| dc.description.abstract | Nowadays, the application of optical elements are becoming more and more important for human being’s life, such as cellphone camera lenses, glasses, microscopes lens, etc., and the chromatic aberration that the optical elements caused are also can’t be ignored. If the optical elements we used have chromatic aberration, we will not only found that the edge of the image will blur, but also saw the edge will produced different colors. So, the techniques of manufacture achromatic lenses are becoming more and more important. But, before we making the achromatic lenses, we must be measure and quantify the chromatic aberration. In this thesis, we use Shack-Hartmann Wavefront Sensor to measure wavefront information to analysis the chromatic aberration that the sample caused.
We use the characteristics of Shack-Hartmann Wavefront Sensor to derive the focal point position, then obtain the image position for the different color light sources propagate through the tested lens, so that we can calculate the chromatic aberration of the tested lens. In order to align the experiment system, which we can precisely measure Longitudinal Chromatic Aberration(LCA) and Transverse Chromatic Aberration(TCA), we built a collimator, and we also measured the sensitivity of the collimator to ensure that it can meet the accuracy we want for our alignment. Before measuring the chromatic aberration of the samples, we need to measure the chromatic aberration that Shack-Hartmann Wavefront Sensor caused, and minimize its effect of the chromatic aberration measurement, to ensure we measure the sample’s chromatic aberration correctly. | en_US |