used to color video projection device which suppresses small etendue, lighting apparatus using the optical correction system

摘要

It is an illuminating device constituted by providing a first arc lamp in the first optical axis of the first structure reflecting element. Providing an aspherical correction plate beam from the arc lamp is incident. I make up the non-spherical correction plate to form that gives the magnification of the substantially constant arc as a function of the reflection angle range of light rays reflected from the reflector element. [Selection Figure 11