Three-dimensional observation apparatus

摘要

A 3-D observation apparatus includes a projector and an imaging means of positive refractive power. The projector projects left and right stereo images through respective apertures so that the images overlap. The imaging means forms images of the respective apertures which serve as exit pupils of the 3-D observation apparatus. The imaging means: (1) has its optical axis decentered to prevent the observer's head from interfering with the projector, (2) is formed of either a Fresnel lens or a Fresnel mirror, and (3) is positioned substantially at the overlapped images. A diffuser is provided substantially at the imaging means for the purpose of enlarging the size of the exit pupils, while not allowing them to overlap. In this way, a viewer can comfortably view the overlapped 2-D images and will experience them as 3-D images without having to wear special glasses.