Front-projection optical-system design for reflective LcoS technology

摘要

Optical designs for three-panel LcoS projection systems are reviewed. The impact of polarization aberrations in prism-bases systems is discussed and a simple model to analyze the sen- sitivity of contrast to thermal gradients in prisms is presented. To eliminate stress birefringence in LcoS projection systems, we have developed a projection optical system that does not require the use of polarizing prisms. An improved off-axis design has been designed that simplifies manufacture and reduces cost. The performance of systems based on this architecture will be discussed.