Ultrakompakte projiseringslinser med ultrahöy ensartethet til projiseringsfremvisning

摘要

An apparatus for projecting images onto a projection screen is disclosed. The apparatus incorporates novel features to reduce both cost and size while providing a high level of illumination uniformity at the projection surface. Specifically, the apparatus uses an illumination focusing group for providing a uniform level of light on the image to be projected. The illumination focusing group is designed to make use of lenses unsuitable for use as projection lenses, thus reducing scrap and the attendant cost thereof.