From the acknowledged world in the projection screen industry.

 Draper is the industry leader in the development of rigid rear projection screens. 
  Only Draper can provide four unique rear projection screen technologies to satisfy any requirement:  IRUS,  Cinescreen,  Vortex, and  DiamondScreen.
  Our HoloView provides unprecedented image clarity and sharpness in a transparent holographic screen.
  Our Cineframe® may be used with any of the above screens.
  Cinefold and Truss-Style Cinefold give you rear screen projection on a very large scale with portability.
  Consider Cineperm for rear projection in a home theatre setting.
  Our patented VideoWall Framing Systems can be combined in almost any configuration.  And our Projector Support Structures are the best in the industry.
  Each of our MultiScreen Systems is a unitized, self-supporting rear screen/projector cradle system designed for multiple rear screen information display installations.
  Our Retro/QA is a portable, self-contained rear projection system.
  All of our Rear Projection Systems use only the finest optical quality, first surface glass mirrors. Take the guesswork out of rear screen system design with our Adjustable RPS. The RPS/Precision offers world’s most precise image alignment capabilities. Draper's RPS/Complete has all the features of an Adjustable RPS plus a framed rear screen attached to the structural uprights. Our RPS/Lite is an economical mirror system designed for use with lighter weight projectors.