Generic model for line-of-sight analysis and calibration

Zvika Afik; A. Shammas; Roni Schwartz; Eli Gal

doi:10.1117/12.49080

1 April 1991 Generic model for line-of-sight analysis and calibration

Zvika Afik, A. Shammas, Roni Schwartz, Eli Gal

Proceedings Volume 1442, 7th Mtg in Israel on Optical Engineering; (1991) https://doi.org/10.1117/12.49080
Event: 7th Meeting of Optical Engineering in Israel, 1990, Tel-Aviv, Israel

Abstract

1ariy electrooptical (E'O) systems incorporate an inaging sensor and a Line of Sight (LOS) deflection mirror. At a higher system level, such as for fire control or mIssile homing applications, these sensors are required to neasure angular target position very accurately. This work presents ar approach that has been developed for the modeling and calibration of such electrooptical systems. Using a generic system which includes a mirror mounted on a twoaxis LOS steering unit and an imaging sensor, a description of the mathematical model of the system is given here. This model may be used for system performance analyses as well as for developing various algorithms for the calculation of target angular position. The system model uses a number of calibration parameters such as gimbal nonorthogonality and other assembly and production errors. These are obtained from laboratory measurement results via a mathematical calibration model. We explain how the calibration model is developed from the system model. The method shown here can significantly reduce the number of computations and the look-up-table capacity needed in an operational system, as well as reducing the extent of laboratory calibrations usually required.

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Zvika Afik, A. Shammas, Roni Schwartz, and Eli Gal "Generic model for line-of-sight analysis and calibration", Proc. SPIE 1442, 7th Mtg in Israel on Optical Engineering, (1 April 1991); https://doi.org/10.1117/12.49080

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KEYWORDS

Calibration

Mathematical modeling

Electro optical modeling

Mirrors

Systems modeling

Sensors

Optical engineering

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