| In recent years, countries are investing huge amounts of money to build a number of large astronomical facilities from the ground to space for large-scale astronomical spectroscopic observations. The competition is very fierce especially in the large field of Multi-Object Fiber Spectroscopic observations. In order to transmitted the luminous energy to the spectrometer, quickly and accurately positioned the fiber to the position of the spot be required when Fiber Spectroscopic Telescope observation. Therefore, the optical fiber positioning technology is a key technology.Based on analyzed and contrasted several adopted and still in the research and development stage optical fiber positioning technology, advanced a four-quadrant detector-based optical fiber positioning Technical program. As a common position sensitive devices, quadrant detector are widely used in the laser-guided, laser collimator, photoelectric tracking. Particularized usual position methods, analyzed the influence of the spot size to the linear range theoretical. Analysis and estimates the parameters of the amplification circuit according to the parameters of the selected element, designed precision signal amplification circuit using OP07CP. Contrasted several denoising methods and designed of the filter circuit. Analyzed and processing of the experimental data and verified the positioning program. |
