Abstract: A streak camera having two pairs of orthogonal deflecting electrodes for producing elliptical waveform patterns. The sweep frequency is synchronized with a repetitive light source, and the eccentricity and position of the elliptical waveform can be adjusted such that part of the sweep excites the phosphor output screen and a return portion of the sweep may occur off the phosphor screen.

Abstract: A streak camera device comprising plural streak tubes generating a plurality of tube outputs for simultaneous measurement of a plurality of separate characteristics of a light emissions, the plural streak tubes forming electron beams in response to the light emission; a deflecting signal generating device including only a single deflecting signal generating device generating a deflection output for simultaneously deflecting the beams of the plural streak tubes; and a device for recording the tube outputs of the streak tubes.

Abstract: An apparatus for optically observing a wavefront from an object on real-time basis to determine an optical characteristic of the object and observing two-dimensional images at positions taken in the direction of the depth of a three-dimensional object, that is, equidistant images on real-time basis, using four-wave mixing technique.

Abstract: An optical joint for joining a first light transmissive material to a second light transmissive material. The joint comprises a transparent adhesive layer between the first and second materials, and an antireflection film between each of the first and second materials and the adhesive layer. The joint prevents Fresnel reflection which would otherwise occur between the light transmissive materials.

Abstract: A streaking tube has fiber cables, and the fiber cables are buried in a faceplate made of glass or fiber and arranged in line passing through the center of the faceplate so that the inner edges of the respective fiber cables are set to the inner surface of the faceplate. A photocathode is formed thereon. Any faceplate areas other than those of the fiber cables are shielded to eliminate unwanted noises.

Abstract: In a microwave holographic device, the main lobe of a microwave antenna is spatially scanned to receive a microwave signal reflected from an object. The received microwave signal is mixed with a reference signal to generate two-dimensional electric information, synchronized with the scanning. The two-dimensional electric information is used to change the optical properties of an electrooptic material, and then the optical property changes are read out to obtain a holographic image.

Abstract: A neighbor image processing exclusive memory device comprises a data input/output device for supplying and receiving image data; a plurality of memory blocks coupled to the data input/output device for receiving, storing and transmitting neighbor image data via the data input/output device, individual segments of the data having corresponding addresses; and a plurality of address converters coupled to the memory blocks for selectively reading, writing and converting addresses in response to conversion mode signals received from an external source thereof. The converters simultaneously supply the addresses to the memory blocks for simultaneous access to individual segments of the neighbor image data in the memory blocks.

Abstract: A high time resolution electron microscope unit comprising a beam source for generating an exciting beam; a microscope for exposing the surface of a specimen to be observed to the exciting beam for emitting electrons from the surface; an image formation device for receiving the emitted electrons and for displaying an image representative of variations in the surface of the specimen; a gate mechanism for controlling the flow of emitted electrons from the specimen toward the image formation device; deflecting plates for deflecting the emitted electrons from the gate mechanism onto the image formation device; and a drive circuit for synchronizing the operation of the gate mechanism, the deflecting coil and the beam source.

Abstract: A crystal structure arrangement used in a spatial light modulator wherein an electrooptic crystal structure faces an electron beam source, such as a photocathode or an electron gun, within a vacuum envelope. Electrons emitted from the electron beam source in response to an image or image signal source are stored on the surface of the electrooptic crystal structure to form a charge image thereon and then to change the refractive index of the electrooptic crystal structure corresponding to the stored charge image. The refractive index change is read out using a laser beam or incandescent light beam.

Abstract: An angle-of-optical-rotation variation measuring apparatus for measuring the highly speedy time-variation of an angle of optical rotation of an optical active substance. The angle-of-optical-rotation variation measuring apparatus comprises an exciting pulse generating source for producing and providing an exciting pulse to a specimen, a light source for providing a monochromatic linearly polarized light beam with the specimen, continuous analysis means for optically rotating the light beam passed through the specimen at successively different angles in the direction of a reference line predetermined to the apparatus and transmitting as an output light beam a part of the light beam which is optically rotated at a predetermined angle, and a streak tube for receiving the output light beam from the analysis means in a direction perpendicular to a time axis of the streak tube.

Abstract: A CPM pulse laser device is provided which has a means for emitting pulses in two separate directions. A return system is provided for returning one of the pulses to the laser resonator in such a manner that the returned pulse is superposed on the other pulse which was propagated in the other direction. The return system preferably includes a total reflecting mirror or a nonlinear crystal. The position of the total reflecting mirror or nonlinear crystal is precisely adjusted to create the superposition.

