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A novel method to form plastic lensed fiber that could be used to manufacture in bulk quickly and raise the coupling efficiency is proposed. The way to form plastic lensed fiber is droping the mucilage on the fiber endface which is described in the reference, then the mucilage will be formed ball lens with surface tension. Next step is to force the ball lens to hyperbola shape with electric force. The method contains some restrictions including controlling the volume of the drop, the shrinking rate after curing, and the shape of the fabricated lens. The way improving the restriction of fabrication to achieve high coupling efficiency is described in this paper.

Changes in the mechanics of the lens capsule of the eye arising from alterations of its native configuration can lead to undesirable clinical results. One example is the surgical introduction of a hole into the lens capsule and subsequent removal of the cloudy lens during cataract surgery. The adverse effect is secondary cataract on the posterior lens capsule, brought about by a sudden proliferation of lens epithelial cells in the region. Understanding the biomechanics of the anterior lens capsule is necessary in order to model its behavior under various physiological conditions and predict its response to alterations and perturbations such as those during cataract surgery. Such knowledge will help in the improvement of techniques during cataract surgery, and in the design of artificial intraocular lens. In this study we present, for the first time, results that demonstrate that the anterior lens capsule exhibits non-homogeneity and regionally varying anisotropy. We also compute stresses in the lens capsule due to normal loading conditions and procedures such as a capsulorhexis.

The technology of high-power light-emitting diodes (LEDs) is mature. In this study, the LEDs were aged through high temperature to understand the packaging failure mechanisms under lasting lighting. The Tracepro optics simulation software is also applied to analyze the radiation pattern decay caused by curvature variation and material aging. In the experiment procedure, the LEDs of three manufactures were placed in aging ovens in three different temperatures set at 95¢J, 85¢J, and 65¢J. The experiment results showed that the LED failures were the lens and silicon gel yellowing, silicon gel carbonization, lens slightly chapping, silicon cracks, bubbles generated between lens and silicon gel, and chip damage induced reverse current increase during the aging experiment. We observed the failure mechanism in reduction of optical power at 90%, 80%, 70%, 60%, 50% original power. Furthermore, the failure mechanisms of different from the manufactures is also compared in this work. The LED packages have long lifetime without silicon gel carbonization. In simulation study, a gap of lens deformation showed a reduction at -60¢X~-40¢X and 40¢X~60¢X of the radiation pattern. The LED modules also showed that the silicon gel and PC absorption coefficient increased. Material absorption coefficient increased more in the short wavelength showed 149mcd at ¡Ó60¢X of the radiation pattern.

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