| Optical free-form surfaces have many advantages, when applied in the optical imaging systems, not only can they effectively eliminate the system aberration and improve the image quality, but also the quantity and weight of the system units can be reduced. When used in the design of high-performance lighting system, they can effectively raise the utilization rate of the light energy, and offer a deal of freedom for the design at the same time. Even so, optical free-form surfaces still can't make the entry into the mainstream of the modern optical system; one of the main obstacles is the lack of high precision Fast Detection Technique.From the study of the shape parameters of the free-form surfaces and their embody method, the description methods of optical free-form surface in optical design are summarized. By studying test techniques of optical free-form surfaces, the most advantageous method that based on the Twyman-Green Interometer with a modification is chosen. The specialty of this configuration is that micro-lens array introduced in the test arm which will generate point source array as the test light in order to achieve multi-channel tilted pumping fronts and multi-channel Interferogram. There are two important elements in this configuration. One is micro-lens array, the other is standard spherical lens. This thesis mainly talked about both of them. First, a design proposal for the standard spherical lens was given by studying the traditional standard spherical lens and analyzing the optical aberration. Two optical systems which meet requirements are designed. And their PV values are better thanĪ»/20. The numerical aperture for the micro-lens array in which the magnitude is a few percent by statistical analysis of the parameters for micro-lens array. Study the micro-lens array in the lab, and then design a optical system to increasing the numerical aperture of micro-lens array. The theoretical work is well done for the next experimental platform. |
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