Methods for correcting aberrations of images, obtained by an optoelectronic camera with the use of preliminary measured calibration function, provoke wide interest in recent years. For the most part these methods are not characterized by high accuracy and are typically used for cameras with objectives having rather high relative distortion. In this article the method is discussed for measuring distortion of a wide-angle objective for calibration of photoelectric cameras designed to measure angular coordinates of remote objects with the accuracy as high as 10 arcseconds. It is proposed to use an air mirror-wedge as a test object, which allows creating a sheaf of collimated beams. The calibration function of a photoelectric camera is calculated by mathematical post-processing of the recorded frames.The proposed method was experimentally tested for photoelectric cameras with full angular fi elds-of-view of 21 degrees and angular pixel sizes of 20 arcseconds. The subpixel accuracy of determining the calibration function is demonstrated.
The features of development and optimization of software for real-time LIDAR data processing are considered. The advantages of the LabVIEW graphical development environment for creating highly optimized applications using parallel execution threads and pipelined data processing are shown.
This paper continues the previous publication «Laser for generation of ultrashort pulses with controllable duration for robotics» [1] and concerns latest investigations of the novel technology of using a controllable Michelson interferometer as the laser resonator output mirror. The proposed algorithm of controlling phase modulation allowed to demonstrate the feasibility of preferential amplifying and extracting several subnanosecond radiation pulses with enhanced peak power from a train of synchronization mode pulses. The preferences, shortcomings and perspectives of the considered technology development are discussed.
This paper presents the analysis and experimental research of an original scheme of the solid-state laser resonator, capable of emitting subnanosecond radiation pulses with controllable duration. For this purpose, it is proposed to use the controllable Michelson interferometer, containing an electro optical phase modulator as a composed output resonator mirror. In this case, the interferometer provides the active resonator mode locking as well as the fast resonator Q-switching mode for effective generation of the output radiation pulses with variable duration.
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