摘要:
The invention is concerned with the miniaturization of construction of solid state imaging devices used in electric cameras, endoscopes or the like. A flexible printed circuit board assembled with some peripheral components thereon is attached to a side surface of a solid state imaging element to expose the element directly to incident light. The element is composed of a CCD chip and a light transparent cover sized about same as the CCD chip, and both are electrically connected using conduction bumps.
摘要:
A driving circuit controls a time for applying a drive signal to a piezoelectric element so as to bring a control in the number of ink droplets squirted from a liquid surface of liquid ink according to a gray scale level of an image to be printed on a printed object. According to application of the drive signal, acoustic waves emitted from a piezoelectric element array are focused in a main scanning direction, made incident to an acoustic lens via an acoustic matching layer, further focused in a direction orthogonal to the main scanning direction and focused in a vicinity of the liquid surface in a point form. In the vicinity of the liquid surface, an ink liquid mound is formed by means of pressure (discharging pressure) generated by the focused acoustic waves and then from a tip of the ink liquid mound an ink droplet according to the application time is squirted. The squirted ink droplet is ejected and stuck to the printed object. By performing main and subscanning to the printed object, a two-dimensional image is printed thereon.
摘要:
Disclosed is a piezoelectric single crystal which has a large electromechanical coupling coefficient and hardly brings about depolarization due to the effect of heat in, e.g., the steps of manufacturing an ultrasonic transmitting/receiving element. The piezoelectric single crystal consists essentially of a general formula:Pb{[M1.sub.1/3 Nb.sub.(2/3)-(2z/3) Ta.sub.2z/3 ].sub.1-x-y Ti.sub.x M2.sub.y }O.sup. 3wherein M1 represents at least one metal selected from the group consisting of Zn, Ni, and Mg, M2 represents at least one metal selected from the group consisting of Pt, Fe, Bi, Rh, and Ir, and x, y, and z are defined as 0.05.ltoreq.x.ltoreq.0.2, 0.00001.ltoreq.y.ltoreq.0.01, and 0.ltoreq.z.ltoreq.0.1, respectively.
摘要:
An ultrasonic probe is characterized in that a piezoelectric member 111 formed of solution-based single-crystal containing at least plumbum titanate is sandwiched between resin layers 113 and 115 having smaller acoustic impedance than the piezoelectric member and having conductivity, so processing errors are prevented from occurring during cutting and the resin layers can be used as acoustic layers or electrodes.
摘要:
A video camera includes a vibration generation section including a camera body having a lens system with an auto-focus mechanism, an image pickup element, arranged along an optical axis of the camera body, for picking up an optical image obtained through the lens system, and a piezoelectric actuator for linearly vibrating the image pickup element with a predetermined amplitude at a predetermined period along the direction of the optical axis, an image signal processing circuit for A/D-converting a plurality of images time-serially obtained at arbitrary positions within the amplitude of the image pickup element vibrating along the optical axis, and an image memory for storing the plurality of time-serial images, further including an image input processing section consisting of an in-focus decision/extraction circuit for selecting and extracting clear in-focus areas of a predetermined image area, and an image synthesizing circuit for selecting desired ones of the plurality of areas from the image memory and synthesizing the selected areas into one image. The video camera of this invention further includes an intrusion decision function wherein a time-serial image having small positional and time differences is used within picked image coordinates, an optical flow between these features areas is obtained, and intrusion is decided by using the FOE point from which motion vectors of a stationary object are generated from a motion vector string obtained from the corresponding area in this optical flow.
摘要:
An ultrasonic probe system is disclosed, which is designed to allow connection of a DC power supply capable of applying a voltage higher than the coercive electric field of each of a plurality of piezoelectric layers thereto, and includes a polarization turn over circuit means for, when the DC power supply is driven, turning over the polarity of the DC power supply so as to direct electric fields of every two adjacent layers constituting the piezoelectric layers in substantially opposite directions or electric fields of all the layers in the same direction. When the polarization turn over circuit means turns over the polarity of a voltage to be applied to direct electric fields of every two adjacent layers of the piezoelectric layers in substantially opposite directions or electric fields of all the layers in the same direction, the polarization turn over circuit means performs control to apply the voltage during a blanking time of an operating time of the system, thereby performing conversion of a resonance frequency, and selectively generating ultrasonic waves having a plurality of different frequencies.
摘要:
In an automatic focus control apparatus for a video camera including an image pick-up element for picking up an optical image obtained through a lens system composed of a focus lens group, a zoom lens group, a focal position correction lens group and a relay lens group and a defocus detector for detecting a defocus signal corresponding to a defocus of the lens system from an image signal output from the image pickup element, a piezoelectric actuator is provided to move the image pick-up element in an optical-axis direction in accordance with the defocus signal and a motion transmission mechanism connects the image pick-up element to the relay lens group of the lens system to allow that lens group to be moved in a direction opposite to that in which the image pick-up element is moved. A stroke burden which is borne by the piezoelectric actuator can be alleviated by moving the relay lens group together with the image pick-up element.
摘要:
An ultrasonic probe provided with an ultrasonic wave-transmitting/receiving element comprising a 1-3 type or 2-2 type composite piezoelectric body exposing a piezoelectric monocrystal from at least one of the faces of the composite piezoelectric body, and an electrode mounted on at least one of the faces of the composite piezoelectric body, wherein the composite piezoelectric body comprises a piezoelectric monocrystal whose electromechanical coupling coefficient ratio k.sub.33 /k.sub.t is 1.6 or more, and a resin whose acoustic impedance Zp is 4.times.10.sup.6 kg/m.sup.2 s or less.
摘要翻译:一种超声波探头,其具有超声波收发元件,该超声波收发元件包括从复合压电体的至少一个表面露出压电单晶的1-3型或2-2型复合压电体,以及安装在复合压电体的电极 复合压电体的至少一个面,其中复合压电体包括机电耦合系数比k33 / kt为1.6以上的压电单晶,声阻抗Zp为4×10 6 kg / m 2·s以下的树脂。
摘要:
An ultrasound medical treatment system capable of determining the hot spot at high spatial resolution, and preventing the displacement of the hot spot from the focal point. In the system, the imaging device for obtaining image data of a treatment portion containing a treatment target and an irradiation device for applying radiation onto the treatment target are controlled in such a manner that the imaging device is controlled to obtain hot spot detection image data after the irradiation device is controlled to apply radiation at a prescribed level, so that a hot spot indicating a change due to a temperature change caused by the radiation at the prescribed level can be detected from the hot spot detection image data. The irradiation device is then controlled to apply a treatment radiation at a treatment level higher than the prescribed level according to the detected hot spot.
摘要:
An ultrasonic imaging apparatus includes an ultrasonic transducer for outputting an ultrasonic beam and converting the echo of the ultrasonic beam into an echo signal, a transmitter section for supplying a drive signal to the ultrasonic transducer, a receiver section for receiving the echo signal output from the ultrasonic transducer and converting the echo signal into an image signal, and a coaxial cable for coupling the ultrasonic transducer to the transmitter and receiver sections. The ultrasonic transducer is constituted by a two-layer ultrasonic transducer having an impedance smaller than an impedance of the coaxial cable.