[en] 13 papers from the field of holography are dealt with. (WL/AK)

[en] The definition of mesooptics is presented. In the general case n-dimensional object is transformed into (n+1)-or (n+2)-dimensional image. The principle of the Mesooptical Fourier-Microscope, suggeseted for the examination of nuclear interactions in nuclear photoemulsions, used in the experiments in the high energy physics, has been described. Possible methods of data processing in the microscope are briefly discussed. The advantage of the mesooptical systems, as compared with the systems of classical optics, expecially for the point or linear objects, is demonstrated

No abstract available

[en] In a radiographic system a converter is used for changing image forming intensity distribution in a bundle of penetrating rays into a flow of electrically charged particles by electrodes located in a gas space and partly latticed (grids) which lie at potentials stepped from cathode to anode. The invention is particularly characterized by the provision of at least two grids extending between and parallel to the cathode and the anode. The electrical field which lies between two electrodes lies at least between the grids located closest to the cathode being to the extent of between 1 and 10 percent, in the average preferably 3 percent below the electrical break down field in the gas in a homogeneous electrical field

[en] In neutron radiography, as in other forms of NDE, it is sometimes desirable to observe dynamic events. This need has generated increased interest in the development of real-time neutron radiography systems and neutron-to-light converter screens optimized for real-time application. Two screens currently available at MURR are: (1) a 0.041-cm-thick Gd₂O₂S screen manufactured by 3M Company and (2) a ⁶KiF-ZnS(Ag) screen (NE 426) manufactured by Nuclear Enterprises. These screens are presently used in conventional film neutron radiography and represent two of the commercially available screens that have demonstrated the greatest resolution and sensitivity. Unfortunately, these screens have severe limitations when used for real-time neutron radiography. In order to isolate and minimize the factors contributing to these limitations, several neutron absorbers and phosphorus were studied at MURR. The screen thickness and the neutron absorber/phosphorus weight ratio was also varied and the resulting screens evaluated with respect to their sensitivity and MTF

[en] A technique for image reproduction of complex shaped objects using a series of radiograms is described. Peculiarities of digital synthesis and methods of the increase of local contrasts and numerical characteristics of image are considered. The present paper is the first stage of the general problem of digital radiation introscopes, ensuring presentation in the real time scale of the information on the structure of complex configuration objects. Experimental testing of the considered method of image synthesis was carried out using turbine blades as objects of complex configuration

[en] With high resolution picture processing, we are offering a system which is matched to the special requirements of high resolution real time radioscopy. Video signals with a bandwidth between 0 and 20 MHz can be digitalized. Operation is via a user surface, according to the OSF/Motif industrial standard. The picture processing is modularly included in our radioscopy and CT systems. The calculations can be expanded practically unlimitedly via the interface of the FFD card to the transputer world. The whole is based on a capable computer system from the firm of Digital Equipment (VAX/VMS) which makes it possible to include the plant in a computer network extending throughout the firm. (orig.)

No abstract available

No abstract available

[en] The use of streak cameras in laboratories working on Laser Fusion is still too often limited by the long procedure required for film processing before delivering an useful diagnostic. Here we present different ways (vacuum low level TV tube, linear solid state array of photodiodes) developed in our laboratory to readout the images of streak cameras. They provide time resolution in the 10 ps range, with one to 32 spatial channels and may be interfaced with the computer data acquisition system now used in Limeil