Atmospheric Dispersion In Adaptive Optics,
Abstract
Using methods associated with Zernicke's polynomial expansion, we discussed atmospheric 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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 16, 1994
- Accession Number
- ADA289639
Entities
People
- Yuezhong Feng
- Zhengfang Song
- Zhiben Gong
Organizations
- National Air and Space Intelligence Center