The continuing trend towards miniaturization and integration, well-known from electronics, is also a significant factor for optical system development. Many novel applications depend on the availability of suitable components and subsystems that offer features like small size, low cost, robustness, and capability for integration with other technologies. This is what micro-optics is about. For more than 20 years, there has been constant improvement in the area of micro-optics. The purpose of this book is to provide an overview of the latest activities on fabrication technology, modeling and design, systems integration, and applications. The book brings together contributions from different areas of micro-optics to describe the status of their work. Configurations based on both waveguide and free-space optics are covered. The reader can expect up-to-date information with many new results.