Abstract: Gas purge systems and methods and a spectroscopic ellipsometer are disclosed. A purge gas system may include an input beam optics housing, a collection optics housing and a gas purge manifold. The input beam optics housing may include a first gas flow path between a first gas inlet and an aperture in a first nose cone proximate a measurement position. The collection optics housing may include a second gas flow path between a second gas inlet and an aperture in a second nose cone proximate the measurement position. The gas purge manifold may be disposed between the input beam optics housing and the collection optics housing. The gas purge manifold has a third gas flow path between a third gas inlet and an aperture in the gas manifold proximate the measurement position. The ellipsometer may include input beam optics in the input beam optics housing and collection optics in the collection optics housing.

Abstract: In one embodiment, a method is described. The method of designing a web application includes designing a set of components, each component having a set of instances. The method also includes designing an application having references to the set of components. The method further includes designing an interface having references to the application, and building the application based on the interface and the designing of the application.