ABSTRACT
This chapter discusses the projection systems that create real images viewed with the use of a screen. It provides an overview of the major projection display types, how they operate, and the general characteristics. The screen luminance of a cathode-ray tube (CRT) projection display system is given by where B CRT is the luminance of the CRT in foot-lamberts, T is the transmission of the optical system, m is the system magnification, and F is the f number of the optics. Some CRT projection displays have automatic convergence systems, while others have to be manually converged. Active-matrix-addressed LCLV projection displays have added a new class of small, lightweight, low-cost video projectors competing with CRT projection displays. The chapter covers screens placed at the real image plane of the projection system as diffusers to view the image. CRT projection displays provide a high-quality dependable image, relying on mature CRT technology.
