A Hardware Complex Using a Scheme for Simultaneously Obtaining the Image of a Rapid Process in Reflected and Passing Lig
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A Hardware Complex Using a Scheme for Simultaneously Obtaining the Image of a Rapid Process in Reflected and Passing Light S. I. Gerasimova,b,c,d,*, V. I. Erofeevc,d, M. I. Krutike, K. V. Totyshevb, E. G. Kosyaka, P. G. Kuznetsova, and R. V. Gerasimovaa a Sarov
Institute of Physics and Technology, Branch of National Research Nuclear University MEPhI, Sarov, Nizhny Novgorod oblast, 607186 Russia b Russian Federal Nuclear Center, All-Russian Research Institute of Experimental Physics, Sarov, Nizhny Novgorod oblast, 607190 Russia c Nizhny Novgorod State Technical University, Nizhny Novgorod, 603950 Russia d Institute for Mechanical Engineering Problems, Russian Academy of Sciences, Nizhny Novgorod, 603024 Russia e SPE NANOSKAN LLC, Moscow, 107076 Russia *e-mail: [email protected] Received January 28, 2020; revised February 27, 2020; accepted March 12, 2020
Abstract—This paper describes the results of the development and the main technical characteristics of an optical-photoelectronic complex, which is designed to simultaneously obtain images of rapid processes in reflected and transmitted light. It consists of two devices for high-speed registration of domestic production, a pulsed light source with a gas-discharge point emitter, and a translucent diffuse-scattering screen. Examples of the practical application of the complex for obtaining information in aeroballistic and gas-dynamic experiments, including those accompanied by intense background thermal radiation, are given. DOI: 10.1134/S0020441220040259
In a number of applied problems (ballistics, aerodynamics, explosion physics, etc.) an increase in the speed of an object of research is accompanied by background radiation caused by ionization of the surrounding gas, which reduces the information content of a photograph of the process in reflected light. To increase the information content of a picture, one can simultaneously obtain a shadow image from the same light source that has the point dimensions of the emitter. This is important not only in the case of hypersonic speeds, but also in supersonic modes, when a photograph in reflected light allows one to observe the state of the surface of the investigated object (for example, marking the surface of the model applied for subsequent photogrammetric measurements), and a shadow photograph allows one to analyze the spectrum of its flow.
image converter camera (ICC) with corresponding digital image input systems, a control computer with image input controllers on the PCI bus, an industrial computer, connecting cables and software for managing the complex. The parameters of the ICC are a spectral sensitivity range of 380–800 nm; a shutter lag (“dead time”) of no more than 80 ns; instability (jitter) of camera startup no more ±20 ns; a delay start gate pulse from 80 ns
To implement this scheme, a hardware complex has been developed that contains two devices for highspeed registration of domestic production, that is, a pulsed light source with a gas-discharge point emitter and a trans
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