Abstract: A spatial light modulator consists of an electron beam source formed within a vacuum envelope and an electro-optic crystal or organic film whose optical property changes corresponding to the charge stored on the surface thereof. The electro-optic crystal or organic film is fastened to the substrate through adhesive or the transparent conductive film which is covered with a low-vapor-pressure material.

Abstract: The double sweep streak camera device of the present invention includes a streak tube having a pair of first deflecting electrodes for forming a deflecting electric field in the direction of a time axis at the rear stage of a focusing electronic lens system in an image tube and a pair of second deflecting electrodes for forming a deflecting electric field substantially perpendicular to the aforementioned deflecting electric field formed by the first deflecting electrode. A DC high voltage generating unit supplies operating voltages to the streak tube and first trigger signal generating units provides a first trigger signal in synchronization with a light beam under measurement. A first deflecting voltage generating unit applies a sine wave or a ramp deflecting voltage to the first deflecting electrodes in synchronization with the first trigger signal to cause the first deflecting electrodes to form the deflecting electric field.

Abstract: An instrument measures fluorescence which has occurred in a sample stimulated by X rays. The instrument consists of a laser device, an X-ray pulse generation tube excited by the laser pulse from the laser device, a light sensor for detecting fluorescence in the sample, a reference timing pulse generator, a time-to-voltage converter to indicate the time of fluorescence and a multichannel analyzer to sum the frequency of times that the designated voltage is issued from the time-to-voltage converter in each voltage level during measurement.

Abstract: An instrument concurrently measuring the ultra-high-speed light signals on a plurality of channels, and consisting of a streaking tube, optical means, deflection voltage generation means, a photodiode array and processing means. It can be used to periodically measure the mechanical distortion of the object being measured when a dye laser beam pulse is incident of the object, and time-serial data is developed on a plurality of channels to output parallel data on a parallel time base.

Abstract: Improved spatial light modulators, each consisting of an electron beam source formed within a vacuum envelope, i.e., a photoelectric layer; and a electro-optical crystal to store electrons emitted from the electron beam source as a charge to change the optical refraction index thereof. The charge storage surface of the electro-optical crystal constitutes a dielectric multilayer mirror or a specific dielectric film layer whose surface resistance is high and stable enough to store the charge in a high vacuum of 10.sup.-7 torr at an elevated temperature of 350.degree. C.

Abstract: A system for calibrating the time axis of an X-ray streak tube comprising a light source for generating a train of light pulses and an X-ray tube including a photocathode for receiving the light pulses. Upon receiving the light pulses, the X-ray tube generates a train of X-rays which excite the photocathode of the streak tube causing it to emit an electron beam. The electron beam is scanned by a sweep voltage synchronized with the light pulses and applied across deflection electrodes in the streak tube. The deflected beam impinges on the phosphor screen of the streak tube where the time interval of the streak image is measured.

Abstract: A high speed light detection tube consists of a planar photoelectron source of transparent type, a photoelectron collection electrode arranged in parallel with the photoelectron source and an acceleration electrode of transmission type arranged in parallel with the photoelectron source in a space between the photoelectron source and the photoelectron collection electrode. The potential distribution has been set so that the photoelectrons passing through the acceleration electrode can be incident on the photoelectron collection electrode at a constant speed or near value.

Abstract: A laser pulse train jitter measuring device includes a first optical path having a length set at a first value or a second value and a second optical path having a length variable between a first value and a second value. A laser beam is split into a first beam directed to the first optical path and a second beam directed to the second optical path. The split beams are recombined into a correlated beam and recorded as visible images so that jitter in the laser beam can be detected from the differences in the recordings when the first optical path has its first length while the second optical path is varied between the first value and the second value from when the first optical path has its second length while the second optical path is varied between the first value and the second value.

Abstract: A streak tube device for electrically slitting the image of an object provided by an optical system. The streak tube device includes a streak tube body having a photoelectric conversion device for receiving the object image and producing a corresponding electron image. The streak tube device further includes focusing apparatus for focusing the electron image, electrical slitting apparatus for transmitting a selected portion, that is, slit images of the electron image, apparatus for controlling the electrical slitting apparatus, and focusing apparatus for focusing slit images on a fluorescent surface included within the streak tube body. The electrical slitting apparatus of the streak tube device includes a slit member having a slit which extends across the streak tube body, shift electrodes for vertically shifting the transmitted electron image, and a circular collimator for collimating the shifted electron image and transmitting the collimated electron image through the slit to form a slit image.