Search PubMed⌕ Search

Biomedical subjects

Lingyu Wan

Publications and source records attributed to Lingyu Wan.

2 recordsLinked to original sources
PubMed2005

Mutual alignment errors due to wave-front aberrations in intersatellite laser communications.

We analyze mutual alignment errors due to wave-front aberrations. To solve the central obscured problem, we introduce modified Zernike polynomials, which are a set of complete orthogonal polynomials. It is found that different aberrations have different effects on mutual alignment errors. Some aberrations influence only the line of sight, while some aberrations influence both the line of sight and the intensity distributions.

Journal Article↗
PubMed2005

Wave-front analysis method of circular aperture sampling for collimation testing.

A new type of wave-front analysis method for the collimation testing of laser beams is proposed. A concept of wave-front height is defined, and, on this basis, the wave-front analysis method of circular aperture sampling is introduced. The wave-front height of the tested noncollimated wave can be estimated from the distance between two identical fiducial diffraction planes of the sampled wave, and then the divergence is determined. The design is detailed, and the experiment is demonstrated. The principle and experiment results of the method are presented. Owing to the simplicity of the method and its low cost, it is a promising method for checking the collimation of a laser beam with a large divergence.

Journal Article↗