摘要:
A laser beam L1 emitted from a laser source 10 is projected onto a target 30 set in a vacuum chamber 60 while being focused by a focusing optical system 20. This results in generating fast particles P such as protons and emitting the particles from the target 30. A light measuring device 40 measures plasma emission L2 from the target 30 upon in-focus irradiation with the laser beam L1 and an analyzing device 50 analyzes a measurement signal therefrom to assess a generation state of fast particles P. Then the focusing optical system 20 and target 30 are controlled through optical system moving mechanism 25 and target moving mechanism 35 on the basis of the result of the analysis and feedback control is performed on the generation state of fast particles P in the target 30. This realizes a fast particle generating apparatus capable of monitoring the generation state of fast particles in real time and thereby efficiently generating the fast particles.
摘要:
A sheet feeding device for manually feeding a sheet to a specified apparatus such as an image forming apparatus is provided with a manual feed tray for guiding a sheet being manually fed, and a pair of cursors provided on the manual feed tray and movable in opposite directions along a sheet width direction normal to a sheet conveyance direction in accordance with the width of the sheet. The pair of cursors are operable such that the front end positions and/or the rear end positions thereof with respect to the sheet conveyance direction are shifted along the sheet conveyance direction.
摘要:
There is disclosed a die for forming a honeycomb structure, which realizes a sophisticated formability and which is superior in resistance to wear. A die for forming the honeycomb structure is provided with a die base having two surfaces, one surface is provided with slits of a honeycomb shape, and the other surface is provided with back holes which introduce a forming material therethrough. This die base includes: a die precursor which is obtained by stacking and bonding a first member which is one surface of the die base and is made of a tungsten carbide-based super hard alloy containing at least tungsten carbide, and a second member which is the other surface of the die base and is made of a metal material capable of causing at least one of three phase transformations of martensite transformation, bainite transformation, and pearlite transformation by cooling of an austenite phase together. Tensile and compressive stresses in a mutually bonded surface of the two plate-like members are 1000 MPa or less.
摘要:
An electric field measuring apparatus can guide, with a predetermined optical path length, pulse light with a short pulse width output from a laser light source to an object to be measured or an electric field sensor without expansion of the pulse width caused by wavelength dispersion, thereby enabling electric field measurement with a high time resolution. A laser luminous flux incident on an input end of an input optical system is divided by a light dividing section into probe light and pumping light. After being transmitted through a light delaying device, the probe light is guided through an articulated light guiding patt at reflecting mirror type in which a plurality of tubular light guiding sections, each of which has a light guiding path therewithin inducing substantially no wavelength dispersion with a bending point at which reflecting mirror is disposed, are rotatably cascaded to each other such that their light guiding paths coincide with each other by way of joint sections, so as to be supplied to a microscope unit. On the other hand, the pumping light is guided through an articulated probe light guiding path of reflecting mirror type so as to irradiate an object to be measured. Also, a CCD camera is coupled to the exit end of an articulated reflecting mirror type light guiding path, allowing the positioning of the point irradiated with the pumping light.
摘要:
A trigger circuit is composed of a frequency multiplying portion which receives an electric signal to be measured and multiplies its repetitive frequency so as to output a multiple signal, a comparing portion which receives this multiple signal and outputs a square wave signal corresponding to its value, and a dividing portion which divides the square wave signal so as to output a trigger signal. Accordingly, even when a noise component is superposed on the electric signal to be measured, a trigger signal having little jitter and a repetitive frequency lower than that of the electric signal to be measured is output. Also, the electric field measuring apparatus in accordance with the present invention comprises this trigger circuit and measures, with a highly accurate timing, the electric field of the object to be measured.
摘要:
A processing unit notifies a drive unit of a designated number N (=1, 2, . . . ). The drive unit supplies a drive signal of a frequency f.sub.0 to a target measurement device, and supplies a modulation signal of a frequency N.multidot.f.sub.0 +.DELTA.f to an optical modulator. In this state, a continuous emission light beam is emitted from a light source, incident on an E-O probe sequentially through a polarizer and a first optical system, influenced by a periodical voltage waveform generated at a target measurement portion at a fundamental period 1/f.sub.0 to modulate the polarized state, and output from the E-O probe. The optical signal whose polarized state is modulated is input to the optical modulator and modulated. Thereafter, a polarization direction is selected by an optical selection unit, and the optical signal is input to an photodetector 510 and heterodyne-detected. The processing unit reproduces the waveform of the voltage signal generated at the target measurement portion by calculation of Fourier transform on the basis of the obtained photodetection signal and displays the waveform.
摘要:
Young's interferometer consisting of a single slit and a double slit member, and an analyzer are arranged along the axis of light to be measured. Parallel slits of the double slit member are provided with respective polarizers whose paralyzing directions are at .+-.45.degree. to the longitudinal direction of the parallel slits. The polarizing direction of the analyzer is set in parallel with the parallel slits. The incident light passes through Young's interferometer and the analyzer to form an interference fringe, which is detected by an image detector unit. An image analyzer unit produces an intensity profile of the interference fringe and determines the polarization state of the incident light, for instance, by comparing the produced intensity profile with conceivable profiles stored in advance.
摘要:
A low noise pulsed light source utilizing a laser diode for generating a short pulsed light of a high repetitive frequency. The low noise pulsed light source includes a laser diode drived by an electric pulse generator for emitting repetitive pulsed light; a current source for supplying a bias current to the laser diode; and a photodetector for detecting the repetitive pulsed light emitted from the laser diode; and control means. The control means modulates at least one of the bias current from the current source and the amplitude of a pulse signal generated from the electric pulse generator in accordance with an output signal from the photodetector such that the intensity of the pulsed light is kept unchanged and any noise involved in the same is reduce. A feedback system including the photodetector and the control means has a peak in its frequency characteristics within a frequency band for light detecting in a light measuring system utilizing the low noise pulsed light source.
摘要:
A low noise pulsed light source using a laser diode for generating a short pulsed light of a high repetitive frequency. The low noise pulsed light source includes a laser diode drived by an electric pulse generator for emitting repetitive pulsed light; a current source for supplying a bias current to the laser diode; and a photodetector for detecting the repetitive pulsed light emitted from the laser diode; and control means. The control means modulates at least one of the bias current from the current source and the amplitude of a pulse signal generated from the electric pulse generator in accordance with an output signal from the photodetector such that the intensity of the pulsed light is kept unchanged and any noise involved in the same is reduced.
摘要:
A voltage detecting device for detecting voltages in an object under test including an electro-optic material covering a plurality of parts of the object under test; the refractive index of the electro-optic material being variable according to an applied voltage. A light source emits light through the electro-optic material toward the object under test and a detecting device receives an emergent light beam reflected from within the electro-optic material in order to detect voltages in the object. Further, a scanning device automatically scans the object under test with the light beam in order to detect voltages at a plurality of locations on the object.