Refurbished projector – A good choice in case you are hard on cash.
There are many refurbished projectors that are in an excellent condition from reputable companies. If you do your homework properly, you will most probably find a cheap refurbished projector that is still in an excellent condition. Overhead projectors all use traditional lamp bulbs to project an image. The type of lens they use primarily determines their image quality: singlet, doublet or triplet. There are two types of overhead projectors: transmissive and reflective. A transmissive projector's light source is contained within its base, and a reflective projector's light source is contained in the top ("head") of the unit.
Slide projectors work by bouncing light off of a reflector, through a transparent film slide and an image-focusing ring, and out onto the projection screen. Few manufacturers produce slide projectors any more, so finding a new one may be difficult. A refurbished projector, or even a discount-refurbished projector, might be all that is available, should you be looking for a slide projector specifically.
Multimedia Projectors can be used to project images from many different sources, like your DVD player or your laptop computer. Multimedia projectors can produce fantastic video quality and many people are replacing their TV sets with a projector and screen for the ultimate home theater experience. Multimedia projectors come in three types: CRT, LCD and DLP.
CRT projectors produce an image comprised of red, green and blue light. They project crisp images at any resolution with a full range of colors and the blackest blacks.
LCD projectors create an image by projecting light through a small, transparent LCD panels. They're much smaller and more portable than CRT projectors, which makes them perfect for home or office use. If you want to use your projector for home theater, be sure to shop for an LCD projector that is designated specifically for home theater use. Less expensive office models tend to have lower resolutions.
DLP projectors create an image by projecting light through a transparent chip onto a minute mirror array, resulting in high quality, high definition images. They're great for office or home theater use and they don't suffer from "screen door effect" like LCD projectors.