The research of the cross-links effect influence in the color matrix photodetector on an error of the air tract vertical
temperature gradient determination is provided. It is invited to consider the influence of the signals from matrix
photodetector channels on each other. There is a method to determine the value of the cross-links effect ant its influence
on the energy center coordinates determination.
The paper deals with a type of optical-electronic instruments based on the optical equisignal zone. For the most
applications the difference signal in the equisignal zone is required to be independent on the distance. The purpose of the
study is to find interrelation of parameters of an optical system, of sources and of the receiving part providing constant
difference signal. It is known that if the source has a uniform radiance and an ideal objective (without aberrations) is
used, in order the width of the transitional zone be independent on the distance, the objective must be focused on infinity.
In practice homocentricity of the pencil of rays is influenced by the spherical aberration. Study of impact of the 3th order
abberrations on the width of the transitional zone, and as a result, on radiance distribution, allowed to find equations
linking the width of the transitional zone, exit pupil diameter, and irradiance of the sources. It is shown that the relative
difference signal depends on relation of the product of spherical aberration value and distance to the exit pupil diameter,
thus relative difference signal can be reduced with refocusing on a required distance. Based on obtained relations and
experimental results we conclude that using an appropriate processing of the difference signal, correction of spherical
aberration of the objective and focusing the projector into infinity, constant static characteristics may be achieved.
KEYWORDS: Control systems, Photodetectors, Signal processing, Control systems, Photodetectors, Receivers, Projection systems, Modulation, Data processing, Monochromatic aberrations, Optical components
In this paper we attempt to assess the possibility of applying the array of photodetectors and digital information processing in positioning systems based on optical equisignal zone. The basic theoretical information about working principles of the system with equisignal zone and the formation of the base direction are listed. The influence on the accuracy of the positioning system some parameters such as the number and size of the array elements of the receiver, capacity analog-digital converter, aberrations of optical elements are researched. The possibility of registering the angular displacements (reversals) of the controlled object by using the developed system is shown.
KEYWORDS: Receivers, Projection systems, Light sources, Sensors, Detection and tracking algorithms, Modulation, Digital signal processing, Control systems, Objectives, Data processing
In this work we are trying to assess the application of array detectors and digital information processing to the system with the optical equisignal zone as a new method of evaluating of optical equisignal zone position. Peculiarities of optical equisignal zone formation are described. The algorithm of evaluation of optical equisignal zone position is applied to processing on the array detector. This algorithm enables to evaluate as lateral displacement as turning angles of the receiver relative to the projector. Interrelation of parameters of the projector and the receiver is considered. According to described principles an experimental set was made and then characterized. The accuracy of position evaluation of the equisignal zone is shown dependent of the size of the equivalent entrance pupil at processing.
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