar surface portion on the lens.

Growing community of inventors

Kuroishi, Japan

Hiroshi Yamazaki