Methods for Determining the Amount of Multielectronic Scintillations on the Screen of Electro – Optic Transformer of Images

Abstract

One of the basic requirements when using electro – optical transformer (EOT) of images in space research is the low level of bright light flashes on the screen, called multi – electronic scintillations. The experimental research of number and brightness of scintillations show that the distribution of the multi–electronic scintillations’ number across the screen’s diameter could be approximated by a normal law. The analysis of multi – electronic scintillations amplitude spectrum shows, that in the center of the EOT’s screen, the number of scintillations with greater amplitude is significantly greater in comparison with those at the end of the active surface of the screen.

Satellite Monitoring

“…On the one outlet of the optical coupler 14 is mounted the start of the lightguide 16, and to the other outlet is mounted a photoreceiver 17, whose outlet is electrically connected to the unit for signal processing 18, and the outlet of unit 18 is connected to the microprocessor system 50. Units 11,12,13,14,15,16,17 and 18 form the photometric tract 10 of the spectrophotometer. In a similar manner to the optical axis starting from the reflective element 21, part of the said spectrometric tract 20, are placed in succession lens 23 and optical coupler 24, mechanically connected to the step motor 25, also electrically connected to the microprocessor system 50.…”

“…Satellite spectrophotometer for monitoring of the environment filter 16, optical lens 17, microprocessor system 19, analog-to-digital converters (ADCs) 20 and 21, step motors 22 and 25, gear drive 23, photoelectric converters angle-code 24 and 27, mechanical block 26, where the dimming aperture (1) is positioned in front of the flat scanning mirror (2) with mounted in it reference source (3), which constitute an input scanning system of photometric and the spectrometric tract and are mechanically coupled to the step motor (22) via the gear (23). The photoelectric converter angle-code (24) is electrically connected to the step motor (22) and opposite to the flat scanning mirror (2) on the same optical axis is positioned concave mirror (5) and between them is fixed the reflecting prism (4), optically connected to the concave mirror (5) of the spectrometric tract, and to the flat mirror (14) of the photometric tract. The concave mirror ( 5) is connected optically with the flat mirror (6), which in turn through the inlet diaphragm (7) has an optical connection to the concave mirror (8) and from there to a diffraction grating (9) mounted on a movable carrier (10).…”

“…The concave mirror ( 5) is connected optically with the flat mirror (6), which in turn through the inlet diaphragm (7) has an optical connection to the concave mirror (8) and from there to a diffraction grating (9) mounted on a movable carrier (10). The diffraction grating ( 9) is connected optically through the lens (11) and the outlet diaphragm (12) to the sensor (13). The flat mirror (14) of the photometric tract is connected optically through the lens (15), the interference filter (16) and the optical lens (17) to the sensor (18).…”

Energy Efficiency of a System for Primary Processing of Signals in an Opto-Electronic Device Operation Under Low-Contrast Conditions

“…In this study, the signal-to-noise ratio shall be used as an evaluation criterion for the energy efficiency of the system for primary processing of information. Accounting for the fact that the observed (studied) object emits during a certain time interval Δt monochromatic flow of N1 photons, while the background emits N2 photons (N2>> N1), and accounting as well for the fact that the emission receiver features generalized quantum efficiency Yλ [6] based on the well-known expression [3]. we can write for signal power and quantum fluctuations 2…”

Non-Linear Receiver Reaction of Irradiation With Complex Spectral Composition

“…At spectro-photometer for atmospheric ozone exploration development at the Space Research Institute -Bulgarian Academy of Sciences [1][2][3][4][5][6][7] come into being be necessity of calculation of the output signal of the irradiating receiver by fixed spectral composition and intensity. The calculation would not be difficult if the density values range is situated on the linear part of the irradiating receiver spectral characteristic.…”