Opaque projectors

Product category: 
Projectors
Abstract: 
Classroom aid, to project directly from books, maps, etc.

An opaque projector allows you to project images of solid, opaque objects. They generally require relatively dark rooms and produce rather dim images. See for products:
- http://www.bhphotovideo.com/c/shop/1513/Projectors_Accessories_Opaque_Pr...
- http://www.answers.com/topic/opaque-projector-shopping
- http://www.smarter.com/se--qq-opaque%2Bprojector.html