Open AccessResearch on the mechanism of reflection characteristics of laser irradiation on cat eye optical lens
Author(s) -
Yanzhong Zhao,
Houjun Sun,
Song Feng-hua,
Liming Tang,
Weiwei Wu,
Xi Zhang,
Hao Guo
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.2284
Subject(s) - optics , lens (geology) , laser , focal length , physics , spherical aberration , optical tweezers , reflection (computer programming) , gaussian beam , optical axis , aperture (computer memory) , beam (structure) , materials science , computer science , acoustics , programming language
Using the theory of matrix optics and expanding the aperture function into a sum of finite complex Gaussian functions, this paper theoretically deduces the mechanism of cat eye effect generated by laser irradiation on the cat eye optical lens and analyzes the reflection law of cat eye effect through numerical computation. Then an experiment is operated to validate the cat eye effect by making 532nm laser irradiate on an optical zoom lens whose focusis ranged between 12 and 72mm. By using the above method, the law governing the variation of laser reflection characteristics with the parameters of the transmitting laser beam and the cat eye optical lens, including aperture, focus and focal shift etc, is established. The study reveals that the reflection characteristics of cat eye effect are intimately correlated with the parameters of the cat eye optical lens and transmitting laser beam, furthermore, the characteristics would change obviously when there is a large change in the distance between the waist of the incident beam and the cat eye optical lens. In particular, a reasonable choice of the positive focal shift would result in a higher peak intensity at the return place than that of no focal shift, when the distance between the waist of the incident beam and the cat eye optical lens varies, whereas the former conclusion based on geometry optics was that the highest peak intensity could be obtained when the optical lens has no focal shift.