Google print is great! (www.print.google.com) There is so much info. available. You can search quite a bit of text from tons of books. Once you have located a book you can search within that specific book as well.

A couple of simple search's turned up info like the following:

Search terms and types of books:

"fresnel" lcd : Practical Optical System Layout: And Use of Stock Lenses, Applied Photographic Optics, Inquiry into Physics, Topological Effects in Quantum Mechanics, etc.

"projection screen" : Color in Electronic Displays, Electrical-Optical Displays, The Eye and Visual Optical Instruments, etc.