The System for Autofocusing of Wide-Field Cameras

Details The System for Autofocusing of Wide-Field Cameras The System for Autofocusing of Wide-Field Cameras

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004esasp.552..797v&link_type=abstract

Proceedings of the 5th INTEGRAL Workshop on the INTEGRAL Universe (ESA SP-552). 16-20 February 2004, Munich, Germany. Scientific

Physics

Scientific paper

Automatic focusing of objectives (lenses) of robotic telescopes (systems without human interaction) is further important task. These systems are in the first place well known eperiments BART (Ondrejov, Czech Republic) and BOOTES (Integral ground- based experiment, Al Arenosilo, Spain). In this work is described technical solution of autofocusing sys- tem. In our solution have been exploited processor 80c52, controlled via serial port from PC and stepper motors mounted on SBIG cameras. Designed system provide control of 4 cameras simultaneously. System provide measuring of temperature and humidity in immediate distace of cameras. In work will be de- scribed unique algorithms for evaluation of focusing degree (based on analysis of Fourier spectra of Gaus- sian objects) and their implementation. Key words: BOOTES; BART; focusing; wide-field camera; FWHM; Point Spred Function; Fourier transform.

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