Atmospheric Dispersion In Adaptive Optics

摘要

Using methods associated with Zernicke's polynomial expansion, we discussedatmospheric dispersion effects in dual wavelength adaptive optics systems. On the basis of dual frequency correlations associated with phase expansion coefficients, we solved for residual phase errors produced by atmospheric dispersion. The results clearly showed that, although atmospheric dispersion will cause phase compensation to be imperfect, the use, however, of light sources with wavelengths even shorter than the transmitting lasers as beacons, and, in conjunction with that, taking the product of the amount of beacon phase distortion and the specific value of the ratio (lamda 2)/(lamda 1) (the beacon wavelength/ transmitted wavelength) to be the phase predistortion, it is possible to rectify relatively well the phase distortion of transmitted light beams. (AN).