Multifunctional device suitable for heliograph projecting and photographing

Provided is a multifunctional device suitable for heliograph projecting and photographing. A human eye observing or projecting device is composed of an objective lens and a display screen. The multifunctional device is characterized in that an objective lens group, a beam splitter, a concave lens and a cell phone photographing window are arranged along the optical axis from outside to inside, anda projection screen is arranged on one side, perpendicular to the direction of the optical axis, of the light splitter. A cell phone/camera photographing light path is composed of the objective lens group, the light splitter and the concave lens; a cell phone/camera is placed on the photographing window, so the heliograph photographing function can be realized. A heliograph projecting light path is composed of the objective lens, the light splitter, the concave lens and the projecting screen, and an observer can see a clear amplified heliograph on the projection screen. By means of the multifunctional device, integral