ESTIMATION OF ACCURATE DETERMINATION FOR COORDINATES OF GRAVITY ENERGY CENTER IN COLLIMATOR TEST-OBJECT IN RESPECT OF CONTROL SCHEMES FOR OPTOELECTRONIC DEVICES WITH MATRIX PHOTODETECTORS
Abstract
The paper considers a control scheme of such optoelectronic devices with matrix photo-detectors as autocollimators, microscopes, star trackers and other film equipment an d the control is carried out with the help of a collimator. A number of factors (structure discreteness, photo-detector noise, consistency in collimator test-object size, photo-detector pixel size and point scattering function of optical components) exert an influence on control accuracy.
In the context of control problems and alignment of optoelectronic devices the paper studies a scheme which includes two components: controlling component that is a collimator and a component to be controlled that is a tele-centric system). A mathematical model for control schemes has been proposed with the purpose to determine an effect of the above-mentioned factors and its mathematical implementation has been described in the paper.
Due to simulation an optimal ratio has been selected for component parameters of the optical control scheme: point scattering function for a collimator objective and a telecentric system, collimator test-object size, photo-detector pixel size. A collimator test-object size has been determined in the paper. Using the considered scheme the size will give the smallest measurement error caused by photo-detector discreteness of a controlled device. A standard deviation of the gravity energy center for a collimator test-object caused by photo-detector noise has been determined in the paper. In order to reduce the effect of photo-detector noise the paper proposes to take as zero values of a signal such values which are smaller than a doubled discretization interval of an analog-to-digital converter.
About the Authors
M. A. Starasotnikau
Peleng, JSC;
Belarusian National Technical University
Belarus
Belarus
Engineer
R. V. Feodortsau
Belarusian National Technical University
Belarus
Doctor of Engineering
Belarus
Doctor of Engineering
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Review
For citations:
Starasotnikau M.A., Feodortsau R.V. ESTIMATION OF ACCURATE DETERMINATION FOR COORDINATES OF GRAVITY ENERGY CENTER IN COLLIMATOR TEST-OBJECT IN RESPECT OF CONTROL SCHEMES FOR OPTOELECTRONIC DEVICES WITH MATRIX PHOTODETECTORS. Science & Technique. 2015;(5):71-76. (In Russ.)
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