An Ultra Short-Focus Front Projector Using Reflective Projection Optics

As a result of improvements in the brightness and resolution of the front projectors used for the magnified display of information, the market for these compact and easily installable presentation tools has continued to show significant growth. In order to improve their performances even further, NEC Viewtechnology has developed a front-projection system that uses reflective lenses only to replace refractive lenses for the projection optics. The system configuration features four aspheric mirrors and achieves an ultra short focusing distance that enables projection onto a large 100-inch screen at a projection distance of only 0.65 meter.